/* 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
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
/* Problems and other issues to resolve.
(1) BFD expects there to be some fixed number of "sections" in
section header table is missing, then gdb should probably try
to make do with the program header table. (FIXME)
-*/
+ (2) The code in this file is compiled twice, once in 32-bit mode 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 <string.h> /* For strrchr and friends */
#include "bfd.h"
#include "libbfd.h"
#include "libelf.h"
+/* 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_Shdr NAME(Elf,External_Shdr)
#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_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_mkobject NAME(bfd_elf,mkobject)
-#define elf_write_object_contents NAME(bfd_elf,write_object_contents)
#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_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_get_sect_thunk NAME(bfd_elf,get_sect_thunk)
-#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)
-
-#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 */
-#endif
-
-#ifndef INLINE
-#if __GNUC__ >= 2
-#define INLINE __inline__
-#else
-#define INLINE
+#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 ELFCLASS ELFCLASS64
+#define FILE_ALIGN 8
#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 ELFCLASS ELFCLASS32
+#define FILE_ALIGN 4
#endif
-/* Forward declarations of static functions */
+static int shstrtab_length_fixed;
+
+struct elf_sect_data
+ {
+ int reloc_sec;
+ /* more? */
+ };
-static char * elf_read PARAMS ((bfd *, long, int));
+/* Forward declarations of static functions */
-static struct sec * section_from_elf_index PARAMS ((bfd *, int));
+static struct sec *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 char * elf_get_str_section PARAMS ((bfd *, unsigned int));
+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 *));
-
-/* Some private data is stashed away for future use using the tdata pointer
- in the bfd structure. */
-
-struct elf_obj_tdata
-{
- Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */
- Elf_Internal_Shdr *elf_sect_ptr;
- struct strtab *strtab_ptr;
- int symtab_section;
- int num_locals;
- int num_globals;
- int *symtab_map;
- void *prstatus; /* The raw /proc prstatus structure */
- void *prpsinfo; /* The raw /proc prpsinfo structure */
- Elf_External_Sym *raw_syms;
- Elf_Internal_Sym *internal_syms;
- elf_symbol_type *symbols;
-};
+ struct symbol_cache_entry **));
+
+static boolean elf_map_symbols PARAMS ((bfd *));
+static boolean swap_out_syms PARAMS ((bfd *));
-#define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
-#define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
-#define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
-#define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr)
-#define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
-#define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals)
-#define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals)
-#define elf_symtab_map(bfd) (elf_tdata(bfd) -> symtab_map)
-#define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
-#define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
-#define obj_symbols(bfd) (elf_tdata(bfd) -> symbols)
-#define obj_raw_syms(bfd) (elf_tdata(bfd) -> raw_syms)
-#define obj_internal_syms(bfd) (elf_tdata(bfd) -> internal_syms)
+#ifdef DEBUG
+static void elf_debug_section PARAMS ((char *, int, Elf_Internal_Shdr *));
+static void elf_debug_file PARAMS ((Elf_Internal_Ehdr *));
+#endif
+#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
+ can be handled by explicitly specifying 32 bits or "the long type". */
#if ARCH_SIZE == 64
#define put_word bfd_h_put_64
#define get_word bfd_h_get_64
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);
dst->p_align = get_word (abfd, (bfd_byte *) src->p_align);
}
-/* ... */
-
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 void
-DEFUN (elf_swap_reloc_in, (abfd, src, dst),
- bfd * abfd AND
- Elf_External_Rel * src AND
- Elf_Internal_Rel * dst)
+static 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 void
-DEFUN (elf_swap_reloca_in, (abfd, src, dst),
- bfd * abfd AND
- Elf_External_Rela * src AND
- Elf_Internal_Rela * dst)
+static 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 void
-DEFUN (elf_swap_reloc_out, (abfd, src, dst),
- bfd * abfd AND
- Elf_Internal_Rel * src AND
- Elf_External_Rel * dst)
+static 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 void
-DEFUN (elf_swap_reloca_out, (abfd, src, dst),
- bfd * abfd AND
- Elf_Internal_Rela * src AND
- Elf_External_Rela * dst)
+static 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
-/*
-INTERNAL_FUNCTION
- bfd_elf_find_section
-
-SYNOPSIS
- struct elf_internal_shdr *bfd_elf32_find_section (bfd *abfd, char *name);
-
-DESCRIPTION
- Helper functions for GDB to locate the string tables.
- Since BFD hides string tables from callers, GDB needs to use an
- internal hook to find them. Sun's .stabstr, in particular,
- isn't even pointed to by the .stab section, so ordinary
- mechanisms wouldn't work to find it, even if we had some.
-*/
-struct elf_internal_shdr *
-DEFUN (NAME (bfd_elf,find_section), (abfd, name),
- bfd * abfd AND
- char *name)
+/* String table creation/manipulation routines */
+
+static struct strtab *
+bfd_new_strtab (abfd)
+ bfd *abfd;
{
- Elf_Internal_Shdr *i_shdrp;
- Elf_Internal_Shdr *gotit = NULL;
- char *shstrtab;
- unsigned int max;
- unsigned int i;
+ struct strtab *ss;
- i_shdrp = elf_elfsections (abfd);
- if (i_shdrp != NULL)
+ ss = (struct strtab *) malloc (sizeof (struct strtab));
+ if (!ss)
{
- shstrtab = elf_get_str_section (abfd, elf_elfheader (abfd)->e_shstrndx);
- if (shstrtab != NULL)
- {
- max = elf_elfheader (abfd)->e_shnum;
- for (i = 1; i < max; i++)
- {
- if (!strcmp (&shstrtab[i_shdrp[i].sh_name], name))
- {
- gotit = &i_shdrp[i];
- }
- }
- }
+ bfd_set_error (bfd_error_no_memory);
+ return NULL;
}
- return gotit;
-}
-
-/* End of GDB support. */
-
-static char *
-DEFUN (elf_get_str_section, (abfd, shindex),
- bfd * abfd AND
- unsigned int shindex)
-{
- Elf_Internal_Shdr *i_shdrp;
- char *shstrtab = NULL;
- unsigned int offset;
- unsigned int shstrtabsize;
-
- i_shdrp = elf_elfsections (abfd);
- if (i_shdrp != NULL)
+ ss->tab = malloc (1);
+ if (!ss->tab)
{
- shstrtab = i_shdrp[shindex].rawdata;
- if (shstrtab == NULL)
- {
- /* No cached one, attempt to read, and cache what we read. */
- offset = i_shdrp[shindex].sh_offset;
- shstrtabsize = i_shdrp[shindex].sh_size;
- shstrtab = elf_read (abfd, offset, shstrtabsize);
- i_shdrp[shindex].rawdata = (void *) shstrtab;
- }
+ bfd_set_error (bfd_error_no_memory);
+ return NULL;
}
- return shstrtab;
+ *ss->tab = 0;
+ ss->nentries = 0;
+ ss->length = 1;
+
+ return ss;
}
-static char *
-DEFUN (elf_string_from_elf_section, (abfd, shindex, strindex),
- bfd * abfd AND
- unsigned int shindex AND
- unsigned int strindex)
+static int
+bfd_add_to_strtab (abfd, ss, str)
+ bfd *abfd;
+ struct strtab *ss;
+ CONST char *str;
{
- Elf_Internal_Shdr *hdr;
-
- if (strindex == 0)
- return "";
+ /* should search first, but for now: */
+ /* include the trailing NUL */
+ int ln = strlen (str) + 1;
- hdr = elf_elfsections (abfd) + shindex;
+ /* should this be using obstacks? */
+ ss->tab = realloc (ss->tab, ss->length + ln);
- if (!hdr->rawdata
- && elf_get_str_section (abfd, shindex) == NULL)
- return NULL;
+ BFD_ASSERT (ss->tab != 0); /* FIXME */
+ strcpy (ss->tab + ss->length, str);
+ ss->nentries++;
+ ss->length += ln;
- return ((char *) hdr->rawdata) + strindex;
+ return ss->length - ln;
}
-static INLINE char *
-elf_string_from_elf_strtab (abfd, strindex)
+static int
+bfd_add_2_to_strtab (abfd, ss, str, str2)
bfd *abfd;
- int strindex;
+ struct strtab *ss;
+ char *str;
+ CONST char *str2;
{
- return elf_string_from_elf_section (abfd, elf_elfheader (abfd)->e_shstrndx,
- strindex);
+ /* should search first, but for now: */
+ /* include the trailing NUL */
+ int ln = strlen (str) + strlen (str2) + 1;
+
+ /* should this be using obstacks? */
+ if (ss->length)
+ ss->tab = realloc (ss->tab, ss->length + ln);
+ else
+ ss->tab = malloc (ln);
+
+ BFD_ASSERT (ss->tab != 0); /* FIXME */
+ strcpy (ss->tab + ss->length, str);
+ strcpy (ss->tab + ss->length + strlen (str), str2);
+ ss->nentries++;
+ ss->length += ln;
+
+ 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 *i_shdrp = elf_elfsections (abfd);
- Elf_Internal_Shdr *hdr = i_shdrp + shindex;
+ Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
+ Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
asection *newsect;
char *name;
return true;
case SHT_PROGBITS:
+ case SHT_DYNAMIC:
/* 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; /* so we can read back the bits */
newsect->flags |= SEC_HAS_CONTENTS;
- newsect->alignment_power = hdr->sh_addralign;
+ 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)
{
if (hdr->sh_flags & SHF_EXECINSTR)
newsect->flags |= SEC_CODE; /* FIXME: may only contain SOME code */
- else
+ else if (newsect->flags & SEC_ALLOC)
newsect->flags |= SEC_DATA;
+ /* The debugging sections appear to recognized only by
+ name. */
+ if (strncmp (name, ".debug", sizeof ".debug" - 1) == 0
+ || strncmp (name, ".line", sizeof ".line" - 1) == 0
+ || strncmp (name, ".stab", sizeof ".stab" - 1) == 0)
+ newsect->flags |= SEC_DEBUGGING;
+
hdr->rawdata = (void *) newsect;
}
else
newsect->vma = hdr->sh_addr;
newsect->_raw_size = hdr->sh_size;
newsect->filepos = hdr->sh_offset; /* fake */
- newsect->alignment_power = hdr->sh_addralign;
+ 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;
+ /* FIXME: This section is empty. Does it really make
+ sense to set SEC_CODE for it? */
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_SYMTAB: /* A symbol table */
+ if (elf_onesymtab (abfd) == shindex)
+ return true;
+
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;
+ 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 (!strcmp (name, ".strtab") || !strcmp (name, ".shstrtab"))
+ if (hdr->rawdata)
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;
+ return true;
+ }
+ {
+ unsigned int i;
- if (!hdr->rawdata)
+ for (i = 1; i < ehdr->e_shnum; i++)
+ {
+ Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
+ if (hdr2->sh_link == shindex)
+ {
+ bfd_section_from_shdr (abfd, i);
+ if (elf_onesymtab (abfd) == i)
+ {
+ 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 */
+ /* We have a strtab for some random other section. */
+ newsect = (asection *) hdr2->rawdata;
+ if (!newsect)
+ break;
+ hdr->rawdata = (PTR) newsect;
+ hdr2 = &elf_section_data (newsect)->str_hdr;
+ *hdr2 = *hdr;
+ elf_elfsections (abfd)[shindex] = hdr2;
+#endif
+ }
+ }
+ }
+
+ newsect = bfd_make_section (abfd, name);
+ if (newsect)
{
- newsect = bfd_make_section (abfd, name);
- if (newsect)
- newsect->flags = SEC_HAS_CONTENTS;
+ newsect->flags = SEC_HAS_CONTENTS;
+ hdr->rawdata = (PTR) newsect;
+ newsect->_raw_size = hdr->sh_size;
+ newsect->alignment_power = bfd_log2 (hdr->sh_addralign);
+ newsect->vma = hdr->sh_addr;
+ newsect->filepos = hdr->sh_offset;
+
+ 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 if (newsect->flags & SEC_ALLOC)
+ newsect->flags |= SEC_DATA;
+
+ /* Check for debugging string tables. */
+ if (strncmp (name, ".debug", sizeof ".debug" - 1) == 0
+ || strncmp (name, ".stab", sizeof ".stab" - 1) == 0)
+ newsect->flags |= SEC_DEBUGGING;
}
return true;
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. */
+ /* *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 */
+ 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 */
{
asection *target_sect;
+ Elf_Internal_Shdr *hdr2;
int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
/* Don't allow REL relocations on a machine that uses RELA and
BFD_ASSERT (!(!use_rela_p && (hdr->sh_type == SHT_RELA)));
BFD_ASSERT (hdr->sh_entsize ==
(use_rela_p
- ? sizeof (Elf32_External_Rela)
- : sizeof (Elf32_External_Rel)));
+ ? sizeof (Elf_External_Rela)
+ : sizeof (Elf_External_Rel)));
- bfd_section_from_shdr (abfd, hdr->sh_link); /* symbol table */
bfd_section_from_shdr (abfd, hdr->sh_info); /* target */
+ bfd_section_from_shdr (abfd, hdr->sh_link); /* symbol table */
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;
-#if 0
- /* FIXME: We are only prepared to read one symbol table, so
- do NOT read the dynamic symbol table since it is only a
- subset of the full symbol table. Also see comment above. -fnf */
- if (!elf_slurp_symbol_table (abfd, i_shdrp + hdr->sh_link))
- return false;
-#endif
-
+ hdr2 = &elf_section_data (target_sect)->rel_hdr;
+ *hdr2 = *hdr;
+ 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->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)
-{
- sec->symbol->name = "";
- return true;
-}
-
-static struct strtab *
-DEFUN (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->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)
-{
- /* should search first, but for now: */
- /* include the trailing NUL */
- int ln = strlen (str) + 1;
-
- /* should this be using obstacks? */
- ss->tab = realloc (ss->tab, ss->length + ln);
-
- BFD_ASSERT (ss->tab != 0);
- strcpy (ss->tab + ss->length, str);
- ss->nentries++;
- ss->length += ln;
-
- return 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)
+elf_new_section_hook (abfd, sec)
+ bfd *abfd
+ ;
+ asection *sec;
{
- /* should search first, but for now: */
- /* include the trailing NUL */
- int ln = strlen (str) + strlen (str2) + 1;
-
- /* should this be using obstacks? */
- if (ss->length)
- ss->tab = realloc (ss->tab, ss->length + ln);
- else
- ss->tab = bfd_xmalloc (ln);
-
- BFD_ASSERT (ss->tab != 0);
- strcpy (ss->tab + ss->length, str);
- strcpy (ss->tab + ss->length + strlen (str), str2);
- ss->nentries++;
- ss->length += ln;
-
- return ss->length - ln;
-}
-
-/* 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 = 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;
- }
+ struct bfd_elf_section_data *sdata;
- if (sect->flags & SEC_HAS_CONTENTS)
- {
- hdr[indx].sh_offset = sect->filepos;
- hdr[indx].sh_size = sect->_raw_size;
- }
- if (sect->flags & SEC_ALLOC)
+ sdata = (struct bfd_elf_section_data *) bfd_alloc (abfd, sizeof (*sdata));
+ if (!sdata)
{
- hdr[indx].sh_flags |= SHF_ALLOC;
- if (sect->flags & SEC_LOAD)
- {
- /* do something with sh_type ? */
- }
+ bfd_set_error (bfd_error_no_memory);
+ return false;
}
- if (!(sect->flags & SEC_READONLY))
- hdr[indx].sh_flags |= SHF_WRITE;
-
- if (sect->flags & SEC_CODE)
- hdr[indx].sh_flags |= SHF_EXECINSTR;
-
+ sec->used_by_bfd = (PTR) sdata;
+ memset (sdata, 0, sizeof (*sdata));
return true;
}
-#endif
/* Create a new bfd section from an ELF program header.
