--- /dev/null
+/* ELF executable support for BFD.
+ Copyright 1991, 1992, 1993 Free Software Foundation, Inc.
+
+ Written by Fred Fish @ Cygnus Support, from information published
+ in "UNIX System V Release 4, Programmers Guide: ANSI C and
+ Programming Support Tools". Sufficient support for gdb.
+
+ Rewritten by Mark Eichin @ Cygnus Support, from information
+ published in "System V Application Binary Interface", chapters 4
+ and 5, as well as the various "Processor Supplement" documents
+ derived from it. Added support for assembler and other object file
+ utilities.
+
+This file is part of BFD, the Binary File Descriptor library.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+
+ /****************************************
+
+ WARNING
+
+ This is only a partial ELF implementation,
+ incorporating only those parts that are
+ required to get gdb up and running. It is
+ expected that it will be expanded to a full
+ ELF implementation at some future date.
+
+ Unimplemented stubs call abort() to ensure
+ that they get proper attention if they are
+ ever called. The stubs are here since
+ this version was hacked from the COFF
+ version, and thus they will probably
+ go away or get expanded appropriately in a
+ future version.
+
+ fnf@cygnus.com
+
+ *****************************************/
+
+
+/* Problems and other issues to resolve.
+
+ (1) BFD expects there to be some fixed number of "sections" in
+ the object file. I.E. there is a "section_count" variable in the
+ bfd structure which contains the number of sections. However, ELF
+ supports multiple "views" of a file. In particular, with current
+ implementations, executable files typically have two tables, a
+ program header table and a section header table, both of which
+ partition the executable.
+
+ In ELF-speak, the "linking view" of the file uses the section header
+ table to access "sections" within the file, and the "execution view"
+ uses the program header table to access "segments" within the file.
+ "Segments" typically may contain all the data from one or more
+ "sections".
+
+ Note that the section header table is optional in ELF executables,
+ but it is this information that is most useful to gdb. If the
+ section header table is missing, then gdb should probably try
+ to make do with the program header table. (FIXME)
+
+*/
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "libbfd.h"
+#include "libelf.h"
+
+#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
+
+/* Forward declarations of static functions */
+
+static char *
+elf_read PARAMS ((bfd *, long, int));
+
+static struct sec *
+section_from_elf_index PARAMS ((bfd *, 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));
+
+/* Forward data declarations */
+
+extern bfd_target elf_little_vec, elf_big_vec;
+
+/* Currently the elf_symbol_type struct just contains the generic bfd
+ symbol structure. */
+
+typedef struct
+{
+ asymbol symbol;
+} elf_symbol_type;
+
+/* 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;
+ void *prstatus; /* The raw /proc prstatus structure */
+ void *prpsinfo; /* The raw /proc prpsinfo structure */
+};
+
+#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 core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
+#define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
+
+/* Translate an ELF symbol in external format into an ELF symbol in internal
+ format. */
+
+static void
+DEFUN(elf_swap_symbol_in,(abfd, src, dst),
+ bfd *abfd AND
+ Elf_External_Sym *src AND
+ Elf_Internal_Sym *dst)
+{
+ dst -> st_name = bfd_h_get_32 (abfd, (bfd_byte *) src -> st_name);
+ dst -> st_value = bfd_h_get_32 (abfd, (bfd_byte *) src -> st_value);
+ dst -> st_size = bfd_h_get_32 (abfd, (bfd_byte *) src -> st_size);
+ dst -> st_info = bfd_h_get_8 (abfd, (bfd_byte *) src -> st_info);
+ dst -> st_other = bfd_h_get_8 (abfd, (bfd_byte *) src -> st_other);
+ dst -> st_shndx = bfd_h_get_16 (abfd, (bfd_byte *) src -> st_shndx);
+}
+
+/* Translate an ELF symbol in internal format into an ELF symbol in external
+ format. */
+
+static void
+DEFUN(elf_swap_symbol_out,(abfd, src, dst),
+ bfd *abfd AND
+ Elf_Internal_Sym *src AND
+ Elf_External_Sym *dst)
+{
+ bfd_h_put_32 (abfd, src->st_name, dst->st_name);
+ bfd_h_put_32 (abfd, src->st_value, dst->st_value);
+ bfd_h_put_32 (abfd, src->st_size, dst->st_size);
+ bfd_h_put_8 (abfd, src->st_info, dst->st_info);
+ bfd_h_put_8 (abfd, src->st_other, dst->st_other);
+ bfd_h_put_16 (abfd, src->st_shndx, dst->st_shndx);
+}
+
+
+/* Translate an ELF file header in external format into an ELF file header in
+ internal format. */
+
+static void
+DEFUN(elf_swap_ehdr_in,(abfd, src, dst),
+ bfd *abfd AND
+ Elf_External_Ehdr *src AND
+ 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);
+ dst -> e_machine = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_machine);
+ dst -> e_version = bfd_h_get_32 (abfd, (bfd_byte *) src -> e_version);
+ dst -> e_entry = bfd_h_get_32 (abfd, (bfd_byte *) src -> e_entry);
+ dst -> e_phoff = bfd_h_get_32 (abfd, (bfd_byte *) src -> e_phoff);
+ dst -> e_shoff = bfd_h_get_32 (abfd, (bfd_byte *) src -> e_shoff);
+ dst -> e_flags = bfd_h_get_32 (abfd, (bfd_byte *) src -> e_flags);
+ dst -> e_ehsize = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_ehsize);
+ dst -> e_phentsize = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_phentsize);
+ dst -> e_phnum = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_phnum);
+ dst -> e_shentsize = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_shentsize);
+ dst -> e_shnum = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_shnum);
