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information, and to write some of out directly rather than saving it in memory. Several new functions and structures, and new arguments to existing functions. * ecoff.c (ecoff_compute_reloc_file_positions): Compute sym_filepos as well. (ecoff_get_extr): Use ifdmap instead of ifdbase. (ecoff_write_object_contents): Don't compute sym_filepos here. Only output symbols if outsymbols is not NULL. (ecoff_bfd_final_link): Adjust for changes in ecoff_debug_info and bfd_ecoff_debug functions. Write out debugging information here. (ecoff_final_link_debug_accumulate): Adjust for changes in bfd_ecoff_debug functions. (ecoff_link_write_external): Use ifdmap rather than ifdbase. * elf32-mips.c (mips_elf_read_ecoff_info): Read external symbols first, to put them in the first memory buffer. Clear fdr field. (mips_elf_get_extr): Use pointer to unswapped external symbol. (mips_elf_final_link): Adjust for changes in bfd_ecoff functions. Preserve .text, .data and .bss even if they are empty. Save pointer to unswapped external symbol rather than copying it. Don't free up the external symbols. * libelf.h (elf_symbol_type): Change mips_extr to PTR. * bfd-in.h (bfd_ecoff_debug_init, bfd_ecoff_debug_free): Declare. (bfd_ecoff_debug_accumulate): Update declaration. (bfd_ecoff_debug_accumulate_other): Rename declaration from bfd_ecoff_debug_link_other and update. (bfd_ecoff_write_accumulated_debug): Declare. * bfd-in2.h: Rebuilt. * Makefile.in: Rebuilt dependencies.
326 lines
12 KiB
C
326 lines
12 KiB
C
/* BFD back-end data structures for ELF files.
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Copyright (C) 1992, 1993 Free Software Foundation, Inc.
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Written by Cygnus Support.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#ifndef _LIBELF_H_
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#define _LIBELF_H_ 1
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#include "elf/common.h"
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#include "elf/internal.h"
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#include "elf/external.h"
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/* If size isn't specified as 64 or 32, NAME macro should fail. */
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#ifndef NAME
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#if ARCH_SIZE==64
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#define NAME(x,y) CAT4(x,64,_,y)
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#endif
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#if ARCH_SIZE==32
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#define NAME(x,y) CAT4(x,32,_,y)
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#endif
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#endif
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#ifndef NAME
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#define NAME(x,y) CAT4(x,NOSIZE,_,y)
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#endif
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#define ElfNAME(X) NAME(Elf,X)
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#define elfNAME(X) NAME(elf,X)
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/* Information held for an ELF symbol. The first field is the
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corresponding asymbol. Every symbol is an ELF file is actually a
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pointer to this structure, although it is often handled as a
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pointer to an asymbol. */
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typedef struct
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{
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/* The BFD symbol. */
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asymbol symbol;
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/* ELF symbol information. */
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Elf_Internal_Sym internal_elf_sym;
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/* Backend specific information. */
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union
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{
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unsigned int hppa_arg_reloc;
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PTR mips_extr;
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PTR any;
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}
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tc_data;
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} elf_symbol_type;
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/* Constant information held for an ELF backend. */
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struct elf_backend_data
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{
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/* Whether the backend uses REL or RELA relocations. FIXME: some
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ELF backends use both. When we need to support one, this whole
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approach will need to be changed. */
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int use_rela_p;
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/* Whether this backend is 64 bits or not. FIXME: Who cares? */
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int elf_64_p;
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/* The architecture for this backend. */
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enum bfd_architecture arch;
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/* The ELF machine code (EM_xxxx) for this backend. */
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int elf_machine_code;
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/* The maximum page size for this backend. */
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bfd_vma maxpagesize;
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/* A function to translate an ELF RELA relocation to a BFD arelent
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structure. */
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void (*elf_info_to_howto) PARAMS ((bfd *, arelent *,
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Elf_Internal_Rela *));
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/* A function to translate an ELF REL relocation to a BFD arelent
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structure. */
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void (*elf_info_to_howto_rel) PARAMS ((bfd *, arelent *,
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Elf_Internal_Rel *));
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/* A function to determine whether a symbol is global when
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partitioning the symbol table into local and global symbols.