*/
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);
newsect->vma = hdr->p_vaddr;
{
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);
newsect->vma = hdr->p_vaddr + hdr->p_filesz;
return true;
}
-#ifdef HAVE_PROCFS
+/* Begin processing a given object.
-static void
-DEFUN (bfd_prstatus, (abfd, descdata, descsz, filepos),
- bfd * abfd AND
- char *descdata AND
- int descsz AND
- long filepos)
-{
- asection *newsect;
- prstatus_t *status = (prstatus_t *) 0;
+ First we validate the file by reading in the ELF header and checking
+ the magic number. */
- if (descsz == sizeof (prstatus_t))
- {
- newsect = bfd_make_section (abfd, ".reg");
- newsect->_raw_size = sizeof (status->pr_reg);
- newsect->filepos = filepos + (long) &status->pr_reg;
- newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS;
- newsect->alignment_power = 2;
- if ((core_prstatus (abfd) = bfd_alloc (abfd, descsz)) != NULL)
- {
- memcpy (core_prstatus (abfd), descdata, descsz);
- }
- }
+static INLINE boolean
+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_MAG2] == ELFMAG2)
+ && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3));
}
-/* Stash a copy of the prpsinfo structure away for future use. */
+/* Check to see if the file associated with ABFD matches the target vector
+ that ABFD points to.
-static void
-DEFUN (bfd_prpsinfo, (abfd, descdata, descsz, filepos),
- bfd * abfd AND
- char *descdata AND
- int descsz AND
- long filepos)
-{
- asection *newsect;
+ 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.
- if (descsz == sizeof (prpsinfo_t))
- {
- if ((core_prpsinfo (abfd) = bfd_alloc (abfd, descsz)) != NULL)
- {
- memcpy (core_prpsinfo (abfd), descdata, descsz);
- }
- }
-}
+ FIXME: There is memory leak if we are called more than once with the same
+ ABFD, and that bfd already has tdata allocated, since we allocate more tdata
+ and the old tdata is orphaned. Since it's in the bfd obstack, there isn't
+ much we can do about this except possibly rewrite the code. There are
+ also other bfd_allocs that may be the source of memory leaks as well. */
-static void
-DEFUN (bfd_fpregset, (abfd, descdata, descsz, filepos),
- bfd * abfd AND
- char *descdata AND
- int descsz AND
- long filepos)
+bfd_target *
+elf_object_p (abfd)
+ bfd *abfd;
{
- asection *newsect;
-
- newsect = bfd_make_section (abfd, ".reg2");
- newsect->_raw_size = descsz;
- newsect->filepos = filepos;
- newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS;
- newsect->alignment_power = 2;
-}
-
-#endif /* HAVE_PROCFS */
+ 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 */
+ unsigned int shindex;
+ char *shstrtab; /* Internal copy of section header stringtab */
+ struct elf_backend_data *ebd;
+ struct elf_obj_tdata *preserved_tdata = elf_tdata (abfd);
-/* Return a pointer to the args (including the command name) that were
- seen by the program that generated the core dump. Note that for
- some reason, a spurious space is tacked onto the end of the args
- in some (at least one anyway) implementations, so strip it off if
- it exists. */
+ /* Read in the ELF header in external format. */
-char *
-DEFUN (elf_core_file_failing_command, (abfd),
- bfd * abfd)
-{
-#ifdef HAVE_PROCFS
- if (core_prpsinfo (abfd))
+ if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr))
{
- prpsinfo_t *p = core_prpsinfo (abfd);
- char *scan = p->pr_psargs;
- while (*scan++)
- {;
- }
- scan -= 2;
- if ((scan > p->pr_psargs) && (*scan == ' '))
- {
- *scan = '\000';
- }
- return p->pr_psargs;
+ if (bfd_get_error () != bfd_error_system_call)
+ goto got_wrong_format_error;
+ else
+ goto got_no_match;
}
-#endif
- return NULL;
-}
-/* Return the number of the signal that caused the core dump. Presumably,
- since we have a core file, we got a signal of some kind, so don't bother
- checking the other process status fields, just return the signal number.
- */
+ /* Now check to see if we have a valid ELF file, and one that BFD can
+ make use of. The magic number must match, the address size ('class')
+ and byte-swapping must match our XVEC entry, and it must have a
+ section header table (FIXME: See comments re sections at top of this
+ file). */
-int
-DEFUN (elf_core_file_failing_signal, (abfd),
- bfd * abfd)
-{
-#ifdef HAVE_PROCFS
- if (core_prstatus (abfd))
+ 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;
+
+ /* Check that file's byte order matches xvec's */
+ switch (x_ehdr.e_ident[EI_DATA])
{
- return ((prstatus_t *) (core_prstatus (abfd)))->pr_cursig;
+ case ELFDATA2MSB: /* Big-endian */
+ if (!abfd->xvec->header_byteorder_big_p)
+ goto got_wrong_format_error;
+ break;
+ case ELFDATA2LSB: /* Little-endian */
+ if (abfd->xvec->header_byteorder_big_p)
+ goto got_wrong_format_error;
+ break;
+ case ELFDATANONE: /* No data encoding specified */
+ default: /* Unknown data encoding specified */
+ goto got_wrong_format_error;
}
-#endif
- return -1;
-}
-/* Check to see if the core file could reasonably be expected to have
- come for the current executable file. Note that by default we return
- true unless we find something that indicates that there might be a
- problem.
- */
+ /* Allocate an instance of the elf_obj_tdata structure and hook it up to
+ the tdata pointer in the bfd. FIXME: memory leak, see above. */
-boolean
-DEFUN (elf_core_file_matches_executable_p, (core_bfd, exec_bfd),
- bfd * core_bfd AND
- bfd * exec_bfd)
-{
-#ifdef HAVE_PROCFS
- char *corename;
- char *execname;
+ elf_tdata (abfd) =
+ (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
+ if (elf_tdata (abfd) == NULL)
+ goto got_no_memory_error;
+
+ /* Now that we know the byte order, swap in the rest of the header */
+ i_ehdrp = elf_elfheader (abfd);
+ elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp);
+#if DEBUG & 1
+ elf_debug_file (i_ehdrp);
#endif
- /* First, xvecs must match since both are ELF files for the same target. */
+ /* If there is no section header table, we're hosed. */
+ if (i_ehdrp->e_shoff == 0)
+ goto got_wrong_format_error;
- if (core_bfd->xvec != exec_bfd->xvec)
+ /* 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);
+
+ /* Check that the ELF e_machine field matches what this particular
+ BFD format expects. */
+ if (ebd->elf_machine_code != i_ehdrp->e_machine)
{
- bfd_error = system_call_error;
- return false;
- }
+ bfd_target **target_ptr;
-#ifdef HAVE_PROCFS
+ if (ebd->elf_machine_code != EM_NONE)
+ goto got_wrong_format_error;
- /* If no prpsinfo, just return true. Otherwise, grab the last component
- of the exec'd pathname from the prpsinfo. */
+ /* 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 (core_prpsinfo (core_bfd))
- {
- corename = (((struct prpsinfo *) core_prpsinfo (core_bfd))->pr_fname);
+ 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;
+ }
+ }
}
- else
+
+
+ /* 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;
+
+ bfd_default_set_arch_mach (abfd, ebd->arch, 0);
+
+ /* 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)
{
- return true;
+ if ((*ebd->elf_backend_object_p) (abfd) == false)
+ goto got_wrong_format_error;
}
- /* Find the last component of the executable pathname. */
-
- if ((execname = strrchr (exec_bfd->filename, '/')) != NULL)
+ /* 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) == -1)
+ goto got_no_match;
+ for (shindex = 0; shindex < i_ehdrp->e_shnum; shindex++)
{
- execname++;
+ 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;
+
+ /* 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;
}
- else
+ if (i_ehdrp->e_shstrndx)
{
- execname = (char *) exec_bfd->filename;
+ bfd_section_from_shdr (abfd, i_ehdrp->e_shstrndx);
}
- /* See if they match */
+ /* Read in the string table containing the names of the sections. We
+ will need the base pointer to this table later. */
+ /* We read this inline now, so that we don't have to go through
+ bfd_section_from_shdr with it (since this particular strtab is
+ used to find all of the ELF section names.) */
- return strcmp (execname, corename) ? false : true;
+ shstrtab = elf_get_str_section (abfd, i_ehdrp->e_shstrndx);
+ if (!shstrtab)
+ goto got_wrong_format_error;
-#else
+ /* 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.
- return true;
+ 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. */
-#endif /* HAVE_PROCFS */
-}
+ for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++)
+ {
+ bfd_section_from_shdr (abfd, shindex);
+ }
-/* ELF core files contain a segment of type PT_NOTE, that holds much of
- the information that would normally be available from the /proc interface
- for the process, at the time the process dumped core. Currently this
- includes copies of the prstatus, prpsinfo, and fpregset structures.
+ return (abfd->xvec);
- Since these structures are potentially machine dependent in size and
- ordering, bfd provides two levels of support for them. The first level,
- available on all machines since it does not require that the host
- have /proc support or the relevant include files, is to create a bfd
- section for each of the prstatus, prpsinfo, and fpregset structures,
- without any interpretation of their contents. With just this support,
- the bfd client will have to interpret the structures itself. Even with
- /proc support, it might want these full structures for it's own reasons.
+ /* If we are going to use goto's to avoid duplicating error setting
+ and return(NULL) code, then this at least makes it more maintainable. */
- In the second level of support, where HAVE_PROCFS is defined, bfd will
- pick apart the structures to gather some additional information that
- clients may want, such as the general register set, the name of the
- exec'ed file and its arguments, the signal (if any) that caused the
- core dump, etc.
+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:
+ elf_tdata (abfd) = preserved_tdata;
+ return (NULL);
+}
+\f
- */
+/* ELF .o/exec file writing */
-static boolean
-DEFUN (elf_corefile_note, (abfd, hdr),
- bfd * abfd AND
- Elf_Internal_Phdr * hdr)
+/* 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 *
+elf_symbol_from (ignore_abfd, symbol)
+ bfd *ignore_abfd;
+ asymbol *symbol;
{
- Elf_External_Note *x_note_p; /* Elf note, external form */
- Elf_Internal_Note i_note; /* Elf note, internal form */
- char *buf = NULL; /* Entire note segment contents */
- char *namedata; /* Name portion of the note */
- char *descdata; /* Descriptor portion of the note */
- char *sectname; /* Name to use for new section */
- long filepos; /* File offset to descriptor data */
- asection *newsect;
+ if (symbol->the_bfd->xvec->flavour != bfd_target_elf_flavour)
+ return 0;
- if (hdr->p_filesz > 0
- && (buf = (char *) bfd_xmalloc (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)
- {
- x_note_p = (Elf_External_Note *) buf;
- while ((char *) x_note_p < (buf + hdr->p_filesz))
- {
- i_note.namesz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->namesz);
- i_note.descsz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->descsz);
- i_note.type = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->type);
- namedata = x_note_p->name;
- descdata = namedata + BFD_ALIGN (i_note.namesz, 4);
- filepos = hdr->p_offset + (descdata - buf);
- switch (i_note.type)
- {
- case NT_PRSTATUS:
- /* process descdata as prstatus info */
- bfd_prstatus (abfd, descdata, i_note.descsz, filepos);
- sectname = ".prstatus";
- break;
- case NT_FPREGSET:
- /* process descdata as fpregset info */
- bfd_fpregset (abfd, descdata, i_note.descsz, filepos);
- sectname = ".fpregset";
- break;
- case NT_PRPSINFO:
- /* process descdata as prpsinfo */
- bfd_prpsinfo (abfd, descdata, i_note.descsz, filepos);
- sectname = ".prpsinfo";
- break;
- default:
- /* Unknown descriptor, just ignore it. */
- sectname = NULL;
- break;
- }
- if (sectname != NULL)
- {
- newsect = bfd_make_section (abfd, sectname);
- newsect->_raw_size = i_note.descsz;
- newsect->filepos = filepos;
- newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS;
- newsect->alignment_power = 2;
- }
- x_note_p = (Elf_External_Note *)
- (descdata + BFD_ALIGN (i_note.descsz, 4));
- }
- }
- if (buf != NULL)
- {
- free (buf);
- }
- return true;
+ if (symbol->the_bfd->tdata.elf_obj_data == (struct elf_obj_tdata *) NULL)
+ return 0;
+ return (elf_symbol_type *) symbol;
}
+/* Create ELF output from BFD sections.
