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libc/include/elf/external.h
Alan Modra 674310fb40 include/elf/ 
PR 5900
	* common.h (SHN_BAD): Delete.
	(SHN_LORESERVE .. SHN_HIRESERVE): Move to..
	* external.h: ..here.
	* internal.h (SHN_LORESERVE, SHN_HIRESERVE): Define.
	(SHN_LOPROC, SHN_HIPROC, SHN_LOOS, SHN_HIOS): Define.
	(SHN_ABS, SHN_COMMON, SHN_XINDEX, SHN_BAD): Define.
bfd/
	PR 5900
	* elf-bfd.h: Include elf/internal.h after elf/external.h.
	* elfcode.h (elf_swap_symbol_in): Map reserved shndx range.
	(elf_swap_symbol_out): Adjust SHN_XINDEX test.
	(elf_swap_ehdr_out): Mask SHN_LORESERVE and SHN_XINDEX to values
	seen in external structs.
	(valid_section_index_p): Delete.
	(elf_object_p): Don't increment section numbers over reserved range.
	Simplify test for valid sh_link, sh_info and e_shstrndx fields.
	(elf_write_shdrs_and_ehdr): Mask SHN_LORESERVE and SHN_XINDEX to values
	seen in external structs.  Don't increment section numbers over
	reserved range.
	* elf.c (bfd_elf_sym_name): Remove redundant tests on st_shndx.
	(bfd_section_from_shdr): Likewise.
	(group_signature): Range check before accessing elf_elfsections.
	(_bfd_elf_setup_sections): Likewise.
	(bfd_section_from_shdr): Likewise.
	(bfd_section_from_shdr): Don't increment section number over
	reserved sections.
	(assign_file_positions_for_non_load_sections): Likewise.
	(assign_file_positions_except_relocs): Likewise.
	(_bfd_elf_write_object_contents): Likewise.
	(assign_section_numbers): Likewise.  Adjust for changed SHN_*.
	(prep_headers): Delete unused variable.
	* elflink.c (bfd_elf_link_record_local_dynamic_symbol): Adjust
	for changed SHN_* values.
	(check_dynsym, elf_link_input_bfd): Likewise.
	(bfd_elf_final_link): Likewise.  Don't skip over reserved section
	range.
	(elf_fixup_link_order): Check that sh_link field is valid.
	* elf-hppa.h (elf_hppa_add_symbol_hook): Make "index" unsigned.
	* elf32-arm.c (elf32_arm_gc_mark_extra_sections): Range check before
	accesssing elf_elfsections.
	* elf32-avr.c (elf32_avr_size_stubs): Likewise.
	* elf32-hppa.c (elf32_hppa_size_stubs): Likewise.
	* elf32-m68hc1x.c (elf32_m68hc11_size_stubs): Likewise.
	* elf64-hppa.c (elf64_hppa_check_relocs): Adjust for changed
	SHN_* defines.  Test for SHN_BAD return from
	_bfd_elf_section_from_bfd_section
binutils/
	PR 5900
	* readelf.c (SECTION_HEADER_INDEX, SECTION_HEADER_NUM): Delete.
	Remove use throughout file.
	(SECTION_HEADER): Likewise.
	(dump_relocations): Don't adjust st_shndx for reserved range.
	(process_file_header): Mask SHN_XINDEX to values seen in external
	elf structs.  Simplify valid section index tests.
	(get_32bit_elf_symbols, get_64bit_elf_symbols): Mask SHN_XINDEX.
	Map reserved st_shndx to internal form.
	(process_section_groups): Test that group symbol st_shndx is in
	range, not just non-zero.  Delete reserved range check.
	(get_symbol_index_type): Mask "type" to 16 bits when printing PRC,
	OS or RSV.
gdb/
	PR 5900
	* elfread.c (elf_symtab_read): Make shndx an unsigned int.
	* mipsread.c: Include elf/internal.h.
	(read_alphacoff_dynamic_symtab): Map external reserved sym_shndx
	to internal range.
ld/testsuite/
	PR 5900
	* ld-elf/sec64k.exp: Update.
2008-03-12 08:36:58 +00:00

289 lines
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/* ELF support for BFD.
Copyright 1991, 1992, 1993, 1995, 1997, 1998, 1999, 2001, 2003, 2005,
2008 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".
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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
/* This file is part of ELF support for BFD, and contains the portions
that describe how ELF is represented externally by the BFD library.
