/* ELF executable support for BFD.
- Copyright 1991, 1992, 1993 Free Software Foundation, Inc.
+ Copyright 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
Written by Fred Fish @ Cygnus Support, from information published
in "UNIX System V Release 4, Programmers Guide: ANSI C and
once in 64-bit mode. More of it should be made size-independent
and moved into elf.c.
-*/
+ (3) ELF section symbols are handled rather sloppily now. This should
+ be cleaned up, and ELF section symbols reconciled with BFD section
+ symbols.
+ */
-#include <assert.h>
#include <string.h> /* For strrchr and friends */
#include "bfd.h"
#include "sysdep.h"
+#include "bfdlink.h"
#include "libbfd.h"
#include "libelf.h"
-#ifndef alloca
-PTR alloca ();
-#endif
-
/* Renaming structures, typedefs, macros and functions to be size-specific. */
#define Elf_External_Ehdr NAME(Elf,External_Ehdr)
#define Elf_External_Sym NAME(Elf,External_Sym)
#define Elf_External_Phdr NAME(Elf,External_Phdr)
#define Elf_External_Rel NAME(Elf,External_Rel)
#define Elf_External_Rela NAME(Elf,External_Rela)
-
-#define elf_symbol_type NAME(elf,symbol_type)
+#define Elf_External_Dyn NAME(Elf,External_Dyn)
#define elf_core_file_failing_command NAME(bfd_elf,core_file_failing_command)
#define elf_core_file_failing_signal NAME(bfd_elf,core_file_failing_signal)
-#define elf_core_file_matches_executable_p NAME(bfd_elf,core_file_matches_executable_p)
+#define elf_core_file_matches_executable_p \
+ NAME(bfd_elf,core_file_matches_executable_p)
#define elf_object_p NAME(bfd_elf,object_p)
#define elf_core_file_p NAME(bfd_elf,core_file_p)
#define elf_get_symtab_upper_bound NAME(bfd_elf,get_symtab_upper_bound)
+#define elf_get_dynamic_symtab_upper_bound \
+ NAME(bfd_elf,get_dynamic_symtab_upper_bound)
+#define elf_swap_reloc_in NAME(bfd_elf,swap_reloc_in)
+#define elf_swap_reloca_in NAME(bfd_elf,swap_reloca_in)
+#define elf_swap_reloc_out NAME(bfd_elf,swap_reloc_out)
+#define elf_swap_reloca_out NAME(bfd_elf,swap_reloca_out)
+#define elf_swap_dyn_in NAME(bfd_elf,swap_dyn_in)
+#define elf_swap_dyn_out NAME(bfd_elf,swap_dyn_out)
#define elf_get_reloc_upper_bound NAME(bfd_elf,get_reloc_upper_bound)
#define elf_canonicalize_reloc NAME(bfd_elf,canonicalize_reloc)
#define elf_get_symtab NAME(bfd_elf,get_symtab)
+#define elf_canonicalize_dynamic_symtab \
+ NAME(bfd_elf,canonicalize_dynamic_symtab)
#define elf_make_empty_symbol NAME(bfd_elf,make_empty_symbol)
#define elf_get_symbol_info NAME(bfd_elf,get_symbol_info)
#define elf_print_symbol NAME(bfd_elf,print_symbol)
#define elf_set_section_contents NAME(bfd_elf,set_section_contents)
#define elf_no_info_to_howto NAME(bfd_elf,no_info_to_howto)
#define elf_no_info_to_howto_rel NAME(bfd_elf,no_info_to_howto_rel)
-#define elf_hash NAME(bfd_elf,hash)
#define elf_new_section_hook NAME(bfd_elf,new_section_hook)
#define write_relocs NAME(bfd_elf,_write_relocs)
+#define elf_find_section NAME(bfd_elf,find_section)
+#define elf_bfd_link_add_symbols NAME(bfd_elf,bfd_link_add_symbols)
+#define elf_add_dynamic_entry NAME(bfd_elf,add_dynamic_entry)
+#define elf_bfd_final_link NAME(bfd_elf,bfd_final_link)
#if ARCH_SIZE == 64
#define ELF_R_INFO(X,Y) ELF64_R_INFO(X,Y)
#define ELF_R_SYM(X) ELF64_R_SYM(X)
+#define ELF_R_TYPE(X) ELF64_R_TYPE(X)
#define ELFCLASS ELFCLASS64
+#define FILE_ALIGN 8
+#define LOG_FILE_ALIGN 3
#endif
#if ARCH_SIZE == 32
#define ELF_R_INFO(X,Y) ELF32_R_INFO(X,Y)
#define ELF_R_SYM(X) ELF32_R_SYM(X)
+#define ELF_R_TYPE(X) ELF32_R_TYPE(X)
#define ELFCLASS ELFCLASS32
+#define FILE_ALIGN 4
+#define LOG_FILE_ALIGN 2
#endif
-static int shstrtab_length_fixed;
-
-struct elf_sect_data {
- int reloc_sec;
- /* more? */
-};
-
/* Forward declarations of static functions */
-static struct sec * section_from_elf_index PARAMS ((bfd *, int));
+static unsigned long bfd_add_to_strtab
+ PARAMS ((bfd *, struct strtab *, const char *));
+static asection *section_from_elf_index PARAMS ((bfd *, unsigned int));
static int elf_section_from_bfd_section PARAMS ((bfd *, struct sec *));
-static boolean elf_slurp_symbol_table PARAMS ((bfd *, asymbol **));
+static long elf_slurp_symbol_table PARAMS ((bfd *, asymbol **, boolean));
static int elf_symbol_from_bfd_symbol PARAMS ((bfd *,
- struct symbol_cache_entry **));
-
-static void elf_map_symbols PARAMS ((bfd *));
-static void swap_out_syms PARAMS ((bfd *));
+ struct symbol_cache_entry **));
+
+static boolean elf_compute_section_file_positions
+ PARAMS ((bfd *, struct bfd_link_info *));
+static boolean prep_headers PARAMS ((bfd *));
+static boolean assign_section_numbers PARAMS ((bfd *));
+static file_ptr align_file_position PARAMS ((file_ptr));
+static file_ptr assign_file_position_for_section
+ PARAMS ((Elf_Internal_Shdr *, file_ptr, boolean));
+static boolean assign_file_positions_except_relocs PARAMS ((bfd *, boolean));
+static void assign_file_positions_for_relocs PARAMS ((bfd *));
+static bfd_size_type get_program_header_size PARAMS ((bfd *));
+static file_ptr map_program_segments
+ PARAMS ((bfd *, file_ptr, Elf_Internal_Shdr *, bfd_size_type));
+
+static boolean elf_map_symbols PARAMS ((bfd *));
+static boolean swap_out_syms PARAMS ((bfd *));
+
+static boolean bfd_section_from_shdr PARAMS ((bfd *, unsigned int shindex));
#ifdef DEBUG
static void elf_debug_section PARAMS ((char *, int, Elf_Internal_Shdr *));
#define elf_string_from_elf_strtab(abfd,strindex) \
elf_string_from_elf_section(abfd,elf_elfheader(abfd)->e_shstrndx,strindex)
-
\f
+
/* Structure swapping routines */
/* Should perhaps use put_offset, put_word, etc. For now, the two versions
format. */
static void
-DEFUN (elf_swap_symbol_in, (abfd, src, dst),
- bfd * abfd AND
- Elf_External_Sym * src AND
- Elf_Internal_Sym * dst)
+elf_swap_symbol_in (abfd, src, dst)
+ bfd *abfd;
+ Elf_External_Sym *src;
+ Elf_Internal_Sym *dst;
{
dst->st_name = bfd_h_get_32 (abfd, (bfd_byte *) src->st_name);
dst->st_value = get_word (abfd, (bfd_byte *) src->st_value);
format. */
static void
-DEFUN (elf_swap_symbol_out, (abfd, src, dst),
- bfd * abfd AND
- Elf_Internal_Sym * src AND
- Elf_External_Sym * dst)
+elf_swap_symbol_out (abfd, src, dst)
+ bfd *abfd;
+ Elf_Internal_Sym *src;
+ Elf_External_Sym *dst;
{
bfd_h_put_32 (abfd, src->st_name, dst->st_name);
put_word (abfd, src->st_value, dst->st_value);
internal format. */
static void
-DEFUN (elf_swap_ehdr_in, (abfd, src, dst),
- bfd * abfd AND
- Elf_External_Ehdr * src AND
- Elf_Internal_Ehdr * dst)
+elf_swap_ehdr_in (abfd, src, dst)
+ bfd *abfd;
+ Elf_External_Ehdr *src;
+ Elf_Internal_Ehdr *dst;
{
memcpy (dst->e_ident, src->e_ident, EI_NIDENT);
dst->e_type = bfd_h_get_16 (abfd, (bfd_byte *) src->e_type);
external format. */
static void
-DEFUN (elf_swap_ehdr_out, (abfd, src, dst),
- bfd * abfd AND
- Elf_Internal_Ehdr * src AND
- Elf_External_Ehdr * dst)
+elf_swap_ehdr_out (abfd, src, dst)
+ bfd *abfd;
+ Elf_Internal_Ehdr *src;
+ Elf_External_Ehdr *dst;
{
memcpy (dst->e_ident, src->e_ident, EI_NIDENT);
/* note that all elements of dst are *arrays of unsigned char* already... */
ELF section header table entry in internal format. */
static void
-DEFUN (elf_swap_shdr_in, (abfd, src, dst),
- bfd * abfd AND
- Elf_External_Shdr * src AND
- Elf_Internal_Shdr * dst)
+elf_swap_shdr_in (abfd, src, dst)
+ bfd *abfd;
+ Elf_External_Shdr *src;
+ Elf_Internal_Shdr *dst;
{
dst->sh_name = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_name);
dst->sh_type = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_type);
ELF section header table entry in external format. */
static void
-DEFUN (elf_swap_shdr_out, (abfd, src, dst),
- bfd * abfd AND
- Elf_Internal_Shdr * src AND
- Elf_External_Shdr * dst)
+elf_swap_shdr_out (abfd, src, dst)
+ bfd *abfd;
+ Elf_Internal_Shdr *src;
+ Elf_External_Shdr *dst;
{
/* note that all elements of dst are *arrays of unsigned char* already... */
bfd_h_put_32 (abfd, src->sh_name, dst->sh_name);
ELF program header table entry in internal format. */
static void
-DEFUN (elf_swap_phdr_in, (abfd, src, dst),
- bfd * abfd AND
- Elf_External_Phdr * src AND
- Elf_Internal_Phdr * dst)
+elf_swap_phdr_in (abfd, src, dst)
+ bfd *abfd;
+ Elf_External_Phdr *src;
+ Elf_Internal_Phdr *dst;
{
dst->p_type = bfd_h_get_32 (abfd, (bfd_byte *) src->p_type);
dst->p_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->p_flags);
}
static void
-DEFUN (elf_swap_phdr_out, (abfd, src, dst),
- bfd * abfd AND
- Elf_Internal_Phdr * src AND
- Elf_External_Phdr * dst)
+elf_swap_phdr_out (abfd, src, dst)
+ bfd *abfd;
+ Elf_Internal_Phdr *src;
+ Elf_External_Phdr *dst;
{
/* note that all elements of dst are *arrays of unsigned char* already... */
bfd_h_put_32 (abfd, src->p_type, dst->p_type);
}
/* Translate an ELF reloc from external format to internal format. */
-static INLINE void
-DEFUN (elf_swap_reloc_in, (abfd, src, dst),
- bfd * abfd AND
- Elf_External_Rel * src AND
- Elf_Internal_Rel * dst)
+INLINE void
+elf_swap_reloc_in (abfd, src, dst)
+ bfd *abfd;
+ Elf_External_Rel *src;
+ Elf_Internal_Rel *dst;
{
dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset);
dst->r_info = get_word (abfd, (bfd_byte *) src->r_info);
}
-static INLINE void
-DEFUN (elf_swap_reloca_in, (abfd, src, dst),
- bfd * abfd AND
- Elf_External_Rela * src AND
- Elf_Internal_Rela * dst)
+INLINE void
+elf_swap_reloca_in (abfd, src, dst)
+ bfd *abfd;
+ Elf_External_Rela *src;
+ Elf_Internal_Rela *dst;
{
dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset);
dst->r_info = get_word (abfd, (bfd_byte *) src->r_info);
}
/* Translate an ELF reloc from internal format to external format. */
-static INLINE void
-DEFUN (elf_swap_reloc_out, (abfd, src, dst),
- bfd * abfd AND
- Elf_Internal_Rel * src AND
- Elf_External_Rel * dst)
+INLINE void
+elf_swap_reloc_out (abfd, src, dst)
+ bfd *abfd;
+ Elf_Internal_Rel *src;
+ Elf_External_Rel *dst;
{
put_word (abfd, src->r_offset, dst->r_offset);
put_word (abfd, src->r_info, dst->r_info);
}
-static INLINE void
-DEFUN (elf_swap_reloca_out, (abfd, src, dst),
- bfd * abfd AND
- Elf_Internal_Rela * src AND
- Elf_External_Rela * dst)
+INLINE void
+elf_swap_reloca_out (abfd, src, dst)
+ bfd *abfd;
+ Elf_Internal_Rela *src;
+ Elf_External_Rela *dst;
{
put_word (abfd, src->r_offset, dst->r_offset);
put_word (abfd, src->r_info, dst->r_info);
put_word (abfd, src->r_addend, dst->r_addend);
}
-\f
+INLINE void
+elf_swap_dyn_in (abfd, src, dst)
+ bfd *abfd;
+ const Elf_External_Dyn *src;
+ Elf_Internal_Dyn *dst;
+{
+ dst->d_tag = get_word (abfd, src->d_tag);
+ dst->d_un.d_val = get_word (abfd, src->d_un.d_val);
+}
+INLINE void
+elf_swap_dyn_out (abfd, src, dst)
+ bfd *abfd;
+ const Elf_Internal_Dyn *src;
+ Elf_External_Dyn *dst;
+{
+ put_word (abfd, src->d_tag, dst->d_tag);
+ put_word (abfd, src->d_un.d_val, dst->d_un.d_val);
+}
+\f
/* String table creation/manipulation routines */
static struct strtab *
-DEFUN (bfd_new_strtab, (abfd),
- bfd * abfd)
+bfd_new_strtab (abfd)
+ bfd *abfd;
{
struct strtab *ss;
- ss = (struct strtab *) bfd_xmalloc (sizeof (struct strtab));
- ss->tab = bfd_xmalloc (1);
- BFD_ASSERT (ss->tab != 0);
+ ss = (struct strtab *) malloc (sizeof (struct strtab));
+ if (!ss)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return NULL;
+ }
+ ss->tab = malloc (1);
+ if (!ss->tab)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return NULL;
+ }
*ss->tab = 0;
ss->nentries = 0;
ss->length = 1;
return ss;
}
-static int
-DEFUN (bfd_add_to_strtab, (abfd, ss, str),
- bfd * abfd AND
- struct strtab *ss AND
- CONST char *str)
+static unsigned long
+bfd_add_to_strtab (abfd, ss, str)
+ bfd *abfd;
+ struct strtab *ss;
+ const char *str;
{
/* should search first, but for now: */
/* include the trailing NUL */
int ln = strlen (str) + 1;
- /* should this be using obstacks? */
+ /* FIXME: This is slow. Also, we could combine this with the a.out
+ string table building and use a hash table, although it might not
+ be worth it since ELF symbols don't include debugging information
+ and thus have much less overlap. */
ss->tab = realloc (ss->tab, ss->length + ln);
+ if (ss->tab == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return (unsigned long) -1;
+ }
- BFD_ASSERT (ss->tab != 0);
strcpy (ss->tab + ss->length, str);
ss->nentries++;
ss->length += ln;
}
static int
-DEFUN (bfd_add_2_to_strtab, (abfd, ss, str, str2),
- bfd * abfd AND
- struct strtab *ss AND
- char *str AND
- CONST char *str2)
+bfd_add_2_to_strtab (abfd, ss, str, str2)
+ bfd *abfd;
+ struct strtab *ss;
+ char *str;
+ CONST char *str2;
{
/* should search first, but for now: */
/* include the trailing NUL */
if (ss->length)
ss->tab = realloc (ss->tab, ss->length + ln);
else
- ss->tab = bfd_xmalloc (ln);
+ ss->tab = malloc (ln);
- BFD_ASSERT (ss->tab != 0);
+ BFD_ASSERT (ss->tab != 0); /* FIXME */
strcpy (ss->tab + ss->length, str);
strcpy (ss->tab + ss->length + strlen (str), str2);
ss->nentries++;
return ss->length - ln;
}
-
\f
/* ELF .o/exec file reading */
/* Create a new bfd section from an ELF section header. */
static boolean
-DEFUN (bfd_section_from_shdr, (abfd, shindex),
- bfd * abfd AND
- unsigned int shindex)
+bfd_section_from_shdr (abfd, shindex)
+ bfd *abfd;
+ unsigned int shindex;
{
Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
- asection *newsect;
char *name;
name = elf_string_from_elf_strtab (abfd, hdr->sh_name);
switch (hdr->sh_type)
{
-
case SHT_NULL:
- /* inactive section. Throw it away. */
- return true;
-
- case SHT_PROGBITS:
- /* Bits that get saved. This one is real. */
- if (!hdr->rawdata)
- {
- newsect = bfd_make_section (abfd, name);
- if (newsect != NULL)
- {
- newsect->filepos = hdr->sh_offset; /* so we can read back the bits */
- newsect->flags |= SEC_HAS_CONTENTS;
- newsect->vma = hdr->sh_addr;
- newsect->_raw_size = hdr->sh_size;
- newsect->alignment_power = bfd_log2 (hdr->sh_addralign);
-
- if (hdr->sh_flags & SHF_ALLOC)
- {
- newsect->flags |= SEC_ALLOC;
- newsect->flags |= SEC_LOAD;
- }
-
- if (!(hdr->sh_flags & SHF_WRITE))
- newsect->flags |= SEC_READONLY;
-
- if (hdr->sh_flags & SHF_EXECINSTR)
- newsect->flags |= SEC_CODE; /* FIXME: may only contain SOME code */
- else
- newsect->flags |= SEC_DATA;
-
- hdr->rawdata = (void *) newsect;
- }
- else
- hdr->rawdata = (void *) bfd_get_section_by_name (abfd, name);
- }
+ /* Inactive section. Throw it away. */
return true;
- case SHT_NOBITS:
- /* Bits that get saved. This one is real. */
- if (!hdr->rawdata)
- {
- newsect = bfd_make_section (abfd, name);
- if (newsect != NULL)
- {
- newsect->vma = hdr->sh_addr;
- newsect->_raw_size = hdr->sh_size;
- newsect->filepos = hdr->sh_offset; /* fake */
- newsect->alignment_power = bfd_log2 (hdr->sh_addralign);
- if (hdr->sh_flags & SHF_ALLOC)
- newsect->flags |= SEC_ALLOC;
-
- if (!(hdr->sh_flags & SHF_WRITE))
- newsect->flags |= SEC_READONLY;
-
- if (hdr->sh_flags & SHF_EXECINSTR)
- newsect->flags |= SEC_CODE; /* FIXME: may only contain SOME code */
- else
- newsect->flags |= SEC_DATA;
-
- hdr->rawdata = (void *) newsect;
- }
- }
- return true;
+ case SHT_PROGBITS: /* Normal section with contents. */
+ case SHT_DYNAMIC: /* Dynamic linking information. */
+ case SHT_NOBITS: /* .bss section. */
+ return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
case SHT_SYMTAB: /* A symbol table */
if (elf_onesymtab (abfd) == shindex)
BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym));
BFD_ASSERT (elf_onesymtab (abfd) == 0);
elf_onesymtab (abfd) = shindex;
- elf_tdata(abfd)->symtab_hdr = *hdr;
- elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->symtab_hdr;
+ elf_tdata (abfd)->symtab_hdr = *hdr;
+ elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_hdr;
+ abfd->flags |= HAS_SYMS;
+ return true;
+
+ case SHT_DYNSYM: /* A dynamic symbol table */
+ if (elf_dynsymtab (abfd) == shindex)
+ return true;
+
+ BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym));
+ BFD_ASSERT (elf_dynsymtab (abfd) == 0);
+ elf_dynsymtab (abfd) = shindex;
+ elf_tdata (abfd)->dynsymtab_hdr = *hdr;
+ elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->dynsymtab_hdr;
abfd->flags |= HAS_SYMS;
return true;
case SHT_STRTAB: /* A string table */
- if (hdr->rawdata)
+ if (hdr->rawdata != NULL)
return true;
if (ehdr->e_shstrndx == shindex)
{
- elf_tdata(abfd)->shstrtab_hdr = *hdr;
- elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->shstrtab_hdr;
- hdr->rawdata = (PTR) &elf_tdata(abfd)->shstrtab_hdr;
+ elf_tdata (abfd)->shstrtab_hdr = *hdr;
+ elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
+ hdr->rawdata = (PTR) & elf_tdata (abfd)->shstrtab_hdr;
return true;
}
{
- int i;
+ unsigned int i;
for (i = 1; i < ehdr->e_shnum; i++)
{
- Elf_Internal_Shdr *hdr2 = elf_elfsections(abfd)[i];
+ Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
if (hdr2->sh_link == shindex)
{
- bfd_section_from_shdr (abfd, i);
+ if (! bfd_section_from_shdr (abfd, i))
+ return false;
if (elf_onesymtab (abfd) == i)
{
- elf_tdata(abfd)->strtab_hdr = *hdr;
- elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->strtab_hdr;
+ elf_tdata (abfd)->strtab_hdr = *hdr;
+ elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
+ return true;
+ }
+ if (elf_dynsymtab (abfd) == i)
+ {
+ elf_tdata (abfd)->dynstrtab_hdr = *hdr;
+ elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->dynstrtab_hdr;
return true;
}
#if 0 /* Not handling other string tables specially right now. */
- hdr2 = elf_elfsections(abfd)[i]; /* in case it moved */
+ hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */
/* We have a strtab for some random other section. */
newsect = (asection *) hdr2->rawdata;
if (!newsect)
hdr->rawdata = (PTR) newsect;
hdr2 = &elf_section_data (newsect)->str_hdr;
*hdr2 = *hdr;
- elf_elfsections(abfd)[shindex] = hdr2;
+ elf_elfsections (abfd)[shindex] = hdr2;
#endif
}
}
}
- newsect = bfd_make_section (abfd, name);
- if (newsect)
- {
- newsect->flags = SEC_HAS_CONTENTS;
- hdr->rawdata = (PTR) newsect;
- newsect->_raw_size = hdr->sh_size;
- newsect->alignment_power = 0;
- newsect->vma = 0;
-
- if (hdr->sh_flags & SHF_ALLOC)
- newsect->flags |= SEC_ALLOC|SEC_LOAD;
- if (!(hdr->sh_flags & SHF_WRITE))
- newsect->flags |= SEC_READONLY;
- if (hdr->sh_flags & SHF_EXECINSTR)
- newsect->flags |= SEC_CODE;
- else
- newsect->flags |= SEC_DATA;
- }
-
- return true;
+ return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
case SHT_REL:
case SHT_RELA:
- /* *These* do a lot of work -- but build no sections!
- The spec says there can be multiple strtabs, but only one symtab,
- but there can be lots of REL* sections. */
- /* FIXME: The above statement is wrong! There are typically at least
- two symbol tables in a dynamically linked executable, ".dynsym"
- which is the dynamic linkage symbol table and ".symtab", which is
- the "traditional" symbol table. -fnf */
-
+ /* *These* do a lot of work -- but build no sections! */
{
asection *target_sect;
Elf_Internal_Shdr *hdr2;
int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
+ /* Get the symbol table. */
+ if (! bfd_section_from_shdr (abfd, hdr->sh_link))
+ return false;
+
+ /* If this reloc section does not use the main symbol table,
+ or if it is in the process image, we don't treat it as a
+ reloc section. BFD can't adequately represent such a
+ section, so at least for now, we don't try. We just
+ present it as a normal section. */
+ if ((hdr->sh_flags & SHF_ALLOC) != 0
+ || hdr->sh_link != elf_onesymtab (abfd))
+ return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
+
/* Don't allow REL relocations on a machine that uses RELA and
vice versa. */
/* @@ Actually, the generic ABI does suggest that both might be
each of those architectures. It's conceivable that, e.g., a
bunch of absolute 32-bit relocs might be more compact in REL
form even on a RELA machine... */
- BFD_ASSERT (!(use_rela_p && (hdr->sh_type == SHT_REL)));
- BFD_ASSERT (!(!use_rela_p && (hdr->sh_type == SHT_RELA)));
- BFD_ASSERT (hdr->sh_entsize ==
- (use_rela_p
- ? sizeof (Elf_External_Rela)
- : sizeof (Elf_External_Rel)));
-
- bfd_section_from_shdr (abfd, hdr->sh_info); /* target */
- bfd_section_from_shdr (abfd, hdr->sh_link); /* symbol table */
+ BFD_ASSERT (use_rela_p
+ ? (hdr->sh_type == SHT_RELA
+ && hdr->sh_entsize == sizeof (Elf_External_Rela))
+ : (hdr->sh_type == SHT_REL
+ && hdr->sh_entsize == sizeof (Elf_External_Rel)));
+
+ if (! bfd_section_from_shdr (abfd, hdr->sh_info))
+ return false;
target_sect = section_from_elf_index (abfd, hdr->sh_info);
- if (target_sect == NULL)
+ if (target_sect == NULL
+ || elf_section_data (target_sect) == NULL)
return false;
hdr2 = &elf_section_data (target_sect)->rel_hdr;
*hdr2 = *hdr;
- elf_elfsections(abfd)[shindex] = hdr2;
+ elf_elfsections (abfd)[shindex] = hdr2;
target_sect->reloc_count = hdr->sh_size / hdr->sh_entsize;
target_sect->flags |= SEC_RELOC;
- target_sect->relocation = 0;
+ target_sect->relocation = NULL;
target_sect->rel_filepos = hdr->sh_offset;
abfd->flags |= HAS_RELOC;
return true;
break;
case SHT_HASH:
- case SHT_DYNAMIC:
- case SHT_DYNSYM: /* could treat this like symtab... */
#if 0
fprintf (stderr, "Dynamic Linking sections not yet supported.\n");
BFD_FAIL ();
return true;
default:
+ /* Check for any processor-specific section types. */
+ {
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+
+ if (bed->elf_backend_section_from_shdr)
+ (*bed->elf_backend_section_from_shdr) (abfd, hdr, name);
+ }
break;
}
}
boolean
-DEFUN (elf_new_section_hook, (abfd, sec),
- bfd *abfd
- AND asection *sec)
+elf_new_section_hook (abfd, sec)
+ bfd *abfd
+ ;
+ asection *sec;
{
struct bfd_elf_section_data *sdata;
sdata = (struct bfd_elf_section_data *) bfd_alloc (abfd, sizeof (*sdata));
+ if (!sdata)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
sec->used_by_bfd = (PTR) sdata;
memset (sdata, 0, sizeof (*sdata));
return true;
*/
static boolean
-DEFUN (bfd_section_from_phdr, (abfd, hdr, index),
- bfd * abfd AND
- Elf_Internal_Phdr * hdr AND
- int index)
+bfd_section_from_phdr (abfd, hdr, index)
+ bfd *abfd;
+ Elf_Internal_Phdr *hdr;
+ int index;
{
asection *newsect;
char *name;
(hdr->p_memsz > hdr->p_filesz));
sprintf (namebuf, split ? "segment%da" : "segment%d", index);
name = bfd_alloc (abfd, strlen (namebuf) + 1);
+ if (!name)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
strcpy (name, namebuf);
newsect = bfd_make_section (abfd, name);
+ if (newsect == NULL)
+ return false;
newsect->vma = hdr->p_vaddr;
newsect->_raw_size = hdr->p_filesz;
newsect->filepos = hdr->p_offset;
{
sprintf (namebuf, "segment%db", index);
name = bfd_alloc (abfd, strlen (namebuf) + 1);
+ if (!name)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
strcpy (name, namebuf);
newsect = bfd_make_section (abfd, name);
+ if (newsect == NULL)
+ return false;
newsect->vma = hdr->p_vaddr + hdr->p_filesz;
newsect->_raw_size = hdr->p_memsz - hdr->p_filesz;
if (hdr->p_type == PT_LOAD)
the magic number. */
static INLINE boolean
-DEFUN (elf_file_p, (x_ehdrp), Elf_External_Ehdr * x_ehdrp)
+elf_file_p (x_ehdrp)
+ Elf_External_Ehdr *x_ehdrp;
{
return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0)
&& (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1)
&& (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3));
}
+/* Check to see if the file associated with ABFD matches the target vector
+ that ABFD points to.