-/* Read a specified number of bytes at a specified offset in an ELF
- file, into a newly allocated buffer, and return a pointer to the
- buffer. */
+ Essentially, just create the section header and forget about the program
+ header for now. */
-static char *
-DEFUN (elf_read, (abfd, offset, size),
- bfd * abfd AND
- long offset AND
- int size)
+static void
+elf_make_sections (abfd, asect, obj)
+ bfd *abfd;
+ asection *asect;
+ PTR obj;
{
- char *buf;
+ /* most of what is in bfd_shdr_from_section goes in here... */
+ /* and all of these sections generate at *least* one ELF section. */
+ Elf_Internal_Shdr *this_hdr;
+ this_hdr = &elf_section_data (asect)->this_hdr;
- if ((buf = bfd_alloc (abfd, size)) == NULL)
- {
- bfd_error = no_memory;
- return NULL;
- }
- if (bfd_seek (abfd, offset, SEEK_SET) == -1)
+ this_hdr->sh_addr = asect->vma;
+ this_hdr->sh_size = asect->_raw_size;
+ /* contents already set by elf_set_section_contents */
+
+ if (asect->flags & SEC_RELOC)
{
- bfd_error = system_call_error;
- return NULL;
- }
- if (bfd_read ((PTR) buf, size, 1, abfd) != size)
- {
- bfd_error = system_call_error;
- return NULL;
- }
- return buf;
-}
-
-/* Begin processing a given object.
-
- First we validate the file by reading in the ELF header and checking
- the magic number. */
-
-static INLINE boolean
-DEFUN (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_MAG2] == ELFMAG2)
- && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3));
-}
-
-bfd_target *
-DEFUN (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;
- char *shstrtab; /* Internal copy of section header stringtab */
- struct elf_backend_data *ebd; /* Use to get ELF_ARCH stored in xvec */
+ /* emit a reloc section, and thus strtab and symtab... */
+ Elf_Internal_Shdr *rela_hdr;
+ int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
- /* Read in the ELF header in external format. */
+ rela_hdr = &elf_section_data (asect)->rel_hdr;
- if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr))
- {
- bfd_error = system_call_error;
- return NULL;
- }
+ /* orelocation has the data, reloc_count has the count... */
+ if (use_rela_p)
+ {
+ rela_hdr->sh_type = SHT_RELA;
+ rela_hdr->sh_entsize = sizeof (Elf_External_Rela);
+ }
+ else
+ /* REL relocations */
+ {
+ rela_hdr->sh_type = SHT_REL;
+ rela_hdr->sh_entsize = sizeof (Elf_External_Rel);
+ }
+ rela_hdr->sh_flags = 0;
+ rela_hdr->sh_addr = 0;
+ rela_hdr->sh_offset = 0;
- /* Now check to see if we have a valid ELF file, and one that BFD can
- make use of. The magic number must match, the address size ('class')
- and byte-swapping must match our XVEC entry, and it must have a
- section header table (FIXME: See comments re sections at top of this
- file). */
+ /* 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;
- if (elf_file_p (&x_ehdr) == false)
- {
- wrong:
- bfd_error = wrong_format;
- return NULL;
+ rela_hdr->size = 0;
}
-
- if (x_ehdr.e_ident[EI_VERSION] != EV_CURRENT)
- goto wrong;
-
- {
- unsigned int class = 0x12345;
-#if ARCH_SIZE == 64
- class = ELFCLASS64;
-#endif
-#if ARCH_SIZE == 32
- class = ELFCLASS32;
-#endif
- if (x_ehdr.e_ident[EI_CLASS] != class)
- goto wrong;
- }
-
- /* Switch xvec to match the specified byte order. */
- switch (x_ehdr.e_ident[EI_DATA])
+ if (asect->flags & SEC_ALLOC)
{
- case ELFDATA2MSB: /* Big-endian */
- if (!abfd->xvec->header_byteorder_big_p)
- goto wrong;
- break;
- case ELFDATA2LSB: /* Little-endian */
- if (abfd->xvec->header_byteorder_big_p)
- goto wrong;
- break;
- case ELFDATANONE: /* No data encoding specified */
- default: /* Unknown data encoding specified */
- goto wrong;
+ this_hdr->sh_flags |= SHF_ALLOC;
+ if (asect->flags & SEC_LOAD)
+ {
+ /* @@ Do something with sh_type? */
+ }
}
-
- /* 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))))
+ else
{
- bfd_error = no_memory;
- return NULL;
+ /* 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;
- /* FIXME: Any `wrong' exits below here will leak memory (tdata). */
-
- /* Now that we know the byte order, swap in the rest of the header */
- i_ehdrp = elf_elfheader (abfd);
- elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp);
+ if (asect->flags & SEC_CODE)
+ this_hdr->sh_flags |= SHF_EXECINSTR;
+}
- /* If there is no section header table, we're hosed. */
- if (i_ehdrp->e_shoff == 0)
- goto wrong;
+void
+write_relocs (abfd, sec, xxx)
+ bfd *abfd;
+ asection *sec;
+ PTR xxx;
+{
+ Elf_Internal_Shdr *rela_hdr;
+ Elf_External_Rela *outbound_relocas;
+ Elf_External_Rel *outbound_relocs;
+ int idx;
+ int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
+ asymbol *last_sym = 0;
+ int last_sym_idx = 9999999; /* should always be written before use */
- if (i_ehdrp->e_type == ET_EXEC || i_ehdrp->e_type == ET_DYN)
- abfd->flags |= EXEC_P;
+ if ((sec->flags & SEC_RELOC) == 0)
+ return;
+ /* Flags are sometimes inconsistent. */
+ if (sec->reloc_count == 0)
+ return;
- /* 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. */
+ rela_hdr = &elf_section_data (sec)->rel_hdr;
- ebd = get_elf_backend_data (abfd);
- switch (i_ehdrp->e_machine)
+ 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)
{
- default:
- case EM_NONE:
- case EM_M32:
- /* Arguably EM_M32 should be bfd_arch_obscure, but then we would
- need both an elf32-obscure target and an elf32-unknown target.
- The distinction is probably not worth worrying about. */
- if (ebd->arch != bfd_arch_unknown)
- goto wrong;
- bfd_default_set_arch_mach (abfd, bfd_arch_unknown, 0);
- break;
- case EM_SPARC:
- if (ebd->arch != bfd_arch_sparc)
- goto wrong;
- bfd_default_set_arch_mach (abfd, bfd_arch_sparc, 0);
- break;
- case EM_386:
- if (ebd->arch != bfd_arch_i386)
- goto wrong;
- bfd_default_set_arch_mach (abfd, bfd_arch_i386, 0);
- break;
- case EM_68K:
- if (ebd->arch != bfd_arch_m68k)
- goto wrong;
- bfd_default_set_arch_mach (abfd, bfd_arch_m68k, 0);
- break;
- case EM_88K:
- if (ebd->arch != bfd_arch_m88k)
- goto wrong;
- bfd_default_set_arch_mach (abfd, bfd_arch_m88k, 0);
- break;
- case EM_860:
- if (ebd->arch != bfd_arch_i860)
- goto wrong;
- bfd_default_set_arch_mach (abfd, bfd_arch_i860, 0);
- break;
- case EM_MIPS:
- if (ebd->arch != bfd_arch_mips)
- goto wrong;
- bfd_default_set_arch_mach (abfd, bfd_arch_mips, 0);
- break;
- case EM_HPPA:
- if (ebd->arch != bfd_arch_hppa)
- goto wrong;
- bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 0);
- break;
+ bfd_set_error (bfd_error_no_memory);
+ abort (); /* FIXME */
}
- /* 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. */
-
- 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);
- if (!i_shdrp)
- {
- bfd_error = no_memory;
- return NULL;
- }
- if (bfd_seek (abfd, i_ehdrp->e_shoff, SEEK_SET) == -1)
- {
- bfd_error = system_call_error;
- return NULL;
- }
- for (shindex = 0; shindex < i_ehdrp->e_shnum; shindex++)
+ /* orelocation has the data, reloc_count has the count... */
+ if (use_rela_p)
{
- if (bfd_read ((PTR) & x_shdr, sizeof x_shdr, 1, abfd)
- != sizeof (x_shdr))
- {
- bfd_error = system_call_error;
- return NULL;
- }
- elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex);
- }
+ outbound_relocas = (Elf_External_Rela *) rela_hdr->contents;
- elf_elfsections (abfd) = i_shdrp;
+ for (idx = 0; idx < sec->reloc_count; idx++)
+ {
+ Elf_Internal_Rela dst_rela;
+ Elf_External_Rela *src_rela;
+ arelent *ptr;
+ asymbol *sym;
+ int n;
+
+ ptr = sec->orelocation[idx];
+ src_rela = outbound_relocas + idx;
+ if (!(abfd->flags & EXEC_P))
+ dst_rela.r_offset = ptr->address - sec->vma;
+ else
+ dst_rela.r_offset = ptr->address;
- /* Read in the string table containing the names of the sections. We
- will need the base pointer to this table later. */
- /* We read this inline now, so that we don't have to go through
- bfd_section_from_shdr with it (since this particular strtab is
- used to find all of the ELF section names.) */
+ sym = *ptr->sym_ptr_ptr;
- shstrtab = elf_get_str_section (abfd, i_ehdrp->e_shstrndx);
- if (!shstrtab)
- return NULL;
+ /* If SYM is a section symbol for an input section, which
+ has been combined with other similar input sections (ld -r),
+ then adjust the addend by the output_offset of sym->section.
- /* 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.
+ Apparently elf_symbol_from_bfd_symbol doesn't provide a 1:1
+ mapping from bfd symbol to elf symbols in this case. */
+ if ((sym->flags & BSF_SECTION_SYM)
+ && sym->section)
+ ptr->addend += sym->section->output_offset;
- 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. */
+ if (sym == last_sym)
+ n = last_sym_idx;
+ else
+ {
+ last_sym = sym;
+ last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym);
+ }
+ dst_rela.r_info = ELF_R_INFO (n, ptr->howto->type);
- for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++)
- {
- bfd_section_from_shdr (abfd, shindex);
+ dst_rela.r_addend = ptr->addend;
+ elf_swap_reloca_out (abfd, &dst_rela, src_rela);
+ }
}
+ else
+ /* REL relocations */
+ {
+ outbound_relocs = (Elf_External_Rel *) rela_hdr->contents;
- /* Remember the entry point specified in the ELF file header. */
+ for (idx = 0; idx < sec->reloc_count; idx++)
+ {
+ Elf_Internal_Rel dst_rel;
+ Elf_External_Rel *src_rel;
+ arelent *ptr;
+ int n;
+ asymbol *sym;
+
+ ptr = sec->orelocation[idx];
+ sym = *ptr->sym_ptr_ptr;
+ src_rel = outbound_relocs + idx;
+ if (!(abfd->flags & EXEC_P))
+ dst_rel.r_offset = ptr->address - sec->vma;
+ else
+ dst_rel.r_offset = ptr->address;
- bfd_get_start_address (abfd) = i_ehdrp->e_entry;
+ if (sym == last_sym)
+ n = last_sym_idx;
+ else
+ {
+ last_sym = sym;
+ last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym);
+ }
+ dst_rel.r_info = ELF_R_INFO (n, ptr->howto->type);
- return abfd->xvec;
+ elf_swap_reloc_out (abfd, &dst_rel, src_rel);
+ }
+ }
}
-/*
- 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)
+static void
+fix_up_strtabs (abfd, asect, obj)
+ bfd *abfd;
+ asection *asect;
+ PTR obj;
{
- if (symbol->the_bfd->xvec->flavour != bfd_target_elf_flavour)
- return 0;
+ Elf_Internal_Shdr *this_hdr = &elf_section_data (asect)->this_hdr;
+ int this_idx = elf_section_data (asect)->this_idx;
- if (symbol->the_bfd->tdata.elf_obj_data == (struct elf_obj_tdata *) NULL)
- return 0;
+ /* @@ 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 = (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;
+ /* @@ Assuming 32 bits! */
+ elf_section_data (asect)->this_hdr.sh_entsize = 0xc;
- return (elf_symbol_type *) symbol;
+ this_hdr->sh_type = SHT_STRTAB;
+ }
}
-/* Core files are simply standard ELF formatted files that partition
- the file using the execution view of the file (program header table)
- rather than the linking view. In fact, there is no section header
- table in a core file.
+static void
+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. */
- The process status information (including the contents of the general
- register set) and the floating point register set are stored in a
- segment of type PT_NOTE. We handcraft a couple of extra bfd sections
- that allow standard bfd access to the general registers (.reg) and the
- floating point registers (.reg2).