+ dst -> e_shstrndx = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_shstrndx);
+}
+
+/* Translate an ELF file header in internal format into an ELF file header in
+ external format. */
+
+static void
+DEFUN(elf_swap_ehdr_out,(abfd, src, dst),
+ bfd *abfd AND
+ Elf_Internal_Ehdr *src AND
+ 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... */
+ bfd_h_put_16 (abfd, src->e_type, dst->e_type);
+ bfd_h_put_16 (abfd, src->e_machine, dst->e_machine);
+ bfd_h_put_32 (abfd, src->e_version, dst->e_version);
+ bfd_h_put_32 (abfd, src->e_entry, dst->e_entry);
+ bfd_h_put_32 (abfd, src->e_phoff, dst->e_phoff);
+ bfd_h_put_32 (abfd, src->e_shoff, dst->e_shoff);
+ bfd_h_put_32 (abfd, src->e_flags, dst->e_flags);
+ bfd_h_put_16 (abfd, src->e_ehsize, dst->e_ehsize);
+ bfd_h_put_16 (abfd, src->e_phentsize, dst->e_phentsize);
+ bfd_h_put_16 (abfd, src->e_phnum, dst->e_phnum);
+ bfd_h_put_16 (abfd, src->e_shentsize, dst->e_shentsize);
+ bfd_h_put_16 (abfd, src->e_shnum, dst->e_shnum);
+ bfd_h_put_16 (abfd, src->e_shstrndx, dst->e_shstrndx);
+}
+
+
+/* Translate an ELF section header table entry in external format into an
+ 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)
+{
+ 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);
+ dst->sh_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_flags);
+ dst->sh_addr = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_addr);
+ dst->sh_offset = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_offset);
+ dst->sh_size = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_size);
+ dst->sh_link = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_link);
+ dst->sh_info = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_info);
+ dst->sh_addralign = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_addralign);
+ dst->sh_entsize = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_entsize);
+ /* we haven't done any processing on it yet, so... */
+ dst->rawdata = (void*)0;
+}
+
+/* Translate an ELF section header table entry in internal format into an
+ 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)
+{
+ /* note that all elements of dst are *arrays of unsigned char* already... */
+ bfd_h_put_32 (abfd, src->sh_name, dst->sh_name);
+ bfd_h_put_32 (abfd, src->sh_type, dst->sh_type);
+ bfd_h_put_32 (abfd, src->sh_flags, dst->sh_flags);
+ bfd_h_put_32 (abfd, src->sh_addr, dst->sh_addr);
+ bfd_h_put_32 (abfd, src->sh_offset, dst->sh_offset);
+ bfd_h_put_32 (abfd, src->sh_size, dst->sh_size);
+ bfd_h_put_32 (abfd, src->sh_link, dst->sh_link);
+ bfd_h_put_32 (abfd, src->sh_info, dst->sh_info);
+ bfd_h_put_32 (abfd, src->sh_addralign, dst->sh_addralign);
+ bfd_h_put_32 (abfd, src->sh_entsize, dst->sh_entsize);
+}
+
+
+/* Translate an ELF program header table entry in external format into an
+ 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)
+{
+ dst->p_type = bfd_h_get_32 (abfd, (bfd_byte *) src->p_type);
+ dst->p_offset = bfd_h_get_32 (abfd, (bfd_byte *) src->p_offset);
+ dst->p_vaddr = bfd_h_get_32 (abfd, (bfd_byte *) src->p_vaddr);
+ dst->p_paddr = bfd_h_get_32 (abfd, (bfd_byte *) src->p_paddr);
+ dst->p_filesz = bfd_h_get_32 (abfd, (bfd_byte *) src->p_filesz);
+ dst->p_memsz = bfd_h_get_32 (abfd, (bfd_byte *) src->p_memsz);
+ dst->p_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->p_flags);
+ dst->p_align = bfd_h_get_32 (abfd, (bfd_byte *) src->p_align);
+}
+
+
+/* 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)
+{
+ dst->r_offset = bfd_h_get_32 (abfd, (bfd_byte *) src->r_offset);
+ dst->r_info = bfd_h_get_32 (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)
+{
+ dst->r_offset = bfd_h_get_32 (abfd, (bfd_byte *) src->r_offset);
+ dst->r_info = bfd_h_get_32 (abfd, (bfd_byte *) src->r_info);
+ dst->r_addend = bfd_h_get_32 (abfd, (bfd_byte *) src->r_addend);
+}
+
+/* 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)
+{
+ bfd_h_put_32 (abfd, src->r_offset, dst->r_offset);
+ bfd_h_put_32 (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)
+{
+ bfd_h_put_32 (abfd, src->r_offset, dst->r_offset);
+ bfd_h_put_32 (abfd, src->r_info, dst->r_info);
+ bfd_h_put_32 (abfd, src->r_addend, dst->r_addend);
+}
+
+/*
+INTERNAL_FUNCTION
+ bfd_elf_find_section
+
+SYNOPSIS
+ struct elf_internal_shdr *bfd_elf_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(bfd_elf_find_section, (abfd, name),
+ bfd *abfd AND
+ char *name)
+{
+ Elf_Internal_Shdr *i_shdrp;
+ Elf_Internal_Shdr *gotit = NULL;
+ char *shstrtab;
+ unsigned int max;
+ unsigned int i;
+
+ i_shdrp = elf_elfsections (abfd);
+ if (i_shdrp != NULL)
+ {
+ 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];
+ }
+ }
+ }
+ }
+ 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)
+ {
+ 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;
+ }
+ }
+ return (shstrtab);
+}
+
+static char *
+DEFUN(elf_string_from_elf_section, (abfd, shindex, strindex),
+ bfd *abfd AND
+ unsigned int shindex AND
+ unsigned int strindex)
+{
+ Elf_Internal_Shdr *i_shdrp = elf_elfsections (abfd);
+ Elf_Internal_Shdr *hdr = i_shdrp + shindex;
+
+ if (! hdr->rawdata)
+ {
+ if (elf_get_str_section (abfd, shindex) == NULL)
+ {
+ return NULL;
+ }
+ }
+ return ((char*)hdr->rawdata)+strindex;
+}
+
+#define elf_string_from_elf_strtab(abfd, strindex) \
+ elf_string_from_elf_section (abfd, elf_elfheader(abfd)->e_shstrndx, strindex)
+
+/* 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)
+{
+ Elf_Internal_Shdr *i_shdrp = elf_elfsections (abfd);
+ Elf_Internal_Shdr *hdr = i_shdrp + shindex;
+ asection *newsect;
+ char *name;
+
+ name = hdr->sh_name ?