I.E. it describes the in-file representation of ELF. It requires
the elf/common.h file which contains the portions that are common to
both the internal and external representations. */
/* The 64-bit stuff is kind of random. Perhaps someone will publish a
spec someday. */
#ifndef _ELF_EXTERNAL_H
#define _ELF_EXTERNAL_H
/* Special section indices, which may show up in st_shndx fields, among
other places. */
#define SHN_LORESERVE 0xFF00 /* Begin range of reserved indices */
#define SHN_LOPROC 0xFF00 /* Begin range of appl-specific */
#define SHN_HIPROC 0xFF1F /* End range of appl-specific */
#define SHN_LOOS 0xFF20 /* OS specific semantics, lo */
#define SHN_HIOS 0xFF3F /* OS specific semantics, hi */
#define SHN_ABS 0xFFF1 /* Associated symbol is absolute */
#define SHN_COMMON 0xFFF2 /* Associated symbol is in common */
#define SHN_XINDEX 0xFFFF /* Section index is held elsewhere */
#define SHN_HIRESERVE 0xFFFF /* End range of reserved indices */
/* ELF Header (32-bit implementations) */
typedef struct {
unsigned char e_ident[16]; /* ELF "magic number" */
unsigned char e_type[2]; /* Identifies object file type */
unsigned char e_machine[2]; /* Specifies required architecture */
unsigned char e_version[4]; /* Identifies object file version */
unsigned char e_entry[4]; /* Entry point virtual address */
unsigned char e_phoff[4]; /* Program header table file offset */
unsigned char e_shoff[4]; /* Section header table file offset */
unsigned char e_flags[4]; /* Processor-specific flags */
unsigned char e_ehsize[2]; /* ELF header size in bytes */
unsigned char e_phentsize[2]; /* Program header table entry size */
unsigned char e_phnum[2]; /* Program header table entry count */
unsigned char e_shentsize[2]; /* Section header table entry size */
unsigned char e_shnum[2]; /* Section header table entry count */
unsigned char e_shstrndx[2]; /* Section header string table index */
} Elf32_External_Ehdr;
typedef struct {
unsigned char e_ident[16]; /* ELF "magic number" */
unsigned char e_type[2]; /* Identifies object file type */
unsigned char e_machine[2]; /* Specifies required architecture */
unsigned char e_version[4]; /* Identifies object file version */
unsigned char e_entry[8]; /* Entry point virtual address */
unsigned char e_phoff[8]; /* Program header table file offset */
unsigned char e_shoff[8]; /* Section header table file offset */
unsigned char e_flags[4]; /* Processor-specific flags */
unsigned char e_ehsize[2]; /* ELF header size in bytes */
unsigned char e_phentsize[2]; /* Program header table entry size */
unsigned char e_phnum[2]; /* Program header table entry count */
unsigned char e_shentsize[2]; /* Section header table entry size */
unsigned char e_shnum[2]; /* Section header table entry count */
unsigned char e_shstrndx[2]; /* Section header string table index */
} Elf64_External_Ehdr;
/* Program header */
typedef struct {
unsigned char p_type[4]; /* Identifies program segment type */
unsigned char p_offset[4]; /* Segment file offset */
unsigned char p_vaddr[4]; /* Segment virtual address */
unsigned char p_paddr[4]; /* Segment physical address */
unsigned char p_filesz[4]; /* Segment size in file */
unsigned char p_memsz[4]; /* Segment size in memory */
unsigned char p_flags[4]; /* Segment flags */
unsigned char p_align[4]; /* Segment alignment, file & memory */
} Elf32_External_Phdr;
typedef struct {
unsigned char p_type[4]; /* Identifies program segment type */
unsigned char p_flags[4]; /* Segment flags */
unsigned char p_offset[8]; /* Segment file offset */
unsigned char p_vaddr[8]; /* Segment virtual address */
unsigned char p_paddr[8]; /* Segment physical address */
unsigned char p_filesz[8]; /* Segment size in file */
unsigned char p_memsz[8]; /* Segment size in memory */
unsigned char p_align[8]; /* Segment alignment, file & memory */
} Elf64_External_Phdr;
/* Section header */
typedef struct {
unsigned char sh_name[4]; /* Section name, index in string tbl */
unsigned char sh_type[4]; /* Type of section */
unsigned char sh_flags[4]; /* Miscellaneous section attributes */
unsigned char sh_addr[4]; /* Section virtual addr at execution */
unsigned char sh_offset[4]; /* Section file offset */
unsigned char sh_size[4]; /* Size of section in bytes */
unsigned char sh_link[4]; /* Index of another section */
unsigned char sh_info[4]; /* Additional section information */
unsigned char sh_addralign[4]; /* Section alignment */
unsigned char sh_entsize[4]; /* Entry size if section holds table */
} Elf32_External_Shdr;
typedef struct {
unsigned char sh_name[4]; /* Section name, index in string tbl */
unsigned char sh_type[4]; /* Type of section */