+ Elf_Internal_Shdr *this_hdr;
+ this_hdr = &elf_section_data (asect)->this_hdr;
+ this_hdr->sh_name =
+ bfd_add_to_strtab (abfd, elf_shstrtab (abfd), asect->name);
+ /* 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))
+ this_hdr->sh_type = SHT_PROGBITS;
+ 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
+ this_hdr->sh_type = SHT_PROGBITS;
+
+ this_hdr->sh_flags = 0;
+ this_hdr->sh_addr = 0;
+ this_hdr->sh_size = 0;
+ this_hdr->sh_entsize = 0;
+ this_hdr->sh_info = 0;
+ this_hdr->sh_link = 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);
+ }
-bfd_target *
-DEFUN (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;
+ {
+ /* Emit a strtab and symtab, and possibly a reloc section. */
+ Elf_Internal_Shdr *rela_hdr;
- /* Read in the ELF header in external format. */
+ /* Note that only one symtab is used, so just remember it
+ for now. */
- if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr))
+ if (asect->flags & SEC_RELOC)
+ {
+ int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
+
+ rela_hdr = &elf_section_data (asect)->rel_hdr;
+ rela_hdr->sh_name =
+ bfd_add_2_to_strtab (abfd, elf_shstrtab (abfd),
+ use_rela_p ? ".rela" : ".rel",
+ asect->name);
+ rela_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
+ rela_hdr->sh_entsize = (use_rela_p
+ ? sizeof (Elf_External_Rela)
+ : sizeof (Elf_External_Rel));
+
+ rela_hdr->sh_flags = 0;
+ rela_hdr->sh_addr = 0;
+ rela_hdr->sh_size = 0;
+ rela_hdr->sh_offset = 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;
+ }
+ }
+ if (asect->flags & SEC_ALLOC)
{
- bfd_error = system_call_error;
- return NULL;
+ this_hdr->sh_flags |= SHF_ALLOC;
+ if (asect->flags & SEC_LOAD)
+ {
+ /* @@ Do something with sh_type? */
+ }
}
+ if (!(asect->flags & SEC_READONLY))
+ this_hdr->sh_flags |= SHF_WRITE;
+ if (asect->flags & SEC_CODE)
+ this_hdr->sh_flags |= SHF_EXECINSTR;
+}
- /* Now check to see if we have a valid ELF file, and one that BFD can
- make use of. The magic number must match, the address size ('class')
- and byte-swapping must match our XVEC entry, and it must have a
- program header table (FIXME: See comments re segments at top of this
- file). */
+/* Map symbol from it's internal number to the external number, moving
+ all local symbols to be at the head of the list. */
- if (elf_file_p (&x_ehdr) == false)
+static INLINE int
+sym_is_global (abfd, sym)
+ bfd *abfd;
+ asymbol *sym;
+{
+ /* 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))
{
- wrong:
- bfd_error = wrong_format;
- return NULL;
+ if (sym->flags & BSF_LOCAL)
+ abort ();
+ return 1;
}
-
- /* FIXME, Check EI_VERSION here ! */
-
- switch (x_ehdr.e_ident[EI_CLASS])
+ if (sym->section == 0)
{
- case ELFCLASSNONE: /* address size not specified */
- goto wrong; /* No support if can't tell address size */
- case ELFCLASS32: /* 32-bit addresses */
- break;
- case ELFCLASS64: /* 64-bit addresses */
- goto wrong; /* FIXME: 64 bits not yet supported */
- default:
- goto wrong; /* No support if unknown address class */
+ /* Is this valid? */
+ abort ();
+
+ return 1;
}
+ if (sym->section == &bfd_und_section)
+ return 1;
+ if (bfd_is_com_section (sym->section))
+ return 1;
+ if (sym->flags & (BSF_LOCAL | BSF_SECTION_SYM | BSF_FILE))
+ return 0;
+ return 0;
+}
- /* Switch xvec to match the specified byte order. */
- switch (x_ehdr.e_ident[EI_DATA])
+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;
+ Elf_Sym_Extra *sym_extra;
+ int idx;
+ asection *asect;
+
+#ifdef DEBUG
+ fprintf (stderr, "elf_map_symbols\n");
+ fflush (stderr);
+#endif
+
+ /* 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)
{
- case ELFDATA2MSB: /* Big-endian */
- if (abfd->xvec->byteorder_big_p == false)
- goto wrong;
- break;
- case ELFDATA2LSB: /* Little-endian */
- if (abfd->xvec->byteorder_big_p == true)
- goto wrong;
- break;
- case ELFDATANONE: /* No data encoding specified */
- default: /* Unknown data encoding specified */
- goto wrong;
+ if (max_index < asect->index)
+ max_index = asect->index;
}
- /* Allocate an instance of the elf_obj_tdata structure and hook it up to
- the tdata pointer in the bfd. */
+ 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;
- elf_tdata (abfd) =
- (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
- if (elf_tdata (abfd) == NULL)
+ if (sect_syms == 0)
{
- bfd_error = no_memory;
- return NULL;
+ bfd_set_error (bfd_error_no_memory);
+ return false;
}
- /* FIXME, `wrong' returns from this point onward, leak memory. */
+ for (asect = abfd->sections; asect; asect = asect->next)
+ {
+ 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
+ }
- /* Now that we know the byte order, swap in the rest of the header */
- i_ehdrp = elf_elfheader (abfd);
- elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp);
+ if (num_sections)
+ {
+ if (syms)
+ syms = (asymbol **) bfd_realloc (abfd, syms,
+ ((symcount + num_sections + 1)
+ * sizeof (asymbol *)));
+ else
+ syms = (asymbol **) bfd_alloc (abfd,
+ (num_sections + 1) * sizeof (asymbol *));
+ if (!syms)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
- /* 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)
- goto wrong;
+ for (asect = abfd->sections; asect; asect = asect->next)
+ {
+ if (sect_syms[asect->index])
+ syms[symcount++] = sect_syms[asect->index];
+ }
- /* Allocate space for a copy of the program header table in
- internal form, seek to the program 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 program
- header table entry actually matches the size recorded in the file. */
+ syms[symcount] = (asymbol *) 0;
+ bfd_set_symtab (abfd, syms, symcount);
+ }
- if (i_ehdrp->e_phentsize != sizeof (x_phdr))
- goto wrong;
- i_phdrp = (Elf_Internal_Phdr *)
- bfd_alloc (abfd, sizeof (*i_phdrp) * i_ehdrp->e_phnum);
- if (!i_phdrp)
+ elf_sym_extra (abfd) = sym_extra
+ = (Elf_Sym_Extra *) bfd_alloc (abfd, symcount * sizeof (Elf_Sym_Extra));
+ if (!sym_extra)
{
- bfd_error = no_memory;
- return NULL;
+ bfd_set_error (bfd_error_no_memory);
+ return false;
}
- if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1)
+
+ /* Identify and classify all of the symbols. */
+ for (idx = 0; idx < symcount; idx++)
{
- bfd_error = system_call_error;
- return NULL;
+ if (!sym_is_global (abfd, syms[idx]))
+ num_locals++;
+ else
+ num_globals++;
}
- for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++)
+
+ /* Now provide mapping information. Add +1 for skipping over the
+ dummy symbol. */
+ for (idx = 0; idx < symcount; idx++)
{
- if (bfd_read ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd)
- != sizeof (x_phdr))
- {
- bfd_error = system_call_error;
- return NULL;
- }
- elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex);
+ syms[idx]->udata = (PTR) & sym_extra[idx];
+ if (!sym_is_global (abfd, syms[idx]))
+ sym_extra[idx].elf_sym_num = 1 + num_locals2++;
+ else
+ sym_extra[idx].elf_sym_num = 1 + num_locals + num_globals2++;
}
- /* Once all of the program headers have been read and converted, we
- can start processing them. */
+ elf_num_locals (abfd) = num_locals;
+ elf_num_globals (abfd) = num_globals;
+ return true;
+}
- for (phindex = 0; phindex < i_ehdrp->e_phnum; 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);
- }
- }
+static boolean assign_section_numbers ();
+static boolean assign_file_positions_except_relocs ();
- /* Remember the entry point specified in the ELF file header. */
+static boolean
+elf_compute_section_file_positions (abfd)
+ bfd *abfd;
+{
+ bfd_map_over_sections (abfd, elf_fake_sections, 0);
- bfd_get_start_address (abfd) = i_ehdrp->e_entry;
+ if (!assign_section_numbers (abfd))
+ return false;
- return abfd->xvec;
+ bfd_map_over_sections (abfd, elf_make_sections, 0);
+
+ bfd_map_over_sections (abfd, fix_up_strtabs, 0); /* .stab/.stabstr &c */
+
+ if (swap_out_syms (abfd) == false)
+ return false;
+
+ if (!assign_file_positions_except_relocs (abfd))
+ return false;
+
+ return true;
}
-boolean
-DEFUN (elf_mkobject, (abfd), bfd * abfd)
+static boolean
+elf_write_phdrs (abfd, i_ehdrp, i_phdrp, phdr_cnt)
+ bfd *abfd;
+ Elf_Internal_Ehdr *i_ehdrp;
+ Elf_Internal_Phdr *i_phdrp;
+ unsigned short phdr_cnt;
{
- /* this just does initialization */
- /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
- elf_tdata (abfd) = (struct elf_obj_tdata *)
- bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
- if (elf_tdata (abfd) == 0)
+ /* first program header entry goes after the file header */
+ int outbase = i_ehdrp->e_phoff;
+ unsigned int i;
+ Elf_External_Phdr x_phdr;
+
+ for (i = 0; i < phdr_cnt; i++)
{
- bfd_error = no_memory;
- return false;
+ elf_swap_phdr_out (abfd, i_phdrp + i, &x_phdr);
+ if (bfd_seek (abfd, outbase, SEEK_SET) != 0
+ || (bfd_write ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd)
+ != sizeof (x_phdr)))
+ return false;
+ outbase += sizeof (x_phdr);
}
- /* since everything is done at close time, do we need any
- initialization? */
return true;
}
-/*
- Create ELF output from BFD sections.
-
- Essentially, just create the section header and forget about the program
- header for now.
-
-*/
+static const Elf_Internal_Shdr null_shdr;
-#if 0 /* not used */
-static int
-elf_idx_of_sym (abfd, sym)
+/* 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 boolean
+assign_section_numbers (abfd)
bfd *abfd;
- asymbol *sym;
{
+ struct elf_obj_tdata *t = elf_tdata (abfd);
+ asection *sec;
+ int section_number = 1;
int i;
- for (i = 0; i < abfd->symcount; 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_section = section_number++;
+ elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
+ if (abfd->symcount)
+ {
+ t->symtab_section = section_number++;
+ t->strtab_section = section_number++;
+ t->symtab_hdr.sh_link = t->strtab_section;
+ }
+ for (sec = abfd->sections; sec; sec = sec->next)
{
- if (sym == (asymbol *) abfd->outsymbols[i])
+ struct bfd_elf_section_data *d = elf_section_data (sec);
+ d->this_idx = section_number++;
+ if (sec->flags & SEC_RELOC)
{
- /* sanity check */
- BFD_ASSERT ((strcmp (sym->name, abfd->outsymbols[i]->name) == 0)
- || (strlen (sym->name) == 0));
- return i + 1;
+ d->rel_idx = section_number++;
+ d->rel_hdr.sh_link = t->symtab_section;
+ d->rel_hdr.sh_info = d->this_idx;
}
+ else
+ d->rel_idx = 0;
+ /* No handling for per-section string tables currently. */
+ }
+ 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 *));
+ if (!i_shdrp)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ elf_elfsections (abfd) = i_shdrp;
+ for (i = 0; i < section_number; i++)
+ i_shdrp[i] = 0;
+
+ i_shdrp[0] = (Elf_Internal_Shdr *) & null_shdr;
+ i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
+ if (abfd->symcount)
+ {
+ i_shdrp[t->symtab_section] = &t->symtab_hdr;
+ i_shdrp[t->strtab_section] = &t->strtab_hdr;
+ }
+ for (sec = abfd->sections; sec; sec = sec->next)
+ {
+ struct bfd_elf_section_data *d = elf_section_data (sec);
+ i_shdrp[d->this_idx] = &d->this_hdr;
+ if (d->rel_idx)
+ i_shdrp[d->rel_idx] = &d->rel_hdr;
}
- return STN_UNDEF;
+ /* Make sure we got everything.... */
+ for (i = 0; i < section_number; i++)
+ if (i_shdrp[i] == 0)
+ abort ();
+ return true;
}
-#endif
-static void
-DEFUN (elf_make_sections, (abfd, asect, obj),
- bfd * abfd AND
- asection * asect AND
- PTR obj)
+static INLINE file_ptr
+assign_file_position_for_section (i_shdrp, offset)
+ Elf_Internal_Shdr *i_shdrp;
+ file_ptr offset;
{
- elf_sect_thunk *thunk = (elf_sect_thunk *) 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 this_section;
- int idx;
+ int align;
- Elf_Internal_Shdr *this_hdr;
- this_section = elf_section_from_bfd_section (abfd, asect);
- this_hdr = &thunk->i_shdrp[this_section];
+ if (i_shdrp->sh_addralign != 0)
+ align = i_shdrp->sh_addralign;
+ else
+ align = 1;
+ i_shdrp->sh_offset = offset = BFD_ALIGN (offset, align);
+ 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;
+}
- this_hdr->sh_addr = asect->vma;
- this_hdr->sh_size = asect->_raw_size;
- /* contents already set by elf_set_section_contents */
+static INLINE file_ptr
+align_file_position (off)
+ file_ptr off;
+{
