newlib/include/elf/internal.h

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/* ELF support for BFD.
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Copyright 1991, 1992, 1993, 1994, 1995, 1997, 1998, 2000, 2001, 2002,
2003, 2006, 2007, 2008, 2010, 2011 Free Software Foundation, Inc.
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Written by Fred Fish @ Cygnus Support, from information published
in "UNIX System V Release 4, Programmers Guide: ANSI C and
Programming Support Tools".
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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
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
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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.
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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. */
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/* This file is part of ELF support for BFD, and contains the portions
that describe how ELF is represented internally in the BFD library.
I.E. it describes the in-memory representation of ELF. It requires
the elf-common.h file which contains the portions that are common to
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both the internal and external representations. */
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/* NOTE that these structures are not kept in the same order as they appear
in the object file. In some cases they've been reordered for more optimal
packing under various circumstances. */
#ifndef _ELF_INTERNAL_H
#define _ELF_INTERNAL_H
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.
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/* Special section indices, which may show up in st_shndx fields, among
other places. */
#undef SHN_UNDEF
#undef SHN_LORESERVE
#undef SHN_LOPROC
#undef SHN_HIPROC
#undef SHN_LOOS
#undef SHN_HIOS
#undef SHN_ABS
#undef SHN_COMMON
#undef SHN_XINDEX
#undef SHN_HIRESERVE
#define SHN_UNDEF 0 /* Undefined section reference */
#define SHN_LORESERVE (-0x100u) /* Begin range of reserved indices */
#define SHN_LOPROC (-0x100u) /* Begin range of appl-specific */
#define SHN_HIPROC (-0xE1u) /* End range of appl-specific */
#define SHN_LOOS (-0xE0u) /* OS specific semantics, lo */
#define SHN_HIOS (-0xC1u) /* OS specific semantics, hi */
#define SHN_ABS (-0xFu) /* Associated symbol is absolute */
#define SHN_COMMON (-0xEu) /* Associated symbol is in common */
#define SHN_XINDEX (-0x1u) /* Section index is held elsewhere */
#define SHN_HIRESERVE (-0x1u) /* End range of reserved indices */
#define SHN_BAD (-0x101u) /* Used internally by bfd */
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/* ELF Header */
#define EI_NIDENT 16 /* Size of e_ident[] */
typedef struct elf_internal_ehdr {
unsigned char e_ident[EI_NIDENT]; /* ELF "magic number" */
bfd_vma e_entry; /* Entry point virtual address */
bfd_size_type e_phoff; /* Program header table file offset */
bfd_size_type e_shoff; /* Section header table file offset */
unsigned long e_version; /* Identifies object file version */
unsigned long e_flags; /* Processor-specific flags */
unsigned short e_type; /* Identifies object file type */
unsigned short e_machine; /* Specifies required architecture */
unsigned int e_ehsize; /* ELF header size in bytes */
unsigned int e_phentsize; /* Program header table entry size */
unsigned int e_phnum; /* Program header table entry count */
unsigned int e_shentsize; /* Section header table entry size */
unsigned int e_shnum; /* Section header table entry count */
unsigned int e_shstrndx; /* Section header string table index */
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} Elf_Internal_Ehdr;
/* Program header */
struct elf_internal_phdr {
unsigned long p_type; /* Identifies program segment type */
unsigned long p_flags; /* Segment flags */
bfd_vma p_offset; /* Segment file offset */