+
+ Note that we may be called several times with the same ABFD, but different
+ target vectors, most of which will not match. We have to avoid leaving
+ any side effects in ABFD, or any data it points to (like tdata), if the
+ file does not match the target vector. */
+
bfd_target *
-DEFUN (elf_object_p, (abfd), bfd * abfd)
+elf_object_p (abfd)
+ bfd *abfd;
{
Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
Elf_External_Shdr x_shdr; /* Section header table entry, external form */
- Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */
- int shindex;
+ Elf_Internal_Shdr *i_shdrp = NULL; /* Section header table, internal form */
+ unsigned int shindex;
char *shstrtab; /* Internal copy of section header stringtab */
- struct elf_backend_data *ebd; /* Use to get ELF_ARCH stored in xvec */
+ struct elf_backend_data *ebd;
+ struct elf_obj_tdata *preserved_tdata = elf_tdata (abfd);
+ struct elf_obj_tdata *new_tdata = NULL;
/* Read in the ELF header in external format. */
if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr))
{
- bfd_error = system_call_error;
- return NULL;
+ if (bfd_get_error () != bfd_error_system_call)
+ goto got_wrong_format_error;
+ else
+ goto got_no_match;
}
/* Now check to see if we have a valid ELF file, and one that BFD can
section header table (FIXME: See comments re sections at top of this
file). */
- if (elf_file_p (&x_ehdr) == false)
- {
- wrong:
- bfd_error = wrong_format;
- return NULL;
- }
-
- if (x_ehdr.e_ident[EI_VERSION] != EV_CURRENT)
- goto wrong;
-
- if (x_ehdr.e_ident[EI_CLASS] != ELFCLASS)
- goto wrong;
+ if ((elf_file_p (&x_ehdr) == false) ||
+ (x_ehdr.e_ident[EI_VERSION] != EV_CURRENT) ||
+ (x_ehdr.e_ident[EI_CLASS] != ELFCLASS))
+ goto got_wrong_format_error;
- /* Switch xvec to match the specified byte order. */
+ /* Check that file's byte order matches xvec's */
switch (x_ehdr.e_ident[EI_DATA])
{
case ELFDATA2MSB: /* Big-endian */
if (!abfd->xvec->header_byteorder_big_p)
- goto wrong;
+ goto got_wrong_format_error;
break;
case ELFDATA2LSB: /* Little-endian */
if (abfd->xvec->header_byteorder_big_p)
- goto wrong;
+ goto got_wrong_format_error;
break;
case ELFDATANONE: /* No data encoding specified */
default: /* Unknown data encoding specified */
- goto wrong;
+ goto got_wrong_format_error;
}
/* Allocate an instance of the elf_obj_tdata structure and hook it up to
- the tdata pointer in the bfd. */
-
- if (NULL == (elf_tdata (abfd) = (struct elf_obj_tdata *)
- bfd_zalloc (abfd, sizeof (struct elf_obj_tdata))))
- {
- bfd_error = no_memory;
- return NULL;
- }
+ the tdata pointer in the bfd. */
- /* FIXME: Any `wrong' exits below here will leak memory (tdata). */
+ new_tdata = ((struct elf_obj_tdata *)
+ bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)));
+ if (new_tdata == NULL)
+ goto got_no_memory_error;
+ elf_tdata (abfd) = new_tdata;
/* Now that we know the byte order, swap in the rest of the header */
i_ehdrp = elf_elfheader (abfd);
/* If there is no section header table, we're hosed. */
if (i_ehdrp->e_shoff == 0)
- goto wrong;
-
- if (i_ehdrp->e_type == ET_EXEC || i_ehdrp->e_type == ET_DYN)
- abfd->flags |= EXEC_P;
+ goto got_wrong_format_error;
- /* Retrieve the architecture information from the xvec and verify
- that it matches the machine info stored in the ELF header.
- This allows us to resolve ambiguous formats that might not
- otherwise be distinguishable. */
+ /* As a simple sanity check, verify that the what BFD thinks is the
+ size of each section header table entry actually matches the size
+ recorded in the file. */
+ if (i_ehdrp->e_shentsize != sizeof (x_shdr))
+ goto got_wrong_format_error;
ebd = get_elf_backend_data (abfd);
- /* Perhaps the elf architecture value should be another field in the
- elf backend data? If you change this to work that way, make sure
- that you still get bfd_arch_unknown for unknown architecture types,
- and that it still gets accepted by the `generic' elf target. */
- {
- int i;
- enum bfd_architecture arch = bfd_arch_unknown;
+ /* Check that the ELF e_machine field matches what this particular
+ BFD format expects. */
+ if (ebd->elf_machine_code != i_ehdrp->e_machine)
+ {
+ bfd_target **target_ptr;
- for (i = 0; i < bfd_elf_arch_map_size; i++)
- {
- if (bfd_elf_arch_map[i].elf_arch == i_ehdrp->e_machine)
- {
- arch = bfd_elf_arch_map[i].bfd_arch;
- break;
- }
- }
- /* start-sanitize-v9 */
- if (i_ehdrp->e_machine == EM_SPARC64)
- arch = bfd_arch_sparc;
- /* end-sanitize-v9 */
- if (ebd->arch != arch)
- goto wrong;
- bfd_default_set_arch_mach (abfd, arch, 0);
- }
+ if (ebd->elf_machine_code != EM_NONE)
+ goto got_wrong_format_error;
- /* Allocate space for a copy of the section header table in
- internal form, seek to the section header table in the file,
- read it in, and convert it to internal form. As a simple sanity
- check, verify that the what BFD thinks is the size of each section
- header table entry actually matches the size recorded in the file. */
+ /* This is the generic ELF target. Let it match any ELF target
+ for which we do not have a specific backend. */
+ for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++)
+ {
+ struct elf_backend_data *back;
- if (i_ehdrp->e_shentsize != sizeof (x_shdr))
- goto wrong;
- i_shdrp = (Elf_Internal_Shdr *)
- bfd_alloc (abfd, sizeof (*i_shdrp) * i_ehdrp->e_shnum);
- elf_elfsections (abfd) =
- (Elf_Internal_Shdr **) bfd_alloc (abfd, sizeof (i_shdrp) * i_ehdrp->e_shnum);
- if (!i_shdrp || !elf_elfsections(abfd))
- {
- bfd_error = no_memory;
- return NULL;
+ if ((*target_ptr)->flavour != bfd_target_elf_flavour)
+ continue;
+ back = (struct elf_backend_data *) (*target_ptr)->backend_data;
+ if (back->elf_machine_code == i_ehdrp->e_machine)
+ {
+ /* target_ptr is an ELF backend which matches this
+ object file, so reject the generic ELF target. */
+ goto got_wrong_format_error;
+ }
+ }
}
- if (bfd_seek (abfd, i_ehdrp->e_shoff, SEEK_SET) == -1)
+
+ /* Set the flags and architecture before calling the backend so that
+ it can override them. */
+ if (i_ehdrp->e_type == ET_EXEC)
+ abfd->flags |= EXEC_P;
+ else if (i_ehdrp->e_type == ET_DYN)
+ abfd->flags |= DYNAMIC;
+
+ if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0))
+ goto got_no_match;
+
+ /* Remember the entry point specified in the ELF file header. */
+ bfd_get_start_address (abfd) = i_ehdrp->e_entry;
+
+ /* Let the backend double check the format and override global
+ information. */
+ if (ebd->elf_backend_object_p)
{
- bfd_error = system_call_error;
- return NULL;
+ if ((*ebd->elf_backend_object_p) (abfd) == false)
+ goto got_wrong_format_error;
}
+
+ /* Allocate space for a copy of the section header table in
+ internal form, seek to the section header table in the file,
+ read it in, and convert it to internal form. */
+ i_shdrp = ((Elf_Internal_Shdr *)
+ bfd_alloc (abfd, sizeof (*i_shdrp) * i_ehdrp->e_shnum));
+ elf_elfsections (abfd) = ((Elf_Internal_Shdr **)
+ bfd_alloc (abfd,
+ sizeof (i_shdrp) * i_ehdrp->e_shnum));
+ if (!i_shdrp || !elf_elfsections (abfd))
+ goto got_no_memory_error;
+ if (bfd_seek (abfd, i_ehdrp->e_shoff, SEEK_SET) != 0)
+ goto got_no_match;
for (shindex = 0; shindex < i_ehdrp->e_shnum; shindex++)
{
- if (bfd_read ((PTR) & x_shdr, sizeof x_shdr, 1, abfd)
- != sizeof (x_shdr))
- {
- bfd_error = system_call_error;
- return NULL;
- }
+ if (bfd_read ((PTR) & x_shdr, sizeof x_shdr, 1, abfd) != sizeof (x_shdr))
+ goto got_no_match;
elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex);
- elf_elfsections(abfd)[shindex] = i_shdrp + shindex;
+ elf_elfsections (abfd)[shindex] = i_shdrp + shindex;
+
+ /* If this is a .dynamic section, mark the object file as being
+ dynamically linked. */
+ if (i_shdrp[shindex].sh_type == SHT_DYNAMIC)
+ abfd->flags |= DYNAMIC;
}
if (i_ehdrp->e_shstrndx)
{
- bfd_section_from_shdr (abfd, i_ehdrp->e_shstrndx);
- }
-
-#if 0
- for (shindex = i_ehdrp->e_shnum - 1; shindex >= 0; shindex--)
- {
- if (!strcmp (elf_string_from_elf_strtab (abfd,
- i_shdrp[shindex].sh_name),
- ".strtab"))
- {
- elf_tdata(abfd)->strtab_hdr = i_shdrp[shindex];
- elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->strtab_hdr;
- }
- else if (!strcmp (elf_string_from_elf_strtab (abfd,
- i_shdrp[shindex].sh_name),
- ".symtab"))
- {
- elf_tdata(abfd)->symtab_hdr = i_shdrp[shindex];
- elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->symtab_hdr;
- elf_onesymtab (abfd) = shindex;
- }
+ if (! bfd_section_from_shdr (abfd, i_ehdrp->e_shstrndx))
+ goto got_no_match;
}
-#endif
/* Read in the string table containing the names of the sections. We
will need the base pointer to this table later. */
shstrtab = elf_get_str_section (abfd, i_ehdrp->e_shstrndx);
if (!shstrtab)
- return NULL;
+ goto got_no_match;
/* Once all of the section headers have been read and converted, we
can start processing them. Note that the first section header is
- a dummy placeholder entry, so we ignore it.
-
- We also watch for the symbol table section and remember the file
- offset and section size for both the symbol table section and the
- associated string table section. */
+ a dummy placeholder entry, so we ignore it. */
for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++)
{
- bfd_section_from_shdr (abfd, shindex);
+ if (! bfd_section_from_shdr (abfd, shindex))
+ goto got_no_match;
}
- /* Remember the entry point specified in the ELF file header. */
-
- bfd_get_start_address (abfd) = i_ehdrp->e_entry;
-
- return abfd->xvec;
+ return (abfd->xvec);
+
+got_wrong_format_error:
+ bfd_set_error (bfd_error_wrong_format);
+ goto got_no_match;
+got_no_memory_error:
+ bfd_set_error (bfd_error_no_memory);
+ goto got_no_match;
+got_no_match:
+ if (new_tdata != NULL
+ && new_tdata->elf_sect_ptr != NULL)
+ bfd_release (abfd, new_tdata->elf_sect_ptr);
+ if (i_shdrp != NULL)
+ bfd_release (abfd, i_shdrp);
+ if (new_tdata != NULL)
+ bfd_release (abfd, new_tdata);
+ elf_tdata (abfd) = preserved_tdata;
+ return (NULL);
}
-
\f
-/* ELF .o/exec file writing */
-
-/* Create a new ELF section from a bfd section. */
-
-#if 0 /* not used */
-static boolean
-DEFUN (bfd_shdr_from_section, (abfd, hdr, shstrtab, indx),
- bfd * abfd AND
- Elf_Internal_Shdr * hdr AND
- struct strtab *shstrtab AND
- int indx)
-{
- asection *sect;
- int ndx;
-
- sect = abfd->sections;
- for (ndx = indx; --ndx;)
- {
- sect = sect->next;
- }
- hdr[indx].sh_name = bfd_add_to_strtab (abfd, shstrtab,
- bfd_section_name (abfd, sect));
- hdr[indx].sh_addr = sect->vma;
- hdr[indx].sh_size = sect->_raw_size;
- hdr[indx].sh_addralign = 1 << sect->alignment_power;
- hdr[indx].sh_flags = 0;
- /* these need to be preserved on */
- hdr[indx].sh_link = 0;
- hdr[indx].sh_info = 0;
- hdr[indx].sh_entsize = 0;
-
- hdr[indx].sh_type = 0;
- if (sect->flags & SEC_RELOC)
- {
- int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
- hdr[indx].sh_type = use_rela_p ? SHT_RELA : SHT_REL;
- }
- if (sect->flags & SEC_HAS_CONTENTS)
- {
- hdr[indx].sh_offset = sect->filepos;
- hdr[indx].sh_size = sect->_raw_size;
- }
- if (sect->flags & SEC_ALLOC)
- {
- hdr[indx].sh_flags |= SHF_ALLOC;
- if (sect->flags & SEC_LOAD)
- {
- /* do something with sh_type ? */
- }
- }
- if (!(sect->flags & SEC_READONLY))
- hdr[indx].sh_flags |= SHF_WRITE;
-
- if (sect->flags & SEC_CODE)
- hdr[indx].sh_flags |= SHF_EXECINSTR;
-
- return true;
-}
-#endif
+/* ELF .o/exec file writing */
-/*
- Takes a bfd and a symbol, returns a pointer to the elf specific area
- of the symbol if there is one.
- */
+/* Takes a bfd and a symbol, returns a pointer to the elf specific area
+ of the symbol if there is one. */
static INLINE elf_symbol_type *
-DEFUN (elf_symbol_from, (ignore_abfd, symbol),
- bfd * ignore_abfd AND
- asymbol * symbol)
+elf_symbol_from (ignore_abfd, symbol)
+ bfd *ignore_abfd;
+ asymbol *symbol;
{
if (symbol->the_bfd->xvec->flavour != bfd_target_elf_flavour)
return 0;
return (elf_symbol_type *) symbol;
}
-/*
- Create ELF output from BFD sections.
-
- Essentially, just create the section header and forget about the program
- header for now.
+/* Create ELF output from BFD sections.
-*/
+ Essentially, just create the section header and forget about the program
+ header for now. */
static void
-DEFUN (elf_make_sections, (abfd, asect, obj),
- bfd * abfd AND
- asection * asect AND
- PTR obj)
+elf_make_sections (abfd, asect, obj)
+ bfd *abfd;
+ asection *asect;
+ PTR obj;
{
/* most of what is in bfd_shdr_from_section goes in here... */
/* and all of these sections generate at *least* one ELF section. */
- int idx;
-
Elf_Internal_Shdr *this_hdr;
this_hdr = &elf_section_data (asect)->this_hdr;
{
/* emit a reloc section, and thus strtab and symtab... */
Elf_Internal_Shdr *rela_hdr;
- Elf_External_Rela *outbound_relocas;
- Elf_External_Rel *outbound_relocs;
int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
rela_hdr = &elf_section_data (asect)->rel_hdr;
rela_hdr->sh_flags = 0;
rela_hdr->sh_addr = 0;
rela_hdr->sh_offset = 0;
- rela_hdr->sh_addralign = 0;
+
+ /* FIXME: Systems I've checked use an alignment of 4, but it is
+ possible that some systems use a different alignment. */
+ rela_hdr->sh_addralign = 4;
+
rela_hdr->size = 0;
}
if (asect->flags & SEC_ALLOC)
/* @@ Do something with sh_type? */
}
}
+ else
+ {
+ /* If this section is not part of the program image during
+ execution, leave the address fields at 0. */
+ this_hdr->sh_addr = 0;
+ asect->vma = 0;
+ }
if (!(asect->flags & SEC_READONLY))
this_hdr->sh_flags |= SHF_WRITE;
int idx;
int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
asymbol *last_sym = 0;
- int last_sym_idx;
+ int last_sym_idx = 9999999; /* should always be written before use */
if ((sec->flags & SEC_RELOC) == 0)
return;
- /* Flags are sometimes inconsistent. */
+
+ /* The linker backend writes the relocs out itself, and sets the
+ reloc_count field to zero to inhibit writing them here. Also,
+ sometimes the SEC_RELOC flag gets set even when there aren't any
+ relocs. */
if (sec->reloc_count == 0)
return;
rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count;
rela_hdr->contents = (void *) bfd_alloc (abfd, rela_hdr->sh_size);
+ if (!rela_hdr->contents)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ abort (); /* FIXME */
+ }
/* orelocation has the data, reloc_count has the count... */
if (use_rela_p)
dst_rel.r_info = ELF_R_INFO (n, ptr->howto->type);
elf_swap_reloc_out (abfd, &dst_rel, src_rel);
-
- /* Update the addend -- FIXME add 64 bit support. */
- bfd_put_32 (abfd, ptr->addend,
- (unsigned char *) (elf_section_data (sec)->this_hdr.contents)
- + dst_rel.r_offset);
}
}
}
PTR obj;
{
Elf_Internal_Shdr *this_hdr = &elf_section_data (asect)->this_hdr;
- int this_idx = elf_section_data(asect)->this_idx;
+ int this_idx = elf_section_data (asect)->this_idx;
/* @@ Check flags! */
if (!strncmp (asect->name, ".stab", 5)
&& !strcmp ("str", asect->name + strlen (asect->name) - 3))
{
size_t len = strlen (asect->name) + 1;
- char *s = alloca (len);
+ char *s = (char *) malloc (len);
+ if (s == NULL)
+ /* FIXME: Should deal more gracefully with errors. */
+ abort ();
strcpy (s, asect->name);
s[len - 4] = 0;
asect = bfd_get_section_by_name (abfd, s);
+ free (s);
if (!asect)
abort ();
- elf_section_data(asect)->this_hdr.sh_link = this_idx;
-
+ elf_section_data (asect)->this_hdr.sh_link = this_idx;
/* @@ Assuming 32 bits! */
- this_hdr->sh_entsize = 0xc;
+ elf_section_data (asect)->this_hdr.sh_entsize = 0xc;
+
+ this_hdr->sh_type = SHT_STRTAB;
}
}
static void
-DEFUN (elf_fake_sections, (abfd, asect, obj),
- bfd * abfd AND
- asection * asect AND
- PTR obj)
+elf_fake_sections (abfd, asect, obj)
+ bfd *abfd;
+ asection *asect;
+ PTR obj;
{
/* most of what is in bfd_shdr_from_section goes in here... */
/* and all of these sections generate at *least* one ELF section. */
this_hdr = &elf_section_data (asect)->this_hdr;
this_hdr->sh_name =
bfd_add_to_strtab (abfd, elf_shstrtab (abfd), asect->name);
+ if (this_hdr->sh_name == (unsigned long) -1)
+ abort (); /* FIXME */
/* We need to log the type *now* so that elf_section_from_bfd_section
can find us... have to set rawdata too. */
this_hdr->rawdata = (void *) asect;
this_hdr->sh_addralign = 1 << asect->alignment_power;
- if ((asect->flags & SEC_ALLOC) && (asect->flags & SEC_LOAD))
+
+ /* FIXME: This should not be based on section names. */
+ if (strcmp (asect->name, ".dynstr") == 0)
+ this_hdr->sh_type = SHT_STRTAB;
+ else if (strcmp (asect->name, ".hash") == 0)
+ this_hdr->sh_type = SHT_HASH;
+ else if (strcmp (asect->name, ".dynsym") == 0)
+ this_hdr->sh_type = SHT_DYNSYM;
+ else if (strcmp (asect->name, ".dynamic") == 0)
+ this_hdr->sh_type = SHT_DYNAMIC;
+ else if (strncmp (asect->name, ".rel.", 5) == 0)
+ this_hdr->sh_type = SHT_REL;
+ else if (strncmp (asect->name, ".rela.", 6) == 0)
+ this_hdr->sh_type = SHT_RELA;
+ else if ((asect->flags & SEC_ALLOC) && (asect->flags & SEC_LOAD))
this_hdr->sh_type = SHT_PROGBITS;
- /* @@ Select conditions correctly! */
- else if (!strcmp (asect->name, ".bss"))
- this_hdr->sh_type = SHT_NOBITS;
+ else if ((asect->flags & SEC_ALLOC) && ((asect->flags & SEC_LOAD) == 0))
+ {
+ BFD_ASSERT (strcmp (asect->name, ".bss") == 0
+ || strcmp (asect->name, ".sbss") == 0);
+ this_hdr->sh_type = SHT_NOBITS;
+ }
+ /* FIXME I am not sure how to detect a .note section from the flags
+ word of an `asection'. */
+ else if (!strcmp (asect->name, ".note"))
+ this_hdr->sh_type = SHT_NOTE;
else
- /* what *do* we put here? */
this_hdr->sh_type = SHT_PROGBITS;
this_hdr->sh_flags = 0;
this_hdr->sh_offset = 0;
this_hdr->size = 0;
+ /* Now, check for processor-specific section types. */
+ {
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+
+ if (bed->elf_backend_fake_sections)
+ (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect);
+ }
+
{
/* Emit a strtab and symtab, and possibly a reloc section. */
Elf_Internal_Shdr *rela_hdr;
- Elf_Internal_Shdr *symstrtab_hdr;
/* Note that only one symtab is used, so just remember it
for now. */
rela_hdr->sh_addr = 0;
rela_hdr->sh_size = 0;
rela_hdr->sh_offset = 0;
- rela_hdr->sh_addralign = 0;
+
+ /* FIXME: Systems I've checked use an alignment of 4, but some
+ systems may use a different alignment. */
+ rela_hdr->sh_addralign = 4;
+
rela_hdr->size = 0;
}
}
this_hdr->sh_flags |= SHF_EXECINSTR;
}
-
-/*
-xxxINTERNAL_FUNCTION
- bfd_elf_locate_sh
-
-xxxSYNOPSIS
- struct elf_internal_shdr *bfd_elf_locate_sh (bfd *abfd,
- struct strtab *strtab,
- struct elf_internal_shdr *shdrp,
- CONST char *name);
-
-xxxDESCRIPTION
- Helper function to locate an ELF section header given the
- name of a BFD section.
-*/
-
-static struct elfNAME (internal_shdr) *
-DEFUN (elf_locate_sh, (abfd, strtab, shdrp, name),
- bfd * abfd AND
- struct strtab *strtab AND
- struct elfNAME (internal_shdr) *shdrp AND
- CONST char *name)
-{
- Elf_Internal_Shdr *gotit = NULL;
- int max, i;
-
- if (shdrp != NULL && strtab != NULL)
- {
- max = elf_elfheader (abfd)->e_shnum;
- for (i = 1; i < max; i++)
- {
- if (!strcmp (strtab->tab + shdrp[i].sh_name, name))
- {
- gotit = &shdrp[i];
- }
- }
- }
- return gotit;
-}
-
/* Map symbol from it's internal number to the external number, moving
all local symbols to be at the head of the list. */
static INLINE int
-sym_is_global (sym)
+sym_is_global (abfd, sym)
+ bfd *abfd;
asymbol *sym;
{
- if (sym->flags & BSF_GLOBAL)
+ /* If the backend has a special mapping, use it. */
+ if (get_elf_backend_data (abfd)->elf_backend_sym_is_global)
+ return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global)
+ (abfd, sym));
+
+ if (sym->flags & (BSF_GLOBAL | BSF_WEAK))
{
if (sym->flags & BSF_LOCAL)
abort ();
return 1;
}
- if (sym->section == &bfd_und_section)
+ if (sym->section == 0)
+ {
+ /* Is this valid? */
+ abort ();
+
+ return 1;
+ }
+ if (sym->section == &bfd_und_section)
return 1;
if (bfd_is_com_section (sym->section))
return 1;
return 0;
}
-static void
-DEFUN (elf_map_symbols, (abfd), bfd * abfd)
+static boolean
+elf_map_symbols (abfd)
+ bfd *abfd;
{
int symcount = bfd_get_symcount (abfd);
asymbol **syms = bfd_get_outsymbols (abfd);
+ asymbol **sect_syms;
int num_locals = 0;
int num_globals = 0;
int num_locals2 = 0;
int num_globals2 = 0;
+ int max_index = 0;
int num_sections = 0;
- int *symtab_map;
+ Elf_Sym_Extra *sym_extra;
int idx;
asection *asect;
fflush (stderr);
#endif
- /* Add local symbols for each allocated section
- FIXME -- we should only put out symbols for sections that
- are actually relocated against. */
+ /* Add local symbols for each section for which there are relocs.
+ FIXME: How can we tell which sections have relocs at this point?
+ Will reloc_count always be accurate? Actually, I think most ELF
+ targets create section symbols for all sections anyhow. */
+ for (asect = abfd->sections; asect; asect = asect->next)
+ {
+ if (max_index < asect->index)
+ max_index = asect->index;
+ }
+
+ max_index++;
+ elf_num_section_syms (abfd) = max_index;
+ sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *));
+ elf_section_syms (abfd) = sect_syms;
+
+ if (sect_syms == 0)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+
for (asect = abfd->sections; asect; asect = asect->next)
{
- if (/*asect->flags & (SEC_LOAD | SEC_DATA | SEC_CODE)*/1)
- num_sections++;
+ asymbol *sym = bfd_make_empty_symbol (abfd);
+ if (!sym)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ sym->the_bfd = abfd;
+ sym->name = asect->name;
+ sym->value = asect->vma;
+ sym->flags = BSF_SECTION_SYM;
+ sym->section = asect;
+ sect_syms[asect->index] = sym;
+ num_sections++;
+#ifdef DEBUG
+ fprintf (stderr,
+ "creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n",
+ asect->name, (long) asect->vma, asect->index, (long) asect);
+#endif
}
if (num_sections)
* sizeof (asymbol *)));
else
syms = (asymbol **) bfd_alloc (abfd,
- (num_sections + 1) * sizeof (asymbol *));
+ (num_sections + 1) * sizeof (asymbol *));
+ if (!syms)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
for (asect = abfd->sections; asect; asect = asect->next)
{
- if (/* asect->flags & (SEC_LOAD | SEC_DATA | SEC_CODE) */ 1)
- {
- asymbol *sym = syms[symcount++] = bfd_make_empty_symbol (abfd);
- sym->the_bfd = abfd;
- sym->name = asect->name;
- sym->value = asect->vma;
- sym->flags = BSF_SECTION_SYM;
- sym->section = asect;
- }
+ if (sect_syms[asect->index])
+ syms[symcount++] = sect_syms[asect->index];
}
syms[symcount] = (asymbol *) 0;
bfd_set_symtab (abfd, syms, symcount);
}
- elf_symtab_map (abfd) = symtab_map
- = (int *) bfd_alloc (abfd, symcount * sizeof (int *));
+ elf_sym_extra (abfd) = sym_extra
+ = (Elf_Sym_Extra *) bfd_alloc (abfd, symcount * sizeof (Elf_Sym_Extra));
+ if (!sym_extra)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
/* Identify and classify all of the symbols. */
for (idx = 0; idx < symcount; idx++)
{
- if (!sym_is_global (syms[idx]))
+ if (!sym_is_global (abfd, syms[idx]))
num_locals++;
else
num_globals++;
dummy symbol. */
for (idx = 0; idx < symcount; idx++)
{
- if (!sym_is_global (syms[idx]))
- symtab_map[idx] = 1 + num_locals2++;
+ syms[idx]->udata = (PTR) & sym_extra[idx];
+ if (!sym_is_global (abfd, syms[idx]))
+ sym_extra[idx].elf_sym_num = 1 + num_locals2++;
else
- symtab_map[idx] = 1 + num_locals + num_globals2++;
+ sym_extra[idx].elf_sym_num = 1 + num_locals + num_globals2++;
}
elf_num_locals (abfd) = num_locals;
elf_num_globals (abfd) = num_globals;
+ return true;
}
-static void assign_section_numbers ();
-static void assign_file_positions_except_relocs ();
+/* Compute the file positions we are going to put the sections at, and
+ otherwise prepare to begin writing out the ELF file. If LINK_INFO
+ is not NULL, this is being called by the ELF backend linker. */
static boolean
-DEFUN (elf_compute_section_file_positions, (abfd), bfd * abfd)
+elf_compute_section_file_positions (abfd, link_info)
+ bfd *abfd;
+ struct bfd_link_info *link_info;
{
- Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
- Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */
- struct strtab *shstrtab;
- int count, maxsections;
-
- bfd_map_over_sections (abfd, elf_fake_sections, 0);
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ Elf_Internal_Shdr *shstrtab_hdr;
- assign_section_numbers (abfd);
+ if (abfd->output_has_begun)
+ return true;
- bfd_map_over_sections (abfd, elf_make_sections, 0);
+ /* Do any elf backend specific processing first. */
+ if (bed->elf_backend_begin_write_processing)
+ (*bed->elf_backend_begin_write_processing) (abfd);
- bfd_map_over_sections (abfd, fix_up_strtabs, 0); /* .stab/.stabstr &c */
+ if (! prep_headers (abfd))
+ return false;
- swap_out_syms (abfd);
+ bfd_map_over_sections (abfd, elf_fake_sections, 0);
- assign_file_positions_except_relocs (abfd);
+ if (!assign_section_numbers (abfd))
+ return false;
- return true;
-}
+ bfd_map_over_sections (abfd, elf_make_sections, 0);
-static boolean
-DEFUN (elf_write_phdrs, (abfd, i_ehdrp, i_phdrp, phdr_cnt),
- bfd * abfd AND
- Elf_Internal_Ehdr * i_ehdrp AND
- Elf_Internal_Phdr * i_phdrp AND
- Elf32_Half phdr_cnt)
-{
- /* first program header entry goes after the file header */
- int outbase = i_ehdrp->e_phoff;
- int i;
- Elf_External_Phdr x_phdr;
+ bfd_map_over_sections (abfd, fix_up_strtabs, 0); /* .stab/.stabstr &c */
- for (i = 0; i < phdr_cnt; i++)
+ /* The backend linker builds symbol table information itself. */
+ if (link_info == NULL)
{
- elf_swap_phdr_out (abfd, i_phdrp + i, &x_phdr);
- bfd_seek (abfd, outbase, SEEK_SET);
- bfd_write ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd);
- outbase += sizeof (x_phdr);
+ if (! swap_out_syms (abfd))
+ return false;
}
- return true;
-}
-
-#if 0
-static Elf_Internal_Phdr *
-DEFUN (elf_build_phdrs, (abfd, i_ehdrp, i_shdrp, phdr_cnt),
- bfd * abfd AND
- Elf_Internal_Ehdr * i_ehdrp AND
- Elf_Internal_Shdr * i_shdrp AND
- Elf32_Half * phdr_cnt)
-{
- Elf_Internal_Phdr *phdr_buf;
- int idx;
- /* NOTES:
- 1. The program header table is *not* loaded as part
- of the memory image of the program. If this
- changes later, the PT_PHDR entry must come first.