+ return (off + FILE_ALIGN - 1) & ~(FILE_ALIGN - 1);
+}
- if (asect->flags & SEC_RELOC)
- {
- /* emit a reloc section, and thus strtab and symtab... */
- Elf_Internal_Shdr *rela_hdr;
- Elf_Internal_Shdr *symtab_hdr;
- Elf_External_Rela *outbound_relocas;
- Elf_External_Rel *outbound_relocs;
- int rela_section;
- int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
+static INLINE file_ptr
+assign_file_positions_for_symtab_and_strtabs (abfd, off)
+ bfd *abfd;
+ file_ptr off;
+{
+ struct elf_obj_tdata *t = elf_tdata (abfd);
- symtab_hdr = &thunk->i_shdrp[thunk->symtab_section];
+ off = align_file_position (off);
+ off = assign_file_position_for_section (&t->symtab_hdr, off);
+ off = assign_file_position_for_section (&t->shstrtab_hdr, off);
+ off = assign_file_position_for_section (&t->strtab_hdr, off);
+ return off;
+}
- if (thunk->symtab_section == this_section + 1)
- rela_section = thunk->symtab_section + 2; /* symtab + symstrtab */
- else
- rela_section = this_section + 1;
- rela_hdr = &thunk->i_shdrp[rela_section];
- rela_hdr->sh_link = thunk->symtab_section;
- rela_hdr->sh_info = this_section;
+struct seg_info
+{
+ bfd_vma low, mem_size;
+ file_ptr file_size;
+ int start_pos;
+ int sh_flags;
+ struct seg_info *next;
+};
- /* orelocation has the data, reloc_count has the count... */
- if (use_rela_p)
- {
- rela_hdr->sh_type = SHT_RELA;
- rela_hdr->sh_entsize = sizeof (Elf_External_Rela);
- rela_hdr->sh_size = rela_hdr->sh_entsize * asect->reloc_count;
- outbound_relocas = (Elf_External_Rela *) bfd_alloc (abfd, rela_hdr->sh_size);
-
- for (idx = 0; idx < asect->reloc_count; idx++)
- {
- Elf_Internal_Rela dst_rela;
- Elf_External_Rela *src_rela;
- arelent *ptr;
-
- ptr = asect->orelocation[idx];
- src_rela = outbound_relocas + idx;
- if (!(abfd->flags & EXEC_P))
- dst_rela.r_offset = ptr->address - asect->vma;
- else
- dst_rela.r_offset = ptr->address;
-
- dst_rela.r_info
- = ELF32_R_INFO (elf_symbol_from_bfd_symbol (abfd, ptr->sym_ptr_ptr),
- ptr->howto->type);
-
- dst_rela.r_addend = ptr->addend;
- elf_swap_reloca_out (abfd, &dst_rela, src_rela);
- }
+static boolean
+map_program_segments (abfd)
+ bfd *abfd;
+{
+ Elf_Internal_Shdr **i_shdrpp = elf_elfsections (abfd);
+ Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
+ Elf_Internal_Shdr *i_shdrp;
+ Elf_Internal_Phdr *phdr;
+ char *done = NULL;
+ unsigned int i, n_left = 0;
+ file_ptr lowest_offset = 0;
+ struct seg_info *seg = NULL;
- rela_hdr->contents = (void *) outbound_relocas;
+ done = (char *) malloc (i_ehdrp->e_shnum);
+ if (done == NULL && i_ehdrp->e_shnum != 0)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
+ }
+ memset (done, 0, i_ehdrp->e_shnum);
+ for (i = 1; i < i_ehdrp->e_shnum; i++)
+ {
+ 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)
+ {
+ /* Well, not really, but we won't process it here. */
+ done[i] = 1;
+ continue;
}
- else
- /* REL relocations */
+ 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)
{
- rela_hdr->sh_type = SHT_REL;
- rela_hdr->sh_entsize = sizeof (Elf_External_Rel);
- rela_hdr->sh_size = rela_hdr->sh_entsize * asect->reloc_count;
- outbound_relocs = (Elf_External_Rel *)
- bfd_alloc (abfd, rela_hdr->sh_size);
-
- for (idx = 0; idx < asect->reloc_count; idx++)
- {
- Elf_Internal_Rel dst_rel;
- Elf_External_Rel *src_rel;
- arelent *ptr;
-
- ptr = asect->orelocation[idx];
- src_rel = outbound_relocs + idx;
- if (!(abfd->flags & EXEC_P))
- dst_rel.r_offset = ptr->address - asect->vma;
- else
- dst_rel.r_offset = ptr->address;
-
- dst_rel.r_info
- = ELF32_R_INFO (elf_symbol_from_bfd_symbol (abfd, ptr->sym_ptr_ptr),
- ptr->howto->type);
-
- elf_swap_reloc_out (abfd, &dst_rel, src_rel);
-
- /* Update the addend -- FIXME add 64 bit support. */
-#ifdef DEBUG
- fprintf (stderr, "Updating addend: 0x%.8lx = %d, this_section = %d\n",
- (long) ((unsigned char *) (elf_elfsections (abfd)[this_section].contents)
- + dst_rel.r_offset), ptr->addend, this_section);
-#endif
-
- bfd_put_32 (abfd, ptr->addend,
- (unsigned char *) (elf_elfsections (abfd)[this_section].contents)
- + dst_rel.r_offset);
- }
- rela_hdr->contents = (void *) outbound_relocs;
+ case SHT_PROGBITS:
+ case SHT_NOBITS:
+ break;
+ default:
+ done[i] = 1;
}
+ if (!done[i])
+ n_left++;
}
- if (asect->flags & SEC_ALLOC)
+ while (n_left)
{
- this_hdr->sh_flags |= SHF_ALLOC;
- if (asect->flags & SEC_LOAD)
+ bfd_vma lowest_vma = -1, high;
+ int low_sec = 0;
+ int mem_size;
+ int file_size = 0;
+ struct seg_info *snew;
+ struct seg_info **s_ptr;
+
+ for (i = 1; i < i_ehdrp->e_shnum; i++)
{
- /* @@ Do something with sh_type? */
+ i_shdrp = i_shdrpp[i];
+ if (!done[i] && i_shdrp->sh_addr < lowest_vma)
+ {
+ lowest_vma = i_shdrp->sh_addr;
+ low_sec = i;
+ }
}
- }
- if (!(asect->flags & SEC_READONLY))
- this_hdr->sh_flags |= SHF_WRITE;
-
- if (asect->flags & SEC_CODE)
- this_hdr->sh_flags |= SHF_EXECINSTR;
-}
-
-static void
-fix_up_strtabs (abfd, asect, obj)
- bfd *abfd;
- asection *asect;
- PTR obj;
-{
- int this_section = elf_section_from_bfd_section (abfd, asect);
- elf_sect_thunk *thunk = (elf_sect_thunk *) obj;
- Elf_Internal_Shdr *this_hdr = &thunk->i_shdrp[this_section];
-
- /* @@ Check flags! */
- if (!strncmp (asect->name, ".stab", 5)
- && strcmp ("str", asect->name + strlen (asect->name) - 3))
- {
- asection *s;
- char strtab[100]; /* @@ fixed size buffer -- eliminate */
- int stridx;
-
- strcpy (strtab, asect->name);
- strcat (strtab, "str");
-
- s = bfd_get_section_by_name (abfd, strtab);
-#if 0
- fprintf (stderr, "`%s' -> 0x%x\n", strtab, s);
-#endif
- if (s)
+ if (low_sec == 0)
+ abort ();
+ /* So now we know the lowest vma of any unassigned sections; start
+ a segment there. */
+ snew = (struct seg_info *) bfd_alloc (abfd, sizeof (struct seg_info));
+ if (!snew)
{
- Elf_Internal_Shdr *s2 = thunk->i_shdrp;
-
- for (stridx = 0; /* ?? */; s2++, stridx++)
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
+ }
+ s_ptr = &seg;
+ while (*s_ptr != (struct seg_info *) NULL)
+ s_ptr = &(*s_ptr)->next;
+ *s_ptr = snew;
+ snew->next = NULL;
+ snew->low = lowest_vma;
+ i_shdrp = i_shdrpp[low_sec];
+ snew->start_pos = i_shdrp->sh_offset;
+ snew->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;
+
+ for (i = 1; i < i_ehdrp->e_shnum; i++)
+ {
+ file_ptr f1;
+
+ if (done[i])
+ continue;
+ i_shdrp = i_shdrpp[i];
+ /* position of next byte on disk */
+ f1 = snew->start_pos + file_size;
+ if (i_shdrp->sh_type == SHT_PROGBITS)
{
- if (!strcmp (strtab, s2->sh_name + elf_shstrtab (abfd)->tab))
+ if (i_shdrp->sh_offset - f1 != i_shdrp->sh_addr - high)
+ continue;
+ if (file_size != mem_size)
break;
}
+ 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 snew */
+ 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 - snew->start_pos;
+ mem_size = i_shdrp->sh_addr + i_shdrp->sh_size - snew->low;
+ high = i_shdrp->sh_addr + i_shdrp->sh_size;
+ i = 0;
}
- else
- {
- stridx = 0;
-#if 0
- {
- asection *s2 = abfd->sections;
- fprintf (stderr, " not in:");
- while (s2)
- {
- fprintf (stderr, " %s", s2->name);
- s2 = s2->next;
- }
- fprintf (stderr, "\n");
- }
-#endif
- }
- this_hdr->sh_link = stridx;
- /* @@ Assuming 32 bits! */
- this_hdr->sh_entsize = 0xc;
+ snew->file_size = file_size;
+ snew->mem_size = mem_size;
}
-}
-
-static void
-DEFUN (elf_fake_sections, (abfd, asect, obj),
- bfd * abfd AND
- asection * asect AND
- PTR obj)
-{
- elf_sect_thunk *thunk = (elf_sect_thunk *) 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 this_section;
-
- /* check if we're making a PROGBITS section... */
- /* if ((asect->flags & SEC_ALLOC) && (asect->flags & SEC_LOAD)) */
- /* this was too strict... what *do* we want to check here? */
- if (1)
- {
- Elf_Internal_Shdr *this_hdr;
- this_section = thunk->i_ehdr->e_shnum++;
- this_hdr = &thunk->i_shdrp[this_section];
- this_hdr->sh_name =
- bfd_add_to_strtab (abfd, thunk->shstrtab, asect->name);
- /* 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 = asect->alignment_power;
- 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
- /* what *do* we put here? */
- this_hdr->sh_type = SHT_PROGBITS;
-
+ /* 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)
{
- /* Emit a strtab and symtab, and possibly a reloc section. */
- Elf_Internal_Shdr *rela_hdr;
- Elf_Internal_Shdr *symtab_hdr;
- Elf_Internal_Shdr *symstrtab_hdr;
- int rela_section;
- int symstrtab_section;
-
- /* Note that only one symtab is used, so just remember it
- for now. */
- if (!thunk->symtab_section)
- {
- thunk->symtab_section = thunk->i_ehdr->e_shnum++;
- symtab_hdr = &thunk->i_shdrp[thunk->symtab_section];
- symtab_hdr->sh_name =
- bfd_add_to_strtab (abfd, thunk->shstrtab, ".symtab");
- symtab_hdr->sh_type = SHT_SYMTAB;
- symtab_hdr->sh_entsize = sizeof (Elf_External_Sym);
-
- symstrtab_section = thunk->i_ehdr->e_shnum++;
- BFD_ASSERT (symstrtab_section == thunk->symtab_section + 1);
- symstrtab_hdr = &thunk->i_shdrp[symstrtab_section];
- symtab_hdr->sh_link = symstrtab_section;
- symstrtab_hdr->sh_name =
- bfd_add_to_strtab (abfd, thunk->shstrtab, ".strtab");
- symstrtab_hdr->sh_type = SHT_STRTAB;
-
- symtab_hdr->contents = 0;
- symstrtab_hdr->contents = 0;
- symstrtab_hdr->sh_size = 0;
- }
- else
- symtab_hdr = &thunk->i_shdrp[thunk->symtab_section];
-
- if (asect->flags & SEC_RELOC)
- {
- int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
-
- rela_section = thunk->i_ehdr->e_shnum++;
- rela_hdr = &thunk->i_shdrp[rela_section];
- rela_hdr->sh_name =
- bfd_add_2_to_strtab (abfd, thunk->shstrtab,
- use_rela_p ? ".rela" : ".rel",
- asect->name);
- rela_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
- rela_hdr->sh_link = thunk->symtab_section;
- rela_hdr->sh_info = this_section;
- rela_hdr->sh_entsize = sizeof (Elf_External_Rela);
- }
+ n_segs++;
}
- if (asect->flags & SEC_ALLOC)
- {
- this_hdr->sh_flags |= SHF_ALLOC;
- if (asect->flags & SEC_LOAD)
- {
- /* @@ Do something with sh_type? */
- }
- }
- if (!(asect->flags & SEC_READONLY))
- this_hdr->sh_flags |= SHF_WRITE;
- if (asect->flags & SEC_CODE)
- this_hdr->sh_flags |= SHF_EXECINSTR;
- }
+ i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
+ sz = sizeof (Elf_External_Phdr) * n_segs;
+ if (align_file_position (i_ehdrp->e_ehsize) + sz <= lowest_offset)
+ i_ehdrp->e_phoff = align_file_position (i_ehdrp->e_ehsize);
+ else
+ {
+ i_ehdrp->e_phoff = align_file_position (elf_tdata (abfd)->next_file_pos);
+ elf_tdata (abfd)->next_file_pos = i_ehdrp->e_phoff + sz;
+ }
+ phdr = (Elf_Internal_Phdr *) bfd_alloc (abfd,
+ n_segs * sizeof (Elf_Internal_Phdr));
+ if (!phdr)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ abort (); /* FIXME */
+ }
+ 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)
+ /* SysVr4 ELF docs say "data segments normally have read, write,
+ and execute permissions." */
+ phdr->p_flags |= (PF_W | PF_X);
+ 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);
+ if (done != NULL)
+ free (done);
+ return true;
+error_return:
+ if (done != NULL)
+ free (done);
+ return false;
}
-
-/*
-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.
-*/
-
-struct elfNAME (internal_shdr) *
-DEFUN (bfd_elf_locate_sh, (abfd, strtab, shdrp, name),
- bfd * abfd AND
- struct strtab *strtab AND
- struct elfNAME (internal_shdr) *shdrp AND
- CONST char *name)
+static boolean
+assign_file_positions_except_relocs (abfd)
+ bfd *abfd;
{
- 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;
-}
+ /* 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.
-/* Map symbol from it's internal number to the external number, moving
- all local symbols to be at the head of the list. */
+ 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.
-static INLINE int
-sym_is_global (sym)
- asymbol *sym;
-{
- if (sym->flags & BSF_GLOBAL)
- {
- if (sym->flags & BSF_LOCAL)
- abort ();
- return 1;
- }
- if (sym->section == &bfd_und_section)
- return 1;
- if (bfd_is_com_section (sym->section))
- return 1;
- if (sym->flags & (BSF_LOCAL | BSF_SECTION_SYM | BSF_FILE))
- return 0;
- return 0;
-}
+ The order, for now: <ehdr> <shdr> <sec1> <sec2> <sec3> ... <rel1> ...