bfd_vma p_vaddr; /* Segment virtual address */
bfd_vma p_paddr; /* Segment physical address */
bfd_vma p_filesz; /* Segment size in file */
bfd_vma p_memsz; /* Segment size in memory */
bfd_vma p_align; /* Segment alignment, file & memory */
};
typedef struct elf_internal_phdr Elf_Internal_Phdr;
/* Section header */
typedef struct elf_internal_shdr {
unsigned int sh_name; /* Section name, index in string tbl */
unsigned int sh_type; /* Type of section */
bfd_vma sh_flags; /* Miscellaneous section attributes */
bfd_vma sh_addr; /* Section virtual addr at execution */
file_ptr sh_offset; /* Section file offset */
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bfd_size_type sh_size; /* Size of section in bytes */
unsigned int sh_link; /* Index of another section */
unsigned int sh_info; /* Additional section information */
bfd_vma sh_addralign; /* Section alignment */
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bfd_size_type sh_entsize; /* Entry size if section holds table */
/* The internal rep also has some cached info associated with it. */
asection * bfd_section; /* Associated BFD section. */
unsigned char *contents; /* Section contents. */
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} Elf_Internal_Shdr;
/* Symbol table entry */
struct elf_internal_sym {
bfd_vma st_value; /* Value of the symbol */
bfd_vma st_size; /* Associated symbol size */
unsigned long st_name; /* Symbol name, index in string tbl */
unsigned char st_info; /* Type and binding attributes */
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unsigned char st_other; /* Visibilty, and target specific */
include/elf/ * internal.h (elf_internal_sym): Add st_target_internal. * arm.h (arm_st_branch_type): New enum. (ARM_SYM_BRANCH_TYPE): New macro. bfd/ * elf-bfd.h (elf_link_hash_entry): Add target_internal. * elf.c (swap_out_syms): Set st_target_internal for each Elf_Internal_Sym. * elfcode.h (elf_swap_symbol_in): Likewise. * elf32-i370.c (i370_elf_finish_dynamic_sections): Likewise. * elf32-sh-symbian.c (sh_symbian_relocate_section): Likewise. * elf64-sparc.c (elf64_sparc_output_arch_syms): Likewise. * elfxx-sparc.c (_bfd_sparc_elf_size_dynamic_sections): Likewise. * elflink.c (elf_link_output_extsym): Likewise. (bfd_elf_final_link): Likewise. (elf_link_add_object_symbols): Copy st_target_internal to the hash table if we see a definition. (_bfd_elf_copy_link_hash_symbol_type): Copy target_internal. * elf32-arm.c (elf32_arm_stub_hash_entry): Replace st_type with a branch_type field. (a8_erratum_fix, a8_erratum_reloc): Likewise. (arm_type_of_stub): Replace actual_st_type with an actual_branch_type parameter. (arm_build_one_stub): Use branch types rather than st_types to determine the type of branch. (cortex_a8_erratum_scan): Likewise. (elf32_arm_size_stubs): Likewise. (bfd_elf32_arm_process_before_allocation): Likewise. (allocate_dynrelocs_for_symbol): Likewise. (elf32_arm_finish_dynamic_sections): Likewise. (elf32_arm_final_link_relocate): Replace sym_flags parameter with a branch_type parameter. (elf32_arm_relocate_section): Update call accordingly. (elf32_arm_adjust_dynamic_symbol): Don't check STT_ARM_TFUNC. (elf32_arm_output_map_sym): Initialize st_target_internal. (elf32_arm_output_stub_sym): Likewise. (elf32_arm_symbol_processing): Delete. (elf32_arm_swap_symbol_in): Convert STT_ARM_TFUNCs into STT_FUNCs. Use st_target_internal to record the branch type. (elf32_arm_swap_symbol_out): Use st_target_internal to test for Thumb functions. (elf32_arm_is_function_type): Delete. (elf_backend_symbol_processing): Likewise. (elf_backend_is_function_type): Likewise. gas/ * config/tc-arm.c (arm_adjust_symtab): Set the branch type for Thumb symbols. ld/ * emultempl/armelf.em (gld${EMULATION_NAME}_finish): Check eh->target_internal. opcodes/ * arm-dis.c (get_sym_code_type): Don't check for STT_ARM_TFUNC. Use branch types instead. (print_insn): Likewise.