- 2. there is currently no support for program header
- entries of type PT_PHDR, PT_DYNAMIC, PT_INTERP,
- or PT_SHLIB. */
-
- /* A. Figure out how many program header table entries are needed
- 1. PT_LOAD for the text segment
- 2. PT_LOAD for the data segment
- Then, reserve space for one more pointer. This will be NULL
- to indicate the end of the program header table. */
-
-#ifdef PHDRS_INCLUDED
- *phdr_cnt = 4;
-#else
- /* XXX right now, execve() expects exactly 3 PT entries on HPPA-OSF. */
- *phdr_cnt = 3;
-#endif
-
- phdr_buf = (Elf_Internal_Phdr *) bfd_xmalloc (((*phdr_cnt) + 1)
- *
- sizeof (Elf_Internal_Phdr));
-
- idx = 0;
-#ifdef PHDRS_INCLUDED
- /* B. Fill in the PT_PHDR entry. */
-
- idx++;
-#endif
-
- /* C. Fill in the PT_LOAD entry for the text segment. */
-
- phdr_buf[idx].p_type = PT_LOAD;
-
- /* get virtual/physical address from .text section */
- phdr_buf[idx].p_vaddr = bfd_get_section_by_name (abfd, ".text")->vma;
- phdr_buf[idx].p_paddr = 0; /* XXX */
-
- /* Ultimately, we would like the size of the .text load
- segment to be the sum of the following sections:
- the program header table itself
- .interp
- .hash
- .dynsym
- .dynstr
- .rela.bss
- .rela.plt
- .init
- .text
- .fini
- .rodata
- But, right now, it will be the sum of the following sections:
- .text
- .rodata */
-
- {
- static char *CONST ld_sect_names[] =
- {".text", ".rodata", NULL};
- int i;
- int ld_size = 0;
-
- for (i = 0; ld_sect_names[i]; i++)
- {
- asection *asect = bfd_get_section_by_name (abfd,
- ld_sect_names[i]);
-
- if (asect)
- ld_size += bfd_section_size (abfd, asect);
- }
- phdr_buf[idx].p_filesz = ld_size;
- /* XXX: need to fix this */
- phdr_buf[idx].p_memsz = ld_size;
- }
- phdr_buf[idx].p_flags = PF_R + PF_X;
- phdr_buf[idx].p_align =
- bfd_get_section_by_name (abfd, ".text")->alignment_power;
-
- idx++;
-
- /* D. Fill in the PT_LOAD entry for the data segment. */
-
- phdr_buf[idx].p_type = PT_LOAD;
-
- /* get virtual/physical address from .data section */
- phdr_buf[idx].p_vaddr = bfd_get_section_by_name (abfd, ".data")->vma;
- phdr_buf[idx].p_paddr = 0; /* XXX */
-
- /* Ultimately, we would like the size of the data load segment
- to be the sum of the following sections:
- the PT_DYNAMIC program header table entry
- .plt
- .data
- .data1
- .got
- .dynamic
- But, right now, it will be the sum of the following sections:
- .data */
-
- {
- static char *CONST ld_sect_names[] =
- {".data", NULL};
- int i;
- int ld_size = 0;
-
- for (i = 0; ld_sect_names[i]; i++)
- {
- asection *asect = bfd_get_section_by_name (abfd,
- ld_sect_names[i]);
-
- if (asect)
- ld_size += bfd_section_size (abfd, asect);
- }
- phdr_buf[idx].p_filesz = ld_size;
- /* XXX: need to fix this */
- phdr_buf[idx].p_memsz = ld_size;
- }
- phdr_buf[idx].p_flags = PF_R + PF_W + PF_X;
- phdr_buf[idx].p_align
- = bfd_get_section_by_name (abfd, ".data")->alignment_power;
-
- idx++;
-
- /* E. Fill in the PT_LOAD entry for the bss segment. */
-
- phdr_buf[idx].p_type = PT_LOAD;
-
- /* get virtual/physical address from .data section */
- phdr_buf[idx].p_vaddr = bfd_get_section_by_name (abfd, ".bss")->vma;
- phdr_buf[idx].p_paddr = 0; /* XXX */
-
- {
- static char *CONST ld_sect_names[] =
- {".bss", NULL};
- int i;
- int ld_size = 0;
-
- for (i = 0; ld_sect_names[i]; i++)
- {
- asection *asect = bfd_get_section_by_name (abfd,
- ld_sect_names[i]);
-
- if (asect)
- ld_size += bfd_section_size (abfd, asect);
- }
- phdr_buf[idx].p_filesz = 0;
- /* XXX: need to fix this */
- phdr_buf[idx].p_memsz = ld_size;
- }
- phdr_buf[idx].p_flags = PF_R + PF_W + PF_X;
- phdr_buf[idx].p_align
- = bfd_get_section_by_name (abfd, ".bss")->alignment_power;
-
- idx++;
-
- /* F. Set up the "end of program header table" sentinel. */
-
- memset ((char *) (phdr_buf + idx), 0, sizeof (Elf_Internal_Phdr));
- idx++;
+ shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
+ /* sh_name was set in prep_headers. */
+ shstrtab_hdr->sh_type = SHT_STRTAB;
+ shstrtab_hdr->sh_flags = 0;
+ shstrtab_hdr->sh_addr = 0;
+ shstrtab_hdr->sh_size = elf_shstrtab (abfd)->length;
+ shstrtab_hdr->sh_entsize = 0;
+ shstrtab_hdr->sh_link = 0;
+ shstrtab_hdr->sh_info = 0;
+ /* sh_offset is set in assign_file_positions_for_symtabs_and_strtabs. */
+ shstrtab_hdr->sh_addralign = 1;
+ shstrtab_hdr->contents = (PTR) elf_shstrtab (abfd)->tab;
+
+ if (!assign_file_positions_except_relocs (abfd,
+ link_info == NULL ? true : false))
+ return false;
- BFD_ASSERT (idx - 1 == *phdr_cnt);
+ abfd->output_has_begun = true;
- return phdr_buf;
+ return true;
}
-#endif
-static const Elf_Internal_Shdr null_shdr;
/* Assign all ELF section numbers. The dummy first section is handled here
too. The link/info pointers for the standard section types are filled
in here too, while we're at it. (Link pointers for .stab sections are
not filled in here.) */
-static void
+static boolean
assign_section_numbers (abfd)
bfd *abfd;
{
int i;
Elf_Internal_Shdr **i_shdrp;
- t->shstrtab_hdr.sh_size = elf_shstrtab(abfd)->length;
- t->shstrtab_hdr.contents = (void *) elf_shstrtab(abfd)->tab;
- shstrtab_length_fixed = 1;
+ t->shstrtab_hdr.sh_size = elf_shstrtab (abfd)->length;
+ t->shstrtab_hdr.contents = (void *) elf_shstrtab (abfd)->tab;
t->shstrtab_section = section_number++;
- elf_elfheader(abfd)->e_shstrndx = t->shstrtab_section;
+ elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
if (abfd->symcount)
{
t->symtab_section = section_number++;
d->rel_idx = 0;
/* No handling for per-section string tables currently. */
}
- elf_elfheader(abfd)->e_shnum = section_number;
+ elf_elfheader (abfd)->e_shnum = section_number;
/* Set up the list of section header pointers, in agreement with the
indices. */
- i_shdrp = (Elf_Internal_Shdr **)
- bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *));
- elf_elfsections(abfd) = i_shdrp;
- for (i = 0; i < section_number; i++)
- i_shdrp[i] = 0;
+ i_shdrp = ((Elf_Internal_Shdr **)
+ bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *)));
+ if (i_shdrp == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ i_shdrp[0] = ((Elf_Internal_Shdr *)
+ bfd_alloc (abfd, sizeof (Elf_Internal_Shdr)));
+ if (i_shdrp[0] == NULL)
+ {
+ bfd_release (abfd, i_shdrp);
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ elf_elfsections (abfd) = i_shdrp;
+ for (i = 1; i < section_number; i++)
+ i_shdrp[i] = NULL;
+ memset (i_shdrp[0], 0, sizeof (Elf_Internal_Shdr));
- i_shdrp[0] = (Elf_Internal_Shdr *) &null_shdr;
i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
if (abfd->symcount)
{
}
/* Make sure we got everything.... */
for (i = 0; i < section_number; i++)
- if (i_shdrp[i] == 0)
+ if (i_shdrp[i] == NULL)
abort ();
+ return true;
+}
+
+/* Align to the maximum file alignment that could be required for any
+ ELF data structure. */
+
+static INLINE file_ptr
+align_file_position (off)
+ file_ptr off;
+{
+ return (off + FILE_ALIGN - 1) & ~(FILE_ALIGN - 1);
}
+/* Assign a file position to a section, optionally aligning to the
+ required section alignment. */
+
static INLINE file_ptr
-assign_file_position_for_section (i_shdrp, offset)
+assign_file_position_for_section (i_shdrp, offset, align)
Elf_Internal_Shdr *i_shdrp;
file_ptr offset;
+ boolean align;
{
+ if (align)
+ {
+ unsigned int al;
+
+ al = i_shdrp->sh_addralign;
+ if (al > 1)
+ offset = BFD_ALIGN (offset, al);
+ }
i_shdrp->sh_offset = offset;
+ if (i_shdrp->rawdata != NULL)
+ ((asection *) i_shdrp->rawdata)->filepos = offset;
if (i_shdrp->sh_type != SHT_NOBITS)
offset += i_shdrp->sh_size;
return offset;
}
-static INLINE file_ptr
-assign_file_positions_for_symtab_and_strtabs (abfd, off)
+/* Get the size of the program header. This is called by the linker
+ before any of the section VMA's are set, so it can't calculate the
+ correct value for a strange memory layout. */
+
+static bfd_size_type
+get_program_header_size (abfd)
bfd *abfd;
- file_ptr off;
{
- struct elf_obj_tdata *t = elf_tdata (abfd);
+ size_t segs;
+ asection *s;
+
+ /* Assume we will need exactly two PT_LOAD segments: one for text
+ and one for data. */
+ segs = 2;
- off = assign_file_position_for_section (&t->shstrtab_hdr, off);
- off = assign_file_position_for_section (&t->symtab_hdr, off);
- off = assign_file_position_for_section (&t->strtab_hdr, off);
- return off;
+ s = bfd_get_section_by_name (abfd, ".interp");
+ if (s != NULL && (s->flags & SEC_LOAD) != 0)
+ {
+ /* If we have a loadable interpreter section, we need a
+ PT_INTERP segment. In this case, assume we also need a
+ PT_PHDR segment, although that may not be true for all
+ targets. */
+ segs += 2;
+ }
+
+ if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
+ {
+ /* We need a PT_DYNAMIC segment. */
+ ++segs;
+ }
+
+ return segs * sizeof (Elf_External_Phdr);
}
-struct seg_info {
- bfd_vma low, mem_size;
- file_ptr file_size;
- int start_pos;
- int sh_flags;
- struct seg_info *next;
-};
+/* Create the program header. OFF is the file offset where the
+ program header should be written. FIRST is the first loadable ELF
+ section. PHDR_SIZE is the size of the program header as returned
+ by get_program_header_size. */
-static void
-map_program_segments (abfd)
+static file_ptr
+map_program_segments (abfd, off, first, phdr_size)
bfd *abfd;
+ file_ptr off;
+ Elf_Internal_Shdr *first;
+ bfd_size_type phdr_size;
{
- Elf_Internal_Shdr **i_shdrpp = elf_elfsections (abfd);
- Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
- Elf_Internal_Shdr *i_shdrp;
+ Elf_Internal_Phdr phdrs[10];
+ unsigned int phdr_count;
Elf_Internal_Phdr *phdr;
- char *done;
- int i, n_left = 0;
- file_ptr lowest_offset = 0;
- struct seg_info *seg = 0;
+ int phdr_size_adjust;
+ unsigned int i;
+ Elf_Internal_Shdr **hdrpp;
+ asection *sinterp, *sdyn;
+ unsigned int last_type;
+ Elf_Internal_Ehdr *i_ehdrp;
+
+ BFD_ASSERT ((abfd->flags & EXEC_P) != 0);
+ BFD_ASSERT (phdr_size / sizeof (Elf_Internal_Phdr)
+ <= sizeof phdrs / sizeof (phdrs[0]));
+
+ phdr_count = 0;
+ phdr = phdrs;
+
+ phdr_size_adjust = 0;
+
+ /* If we have a loadable .interp section, we must create a PT_INTERP
+ segment which must precede all PT_LOAD segments. We assume that
+ we must also create a PT_PHDR segment, although that may not be
+ true for all targets. */
+ sinterp = bfd_get_section_by_name (abfd, ".interp");
+ if (sinterp != NULL && (sinterp->flags & SEC_LOAD) != 0)
+ {
+ BFD_ASSERT (first != NULL);
+
+ phdr->p_type = PT_PHDR;
+
+ phdr->p_offset = off;
+
+ /* Account for any adjustment made because of the alignment of
+ the first loadable section. */
+ phdr_size_adjust = (first->sh_offset - phdr_size) - off;
+ BFD_ASSERT (phdr_size_adjust >= 0 && phdr_size_adjust < 128);
+
+ /* The program header precedes all loadable sections. This lets
+ us compute its loadable address. This depends on the linker
+ script. */
+ phdr->p_vaddr = first->sh_addr - (phdr_size + phdr_size_adjust);
+
+ phdr->p_paddr = 0;
+ phdr->p_filesz = phdr_size;
+ phdr->p_memsz = phdr_size;
+
+ /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
+ phdr->p_flags = PF_R | PF_X;
+
+ phdr->p_align = FILE_ALIGN;
+ BFD_ASSERT ((phdr->p_vaddr - phdr->p_offset) % FILE_ALIGN == 0);
+
+ /* Include the ELF header in the first loadable segment. */
+ phdr_size_adjust += off;
+
+ ++phdr_count;
+ ++phdr;
- done = alloca (i_ehdrp->e_shnum);
- memset (done, 0, i_ehdrp->e_shnum);
- for (i = 0; i < i_ehdrp->e_shnum; i++)
+ phdr->p_type = PT_INTERP;
+ phdr->p_offset = sinterp->filepos;
+ phdr->p_vaddr = sinterp->vma;
+ phdr->p_paddr = 0;
+ phdr->p_filesz = sinterp->_raw_size;
+ phdr->p_memsz = sinterp->_raw_size;
+ phdr->p_flags = PF_R;
+ phdr->p_align = 1 << bfd_get_section_alignment (abfd, sinterp);
+
+ ++phdr_count;
+ ++phdr;
+ }
+
+ /* Look through the sections to see how they will be divided into
+ program segments. The sections must be arranged in order by
+ sh_addr for this to work correctly. */
+ phdr->p_type = PT_NULL;
+ last_type = SHT_PROGBITS;
+ for (i = 1, hdrpp = elf_elfsections (abfd) + 1;
+ i < elf_elfheader (abfd)->e_shnum;
+ i++, hdrpp++)
{
- i_shdrp = i_shdrpp[i];
- /* If it's going to be mapped in, it's been assigned a position. */
- if (i_shdrp->sh_offset + 1 == 0)
+ Elf_Internal_Shdr *hdr;
+
+ hdr = *hdrpp;
+
+ /* Ignore any section which will not be part of the process
+ image. */
+ if ((hdr->sh_flags & SHF_ALLOC) == 0)
+ continue;
+
+ /* If this section fits in the segment we are constructing, add
+ it in. */
+ if (phdr->p_type != PT_NULL
+ && (hdr->sh_offset - (phdr->p_offset + phdr->p_memsz)
+ == hdr->sh_addr - (phdr->p_vaddr + phdr->p_memsz))
+ && (last_type != SHT_NOBITS || hdr->sh_type == SHT_NOBITS))
{
- /* Well, not really, but we won't process it here. */
- done[i] = 1;
+ bfd_size_type adjust;
+
+ adjust = hdr->sh_addr - (phdr->p_vaddr + phdr->p_memsz);
+ phdr->p_memsz += hdr->sh_size + adjust;
+ if (hdr->sh_type != SHT_NOBITS)
+ phdr->p_filesz += hdr->sh_size + adjust;
+ if ((hdr->sh_flags & SHF_WRITE) != 0)
+ phdr->p_flags |= PF_W;
+ if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
+ phdr->p_flags |= PF_X;
+ last_type = hdr->sh_type;
continue;
}
- if (i_shdrp->sh_offset < lowest_offset
- || lowest_offset == 0)
- lowest_offset = i_shdrp->sh_offset;
- /* Only interested in PROGBITS or NOBITS for generating segments. */
- switch (i_shdrp->sh_type)
+
+ /* If we have a segment, move to the next one. */
+ if (phdr->p_type != PT_NULL)
{
- case SHT_PROGBITS:
- case SHT_NOBITS:
- break;
- default:
- done[i] = 1;
+ ++phdr;
+ ++phdr_count;
}
- if (!done[i])
- n_left++;
- }
- while (n_left)
- {
- bfd_vma lowest_vma = -1, high;
- int low_sec = 0;
- int mem_size;
- int file_size = 0;
- for (i = 1; i < i_ehdrp->e_shnum; i++)
+ /* Start a new segment. */
+ phdr->p_type = PT_LOAD;
+ phdr->p_offset = hdr->sh_offset;
+ phdr->p_vaddr = hdr->sh_addr;
+ phdr->p_paddr = 0;
+ if (hdr->sh_type == SHT_NOBITS)
+ phdr->p_filesz = 0;
+ else
+ phdr->p_filesz = hdr->sh_size;
+ phdr->p_memsz = hdr->sh_size;
+ phdr->p_flags = PF_R;
+ if ((hdr->sh_flags & SHF_WRITE) != 0)
+ phdr->p_flags |= PF_W;
+ if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
+ phdr->p_flags |= PF_X;
+ phdr->p_align = get_elf_backend_data (abfd)->maxpagesize;
+
+ if (hdr == first
+ && sinterp != NULL
+ && (sinterp->flags & SEC_LOAD) != 0)
{
- i_shdrp = i_shdrpp[i];
- if (!done[i] && i_shdrp->sh_addr < lowest_vma)
- {
- lowest_vma = i_shdrp->sh_addr;
- low_sec = i;
- }
+ phdr->p_offset -= phdr_size + phdr_size_adjust;
+ phdr->p_vaddr -= phdr_size + phdr_size_adjust;
+ phdr->p_filesz += phdr_size + phdr_size_adjust;
+ phdr->p_memsz += phdr_size + phdr_size_adjust;
}
- if (low_sec == 0)
- abort ();
- /* So now we know the lowest vma of any unassigned sections; start
- a segment there. */
- {
- struct seg_info *s;
- s = (struct seg_info *) bfd_alloc (abfd, sizeof (struct seg_info));
- s->next = seg;
- seg = s;
- }
- seg->low = lowest_vma;
- i_shdrp = i_shdrpp[low_sec];
- seg->start_pos = i_shdrp->sh_offset;
- seg->sh_flags = i_shdrp->sh_flags;
- done[low_sec] = 1, n_left--;
- mem_size = i_shdrp->sh_size;
- high = lowest_vma + i_shdrp->sh_size;
- if (i_shdrp->sh_type == SHT_PROGBITS)
- file_size = i_shdrp->sh_size;
+ last_type = hdr->sh_type;
+ }
- for (i = 0; i < i_ehdrp->e_shnum; i++)
- {
- file_ptr f1;
+ if (phdr->p_type != PT_NULL)
+ {
+ ++phdr;
+ ++phdr_count;
+ }
- if (file_size != mem_size)
- break;
- if (done[i])
- continue;
- i_shdrp = i_shdrpp[i];
- /* position of next byte on disk */
- f1 = seg->start_pos + file_size;
- if (i_shdrp->sh_type == SHT_PROGBITS)
- {
- if (i_shdrp->sh_offset - f1 != i_shdrp->sh_addr - high)
- continue;
- }
- else /* sh_type == NOBITS */
- {
- /* If the section in question has no contents in the disk
- file, we really don't care where it supposedly starts.
- But we don't want to bother merging it into this segment
- if it doesn't start on this memory page. */
- bfd_vma page1, page2;
- bfd_vma maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
-
- /* page number in address space of current end of seg */
- page1 = (high - 1 + maxpagesize - 1) / maxpagesize;
- /* page number in address space of start of this section */
- page2 = (i_shdrp->sh_addr + maxpagesize - 1) / maxpagesize;
-
- if (page1 != page2)
- continue;
- }
- done[i] = 1, n_left--;
- if (i_shdrp->sh_type == SHT_PROGBITS)
- file_size = i_shdrp->sh_offset + i_shdrp->sh_size - seg->start_pos;
- mem_size = i_shdrp->sh_addr + i_shdrp->sh_size - seg->low;
- high = i_shdrp->sh_addr + i_shdrp->sh_size;
- i = 0;
- }
- seg->file_size = file_size;
- seg->mem_size = mem_size;
+ /* If we have a .dynamic section, create a PT_DYNAMIC segment. */
+ sdyn = bfd_get_section_by_name (abfd, ".dynamic");
+ if (sdyn != NULL && (sdyn->flags & SEC_LOAD) != 0)
+ {
+ phdr->p_type = PT_DYNAMIC;
+ phdr->p_offset = sdyn->filepos;
+ phdr->p_vaddr = sdyn->vma;
+ phdr->p_paddr = 0;
+ phdr->p_filesz = sdyn->_raw_size;
+ phdr->p_memsz = sdyn->_raw_size;
+ phdr->p_flags = PF_R;
+ if ((sdyn->flags & SEC_READONLY) == 0)
+ phdr->p_flags |= PF_W;
+ if ((sdyn->flags & SEC_CODE) != 0)
+ phdr->p_flags |= PF_X;
+ phdr->p_align = 1 << bfd_get_section_alignment (abfd, sdyn);
+
+ ++phdr;
+ ++phdr_count;
}
- /* Now do something with the list of segments we've built up. */
- {
- bfd_vma maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
- struct seg_info *s;
- int n_segs = 0;
- int sz;
- for (s = seg; s; s = s->next)
- {
- n_segs++;
- }
- i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
- sz = sizeof (Elf_External_Phdr) * n_segs;
- if (i_ehdrp->e_ehsize + sz <= lowest_offset)
- i_ehdrp->e_phoff = i_ehdrp->e_ehsize;
- else
- {
- i_ehdrp->e_phoff = elf_tdata (abfd)->next_file_pos;
- elf_tdata (abfd)->next_file_pos += sz;
- }
- phdr = bfd_alloc (abfd, n_segs * sizeof (Elf_Internal_Phdr));
- elf_tdata (abfd)->phdr = phdr;
- while (seg)
- {
- phdr->p_type = PT_LOAD; /* only type we really support so far */
- phdr->p_offset = seg->start_pos;
- phdr->p_vaddr = seg->low;
- phdr->p_paddr = 0;
- phdr->p_filesz = seg->file_size;
- phdr->p_memsz = seg->mem_size;
- phdr->p_flags = PF_R;
- phdr->p_align = maxpagesize; /* ? */
- if (seg->sh_flags & SHF_WRITE)
- phdr->p_flags |= PF_W;
- if (seg->sh_flags & SHF_EXECINSTR)
- phdr->p_flags |= PF_X;
- phdr++;
- seg = seg->next;
- }
- i_ehdrp->e_phnum = n_segs;
- }
- elf_write_phdrs (abfd, i_ehdrp, elf_tdata (abfd)->phdr, i_ehdrp->e_phnum);
+ /* Make sure the return value from get_program_header_size matches
+ what we computed here. */
+ if (phdr_count != phdr_size / sizeof (Elf_Internal_Phdr))
+ abort ();
+
+ /* Set up program header information. */
+ i_ehdrp = elf_elfheader (abfd);
+ i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
+ i_ehdrp->e_phoff = off;
+ i_ehdrp->e_phnum = phdr_count;
+
+ /* Save the program headers away. I don't think anybody uses this
+ information right now. */
+ elf_tdata (abfd)->phdr = ((Elf_Internal_Phdr *)
+ bfd_alloc (abfd,
+ (phdr_count
+ * sizeof (Elf_Internal_Phdr))));
+ if (elf_tdata (abfd)->phdr == NULL && phdr_count != 0)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return (file_ptr) -1;
+ }
+ memcpy (elf_tdata (abfd)->phdr, phdrs,
+ phdr_count * sizeof (Elf_Internal_Phdr));
+
+ /* Write out the program headers. */
+ if (bfd_seek (abfd, off, SEEK_SET) != 0)
+ return (file_ptr) -1;
+
+ for (i = 0, phdr = phdrs; i < phdr_count; i++, phdr++)
+ {
+ Elf_External_Phdr extphdr;
+
+ elf_swap_phdr_out (abfd, phdr, &extphdr);
+ if (bfd_write (&extphdr, sizeof (Elf_External_Phdr), 1, abfd)
+ != sizeof (Elf_External_Phdr))
+ return (file_ptr) -1;
+ }
+
+ return off + phdr_count * sizeof (Elf_External_Phdr);
}
-static void
-assign_file_positions_except_relocs (abfd)
- bfd *abfd;
-{
- /* For now, we ignore the possibility of having program segments, which
- may require some alignment in the file. That'll require padding, and
- some interesting calculations to optimize file space usage.
+/* Work out the file positions of all the sections. This is called by
+ elf_compute_section_file_positions. All the section sizes and VMAs
+ must be known before this is called.
