+++ /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 "obstack.h"
-#include "elf/common.h"
-#include "elf/internal.h"
-#include "elf/external.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 void
-elf_info_to_howto PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
-
-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.
- */
-
-static 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.
- */
-
-static 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.
-
- */
-
-static 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).
-
- */
-
-static 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 */
- abfd->xvec = &elf_big_vec;
- break;
- case ELFDATA2LSB: /* Little-endian */
- abfd->xvec = &elf_little_vec;
- 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);
-}
-
-static 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);
-}
-
-static 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_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 = 0; 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;
- break;
- 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. */
-
-static 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>>
-
-*/
-static 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);
-}
-
-enum reloc_type
- {
- R_SPARC_offset = 0,
- R_SPARC_NONE = 0,
- R_SPARC_8, R_SPARC_16, R_SPARC_32,
- R_SPARC_DISP8, R_SPARC_DISP16, R_SPARC_DISP32,
- R_SPARC_WDISP30, R_SPARC_WDISP22,
- R_SPARC_HI22, R_SPARC_22,
- R_SPARC_13, R_SPARC_LO10,
- R_SPARC_GOT10, R_SPARC_GOT13, R_SPARC_GOT22,
- R_SPARC_PC10, R_SPARC_PC22,
- R_SPARC_WPLT30,
- R_SPARC_COPY,
- R_SPARC_GLOB_DAT, R_SPARC_JMP_SLOT,
- R_SPARC_RELATIVE,
- R_SPARC_UA32,
- R_SPARC_max,
-
- R_386_offset = R_SPARC_max,
- R_386_NONE = 0,
- R_386_32, R_386_PC32,
- R_386_GOT32, R_386_PLT32,
- R_386_COPY,
- R_386_GLOB_DAT, R_386_JUMP_SLOT,
- R_386_RELATIVE,
- R_386_GOTOFF, R_386_GOTPC,
- R_386_max,
- };
-
-#if 0 /* not used */
-#define RELOC_TYPE_NAMES \
- "R_SPARC_NONE", \
- "R_SPARC_8", "R_SPARC_16", "R_SPARC_32", \
- "R_SPARC_DISP8", "R_SPARC_DISP16", "R_SPARC_DISP32", \
- "R_SPARC_WDISP30", "R_SPARC_WDISP22", \
- "R_SPARC_HI22", "R_SPARC_22", \
- "R_SPARC_13", "R_SPARC_LO10", \
- "R_SPARC_GOT10", "R_SPARC_GOT13", "R_SPARC_GOT22", \
- "R_SPARC_PC10", "R_SPARC_PC22", \
- "R_SPARC_WPLT30", \
- "R_SPARC_COPY", \
- "R_SPARC_GLOB_DAT", "R_SPARC_JMP_SLOT", \
- "R_SPARC_RELATIVE", \
- "R_SPARC_UA32", \
- "R_386_NONE", \
- "R_386_32", "R_386_PC32", \
- "R_386_GOT32", "R_386_PLT32", \
- "R_386_COPY", \
- "R_386_GLOB_DAT", "R_386_JUMP_SLOT", \
- "R_386_RELATIVE", \
- "R_386_GOTOFF", "R_386_GOTPC"
-#endif
-
-static reloc_howto_type elf_sparc_howto_table[] =
-{
- HOWTO(R_SPARC_NONE, 0,0, 0,false,0,false,false, 0,"R_SPARC_NONE", false,0,0x00000000,false),
- HOWTO(R_SPARC_8, 0,0, 8,false,0,true, true, 0,"R_SPARC_8", false,0,0x000000ff,false),
- HOWTO(R_SPARC_16, 0,1,16,false,0,true, true, 0,"R_SPARC_16", false,0,0x0000ffff,false),
- HOWTO(R_SPARC_32, 0,2,32,false,0,true, true, 0,"R_SPARC_32", false,0,0xffffffff,false),
- HOWTO(R_SPARC_DISP8, 0,0, 8,true, 0,false, true, 0,"R_SPARC_DISP8", false,0,0x000000ff,false),
- HOWTO(R_SPARC_DISP16, 0,1,16,true, 0,false, true, 0,"R_SPARC_DISP16", false,0,0x0000ffff,false),
- HOWTO(R_SPARC_DISP32, 0,2,32,true, 0,false, true, 0,"R_SPARC_DISP32", false,0,0x00ffffff,false),