+ elf_string_from_elf_strtab (abfd, hdr->sh_name) : "unnamed";
+
+ switch(hdr->sh_type) {
+
+ case SHT_NULL:
+ /* inactive section. Throw it away. */
+ return true;
+
+ case SHT_PROGBITS:
+ case SHT_NOBITS:
+ /* Bits that get saved. This one is real. */
+ if (! hdr->rawdata )
+ {
+ newsect = bfd_make_section (abfd, name);
+ 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;
+
+ if (hdr->sh_flags & SHF_ALLOC)
+ {
+ newsect->flags |= SEC_ALLOC;
+ if (hdr->sh_type != SHT_NOBITS)
+ newsect->flags |= SEC_LOAD;
+ }
+
+ if (!(hdr->sh_flags & SHF_WRITE))
+ newsect->flags |= SEC_READONLY;
+
+ if (hdr->sh_flags & SHF_EXECINSTR)
+ newsect->flags |= SEC_CODE; /* FIXME: may only contain SOME code */
+ else
+ newsect->flags |= SEC_DATA;
+
+ hdr->rawdata = (void*)newsect;
+ }
+ return true;
+ break;
+
+ case SHT_SYMTAB: /* A symbol table */
+ BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym));
+ elf_onesymtab (abfd) = shindex;
+ abfd->flags |= HAS_SYMS;
+ return true;
+
+ case SHT_STRTAB: /* A string table */
+ 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. */
+ /* 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 */
+
+ {
+ asection *target_sect;
+
+ bfd_section_from_shdr (abfd, hdr->sh_link); /* symbol table */
+ bfd_section_from_shdr (abfd, hdr->sh_info); /* target */
+ target_sect = section_from_elf_index (abfd, hdr->sh_info);
+ if (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
+
+ 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;
+ 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");
+ abort ();
+#endif
+ break;
+
+ case SHT_NOTE:
+#if 0
+ fprintf(stderr, "Note Sections not yet supported.\n");
+ abort ();
+#endif
+ break;
+
+ case SHT_SHLIB:
+#if 0
+ fprintf(stderr, "SHLIB Sections not supported (and non conforming.)\n");
+#endif
+ return true;
+
+ default:
+ break;
+ }
+
+ return (true);
+}
+
+
+
+
+struct strtab {
+ char *tab;
+ int nentries;
+ int length;
+};
+
+
+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)
+{
+ /* 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. */
+
+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;
+
+ /* figure out out to write the section name from the bfd section name. MWE */
+
+ 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_flags = 0;
+ /* these need to be preserved on */
+ hdr[indx].sh_link = 0;
+ hdr[indx].sh_info = 0;
+ hdr[indx].sh_addralign = 0;
+ hdr[indx].sh_entsize = 0;
+
+ hdr[indx].sh_type = 0;
+ if (sect->flags & SEC_RELOC) {
+ hdr[indx].sh_type = SHT_RELA; /* FIXME -- sparc specific */
+ }
+
+ if (sect->flags & SEC_HAS_CONTENTS)
+ {
+ hdr[indx].sh_offset = sect->filepos;
+ hdr[indx].sh_size = sect->_raw_size;
+ }
+ if (sect->flags & SEC_ALLOC)
+ {
+ hdr[indx].sh_flags |= SHF_ALLOC;
+ if (sect->flags & SEC_LOAD)
+ {
+ /* do something with sh_type ? */
+ }
+ }
+ if (!(sect->flags & SEC_READONLY))
+ hdr[indx].sh_flags |= SHF_WRITE;
+
+ if (sect->flags & SEC_CODE)
+ hdr[indx].sh_flags |= SHF_EXECINSTR;
+
+ return (true);
+}
+
+/* Create a new bfd section from an ELF program header.
+
+ Since program segments have no names, we generate a synthetic name
+ of the form segment<NUM>, where NUM is generally the index in the
+ program header table. For segments that are split (see below) we
+ generate the names segment<NUM>a and segment<NUM>b.
+
+ Note that some program segments may have a file size that is different than
+ (less than) the memory size. All this means is that at execution the
+ system must allocate the amount of memory specified by the memory size,
+ but only initialize it with the first "file size" bytes read from the
+ file. This would occur for example, with program segments consisting
+ of combined data+bss.
+
+ To handle the above situation, this routine generates TWO bfd sections
+ for the single program segment. The first has the length specified by
+ the file size of the segment, and the second has the length specified
+ by the difference between the two sizes. In effect, the segment is split
+ into it's initialized and uninitialized parts.