- Also, since the application may change the list of relocations for
- a given section, we don't figure them in here. We'll put them at the
- end of the file, at positions computed during bfd_close.
+ We do not consider reloc sections at this point, unless they form
+ part of the loadable image. Reloc sections are assigned file
+ positions in assign_file_positions_for_relocs, which is called by
+ write_object_contents and final_link.
- The order, for now: <ehdr> <shdr> <sec1> <sec2> <sec3> ... <rel1> ...
- or: <ehdr> <phdr> <sec1> <sec2> ... <shdr> <rel1> ... */
+ If DOSYMS is false, we do not assign file positions for the symbol
+ table or the string table. */
+static boolean
+assign_file_positions_except_relocs (abfd, dosyms)
+ bfd *abfd;
+ boolean dosyms;
+{
+ struct elf_obj_tdata * const tdata = elf_tdata (abfd);
+ Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
+ Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
file_ptr off;
- int i;
- Elf_Internal_Shdr **i_shdrpp = elf_elfsections (abfd);
- Elf_Internal_Shdr *i_shdrp;
- Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
- int exec_p = (abfd->flags & EXEC_P) != 0;
- /* Everything starts after the ELF file header. */
+ /* Start after the ELF header. */
off = i_ehdrp->e_ehsize;
- if (!exec_p)
+ if ((abfd->flags & EXEC_P) == 0)
{
- /* Section headers. */
- i_ehdrp->e_shoff = off;
- off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
+ Elf_Internal_Shdr **hdrpp;
+ unsigned int i;
- off = assign_file_positions_for_symtab_and_strtabs (abfd, off);
- }
- for (i = 0; i < i_ehdrp->e_shnum; i++)
- {
- i_shdrp = i_shdrpp[i];
- if (i_shdrp->sh_type == SHT_REL || i_shdrp->sh_type == SHT_RELA)
- {
- i_shdrp->sh_offset = -1;
- continue;
- }
- if (exec_p)
+ /* We are not creating an executable, which means that we are
+ not creating a program header, and that the actual order of
+ the sections in the file is unimportant. */
+ for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++)
{
- bfd_vma maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
- if (maxpagesize == 0)
- maxpagesize = 1; /* make the arithmetic work */
- /* This isn't necessarily going to give the best packing, if the
- segments require padding between them, but since that isn't
- usually the case, this'll do. */
- if ((i_shdrp->sh_flags & SHF_ALLOC) == 0)
+ Elf_Internal_Shdr *hdr;
+
+ hdr = *hdrpp;
+ if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
{
- i_shdrp->sh_offset = -1;
+ hdr->sh_offset = -1;
continue;
}
- /* Blindly assume that the segments are ordered optimally. With
- the default LD script, they will be. */
- {
- /* need big unsigned type */
- bfd_vma addtl_off;
- addtl_off = i_shdrp->sh_addr - off;
- addtl_off = addtl_off % maxpagesize;
- if (addtl_off)
- {
- off += addtl_off;
- }
- }
- if (i_shdrp->sh_type == SHT_NOBITS)
+ if (! dosyms
+ && (i == tdata->symtab_section
+ || i == tdata->strtab_section))
{
- file_ptr off2;
- i_shdrp->sh_offset = off;
- if (off % maxpagesize != 0)
- off2 = maxpagesize - (off % maxpagesize);
- if (off2 > i_shdrp->sh_size)
- off2 = i_shdrp->sh_size;
- off += off2;
+ hdr->sh_offset = -1;
+ continue;
}
+
+ off = assign_file_position_for_section (hdr, off, true);
}
- off = assign_file_position_for_section (i_shdrp, off);
- if (exec_p
- && get_elf_backend_data(abfd)->maxpagesize > 1
- && i_shdrp->sh_type == SHT_PROGBITS
- && (i_shdrp->sh_flags & SHF_ALLOC)
- && (i_shdrp->sh_offset - i_shdrp->sh_addr) % get_elf_backend_data(abfd)->maxpagesize != 0)
- abort ();
}
- if (exec_p)
+ else
{
- elf_tdata (abfd)->next_file_pos = off;
- map_program_segments (abfd);
- off = elf_tdata (abfd)->next_file_pos;
+ file_ptr phdr_off;
+ bfd_size_type phdr_size;
+ bfd_vma maxpagesize;
+ Elf_Internal_Shdr **hdrpp;
+ unsigned int i;
+ Elf_Internal_Shdr *first;
+ file_ptr phdr_map;
+
+ /* We are creating an executable. We must create a program
+ header. We can't actually create the program header until we
+ have set the file positions for the sections, but we can
+ figure out how big it is going to be. */
+ off = align_file_position (off);
+ phdr_size = get_program_header_size (abfd);
+ if (phdr_size == (file_ptr) -1)
+ return false;
+ phdr_off = off;
+ off += phdr_size;
+
+ maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
+ if (maxpagesize == 0)
+ maxpagesize = 1;
+
+ /* FIXME: We might want to sort the sections on the sh_addr
+ field here. For now, we just assume that the linker will
+ create the sections in an appropriate order. */
+
+ /* Assign file positions in two passes. In the first pass, we
+ assign a file position to every section which forms part of
+ the executable image. */
+ first = NULL;
+ for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++)
+ {
+ Elf_Internal_Shdr *hdr;
+
+ hdr = *hdrpp;
+ if ((hdr->sh_flags & SHF_ALLOC) == 0)
+ continue;
- /* Section headers. */
- i_ehdrp->e_shoff = off;
- off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
+ if (first == NULL)
+ first = hdr;
- off = assign_file_positions_for_symtab_and_strtabs (abfd, off);
+ if ((abfd->flags & D_PAGED) != 0)
+ {
+ /* The section VMA must equal the file position modulo
+ the page size. This is required by the program
+ header. */
+ off += (hdr->sh_addr - off) % maxpagesize;
+ }
+
+ off = assign_file_position_for_section (hdr, off, false);
+ }
- for (i = 0; i < i_ehdrp->e_shnum; i++)
+ /* Assign file positions to all the sections which do not form
+ part of the loadable image, except for the relocs. */
+ for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++)
{
- i_shdrp = i_shdrpp[i];
- if (i_shdrp->sh_offset + 1 == 0
- && i_shdrp->sh_type != SHT_REL
- && i_shdrp->sh_type != SHT_RELA)
- off = assign_file_position_for_section (i_shdrp, off);
+ Elf_Internal_Shdr *hdr;
+
+ hdr = *hdrpp;
+ if ((hdr->sh_flags & SHF_ALLOC) != 0)
+ continue;
+ if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
+ {
+ hdr->sh_offset = -1;
+ continue;
+ }
+ if (! dosyms
+ && (i == tdata->symtab_section
+ || i == tdata->strtab_section))
+ {
+ hdr->sh_offset = -1;
+ continue;
+ }
+
+ off = assign_file_position_for_section (hdr, off, true);
}
+
+ phdr_map = map_program_segments (abfd, phdr_off, first, phdr_size);
+ if (phdr_map == (file_ptr) -1)
+ return false;
+ BFD_ASSERT (phdr_map == phdr_off + phdr_size);
}
+
+ /* Place the section headers. */
+ off = align_file_position (off);
+ i_ehdrp->e_shoff = off;
+ off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
+
elf_tdata (abfd)->next_file_pos = off;
+
+ return true;
}
static boolean
prep_headers (abfd)
bfd *abfd;
{
- Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
- Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
- Elf_External_Shdr *x_shdrp; /* Section header table, external form */
+ Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
-
int count;
- int scnt;
struct strtab *shstrtab;
i_ehdrp = elf_elfheader (abfd);
i_shdrp = elf_elfsections (abfd);
shstrtab = bfd_new_strtab (abfd);
+ if (!shstrtab)
+ return false;
+
elf_shstrtab (abfd) = shstrtab;
i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */
break;
case bfd_arch_hppa:
- i_ehdrp->e_machine = EM_HPPA;
+ i_ehdrp->e_machine = EM_PARISC;
+ break;
+ case bfd_arch_powerpc:
+ i_ehdrp->e_machine = EM_CYGNUS_POWERPC;
break;
/* also note that EM_M32, AT&T WE32100 is unknown to bfd */
default:
".strtab");
elf_tdata (abfd)->shstrtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab,
".shstrtab");
+ if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
+ || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
+ || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
+ return false;
+ return true;
}
-static void
+static boolean
swap_out_syms (abfd)
bfd *abfd;
{
- struct strtab *shstrtab = elf_shstrtab (abfd);
-
- elf_map_symbols (abfd);
+ if (!elf_map_symbols (abfd))
+ return false;
/* Dump out the symtabs. */
{
Elf_External_Sym *outbound_syms;
int idx;
+ if (!stt)
+ return false;
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
symtab_hdr->sh_type = SHT_SYMTAB;
symtab_hdr->sh_entsize = sizeof (Elf_External_Sym);
symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
+ /* FIXME: Systems I've checked use 4 byte alignment for .symtab,
+ but it is possible that there are systems which use a different
+ alignment. */
+ symtab_hdr->sh_addralign = 4;
+
/* see assert in elf_fake_sections that supports this: */
symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
symstrtab_hdr->sh_type = SHT_STRTAB;
outbound_syms = (Elf_External_Sym *)
bfd_alloc (abfd, (1 + symcount) * sizeof (Elf_External_Sym));
+ if (!outbound_syms)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
/* now generate the data (for "contents") */
{
/* Fill in zeroth symbol and swap it out. */
/* Section symbols have no names. */
sym.st_name = 0;
else
- sym.st_name = bfd_add_to_strtab (abfd, stt, syms[idx]->name);
+ {
+ sym.st_name = bfd_add_to_strtab (abfd, stt, syms[idx]->name);
+ if (sym.st_name == (unsigned long) -1)
+ return false;
+ }
if (bfd_is_com_section (syms[idx]->section))
{
sym.st_size = value;
/* Should retrieve this from somewhere... */
sym.st_value = 16;
- sym.st_shndx = SHN_COMMON;
+ sym.st_shndx = elf_section_from_bfd_section (abfd,
+ syms[idx]->section);
}
else
{
asection *sec = syms[idx]->section;
+ elf_symbol_type *type_ptr;
int shndx;
if (sec->output_section)
}
value += sec->vma;
sym.st_value = value;
- sym.st_size = (elf_symbol_from (abfd, syms[idx]))->internal_elf_sym.st_size;
+ type_ptr = elf_symbol_from (abfd, syms[idx]);
+ sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec);
if (shndx == -1)
{
section of a symbol to be a section that is actually in
the output file. */
sec2 = bfd_get_section_by_name (abfd, sec->name);
- assert (sec2 != 0);
+ BFD_ASSERT (sec2 != 0);
sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec2);
- assert (shndx != -1);
+ BFD_ASSERT (shndx != -1);
}
}
if (bfd_is_com_section (syms[idx]->section))
- sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_NOTYPE);
+ sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_OBJECT);
else if (syms[idx]->section == &bfd_und_section)
sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_NOTYPE);
- else if (syms[idx]->flags & BSF_WEAK)
- sym.st_info = ELF_ST_INFO (STB_WEAK, STT_OBJECT);
else if (syms[idx]->flags & BSF_SECTION_SYM)
sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
else if (syms[idx]->flags & BSF_FILE)
sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
- else if (syms[idx]->flags & (BSF_GLOBAL | BSF_EXPORT))
+ else
{
- if (syms[idx]->flags & BSF_FUNCTION)
- sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_FUNC);
- else
- sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_OBJECT);
- }
- else if (syms[idx]->flags & BSF_LOCAL)
- {
- if (syms[idx]->flags & BSF_FUNCTION)
- sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
- else
- sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_OBJECT);
+ int bind = STB_LOCAL;
+ int type = STT_OBJECT;
+ unsigned int flags = syms[idx]->flags;
+
+ if (flags & BSF_LOCAL)
+ bind = STB_LOCAL;
+ else if (flags & BSF_WEAK)
+ bind = STB_WEAK;
+ else if (flags & BSF_GLOBAL)
+ bind = STB_GLOBAL;
+
+ if (flags & BSF_FUNCTION)
+ type = STT_FUNC;
+
+ sym.st_info = ELF_ST_INFO (bind, type);
}
- else
- /* Default to local if flag isn't set at all. */
- sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_OBJECT);
sym.st_other = 0;
elf_swap_symbol_out (abfd, &sym,
- outbound_syms + elf_symtab_map (abfd)[idx]);
+ (outbound_syms
+ + elf_sym_extra (abfd)[idx].elf_sym_num));
}
symtab_hdr->contents = (PTR) outbound_syms;
symstrtab_hdr->sh_entsize = 0;
symstrtab_hdr->sh_link = 0;
symstrtab_hdr->sh_info = 0;
- symstrtab_hdr->sh_addralign = 0;
+ symstrtab_hdr->sh_addralign = 1;
symstrtab_hdr->size = 0;
}
- /* put the strtab out too... */
- {
- Elf_Internal_Shdr *this_hdr;
-
- this_hdr = &elf_tdata(abfd)->shstrtab_hdr;
- this_hdr->contents = (PTR) elf_shstrtab (abfd)->tab;
- this_hdr->sh_size = elf_shstrtab (abfd)->length;
- this_hdr->sh_type = SHT_STRTAB;
- this_hdr->sh_flags = 0;
- this_hdr->sh_addr = 0;
- this_hdr->sh_entsize = 0;
- this_hdr->sh_addralign = 0;
- this_hdr->size = 0;
- }
+ return true;
}
static boolean
{
Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
- Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
Elf_External_Shdr *x_shdrp; /* Section header table, external form */
Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
-
- int count;
- int scnt;
+ unsigned int count;
struct strtab *shstrtab;
i_ehdrp = elf_elfheader (abfd);
elf_debug_file (i_ehdrp);
#endif
elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr);
- bfd_seek (abfd, (file_ptr) 0, SEEK_SET);
- bfd_write ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd);
+ if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
+ || (bfd_write ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd)
+ != sizeof (x_ehdr)))
+ return false;
/* at this point we've concocted all the ELF sections... */
x_shdrp = (Elf_External_Shdr *)
bfd_alloc (abfd, sizeof (*x_shdrp) * (i_ehdrp->e_shnum));
if (!x_shdrp)
{
- bfd_error = no_memory;
+ bfd_set_error (bfd_error_no_memory);
return false;
}
#endif
elf_swap_shdr_out (abfd, i_shdrp[count], x_shdrp + count);
}
- bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET);
- bfd_write ((PTR) x_shdrp, sizeof (*x_shdrp), i_ehdrp->e_shnum, abfd);
+ if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0
+ || (bfd_write ((PTR) x_shdrp, sizeof (*x_shdrp), i_ehdrp->e_shnum, abfd)
+ != sizeof (*x_shdrp) * i_ehdrp->e_shnum))
+ return false;
+
/* need to dump the string table too... */
return true;
}
+/* Assign file positions for all the reloc sections which are not part
+ of the loadable file image. */
+
static void
assign_file_positions_for_relocs (abfd)
bfd *abfd;
{
- file_ptr off = elf_tdata(abfd)->next_file_pos;
- int i;
- Elf_Internal_Shdr **shdrpp = elf_elfsections (abfd);
- Elf_Internal_Shdr *shdrp;
- for (i = 0; i < elf_elfheader(abfd)->e_shnum; i++)
+ file_ptr off;
+ unsigned int i;
+ Elf_Internal_Shdr **shdrpp;
+
+ off = elf_tdata (abfd)->next_file_pos;
+
+ for (i = 1, shdrpp = elf_elfsections (abfd) + 1;
+ i < elf_elfheader (abfd)->e_shnum;
+ i++, shdrpp++)
{
- shdrp = shdrpp[i];
- if (shdrp->sh_type != SHT_REL && shdrp->sh_type != SHT_RELA)
- continue;
- off = assign_file_position_for_section (shdrp, off);
+ Elf_Internal_Shdr *shdrp;
+
+ shdrp = *shdrpp;
+ if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
+ && shdrp->sh_offset == -1)
+ off = assign_file_position_for_section (shdrp, off, true);
}
- elf_tdata(abfd)->next_file_pos = off;
+
+ elf_tdata (abfd)->next_file_pos = off;
}
boolean
-DEFUN (NAME(bfd_elf,write_object_contents), (abfd), bfd * abfd)
+NAME(bfd_elf,write_object_contents) (abfd)
+ bfd *abfd;
{
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
Elf_Internal_Ehdr *i_ehdrp;
Elf_Internal_Shdr **i_shdrp;
- int count;
+ unsigned int count;
- if (abfd->output_has_begun == false)
+ /* We don't know how to write dynamic objects. Specifically, we
+ don't know how to construct the program header. */
+ if ((abfd->flags & DYNAMIC) != 0)
{
- prep_headers (abfd);
- elf_compute_section_file_positions (abfd);
- abfd->output_has_begun = true;
+ fprintf (stderr, "Writing ELF dynamic objects is not supported\n");
+ bfd_set_error (bfd_error_wrong_format);
+ return false;
}
+ if (! abfd->output_has_begun
+ && ! elf_compute_section_file_positions (abfd,
+ (struct bfd_link_info *) NULL))
+ return false;
+
i_shdrp = elf_elfsections (abfd);
i_ehdrp = elf_elfheader (abfd);
assign_file_positions_for_relocs (abfd);
/* After writing the headers, we need to write the sections too... */
- for (count = 0; count < i_ehdrp->e_shnum; count++)
- if (i_shdrp[count]->contents)
- {
- bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET);
- bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size, 1, abfd);
- }
+ for (count = 1; count < i_ehdrp->e_shnum; count++)
+ {
+ if (bed->elf_backend_section_processing)
+ (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
+ if (i_shdrp[count]->contents)
+ {
+ if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
+ || (bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size,
+ 1, abfd)
+ != i_shdrp[count]->sh_size))
+ return false;
+ }
+ }
+
+ if (bed->elf_backend_final_write_processing)
+ (*bed->elf_backend_final_write_processing) (abfd);
+
return write_shdrs_and_ehdr (abfd);
}
The mapping has to hide in the Elf_Internal_Shdr since asection
doesn't have anything like a tdata field... */
-static struct sec *
-DEFUN (section_from_elf_index, (abfd, index),
- bfd * abfd AND
- int index)
+static asection *
+section_from_elf_index (abfd, index)
+ bfd *abfd;
+ unsigned int index;
{
/* @@ Is bfd_com_section really correct in all the places it could
be returned from this routine? */
return &bfd_com_section;
if (index > elf_elfheader (abfd)->e_shnum)
- return 0;
+ return NULL;
{
Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[index];
/* ELF sections that map to BFD sections */
case SHT_PROGBITS:
case SHT_NOBITS:
- if (!hdr->rawdata)
- bfd_section_from_shdr (abfd, index);
+ case SHT_HASH:
+ case SHT_DYNAMIC:
+ if (hdr->rawdata == NULL)
+ {
+ if (! bfd_section_from_shdr (abfd, index))
+ return NULL;
+ }
return (struct sec *) hdr->rawdata;
default:
/* given a section, search the header to find them... */
static int
-DEFUN (elf_section_from_bfd_section, (abfd, asect),
- bfd * abfd AND
- struct sec *asect)
+elf_section_from_bfd_section (abfd, asect)
+ bfd *abfd;
+ struct sec *asect;
{
Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
int index;
/* ELF sections that map to BFD sections */
case SHT_PROGBITS:
case SHT_NOBITS:
+ case SHT_NOTE:
+ case SHT_HASH:
+ case SHT_DYNAMIC:
if (hdr->rawdata)
{
if (((struct sec *) (hdr->rawdata)) == asect)
return index;
}
break;
+
+ case SHT_STRTAB:
+ /* fix_up_strtabs will generate STRTAB sections with names
+ of .stab*str. */
+ if (!strncmp (asect->name, ".stab", 5)
+ && !strcmp ("str", asect->name + strlen (asect->name) - 3))
+ {
+ if (hdr->rawdata)
+ {
+ if (((struct sec *) (hdr->rawdata)) == asect)
+ return index;
+ }
+ break;
+ }
+ /* FALL THROUGH */
default:
+ {
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+
+ if (bed->elf_backend_section_from_bfd_section)
+ {
+ int retval;
+
+ retval = index;
+ if ((*bed->elf_backend_section_from_bfd_section)
+ (abfd, hdr, asect, &retval))
+ return retval;
+ }
+ }
break;
}
}
/* given a symbol, return the bfd index for that symbol. */
static int
-DEFUN (elf_symbol_from_bfd_symbol, (abfd, asym_ptr_ptr),
- bfd * abfd AND
- struct symbol_cache_entry **asym_ptr_ptr)
+elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr)
+ bfd *abfd;
+ struct symbol_cache_entry **asym_ptr_ptr;
{
struct symbol_cache_entry *asym_ptr = *asym_ptr_ptr;
- CONST char *name = asym_ptr->name;
int idx;
- int symcount = bfd_get_symcount (abfd);
- asymbol **syms = bfd_get_outsymbols (abfd);
-
- /* FIXME -- there has to be a better way than linear search. */
- for (idx = 0; idx < symcount; idx++)
+ flagword flags = asym_ptr->flags;
+
+ /* When gas creates relocations against local labels, it creates its
+ own symbol for the section, but does put the symbol into the
+ symbol chain, so udata is 0. When the linker is generating
+ relocatable output, this section symbol may be for one of the
+ input sections rather than the output section. */
+ if (asym_ptr->udata == (PTR) 0
+ && (flags & BSF_SECTION_SYM)
+ && asym_ptr->section)
{
- if (syms[idx] == asym_ptr
- || (name == syms[idx]->name && name)
- || ((asym_ptr->flags & BSF_SECTION_SYM)
- && (syms[idx]->flags & BSF_SECTION_SYM)
- && asym_ptr->section == syms[idx]->section))
- break;
+ int indx;
+
+ if (asym_ptr->section->output_section != NULL)
+ indx = asym_ptr->section->output_section->index;
+ else
+ indx = asym_ptr->section->index;
+ if (elf_section_syms (abfd)[indx])
+ asym_ptr->udata = elf_section_syms (abfd)[indx]->udata;
}
- if (idx >= symcount)
+ if (asym_ptr->udata)
+ idx = ((Elf_Sym_Extra *) asym_ptr->udata)->elf_sym_num;
+ else
{
- /* badness... */
- fprintf (stderr, "bfd app err: can't find sym `%s' in symtab\n",
- name);
abort ();
}
- idx = elf_symtab_map (abfd)[idx];
#if DEBUG & 4
{
- flagword flags = asym_ptr->flags;
fprintf (stderr,
- "elfsym<-bfdsym %.8lx `%s' sec=%s symnum=%d {",
- (long) asym_ptr, asym_ptr->name, asym_ptr->section->name, idx);
-
- if (flags == BSF_NO_FLAGS)
- fprintf (stderr, " none");
-
- if (flags & BSF_LOCAL)
- fprintf (stderr, " local");
-
- if (flags & BSF_GLOBAL)
- fprintf (stderr, " global");
-
- if (flags & BSF_EXPORT)
- fprintf (stderr, " export");
-
- if (flags & BSF_DEBUGGING)
- fprintf (stderr, " debugging");
-
- if (flags & BSF_KEEP)
- fprintf (stderr, " keep");
-
- if (flags & BSF_KEEP_G)
- fprintf (stderr, " keep_g");
-
- if (flags & BSF_WEAK)
- fprintf (stderr, " weak");
-
- if (flags & BSF_SECTION_SYM)
- fprintf (stderr, " section_sym");
-
- if (flags & BSF_OLD_COMMON)
- fprintf (stderr, " old_common");
-
- if (flags & BSF_NOT_AT_END)
- fprintf (stderr, " not_at_end");
-
- if (flags & BSF_CONSTRUCTOR)
- fprintf (stderr, " constructor");
-
- if (flags & BSF_WARNING)
- fprintf (stderr, " warning");
-
- if (flags & BSF_INDIRECT)
- fprintf (stderr, " indirect");
-
- if (flags & BSF_FILE)
- fprintf (stderr, " file");
-
- if (flags & BSF_FUNCTION)
- fprintf (stderr, " function");
-
- fputs (" }\n", stderr);
+ "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx %s\n",
+ (long) asym_ptr, asym_ptr->name, idx, flags, elf_symbol_flags (flags));
fflush (stderr);
}
#endif
return idx;
}
-static boolean
-DEFUN (elf_slurp_symbol_table, (abfd, symptrs),
- bfd * abfd AND
- asymbol ** symptrs) /* Buffer for generated bfd symbols */
+static long
+elf_slurp_symbol_table (abfd, symptrs, dynamic)
+ bfd *abfd;
+ asymbol **symptrs; /* Buffer for generated bfd symbols */
+ boolean dynamic;
{
- Elf_Internal_Shdr *hdr = &elf_tdata(abfd)->symtab_hdr;
- int symcount; /* Number of external ELF symbols */
- int i;
+ Elf_Internal_Shdr *hdr;
+ long symcount; /* Number of external ELF symbols */
elf_symbol_type *sym; /* Pointer to current bfd symbol */
elf_symbol_type *symbase; /* Buffer for generated bfd symbols */
Elf_Internal_Sym i_sym;
- Elf_External_Sym *x_symp;
-
- /* this is only valid because there is only one symtab... */
- /* FIXME: This is incorrect, there may also be a dynamic symbol
- table which is a subset of the full symbol table. We either need
- to be prepared to read both (and merge them) or ensure that we
- only read the full symbol table. Currently we only get called to
- read the full symbol table. -fnf */
- if (bfd_get_outsymbols (abfd) != NULL)
- {
- return true;
- }
+ Elf_External_Sym *x_symp = NULL;
/* Read each raw ELF symbol, converting from external ELF form to
internal ELF form, and then using the information to create a
space left over at the end. When we have all the symbols, we
build the caller's pointer vector. */
+ if (dynamic)
+ hdr = &elf_tdata (abfd)->dynsymtab_hdr;
+ else
+ hdr = &elf_tdata (abfd)->symtab_hdr;
if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1)
- {
- bfd_error = system_call_error;
- return false;
- }
+ return -1;
symcount = hdr->sh_size / sizeof (Elf_External_Sym);
- symbase = (elf_symbol_type *) bfd_zalloc (abfd, symcount * sizeof (elf_symbol_type));
- sym = symbase;
- /* Temporarily allocate room for the raw ELF symbols. */
- x_symp = (Elf_External_Sym *) bfd_xmalloc (symcount * sizeof (Elf_External_Sym));
-
- if (bfd_read ((PTR) x_symp, sizeof (Elf_External_Sym), symcount, abfd)
- != symcount * sizeof (Elf_External_Sym))
- {
- free ((PTR) x_symp);
- bfd_error = system_call_error;
- return false;
- }
- /* Skip first symbol, which is a null dummy. */
- for (i = 1; i < symcount; i++)
+ if (symcount == 0)
+ sym = symbase = NULL;
+ else
{
- elf_swap_symbol_in (abfd, x_symp + i, &i_sym);
- memcpy (&sym->internal_elf_sym, &i_sym, sizeof (Elf_Internal_Sym));
- memcpy (&sym->native_elf_sym, x_symp + i, sizeof (Elf_External_Sym));
- sym->symbol.the_bfd = abfd;
-
- sym->symbol.name = elf_string_from_elf_section (abfd, hdr->sh_link,
- i_sym.st_name);
+ long i;
- sym->symbol.value = i_sym.st_value;
+ if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1)
+ return -1;
- if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERV)
+ symbase = ((elf_symbol_type *)
+ bfd_zalloc (abfd, symcount * sizeof (elf_symbol_type)));
+ if (symbase == (elf_symbol_type *) NULL)
{
- sym->symbol.section = section_from_elf_index (abfd, i_sym.st_shndx);
+ bfd_set_error (bfd_error_no_memory);
+ return -1;
}
- else if (i_sym.st_shndx == SHN_ABS)
- {
- sym->symbol.section = &bfd_abs_section;
- }
- else if (i_sym.st_shndx == SHN_COMMON)
+ sym = symbase;
+
+ /* Temporarily allocate room for the raw ELF symbols. */
+ x_symp = ((Elf_External_Sym *)
+ malloc (symcount * sizeof (Elf_External_Sym)));
+ if (x_symp == NULL && symcount != 0)
{
- sym->symbol.section = &bfd_com_section;
- /* Elf puts the alignment into the `value' field, and the size
- into the `size' field. BFD wants to see the size in the
- value field, and doesn't care (at the moment) about the
- alignment. */
- sym->symbol.value = i_sym.st_size;
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
}
- else if (i_sym.st_shndx == SHN_UNDEF)
+
+ if (bfd_read ((PTR) x_symp, sizeof (Elf_External_Sym), symcount, abfd)
+ != symcount * sizeof (Elf_External_Sym))
+ goto error_return;
+ /* Skip first symbol, which is a null dummy. */
+ for (i = 1; i < symcount; i++)
{
- sym->symbol.section = &bfd_und_section;
- }
- else
- sym->symbol.section = &bfd_abs_section;
+ elf_swap_symbol_in (abfd, x_symp + i, &i_sym);
+ memcpy (&sym->internal_elf_sym, &i_sym, sizeof (Elf_Internal_Sym));
+#ifdef ELF_KEEP_EXTSYM
+ memcpy (&sym->native_elf_sym, x_symp + i, sizeof (Elf_External_Sym));
+#endif
+ sym->symbol.the_bfd = abfd;
- sym->symbol.value -= sym->symbol.section->vma;
+ sym->symbol.name = elf_string_from_elf_section (abfd, hdr->sh_link,
+ i_sym.st_name);
- switch (ELF_ST_BIND (i_sym.st_info))
- {
- case STB_LOCAL:
- sym->symbol.flags |= BSF_LOCAL;
- break;
- case STB_GLOBAL:
- sym->symbol.flags |= (BSF_GLOBAL | BSF_EXPORT);
- break;
- case STB_WEAK:
- sym->symbol.flags |= BSF_WEAK;
- break;
- }
+ sym->symbol.value = i_sym.st_value;
- switch (ELF_ST_TYPE (i_sym.st_info))
- {
- case STT_SECTION:
- sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING;
- break;
- case STT_FILE:
- sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING;
- break;
- case STT_FUNC:
- sym->symbol.flags |= BSF_FUNCTION;
- break;
- }
+ if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERVE)
+ {
+ sym->symbol.section = section_from_elf_index (abfd,
+ i_sym.st_shndx);
+ if (sym->symbol.section == NULL)
+ {
+ /* This symbol is in a section for which we did not
+ create a BFD section. Just use bfd_abs_section,
+ although it is wrong. FIXME. */
+ sym->symbol.section = &bfd_abs_section;
+ }
+ }
+ else if (i_sym.st_shndx == SHN_ABS)
+ {
+ sym->symbol.section = &bfd_abs_section;
+ }
+ else if (i_sym.st_shndx == SHN_COMMON)
+ {
+ sym->symbol.section = &bfd_com_section;
+ /* Elf puts the alignment into the `value' field, and
+ the size into the `size' field. BFD wants to see the
+ size in the value field, and doesn't care (at the
+ moment) about the alignment. */
+ sym->symbol.value = i_sym.st_size;
+ }
+ else if (i_sym.st_shndx == SHN_UNDEF)
+ {
+ sym->symbol.section = &bfd_und_section;
+ }
+ else
+ sym->symbol.section = &bfd_abs_section;
- /* Is this a definition of $global$? If so, keep it because it will be
- needd if any relocations are performed. */
- if (!strcmp (sym->symbol.name, "$global$")
- && sym->symbol.section != &bfd_und_section)
- {
- /* @@ Why is this referring to backend data and not a field of
- abfd? FIXME */
- struct elf_backend_data *be_data = (struct elf_backend_data *) abfd->xvec->backend_data;
+ sym->symbol.value -= sym->symbol.section->vma;
+
+ switch (ELF_ST_BIND (i_sym.st_info))
+ {
+ case STB_LOCAL:
+ sym->symbol.flags |= BSF_LOCAL;
+ break;
+ case STB_GLOBAL:
+ sym->symbol.flags |= BSF_GLOBAL;
+ break;
+ case STB_WEAK:
+ sym->symbol.flags |= BSF_WEAK;
+ break;
+ }
+
+ switch (ELF_ST_TYPE (i_sym.st_info))
+ {
+ case STT_SECTION:
+ sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING;
+ break;
+ case STT_FILE:
+ sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING;
+ break;
+ case STT_FUNC:
+ sym->symbol.flags |= BSF_FUNCTION;
+ break;
+ }
+
+ if (dynamic)
+ sym->symbol.flags |= BSF_DYNAMIC;
+
+ /* Do some backend-specific processing on this symbol. */
+ {
+ struct elf_backend_data *ebd = get_elf_backend_data (abfd);
+ if (ebd->elf_backend_symbol_processing)
+ (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol);
+ }
- be_data->global_sym = (PTR) sym;
+ sym++;
}
- sym++;
}
- /* We rely on the zalloc to clear out the final symbol entry. */
+ /* Do some backend-specific processing on this symbol table. */
+ {
+ struct elf_backend_data *ebd = get_elf_backend_data (abfd);
+ if (ebd->elf_backend_symbol_table_processing)
+ (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount);
+ }
- /* obj_raw_syms macro uses a cast... */
- elf_tdata (abfd)->raw_syms = (PTR) x_symp;
+ /* We rely on the zalloc to clear out the final symbol entry. */
- bfd_get_symcount (abfd) = symcount = sym - symbase;
+ symcount = sym - symbase;
/* Fill in the user's symbol pointer vector if needed. */
if (symptrs)
{
+ long l = symcount;
+
sym = symbase;
- while (symcount-- > 0)
+ while (l-- > 0)
{
*symptrs++ = &sym->symbol;
sym++;
*symptrs = 0; /* Final null pointer */
}
- return true;
+ if (x_symp != NULL)
+ free (x_symp);
+ return symcount;
+error_return:
+ if (x_symp != NULL)
+ free (x_symp);
+ return -1;
}
/* Return the number of bytes required to hold the symtab vector.