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unsigned char st_target_internal; /* Internal-only information */
Support for more than 64k ELF sections. include/elf/ChangeLog * external.h (Elf_External_Sym_Shndx): Declare. * internal.h (struct elf_internal_sym <st_shndx>): Make it an unsigned int. * common.h (SHN_BAD): Define. bfd/ChangeLog * configure.in: Bump bfd version. * configure: Regenerate. * elf-bfd.h (elf_size_info <swap_symbol_out>): Add shndx param. (bfd_elf32_swap_symbol_in): Likewise. (bfd_elf32_swap_symbol_out): Likewise. (bfd_elf64_swap_symbol_in): Likewise. (bfd_elf64_swap_symbol_out): Likewise. (elf_reloc_cookie): Add locsym_shndx field. Make locsyms a PTR. (elf_obj_tdata): Add num_elf_sections, symtab_shndx_hdr and symtab_shndx_section. (elf_numsections): Define. (elf_symtab_shndx): Define. * elf.c (setup_group): Use elf_numsections rather than header e_shnum. (bfd_elf_find_section): Likewise. (bfd_section_from_elf_index): Likewise. (bfd_section_from_shdr): Likewise. Handle SHT_SYMTAB_SHNDX. (bfd_section_from_r_symndx): Read symbol shndx extension, and translate st_shndx for > SHN_HIRESERVE. (assign_section_numbers): Skip reserved sections. Assign symtab_shndx_section and elf_numsections. Exclude reserved sections from e_shnum. Set up symtab_shndx_hdr. (_bfd_elf_compute_section_file_positions): Handle symtab_shndx_hdr. (map_sections_to_segments): Don't map eh_frame_hdr unless required. (assign_file_positions_except_relocs): Use elf_numsections rather than header e_shnum. Skip reserved sections and symtab_shndx_section. (prep_headers): Set name for symtab_shndx_hdr. (_bfd_elf_assign_file_positions_for_relocs): Use elf_numsections. (_bfd_elf_write_object_contents): Likewise. Skip reserved sections. (_bfd_elf_section_from_bfd_section): Check bfd_{abs,com,und}_section first. Use elf_section_data if available. Use elf_numsections. Start scan at index 1. (copy_private_bfd_data ): Comment fixes. (MAP_ONESYMTAB): Define above SHN_HIOS. (MAP_DYNSYMTAB): Likewise. (MAP_STRTAB): Likewise. (MAP_SHSTRTAB): Likewise. (MAP_SYM_SHNDX): New define. (_bfd_elf_copy_private_symbol_data): Handle symtab_shndx_section. (swap_out_syms): Swap out SHT_SYMTAB_SHNDX section too. * elfcode.h (elf_swap_symbol_in): Add shndx param, and handle shndx extension. (elf_swap_symbol_out): Likewise. (elf_object_p): Set elf_numsections, and use instead of e_shnum. Initialialise reserved elf_elfsections to point at shdr[0]. Remove redundant bfd_release calls. (elf_slurp_symbol_table): Read symbol shndx extension, and use with elf_swap_symbol_in. Translate st_shndx for > SHN_HIRESERVE too. * elflink.h (elf_link_is_defined_archive_symbol): Read symbol shndx extension, and use with elf_swap_symbol_in. (elf_link_record_local_dynamic_symbol): Likewise. (elf_link_add_object_symbols): Likewise. Also translate st_shndx for elf sections > SHN_HIRESERVE. (NAME(bfd_elf,size_dynamic_sections)): Adjust elf_swap_symbol_out call. (struct elf_final_link_info): Add locsym_shndx and symshndxbuf. (elf_bfd_final_link): Allocate the above, and tidy code allocating other buffers. Use elf_numsections instead of e_shnum. Adjust elf_swap_symbol_out calls. (elf_link_output_sym): Swap out symbol shndx extension too. (elf_link_flush_output_syms): And flush them to disk. (elf_link_output_extsym): Use SHN_BAD. Adjust elf_swap_symbol_out calls. (elf_gc_mark): Read symbol shndx extension, and use with elf_swap_symbol_in. (elf_link_input_bfd): Likewise, Translate st_shndx for elf sections > SHN_HIRESERVE too. Use SHN_BAD. (elf_reloc_symbol_deleted_p): Use symbol shndx extensions with elf_swap_symbol_in. Translate st_shndx > SHN_HIRESERVE too. (elf_bfd_discard_info): Read symbol shndx extension. Don't attempt to continue after a bfd error. * elf-m10200.c (mn10200_elf_relax_section): Only read local syms. Stash them immediately to symtab_hdr->contents rather than later in multiple places. Clean up afterwards. Read symbol shndx extension, and use with swap_symbol_in. Translate SHN_UNDEF, SHN_ABS, SHN_COMMON and elf sections > SHN_HIRESERVE to bfd sections too. Remove dead code. (mn10200_elf_relax_delete_bytes): Use symbol shndx extension when swapping in symbols. Tidy code adjusting global syms. Don't swap in global syms. (mn10200_elf_symbol_address_p): Likewise. Remove extsyms param. (mn10200_elf_get_relocated_section_contents): Read symbol shndx extension, and use with swap_symbol_in. Rename "size" -> "amt" to maximize code in common with other files. Translate st_shndx for > SHN_HIRESERVE too. Remove dead code. * elf-m10300.c (mn10300_elf_relax_section): Only read local syms. Stash them immediately to symtab_hdr->contents rather than later in multiple places. Clean up afterwards. Read symbol shndx extension, and use with swap_symbol_in. Remove dead code. (mn10300_elf_relax_delete_bytes): As for elf-m10200.c. (mn10300_elf_symbol_address_p): Likewise. (mn10300_elf_get_relocated_section_contents): Likewise. * elf32-h8300.c (elf32_h8_relax_section): As for elf-m10300.c. (elf32_h8_relax_delete_bytes): Likewise. (elf32_h8_symbol_address_p): Likewise. (elf32_h8_get_relocated_section_contents): Likewise. * elf32-hppa.c (elf32_hppa_size_stubs): Read symbol shndx extension, and use with swap_symbol_in. * elf64-hppa.c (elf64_hppa_check_relocs): Likewise. * elf32-i370.c (i370_elf_finish_dynamic_sections): Adjust call to bfd_elf32_swap_symbol_out. * elf32-m32r.c (m32r_elf_get_relocated_section_contents): Translate elf sections > SHN_HIRESERVE too. * elf32-m68k.c (bfd_m68k_elf32_create_embedded_relocs): Only read local syms. Read symbol shndx extension, and use with swap_symbol_in. * elf32-mips.c (_bfd_mips_elf_final_write_processing): Use elf_numsections rather than header e_shnum. * elf32-sh.c (sh_elf_relax_section): As for elf-m10300.c. (sh_elf_relax_delete_bytes): Likewise. (sh_elf_get_relocated_section_contents): Likewise. Only read local symbols. * elf32-v850.c (v850_elf_symbol_processing): Use an unsigned int to hold section index. Use elf_numsections rather than e_shnum. Rename "index" -> "indx" to avoid shadowing warning. (v850_elf_add_symbol_hook): Likewise. * elf64-alpha.c (elf64_alpha_relax_section): Only read local syms. Read symbol shndx extension, and use with swap_symbol_in. * elf32-xstormy16.c (xstormy16_elf_relax_section): Likewise. Translate SHN_COMMON and elf sections > SHN_HIRESERVE too. * elfxx-ia64.c (elfNN_ia64_relax_section): Likewise. (elfNN_ia64_aix_add_symbol_hook): Use elf_numsections. * elf-m10300.c (mn10300_elf_gc_mark_hook): Remove unnecessary checks before calling bfd_section_from_elf_index on local syms. * elf32-arm.h (elf32_arm_gc_mark_hook): Likewise. * elf32-avr.c (elf32_avr_gc_mark_hook): Likewise. * elf32-cris.c (cris_elf_gc_mark_hook): Likewise. * elf32-d10v.c (elf32_d10v_gc_mark_hook): Likewise. * elf32-fr30.c (fr30_elf_gc_mark_hook): Likewise. * elf32-hppa.c (elf32_hppa_gc_mark_hook): Likewise. * elf32-i386.c (elf_i386_gc_mark_hook): Likewise. * elf32-m32r.c (m32r_elf_gc_mark_hook): Likewise. * elf32-m68k.c (elf_m68k_gc_mark_hook): Likewise. * elf32-mcore.c (mcore_elf_gc_mark_hook): Likewise. * elf32-mips.c (_bfd_mips_elf_gc_mark_hook): Likewise. * elf32-openrisc.c (openrisc_elf_gc_mark_hook): Likewise. * elf32-ppc.c (ppc_elf_gc_mark_hook): Likewise. * elf32-s390.c (elf_s390_gc_mark_hook): Likewise. * elf32-sh.c (sh_elf_gc_mark_hook): Likewise. * elf32-sparc.c (elf32_sparc_gc_mark_hook): Likewise. * elf32-v850.c (v850_elf_gc_mark_hook): Likewise. * elf32-xstormy16.c (xstormy16_elf_gc_mark_hook): Likewise. * elf64-mips.c (mips_elf64_gc_mark_hook): Likewise. * elf64-mmix.c (mmix_elf_gc_mark_hook): Likewise. * elf64-ppc.c (ppc64_elf_gc_mark_hook): Likewise. * elf64-s390.c (elf_s390_gc_mark_hook): Likewise. * elf64-x86-64.c (elf64_x86_64_gc_mark_hook): Likewise. binutils/ChangeLog * readelf.c (symtab_shndx_hdr): New global. (SECTION_HEADER_INDEX): Define. (SECTION_HEADER_NUM): Define. (SECTION_HEADER): Define. (GET_ELF_SYMBOLS): Pass two params rather than three. (get_32bit_elf_symbols): Take file and section args. Read and use SHT_SYMTAB_SHNDX. (get_64bit_elf_symbols): Likewise. (dump_relocations): Use SECTION_HEADER to index "section_headers". (process_section_headers): Likewise. Use SECTION_HEADER_NUM too. Remember symtab_shdx_hdr. (process_program_headers): Scan from index 1 for segment map. (slurp_ia64_unwind_table): Use SECTION_HEADER to index "section_headers". (process_relocs): Likewise. Also adjust call to GET_ELF_SYMBOLS. (process_unwind): Likewise. (process_version_sections): Likewise. (process_symbol_table): Likewise. (display_debug_info): Likewise. (process_dynamic_segment): Fake up a symtab section for changed GET_ELF_SYMBOLS. (get_symbol_index_type): Check SHN_LOOS before SHN_LORESERVE. (process_program_headers): Kill signed/unsigned warning. (load_debug_str): Likewise. (display_debug_info): Likewise.