- HOWTO(R_SPARC_WDISP30,2,2,30,true, 0,false, true, 0,"R_SPARC_WDISP30",false,0,0x3fffffff,false),
- HOWTO(R_SPARC_WDISP22,2,2,22,true, 0,false, true, 0,"R_SPARC_WDISP22",false,0,0x003fffff,false),
- HOWTO(R_SPARC_HI22, 10,2,22,false,0,true, false, 0,"R_SPARC_HI22", false,0,0x003fffff,false),
- HOWTO(R_SPARC_22, 0,2,22,false,0,true, true, 0,"R_SPARC_22", false,0,0x003fffff,false),
- HOWTO(R_SPARC_13, 0,1,13,false,0,true, true, 0,"R_SPARC_13", false,0,0x00001fff,false),
- HOWTO(R_SPARC_LO10, 0,1,10,false,0,true, false, 0,"R_SPARC_LO10", false,0,0x000003ff,false),
- HOWTO(R_SPARC_GOT10, 0,1,10,false,0,false, true, 0,"R_SPARC_GOT10", false,0,0x000003ff,false),
- HOWTO(R_SPARC_GOT13, 0,1,13,false,0,false, true, 0,"R_SPARC_GOT13", false,0,0x00001fff,false),
- HOWTO(R_SPARC_GOT22, 10,2,22,false,0,false, true, 0,"R_SPARC_GOT22", false,0,0x003fffff,false),
- HOWTO(R_SPARC_PC10, 0,1,10,false,0,true, true, 0,"R_SPARC_PC10", false,0,0x000003ff,false),
- HOWTO(R_SPARC_PC22, 0,2,22,false,0,true, true, 0,"R_SPARC_PC22", false,0,0x003fffff,false),
- HOWTO(R_SPARC_WPLT30, 0,0,00,false,0,false,false, 0,"R_SPARC_WPLT30", false,0,0x00000000,false),
- HOWTO(R_SPARC_COPY, 0,0,00,false,0,false,false, 0,"R_SPARC_COPY", false,0,0x00000000,false),
- HOWTO(R_SPARC_GLOB_DAT,0,0,00,false,0,false,false,0,"R_SPARC_GLOB_DAT",false,0,0x00000000,false),
- HOWTO(R_SPARC_JMP_SLOT,0,0,00,false,0,false,false,0,"R_SPARC_JMP_SLOT",false,0,0x00000000,false),
- HOWTO(R_SPARC_RELATIVE,0,0,00,false,0,false,false,0,"R_SPARC_RELATIVE",false,0,0x00000000,false),
- HOWTO(R_SPARC_UA32, 0,0,00,false,0,false,false,0,"R_SPARC_UA32", false,0,0x00000000,false),
-};
-
-#if 0
-static const reloc_howto_type elf_386_howto_table[] =
-{
- HOWTO (R_386_NONE, 0, 0, 0, false, 0,
-#endif
-
-static void
-DEFUN(elf_info_to_howto, (abfd, cache_ptr, dst),
- bfd *abfd AND
- arelent *cache_ptr AND
- Elf_Internal_Rela *dst)
-{
- /* FIXME!!! just doing sparc for now... */
- switch (abfd->arch_info->arch)
- {
- case bfd_arch_sparc:
- BFD_ASSERT (ELF_R_TYPE(dst->r_info) < (unsigned char) R_SPARC_max);
- cache_ptr->howto = &elf_sparc_howto_table[ELF_R_TYPE(dst->r_info)];
- break;
-
-#if 0
- case bfd_arch_i386:
- BFD_ASSER (ELF_R_TYPE (dst->r_info) < R_386_max);
- cache_ptr->howto = &elf_i386_howto_table[ELF_R_TYPE (dst->r_info)];
- break;
-#endif
-
- default:
- fprintf (stderr, "elf_info_to_howto not implemented\n");
- abort ();
- }
-}
-
-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 */
- elf_info_to_howto(abfd, cache_ptr, &dst);
-#endif
- }
-
- asect->relocation = reloc_cache;
- return true;
-}
-
-
-static 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;
-}
-
-static 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));
-}
-
-static 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);
- }
-}
-
-static 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;
- }
-
-}
-
-static 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);
-}
-
-static 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;
- }
-}
-
-static 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);
-}
-
-static 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;
-}
-
-\f
-/* This structure contains everything that BFD knows about a target.
- It includes things like its byte order, name, what routines to call
- to do various operations, etc. Every BFD points to a target structure
- with its "xvec" member.