+
+ */
+
+static boolean
+DEFUN(bfd_section_from_phdr, (abfd, hdr, index),
+ bfd *abfd AND
+ Elf_Internal_Phdr *hdr AND
+ int index)
+{
+ asection *newsect;
+ char *name;
+ char namebuf[64];
+ int split;
+
+ split = ((hdr -> p_memsz > 0) &&
+ (hdr -> p_filesz > 0) &&
+ (hdr -> p_memsz > hdr -> p_filesz));
+ sprintf (namebuf, split ? "segment%da" : "segment%d", index);
+ name = bfd_alloc (abfd, strlen (namebuf) + 1);
+ strcpy (name, namebuf);
+ newsect = bfd_make_section (abfd, name);
+ newsect -> vma = hdr -> p_vaddr;
+ newsect -> _raw_size = hdr -> p_filesz;
+ newsect -> filepos = hdr -> p_offset;
+ newsect -> flags |= SEC_HAS_CONTENTS;
+ if (hdr -> p_type == PT_LOAD)
+ {
+ newsect -> flags |= SEC_ALLOC;
+ newsect -> flags |= SEC_LOAD;
+ if (hdr -> p_flags & PF_X)
+ {
+ /* FIXME: all we known is that it has execute PERMISSION,
+ may be data. */
+ newsect -> flags |= SEC_CODE;
+ }
+ }
+ if (!(hdr -> p_flags & PF_W))
+ {
+ newsect -> flags |= SEC_READONLY;
+ }
+
+ if (split)
+ {
+ sprintf (namebuf, "segment%db", index);
+ name = bfd_alloc (abfd, strlen (namebuf) + 1);
+ strcpy (name, namebuf);
+ newsect = bfd_make_section (abfd, name);
+ newsect -> vma = hdr -> p_vaddr + hdr -> p_filesz;
+ newsect -> _raw_size = hdr -> p_memsz - hdr -> p_filesz;
+ if (hdr -> p_type == PT_LOAD)
+ {
+ newsect -> flags |= SEC_ALLOC;
+ if (hdr -> p_flags & PF_X)
+ newsect -> flags |= SEC_CODE;
+ }
+ if (!(hdr -> p_flags & PF_W))
+ newsect -> flags |= SEC_READONLY;
+ }
+
+ return (true);
+}
+
+#ifdef HAVE_PROCFS
+
+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;
+
+ 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
+DEFUN(bfd_prpsinfo,(abfd, descdata, descsz, filepos),
+ bfd *abfd AND
+ char *descdata AND
+ int descsz AND
+ 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
+DEFUN(bfd_fpregset,(abfd, descdata, descsz, filepos),
+ bfd *abfd AND
+ char *descdata AND
+ int descsz AND
+ 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 *
+DEFUN(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
+DEFUN(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_core_file_matches_executable_p, (core_bfd, exec_bfd),
+ bfd *core_bfd AND
+ bfd *exec_bfd)
+{
+#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_error = system_call_error;
+ 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);
+
+#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
+DEFUN(elf_corefile_note, (abfd, hdr),
+ bfd *abfd AND
+ 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 *) 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;
+
+}
+
+
+/* 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. */
+
+static char *
+DEFUN(elf_read, (abfd, offset, size),
+ bfd *abfd AND
+ long offset AND
+ int size)
+{
+ char *buf;
+
+ if ((buf = bfd_alloc (abfd, size)) == NULL)
+ {
+ bfd_error = no_memory;
+ return (NULL);
+ }
+ if (bfd_seek (abfd, offset, SEEK_SET) == -1)
+ {
+ 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.
+
+ */
+
+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 */
+
+ /* Read in the ELF header in external format. */
+
+ if (bfd_read ((PTR) &x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr))
+ {
+ bfd_error = system_call_error;
+ return (NULL);
+ }
+
+ /* 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). */
+
+ if (x_ehdr.e_ident[EI_MAG0] != ELFMAG0 ||
+ x_ehdr.e_ident[EI_MAG1] != ELFMAG1 ||
+ x_ehdr.e_ident[EI_MAG2] != ELFMAG2 ||
+ x_ehdr.e_ident[EI_MAG3] != ELFMAG3)
+ {
+wrong:
+ bfd_error = wrong_format;
+ return (NULL);
+ }
+
+ /* FIXME, Check EI_VERSION here ! */
+
+ switch (x_ehdr.e_ident[EI_CLASS])
+ {
+ 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 */
+ }
+
+ /* Switch xvec to match the specified byte order. */
+ switch (x_ehdr.e_ident[EI_DATA])
+ {
+ 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;
+ }
+
+ /* Allocate an instance of the elf_obj_tdata structure and hook it up to
+ the tdata pointer in the bfd. */
+
+ if (NULL == (elf_tdata (abfd) = (struct elf_obj_tdata *)
+ bfd_zalloc (abfd, sizeof (struct elf_obj_tdata))))
+ {
+ bfd_error = no_memory;
+ return (NULL);
+ }
+
+ /* 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 there is no section header table, we're hosed. */
+ if (i_ehdrp->e_shoff == 0)
+ goto wrong;
+
+ if (i_ehdrp->e_type == ET_EXEC || i_ehdrp->e_type == ET_DYN)
+ abfd -> flags |= EXEC_P;
+
+ switch (i_ehdrp->e_machine)
+ {
+ case EM_NONE:
+ case EM_M32: /* or should this be bfd_arch_obscure? */
+ bfd_default_set_arch_mach(abfd, bfd_arch_unknown, 0);
+ break;
+ case EM_SPARC:
+ bfd_default_set_arch_mach(abfd, bfd_arch_sparc, 0);
+ break;
+ case EM_386:
+ bfd_default_set_arch_mach(abfd, bfd_arch_i386, 0);
+ break;
+ case EM_68K:
+ bfd_default_set_arch_mach(abfd, bfd_arch_m68k, 0);
+ break;
+ case EM_88K:
+ bfd_default_set_arch_mach(abfd, bfd_arch_m88k, 0);
+ break;
+ case EM_860:
+ bfd_default_set_arch_mach(abfd, bfd_arch_i860, 0);
+ break;
+ case EM_MIPS:
+ bfd_default_set_arch_mach(abfd, bfd_arch_mips, 0);
+ break;
+ default:
+ goto wrong;
+ }
+
+ /* 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++)
+ {
+ 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);
+ }
+
+ elf_elfsections (abfd) = i_shdrp;
+
+ /* 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.) */
+
+ shstrtab = elf_get_str_section (abfd, i_ehdrp->e_shstrndx);
+ if (! shstrtab)
+ return (NULL);
+
+ /* Once all of the section headers have been read and converted, we
+ can start processing them. Note that the first section header is
+ a dummy placeholder entry, so we ignore it.