+ or: <ehdr> <phdr> <sec1> <sec2> ... <shdr> <rel1> ... */
-static void
-DEFUN (elf_map_symbols, (abfd), bfd * abfd)
-{
- int symcount = bfd_get_symcount (abfd);
- asymbol **syms = bfd_get_outsymbols (abfd);
- int num_locals = 0;
- int num_globals = 0;
- int num_locals2 = 0;
- int num_globals2 = 0;
- int num_sections = 0;
- int *symtab_map;
- int idx;
- asection *asect;
+ struct elf_obj_tdata *t = elf_tdata (abfd);
+ file_ptr off;
+ unsigned 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;
+ bfd_vma maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
-#ifdef DEBUG
- fprintf (stderr, "elf_map_symbols\n");
- fflush (stderr);
-#endif
+ /* Everything starts after the ELF file header. */
+ off = i_ehdrp->e_ehsize;
- /* Add local symbols for each allocated section
- FIXME -- we should only put out symbols for sections that
- are actually relocated against. */
- for (asect = abfd->sections; asect; asect = asect->next)
+ if (!exec_p)
{
- if (asect->flags & (SEC_LOAD | SEC_DATA | SEC_CODE))
- num_sections++;
+ /* Section headers. */
+ off = align_file_position (off);
+ i_ehdrp->e_shoff = off;
+ off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
+ off = assign_file_positions_for_symtab_and_strtabs (abfd, off);
}
-
- if (num_sections)
+ for (i = 1; i < i_ehdrp->e_shnum; i++)
{
- if (syms)
- syms = (asymbol **) bfd_realloc (abfd, syms,
- ((symcount + num_sections + 1)
- * sizeof (asymbol *)));
- else
- syms = (asymbol **) bfd_alloc (abfd,
- (num_sections + 1) * sizeof (asymbol *));
+ /* The symtab and strtab sections are placed by
+ assign_file_positions_for_symtab_and_strtabs. */
+ if (i == t->symtab_section
+ || i == t->strtab_section
+ || i == t->shstrtab_section)
+ continue;
- for (asect = abfd->sections; asect; asect = asect->next)
+ 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)
{
- if (asect->flags & (SEC_LOAD | SEC_DATA | SEC_CODE))
+ 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)
+ {
+ i_shdrp->sh_offset = -1;
+ continue;
+ }
+ /* Blindly assume that the segments are ordered optimally. With
+ the default LD script, they will be. */
+ if (i_shdrp->sh_type != SHT_NOBITS)
{
- 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;
+ /* 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;
+ }
}
}
+ off = assign_file_position_for_section (i_shdrp, off);
- syms[symcount] = (asymbol *) 0;
- bfd_set_symtab (abfd, syms, symcount);
+ if (exec_p
+ && i_shdrp->sh_type == SHT_NOBITS
+ && (i == i_ehdrp->e_shnum
+ || i_shdrpp[i + 1]->sh_type != SHT_NOBITS))
+ {
+ /* Skip to the next page to ensure that when the file is
+ loaded the bss section is loaded with zeroes. I don't
+ know if this is required on all platforms, but it
+ shouldn't really hurt. */
+ off = BFD_ALIGN (off, maxpagesize);
+ }
+
+ if (exec_p
+ && (abfd->flags & D_PAGED) != 0
+ && 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)
+ {
+ elf_tdata (abfd)->next_file_pos = off;
+ if (!map_program_segments (abfd))
+ return false;
+ off = elf_tdata (abfd)->next_file_pos;
- elf_symtab_map (abfd) = symtab_map
- = (int *) bfd_alloc (abfd, symcount * sizeof (int *));
+ /* Section headers. */
+ off = align_file_position (off);
+ i_ehdrp->e_shoff = off;
+ off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
- /* Identify and classify all of the symbols. */
- for (idx = 0; idx < symcount; idx++)
- {
- if (!sym_is_global (syms[idx]))
- num_locals++;
- else
- num_globals++;
- }
+ off = assign_file_positions_for_symtab_and_strtabs (abfd, off);
- /* Now provide mapping information. Add +1 for skipping over the
- dummy symbol. */
- for (idx = 0; idx < symcount; idx++)
- {
- if (!sym_is_global (syms[idx]))
- symtab_map[idx] = 1 + num_locals2++;
- else
- symtab_map[idx] = 1 + num_locals + num_globals2++;
+ for (i = 1; i < i_ehdrp->e_shnum; i++)
+ {
+ 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_num_locals (abfd) = num_locals;
- elf_num_globals (abfd) = num_globals;
+ elf_tdata (abfd)->next_file_pos = off;
+ return true;
}
-
static boolean
-DEFUN (elf_compute_section_file_positions, (abfd), bfd * abfd)
+prep_headers (abfd)
+ bfd *abfd;
{
Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
- Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */
+ Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
+ Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
+ int count;
struct strtab *shstrtab;
- int count, maxsections;
- elf_sect_thunk est;
-
- if (!elf_shstrtab (abfd))
- {
- i_ehdrp = elf_elfheader (abfd); /* build new header in tdata memory */
- shstrtab = bfd_new_strtab (abfd);
-
- i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
- i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
- i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
- i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
-
- i_ehdrp->e_ident[EI_CLASS] = ELFCLASS32; /* FIXME: find out from bfd */
- i_ehdrp->e_ident[EI_DATA] =
- abfd->xvec->byteorder_big_p ? ELFDATA2MSB : ELFDATA2LSB;
- i_ehdrp->e_ident[EI_VERSION] = EV_CURRENT;
-
- for (count = EI_PAD; count < EI_NIDENT; count++)
- i_ehdrp->e_ident[count] = 0;
-
- i_ehdrp->e_type = (abfd->flags & EXEC_P) ? ET_EXEC : ET_REL;
- switch (bfd_get_arch (abfd))
- {
- case bfd_arch_unknown:
- i_ehdrp->e_machine = EM_NONE;
- break;
- case bfd_arch_sparc:
- i_ehdrp->e_machine = EM_SPARC;
- break;
- case bfd_arch_i386:
- i_ehdrp->e_machine = EM_386;
- break;
- case bfd_arch_m68k:
- i_ehdrp->e_machine = EM_68K;
- break;
- case bfd_arch_m88k:
- i_ehdrp->e_machine = EM_88K;
- break;
- case bfd_arch_i860:
- i_ehdrp->e_machine = EM_860;
- break;
- case bfd_arch_mips: /* MIPS Rxxxx */
- i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */
- break;
- case bfd_arch_hppa:
- i_ehdrp->e_machine = EM_HPPA;
- break;
- /* also note that EM_M32, AT&T WE32100 is unknown to bfd */
- default:
- i_ehdrp->e_machine = EM_NONE;
- }
- i_ehdrp->e_version = EV_CURRENT;
- i_ehdrp->e_ehsize = sizeof (Elf_External_Ehdr);
-
- /* no program header, for now. */
- i_ehdrp->e_phoff = 0;
- i_ehdrp->e_phentsize = 0;
- i_ehdrp->e_phnum = 0;
-
- /* each bfd section is section header entry */
- i_ehdrp->e_entry = bfd_get_start_address (abfd);
- i_ehdrp->e_shentsize = sizeof (Elf_External_Shdr);
- /* figure at most each section can have a rel, strtab, symtab */
- maxsections = 4 * bfd_count_sections (abfd) + 2;
-
- i_ehdrp->e_shoff = i_ehdrp->e_ehsize;
+ i_ehdrp = elf_elfheader (abfd);
+ i_shdrp = elf_elfsections (abfd);
- /* and we'll just have to fix up the offsets later. */
- /* outbase += i_ehdr.e_shentsize * i_ehdr.e_shnum; */
+ shstrtab = bfd_new_strtab (abfd);
+ if (!shstrtab)
+ return false;
- i_shdrp = (Elf_Internal_Shdr *)
- bfd_alloc (abfd, sizeof (*i_shdrp) * maxsections);
- if (!i_shdrp)
- {
- bfd_error = no_memory;
- return false;
- }
- for (count = 0; count < maxsections; count++)
- {
- i_shdrp[count].rawdata = 0;
- i_shdrp[count].contents = 0;
- }
+ elf_shstrtab (abfd) = shstrtab;
+ i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
+ i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
+ i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
+ i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
- i_shdrp[0].sh_name = 0;
- i_shdrp[0].sh_type = SHT_NULL;
- i_shdrp[0].sh_flags = 0;
- i_shdrp[0].sh_addr = 0;
- i_shdrp[0].sh_offset = 0;
- i_shdrp[0].sh_size = 0;
- i_shdrp[0].sh_link = SHN_UNDEF;
- i_shdrp[0].sh_info = 0;
- i_shdrp[0].sh_addralign = 0;
- i_shdrp[0].sh_entsize = 0;
+ i_ehdrp->e_ident[EI_CLASS] = ELFCLASS;
+ i_ehdrp->e_ident[EI_DATA] =
+ abfd->xvec->byteorder_big_p ? ELFDATA2MSB : ELFDATA2LSB;
+ i_ehdrp->e_ident[EI_VERSION] = EV_CURRENT;
- i_ehdrp->e_shnum = 1;
+ for (count = EI_PAD; count < EI_NIDENT; count++)
+ i_ehdrp->e_ident[count] = 0;
- elf_elfsections (abfd) = i_shdrp;
- elf_shstrtab (abfd) = shstrtab;
+ i_ehdrp->e_type = (abfd->flags & EXEC_P) ? ET_EXEC : ET_REL;
+ switch (bfd_get_arch (abfd))
+ {
+ case bfd_arch_unknown:
+ i_ehdrp->e_machine = EM_NONE;
+ break;
+ case bfd_arch_sparc:
+ i_ehdrp->e_machine = EM_SPARC;
+ /* start-sanitize-v9 */
+#if ARCH_SIZE == 64
+ i_ehdrp->e_machine = EM_SPARC64;
+#endif
+ /* end-sanitize-v9 */
+ break;
+ case bfd_arch_i386:
+ i_ehdrp->e_machine = EM_386;
+ break;
+ case bfd_arch_m68k:
+ i_ehdrp->e_machine = EM_68K;
+ break;
+ case bfd_arch_m88k:
+ i_ehdrp->e_machine = EM_88K;
+ break;
+ case bfd_arch_i860:
+ i_ehdrp->e_machine = EM_860;
+ break;
+ case bfd_arch_mips: /* MIPS Rxxxx */
+ i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */
+ break;
+ case bfd_arch_hppa:
+ i_ehdrp->e_machine = EM_HPPA;
+ 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:
+ i_ehdrp->e_machine = EM_NONE;
}
- est.i_ehdr = elf_elfheader (abfd);
- est.i_shdrp = elf_elfsections (abfd);
- est.shstrtab = elf_shstrtab (abfd);
- est.symtab_section = 0; /* elf_fake_sections fills it in */
+ i_ehdrp->e_version = EV_CURRENT;
+ i_ehdrp->e_ehsize = sizeof (Elf_External_Ehdr);
- elf_map_symbols (abfd);
- bfd_map_over_sections (abfd, elf_fake_sections, &est);
- {
- asection *secp;
- asection *psecp = (asection *) 0;
- int idx;
- Elf_Internal_Shdr *shp;
+ /* no program header, for now. */
+ i_ehdrp->e_phoff = 0;
+ i_ehdrp->e_phentsize = 0;
+ i_ehdrp->e_phnum = 0;
- for (idx = 0, secp = abfd->sections; secp; idx++, secp = secp->next)
- {
- if (psecp == (asection *) 0)
- {
- secp->filepos = est.i_ehdr->e_shoff + (est.i_ehdr->e_shnum + 1) * sizeof (Elf_External_Shdr);
- }
- else
- {
- secp->filepos = psecp->filepos + psecp->_cooked_size;
- }
- shp = bfd_elf_locate_sh (abfd, est.shstrtab, est.i_shdrp, secp->name);
- if (shp)
- shp->sh_offset = secp->filepos;
- psecp = secp;
- }
- }
- elf_onesymtab (abfd) = est.symtab_section;
- return true;
-}
+ /* each bfd section is section header entry */
+ i_ehdrp->e_entry = bfd_get_start_address (abfd);
+ i_ehdrp->e_shentsize = sizeof (Elf_External_Shdr);
-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_ehsize;
- int i;
- Elf_External_Phdr x_phdr;
+ /* if we're building an executable, we'll need a program header table */
+ if (abfd->flags & EXEC_P)
+ {
+ /* it all happens later */
+#if 0
+ i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
- for (i = 0; i < phdr_cnt; i++)
+ /* elf_build_phdrs() returns a (NULL-terminated) array of
+ Elf_Internal_Phdrs */
+ i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum);
+ i_ehdrp->e_phoff = outbase;
+ outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum;
+#endif
+ }
+ else
{
- 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);
+ i_ehdrp->e_phentsize = 0;
+ i_phdrp = 0;
+ i_ehdrp->e_phoff = 0;
}
+ elf_tdata (abfd)->symtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab,
+ ".symtab");
+ elf_tdata (abfd)->strtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab,
+ ".strtab");
+ elf_tdata (abfd)->shstrtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab,
+ ".shstrtab");
return true;
}
-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)
+static boolean
+swap_out_syms (abfd)
+ bfd *abfd;
{
- 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 */
+ if (!elf_map_symbols (abfd))
+ return false;
- {
- 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. */
-
- bzero ((char *) (phdr_buf + idx), sizeof (Elf_Internal_Phdr));
- idx++;
-
- BFD_ASSERT (idx - 1 == *phdr_cnt);
-
- return phdr_buf;
-}
-
-boolean
-DEFUN (elf_write_object_contents, (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_Shdr *i_shdrp; /* Section header table, internal form */
- asection *nsect;
- elf_sect_thunk est;
-
- int outbase = 0;
- int count;
- int scnt;
- struct strtab *shstrtab;
-
- if (abfd->output_has_begun == false)
- {
- elf_compute_section_file_positions (abfd);
- abfd->output_has_begun = true;
- }
-
- i_ehdrp = elf_elfheader (abfd);
- i_shdrp = elf_elfsections (abfd);
- shstrtab = elf_shstrtab (abfd);
-
- est.i_ehdr = i_ehdrp;
- est.i_shdrp = i_shdrp;
- est.shstrtab = shstrtab;
- est.symtab_section = elf_onesymtab (abfd); /* filled in by elf_fake */
-
- bfd_map_over_sections (abfd, elf_make_sections, &est);
- bfd_map_over_sections (abfd, fix_up_strtabs, &est);
-
- /* Dump out the symtabs. */
+ /* Dump out the symtabs. */
{
int symcount = bfd_get_symcount (abfd);
asymbol **syms = bfd_get_outsymbols (abfd);
struct strtab *stt = bfd_new_strtab (abfd);
Elf_Internal_Shdr *symtab_hdr;
Elf_Internal_Shdr *symstrtab_hdr;
- int symstrtab_section;
Elf_External_Sym *outbound_syms;
int idx;
- symtab_hdr = &i_shdrp[est.symtab_section];
+ 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_section = est.symtab_section + 1;
- symstrtab_hdr = &i_shdrp[symstrtab_section];
- symtab_hdr->sh_link = symstrtab_section;
+ 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. */
Elf_Internal_Sym sym;
bfd_vma value = syms[idx]->value;
- sym.st_name = bfd_add_to_strtab (abfd, stt, syms[idx]->name);
+ if (syms[idx]->flags & BSF_SECTION_SYM)
+ /* Section symbols have no names. */
+ sym.st_name = 0;
+ else
+ sym.st_name = bfd_add_to_strtab (abfd, stt, syms[idx]->name);
- value += syms[idx]->section->output_section->vma
- + syms[idx]->section->output_offset;
- sym.st_value = value;
+ if (bfd_is_com_section (syms[idx]->section))
+ {
+ /* ELF common symbols put the alignment into the `value' field,
+ and the size into the `size' field. This is backwards from
+ how BFD handles it, so reverse it here. */
+ sym.st_size = value;
+ /* Should retrieve this from somewhere... */
+ sym.st_value = 16;
+ 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;
- sym.st_size = (Elf32_Word) (elf_symbol_from (abfd, syms[idx]))->internal_elf_sym.st_size;
+ if (sec->output_section)
+ {
+ value += sec->output_offset;
+ sec = sec->output_section;
+ }
+ value += sec->vma;
+ sym.st_value = value;