unsigned char sh_flags[8]; /* Miscellaneous section attributes */
unsigned char sh_addr[8]; /* Section virtual addr at execution */
unsigned char sh_offset[8]; /* Section file offset */
unsigned char sh_size[8]; /* Size of section in bytes */
unsigned char sh_link[4]; /* Index of another section */
unsigned char sh_info[4]; /* Additional section information */
unsigned char sh_addralign[8]; /* Section alignment */
unsigned char sh_entsize[8]; /* Entry size if section holds table */
} Elf64_External_Shdr;
/* Symbol table entry */
typedef struct {
unsigned char st_name[4]; /* Symbol name, index in string tbl */
unsigned char st_value[4]; /* Value of the symbol */
unsigned char st_size[4]; /* Associated symbol size */
unsigned char st_info[1]; /* Type and binding attributes */
unsigned char st_other[1]; /* No defined meaning, 0 */
unsigned char st_shndx[2]; /* Associated section index */
} Elf32_External_Sym;
typedef struct {
unsigned char st_name[4]; /* Symbol name, index in string tbl */
unsigned char st_info[1]; /* Type and binding attributes */
unsigned char st_other[1]; /* No defined meaning, 0 */
unsigned char st_shndx[2]; /* Associated section index */
unsigned char st_value[8]; /* Value of the symbol */
unsigned char st_size[8]; /* Associated symbol size */
} Elf64_External_Sym;
typedef struct {
unsigned char est_shndx[4]; /* Section index */
} Elf_External_Sym_Shndx;
/* Note segments */
typedef struct {
unsigned char namesz[4]; /* Size of entry's owner string */
unsigned char descsz[4]; /* Size of the note descriptor */
unsigned char type[4]; /* Interpretation of the descriptor */
char name[1]; /* Start of the name+desc data */
} Elf_External_Note;
/* Relocation Entries */
typedef struct {
unsigned char r_offset[4]; /* Location at which to apply the action */
unsigned char r_info[4]; /* index and type of relocation */
} Elf32_External_Rel;
typedef struct {
unsigned char r_offset[4]; /* Location at which to apply the action */
unsigned char r_info[4]; /* index and type of relocation */
unsigned char r_addend[4]; /* Constant addend used to compute value */
} Elf32_External_Rela;
typedef struct {
unsigned char r_offset[8]; /* Location at which to apply the action */
unsigned char r_info[8]; /* index and type of relocation */
} Elf64_External_Rel;
typedef struct {
unsigned char r_offset[8]; /* Location at which to apply the action */
unsigned char r_info[8]; /* index and type of relocation */
unsigned char r_addend[8]; /* Constant addend used to compute value */
} Elf64_External_Rela;
/* dynamic section structure */
typedef struct {
unsigned char d_tag[4]; /* entry tag value */
union {
unsigned char d_val[4];
unsigned char d_ptr[4];
} d_un;
} Elf32_External_Dyn;
typedef struct {
unsigned char d_tag[8]; /* entry tag value */
union {
unsigned char d_val[8];
unsigned char d_ptr[8];
} d_un;
} Elf64_External_Dyn;
/* The version structures are currently size independent. They are
named without a 32 or 64. If that ever changes, these structures
will need to be renamed. */
/* This structure appears in a SHT_GNU_verdef section. */
typedef struct {
unsigned char vd_version[2];
unsigned char vd_flags[2];
unsigned char vd_ndx[2];
unsigned char vd_cnt[2];
unsigned char vd_hash[4];
unsigned char vd_aux[4];
unsigned char vd_next[4];
} Elf_External_Verdef;
/* This structure appears in a SHT_GNU_verdef section. */
typedef struct {
unsigned char vda_name[4];
unsigned char vda_next[4];
} Elf_External_Verdaux;
/* This structure appears in a SHT_GNU_verneed section. */
typedef struct {
unsigned char vn_version[2];
unsigned char vn_cnt[2];
unsigned char vn_file[4];
unsigned char vn_aux[4];
unsigned char vn_next[4];
} Elf_External_Verneed;
/* This structure appears in a SHT_GNU_verneed section. */
typedef struct {
unsigned char vna_hash[4];
unsigned char vna_flags[2];
unsigned char vna_other[2];
unsigned char vna_name[4];
unsigned char vna_next[4];
} Elf_External_Vernaux;
/* This structure appears in a SHT_GNU_versym section. This is not a
standard ELF structure; ELF just uses Elf32_Half. */
typedef struct {
unsigned char vs_vers[2];
} ATTRIBUTE_PACKED Elf_External_Versym;
/* Structure for syminfo section. */
typedef struct
{
unsigned char si_boundto[2];
unsigned char si_flags[2];
} Elf_External_Syminfo;
/* This structure appears on the stack and in NT_AUXV core file notes. */
typedef struct
{
unsigned char a_type[4];
unsigned char a_val[4];
} Elf32_External_Auxv;
typedef struct
{
unsigned char a_type[8];
unsigned char a_val[8];
} Elf64_External_Auxv;
/* Size of SHT_GROUP section entry. */
#define GRP_ENTRY_SIZE 4
#endif /* _ELF_EXTERNAL_H */
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