the vector allocated based on this size. However, the ELF symbol table
always has a dummy entry as symbol #0, so it ends up even. */
-unsigned int
-DEFUN (elf_get_symtab_upper_bound, (abfd), bfd * abfd)
+long
+elf_get_symtab_upper_bound (abfd)
+ bfd *abfd;
+{
+ long symcount;
+ long symtab_size;
+ Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
+
+ symcount = hdr->sh_size / sizeof (Elf_External_Sym);
+ symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
+
+ return symtab_size;
+}
+
+long
+elf_get_dynamic_symtab_upper_bound (abfd)
+ bfd *abfd;
{
- unsigned int symcount;
- unsigned int symtab_size = 0;
+ long symcount;
+ long symtab_size;
+ Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
- Elf_Internal_Shdr *hdr = &elf_tdata(abfd)->symtab_hdr;
symcount = hdr->sh_size / sizeof (Elf_External_Sym);
- symtab_size = (symcount - 1 + 1) * (sizeof (asymbol));
+ symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
return symtab_size;
}
attached to bfd <<abfd>>
*/
-unsigned int
+long
elf_get_reloc_upper_bound (abfd, asect)
bfd *abfd;
sec_ptr asect;
if (asect->flags & SEC_RELOC)
{
/* either rel or rela */
- return elf_section_data(asect)->rel_hdr.sh_size;
+ return elf_section_data (asect)->rel_hdr.sh_size;
}
else
return 0;
}
static boolean
-DEFUN (elf_slurp_reloca_table, (abfd, asect, symbols),
- bfd * abfd AND
- sec_ptr asect AND
- asymbol ** symbols)
+elf_slurp_reloca_table (abfd, asect, symbols)
+ bfd *abfd;
+ sec_ptr asect;
+ asymbol **symbols;
{
Elf_External_Rela *native_relocs;
arelent *reloc_cache;
if (asect->flags & SEC_CONSTRUCTOR)
return true;
- bfd_seek (abfd, asect->rel_filepos, SEEK_SET);
+ if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
+ return false;
native_relocs = (Elf_External_Rela *)
bfd_alloc (abfd, asect->reloc_count * sizeof (Elf_External_Rela));
- bfd_read ((PTR) native_relocs,
- sizeof (Elf_External_Rela), asect->reloc_count, abfd);
+ if (!native_relocs)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ if (bfd_read ((PTR) native_relocs,
+ sizeof (Elf_External_Rela), asect->reloc_count, abfd)
+ != sizeof (Elf_External_Rela) * asect->reloc_count)
+ return false;
reloc_cache = (arelent *)
bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent)));
if (!reloc_cache)
{
- bfd_error = no_memory;
+ bfd_set_error (bfd_error_no_memory);
return false;
}
for (idx = 0; idx < asect->reloc_count; idx++)
{
-#ifdef RELOC_PROCESSING
Elf_Internal_Rela dst;
Elf_External_Rela *src;
src = native_relocs + idx;
elf_swap_reloca_in (abfd, src, &dst);
+#ifdef RELOC_PROCESSING
RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect);
#else
- Elf_Internal_Rela dst;
- Elf_External_Rela *src;
-
- cache_ptr = reloc_cache + idx;
- src = native_relocs + idx;
-
- elf_swap_reloca_in (abfd, src, &dst);
-
if (asect->flags & SEC_RELOC)
{
/* relocatable, so the offset is off of the section */
/* non-relocatable, so the offset a virtual address */
cache_ptr->address = dst.r_offset;
}
- /* ELF_R_SYM(dst.r_info) is the symbol table offset; subtract 1
- because the first entry is NULL. */
- cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM (dst.r_info) - 1;
- {
- /* Is it an ELF section symbol? If so, translate it into a
- BFD section symbol. */
- asymbol *s = *(cache_ptr->sym_ptr_ptr);
- if (s->flags & BSF_SECTION_SYM)
- cache_ptr->sym_ptr_ptr = s->section->symbol_ptr_ptr;
- }
+
+ /* ELF_R_SYM(dst.r_info) is the symbol table offset. An offset
+ of zero points to the dummy symbol, which was not read into
+ the symbol table SYMBOLS. */
+ if (ELF_R_SYM (dst.r_info) == 0)
+ cache_ptr->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr;
+ else
+ {
+ asymbol *s;
+
+ cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM (dst.r_info) - 1;
+
+ /* Translate any ELF section symbol into a BFD section
+ symbol. */
+ s = *(cache_ptr->sym_ptr_ptr);
+ if (s->flags & BSF_SECTION_SYM)
+ {
+ cache_ptr->sym_ptr_ptr = s->section->symbol_ptr_ptr;
+ s = *cache_ptr->sym_ptr_ptr;
+ if (s->name == 0 || s->name[0] == 0)
+ abort ();
+ }
+ }
cache_ptr->addend = dst.r_addend;
/* Fill in the cache_ptr->howto field from dst.r_type */
#endif
static boolean
-DEFUN (elf_slurp_reloc_table, (abfd, asect, symbols),
- bfd * abfd AND
- sec_ptr asect AND
- asymbol ** symbols)
+elf_slurp_reloc_table (abfd, asect, symbols)
+ bfd *abfd;
+ sec_ptr asect;
+ asymbol **symbols;
{
Elf_External_Rel *native_relocs;
arelent *reloc_cache;
arelent *cache_ptr;
Elf_Internal_Shdr *data_hdr;
- ElfNAME (Off) data_off;
- ElfNAME (Word) data_max;
+ bfd_vma data_off;
+ unsigned long data_max;
char buf[4]; /* FIXME -- might be elf64 */
unsigned int idx;
if (asect->flags & SEC_CONSTRUCTOR)
return true;
- bfd_seek (abfd, asect->rel_filepos, SEEK_SET);
+ if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
+ return false;
native_relocs = (Elf_External_Rel *)
bfd_alloc (abfd, asect->reloc_count * sizeof (Elf_External_Rel));
- bfd_read ((PTR) native_relocs,
- sizeof (Elf_External_Rel), asect->reloc_count, abfd);
+ if (!native_relocs)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ if (bfd_read ((PTR) native_relocs,
+ sizeof (Elf_External_Rel), asect->reloc_count, abfd)
+ != sizeof (Elf_External_Rel) * asect->reloc_count)
+ return false;
reloc_cache = (arelent *)
bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent)));
if (!reloc_cache)
{
- bfd_error = no_memory;
+ bfd_set_error (bfd_error_no_memory);
return false;
}
/* Get the offset of the start of the segment we are relocating to read in
the implicit addend. */
- data_hdr = &elf_section_data(asect)->this_hdr;
+ data_hdr = &elf_section_data (asect)->this_hdr;
data_off = data_hdr->sh_offset;
data_max = data_hdr->sh_size - sizeof (buf) + 1;
/* non-relocatable, so the offset a virtual address */
cache_ptr->address = dst.r_offset;
}
- /* ELF_R_SYM(dst.r_info) is the symbol table offset...
- -1 is to skip the dummy symbol table entry */
- cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM (dst.r_info) - 1;
- BFD_ASSERT (dst.r_offset <= data_max);
- if (bfd_seek (abfd, data_off + dst.r_offset, SEEK_SET) != 0
- || bfd_read ((PTR) buf, sizeof (buf), 1, abfd) != sizeof (buf))
+
+ /* ELF_R_SYM(dst.r_info) is the symbol table offset. An offset
+ of zero points to the dummy symbol, which was not read into
+ the symbol table SYMBOLS. */
+ if (ELF_R_SYM (dst.r_info) == 0)
+ cache_ptr->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr;
+ else
{
- bfd_error = system_call_error;
- return false;
- }
+ asymbol *s;
- cache_ptr->addend = (*abfd->xvec->bfd_getx_signed_32) ((bfd_byte *) buf);
+ cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM (dst.r_info) - 1;
+
+ /* Translate any ELF section symbol into a BFD section
+ symbol. */
+ s = *(cache_ptr->sym_ptr_ptr);
+ if (s->flags & BSF_SECTION_SYM)
+ {
+ cache_ptr->sym_ptr_ptr = s->section->symbol_ptr_ptr;
+ s = *cache_ptr->sym_ptr_ptr;
+ if (s->name == 0 || s->name[0] == 0)
+ abort ();
+ }
+ }
+ BFD_ASSERT (dst.r_offset <= data_max);
+ cache_ptr->addend = 0;
/* Fill in the cache_ptr->howto field from dst.r_type */
{
return true;
}
-unsigned int
+long
elf_canonicalize_reloc (abfd, section, relptr, symbols)
bfd *abfd;
sec_ptr section;
/* snarfed from coffcode.h */
if (use_rela_p)
- elf_slurp_reloca_table (abfd, section, symbols);
+ {
+ if (! elf_slurp_reloca_table (abfd, section, symbols))
+ return -1;
+ }
else
- elf_slurp_reloc_table (abfd, section, symbols);
+ {
+ if (! elf_slurp_reloc_table (abfd, section, symbols))
+ return -1;
+ }
tblptr = section->relocation;
- if (!tblptr)
- return 0;
for (; count++ < section->reloc_count;)
*relptr++ = tblptr++;
return section->reloc_count;
}
-unsigned int
-DEFUN (elf_get_symtab, (abfd, alocation),
- bfd * abfd AND
- asymbol ** alocation)
+long
+elf_get_symtab (abfd, alocation)
+ bfd *abfd;
+ asymbol **alocation;
{
+ long symcount = elf_slurp_symbol_table (abfd, alocation, false);
- if (!elf_slurp_symbol_table (abfd, alocation))
- return 0;
- else
- return bfd_get_symcount (abfd);
+ if (symcount >= 0)
+ bfd_get_symcount (abfd) = symcount;
+ return symcount;
+}
+
+long
+elf_canonicalize_dynamic_symtab (abfd, alocation)
+ bfd *abfd;
+ asymbol **alocation;
+{
+ return elf_slurp_symbol_table (abfd, alocation, true);
}
asymbol *
-DEFUN (elf_make_empty_symbol, (abfd),
- bfd * abfd)
+elf_make_empty_symbol (abfd)
+ bfd *abfd;
{
elf_symbol_type *newsym;
newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type));
if (!newsym)
{
- bfd_error = no_memory;
+ bfd_set_error (bfd_error_no_memory);
return NULL;
}
else
}
void
-DEFUN (elf_get_symbol_info, (ignore_abfd, symbol, ret),
- bfd * ignore_abfd AND
- asymbol * symbol AND
- symbol_info * ret)
+elf_get_symbol_info (ignore_abfd, symbol, ret)
+ bfd *ignore_abfd;
+ asymbol *symbol;
+ symbol_info *ret;
{
bfd_symbol_info (symbol, ret);
}
void
-DEFUN (elf_print_symbol, (ignore_abfd, filep, symbol, how),
- bfd * ignore_abfd AND
- PTR filep AND
- asymbol * symbol AND
- bfd_print_symbol_type how)
+elf_print_symbol (ignore_abfd, filep, symbol, how)
+ bfd *ignore_abfd;
+ PTR filep;
+ asymbol *symbol;
+ bfd_print_symbol_type how;
{
FILE *file = (FILE *) filep;
switch (how)
}
alent *
-DEFUN (elf_get_lineno, (ignore_abfd, symbol),
- bfd * ignore_abfd AND
- asymbol * symbol)
+elf_get_lineno (ignore_abfd, symbol)
+ bfd *ignore_abfd;
+ asymbol *symbol;
{
fprintf (stderr, "elf_get_lineno unimplemented\n");
fflush (stderr);
}
boolean
-DEFUN (elf_set_arch_mach, (abfd, arch, machine),
- bfd * abfd AND
- enum bfd_architecture arch AND
- unsigned long machine)
-{
- /* Allow any architecture to be supported by the elf backend */
- switch (arch)
- {
- case bfd_arch_unknown: /* EM_NONE */
- case bfd_arch_sparc: /* EM_SPARC */
- case bfd_arch_i386: /* EM_386 */
- case bfd_arch_m68k: /* EM_68K */
- case bfd_arch_m88k: /* EM_88K */
- case bfd_arch_i860: /* EM_860 */
- case bfd_arch_mips: /* EM_MIPS (MIPS R3000) */
- case bfd_arch_hppa: /* EM_HPPA (HP PA_RISC) */
- return bfd_default_set_arch_mach (abfd, arch, machine);
- default:
- return false;
- }
+elf_set_arch_mach (abfd, arch, machine)
+ bfd *abfd;
+ enum bfd_architecture arch;
+ unsigned long machine;
+{
+ /* If this isn't the right architecture for this backend, and this
+ isn't the generic backend, fail. */
+ if (arch != get_elf_backend_data (abfd)->arch
+ && arch != bfd_arch_unknown
+ && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
+ return false;
+
+ return bfd_default_set_arch_mach (abfd, arch, machine);
}
boolean
-DEFUN (elf_find_nearest_line, (abfd,
- section,
- symbols,
- offset,
- filename_ptr,
- functionname_ptr,
- line_ptr),
- bfd * abfd AND
- asection * section AND
- asymbol ** symbols AND
- bfd_vma offset AND
- CONST char **filename_ptr AND
- CONST char **functionname_ptr AND
- unsigned int *line_ptr)
+elf_find_nearest_line (abfd,
+ section,
+ symbols,
+ offset,
+ filename_ptr,
+ functionname_ptr,
+ line_ptr)
+ bfd *abfd;
+ asection *section;
+ asymbol **symbols;
+ bfd_vma offset;
+ CONST char **filename_ptr;
+ CONST char **functionname_ptr;
+ unsigned int *line_ptr;
{
return false;
}
int
-DEFUN (elf_sizeof_headers, (abfd, reloc),
- bfd * abfd AND
- boolean reloc)
+elf_sizeof_headers (abfd, reloc)
+ bfd *abfd;
+ boolean reloc;
{
- fprintf (stderr, "elf_sizeof_headers unimplemented\n");
- fflush (stderr);
- BFD_FAIL ();
- return 0;
+ int ret;
+
+ ret = sizeof (Elf_External_Ehdr);
+ if (! reloc)
+ ret += get_program_header_size (abfd);
+ return ret;
}
boolean
-DEFUN (elf_set_section_contents, (abfd, section, location, offset, count),
- bfd * abfd AND
- sec_ptr section AND
- PTR location AND
- file_ptr offset AND
- bfd_size_type count)
+elf_set_section_contents (abfd, section, location, offset, count)
+ bfd *abfd;
+ sec_ptr section;
+ PTR location;
+ file_ptr offset;
+ bfd_size_type count;
{
Elf_Internal_Shdr *hdr;
- if (abfd->output_has_begun == false) /* set by bfd.c handler? */
- {
- /* do setup calculations (FIXME) */
- prep_headers (abfd);
- elf_compute_section_file_positions (abfd);
- abfd->output_has_begun = true;
- }
+ if (! abfd->output_has_begun
+ && ! elf_compute_section_file_positions (abfd,
+ (struct bfd_link_info *) NULL))
+ return false;
- hdr = &elf_section_data(section)->this_hdr;
+ hdr = &elf_section_data (section)->this_hdr;
if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1)
return false;
}
void
-DEFUN (elf_no_info_to_howto, (abfd, cache_ptr, dst),
- bfd * abfd AND
- arelent * cache_ptr AND
- Elf_Internal_Rela * dst)
+elf_no_info_to_howto (abfd, cache_ptr, dst)
+ bfd *abfd;
+ arelent *cache_ptr;
+ Elf_Internal_Rela *dst;
{
fprintf (stderr, "elf RELA relocation support for target machine unimplemented\n");
fflush (stderr);
}
void
-DEFUN (elf_no_info_to_howto_rel, (abfd, cache_ptr, dst),
- bfd * abfd AND
- arelent * cache_ptr AND
- Elf_Internal_Rel * dst)
+elf_no_info_to_howto_rel (abfd, cache_ptr, dst)
+ bfd *abfd;
+ arelent *cache_ptr;
+ Elf_Internal_Rel *dst;
{
fprintf (stderr, "elf REL relocation support for target machine unimplemented\n");
fflush (stderr);
BFD_FAIL ();
}
-
\f
+
/* Core file support */
#ifdef HAVE_PROCFS /* Some core file support requires host /proc files */
#include <sys/procfs.h>
#else
-#define bfd_prstatus(abfd, descdata, descsz, filepos) /* Define away */
-#define bfd_fpregset(abfd, descdata, descsz, filepos) /* Define away */
-#define bfd_prpsinfo(abfd, descdata, descsz, filepos) /* Define away */
+#define bfd_prstatus(abfd, descdata, descsz, filepos) true
+#define bfd_fpregset(abfd, descdata, descsz, filepos) true
+#define bfd_prpsinfo(abfd, descdata, descsz, filepos) true
#endif
#ifdef HAVE_PROCFS
-static void
-DEFUN (bfd_prstatus, (abfd, descdata, descsz, filepos),
- bfd * abfd AND
- char *descdata AND
- int descsz AND
- long filepos)
+static boolean
+bfd_prstatus (abfd, descdata, descsz, filepos)
+ bfd *abfd;
+ char *descdata;
+ int descsz;
+ long filepos;
{
asection *newsect;
prstatus_t *status = (prstatus_t *) 0;
if (descsz == sizeof (prstatus_t))
{
newsect = bfd_make_section (abfd, ".reg");
+ if (newsect == NULL)
+ return false;
newsect->_raw_size = sizeof (status->pr_reg);
newsect->filepos = filepos + (long) &status->pr_reg;
newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS;
memcpy (core_prstatus (abfd), descdata, descsz);
}
}
+ return true;
}
/* Stash a copy of the prpsinfo structure away for future use. */
-static void
-DEFUN (bfd_prpsinfo, (abfd, descdata, descsz, filepos),
- bfd * abfd AND
- char *descdata AND
- int descsz AND
- long filepos)
+static boolean
+bfd_prpsinfo (abfd, descdata, descsz, filepos)
+ bfd *abfd;
+ char *descdata;
+ int descsz;
+ long filepos;
{
- asection *newsect;
-
if (descsz == sizeof (prpsinfo_t))
{
- if ((core_prpsinfo (abfd) = bfd_alloc (abfd, descsz)) != NULL)
+ if ((core_prpsinfo (abfd) = bfd_alloc (abfd, descsz)) == NULL)
{
- memcpy (core_prpsinfo (abfd), descdata, descsz);
+ bfd_set_error (bfd_error_no_memory);
+ return false;
}
+ memcpy (core_prpsinfo (abfd), descdata, descsz);
}
+ return true;
}
-static void
-DEFUN (bfd_fpregset, (abfd, descdata, descsz, filepos),
- bfd * abfd AND
- char *descdata AND
- int descsz AND
- long filepos)
+static boolean
+bfd_fpregset (abfd, descdata, descsz, filepos)
+ bfd *abfd;
+ char *descdata;
+ int descsz;
+ long filepos;
{
asection *newsect;
newsect = bfd_make_section (abfd, ".reg2");
+ if (newsect == NULL)
+ return false;
newsect->_raw_size = descsz;
newsect->filepos = filepos;
newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS;
newsect->alignment_power = 2;
+ return true;
}
#endif /* HAVE_PROCFS */
it exists. */
char *
-DEFUN (elf_core_file_failing_command, (abfd),
- bfd * abfd)
+elf_core_file_failing_command (abfd)
+ bfd *abfd;
{
#ifdef HAVE_PROCFS
if (core_prpsinfo (abfd))
*/
int
-DEFUN (elf_core_file_failing_signal, (abfd),
- bfd * abfd)
+elf_core_file_failing_signal (abfd)
+ bfd *abfd;
{
#ifdef HAVE_PROCFS
if (core_prstatus (abfd))
*/
boolean
-DEFUN (elf_core_file_matches_executable_p, (core_bfd, exec_bfd),
- bfd * core_bfd AND
- bfd * exec_bfd)
+elf_core_file_matches_executable_p (core_bfd, exec_bfd)
+ bfd *core_bfd;
+ bfd *exec_bfd;
{
#ifdef HAVE_PROCFS
char *corename;
if (core_bfd->xvec != exec_bfd->xvec)
{
- bfd_error = system_call_error;
+ bfd_set_error (bfd_error_system_call);
return false;
}
*/
static boolean
-DEFUN (elf_corefile_note, (abfd, hdr),
- bfd * abfd AND
- Elf_Internal_Phdr * hdr)
+elf_corefile_note (abfd, hdr)
+ bfd *abfd;
+ Elf_Internal_Phdr *hdr;
{
Elf_External_Note *x_note_p; /* Elf note, external form */
Elf_Internal_Note i_note; /* Elf note, internal form */
asection *newsect;
if (hdr->p_filesz > 0
- && (buf = (char *) bfd_xmalloc (hdr->p_filesz)) != NULL
+ && (buf = (char *) malloc (hdr->p_filesz)) != NULL
&& bfd_seek (abfd, hdr->p_offset, SEEK_SET) != -1
&& bfd_read ((PTR) buf, hdr->p_filesz, 1, abfd) == hdr->p_filesz)
{
{
case NT_PRSTATUS:
/* process descdata as prstatus info */
- bfd_prstatus (abfd, descdata, i_note.descsz, filepos);
+ if (! bfd_prstatus (abfd, descdata, i_note.descsz, filepos))
+ return false;
sectname = ".prstatus";
break;
case NT_FPREGSET:
/* process descdata as fpregset info */
- bfd_fpregset (abfd, descdata, i_note.descsz, filepos);
+ if (! bfd_fpregset (abfd, descdata, i_note.descsz, filepos))
+ return false;
sectname = ".fpregset";
break;
case NT_PRPSINFO:
/* process descdata as prpsinfo */
- bfd_prpsinfo (abfd, descdata, i_note.descsz, filepos);
+ if (! bfd_prpsinfo (abfd, descdata, i_note.descsz, filepos))
+ return false;
sectname = ".prpsinfo";
break;
default:
if (sectname != NULL)
{
newsect = bfd_make_section (abfd, sectname);
+ if (newsect == NULL)
+ return false;
newsect->_raw_size = i_note.descsz;
newsect->filepos = filepos;
newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS;
{
free (buf);
}
+ else if (hdr->p_filesz > 0)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
return true;
}
*/
bfd_target *
-DEFUN (elf_core_file_p, (abfd), bfd * abfd)
+elf_core_file_p (abfd)
+ bfd *abfd;
{
Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
Elf_External_Phdr x_phdr; /* Program header table entry, external form */
Elf_Internal_Phdr *i_phdrp; /* Program header table, internal form */
unsigned int phindex;
+ struct elf_backend_data *ebd;
/* Read in the ELF header in external format. */
if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr))
{
- bfd_error = system_call_error;
+ if (bfd_get_error () != bfd_error_system_call)
+ bfd_set_error (bfd_error_wrong_format);
return NULL;
}
if (elf_file_p (&x_ehdr) == false)
{
wrong:
- bfd_error = wrong_format;
+ bfd_set_error (bfd_error_wrong_format);
return NULL;
}
(struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
if (elf_tdata (abfd) == NULL)
{
- bfd_error = no_memory;
+ bfd_set_error (bfd_error_no_memory);
return NULL;
}
elf_debug_file (i_ehdrp);
#endif
+ ebd = get_elf_backend_data (abfd);
+
+ /* Check that the ELF e_machine field matches what this particular
+ BFD format expects. */
+ if (ebd->elf_machine_code != i_ehdrp->e_machine)
+ {
+ bfd_target **target_ptr;
+
+ if (ebd->elf_machine_code != EM_NONE)
+ goto wrong;
+
+ /* This is the generic ELF target. Let it match any ELF target
+ for which we do not have a specific backend. */
+ for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++)
+ {
+ struct elf_backend_data *back;
+
+ if ((*target_ptr)->flavour != bfd_target_elf_flavour)
+ continue;
+ back = (struct elf_backend_data *) (*target_ptr)->backend_data;
+ if (back->elf_machine_code == i_ehdrp->e_machine)
+ {
+ /* target_ptr is an ELF backend which matches this
+ object file, so reject the generic ELF target. */
+ goto wrong;
+ }
+ }
+ }
+
/* If there is no program header, or the type is not a core file, then
we are hosed. */
if (i_ehdrp->e_phoff == 0 || i_ehdrp->e_type != ET_CORE)
bfd_alloc (abfd, sizeof (*i_phdrp) * i_ehdrp->e_phnum);
if (!i_phdrp)
{
- bfd_error = no_memory;
+ bfd_set_error (bfd_error_no_memory);
return NULL;
}
if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1)
- {
- bfd_error = system_call_error;
- return NULL;
- }
+ return NULL;
for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++)
{
if (bfd_read ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd)
!= sizeof (x_phdr))
- {
- bfd_error = system_call_error;
- return NULL;
- }
+ return NULL;
elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex);
}
bfd_section_from_phdr (abfd, i_phdrp + phindex, phindex);
if ((i_phdrp + phindex)->p_type == PT_NOTE)
{
- elf_corefile_note (abfd, i_phdrp + phindex);
+ if (! elf_corefile_note (abfd, i_phdrp + phindex))
+ return NULL;
}
}
return abfd->xvec;
}
+\f
+/* ELF linker code. */
+
+static boolean elf_link_add_object_symbols
+ PARAMS ((bfd *, struct bfd_link_info *));
+static boolean elf_link_add_archive_symbols
+ PARAMS ((bfd *, struct bfd_link_info *));
+static INLINE boolean elf_link_record_dynamic_symbol
+ PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
+static boolean elf_link_create_dynamic_sections
+ PARAMS ((bfd *, struct bfd_link_info *));
+static boolean elf_adjust_dynamic_symbol
+ PARAMS ((struct elf_link_hash_entry *, PTR));
+
+/* Given an ELF BFD, add symbols to the global hash table as
+ appropriate. */
+
+boolean
+elf_bfd_link_add_symbols (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
+{
+ switch (bfd_get_format (abfd))
+ {
+ case bfd_object:
+ return elf_link_add_object_symbols (abfd, info);
+ case bfd_archive:
+ return elf_link_add_archive_symbols (abfd, info);
+ default:
+ bfd_set_error (bfd_error_wrong_format);
+ return false;
+ }
+}
+
+/* Add symbols from an ELF archive file to the linker hash table. We
+ don't use _bfd_generic_link_add_archive_symbols because of a
+ problem which arises on UnixWare. The UnixWare libc.so is an
+ archive which includes an entry libc.so.1 which defines a bunch of
+ symbols. The libc.so archive also includes a number of other
+ object files, which also define symbols, some of which are the same
+ as those defined in libc.so.1. Correct linking requires that we
+ consider each object file in turn, and include it if it defines any
+ symbols we need. _bfd_generic_link_add_archive_symbols does not do
+ this; it looks through the list of undefined symbols, and includes
+ any object file which defines them. When this algorithm is used on
+ UnixWare, it winds up pulling in libc.so.1 early and defining a
+ bunch of symbols. This means that some of the other objects in the
+ archive are not included in the link, which is incorrect since they
+ precede libc.so.1 in the archive.