+ 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)
+ {
+ asection *sec2;
+ /* Writing this would be a hell of a lot easier if we had
+ some decent documentation on bfd, and knew what to expect
+ of the library, and what to demand of applications. For
+ example, it appears that `objcopy' might not set the
+ section of a symbol to be a section that is actually in
+ the output file. */
+ sec2 = bfd_get_section_by_name (abfd, sec->name);
+ BFD_ASSERT (sec2 != 0);
+ sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec2);
+ BFD_ASSERT (shndx != -1);
+ }
+ }
- if (syms[idx]->section == &bfd_und_section
- || bfd_is_com_section (syms[idx]->section))
+ if (bfd_is_com_section (syms[idx]->section))
+ 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))
- {
- 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)
+ else
{
- 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;
- if (syms[idx]->section)
- sym.st_shndx =
- elf_section_from_bfd_section (abfd,
- syms[idx]->section->output_section);
- else
- sym.st_shndx = SHN_UNDEF;
-
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 = (void *) outbound_syms;
- symstrtab_hdr->contents = (void *) stt->tab;
+ symtab_hdr->contents = (PTR) outbound_syms;
+ symstrtab_hdr->contents = (PTR) stt->tab;
symstrtab_hdr->sh_size = stt->length;
symstrtab_hdr->sh_type = SHT_STRTAB;
+
+ symstrtab_hdr->sh_flags = 0;
+ symstrtab_hdr->sh_addr = 0;
+ symstrtab_hdr->sh_entsize = 0;
+ symstrtab_hdr->sh_link = 0;
+ symstrtab_hdr->sh_info = 0;
+ symstrtab_hdr->sh_addralign = 1;
+ symstrtab_hdr->size = 0;
}
/* put the strtab out too... */
{
Elf_Internal_Shdr *this_hdr;
- int this_section;
- this_section = i_ehdrp->e_shnum++;
- i_ehdrp->e_shstrndx = this_section;
- this_hdr = &i_shdrp[this_section];
- this_hdr->sh_name = bfd_add_to_strtab (abfd, shstrtab, ".shstrtab");
+ 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_size = shstrtab->length;
- this_hdr->contents = (void *) shstrtab->tab;
+ this_hdr->sh_flags = 0;
+ this_hdr->sh_addr = 0;
+ this_hdr->sh_entsize = 0;
+ this_hdr->sh_addralign = 1;
+ this_hdr->size = 0;
}
+ return true;
+}
- outbase = i_ehdrp->e_ehsize;
-
- /* if we're building an executable, we'll need a program header table */
- if (abfd->flags & EXEC_P)
- {
- i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
+static boolean
+write_shdrs_and_ehdr (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_shdrp; /* Section header table, external form */
+ Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
+ unsigned int count;
+ struct strtab *shstrtab;
- /* elf_build_phdrs() returns a (NULL-terminated) array of
- Elf_Internal_Phdrs */
- i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum);
- i_ehdrp->e_phoff = i_ehdrp->e_ehsize;
- i_ehdrp->e_shoff = i_ehdrp->e_phoff + (i_ehdrp->e_phentsize
- * i_ehdrp->e_phnum);
- }
+ i_ehdrp = elf_elfheader (abfd);
+ i_shdrp = elf_elfsections (abfd);
+ shstrtab = elf_shstrtab (abfd);
/* swap the header before spitting it out... */
- 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 0
- outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum;
- outbase += i_ehdrp->e_shentsize * i_ehdrp->e_shnum;
+#if DEBUG & 1
+ elf_debug_file (i_ehdrp);
#endif
- /* find the next available location in the file
- (just beyond the sections that have already been written). */
- outbase = 0;
- for (count = 1; count < i_ehdrp->e_shnum; count++)
+ elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr);
+ 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)
{
- if (i_shdrp[count].sh_offset && outbase < i_shdrp[count].sh_offset)
- outbase = i_shdrp[count].sh_offset + i_shdrp[count].sh_size;
+ bfd_set_error (bfd_error_no_memory);
+ return false;
}
- /* now we fix up the offsets... */
- for (count = 1; count < i_ehdrp->e_shnum; count++)
+ for (count = 0; count < i_ehdrp->e_shnum; count++)
{
- if (i_shdrp[count].sh_offset == 0)
- i_shdrp[count].sh_offset = outbase;
- outbase += i_shdrp[count].sh_size;
+#if DEBUG & 2
+ elf_debug_section (shstrtab->tab + i_shdrp[count]->sh_name, count,
+ i_shdrp[count]);
+#endif
+ elf_swap_shdr_out (abfd, i_shdrp[count], x_shdrp + count);
}
+ 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;
- /* If we're building an executable, fixup the program header table
- offsets.
+ /* need to dump the string table too... */
- @@ For now, assume that the entries are in a fixed order: text,
- data, bss. FIXME */
+ return true;
+}
- if (abfd->flags & EXEC_P)
+static void
+assign_file_positions_for_relocs (abfd)
+ bfd *abfd;
+{
+ file_ptr off = elf_tdata (abfd)->next_file_pos;
+ unsigned int i;
+ Elf_Internal_Shdr **shdrpp = elf_elfsections (abfd);
+ Elf_Internal_Shdr *shdrp;
+ for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++)
{
- static char *CONST section_name[] =
- {".text", ".data", ".bss"};
-
- for (count = 0; count < 3; count++)
- {
- asection *asect = bfd_get_section_by_name (abfd, section_name[count]);
- int sh_idx = elf_section_from_bfd_section (abfd, asect);
-
- i_phdrp[count].p_offset = i_shdrp[sh_idx].sh_offset;
- }
-
- /* write out the program header table entries */
- elf_write_phdrs (abfd, i_ehdrp, i_phdrp, i_ehdrp->e_phnum);
+ shdrp = shdrpp[i];
+ if (shdrp->sh_type != SHT_REL && shdrp->sh_type != SHT_RELA)
+ continue;
+ off = align_file_position (off);
+ off = assign_file_position_for_section (shdrp, off);
}
+ elf_tdata (abfd)->next_file_pos = off;
+}
- /* 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)
+boolean
+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;
+ unsigned int count;
+
+ /* 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)
{
- bfd_error = no_memory;
+ fprintf (stderr, "Writing ELF dynamic objects is not supported\n");
+ bfd_set_error (bfd_error_wrong_format);
return false;
}
- for (count = 0, scnt = 0; count < i_ehdrp->e_shnum; count++)
+ if (abfd->output_has_begun == false)
{
- elf_swap_shdr_out (abfd, i_shdrp + count, x_shdrp + scnt);
- scnt++;
+ /* Do any elf backend specific processing first. */
+ if (bed->elf_backend_begin_write_processing)
+ (*bed->elf_backend_begin_write_processing) (abfd);
+
+ if (prep_headers (abfd) == false)
+ return false;
+ if (elf_compute_section_file_positions (abfd) == false)
+ return false;
+ abfd->output_has_begun = true;
}
- bfd_write ((PTR) x_shdrp, sizeof (*x_shdrp), i_ehdrp->e_shnum, abfd);
- /* need to dump the string table too... */
- /* after writing the headers, we need to write the sections too... */
- nsect = abfd->sections;
- for (count = 0; count < i_ehdrp->e_shnum; count++)
+ i_shdrp = elf_elfsections (abfd);
+ i_ehdrp = elf_elfheader (abfd);
+
+ bfd_map_over_sections (abfd, write_relocs, (PTR) 0);
+ assign_file_positions_for_relocs (abfd);
+
+ /* After writing the headers, we need to write the sections too... */
+ for (count = 1; count < i_ehdrp->e_shnum; count++)
{
- if (i_shdrp[count].contents)
+ if (bed->elf_backend_section_processing)
+ (*bed->elf_backend_section_processing) (abfd, i_shdrp[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);
+ 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;
}
}
- return true;
+ if (bed->elf_backend_final_write_processing)
+ (*bed->elf_backend_final_write_processing) (abfd);
+
+ return write_shdrs_and_ehdr (abfd);
}
/* Given an index of a section, retrieve a pointer to it. Note
doesn't have anything like a tdata field... */
static struct sec *
-DEFUN (section_from_elf_index, (abfd, index),
- bfd * abfd AND
- int index)
+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? */
if (index == SHN_COMMON)
return &bfd_com_section;
+ if (index > elf_elfheader (abfd)->e_shnum)
+ return 0;
+
{
- Elf_Internal_Shdr *i_shdrp = elf_elfsections (abfd);
- Elf_Internal_Shdr *hdr = i_shdrp + index;
+ Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[index];
switch (hdr->sh_type)
{
/* 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);
+ Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
int index;
Elf_Internal_Shdr *hdr;
int maxindex = elf_elfheader (abfd)->e_shnum;
return SHN_ABS;
if (asect == &bfd_com_section)
return SHN_COMMON;
+ if (asect == &bfd_und_section)
+ return SHN_UNDEF;
for (index = 0; index < maxindex; index++)
{
- hdr = &i_shdrp[index];
+ hdr = i_shdrp[index];
switch (hdr->sh_type)
{
/* ELF sections that map to BFD sections */
case SHT_PROGBITS:
case SHT_NOBITS:
+ case SHT_NOTE:
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;
}
}
- return 0;
+ return -1;
}
/* 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);
+ flagword flags = asym_ptr->flags;
- /* FIXME -- there has to be a better way than linear search. */
- for (idx = 0; idx < symcount; idx++)
+ /* 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))
- 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;
}
- BFD_ASSERT (idx < symcount);
- idx = elf_symtab_map (abfd)[idx];
+ if (asym_ptr->udata)
+ idx = ((Elf_Sym_Extra *) asym_ptr->udata)->elf_sym_num;
+ else
+ {
+ abort ();
+ }
-#ifdef DEBUG
+#if DEBUG & 4
{
- flagword flags = asym_ptr->flags;
fprintf (stderr,
- "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags =",
- (long) asym_ptr, asym_ptr->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_IMPORT)
- fprintf (stderr, " import");
-
- if (flags & BSF_EXPORT)
- fprintf (stderr, " export");
-
- if (flags & BSF_UNDEFINED_OBS)
- fprintf (stderr, " undefined_obs");
-
- if (flags & BSF_FORT_COMM_OBS)
- fprintf (stderr, " fort_comm_obs");
-
- 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_CTOR)
- fprintf (stderr, " ctor");
-
- 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");
-
- putc ('\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 *i_shdrp = elf_elfsections (abfd);
- Elf_Internal_Shdr *hdr = i_shdrp + elf_onesymtab (abfd);
- 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;
+ long i;
- sym->symbol.name = elf_string_from_elf_section (abfd, hdr->sh_link,
- i_sym.st_name);
+ if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1)
+ return -1;
- sym->symbol.value = i_sym.st_value;
-#if 0
- /* FIXME -- this is almost certainly bogus. It's from Pace
- Willisson's hasty Solaris support, to pass the sizes of
- object files or functions down into GDB via the back door, to
- circumvent some other kludge in how Sun hacked stabs. --
- gnu@cygnus.com */
- /* XXX Size is now stored via a pointer in an elf_symbol_type;
- should fix gdb then turn this off. */
- sym->symbol.udata = (PTR) i_sym.st_size;
- /* FIXME -- end of bogosity. */
-#endif
- if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERV)
- {
- sym->symbol.section = section_from_elf_index (abfd, i_sym.st_shndx);
- }
- else if (i_sym.st_shndx == SHN_ABS)
+ symbase = ((elf_symbol_type *)
+ bfd_zalloc (abfd, symcount * sizeof (elf_symbol_type)));
+ if (symbase == (elf_symbol_type *) NULL)
{
- sym->symbol.section = &bfd_abs_section;
+ bfd_set_error (bfd_error_no_memory);
+ return -1;
}
- 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;
+ 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;
- }
- /* 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;
+ if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERV)
+ {
+ sym->symbol.section = section_from_elf_index (abfd,
+ i_sym.st_shndx);
+ }
+ 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;
- be_data->global_sym = sym;
- }
- sym++;
- }
+ sym->symbol.value -= sym->symbol.section->vma;
- /* We rely on the zalloc to clear out the final symbol entry. */
+ 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;
+ }
- obj_raw_syms (abfd) = x_symp;
+ 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;
+ }
- bfd_get_symcount (abfd) = symcount = sym - symbase;
+ 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);
+ }
+
+ sym++;
+ }
+ }
+
+ /* 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);
+ }
+
+ /* We rely on the zalloc to clear out the final symbol entry. */
+
+ 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;
{
- unsigned int symcount;
- unsigned int symtab_size = 0;
- Elf_Internal_Shdr *i_shdrp;
- Elf_Internal_Shdr *hdr;
+ 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;
+{
+ long symcount;
+ long symtab_size;
+ Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
+
+ symcount = hdr->sh_size / sizeof (Elf_External_Sym);
+ symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
- i_shdrp = elf_elfsections (abfd);
- if (i_shdrp != NULL)
- {
- hdr = i_shdrp + elf_onesymtab (abfd);
- symcount = hdr->sh_size / sizeof (Elf_External_Sym);
- 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 asect->_raw_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 + ELF32_R_SYM (dst.r_info) - 1;
+
+ /* 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 */
Elf_Internal_Shdr *hdr;
{
fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num, str, (long) hdr);
- fprintf (stderr, "sh_name = %ld\n", (long) hdr->sh_name);
- fprintf (stderr, "sh_type = %ld\n", (long) hdr->sh_type);
- fprintf (stderr, "sh_flags = %ld\n", (long) hdr->sh_flags);
- fprintf (stderr, "sh_addr = %ld\n", (long) hdr->sh_addr);
- fprintf (stderr, "sh_offset = %ld\n", (long) hdr->sh_offset);
- fprintf (stderr, "sh_size = %ld\n", (long) hdr->sh_size);
- fprintf (stderr, "sh_link = %ld\n", (long) hdr->sh_link);
- fprintf (stderr, "sh_info = %ld\n", (long) hdr->sh_info);
- fprintf (stderr, "sh_addralign = %ld\n", (long) hdr->sh_addralign);
- fprintf (stderr, "sh_entsize = %ld\n", (long) hdr->sh_entsize);
+ fprintf (stderr,
+ "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n",
+ (long) hdr->sh_name,
+ (long) hdr->sh_type,
+ (long) hdr->sh_flags);
+ fprintf (stderr,
+ "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n",
+ (long) hdr->sh_addr,
+ (long) hdr->sh_offset,
+ (long) hdr->sh_size);