+
+ We also watch for the symbol table section and remember the file
+ offset and section size for both the symbol table section and the
+ associated string table section. */
+
+ for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++)
+ {
+ bfd_section_from_shdr (abfd, shindex);
+ }
+
+ /* Remember the entry point specified in the ELF file header. */
+
+ bfd_get_start_address (abfd) = i_ehdrp->e_entry;
+
+ return (abfd->xvec);
+}
+
+/* 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 *
+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;
+
+ /* Read in the ELF header in external format. */
+
+ if (bfd_read ((PTR) &x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr))
+ {
+ bfd_error = system_call_error;
+ return (NULL);
+ }
+
+ /* 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 (x_ehdr.e_ident[EI_MAG0] != ELFMAG0 ||
+ x_ehdr.e_ident[EI_MAG1] != ELFMAG1 ||
+ x_ehdr.e_ident[EI_MAG2] != ELFMAG2 ||
+ x_ehdr.e_ident[EI_MAG3] != ELFMAG3)
+ {
+wrong:
+ bfd_error = wrong_format;
+ return (NULL);
+ }
+
+ /* FIXME, Check EI_VERSION here ! */
+
+ switch (x_ehdr.e_ident[EI_CLASS])
+ {
+ 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 */
+ }
+
+ /* 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_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 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_error = no_memory;
+ return (NULL);
+ }
+ if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1)
+ {
+ bfd_error = system_call_error;
+ return (NULL);
+ }
+ for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++)
+ {
+ if (bfd_read ((PTR) &x_phdr, sizeof (x_phdr), 1, abfd)
+ != sizeof (x_phdr))
+ {
+ bfd_error = system_call_error;
+ return (NULL);
+ }
+ 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);
+}
+
+boolean
+DEFUN (elf_mkobject, (abfd), bfd *abfd)
+{
+ /* 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) {
+ bfd_error = no_memory;
+ return false;
+ }
+ /* 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.
+
+*/
+
+/* lacking nested functions and nested types, set up for mapping over
+ BFD sections to produce ELF sections */
+
+typedef struct {
+ Elf_Internal_Ehdr *i_ehdr;
+ Elf_Internal_Shdr *i_shdrp;
+ struct strtab *shstrtab;
+ int symtab_section;
+} elf_sect_thunk;
+
+
+
+static void
+DEFUN (elf_make_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;
+ int idx;
+
+ /* 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 = elf_section_from_bfd_section (abfd, asect);
+ this_hdr = &thunk->i_shdrp[this_section];
+
+ 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)
+ {
+ /* emit a reloc section, and thus strtab and symtab... */
+ Elf_Internal_Shdr *rela_hdr;
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_External_Rela *outbound_relocs;
+ int rela_section;
+
+ symtab_hdr = &thunk->i_shdrp[thunk->symtab_section];
+
+ 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_type = SHT_RELA;
+ rela_hdr->sh_link = thunk->symtab_section;
+ rela_hdr->sh_info = this_section;
+ rela_hdr->sh_entsize = sizeof (Elf_External_Rela);
+ /* orelocation has the data, reloc_count has the count... */
+ rela_hdr->sh_size = rela_hdr->sh_entsize * asect->reloc_count;
+ outbound_relocs = (Elf_External_Rela *)
+ bfd_alloc(abfd, asect->reloc_count * sizeof(Elf_External_Rela));
+ for (idx = 0; idx < asect->reloc_count; idx++)
+ {
+ Elf_Internal_Rela dst;
+ arelent *ptr;
+ Elf_External_Rela *src;
+
+ ptr = asect->orelocation[idx];
+ src = outbound_relocs + idx;
+ if (asect->flags & SEC_RELOC)
+ dst.r_offset = ptr->address - asect->vma;
+ else
+ dst.r_offset = ptr->address;
+
+ dst.r_info = ELF_R_INFO(1 /*ptr->sym_ptr_ptr*/, /* needs index into symtab (FIXME) */
+ ptr->howto->type);
+
+ dst.r_addend = ptr->addend;
+ elf_swap_reloca_out(abfd, &dst, src);
+ }
+ rela_hdr->contents = (void*)outbound_relocs;
+ }
+ }
+}
+
+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;
+ if ((asect->flags & SEC_ALLOC) && (asect->flags & SEC_LOAD))
+ this_hdr->sh_type = SHT_PROGBITS;
+ else
+ /* what *do* we put here? */
+ this_hdr->sh_type = SHT_PROGBITS;
+
+
+ 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_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];
+
+ 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, ".rela", asect->name);
+ rela_hdr->sh_type = SHT_RELA;
+ rela_hdr->sh_link = thunk->symtab_section;
+ rela_hdr->sh_info = this_section;