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This should be NULL for most targets, in which case the correct
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thing will be done. MIPS ELF, at least on the Irix 5, has
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special requirements. */
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boolean (*elf_backend_sym_is_global) PARAMS ((bfd *, asymbol *));
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/* The remaining functions are hooks which are called only if they
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are not NULL. */
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/* A function to permit a backend specific check on whether a
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particular BFD format is relevant for an object file, and to
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permit the backend to set any global information it wishes. When
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this is called elf_elfheader is set, but anything else should be
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used with caution. If this returns false, the check_format
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routine will return a wrong_format error. */
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boolean (*elf_backend_object_p) PARAMS ((bfd *));
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/* A function to do additional symbol processing when reading the
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ELF symbol table. This is where any processor-specific special
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section indices are handled. */
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void (*elf_backend_symbol_processing) PARAMS ((bfd *, asymbol *));
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/* A function to do additional symbol processing after reading the
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entire ELF symbol table. */
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boolean (*elf_backend_symbol_table_processing) PARAMS ((bfd *,
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elf_symbol_type *,
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int));
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/* A function to do additional processing on the ELF section header
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just before writing it out. This is used to set the flags and
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type fields for some sections, or to actually write out data for
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unusual sections. */
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boolean (*elf_backend_section_processing) PARAMS ((bfd *,
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Elf32_Internal_Shdr *));
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/* A function to handle unusual section types when creating BFD
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sections from ELF sections. */
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boolean (*elf_backend_section_from_shdr) PARAMS ((bfd *,
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Elf32_Internal_Shdr *,
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char *));
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/* A function to set up the ELF section header for a BFD section in
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preparation for writing it out. This is where the flags and type
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fields are set for unusual sections. */
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boolean (*elf_backend_fake_sections) PARAMS ((bfd *, Elf32_Internal_Shdr *,
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asection *));
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/* A function to get the ELF section index for a BFD section. If
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this returns true, the section was found. If it is a normal ELF
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section, *RETVAL should be left unchanged. If it is not a normal
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ELF section *RETVAL should be set to the SHN_xxxx index. */
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boolean (*elf_backend_section_from_bfd_section)
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PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *, int *retval));
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/* A function to do any final processing needed for the ELF file
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before writing it out. */
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void (*elf_backend_final_write_processing) PARAMS ((bfd *));
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/* The swapping table to use when dealing with ECOFF information.
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Used for the MIPS ELF .mdebug section. */
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const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap;
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};
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struct elf_sym_extra
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{
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int elf_sym_num; /* sym# after locals/globals are reordered */
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};
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typedef struct elf_sym_extra Elf_Sym_Extra;
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struct bfd_elf_section_data {
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Elf_Internal_Shdr this_hdr;
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Elf_Internal_Shdr rel_hdr;
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int this_idx, rel_idx;
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};
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#define elf_section_data(sec) ((struct bfd_elf_section_data*)sec->used_by_bfd)
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#define shdr_name(abfd,shdr) (elf_shstrtab (abfd)->tab + (shdr)->sh_name)
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#define get_elf_backend_data(abfd) \
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((struct elf_backend_data *) (abfd)->xvec->backend_data)
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struct strtab
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{
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char *tab;
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int nentries;
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int length;
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};
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/* Some private data is stashed away for future use using the tdata pointer
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in the bfd structure. */
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struct elf_obj_tdata
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{
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Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */
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Elf_Internal_Shdr **elf_sect_ptr;
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Elf_Internal_Phdr *phdr;
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struct strtab *strtab_ptr;
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int num_locals;
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int num_globals;
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Elf_Internal_Sym *internal_syms;
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elf_symbol_type *symbols; /* elf_symbol_type */
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Elf_Sym_Extra *sym_extra;
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asymbol **section_syms; /* STT_SECTION symbols for each section */
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int num_section_syms; /* number of section_syms allocated */
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Elf_Internal_Shdr symtab_hdr;
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Elf_Internal_Shdr shstrtab_hdr;
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Elf_Internal_Shdr strtab_hdr;
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int symtab_section, shstrtab_section, strtab_section;
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file_ptr next_file_pos;
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void *prstatus; /* The raw /proc prstatus structure */
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void *prpsinfo; /* The raw /proc prpsinfo structure */
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bfd_vma gp; /* The gp value (MIPS only, for now) */
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int gp_size; /* The gp size (MIPS only, for now) */
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};
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#define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
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#define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
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#define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
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#define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr)
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#define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
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#define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals)