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unsigned int st_shndx; /* Associated section index */
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};
typedef struct elf_internal_sym Elf_Internal_Sym;
/* Note segments */
typedef struct elf_internal_note {
unsigned long namesz; /* Size of entry's owner string */
unsigned long descsz; /* Size of the note descriptor */
unsigned long type; /* Interpretation of the descriptor */
char * namedata; /* Start of the name+desc data */
char * descdata; /* Start of the desc data */
bfd_vma descpos; /* File offset of the descdata */
} Elf_Internal_Note;
/* Relocation Entries */
typedef struct elf_internal_rela {
bfd_vma r_offset; /* Location at which to apply the action */
bfd_vma r_info; /* Index and Type of relocation */
bfd_vma r_addend; /* Constant addend used to compute value */
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} Elf_Internal_Rela;
/* dynamic section structure */
typedef struct elf_internal_dyn {
/* This needs to support 64-bit values in elf64. */
bfd_vma d_tag; /* entry tag value */
union {
/* This needs to support 64-bit values in elf64. */
bfd_vma d_val;
bfd_vma d_ptr;
} d_un;
} Elf_Internal_Dyn;
/* This structure appears in a SHT_GNU_verdef section. */
typedef struct elf_internal_verdef {
unsigned short vd_version; /* Version number of structure. */
unsigned short vd_flags; /* Flags (VER_FLG_*). */
unsigned short vd_ndx; /* Version index. */
unsigned short vd_cnt; /* Number of verdaux entries. */
unsigned long vd_hash; /* Hash of name. */
unsigned long vd_aux; /* Offset to verdaux entries. */
unsigned long vd_next; /* Offset to next verdef. */
/* These fields are set up when BFD reads in the structure. FIXME:
It would be cleaner to store these in a different structure. */
bfd *vd_bfd; /* BFD. */
const char *vd_nodename; /* Version name. */
struct elf_internal_verdef *vd_nextdef; /* vd_next as pointer. */
struct elf_internal_verdaux *vd_auxptr; /* vd_aux as pointer. */
unsigned int vd_exp_refno; /* Used by the linker. */
} Elf_Internal_Verdef;
/* This structure appears in a SHT_GNU_verdef section. */
typedef struct elf_internal_verdaux {
unsigned long vda_name; /* String table offset of name. */
unsigned long vda_next; /* Offset to next verdaux. */
/* These fields are set up when BFD reads in the structure. FIXME:
It would be cleaner to store these in a different structure. */
const char *vda_nodename; /* vda_name as pointer. */
struct elf_internal_verdaux *vda_nextptr; /* vda_next as pointer. */
} Elf_Internal_Verdaux;
/* This structure appears in a SHT_GNU_verneed section. */
typedef struct elf_internal_verneed {
unsigned short vn_version; /* Version number of structure. */
unsigned short vn_cnt; /* Number of vernaux entries. */
unsigned long vn_file; /* String table offset of library name. */
unsigned long vn_aux; /* Offset to vernaux entries. */
unsigned long vn_next; /* Offset to next verneed. */
/* These fields are set up when BFD reads in the structure. FIXME:
It would be cleaner to store these in a different structure. */
bfd *vn_bfd; /* BFD. */
const char *vn_filename; /* vn_file as pointer. */
struct elf_internal_vernaux *vn_auxptr; /* vn_aux as pointer. */
struct elf_internal_verneed *vn_nextref; /* vn_nextref as pointer. */
} Elf_Internal_Verneed;
/* This structure appears in a SHT_GNU_verneed section. */
typedef struct elf_internal_vernaux {
unsigned long vna_hash; /* Hash of dependency name. */
unsigned short vna_flags; /* Flags (VER_FLG_*). */
unsigned short vna_other; /* Unused. */
unsigned long vna_name; /* String table offset to version name. */
unsigned long vna_next; /* Offset to next vernaux. */