+ rela_hdr->sh_entsize = sizeof (Elf_External_Rela);
+ }
+ }
+}
+
+
+static boolean
+DEFUN (elf_compute_section_file_positions, (abfd), bfd *abfd)
+{
+ Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
+ Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */
+ struct strtab *shstrtab;
+ int count, maxsections;
+ 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;
+ /* 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;
+
+ /* and we'll just have to fix up the offsets later. */
+ /* outbase += i_ehdr.e_shentsize * i_ehdr.e_shnum; */
+
+ 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;
+ }
+
+
+ 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_shnum = 1;
+
+ elf_elfsections (abfd) = i_shdrp;
+ elf_shstrtab (abfd) = shstrtab;
+ }
+ est.i_ehdr = elf_elfheader(abfd);
+ est.i_shdrp = elf_elfsections(abfd);
+ est.shstrtab = elf_shstrtab(abfd);
+ est.symtab_section = 0; /* elf_fake_sections fils it in */
+
+ bfd_map_over_sections(abfd, elf_fake_sections, &est);
+ elf_onesymtab (abfd) = est.symtab_section;
+ return (true);
+}
+
+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_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;
+ struct strtab *shstrtab;
+
+ if(abfd->output_has_begun == false)
+ elf_compute_section_file_positions(abfd);
+
+ 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);
+
+ /* dump out the one symtab */
+ {
+ 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];
+ symtab_hdr->sh_type = SHT_SYMTAB;
+ symtab_hdr->sh_entsize = sizeof (Elf_External_Sym);
+ symtab_hdr->sh_size = symtab_hdr->sh_entsize * symcount;
+
+ /* 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->sh_type = SHT_STRTAB;
+
+ outbound_syms = (Elf_External_Sym*)
+ bfd_alloc(abfd, (1+symcount) * sizeof(Elf_External_Sym));
+ /* now generate the data (for "contents") */
+ for (idx = 0; idx < symcount; idx++)
+ {
+ Elf_Internal_Sym sym;
+ sym.st_name = bfd_add_to_strtab (abfd, stt, syms[idx]->name);
+ sym.st_value = syms[idx]->value;
+ sym.st_size = 0; /* we should recover this (FIXME) */
+ if (syms[idx]->flags & BSF_WEAK)
+ sym.st_info = ELF_ST_INFO(STB_WEAK, STT_OBJECT);
+ else if (syms[idx]->flags & BSF_LOCAL)
+ sym.st_info = ELF_ST_INFO(STB_LOCAL, STT_OBJECT);
+ else if (syms[idx]->flags & BSF_GLOBAL)
+ sym.st_info = ELF_ST_INFO(STB_GLOBAL, 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);
+
+ 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+idx+1);
+ }
+ {
+ /* fill in 0th symbol */
+ Elf_Internal_Sym sym;
+ sym.st_name = 0;
+ sym.st_value = 0;
+ sym.st_size = 0;
+ sym.st_info = 0;
+ sym.st_other = 0;
+ sym.st_shndx = SHN_UNDEF;
+ elf_swap_symbol_out (abfd, &sym, outbound_syms);
+ }
+ symtab_hdr->contents = (void*)outbound_syms;
+ symstrtab_hdr->contents = (void*)stt->tab;
+ symstrtab_hdr->sh_size = stt->length;
+ }
+
+ /* 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->sh_type = SHT_STRTAB;
+ this_hdr->sh_size = shstrtab->length;
+ this_hdr->contents = (void*)shstrtab->tab;
+ }
+
+ outbase = i_ehdrp->e_ehsize;
+
+ /* 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);
+
+ outbase += i_ehdrp->e_shentsize * i_ehdrp->e_shnum;
+
+ /* now we fix up the offsets... */
+ for (count = 1; count < i_ehdrp->e_shnum; count ++)
+ {
+ i_shdrp[count].sh_offset = outbase;
+ outbase += i_shdrp[count].sh_size;
+ }
+
+ /* at this point we've concocted all the ELF sections... */
+ x_shdrp = (Elf_External_Shdr *)
+ bfd_alloc (abfd, sizeof (*x_shdrp) * (i_ehdrp->e_shnum));
+ if (! x_shdrp)
+ {
+ bfd_error = no_memory;
+ return (false);
+ }
+
+ for (count = 0; count < i_ehdrp->e_shnum; count ++)
+ {
+ elf_swap_shdr_out (abfd, i_shdrp+count, x_shdrp+count);
+ }
+ 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 ++)
+ {
+ 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);
+ }
+ }
+
+ /* sample use of bfd:
+ * bfd_seek (abfd, (file_ptr) 0, SEEK_SET);
+ * bfd_write ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd);
+ * if (bfd_seek(abfd, scn_base, SEEK_SET) != 0)
+ * return false;
+ * old = bfd_tell(abfd);
+ */
+
+ return true;
+
+}
+
+/* Given an index of a section, retrieve a pointer to it. Note
+ that for our purposes, sections are indexed by {1, 2, ...} with
+ 0 being an illegal index. */
+
+/* In the original, each ELF section went into exactly one BFD
+ section. This doesn't really make sense, so we need a real mapping.