-
- There are two such structures here: one for big-endian machines and
- one for little-endian machines. */
-
-/* Archives are generic or unimplemented. */
-#define elf_slurp_armap bfd_slurp_coff_armap
-#define elf_slurp_extended_name_table _bfd_slurp_extended_name_table
-#define elf_truncate_arname bfd_dont_truncate_arname
-#define elf_openr_next_archived_file bfd_generic_openr_next_archived_file
-#define elf_generic_stat_arch_elt bfd_generic_stat_arch_elt
-#define elf_write_armap coff_write_armap
-
-/* Ordinary section reading and writing */
-#define elf_new_section_hook _bfd_dummy_new_section_hook
-#define elf_get_section_contents bfd_generic_get_section_contents
-/* #define elf_set_section_contents bfd_generic_set_section_contents */
-#define elf_close_and_cleanup bfd_generic_close_and_cleanup
-
-#define elf_bfd_debug_info_start bfd_void
-#define elf_bfd_debug_info_end bfd_void
-#define elf_bfd_debug_info_accumulate (PROTO(void,(*),(bfd*, struct sec *))) bfd_void
-#define elf_bfd_get_relocated_section_contents \
- bfd_generic_get_relocated_section_contents
-#define elf_bfd_relax_section bfd_generic_relax_section
-#define elf_bfd_seclet_link bfd_generic_seclet_link
-#define elf_bfd_reloc_type_lookup \
- ((CONST struct reloc_howto_struct *(*) PARAMS ((bfd *, bfd_reloc_code_real_type))) bfd_nullvoidptr)
-#define elf_bfd_make_debug_symbol \
- ((asymbol *(*) PARAMS ((bfd *, void *, unsigned long))) bfd_nullvoidptr)
-
-bfd_target elf_big_vec =
-{
- /* name: identify kind of target */
- "elf-big",
-
- /* flavour: general indication about file */
- bfd_target_elf_flavour,
-
- /* byteorder_big_p: data is big endian */
- true,
-
- /* header_byteorder_big_p: header is also big endian */
- true,
-
- /* object_flags: mask of all file flags */
- (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS |
- DYNAMIC | WP_TEXT),
-
- /* section_flags: mask of all section flags */
- (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY |
- SEC_CODE | SEC_DATA),
-
- /* leading_symbol_char: is the first char of a user symbol
- predictable, and if so what is it */
- 0,
-
- /* ar_pad_char: pad character for filenames within an archive header
- FIXME: this really has nothing to do with ELF, this is a characteristic
- of the archiver and/or os and should be independently tunable */
- '/',
-
- /* ar_max_namelen: maximum number of characters in an archive header
- FIXME: this really has nothing to do with ELF, this is a characteristic
- of the archiver and should be independently tunable. This value is
- a WAG (wild a** guess) */
- 15,
-
- /* align_power_min: minimum alignment restriction for any section
- FIXME: this value may be target machine dependent */
- 3,
-
- /* Routines to byte-swap various sized integers from the data sections */
- _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16,
-
- /* Routines to byte-swap various sized integers from the file headers */
- _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16,
-
- /* bfd_check_format: check the format of a file being read */
- { _bfd_dummy_target, /* unknown format */
- elf_object_p, /* assembler/linker output (object file) */
- bfd_generic_archive_p, /* an archive */
- elf_core_file_p /* a core file */
- },
-
- /* bfd_set_format: set the format of a file being written */
- { bfd_false,
- elf_mkobject,
- _bfd_generic_mkarchive,
- bfd_false
- },
-
- /* bfd_write_contents: write cached information into a file being written */
- { bfd_false,
- elf_write_object_contents,
- _bfd_write_archive_contents,
- bfd_false
- },
-
- /* Initialize a jump table with the standard macro. All names start with
- "elf" */
- JUMP_TABLE(elf),
-
- /* backend_data: */
- NULL
-};
-
-bfd_target elf_little_vec =
-{
- /* name: identify kind of target */
- "elf-little",
-
- /* flavour: general indication about file */
- bfd_target_elf_flavour,
-
- /* byteorder_big_p: data is big endian */
- false, /* Nope -- this one's little endian */
-
- /* header_byteorder_big_p: header is also big endian */
- false, /* Nope -- this one's little endian */
-
- /* object_flags: mask of all file flags */
- (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS |
- DYNAMIC | WP_TEXT),
-
- /* section_flags: mask of all section flags */
- (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY |
- SEC_DATA),
-
- /* leading_symbol_char: is the first char of a user symbol
- predictable, and if so what is it */
- 0,
-
- /* ar_pad_char: pad character for filenames within an archive header
- FIXME: this really has nothing to do with ELF, this is a characteristic
- of the archiver and/or os and should be independently tunable */
- '/',
-
- /* ar_max_namelen: maximum number of characters in an archive header
- FIXME: this really has nothing to do with ELF, this is a characteristic
- of the archiver and should be independently tunable. This value is
- a WAG (wild a** guess) */
- 15,
-
- /* align_power_min: minimum alignment restriction for any section
- FIXME: this value may be target machine dependent */
- 3,
-
- /* Routines to byte-swap various sized integers from the data sections */
- _do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16,
-
- /* Routines to byte-swap various sized integers from the file headers */
- _do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16,
-
- /* bfd_check_format: check the format of a file being read */
- { _bfd_dummy_target, /* unknown format */
- elf_object_p, /* assembler/linker output (object file) */
- bfd_generic_archive_p, /* an archive */
- elf_core_file_p /* a core file */
- },
-
- /* bfd_set_format: set the format of a file being written */
- { bfd_false,
- elf_mkobject,
- _bfd_generic_mkarchive,
- bfd_false
- },
-
- /* bfd_write_contents: write cached information into a file being written */
- { bfd_false,
- elf_write_object_contents,
- _bfd_write_archive_contents,
- bfd_false
- },
-
- /* Initialize a jump table with the standard macro. All names start with
- "elf" */
- JUMP_TABLE(elf),
-
- /* backend_data: */
- NULL
-};
projects / binutils-gdb.git / commitdiff