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#define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals)
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#define elf_sym_extra(bfd) (elf_tdata(bfd) -> sym_extra)
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#define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms)
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#define elf_num_section_syms(bfd) (elf_tdata(bfd) -> num_section_syms)
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#define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
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#define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
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#define obj_symbols(bfd) (elf_tdata(bfd) -> symbols)
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#define obj_internal_syms(bfd) (elf_tdata(bfd) -> internal_syms)
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#define elf_gp(bfd) (elf_tdata(bfd) -> gp)
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#define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
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extern char * elf_string_from_elf_section PARAMS ((bfd *, unsigned, unsigned));
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extern char * elf_get_str_section PARAMS ((bfd *, unsigned));
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#define bfd_elf32_mkobject bfd_elf_mkobject
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#define bfd_elf64_mkobject bfd_elf_mkobject
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#define elf_mkobject bfd_elf_mkobject
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extern unsigned long bfd_elf_hash PARAMS ((CONST unsigned char *));
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extern bfd_reloc_status_type bfd_elf_generic_reloc PARAMS ((bfd *,
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arelent *,
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asymbol *,
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PTR,
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asection *,
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bfd *,
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char **));
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extern boolean bfd_elf_mkobject PARAMS ((bfd *));
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extern Elf_Internal_Shdr *bfd_elf_find_section PARAMS ((bfd *, char *));
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extern boolean bfd_elf32_write_object_contents PARAMS ((bfd *));
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extern boolean bfd_elf64_write_object_contents PARAMS ((bfd *));
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extern bfd_target *bfd_elf32_object_p PARAMS ((bfd *));
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extern bfd_target *bfd_elf32_core_file_p PARAMS ((bfd *));
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extern char *bfd_elf32_core_file_failing_command PARAMS ((bfd *));
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extern int bfd_elf32_core_file_failing_signal PARAMS ((bfd *));
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extern boolean bfd_elf32_core_file_matches_executable_p PARAMS ((bfd *,
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bfd *));
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extern boolean bfd_elf32_set_section_contents PARAMS ((bfd *, sec_ptr, PTR,
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file_ptr,
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bfd_size_type));
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extern unsigned int bfd_elf32_get_symtab_upper_bound PARAMS ((bfd *));
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extern unsigned int bfd_elf32_get_symtab PARAMS ((bfd *, asymbol **));
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extern unsigned int bfd_elf32_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
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extern unsigned int bfd_elf32_canonicalize_reloc PARAMS ((bfd *, sec_ptr,
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arelent **,
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asymbol **));
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extern asymbol *bfd_elf32_make_empty_symbol PARAMS ((bfd *));
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extern void bfd_elf32_print_symbol PARAMS ((bfd *, PTR, asymbol *,
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bfd_print_symbol_type));
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extern void bfd_elf32_get_symbol_info PARAMS ((bfd *, asymbol *,
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symbol_info *));
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extern alent *bfd_elf32_get_lineno PARAMS ((bfd *, asymbol *));
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extern boolean bfd_elf32_set_arch_mach PARAMS ((bfd *, enum bfd_architecture,
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unsigned long));
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extern boolean bfd_elf32_find_nearest_line PARAMS ((bfd *, asection *,
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asymbol **,
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bfd_vma, CONST char **,
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CONST char **,
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unsigned int *));
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extern int bfd_elf32_sizeof_headers PARAMS ((bfd *, boolean));
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extern void bfd_elf32__write_relocs PARAMS ((bfd *, asection *, PTR));
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extern boolean bfd_elf32_new_section_hook PARAMS ((bfd *, asection *));
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/* If the target doesn't have reloc handling written yet: */
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extern void bfd_elf32_no_info_to_howto PARAMS ((bfd *, arelent *,
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Elf32_Internal_Rela *));
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extern bfd_target *bfd_elf64_object_p PARAMS ((bfd *));
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extern bfd_target *bfd_elf64_core_file_p PARAMS ((bfd *));
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extern char *bfd_elf64_core_file_failing_command PARAMS ((bfd *));
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extern int bfd_elf64_core_file_failing_signal PARAMS ((bfd *));
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extern boolean bfd_elf64_core_file_matches_executable_p PARAMS ((bfd *,
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bfd *));
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extern boolean bfd_elf64_set_section_contents PARAMS ((bfd *, sec_ptr, PTR,
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file_ptr,
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bfd_size_type));
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extern unsigned int bfd_elf64_get_symtab_upper_bound PARAMS ((bfd *));
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extern unsigned int bfd_elf64_get_symtab PARAMS ((bfd *, asymbol **));
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extern unsigned int bfd_elf64_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
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extern unsigned int bfd_elf64_canonicalize_reloc PARAMS ((bfd *, sec_ptr,
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arelent **,
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asymbol **));
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extern asymbol *bfd_elf64_make_empty_symbol PARAMS ((bfd *));
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extern void bfd_elf64_print_symbol PARAMS ((bfd *, PTR, asymbol *,
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bfd_print_symbol_type));
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extern void bfd_elf64_get_symbol_info PARAMS ((bfd *, asymbol *,
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symbol_info *));
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extern alent *bfd_elf64_get_lineno PARAMS ((bfd *, asymbol *));
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extern boolean bfd_elf64_set_arch_mach PARAMS ((bfd *, enum bfd_architecture,
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unsigned long));
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extern boolean bfd_elf64_find_nearest_line PARAMS ((bfd *, asection *,
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asymbol **,
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bfd_vma, CONST char **,
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CONST char **,
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unsigned int *));
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extern int bfd_elf64_sizeof_headers PARAMS ((bfd *, boolean));
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extern void bfd_elf64__write_relocs PARAMS ((bfd *, asection *, PTR));
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extern boolean bfd_elf64_new_section_hook PARAMS ((bfd *, asection *));
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/* If the target doesn't have reloc handling written yet: */
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extern void bfd_elf64_no_info_to_howto PARAMS ((bfd *, arelent *,
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Elf64_Internal_Rela *));
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#endif /* _LIBELF_H_ */
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