+ The mapping has to hide in the Elf_Internal_Shdr since asection
+ doesn't have anything like a tdata field... */
+
+static struct sec *
+DEFUN (section_from_elf_index, (abfd, index),
+ bfd *abfd AND
+ int index)
+{
+ Elf_Internal_Shdr *i_shdrp = elf_elfsections (abfd);
+ Elf_Internal_Shdr *hdr = i_shdrp + index;
+
+ switch (hdr->sh_type)
+ {
+ /* ELF sections that map to BFD sections */
+ case SHT_PROGBITS:
+ case SHT_NOBITS:
+ if (! hdr->rawdata)
+ bfd_section_from_shdr (abfd, index);
+ return (struct sec *)hdr->rawdata;
+
+ default:
+ return (struct sec *)&bfd_abs_section;
+ }
+}
+
+/* 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_Internal_Shdr *i_shdrp = elf_elfsections (abfd);
+ int index;
+ Elf_Internal_Shdr *hdr;
+ int maxindex = elf_elfheader (abfd)->e_shnum;
+
+ for(index = 0; index < maxindex; index++) {
+ hdr = &i_shdrp[index];
+ switch (hdr->sh_type)
+ {
+ /* ELF sections that map to BFD sections */
+ case SHT_PROGBITS:
+ case SHT_NOBITS:
+ if (hdr->rawdata)
+ {
+ if (((struct sec *)(hdr->rawdata)) == asect)
+ return index;
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ return 0;
+}
+
+static boolean
+DEFUN (elf_slurp_symbol_table, (abfd, symptrs),
+ bfd *abfd AND
+ asymbol **symptrs) /* Buffer for generated bfd symbols */
+{
+ 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;
+ asymbol *sym; /* Pointer to current bfd symbol */
+ asymbol *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);
+ }
+
+ /* Read each raw ELF symbol, converting from external ELF form to
+ internal ELF form, and then using the information to create a
+ canonical bfd symbol table entry.
+
+ Note that we allocate the initial bfd canonical symbol buffer
+ based on a one-to-one mapping of the ELF symbols to canonical
+ symbols. We actually use all the ELF symbols, so there will be no
+ space left over at the end. When we have all the symbols, we
+ build the caller's pointer vector. */
+
+ if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1)
+ {
+ bfd_error = system_call_error;
+ return (false);
+ }
+
+ symcount = hdr->sh_size / sizeof (Elf_External_Sym);
+ symbase = (asymbol *) bfd_zalloc (abfd, symcount * sizeof (asymbol));
+ 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++)
+ {
+ elf_swap_symbol_in (abfd, x_symp + i, &i_sym);
+ sym -> the_bfd = abfd;
+ if (i_sym.st_name > 0)
+ sym -> name = elf_string_from_elf_section(abfd, hdr->sh_link,
+ i_sym.st_name);
+ else
+ sym -> name = "unnamed"; /* perhaps should include the number? */
+ sym -> value = i_sym.st_value;
+/* 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 */
+ sym -> udata = (PTR)i_sym.st_size;
+/* FIXME -- end of bogosity. */
+ if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERV)
+ {
+ sym -> section = section_from_elf_index (abfd, i_sym.st_shndx);
+ }
+ else if (i_sym.st_shndx == SHN_ABS)
+ {
+ sym -> section = &bfd_abs_section;
+ }
+ else if (i_sym.st_shndx == SHN_COMMON)
+ {
+ sym -> section = &bfd_com_section;
+ }
+ else if (i_sym.st_shndx == SHN_UNDEF)
+ {
+ sym -> section = &bfd_und_section;
+ }
+ else
+ sym -> section = &bfd_abs_section;
+
+ switch (ELF_ST_BIND (i_sym.st_info))
+ {
+ case STB_LOCAL:
+ sym -> flags |= BSF_LOCAL;
+ break;
+ case STB_GLOBAL:
+ sym -> flags |= (BSF_GLOBAL | BSF_EXPORT);
+ break;
+ case STB_WEAK:
+ sym -> flags |= BSF_WEAK;
+ break;
+ }
+
+ switch (ELF_ST_TYPE (i_sym.st_info))
+ {
+ case STT_SECTION:
+ sym->flags |= BSF_SECTION_SYM | BSF_DEBUGGING;
+ break;
+ case STT_FILE:
+ sym->flags |= BSF_FILE | BSF_DEBUGGING;
+ break;
+ }
+ sym++;
+ }
+
+ /* We rely on the zalloc to clear out the final symbol entry. */
+
+ /* We're now done with the raw symbols. */
+ free ((PTR)x_symp);
+
+ bfd_get_symcount(abfd) = symcount = sym - symbase;
+
+ /* Fill in the user's symbol pointer vector if needed. */
+ if (symptrs)
+ {
+ sym = symbase;
+ while (symcount-- > 0)
+ {
+ *symptrs++ = sym++;
+ }
+ *symptrs = 0; /* Final null pointer */
+ }
+
+ return (true);
+}
+
+/* Return the number of bytes required to hold the symtab vector.