+
+ Fortunately, ELF archive handling is simpler than that done by
+ _bfd_generic_link_add_archive_symbols, which has to allow for a.out
+ oddities. In ELF, if we find a symbol in the archive map, and the
+ symbol is currently undefined, we know that we must pull in that
+ object file.
+
+ Unfortunately, we do have to make multiple passes over the symbol
+ table until nothing further is resolved. */
+
+static boolean
+elf_link_add_archive_symbols (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
+{
+ symindex c;
+ boolean *defined = NULL;
+ boolean *included = NULL;
+ carsym *symdefs;
+ boolean loop;
+
+ if (! bfd_has_map (abfd))
+ {
+ bfd_set_error (bfd_error_no_symbols);
+ return false;
+ }
+
+ /* Keep track of all symbols we know to be already defined, and all
+ files we know to be already included. This is to speed up the
+ second and subsequent passes. */
+ c = bfd_ardata (abfd)->symdef_count;
+ if (c == 0)
+ return true;
+ defined = (boolean *) malloc (c * sizeof (boolean));
+ included = (boolean *) malloc (c * sizeof (boolean));
+ if (defined == (boolean *) NULL || included == (boolean *) NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
+ }
+ memset (defined, 0, c * sizeof (boolean));
+ memset (included, 0, c * sizeof (boolean));
+
+ symdefs = bfd_ardata (abfd)->symdefs;
+
+ do
+ {
+ file_ptr last;
+ symindex i;
+ carsym *symdef;
+ carsym *symdefend;
+
+ loop = false;
+ last = -1;
+
+ symdef = symdefs;
+ symdefend = symdef + c;
+ for (i = 0; symdef < symdefend; symdef++, i++)
+ {
+ struct elf_link_hash_entry *h;
+ bfd *element;
+ struct bfd_link_hash_entry *undefs_tail;
+ symindex mark;
+
+ if (defined[i] || included[i])
+ continue;
+ if (symdef->file_offset == last)
+ {
+ included[i] = true;
+ continue;
+ }
+
+ h = elf_link_hash_lookup (elf_hash_table (info), symdef->name,
+ false, false, false);
+ if (h == (struct elf_link_hash_entry *) NULL)
+ continue;
+ if (h->root.type != bfd_link_hash_undefined)
+ {
+ defined[i] = true;
+ continue;
+ }
+
+ /* We need to include this archive member. */
+
+ element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset);
+ if (element == (bfd *) NULL)
+ goto error_return;
+
+ if (! bfd_check_format (element, bfd_object))
+ goto error_return;
+
+ /* Doublecheck that we have not included this object
+ already--it should be impossible, but there may be
+ something wrong with the archive. */
+ if (element->archive_pass != 0)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ goto error_return;
+ }
+ element->archive_pass = 1;
+
+ undefs_tail = info->hash->undefs_tail;
+
+ if (! (*info->callbacks->add_archive_element) (info, element,
+ symdef->name))
+ goto error_return;
+ if (! elf_link_add_object_symbols (element, info))
+ goto error_return;
+
+ /* If there are any new undefined symbols, we need to make
+ another pass through the archive in order to see whether
+ they can be defined. FIXME: This isn't perfect, because
+ common symbols wind up on undefs_tail and because an
+ undefined symbol which is defined later on in this pass
+ does not require another pass. This isn't a bug, but it
+ does make the code less efficient than it could be. */
+ if (undefs_tail != info->hash->undefs_tail)
+ loop = true;
+
+ /* Look backward to mark all symbols from this object file
+ which we have already seen in this pass. */
+ mark = i;
+ do
+ {
+ included[mark] = true;
+ if (mark == 0)
+ break;
+ --mark;
+ }
+ while (symdefs[mark].file_offset == symdef->file_offset);
+
+ /* We mark subsequent symbols from this object file as we go
+ on through the loop. */
+ last = symdef->file_offset;
+ }
+ }
+ while (loop);
+
+ free (defined);
+ free (included);
+
+ return true;
+
+ error_return:
+ if (defined != (boolean *) NULL)
+ free (defined);
+ if (included != (boolean *) NULL)
+ free (included);
+ return false;
+}
+
+/* Record a new dynamic symbol. We record the dynamic symbols as we
+ read the input files, since we need to have a list of all of them
+ before we can determine the final sizes of the output sections. */
+
+static INLINE boolean
+elf_link_record_dynamic_symbol (info, h)
+ struct bfd_link_info *info;
+ struct elf_link_hash_entry *h;
+{
+ if (h->dynindx == -1)
+ {
+ h->dynindx = elf_hash_table (info)->dynsymcount;
+ ++elf_hash_table (info)->dynsymcount;
+ h->dynstr_index = bfd_add_to_strtab (elf_hash_table (info)->dynobj,
+ elf_hash_table (info)->dynstr,
+ h->root.root.string);
+ if (h->dynstr_index == (unsigned long) -1)
+ return false;
+ }
+
+ return true;
+}
+
+/* Add symbols from an ELF object file to the linker hash table. */
+
+static boolean
+elf_link_add_object_symbols (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
+{
+ boolean (*add_symbol_hook) PARAMS ((bfd *, struct bfd_link_info *,
+ const Elf_Internal_Sym *,
+ const char **, flagword *,
+ asection **, bfd_vma *));
+ boolean collect;
+ Elf_Internal_Shdr *hdr;
+ size_t symcount;
+ size_t extsymcount;
+ Elf_External_Sym *buf = NULL;
+ struct elf_link_hash_entry **sym_hash;
+ boolean dynamic;
+ Elf_External_Dyn *dynbuf = NULL;
+ struct elf_link_hash_entry *weaks;
+ Elf_External_Sym *esym;
+ Elf_External_Sym *esymend;
+
+ add_symbol_hook = get_elf_backend_data (abfd)->elf_add_symbol_hook;
+ collect = get_elf_backend_data (abfd)->collect;
+
+ hdr = &elf_tdata (abfd)->symtab_hdr;
+ symcount = hdr->sh_size / sizeof (Elf_External_Sym);
+
+ /* The sh_info field of the symtab header tells us where the
+ external symbols start. We don't care about the local symbols at
+ this point. */
+ extsymcount = symcount - hdr->sh_info;
+
+ buf = (Elf_External_Sym *) malloc (extsymcount * sizeof (Elf_External_Sym));
+ if (buf == NULL && extsymcount != 0)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
+ }
+
+ /* We store a pointer to the hash table entry for each external
+ symbol. */
+ sym_hash = ((struct elf_link_hash_entry **)
+ bfd_alloc (abfd,
+ extsymcount * sizeof (struct elf_link_hash_entry *)));
+ if (sym_hash == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
+ }
+ elf_sym_hashes (abfd) = sym_hash;
+
+ if (elf_elfheader (abfd)->e_type != ET_DYN)
+ dynamic = false;
+ else
+ {
+ asection *s;
+ const char *name;
+ unsigned long strindex;
+
+ dynamic = true;
+
+ /* You can't use -r against a dynamic object. There's no hope
+ of using a dynamic object which does not exactly match the
+ format of the output file. */
+ if (info->relocateable
+ || info->hash->creator != abfd->xvec)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ goto error_return;
+ }
+
+ /* Find the name to use in a DT_NEEDED entry that refers to this
+ object. If the object has a DT_SONAME entry, we use it.
+ Otherwise, we use the file name. */
+ name = bfd_get_filename (abfd);
+ s = bfd_get_section_by_name (abfd, ".dynamic");
+ if (s != NULL)
+ {
+ Elf_External_Dyn *extdyn;
+ Elf_External_Dyn *extdynend;
+
+ dynbuf = (Elf_External_Dyn *) malloc (s->_raw_size);
+ if (dynbuf == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
+ }
+
+ if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf,
+ (file_ptr) 0, s->_raw_size))
+ goto error_return;
+
+ extdyn = dynbuf;
+ extdynend = extdyn + s->_raw_size / sizeof (Elf_External_Dyn);
+ for (; extdyn < extdynend; extdyn++)
+ {
+ Elf_Internal_Dyn dyn;
+
+ elf_swap_dyn_in (abfd, extdyn, &dyn);
+ if (dyn.d_tag == DT_SONAME)
+ {
+ int elfsec;
+ unsigned long link;
+
+ elfsec = elf_section_from_bfd_section (abfd, s);
+ if (elfsec == -1)
+ goto error_return;
+ link = elf_elfsections (abfd)[elfsec]->sh_link;
+ name = elf_string_from_elf_section (abfd, link,
+ dyn.d_un.d_val);
+ if (name == NULL)
+ goto error_return;
+
+ break;
+ }
+ }
+
+ free (dynbuf);
+ dynbuf = NULL;
+ }
+
+ /* We do not want to include any of the sections in a dynamic
+ object in the output file. We hack by simply clobbering the
+ list of sections in the BFD. This could be handled more
+ cleanly by, say, a new section flag; the existing
+ SEC_NEVER_LOAD flag is not the one we want, because that one
+ still implies that the section takes up space in the output
+ file. */
+ abfd->sections = NULL;
+
+ /* If this is the first dynamic object found in the link, create
+ the special sections required for dynamic linking. We need
+ to put them somewhere, and attaching them to the first
+ dynamic object is as good place as any. */
+ if (elf_hash_table (info)->dynobj == NULL)
+ {
+ if (! elf_link_create_dynamic_sections (abfd, info))
+ goto error_return;
+ elf_hash_table (info)->dynobj = abfd;
+ }
+
+ /* Add a DT_NEEDED entry for this dynamic object. */
+ strindex = bfd_add_to_strtab (abfd,
+ elf_hash_table (info)->dynstr,
+ name);
+
+ if (strindex == (unsigned long) -1)
+ goto error_return;
+ if (! elf_add_dynamic_entry (info, DT_NEEDED, strindex))
+ goto error_return;
+ }
+
+ if (bfd_seek (abfd,
+ hdr->sh_offset + hdr->sh_info * sizeof (Elf_External_Sym),
+ SEEK_SET) != 0
+ || (bfd_read ((PTR) buf, sizeof (Elf_External_Sym), extsymcount, abfd)
+ != extsymcount * sizeof (Elf_External_Sym)))
+ goto error_return;
+
+ weaks = NULL;
+
+ esymend = buf + extsymcount;
+ for (esym = buf; esym < esymend; esym++, sym_hash++)
+ {
+ Elf_Internal_Sym sym;
+ int bind;
+ bfd_vma value;
+ asection *sec;
+ flagword flags;
+ const char *name;
+ struct elf_link_hash_entry *h = NULL;
+ boolean definition;
+
+ elf_swap_symbol_in (abfd, esym, &sym);
+
+ flags = BSF_NO_FLAGS;
+ sec = NULL;
+ value = sym.st_value;
+ *sym_hash = NULL;
+
+ bind = ELF_ST_BIND (sym.st_info);
+ if (bind == STB_LOCAL)
+ {
+ /* This should be impossible, since ELF requires that all
+ global symbols follow all local symbols, and that sh_info
+ point to the first global symbol. */
+ bfd_set_error (bfd_error_bad_value);
+ goto error_return;
+ }
+ else if (bind == STB_GLOBAL)
+ flags = BSF_GLOBAL;
+ else if (bind == STB_WEAK)
+ flags = BSF_WEAK;
+ else
+ {
+ /* Leave it up to the processor backend. */
+ }
+
+ if (sym.st_shndx == SHN_UNDEF)
+ sec = &bfd_und_section;
+ else if (sym.st_shndx > 0 && sym.st_shndx < SHN_LORESERVE)
+ {
+ sec = section_from_elf_index (abfd, sym.st_shndx);
+ if (sec == NULL)
+ goto error_return;
+ value -= sec->vma;
+ }
+ else if (sym.st_shndx == SHN_ABS)
+ sec = &bfd_abs_section;
+ else if (sym.st_shndx == SHN_COMMON)
+ {
+ sec = &bfd_com_section;
+ /* What ELF calls the size we call the value. What ELF
+ calls the value we call the alignment. */
+ value = sym.st_size;
+ }
+ else
+ {
+ /* Leave it up to the processor backend. */
+ }
+
+ name = elf_string_from_elf_section (abfd, hdr->sh_link, sym.st_name);
+ if (name == (const char *) NULL)
+ goto error_return;
+
+ if (add_symbol_hook)
+ {
+ if (! (*add_symbol_hook) (abfd, info, &sym, &name, &flags, &sec,
+ &value))
+ goto error_return;
+
+ /* The hook function sets the name to NULL if this symbol
+ should be skipped for some reason. */
+ if (name == (const char *) NULL)
+ continue;
+ }
+
+ /* Sanity check that all possibilities were handled. */
+ if (flags == BSF_NO_FLAGS || sec == (asection *) NULL)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ goto error_return;
+ }
+
+ if (sec == &bfd_und_section
+ || bfd_is_com_section (sec))
+ definition = false;
+ else
+ definition = true;
+
+ if (info->hash->creator->flavour == bfd_target_elf_flavour)
+ {
+ /* We need to look up the symbol now in order to get some of
+ the dynamic object handling right. We pass the hash
+ table entry in to _bfd_generic_link_add_one_symbol so
+ that it does not have to look it up again. */
+ h = elf_link_hash_lookup (elf_hash_table (info), name,
+ true, false, false);
+ if (h == NULL)
+ goto error_return;
+ *sym_hash = h;
+
+ /* If we are looking at a dynamic object, and this is a
+ definition, we need to see if it has already been defined
+ by some other object. If it has, we want to use the
+ existing definition, and we do not want to report a
+ multiple symbol definition error; we do this by
+ clobbering sec to be bfd_und_section. */
+ if (dynamic && definition)
+ {
+ if (h->root.type == bfd_link_hash_defined)
+ sec = &bfd_und_section;
+ }
+
+ /* Similarly, if we are not looking at a dynamic object, and
+ we have a definition, we want to override any definition
+ we may have from a dynamic object. Symbols from regular
+ files always take precedence over symbols from dynamic
+ objects, even if they are defined after the dynamic
+ object in the link. */
+ if (! dynamic
+ && definition
+ && h->root.type == bfd_link_hash_defined
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
+ && (bfd_get_flavour (h->root.u.def.section->owner)
+ == bfd_target_elf_flavour)
+ && (elf_elfheader (h->root.u.def.section->owner)->e_type
+ == ET_DYN))
+ {
+ /* Change the hash table entry to undefined, and let
+ _bfd_generic_link_add_one_symbol do the right thing
+ with the new definition. */
+ h->root.type = bfd_link_hash_undefined;
+ h->root.u.undef.abfd = h->root.u.def.section->owner;
+ }
+ }
+
+ if (! (_bfd_generic_link_add_one_symbol
+ (info, abfd, name, flags, sec, value, (const char *) NULL,
+ false, collect, (struct bfd_link_hash_entry **) sym_hash)))
+ goto error_return;
+
+ if (dynamic
+ && definition
+ && (flags & BSF_WEAK) != 0
+ && ELF_ST_TYPE (sym.st_info) != STT_FUNC
+ && (*sym_hash)->weakdef == NULL)
+ {
+ /* Keep a list of all weak defined non function symbols from
+ a dynamic object, using the weakdef field. Later in this
+ function we will set the weakdef field to the correct
+ value. We only put non-function symbols from dynamic
+ objects on this list, because that happens to be the only
+ time we need to know the normal symbol corresponding to a
+ weak symbol, and the information is time consuming to
+ figure out. If the weakdef field is not already NULL,
+ then this symbol was already defined by some previous
+ dynamic object, and we will be using that previous
+ definition anyhow. */
+
+ (*sym_hash)->weakdef = weaks;
+ weaks = *sym_hash;
+ }
+
+ if (info->hash->creator->flavour == bfd_target_elf_flavour)
+ {
+ int old_flags;
+ boolean dynsym;
+ int new_flag;
+
+ /* Remember the symbol size, type and alignment. */
+ if (sym.st_size != 0)
+ {
+ /* FIXME: We should probably somehow give a warning if
+ the symbol size changes. */
+ h->size = sym.st_size;
+ }
+ if (sym.st_shndx == SHN_COMMON
+ && sym.st_value > h->align)
+ h->align = sym.st_value;
+ if (ELF_ST_TYPE (sym.st_info) != STT_NOTYPE)
+ {
+ /* FIXME: We should probably somehow give a warning if
+ the symbol type changes. */
+ h->type = ELF_ST_TYPE (sym.st_info);
+ }
+
+ /* Set a flag in the hash table entry indicating the type of
+ reference or definition we just found. Keep a count of
+ the number of dynamic symbols we find. A dynamic symbol
+ is one which is referenced or defined by both a regular
+ object and a shared object, or one which is referenced or
+ defined by more than one shared object. */
+ old_flags = h->elf_link_hash_flags;
+ dynsym = false;
+ if (! dynamic)
+ {
+ if (! definition)
+ new_flag = ELF_LINK_HASH_REF_REGULAR;
+ else
+ new_flag = ELF_LINK_HASH_DEF_REGULAR;
+ if ((old_flags & (ELF_LINK_HASH_DEF_DYNAMIC
+ | ELF_LINK_HASH_REF_DYNAMIC)) != 0)
+ dynsym = true;
+ }
+ else
+ {
+ if (! definition)
+ new_flag = ELF_LINK_HASH_REF_DYNAMIC;
+ else
+ new_flag = ELF_LINK_HASH_DEF_DYNAMIC;
+ if ((old_flags & new_flag) != 0)
+ {
+ if (! definition)
+ new_flag = ELF_LINK_HASH_REF_DYNAMIC_MULTIPLE;
+ else
+ new_flag = ELF_LINK_HASH_DEF_DYNAMIC_MULTIPLE;
+ dynsym = true;
+ }
+ else
+ {
+ if ((old_flags & (ELF_LINK_HASH_DEF_REGULAR
+ | ELF_LINK_HASH_REF_REGULAR)) != 0)
+ dynsym = true;
+ }
+ }
+
+ h->elf_link_hash_flags |= new_flag;
+ if (dynsym && h->dynindx == -1)
+ {
+ if (! elf_link_record_dynamic_symbol (info, h))
+ goto error_return;
+ }
+ }
+ }
+
+ /* Now set the weakdefs field correctly for all the weak defined
+ symbols we found. The only way to do this is to search all the
+ symbols. Since we only need the information for non functions in
+ dynamic objects, that's the only time we actually put anything on
+ the list WEAKS. We need this information so that if a regular
+ object refers to a symbol defined weakly in a dynamic object, the
+ real symbol in the dynamic object is also put in the dynamic
+ symbols; we also must arrange for both symbols to point to the
+ same memory location. We could handle the general case of symbol
+ aliasing, but a general symbol alias can only be generated in
+ assembler code, handling it correctly would be very time
+ consuming, and other ELF linkers don't handle general aliasing
+ either. */
+ while (weaks != NULL)
+ {
+ struct elf_link_hash_entry *hlook;
+ asection *slook;
+ bfd_vma vlook;
+ struct elf_link_hash_entry **hpp;
+ struct elf_link_hash_entry **hppend;
+
+ hlook = weaks;
+ weaks = hlook->weakdef;
+ hlook->weakdef = NULL;
+
+ BFD_ASSERT (hlook->root.type == bfd_link_hash_defined);
+ slook = hlook->root.u.def.section;
+ vlook = hlook->root.u.def.value;
+
+ hpp = elf_sym_hashes (abfd);
+ hppend = hpp + extsymcount;
+ for (; hpp < hppend; hpp++)
+ {
+ struct elf_link_hash_entry *h;
+
+ h = *hpp;
+ if (h != hlook
+ && h->root.type == bfd_link_hash_defined
+ && h->root.u.def.section == slook
+ && h->root.u.def.value == vlook)
+ {
+ hlook->weakdef = h;
+
+ /* If the weak definition is in the list of dynamic
+ symbols, make sure the real definition is put there
+ as well. */
+ if (hlook->dynindx != -1
+ && h->dynindx == -1)
+ {
+ if (! elf_link_record_dynamic_symbol (info, h))
+ goto error_return;
+ }
+
+ break;
+ }
+ }
+ }
+
+ if (buf != NULL)
+ free (buf);
+
+ return true;
+
+ error_return:
+ if (buf != NULL)
+ free (buf);
+ if (dynbuf != NULL)
+ free (dynbuf);
+ return false;
+}
+
+/* Create some sections which will be filled in with dynamic linking
+ information. The ABFD argument is an input file which is a dynamic
+ object. The dynamic sections take up virtual memory space when the
+ final executable is run, so we need to create them before addresses
+ are assigned to the output sections. We work out the actual
+ contents and size of these sections later. */
+
+static boolean
+elf_link_create_dynamic_sections (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
+{
+ flagword flags;
+ register asection *s;
+ struct elf_link_hash_entry *h;
+ struct elf_backend_data *bed;
+
+ /* Note that we set the SEC_IN_MEMORY flag for all of these
+ sections. */
+ flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
+
+ s = bfd_make_section (abfd, ".interp");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY))
+ return false;
+
+ s = bfd_make_section (abfd, ".dynamic");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags)
+ || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN))
+ return false;
+
+ /* The special symbol _DYNAMIC is always set to the start of the
+ .dynamic section. This call occurs before we have processed the
+ symbols for any dynamic object, so we don't have to worry about
+ overriding a dynamic definition. We could set _DYNAMIC in a
+ linker script, but we only want to define it if we are, in fact,
+ creating a .dynamic section. We don't want to define it if there
+ is no .dynamic section, since on some ELF platforms the start up
+ code examines it to decide how to initialize the process. */
+ h = NULL;
+ if (! (_bfd_generic_link_add_one_symbol
+ (info, abfd, "_DYNAMIC", BSF_GLOBAL, s, (bfd_vma) 0,
+ (const char *) NULL, false, get_elf_backend_data (abfd)->collect,
+ (struct bfd_link_hash_entry **) &h)))
+ return false;
+ h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
+
+ s = bfd_make_section (abfd, ".dynsym");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
+ || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN))
+ return false;
+
+ /* The first .dynsym symbol is a dummy. */
+ elf_hash_table (info)->dynsymcount = 1;
+
+ s = bfd_make_section (abfd, ".dynstr");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY))
+ return false;
+
+ /* Create a strtab to hold the dynamic symbol names. */
+ elf_hash_table (info)->dynstr = bfd_new_strtab (abfd);
+ if (elf_hash_table (info)->dynstr == NULL)
+ return false;
+
+ s = bfd_make_section (abfd, ".hash");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
+ || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN))
+ return false;
+
+ /* Let the backend create the rest of the sections. This lets the
+ backend set the right flags. The backend will normally create
+ the .got and .plt sections. */
+ bed = get_elf_backend_data (abfd);
+ return (*bed->elf_backend_create_dynamic_sections) (abfd, info);
+}
+
+/* Add an entry to the .dynamic table. */
+
+boolean
+elf_add_dynamic_entry (info, tag, val)
+ struct bfd_link_info *info;
+ bfd_vma tag;
+ bfd_vma val;
+{
+ Elf_Internal_Dyn dyn;
+ bfd *dynobj;
+ asection *s;
+ size_t newsize;
+ bfd_byte *newcontents;
+
+ dynobj = elf_hash_table (info)->dynobj;
+
+ s = bfd_get_section_by_name (dynobj, ".dynamic");
+ BFD_ASSERT (s != NULL);
+
+ newsize = s->_raw_size + sizeof (Elf_External_Dyn);
+ if (s->contents == NULL)
+ newcontents = (bfd_byte *) malloc (newsize);
+ else
+ newcontents = (bfd_byte *) realloc (s->contents, newsize);
+ if (newcontents == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+
+ dyn.d_tag = tag;
+ dyn.d_un.d_val = val;
+ elf_swap_dyn_out (dynobj, &dyn,
+ (Elf_External_Dyn *) (newcontents + s->_raw_size));
+
+ s->_raw_size = newsize;
+ s->contents = newcontents;
+
+ return true;
+}
+
+/* Record an assignment to a symbol made by a linker script. We need
+ this in case some dynamic object refers to this symbol. */
+
+/*ARGSUSED*/
+boolean
+NAME(bfd_elf,record_link_assignment) (output_bfd, info, name)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ const char *name;
+{
+ struct elf_link_hash_entry *h;
+
+ /* This is called after we have examined all the input objects. If
+ the symbol does not exist, it merely means that no object refers
+ to it, and we can just ignore it at this point. */
+ h = elf_link_hash_lookup (elf_hash_table (info), name,
+ false, false, false);
+ if (h == NULL)
+ return true;
+
+ h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
+
+ if ((h->elf_link_hash_flags & (ELF_LINK_HASH_DEF_DYNAMIC
+ | ELF_LINK_HASH_REF_DYNAMIC)) != 0
+ && h->dynindx == -1)
+ {
+ if (! elf_link_record_dynamic_symbol (info, h))
+ return false;
+
+ /* If this is a weak defined symbol, and we know a corresponding
+ real symbol from the same dynamic object, make sure the real
+ symbol is also made into a dynamic symbol. */
+ if (h->weakdef != NULL
+ && h->weakdef->dynindx == -1)
+ {
+ if (! elf_link_record_dynamic_symbol (info, h->weakdef))
+ return false;
+ }
+ }
+
+ return true;
+}
+
+/* Array used to determine the number of hash table buckets to use
+ based on the number of symbols there are. If there are fewer than
+ 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets,
+ fewer than 37 we use 17 buckets, and so forth. We never use more
+ than 521 buckets. */
+
+static const size_t elf_buckets[] =
+{
+ 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 0
+};
+
+/* Set up the sizes and contents of the ELF dynamic sections. This is
+ called by the ELF linker emulation before_allocation routine. We
+ must set the sizes of the sections before the linker sets the
+ addresses of the various sections. */
+
+boolean
+NAME(bfd_elf,size_dynamic_sections) (output_bfd, info)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+{
+ bfd *dynobj;
+ size_t dynsymcount;
+ asection *s;
+ Elf_Internal_Sym isym;
+ size_t i;
+ size_t bucketcount;
+ struct elf_backend_data *bed;
+
+ dynobj = elf_hash_table (info)->dynobj;
+ dynsymcount = elf_hash_table (info)->dynsymcount;
+
+ /* If there were no dynamic objects in the link, there is nothing to
+ do here. */
+ if (dynobj == NULL)
+ return true;
+
+ /* Set the size of the .dynsym and .hash sections. We counted the
+ number of dynamic symbols in elf_link_add_object_symbols. We
+ will build the contents of .dynsym and .hash when we build the
+ final symbol table, because until then we do not know the correct
+ value to give the symbols. We built the .dynstr section as we
+ went along in elf_link_add_object_symbols. */
+ s = bfd_get_section_by_name (dynobj, ".dynsym");
+ BFD_ASSERT (s != NULL);
+ s->_raw_size = dynsymcount * sizeof (Elf_External_Sym);
+ s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size);
+ if (s->contents == NULL && s->_raw_size != 0)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+
+ /* The first entry in .dynsym is a dummy symbol. */
+ isym.st_value = 0;
+ isym.st_size = 0;
+ isym.st_name = 0;
+ isym.st_info = 0;
+ isym.st_other = 0;
+ isym.st_shndx = 0;
+ elf_swap_symbol_out (output_bfd, &isym,
+ (Elf_External_Sym *) s->contents);
+
+ for (i = 0; elf_buckets[i] != 0; i++)
+ {
+ bucketcount = elf_buckets[i];
+ if (dynsymcount < elf_buckets[i + 1])
+ break;
+ }
+
+ s = bfd_get_section_by_name (dynobj, ".hash");
+ BFD_ASSERT (s != NULL);
+ s->_raw_size = (2 + bucketcount + dynsymcount) * (ARCH_SIZE / 8);
+ s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size);
+ if (s->contents == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ memset (s->contents, 0, s->_raw_size);
+
+ put_word (output_bfd, bucketcount, s->contents);
+ put_word (output_bfd, dynsymcount, s->contents + (ARCH_SIZE / 8));
+
+ elf_hash_table (info)->bucketcount = bucketcount;
+
+ s = bfd_get_section_by_name (dynobj, ".dynstr");
+ BFD_ASSERT (s != NULL);
+ s->_raw_size = elf_hash_table (info)->dynstr->length;
+ s->contents = (unsigned char *) elf_hash_table (info)->dynstr->tab;
+
+ /* Find all symbols which were defined in a dynamic object and make
+ the backend pick a reasonable value for them. */
+ elf_link_hash_traverse (elf_hash_table (info),
+ elf_adjust_dynamic_symbol,
+ (PTR) info);
+
+ /* Add some entries to the .dynamic section. We fill in some of the
+ values later, in elf_bfd_final_link, but we must add the entries
+ now so that we know the final size of the .dynamic section. */
+ if (bfd_get_section_by_name (output_bfd, ".init") != NULL)
+ {
+ if (! elf_add_dynamic_entry (info, DT_INIT, 0))
+ return false;
+ }
+ if (bfd_get_section_by_name (output_bfd, ".fini") != NULL)
+ {
+ if (! elf_add_dynamic_entry (info, DT_FINI, 0))
+ return false;
+ }
+ if (! elf_add_dynamic_entry (info, DT_HASH, 0)
+ || ! elf_add_dynamic_entry (info, DT_STRTAB, 0)
+ || ! elf_add_dynamic_entry (info, DT_SYMTAB, 0)
+ || ! elf_add_dynamic_entry (info, DT_STRSZ,
+ elf_hash_table (info)->dynstr->length)
+ || ! elf_add_dynamic_entry (info, DT_SYMENT,
+ sizeof (Elf_External_Sym)))
+ return false;
+
+ /* The backend must work out the sizes of all the other dynamic
+ sections. */
+ bed = get_elf_backend_data (output_bfd);
+ if (! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info))
+ return false;
+
+ return elf_add_dynamic_entry (info, DT_NULL, 0);
+}
+
+/* Make the backend pick a good value for a dynamic symbol. This is
+ called via elf_link_hash_traverse, and also calls itself
+ recursively. */
+
+static boolean
+elf_adjust_dynamic_symbol (h, data)
+ struct elf_link_hash_entry *h;
+ PTR data;
+{
+ struct bfd_link_info *info = (struct bfd_link_info *) data;
+ bfd *dynobj;
+ struct elf_backend_data *bed;
+
+ /* If this symbol is not defined by a dynamic object, or is not
+ referenced by a regular object, ignore it. FIXME: Do we need to
+ worry about symbols which are defined by one dynamic object and
+ referenced by another one? */
+ if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
+ || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
+ || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
+ return true;
+
+ /* If we've already adjusted this symbol, don't do it again. This
+ can happen via a recursive call. */
+ if ((h->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
+ return true;
+
+ /* Don't look at this symbol again. Note that we must set this
+ after checking the above conditions, because we may look at a
+ symbol once, decide not to do anything, and then get called
+ recursively later after REF_REGULAR is set below. */
+ h->elf_link_hash_flags |= ELF_LINK_HASH_DYNAMIC_ADJUSTED;
+
+ /* If this is a weak definition, and we know a real definition, and
+ the real symbol is not itself defined by a regular object file,
+ then get a good value for the real definition. We handle the
+ real symbol first, for the convenience of the backend routine.