+ fprintf (stderr,
+ "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n",
+ (long) hdr->sh_link,
+ (long) hdr->sh_info,
+ (long) hdr->sh_addralign);
+ fprintf (stderr, "sh_entsize = %ld\n",
+ (long) hdr->sh_entsize);
fprintf (stderr, "rawdata = 0x%.8lx\n", (long) hdr->rawdata);
fprintf (stderr, "contents = 0x%.8lx\n", (long) hdr->contents);
fprintf (stderr, "size = %ld\n", (long) hdr->size);
fflush (stderr);
}
+static void
+elf_debug_file (ehdrp)
+ Elf_Internal_Ehdr *ehdrp;
+{
+ fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry);
+ fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff);
+ fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum);
+ fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize);
+ fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff);
+ fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum);
+ fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize);
+}
#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 *i_shdrp;
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. */
- i_shdrp = elf_elfsections (abfd);
- data_hdr = i_shdrp + elf_section_from_bfd_section (abfd, asect);
+ data_hdr = &elf_section_data (asect)->this_hdr;
data_off = data_hdr->sh_offset;
data_max = data_hdr->sh_size - sizeof (buf) + 1;
-#ifdef DEBUG
- elf_debug_section ("data section", data_hdr - i_shdrp, data_hdr);
+#if DEBUG & 2
+ elf_debug_section ("data section", -1, data_hdr);
#endif
for (idx = 0; idx < asect->reloc_count; idx++)
/* 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 + ELF32_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)
+elf_set_arch_mach (abfd, arch, machine)
+ bfd *abfd;
+ enum bfd_architecture arch;
+ unsigned long machine;
{
/* Allow any architecture to be supported by the elf backend */
switch (arch)
case bfd_arch_i860: /* EM_860 */
case bfd_arch_mips: /* EM_MIPS (MIPS R3000) */
case bfd_arch_hppa: /* EM_HPPA (HP PA_RISC) */
+ case bfd_arch_powerpc: /* EM_CYGNUS_POWERPC */
return bfd_default_set_arch_mach (abfd, arch, machine);
default:
return false;
}
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)
-{
- fprintf (stderr, "elf_find_nearest_line unimplemented\n");
- fflush (stderr);
- BFD_FAIL ();
+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);
}
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;
{
- int dest_sect;
+ Elf_Internal_Shdr *hdr;
if (abfd->output_has_begun == false) /* set by bfd.c handler? */
{
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+
+ /* Do any elf backend specific processing first. */
+ if (bed->elf_backend_begin_write_processing)
+ (*bed->elf_backend_begin_write_processing) (abfd);
+
/* do setup calculations (FIXME) */
- elf_compute_section_file_positions (abfd);
+ if (prep_headers (abfd) == false)
+ return false;
+ if (elf_compute_section_file_positions (abfd) == false)
+ return false;
abfd->output_has_begun = true;
}
- dest_sect = elf_section_from_bfd_section (abfd, section);
- if (!dest_sect)
- return false;
+ hdr = &elf_section_data (section)->this_hdr;
- if (bfd_seek (abfd, elf_elfsections (abfd)[dest_sect].sh_offset + offset, SEEK_SET) == -1)
+ if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1)
return false;
if (bfd_write (location, 1, count, abfd) != count)
return false;
+
return true;
}
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 */
+#endif
+
+#ifdef HAVE_PROCFS
+
+static void
+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");
+ newsect->_raw_size = sizeof (status->pr_reg);
+ newsect->filepos = filepos + (long) &status->pr_reg;
+ newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS;
+ newsect->alignment_power = 2;
+ if ((core_prstatus (abfd) = bfd_alloc (abfd, descsz)) != NULL)
+ {
+ memcpy (core_prstatus (abfd), descdata, descsz);
+ }
+ }
+}
+
+/* Stash a copy of the prpsinfo structure away for future use. */
+
+static void
+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)
+ {
+ memcpy (core_prpsinfo (abfd), descdata, descsz);
+ }
+ }
+}
+
+static void
+bfd_fpregset (abfd, descdata, descsz, filepos)
+ bfd *abfd;
+ char *descdata;
+ int descsz;
+ long filepos;
+{
+ asection *newsect;
+
+ newsect = bfd_make_section (abfd, ".reg2");
+ newsect->_raw_size = descsz;
+ newsect->filepos = filepos;
+ newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS;
+ newsect->alignment_power = 2;
+}
+
+#endif /* HAVE_PROCFS */
+
+/* Return a pointer to the args (including the command name) that were
+ seen by the program that generated the core dump. Note that for
+ some reason, a spurious space is tacked onto the end of the args
+ in some (at least one anyway) implementations, so strip it off if
+ it exists. */
+
+char *
+elf_core_file_failing_command (abfd)
+ bfd *abfd;
+{
+#ifdef HAVE_PROCFS
+ if (core_prpsinfo (abfd))
+ {
+ prpsinfo_t *p = core_prpsinfo (abfd);
+ char *scan = p->pr_psargs;
+ while (*scan++)
+ {;
+ }
+ scan -= 2;
+ if ((scan > p->pr_psargs) && (*scan == ' '))
+ {
+ *scan = '\000';
+ }
+ return p->pr_psargs;
+ }
+#endif
+ return NULL;
+}
+
+/* Return the number of the signal that caused the core dump. Presumably,
+ since we have a core file, we got a signal of some kind, so don't bother
+ checking the other process status fields, just return the signal number.
+ */
+
+int
+elf_core_file_failing_signal (abfd)
+ bfd *abfd;
+{
+#ifdef HAVE_PROCFS
+ if (core_prstatus (abfd))
+ {
+ return ((prstatus_t *) (core_prstatus (abfd)))->pr_cursig;
+ }
+#endif
+ return -1;
+}
+
+/* Check to see if the core file could reasonably be expected to have
+ come for the current executable file. Note that by default we return
+ true unless we find something that indicates that there might be a
+ problem.
+ */
boolean
-DEFUN (elf_get_sect_thunk, (abfd, est),
- bfd * abfd AND
- elf_sect_thunk * est)
+elf_core_file_matches_executable_p (core_bfd, exec_bfd)
+ bfd *core_bfd;
+ bfd *exec_bfd;
{
- if (est == (elf_sect_thunk *) NULL)
- return false;
+#ifdef HAVE_PROCFS
+ char *corename;
+ char *execname;
+#endif
+
+ /* First, xvecs must match since both are ELF files for the same target. */
+
+ if (core_bfd->xvec != exec_bfd->xvec)
+ {
+ bfd_set_error (bfd_error_system_call);
+ return false;
+ }
+
+#ifdef HAVE_PROCFS
+
+ /* If no prpsinfo, just return true. Otherwise, grab the last component
+ of the exec'd pathname from the prpsinfo. */
+
+ if (core_prpsinfo (core_bfd))
+ {
+ corename = (((struct prpsinfo *) core_prpsinfo (core_bfd))->pr_fname);
+ }
+ else
+ {
+ return true;
+ }
+
+ /* Find the last component of the executable pathname. */
+
+ if ((execname = strrchr (exec_bfd->filename, '/')) != NULL)
+ {
+ execname++;
+ }
+ else
+ {
+ execname = (char *) exec_bfd->filename;
+ }
+
+ /* See if they match */
+
+ return strcmp (execname, corename) ? false : true;
+
+#else
+
+ return true;
- est->i_ehdr = elf_elfheader (abfd);
- est->i_shdrp = elf_elfsections (abfd);
- est->shstrtab = elf_shstrtab (abfd);
- est->symtab_section = elf_onesymtab (abfd); /* filled in by elf_fake */
+#endif /* HAVE_PROCFS */
+}
+
+/* ELF core files contain a segment of type PT_NOTE, that holds much of
+ the information that would normally be available from the /proc interface
+ for the process, at the time the process dumped core. Currently this
+ includes copies of the prstatus, prpsinfo, and fpregset structures.
+
+ Since these structures are potentially machine dependent in size and
+ ordering, bfd provides two levels of support for them. The first level,
+ available on all machines since it does not require that the host
+ have /proc support or the relevant include files, is to create a bfd
+ section for each of the prstatus, prpsinfo, and fpregset structures,
+ without any interpretation of their contents. With just this support,
+ the bfd client will have to interpret the structures itself. Even with
+ /proc support, it might want these full structures for it's own reasons.
+ In the second level of support, where HAVE_PROCFS is defined, bfd will
+ pick apart the structures to gather some additional information that
+ clients may want, such as the general register set, the name of the
+ exec'ed file and its arguments, the signal (if any) that caused the
+ core dump, etc.
+
+ */
+
+static boolean
+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 */
+ char *buf = NULL; /* Entire note segment contents */
+ char *namedata; /* Name portion of the note */
+ char *descdata; /* Descriptor portion of the note */
+ char *sectname; /* Name to use for new section */
+ long filepos; /* File offset to descriptor data */
+ asection *newsect;
+
+ if (hdr->p_filesz > 0
+ && (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)
+ {
+ x_note_p = (Elf_External_Note *) buf;
+ while ((char *) x_note_p < (buf + hdr->p_filesz))
+ {
+ i_note.namesz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->namesz);
+ i_note.descsz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->descsz);
+ i_note.type = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->type);
+ namedata = x_note_p->name;
+ descdata = namedata + BFD_ALIGN (i_note.namesz, 4);
+ filepos = hdr->p_offset + (descdata - buf);
+ switch (i_note.type)
+ {
+ case NT_PRSTATUS:
+ /* process descdata as prstatus info */
+ bfd_prstatus (abfd, descdata, i_note.descsz, filepos);
+ sectname = ".prstatus";
+ break;
+ case NT_FPREGSET:
+ /* process descdata as fpregset info */
+ bfd_fpregset (abfd, descdata, i_note.descsz, filepos);
+ sectname = ".fpregset";
+ break;
+ case NT_PRPSINFO:
+ /* process descdata as prpsinfo */
+ bfd_prpsinfo (abfd, descdata, i_note.descsz, filepos);
+ sectname = ".prpsinfo";
+ break;
+ default:
+ /* Unknown descriptor, just ignore it. */
+ sectname = NULL;
+ break;
+ }
+ if (sectname != NULL)
+ {
+ newsect = bfd_make_section (abfd, sectname);
+ newsect->_raw_size = i_note.descsz;
+ newsect->filepos = filepos;
+ newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS;
+ newsect->alignment_power = 2;
+ }
+ x_note_p = (Elf_External_Note *)
+ (descdata + BFD_ALIGN (i_note.descsz, 4));
+ }
+ }
+ if (buf != NULL)
+ {
+ free (buf);
+ }
+ else if (hdr->p_filesz > 0)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
return true;
+
+}
+
+/* Core files are simply standard ELF formatted files that partition
+ the file using the execution view of the file (program header table)
+ rather than the linking view. In fact, there is no section header
+ table in a core file.
+
+ The process status information (including the contents of the general
+ register set) and the floating point register set are stored in a
+ segment of type PT_NOTE. We handcraft a couple of extra bfd sections
+ that allow standard bfd access to the general registers (.reg) and the
+ floating point registers (.reg2).
+
+ */
+
+bfd_target *
+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))
+ {
+ if (bfd_get_error () != bfd_error_system_call)
+ bfd_set_error (bfd_error_wrong_format);
+ return NULL;
+ }
+
+ /* Now check to see if we have a valid ELF file, and one that BFD can
+ make use of. The magic number must match, the address size ('class')
+ and byte-swapping must match our XVEC entry, and it must have a
+ program header table (FIXME: See comments re segments at top of this
+ file). */
+
+ if (elf_file_p (&x_ehdr) == false)
+ {
+ wrong:
+ bfd_set_error (bfd_error_wrong_format);
+ return NULL;
+ }
+
+ /* FIXME, Check EI_VERSION here ! */
+
+ {
+#if ARCH_SIZE == 32
+ int desired_address_size = ELFCLASS32;
+#endif
+#if ARCH_SIZE == 64
+ int desired_address_size = ELFCLASS64;
+#endif
+
+ if (x_ehdr.e_ident[EI_CLASS] != desired_address_size)
+ goto wrong;
+ }
+
+ /* Switch xvec to match the specified byte order. */
+ switch (x_ehdr.e_ident[EI_DATA])
+ {
+ case ELFDATA2MSB: /* Big-endian */
+ if (abfd->xvec->byteorder_big_p == false)
+ goto wrong;
+ break;
+ case ELFDATA2LSB: /* Little-endian */
+ if (abfd->xvec->byteorder_big_p == true)
+ goto wrong;
+ break;
+ case ELFDATANONE: /* No data encoding specified */
+ default: /* Unknown data encoding specified */
+ goto wrong;
+ }
+
+ /* Allocate an instance of the elf_obj_tdata structure and hook it up to
+ the tdata pointer in the bfd. */
+
+ elf_tdata (abfd) =
+ (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
+ if (elf_tdata (abfd) == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return NULL;
+ }
+
+ /* FIXME, `wrong' returns from this point onward, leak memory. */
+
+ /* Now that we know the byte order, swap in the rest of the header */
+ i_ehdrp = elf_elfheader (abfd);
+ elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp);
+#if DEBUG & 1
+ 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)
+ goto wrong;
+
+ /* Allocate space for a copy of the program header table in
+ internal form, seek to the program 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 program
+ header table entry actually matches the size recorded in the file. */
+
+ if (i_ehdrp->e_phentsize != sizeof (x_phdr))
+ goto wrong;
+ i_phdrp = (Elf_Internal_Phdr *)
+ bfd_alloc (abfd, sizeof (*i_phdrp) * i_ehdrp->e_phnum);
+ if (!i_phdrp)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return NULL;
+ }
+ if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1)
+ 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))
+ return NULL;
+ elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex);
+ }
+
+ /* Once all of the program headers have been read and converted, we
+ can start processing them. */
+
+ for (phindex = 0; phindex < i_ehdrp->e_phnum; 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);
+ }
+ }
+
+ /* Remember the entry point specified in the ELF file header. */
+
+ bfd_get_start_address (abfd) = i_ehdrp->e_entry;
+
+ return abfd->xvec;
}
projects / binutils-gdb.git / blobdiff