+
+ Note that we base it on the count plus 1, since we will null terminate
+ 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)
+{
+ unsigned int symcount;
+ unsigned int symtab_size = 0;
+ Elf_Internal_Shdr *i_shdrp;
+ Elf_Internal_Shdr *hdr;
+
+ 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);
+}
+
+/*
+ This function return the number of bytes required to store the
+ relocation information associated with section <<sect>>
+ attached to bfd <<abfd>>
+
+*/
+unsigned int
+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;
+ }
+ else
+ return (0);
+}
+
+static boolean
+DEFUN(elf_slurp_reloca_table,(abfd, asect, symbols),
+ bfd *abfd AND
+ sec_ptr asect AND
+ asymbol **symbols)
+{
+ Elf_External_Rela *native_relocs;
+ arelent *reloc_cache;
+ arelent *cache_ptr;
+
+ unsigned int idx;
+
+ if (asect->relocation)
+ return true;
+ if (asect->reloc_count == 0)
+ return true;
+ if (asect->flags & SEC_CONSTRUCTOR)
+ return true;
+
+ bfd_seek (abfd, asect->rel_filepos, SEEK_SET);
+ 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);
+
+ reloc_cache = (arelent *)
+ bfd_alloc(abfd, (size_t) (asect->reloc_count * sizeof(arelent)));
+
+ if (! reloc_cache) {
+ bfd_error = no_memory;
+ return false;
+ }
+
+ for (idx = 0; idx < asect->reloc_count; idx ++)
+ {
+#ifdef RELOC_PROCESSING
+ /* sparc, 68k, 88k, 860 use rela only. */
+ /* 386 and we32000 use rel only... fix it for them later. */
+ Elf_Internal_Rela dst;
+ Elf_External_Rela *src;
+
+ cache_ptr = reloc_cache + idx;
+ src = native_relocs + idx;
+ elf_swap_reloca_in(abfd, src, &dst);
+
+ 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 */
+ cache_ptr->address = dst.r_offset + asect->vma;
+ }
+ else
+ {
+ /* 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... */
+ cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM(dst.r_info);
+ cache_ptr->addend = dst.r_addend;
+
+ /* Fill in the cache_ptr->howto field from dst.r_type */
+ {
+ struct elf_backend_data *ebd;
+ ebd = (struct elf_backend_data *) (abfd->xvec->backend_data);
+ (*ebd->elf_info_to_howto)(abfd, cache_ptr, &dst);
+ }
+#endif
+ }
+
+ asect->relocation = reloc_cache;
+ return true;
+}
+
+
+unsigned int
+elf_canonicalize_reloc (abfd, section, relptr, symbols)
+bfd *abfd;
+sec_ptr section;
+arelent **relptr;
+asymbol **symbols;
+{
+ arelent *tblptr = section->relocation;
+ unsigned int count = 0;
+
+ /* snarfed from coffcode.h */
+ /* FIXME: this could be reloc... */
+ elf_slurp_reloca_table(abfd, section, symbols);
+
+ tblptr = section->relocation;
+ if (!tblptr)
+ return 0;
+
+ for (; count++ < section->reloc_count;)
+ *relptr++ = tblptr++;
+
+ *relptr = 0;
+ return section->reloc_count;
+}
+
+unsigned int
+DEFUN (elf_get_symtab, (abfd, alocation),
+ bfd *abfd AND
+ asymbol **alocation)
+{
+
+ if (!elf_slurp_symbol_table (abfd, alocation))
+ return (0);
+ else
+ return (bfd_get_symcount (abfd));
+}
+
+asymbol *
+DEFUN (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;
+ return (NULL);
+ }
+ else
+ {
+ newsym -> symbol.the_bfd = abfd;
+ return (&newsym -> symbol);
+ }
+}
+
+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)
+{
+ FILE *file = (FILE *)filep;
+ switch (how)
+ {
+ case bfd_print_symbol_name:
+ fprintf(file, "%s", symbol->name);
+ break;
+ case bfd_print_symbol_more:
+ fprintf(file, "elf %lx %lx",
+ symbol->value,
+ symbol->flags);
+ break;
+ case bfd_print_symbol_nm:
+ case bfd_print_symbol_all:
+ {
+ CONST char *section_name;
+ section_name = symbol->section? symbol->section->name : "(*none*)";
+ bfd_print_symbol_vandf((PTR) file, symbol);
+ fprintf(file, " %s\t%s",
+ section_name,
+ symbol->name);
+ }
+ break;
+ }
+
+}
+
+alent *
+DEFUN (elf_get_lineno,(ignore_abfd, symbol),
+ bfd *ignore_abfd AND
+ asymbol *symbol)
+{
+ fprintf (stderr, "elf_get_lineno unimplemented\n");
+ fflush (stderr);
+ abort ();
+ return (NULL);
+}
+
+boolean
+DEFUN (elf_set_arch_mach,(abfd, arch, machine),
+ bfd *abfd AND
+ enum bfd_architecture arch AND
+ unsigned long machine)
+{
+ /* Allow any architecture to be supported by the elf backend */
+ switch(arch)
+ {
+ case bfd_arch_unknown: /* EM_NONE */
+ case bfd_arch_sparc: /* EM_SPARC */
+ case bfd_arch_i386: /* EM_386 */
+ case bfd_arch_m68k: /* EM_68K */
+ case bfd_arch_m88k: /* EM_88K */
+ case bfd_arch_i860: /* EM_860 */
+ case bfd_arch_mips: /* EM_MIPS (MIPS R3000) */
+ 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);
+ abort ();
+ return (false);
+}
+
+int
+DEFUN (elf_sizeof_headers, (abfd, reloc),
+ bfd *abfd AND
+ boolean reloc)
+{
+ fprintf (stderr, "elf_sizeof_headers unimplemented\n");
+ fflush (stderr);
+ abort ();
+ return (0);
+}
+
+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)
+{
+ int dest_sect;
+ void *contents;
+ if (abfd->output_has_begun == false) /* set by bfd.c handler? */
+ {
+ /* do setup calculations (FIXME) */
+ elf_compute_section_file_positions(abfd);
+ }
+#if 0
+ if(bfd_seek (abfd, (file_ptr)section->filepos + offset, SEEK_SET) == -1)
+ return false;
+ if(bfd_write (location, (bfd_size_type)1, count, abfd) != count)
+ return false;
+#endif
+ /* we really just need to save the contents away... */
+ dest_sect = elf_section_from_bfd_section(abfd, section);
+ if(!dest_sect)
+ return false;
+
+ /* FIXME: allocate in set_section_size, then copy in here... */
+ contents = (void*)bfd_alloc(abfd, count);
+ BFD_ASSERT(contents);
+ memcpy(contents, location, count);
+ elf_elfsections (abfd)[dest_sect].contents = contents;
+
+ return true;
+}
+
+void
+DEFUN (elf_no_info_to_howto, (abfd, cache_ptr, dst),
+ bfd *abfd AND
+ arelent *cache_ptr AND
+ Elf_Internal_Rela *dst)
+{
+ abort ();
+}
projects / binutils-gdb.git / commitdiff