+
+ Note that there is a confusing case here. If the real definition
+ is defined by a regular object file, we don't get the real symbol
+ from the dynamic object, but we do get the weak symbol. If the
+ processor backend uses a COPY reloc, then if some routine in the
+ dynamic object changes the real symbol, we will not see that
+ change in the corresponding weak symbol. This is the way other
+ ELF linkers work as well, and seems to be a result of the shared
+ library model.
+
+ I will clarify this issue. Most SVR4 shared libraries define the
+ variable _timezone and define timezone as a weak synonym. The
+ tzset call changes _timezone. If you write
+ extern int timezone;
+ int _timezone = 5;
+ int main () { tzset (); printf ("%d %d\n", timezone, _timezone); }
+ you might expect that, since timezone is a synonym for _timezone,
+ the same number will print both times. However, if the processor
+ backend uses a COPY reloc, then actually timezone will be copied
+ into your process image, and, since you define _timezone
+ yourself, _timezone will not. Thus timezone and _timezone will
+ wind up at different memory locations. The tzset call will set
+ _timezone, leaving timezone unchanged. */
+
+ if (h->weakdef != NULL)
+ {
+ struct elf_link_hash_entry *weakdef;
+
+ BFD_ASSERT (h->root.type == bfd_link_hash_defined);
+ weakdef = h->weakdef;
+ BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined);
+ BFD_ASSERT (weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC);
+ if ((weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
+ || (weakdef->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
+ {
+ /* This symbol is defined or referenced by a regular object
+ file, so we will not do anything special. Clear weakdef
+ for the convenience of the processor backend. */
+ h->weakdef = NULL;
+ }
+ else
+ {
+ /* There is an implicit reference by a regular object file
+ via the weak symbol. */
+ weakdef->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR;
+ if (! elf_adjust_dynamic_symbol (weakdef, (PTR) info))
+ return false;
+ }
+ }
+
+ dynobj = elf_hash_table (info)->dynobj;
+ bed = get_elf_backend_data (dynobj);
+ if (! (*bed->elf_backend_adjust_dynamic_symbol) (info, h))
+ {
+ /* FIXME: No way to return error. */
+ abort ();
+ }
+
+ return true;
+}
+\f
+/* Final phase of ELF linker. */
+
+/* A structure we use to avoid passing large numbers of arguments. */
+
+struct elf_final_link_info
+{
+ /* General link information. */
+ struct bfd_link_info *info;
+ /* Output BFD. */
+ bfd *output_bfd;
+ /* Symbol string table. */
+ struct strtab *symstrtab;
+ /* .dynsym section. */
+ asection *dynsym_sec;
+ /* .hash section. */
+ asection *hash_sec;
+ /* Buffer large enough to hold contents of any section. */
+ bfd_byte *contents;
+ /* Buffer large enough to hold external relocs of any section. */
+ PTR external_relocs;
+ /* Buffer large enough to hold internal relocs of any section. */
+ Elf_Internal_Rela *internal_relocs;
+ /* Buffer large enough to hold external local symbols of any input
+ BFD. */
+ Elf_External_Sym *external_syms;
+ /* Buffer large enough to hold internal local symbols of any input
+ BFD. */
+ Elf_Internal_Sym *internal_syms;
+ /* Array large enough to hold a symbol index for each local symbol
+ of any input BFD. */
+ long *indices;
+ /* Array large enough to hold a section pointer for each local
+ symbol of any input BFD. */
+ asection **sections;
+ /* Buffer to hold swapped out symbols. */
+ Elf_External_Sym *symbuf;
+ /* Number of swapped out symbols in buffer. */
+ size_t symbuf_count;
+ /* Number of symbols which fit in symbuf. */
+ size_t symbuf_size;
+};
+
+static boolean elf_link_output_sym
+ PARAMS ((struct elf_final_link_info *, const char *, Elf_Internal_Sym *));
+static boolean elf_link_flush_output_syms
+ PARAMS ((struct elf_final_link_info *));
+static boolean elf_link_output_extsym
+ PARAMS ((struct elf_link_hash_entry *, PTR));
+static boolean elf_link_input_bfd
+ PARAMS ((struct elf_final_link_info *, bfd *));
+static boolean elf_reloc_link_order
+ PARAMS ((bfd *, struct bfd_link_info *, asection *,
+ struct bfd_link_order *));
+
+/* Do the final step of an ELF link. */
+
+boolean
+elf_bfd_final_link (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
+{
+ bfd *dynobj;
+ struct elf_final_link_info finfo;
+ register asection *o;
+ register struct bfd_link_order *p;
+ register bfd *sub;
+ size_t max_contents_size;
+ size_t max_external_reloc_size;
+ size_t max_internal_reloc_count;
+ size_t max_sym_count;
+ file_ptr off;
+ Elf_Internal_Sym elfsym;
+ unsigned int i;
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Shdr *symstrtab_hdr;
+
+ dynobj = elf_hash_table (info)->dynobj;
+
+ finfo.info = info;
+ finfo.output_bfd = abfd;
+ finfo.symstrtab = bfd_new_strtab (abfd);
+ if (finfo.symstrtab == NULL)
+ return false;
+ if (dynobj == NULL)
+ {
+ finfo.dynsym_sec = NULL;
+ finfo.hash_sec = NULL;
+ }
+ else
+ {
+ finfo.dynsym_sec = bfd_get_section_by_name (dynobj, ".dynsym");
+ finfo.hash_sec = bfd_get_section_by_name (dynobj, ".hash");
+ if (finfo.dynsym_sec == NULL
+ || finfo.hash_sec == NULL)
+ abort ();
+ }
+ finfo.contents = NULL;
+ finfo.external_relocs = NULL;
+ finfo.internal_relocs = NULL;
+ finfo.external_syms = NULL;
+ finfo.internal_syms = NULL;
+ finfo.indices = NULL;
+ finfo.sections = NULL;
+ finfo.symbuf = NULL;
+ finfo.symbuf_count = 0;
+
+ /* Count up the number of relocations we will output for each output
+ section, so that we know the sizes of the reloc sections. We
+ also figure out some maximum sizes. */
+ max_contents_size = 0;
+ max_external_reloc_size = 0;
+ max_internal_reloc_count = 0;
+ max_sym_count = 0;
+ for (o = abfd->sections; o != (asection *) NULL; o = o->next)
+ {
+ o->reloc_count = 0;
+
+ for (p = o->link_order_head; p != NULL; p = p->next)
+ {
+ if (p->type == bfd_section_reloc_link_order
+ || p->type == bfd_symbol_reloc_link_order)
+ ++o->reloc_count;
+ else if (p->type == bfd_indirect_link_order)
+ {
+ asection *sec;
+
+ sec = p->u.indirect.section;
+
+ if (info->relocateable)
+ o->reloc_count += sec->reloc_count;
+
+ if (sec->_raw_size > max_contents_size)
+ max_contents_size = sec->_raw_size;
+ if (sec->_cooked_size > max_contents_size)
+ max_contents_size = sec->_cooked_size;
+
+ /* We are interested in just local symbols, not all
+ symbols. */
+ if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour
+ && (elf_tdata (sec->owner)->symtab_hdr.sh_info
+ > max_sym_count))
+ max_sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info;
+
+ if ((sec->flags & SEC_RELOC) != 0)
+ {
+ size_t ext_size;
+
+ ext_size = elf_section_data (sec)->rel_hdr.sh_size;
+ if (ext_size > max_external_reloc_size)
+ max_external_reloc_size = ext_size;
+ if (sec->reloc_count > max_internal_reloc_count)
+ max_internal_reloc_count = sec->reloc_count;
+ }
+ }
+ }
+
+ if (o->reloc_count > 0)
+ o->flags |= SEC_RELOC;
+ else
+ {
+ /* Explicitly clear the SEC_RELOC flag. The linker tends to
+ set it (this is probably a bug) and if it is set
+ assign_section_numbers will create a reloc section. */
+ o->flags &=~ SEC_RELOC;
+ }
+ }
+
+ /* Figure out the file positions for everything but the symbol table
+ and the relocs. We set symcount to force assign_section_numbers
+ to create a symbol table. */
+ abfd->symcount = info->strip == strip_all ? 0 : 1;
+ BFD_ASSERT (! abfd->output_has_begun);
+ if (! elf_compute_section_file_positions (abfd, info))
+ goto error_return;
+
+ /* That created the reloc sections. Set their sizes, and assign
+ them file positions, and allocate some buffers. */
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ if ((o->flags & SEC_RELOC) != 0)
+ {
+ Elf_Internal_Shdr *rel_hdr;
+ register struct elf_link_hash_entry **p, **pend;
+
+ rel_hdr = &elf_section_data (o)->rel_hdr;
+
+ rel_hdr->sh_size = rel_hdr->sh_entsize * o->reloc_count;
+
+ /* The contents field must last into write_object_contents,
+ so we allocate it with bfd_alloc rather than malloc. */
+ rel_hdr->contents = (PTR) bfd_alloc (abfd, rel_hdr->sh_size);
+ if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
+ }
+
+ p = ((struct elf_link_hash_entry **)
+ malloc (o->reloc_count
+ * sizeof (struct elf_link_hash_entry *)));
+ if (p == NULL && o->reloc_count != 0)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
+ }
+ elf_section_data (o)->rel_hashes = p;
+ pend = p + o->reloc_count;
+ for (; p < pend; p++)
+ *p = NULL;
+
+ /* Use the reloc_count field as an index when outputting the
+ relocs. */
+ o->reloc_count = 0;
+ }
+ }
+
+ assign_file_positions_for_relocs (abfd);
+
+ /* We have now assigned file positions for all the sections except
+ .symtab and .strtab. We start the .symtab section at the current
+ file position, and write directly to it. We build the .strtab
+ section in memory. When we add .dynsym support, we will build
+ that in memory as well (.dynsym is smaller than .symtab). */
+ abfd->symcount = 0;
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ /* sh_name is set in prep_headers. */
+ symtab_hdr->sh_type = SHT_SYMTAB;
+ symtab_hdr->sh_flags = 0;
+ symtab_hdr->sh_addr = 0;
+ symtab_hdr->sh_size = 0;
+ symtab_hdr->sh_entsize = sizeof (Elf_External_Sym);
+ /* sh_link is set in assign_section_numbers. */
+ /* sh_info is set below. */
+ /* sh_offset is set just below. */
+ symtab_hdr->sh_addralign = 4; /* FIXME: system dependent? */
+
+ off = elf_tdata (abfd)->next_file_pos;
+ off = assign_file_position_for_section (symtab_hdr, off, true);
+
+ /* Note that at this point elf_tdata (abfd)->next_file_pos is
+ incorrect. We do not yet know the size of the .symtab section.
+ We correct next_file_pos below, after we do know the size. */
+
+ /* Allocate a buffer to hold swapped out symbols. This is to avoid
+ continuously seeking to the right position in the file. */
+ if (! info->keep_memory || max_sym_count < 20)
+ finfo.symbuf_size = 20;
+ else
+ finfo.symbuf_size = max_sym_count;
+ finfo.symbuf = ((Elf_External_Sym *)
+ malloc (finfo.symbuf_size * sizeof (Elf_External_Sym)));
+ if (finfo.symbuf == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
+ }
+
+ /* Start writing out the symbol table. The first symbol is always a
+ dummy symbol. */
+ elfsym.st_value = 0;
+ elfsym.st_size = 0;
+ elfsym.st_info = 0;
+ elfsym.st_other = 0;
+ elfsym.st_shndx = SHN_UNDEF;
+ if (! elf_link_output_sym (&finfo, (const char *) NULL, &elfsym))
+ goto error_return;
+
+#if 0
+ /* Some standard ELF linkers do this, but we don't because it causes
+ bootstrap comparison failures. */
+ /* Output a file symbol for the output file as the second symbol.
+ We output this even if we are discarding local symbols, although
+ I'm not sure if this is correct. */
+ elfsym.st_value = 0;
+ elfsym.st_size = 0;
+ elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
+ elfsym.st_other = 0;
+ elfsym.st_shndx = SHN_ABS;
+ if (! elf_link_output_sym (&finfo, bfd_get_filename (abfd), &elfsym))
+ goto error_return;
+#endif
+
+ /* Output a symbol for each section. We output these even if we are
+ discarding local symbols, since they are used for relocs. These
+ symbols have no names. We store the index of each one in the
+ index field of the section, so that we can find it again when
+ outputting relocs. */
+ elfsym.st_value = 0;
+ elfsym.st_size = 0;
+ elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
+ elfsym.st_other = 0;
+ for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++)
+ {
+ o = section_from_elf_index (abfd, i);
+ if (o != &bfd_abs_section)
+ o->target_index = abfd->symcount;
+ elfsym.st_shndx = i;
+ if (! elf_link_output_sym (&finfo, (const char *) NULL, &elfsym))
+ goto error_return;
+ }
+
+ /* Allocate some memory to hold information read in from the input
+ files. */
+ finfo.contents = (bfd_byte *) malloc (max_contents_size);
+ finfo.external_relocs = (PTR) malloc (max_external_reloc_size);
+ finfo.internal_relocs = ((Elf_Internal_Rela *)
+ malloc (max_internal_reloc_count
+ * sizeof (Elf_Internal_Rela)));
+ finfo.external_syms = ((Elf_External_Sym *)
+ malloc (max_sym_count * sizeof (Elf_External_Sym)));
+ finfo.internal_syms = ((Elf_Internal_Sym *)
+ malloc (max_sym_count * sizeof (Elf_Internal_Sym)));
+ finfo.indices = (long *) malloc (max_sym_count * sizeof (long));
+ finfo.sections = (asection **) malloc (max_sym_count * sizeof (asection *));
+ if ((finfo.contents == NULL && max_contents_size != 0)
+ || (finfo.external_relocs == NULL && max_external_reloc_size != 0)
+ || (finfo.internal_relocs == NULL && max_internal_reloc_count != 0)
+ || (finfo.external_syms == NULL && max_sym_count != 0)
+ || (finfo.internal_syms == NULL && max_sym_count != 0)
+ || (finfo.indices == NULL && max_sym_count != 0)
+ || (finfo.sections == NULL && max_sym_count != 0))
+ {
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
+ }
+
+ /* Since ELF permits relocations to be against local symbols, we
+ must have the local symbols available when we do the relocations.
+ Since we would rather only read the local symbols once, and we
+ would rather not keep them in memory, we handle all the
+ relocations for a single input file at the same time.
+
+ Unfortunately, there is no way to know the total number of local
+ symbols until we have seen all of them, and the local symbol
+ indices precede the global symbol indices. This means that when
+ we are generating relocateable output, and we see a reloc against
+ a global symbol, we can not know the symbol index until we have
+ finished examining all the local symbols to see which ones we are
+ going to output. To deal with this, we keep the relocations in
+ memory, and don't output them until the end of the link. This is
+ an unfortunate waste of memory, but I don't see a good way around
+ it. Fortunately, it only happens when performing a relocateable
+ link, which is not the common case. FIXME: If keep_memory is set
+ we could write the relocs out and then read them again; I don't
+ know how bad the memory loss will be. */
+
+ for (sub = info->input_bfds; sub != NULL; sub = sub->next)
+ sub->output_has_begun = false;
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ for (p = o->link_order_head; p != NULL; p = p->next)
+ {
+ if (p->type == bfd_indirect_link_order
+ && (bfd_get_flavour (p->u.indirect.section->owner)
+ == bfd_target_elf_flavour))
+ {
+ sub = p->u.indirect.section->owner;
+ if (! sub->output_has_begun)
+ {
+ if (! elf_link_input_bfd (&finfo, sub))
+ goto error_return;
+ sub->output_has_begun = true;
+ }
+ }
+ else if (p->type == bfd_section_reloc_link_order
+ || p->type == bfd_symbol_reloc_link_order)
+ {
+ if (! elf_reloc_link_order (abfd, info, o, p))
+ goto error_return;
+ }
+ else
+ {
+ if (! _bfd_default_link_order (abfd, info, o, p))
+ goto error_return;
+ }
+ }
+ }
+
+ /* That wrote out all the local symbols. Finish up the symbol table
+ with the global symbols. */
+
+ /* The sh_info field records the index of the first non local
+ symbol. */
+ symtab_hdr->sh_info = abfd->symcount;
+ if (dynobj != NULL)
+ elf_section_data (finfo.dynsym_sec->output_section)->this_hdr.sh_info = 1;
+
+ /* We get the global symbols from the hash table. */
+ elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym,
+ (PTR) &finfo);
+
+ /* Flush all symbols to the file. */
+ if (! elf_link_flush_output_syms (&finfo))
+ return false;
+
+ /* Now we know the size of the symtab section. */
+ off += symtab_hdr->sh_size;
+
+ /* Finish up the symbol string table (.strtab) section. */
+ symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
+ /* sh_name was set in prep_headers. */
+ symstrtab_hdr->sh_type = SHT_STRTAB;
+ symstrtab_hdr->sh_flags = 0;
+ symstrtab_hdr->sh_addr = 0;
+ symstrtab_hdr->sh_size = finfo.symstrtab->length;
+ symstrtab_hdr->sh_entsize = 0;
+ symstrtab_hdr->sh_link = 0;
+ symstrtab_hdr->sh_info = 0;
+ /* sh_offset is set just below. */
+ symstrtab_hdr->sh_addralign = 1;
+ symstrtab_hdr->contents = (PTR) finfo.symstrtab->tab;
+
+ off = assign_file_position_for_section (symstrtab_hdr, off, true);
+ elf_tdata (abfd)->next_file_pos = off;
+
+ /* Adjust the relocs to have the correct symbol indices. */
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ struct elf_link_hash_entry **rel_hash;
+ Elf_Internal_Shdr *rel_hdr;
+
+ if ((o->flags & SEC_RELOC) == 0)
+ continue;
+
+ rel_hash = elf_section_data (o)->rel_hashes;
+ rel_hdr = &elf_section_data (o)->rel_hdr;
+ for (i = 0; i < o->reloc_count; i++, rel_hash++)
+ {
+ if (*rel_hash == NULL)
+ continue;
+
+ BFD_ASSERT ((*rel_hash)->indx >= 0);
+
+ if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel))
+ {
+ Elf_External_Rel *erel;
+ Elf_Internal_Rel irel;
+
+ erel = (Elf_External_Rel *) rel_hdr->contents + i;
+ elf_swap_reloc_in (abfd, erel, &irel);
+ irel.r_info = ELF_R_INFO ((*rel_hash)->indx,
+ ELF_R_TYPE (irel.r_info));
+ elf_swap_reloc_out (abfd, &irel, erel);
+ }
+ else
+ {
+ Elf_External_Rela *erela;
+ Elf_Internal_Rela irela;
+
+ BFD_ASSERT (rel_hdr->sh_entsize
+ == sizeof (Elf_External_Rela));
+
+ erela = (Elf_External_Rela *) rel_hdr->contents + i;
+ elf_swap_reloca_in (abfd, erela, &irela);
+ irela.r_info = ELF_R_INFO ((*rel_hash)->indx,
+ ELF_R_TYPE (irela.r_info));
+ elf_swap_reloca_out (abfd, &irela, erela);
+ }
+ }
+
+ /* Set the reloc_count field to 0 to prevent write_relocs from
+ trying to swap the relocs out itself. */
+ o->reloc_count = 0;
+ }
+
+ /* If we are linking against a dynamic object, finish up the dynamic
+ linking information. */
+ if (dynobj != NULL)
+ {
+ Elf_External_Dyn *dyncon, *dynconend;
+ struct elf_backend_data *bed;
+
+ /* Fix up .dynamic entries. */
+ o = bfd_get_section_by_name (dynobj, ".dynamic");
+ BFD_ASSERT (o != NULL);
+
+ dyncon = (Elf_External_Dyn *) o->contents;
+ dynconend = (Elf_External_Dyn *) (o->contents + o->_raw_size);
+ for (; dyncon < dynconend; dyncon++)
+ {
+ Elf_Internal_Dyn dyn;
+ const char *name;
+ unsigned int type;
+
+ elf_swap_dyn_in (dynobj, dyncon, &dyn);
+
+ switch (dyn.d_tag)
+ {
+ default:
+ break;
+
+ case DT_INIT:
+ name = ".init";
+ goto get_vma;
+ case DT_FINI:
+ name = ".fini";
+ goto get_vma;
+ case DT_HASH:
+ name = ".hash";
+ goto get_vma;
+ case DT_STRTAB:
+ name = ".dynstr";
+ goto get_vma;
+ case DT_SYMTAB:
+ name = ".dynsym";
+ get_vma:
+ o = bfd_get_section_by_name (abfd, name);
+ BFD_ASSERT (o != NULL);
+ dyn.d_un.d_ptr = o->vma;
+ elf_swap_dyn_out (dynobj, &dyn, dyncon);
+ break;
+
+ case DT_REL:
+ case DT_RELA:
+ case DT_RELSZ:
+ case DT_RELASZ:
+ if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
+ type = SHT_REL;
+ else
+ type = SHT_RELA;
+ dyn.d_un.d_val = 0;
+ for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++)
+ {
+ Elf_Internal_Shdr *hdr;
+
+ hdr = elf_elfsections (abfd)[i];
+ if (hdr->sh_type == type
+ && (hdr->sh_flags & SHF_ALLOC) != 0)
+ {
+ if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ)
+ dyn.d_un.d_val += hdr->sh_size;
+ else
+ {
+ if (dyn.d_un.d_val == 0
+ || hdr->sh_addr < dyn.d_un.d_val)
+ dyn.d_un.d_val = hdr->sh_addr;
+ }
+ }
+ }
+ elf_swap_dyn_out (dynobj, &dyn, dyncon);
+ break;
+ }
+ }
+
+ bed = get_elf_backend_data (abfd);
+ if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info))
+ goto error_return;
+
+ for (o = dynobj->sections; o != NULL; o = o->next)
+ {
+ Elf_Internal_Shdr *hdr;
+ asection *s;
+ const char *name;
+
+ if ((o->flags & SEC_HAS_CONTENTS) == 0)
+ continue;
+ BFD_ASSERT ((o->flags & SEC_IN_MEMORY) != 0);
+ if (! bfd_set_section_contents (abfd, o->output_section,
+ o->contents, o->output_offset,
+ o->_raw_size))
+ goto error_return;
+
+ hdr = &elf_section_data (o->output_section)->this_hdr;
+ switch (hdr->sh_type)
+ {
+ case SHT_DYNAMIC:
+ s = bfd_get_section_by_name (abfd, ".dynstr");
+ hdr->sh_link = elf_section_data (s)->this_idx;
+ hdr->sh_entsize = sizeof (Elf_External_Dyn);
+ break;
+
+ case SHT_HASH:
+ s = finfo.dynsym_sec->output_section;
+ hdr->sh_link = elf_section_data (s)->this_idx;
+ hdr->sh_entsize = ARCH_SIZE / 8;
+ break;
+
+ case SHT_DYNSYM:
+ s = bfd_get_section_by_name (abfd, ".dynstr");
+ hdr->sh_link = elf_section_data (s)->this_idx;
+ hdr->sh_entsize = sizeof (Elf_External_Sym);
+ break;
+
+ case SHT_REL:
+ case SHT_RELA:
+ name = bfd_get_section_name (abfd, o->output_section);
+ s = finfo.dynsym_sec->output_section;
+ hdr->sh_link = elf_section_data (s)->this_idx;
+ if (hdr->sh_type == SHT_REL)
+ {
+ name += 4;
+ hdr->sh_entsize = sizeof (Elf_External_Rel);
+ }
+ else
+ {
+ name += 5;
+ hdr->sh_entsize = sizeof (Elf_External_Rela);
+ }
+ s = bfd_get_section_by_name (abfd, name);
+ if (s != NULL)
+ hdr->sh_info = elf_section_data (s)->this_idx;
+ break;
+ }
+ }
+ }
+
+ if (finfo.contents != NULL)
+ free (finfo.contents);
+ if (finfo.external_relocs != NULL)
+ free (finfo.external_relocs);
+ if (finfo.internal_relocs != NULL)
+ free (finfo.internal_relocs);
+ if (finfo.external_syms != NULL)
+ free (finfo.external_syms);
+ if (finfo.internal_syms != NULL)
+ free (finfo.internal_syms);
+ if (finfo.indices != NULL)
+ free (finfo.indices);
+ if (finfo.sections != NULL)
+ free (finfo.sections);
+ if (finfo.symbuf != NULL)
+ free (finfo.symbuf);
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ if ((o->flags & SEC_RELOC) != 0
+ && elf_section_data (o)->rel_hashes != NULL)
+ free (elf_section_data (o)->rel_hashes);
+ }
+
+ return true;
+
+ error_return:
+ if (finfo.contents != NULL)
+ free (finfo.contents);
+ if (finfo.external_relocs != NULL)
+ free (finfo.external_relocs);
+ if (finfo.internal_relocs != NULL)
+ free (finfo.internal_relocs);
+ if (finfo.external_syms != NULL)
+ free (finfo.external_syms);
+ if (finfo.internal_syms != NULL)
+ free (finfo.internal_syms);
+ if (finfo.indices != NULL)
+ free (finfo.indices);
+ if (finfo.sections != NULL)
+ free (finfo.sections);
+ if (finfo.symbuf != NULL)
+ free (finfo.symbuf);
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ if ((o->flags & SEC_RELOC) != 0
+ && elf_section_data (o)->rel_hashes != NULL)
+ free (elf_section_data (o)->rel_hashes);
+ }
+
+ return false;
+}
+
+/* Add a symbol to the output symbol table. */
+
+static boolean
+elf_link_output_sym (finfo, name, elfsym)
+ struct elf_final_link_info *finfo;
+ const char *name;
+ Elf_Internal_Sym *elfsym;
+{
+ if (name == (const char *) NULL || *name == '\0')
+ elfsym->st_name = 0;
+ else
+ {
+ elfsym->st_name = bfd_add_to_strtab (finfo->output_bfd,
+ finfo->symstrtab, name);
+ if (elfsym->st_name == (unsigned long) -1)
+ return false;
+ }
+
+ if (finfo->symbuf_count >= finfo->symbuf_size)
+ {
+ if (! elf_link_flush_output_syms (finfo))
+ return false;
+ }
+
+ elf_swap_symbol_out (finfo->output_bfd, elfsym,
+ finfo->symbuf + finfo->symbuf_count);
+ ++finfo->symbuf_count;
+
+ ++finfo->output_bfd->symcount;
+
+ return true;
+}
+
+/* Flush the output symbols to the file. */
+
+static boolean
+elf_link_flush_output_syms (finfo)
+ struct elf_final_link_info *finfo;
+{
+ Elf_Internal_Shdr *symtab;
+
+ symtab = &elf_tdata (finfo->output_bfd)->symtab_hdr;
+
+ if (bfd_seek (finfo->output_bfd, symtab->sh_offset + symtab->sh_size,
+ SEEK_SET) != 0
+ || (bfd_write ((PTR) finfo->symbuf, finfo->symbuf_count,
+ sizeof (Elf_External_Sym), finfo->output_bfd)
+ != finfo->symbuf_count * sizeof (Elf_External_Sym)))
+ return false;
+
+ symtab->sh_size += finfo->symbuf_count * sizeof (Elf_External_Sym);
+
+ finfo->symbuf_count = 0;
+
+ return true;
+}
+
+/* Add an external symbol to the symbol table. This is called from
+ the hash table traversal routine. */
+
+static boolean
+elf_link_output_extsym (h, data)
+ struct elf_link_hash_entry *h;
+ PTR data;
+{
+ struct elf_final_link_info *finfo = (struct elf_final_link_info *) data;
+ boolean strip;
+ Elf_Internal_Sym sym;
+
+ /* We don't want to output symbols that have never been mentioned by
+ a regular file, or that we have been told to strip. However, if
+ h->indx is set to -2, the symbol is used by a reloc and we must
+ output it. */
+ if (h->indx == -2)
+ strip = false;
+ else if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
+ strip = true;
+ else if (finfo->info->strip == strip_all
+ || (finfo->info->strip == strip_some
+ && bfd_hash_lookup (finfo->info->keep_hash,
+ h->root.root.string,
+ false, false) == NULL))
+ strip = true;
+ else
+ strip = false;
+
+ /* If we're stripping it, and it's not a dynamic symbol, there's
+ nothing else to do. */
+ if (strip && h->dynindx == -1)
+ return true;
+
+ sym.st_value = 0;
+ sym.st_size = h->size;
+ sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type);
+ sym.st_other = 0;
+
+ switch (h->root.type)
+ {
+ default:
+ case bfd_link_hash_new:
+ abort ();
+ return false;
+
+ case bfd_link_hash_undefined:
+ sym.st_shndx = SHN_UNDEF;
+ break;
+
+ case bfd_link_hash_weak:
+ sym.st_shndx = SHN_UNDEF;
+ sym.st_info = ELF_ST_INFO (STB_WEAK, h->type);
+ break;
+
+ case bfd_link_hash_defined:
+ {
+ asection *sec;
+
+ sec = h->root.u.def.section;
+ if (sec->output_section != NULL)
+ {
+ sym.st_shndx = elf_section_from_bfd_section (finfo->output_bfd,
+ sec->output_section);
+ if (sym.st_shndx == (unsigned short) -1)
+ {
+ /* FIXME: No way to handle errors. */
+ abort ();
+ }
+
+ /* ELF symbols in relocateable files are section relative,
+ but in nonrelocateable files they are virtual
+ addresses. */
+ sym.st_value = h->root.u.def.value + sec->output_offset;
+ if (! finfo->info->relocateable)
+ sym.st_value += sec->output_section->vma;
+ }
+ else
+ {
+ BFD_ASSERT (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour
+ && elf_elfheader (sec->owner)->e_type == ET_DYN);
+ sym.st_shndx = SHN_UNDEF;
+ }
+ }
+ break;
+
+ case bfd_link_hash_common:
+ sym.st_shndx = SHN_COMMON;
+ if (h->align == 0)
+ sym.st_value = 1;
+ else
+ sym.st_value = h->align;
+ break;
+
+ case bfd_link_hash_indirect:
+ case bfd_link_hash_warning:
+ /* I have no idea how these should be handled. */
+ return true;
+ }
+
+ /* If this symbol should be put in the .dynsym section, then put it
+ there now. We have already know the symbol index. We also fill
+ in the entry in the .hash section. */
+ if (h->dynindx != -1)
+ {
+ struct elf_backend_data *bed;
+ size_t bucketcount;
+ size_t bucket;
+ bfd_byte *bucketpos;
+ bfd_vma chain;
+
+ sym.st_name = h->dynstr_index;
+
+ /* Give the processor backend a chance to tweak the symbol
+ value, and also to finish up anything that needs to be done
+ for this symbol. */
+ bed = get_elf_backend_data (finfo->output_bfd);
+ if (! ((*bed->elf_backend_finish_dynamic_symbol)
+ (finfo->output_bfd, finfo->info, h, &sym)))
+ {
+ /* FIXME: No way to return error. */
+ abort ();
+ }
+
+ elf_swap_symbol_out (finfo->output_bfd, &sym,
+ ((Elf_External_Sym *) finfo->dynsym_sec->contents
+ + h->dynindx));
+
+ bucketcount = elf_hash_table (finfo->info)->bucketcount;
+ bucket = bfd_elf_hash (h->root.root.string) % bucketcount;
+ bucketpos = ((bfd_byte *) finfo->hash_sec->contents
+ + (bucket + 2) * (ARCH_SIZE / 8));
+ chain = get_word (finfo->output_bfd, bucketpos);
+ put_word (finfo->output_bfd, h->dynindx, bucketpos);
+ put_word (finfo->output_bfd, chain,
+ ((bfd_byte *) finfo->hash_sec->contents
+ + (bucketcount + 2 + h->dynindx) * (ARCH_SIZE / 8)));
+ }
+
+ /* If we're stripping it, then it was just a dynamic symbol, and
+ there's nothing else to do. */
+ if (strip)
+ return true;
+
+ h->indx = finfo->output_bfd->symcount;
+
+ if (! elf_link_output_sym (finfo, h->root.root.string, &sym))
+ {
+ /* FIXME: No way to return error. */
+ abort ();
+ }
+
+ return true;
+}
+
+/* Link an input file into the linker output file. This function
+ handles all the sections and relocations of the input file at once.
+ This is so that we only have to read the local symbols once, and
+ don't have to keep them in memory. */
+
+static boolean
+elf_link_input_bfd (finfo, input_bfd)
+ struct elf_final_link_info *finfo;
+ bfd *input_bfd;
+{
+ boolean (*relocate_section) PARAMS ((bfd *, struct bfd_link_info *,
+ bfd *, asection *, bfd_byte *,
+ Elf_Internal_Rela *,
+ Elf_Internal_Sym *,
+ asection **));
+ bfd *output_bfd;
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_External_Sym *esym;
+ Elf_External_Sym *esymend;
+ Elf_Internal_Sym *isym;
+ long *pindex;
+ asection **ppsection;
+ asection *o;
+
+ output_bfd = finfo->output_bfd;
+ relocate_section =
+ get_elf_backend_data (output_bfd)->elf_backend_relocate_section;
+
+ /* If this is a dynamic object, we don't want to do anything here:
+ we don't want the local symbols, and we don't want the section
+ contents. */
+ if (elf_elfheader (input_bfd)->e_type == ET_DYN)
+ return true;
+
+ /* Read the local symbols. */
+ symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+ if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0
+ || (bfd_read (finfo->external_syms, sizeof (Elf_External_Sym),
+ symtab_hdr->sh_info, input_bfd)
+ != symtab_hdr->sh_info * sizeof (Elf_External_Sym)))
+ return false;
+
+ /* Swap in the local symbols and write out the ones which we know
+ are going into the output file. */
+ esym = finfo->external_syms;
+ esymend = esym + symtab_hdr->sh_info;
+ isym = finfo->internal_syms;
+ pindex = finfo->indices;
+ ppsection = finfo->sections;
+ for (; esym < esymend; esym++, isym++, pindex++, ppsection++)
+ {
+ asection *isec;
+ const char *name;
+ bfd_vma oldval;
+
+ elf_swap_symbol_in (input_bfd, esym, isym);
+ *pindex = -1;
+
+ if (isym->st_shndx == SHN_UNDEF)
+ isec = &bfd_und_section;
+ else if (isym->st_shndx > 0 && isym->st_shndx < SHN_LORESERVE)
+ {
+ isec = section_from_elf_index (input_bfd, isym->st_shndx);
+ if (isec == NULL)
+ return false;
+ }
+ else if (isym->st_shndx == SHN_ABS)
+ isec = &bfd_abs_section;
+ else if (isym->st_shndx == SHN_COMMON)
+ isec = &bfd_com_section;
+ else
+ {
+ /* Who knows? */
+ isec = NULL;
+ }
+
+ *ppsection = isec;
+
+ /* Don't output the first, undefined, symbol. */
+ if (esym == finfo->external_syms)
+ continue;
+
+ /* If we are stripping all symbols, we don't want to output this
+ one. */
+ if (finfo->info->strip == strip_all)
+ continue;
+
+ /* We never output section symbols. Instead, we use the section
+ symbol of the corresponding section in the output file. */
+ if (ELF_ST_TYPE (isym->st_info) == STT_SECTION)
+ continue;
+
+ /* If we are discarding all local symbols, we don't want to
+ output this one. If we are generating a relocateable output
+ file, then some of the local symbols may be required by
+ relocs; we output them below as we discover that they are
+ needed. */
+ if (finfo->info->discard == discard_all)
+ continue;
+
+ /* Get the name of the symbol. */
+ name = elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link,
+ isym->st_name);
+ if (name == NULL)
+ return false;
+
+ /* See if we are discarding symbols with this name. */
+ if ((finfo->info->strip == strip_some
+ && (bfd_hash_lookup (finfo->info->keep_hash, name, false, false)
+ == NULL))
+ || (finfo->info->discard == discard_l
+ && strncmp (name, finfo->info->lprefix,
+ finfo->info->lprefix_len) == 0))
+ continue;
+
+ /* If we get here, we are going to output this symbol. */
+
+ /* Adjust the section index for the output file. */
+ isym->st_shndx = elf_section_from_bfd_section (output_bfd,
+ isec->output_section);
+ if (isym->st_shndx == (unsigned short) -1)
+ return false;
+
+ *pindex = output_bfd->symcount;
+
+ /* ELF symbols in relocateable files are section relative, but
+ in executable files they are virtual addresses. Note that
+ this code assumes that all ELF sections have an associated
+ BFD section with a reasonable value for output_offset; below
+ we assume that they also have a reasonable value for
+ output_section. Any special sections must be set up to meet
+ these requirements. */
+ oldval = isym->st_value;
+ isym->st_value += isec->output_offset;
+ if (! finfo->info->relocateable)
+ isym->st_value += isec->output_section->vma;
+
+ if (! elf_link_output_sym (finfo, name, isym))
+ return false;
+
+ /* Restore the old value for reloc handling. */
+ isym->st_value = oldval;
+ }
+
+ /* Relocate the contents of each section. */
+ for (o = input_bfd->sections; o != NULL; o = o->next)
+ {
+ Elf_Internal_Shdr *input_rel_hdr;
+
+ if ((o->flags & SEC_HAS_CONTENTS) == 0)
+ continue;
+
+ /* Read the contents of the section. */
+ if (! bfd_get_section_contents (input_bfd, o, finfo->contents,
+ (file_ptr) 0, o->_raw_size))
+ return false;
+
+ if ((o->flags & SEC_RELOC) != 0)
+ {
+ /* Read in the relocs. */
+ input_rel_hdr = &elf_section_data (o)->rel_hdr;
+ if (bfd_seek (input_bfd, input_rel_hdr->sh_offset, SEEK_SET) != 0
+ || bfd_read (finfo->external_relocs, 1, input_rel_hdr->sh_size,
+ input_bfd) != input_rel_hdr->sh_size)
+ return false;
+
+ /* Swap in the relocs. For convenience, we always produce
+ an Elf_Internal_Rela array; if the relocs are Rel, we set
+ the addend to 0. */
+ if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rel))
+ {
+ Elf_External_Rel *erel;
+ Elf_External_Rel *erelend;
+ Elf_Internal_Rela *irela;
+
+ erel = (Elf_External_Rel *) finfo->external_relocs;
+ erelend = erel + o->reloc_count;
+ irela = finfo->internal_relocs;
+ for (; erel < erelend; erel++, irela++)
+ {
+ Elf_Internal_Rel irel;
+
+ elf_swap_reloc_in (input_bfd, erel, &irel);
+ irela->r_offset = irel.r_offset;
+ irela->r_info = irel.r_info;
+ irela->r_addend = 0;
+ }
+ }
+ else
+ {
+ Elf_External_Rela *erela;
+ Elf_External_Rela *erelaend;
+ Elf_Internal_Rela *irela;
+
+ BFD_ASSERT (input_rel_hdr->sh_entsize
+ == sizeof (Elf_External_Rela));
+
+ erela = (Elf_External_Rela *) finfo->external_relocs;
+ erelaend = erela + o->reloc_count;
+ irela = finfo->internal_relocs;
+ for (; erela < erelaend; erela++, irela++)
+ elf_swap_reloca_in (input_bfd, erela, irela);
+ }
+
+ /* Relocate the section by invoking a back end routine.
+
+ The back end routine is responsible for adjusting the
+ section contents as necessary, and (if using Rela relocs
+ and generating a relocateable output file) adjusting the
+ reloc addend as necessary.
+
+ The back end routine does not have to worry about setting
+ the reloc address or the reloc symbol index.
+
+ The back end routine is given a pointer to the swapped in
+ internal symbols, and can access the hash table entries
+ for the external symbols via elf_sym_hashes (input_bfd).
+
+ When generating relocateable output, the back end routine
+ must handle STB_LOCAL/STT_SECTION symbols specially. The
+ output symbol is going to be a section symbol
+ corresponding to the output section, which will require
+ the addend to be adjusted. */
+
+ if (! (*relocate_section) (output_bfd, finfo->info,
+ input_bfd, o,
+ finfo->contents,
+ finfo->internal_relocs,
+ finfo->internal_syms,
+ finfo->sections))
+ return false;
+
+ if (finfo->info->relocateable)
+ {
+ Elf_Internal_Rela *irela;
+ Elf_Internal_Rela *irelaend;
+ struct elf_link_hash_entry **rel_hash;
+ Elf_Internal_Shdr *output_rel_hdr;
+
+ /* Adjust the reloc addresses and symbol indices. */
+
+ irela = finfo->internal_relocs;
+ irelaend = irela + o->reloc_count;
+ rel_hash = (elf_section_data (o->output_section)->rel_hashes
+ + o->output_section->reloc_count);
+ for (; irela < irelaend; irela++, rel_hash++)
+ {
+ long r_symndx;
+ Elf_Internal_Sym *isym;
+ asection *sec;
+
+ irela->r_offset += o->output_offset;
+
+ r_symndx = ELF_R_SYM (irela->r_info);
+
+ if (r_symndx == 0)
+ continue;
+
+ if (r_symndx >= symtab_hdr->sh_info)
+ {
+ long indx;
+
+ /* This is a reloc against a global symbol. We
+ have not yet output all the local symbols, so
+ we do not know the symbol index of any global
+ symbol. We set the rel_hash entry for this
+ reloc to point to the global hash table entry
+ for this symbol. The symbol index is then
+ set at the end of elf_bfd_final_link. */
+ indx = r_symndx - symtab_hdr->sh_info;
+ *rel_hash = elf_sym_hashes (input_bfd)[indx];
+
+ /* Setting the index to -2 tells
+ elf_link_output_extsym that this symbol is
+ used by a reloc. */
+ BFD_ASSERT ((*rel_hash)->indx < 0);
+ (*rel_hash)->indx = -2;
+
+ continue;
+ }
+
+ /* This is a reloc against a local symbol. */
+
+ *rel_hash = NULL;
+ isym = finfo->internal_syms + r_symndx;
+ sec = finfo->sections[r_symndx];
+ if (ELF_ST_TYPE (isym->st_info) == STT_SECTION)
+ {
+ /* I suppose the backend ought to fill in the
+ section of any STT_SECTION symbol against a
+ processor specific section. */
+ if (sec == NULL
+ || sec == &bfd_und_section
+ || sec == &bfd_com_section)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+ else if (sec == &bfd_abs_section)
+ r_symndx = 0;
+ else
+ {
+ r_symndx = sec->output_section->target_index;
+ if (r_symndx == 0)
+ abort ();
+ }
+ }
+ else
+ {
+ if (finfo->indices[r_symndx] == -1)
+ {
+ unsigned long link;
+ const char *name;
+ asection *osec;
+
+ if (finfo->info->strip == strip_all)
+ {
+ /* You can't do ld -r -s. */
+ bfd_set_error (bfd_error_invalid_operation);
+ return false;
+ }
+
+ /* This symbol was skipped earlier, but
+ since it is needed by a reloc, we
+ must output it now. */
+ link = symtab_hdr->sh_link;
+ name = elf_string_from_elf_section (input_bfd,
+ link,
+ isym->st_name);
+ if (name == NULL)
+ return false;
+
+ osec = sec->output_section;
+ isym->st_shndx =
+ elf_section_from_bfd_section (output_bfd,
+ osec);
+ if (isym->st_shndx == (unsigned short) -1)
+ return false;
+
+ isym->st_value += sec->output_offset;
+ if (! finfo->info->relocateable)
+ isym->st_value += osec->vma;
+
+ finfo->indices[r_symndx] = output_bfd->symcount;
+
+ if (! elf_link_output_sym (finfo, name, isym))
+ return false;
+ }
+
+ r_symndx = finfo->indices[r_symndx];
+ }
+
+ irela->r_info = ELF_R_INFO (r_symndx,
+ ELF_R_TYPE (irela->r_info));
+ }
+
+ /* Swap out the relocs. */
+ output_rel_hdr = &elf_section_data (o->output_section)->rel_hdr;
+ BFD_ASSERT (output_rel_hdr->sh_entsize
+ == input_rel_hdr->sh_entsize);
+ irela = finfo->internal_relocs;
+ irelaend = irela + o->reloc_count;
+ if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rel))
+ {
+ Elf_External_Rel *erel;
+
+ erel = ((Elf_External_Rel *) output_rel_hdr->contents
+ + o->output_section->reloc_count);
+ for (; irela < irelaend; irela++, erel++)
+ {
+ Elf_Internal_Rel irel;
+
+ irel.r_offset = irela->r_offset;
+ irel.r_info = irela->r_info;
+ BFD_ASSERT (irela->r_addend == 0);
+ elf_swap_reloc_out (output_bfd, &irel, erel);
+ }
+ }
+ else
+ {
+ Elf_External_Rela *erela;
+
+ BFD_ASSERT (input_rel_hdr->sh_entsize
+ == sizeof (Elf_External_Rela));
+ erela = ((Elf_External_Rela *) output_rel_hdr->contents
+ + o->output_section->reloc_count);
+ for (; irela < irelaend; irela++, erela++)
+ elf_swap_reloca_out (output_bfd, irela, erela);
+ }
+
+ o->output_section->reloc_count += o->reloc_count;
+ }
+ }
+
+ /* Write out the modified section contents. */
+ if (! bfd_set_section_contents (output_bfd, o->output_section,
+ finfo->contents, o->output_offset,
+ (o->_cooked_size != 0
+ ? o->_cooked_size
+ : o->_raw_size)))
+ return false;
+ }
+
+ return true;
+}
+
+/* Generate a reloc when linking an ELF file. This is a reloc
+ requested by the linker, and does come from any input file. This
+ is used to build constructor and destructor tables when linking
+ with -Ur. */
+
+static boolean
+elf_reloc_link_order (output_bfd, info, output_section, link_order)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ asection *output_section;
+ struct bfd_link_order *link_order;
+{
+ const reloc_howto_type *howto;
+ long indx;
+ bfd_vma offset;
+ struct elf_link_hash_entry **rel_hash_ptr;
+ Elf_Internal_Shdr *rel_hdr;
+
+ howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc);
+ if (howto == NULL)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+
+ /* If this is an inplace reloc, we must write the addend into the
+ object file. */
+ if (howto->partial_inplace
+ && link_order->u.reloc.p->addend != 0)
+ {
+ bfd_size_type size;
+ bfd_reloc_status_type rstat;
+ bfd_byte *buf;
+ boolean ok;
+
+ size = bfd_get_reloc_size (howto);
+ buf = (bfd_byte *) bfd_zmalloc (size);
+ if (buf == (bfd_byte *) NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ rstat = _bfd_relocate_contents (howto, output_bfd,
+ link_order->u.reloc.p->addend, buf);
+ switch (rstat)
+ {
+ case bfd_reloc_ok:
+ break;
+ default:
+ case bfd_reloc_outofrange:
+ abort ();
+ case bfd_reloc_overflow:
+ if (! ((*info->callbacks->reloc_overflow)
+ (info,
+ (link_order->type == bfd_section_reloc_link_order
+ ? bfd_section_name (output_bfd,
+ link_order->u.reloc.p->u.section)
+ : link_order->u.reloc.p->u.name),
+ howto->name, link_order->u.reloc.p->addend,
+ (bfd *) NULL, (asection *) NULL, (bfd_vma) 0)))
+ {
+ free (buf);
+ return false;
+ }
+ break;
+ }
+ ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf,
+ (file_ptr) link_order->offset, size);
+ free (buf);
+ if (! ok)
+ return false;
+ }
+
+ /* Figure out the symbol index. */
+ rel_hash_ptr = (elf_section_data (output_section)->rel_hashes
+ + output_section->reloc_count);
+ if (link_order->type == bfd_section_reloc_link_order)
+ {
+ indx = link_order->u.reloc.p->u.section->target_index;
+ if (indx == 0)
+ abort ();
+ *rel_hash_ptr = NULL;
+ }
+ else
+ {
+ struct elf_link_hash_entry *h;
+
+ h = elf_link_hash_lookup (elf_hash_table (info),
+ link_order->u.reloc.p->u.name,
+ false, false, true);
+ if (h != NULL)
+ {
+ /* Setting the index to -2 tells elf_link_output_extsym that
+ this symbol is used by a reloc. */
+ h->indx = -2;
+ *rel_hash_ptr = h;
+ indx = 0;
+ }
+ else
+ {
+ if (! ((*info->callbacks->unattached_reloc)
+ (info, link_order->u.reloc.p->u.name, (bfd *) NULL,
+ (asection *) NULL, (bfd_vma) 0)))
+ return false;
+ indx = 0;
+ }
+ }
+
+ /* The address of a reloc is relative to the section in a
+ relocateable file, and is a virtual address in an executable
+ file. */
+ offset = link_order->offset;
+ if (! info->relocateable)
+ offset += output_section->vma;
+
+ rel_hdr = &elf_section_data (output_section)->rel_hdr;
+
+ if (rel_hdr->sh_type == SHT_REL)
+ {
+ Elf_Internal_Rel irel;
+ Elf_External_Rel *erel;
+
+ irel.r_offset = offset;
+ irel.r_info = ELF_R_INFO (indx, howto->type);
+ erel = ((Elf_External_Rel *) rel_hdr->contents
+ + output_section->reloc_count);
+ elf_swap_reloc_out (output_bfd, &irel, erel);
+ }
+ else
+ {
+ Elf_Internal_Rela irela;
+ Elf_External_Rela *erela;
+
+ irela.r_offset = offset;
+ irela.r_info = ELF_R_INFO (indx, howto->type);
+ irela.r_addend = link_order->u.reloc.p->addend;
+ erela = ((Elf_External_Rela *) rel_hdr->contents
+ + output_section->reloc_count);
+ elf_swap_reloca_out (output_bfd, &irela, erela);
+ }
+
+ ++output_section->reloc_count;
+
+ return true;
+}
projects / binutils-gdb.git / blobdiff