/* These fields are set up when BFD reads in the structure. FIXME:
It would be cleaner to store these in a different structure. */
const char *vna_nodename; /* vna_name as pointer. */
struct elf_internal_vernaux *vna_nextptr; /* vna_next as pointer. */
} Elf_Internal_Vernaux;
/* This structure appears in a SHT_GNU_versym section. This is not a
standard ELF structure; ELF just uses Elf32_Half. */
typedef struct elf_internal_versym {
unsigned short vs_vers;
} Elf_Internal_Versym;
/* Structure for syminfo section. */
typedef struct
{
unsigned short int si_boundto;
unsigned short int si_flags;
} Elf_Internal_Syminfo;
/* This structure appears on the stack and in NT_AUXV core file notes. */
typedef struct
{
bfd_vma a_type;
bfd_vma a_val;
} Elf_Internal_Auxv;
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/* This structure is used to describe how sections should be assigned
to program segments. */
struct elf_segment_map
{
/* Next program segment. */
struct elf_segment_map *next;
/* Program segment type. */
unsigned long p_type;
/* Program segment flags. */
unsigned long p_flags;
/* Program segment physical address. */
bfd_vma p_paddr;
/* Program segment virtual address offset from section vma. */
bfd_vma p_vaddr_offset;
/* Program segment alignment. */
bfd_vma p_align;
bfd/ 2007-09-17 H.J. Lu <hongjiu.lu@intel.com> PR binutils/3281 PR binutils/5037 * elf-bfd.h (elf_obj_tdata): Remove relro. * elf.c (get_program_header_size): Check info->relro instead of elf_tdata (abfd)->relro. (_bfd_elf_map_sections_to_segments): Likewise. (assign_file_positions_for_load_sections): Don't set PT_GNU_RELRO segment alignment here. (assign_file_positions_for_non_load_sections): Properly set up PT_GNU_RELRO segment for copying executable/shared library. (rewrite_elf_program_header): Remove PT_GNU_RELRO segment. (copy_elf_program_header): Set p_size and p_size_valid fields for PT_GNU_RELRO segment. include/elf/ 2007-09-17 H.J. Lu <hongjiu.lu@intel.com> PR binutils/3281 PR binutils/5037 * internal.h (elf_segment_map): Add p_size and p_size_valid. (ELF_IS_SECTION_IN_SEGMENT): Allow SHF_TLS sections in PT_GNU_RELRO segments. ld/ 2007-09-17 H.J. Lu <hongjiu.lu@intel.com> PR binutils/3281 PR binutils/5037 * ldexp.h (ldexp_control): Add relro, relro_start_stat and relro_end_stat. * ldexp.c (fold_binary): Set expld.dataseg.relro to exp_dataseg_relro_start or exp_dataseg_relro_end when seeing DATA_SEGMENT_ALIGN or DATA_SEGMENT_RELRO_END, respectively. * ldlang.c (lang_size_sections_1): Properly set expld.dataseg.relro_start_stat and expld.dataseg.relro_end_stat. (find_relro_section_callback): New function. (lang_find_relro_sections_1): Likewise. (lang_find_relro_sections): Likewise. (lang_process): Call lang_find_relro_sections for non-relocatable link. ld/testsuite/ 2007-09-17 H.J. Lu <hongjiu.lu@intel.com> PR binutils/3281 PR binutils/5037 * ld-elf/binutils.exp: Update "-z relro" tests to use relro1.s. Add "-z relro" tests with relro2.s. Add "-z relro" tests with TLS for objcopy. * ld-elf/relro1.s: New file. * ld-elf/relro2.s: Likewise.
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/* Segment size in file and memory */
bfd_vma p_size;
/* Required size of filehdr + phdrs, if non-zero */
bfd_vma header_size;
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/* Whether the p_flags field is valid; if not, the flags are based
on the section flags. */
unsigned int p_flags_valid : 1;
/* Whether the p_paddr field is valid; if not, the physical address
is based on the section lma values. */
unsigned int p_paddr_valid : 1;
/* Whether the p_align field is valid; if not, PT_LOAD segment
alignment is based on the default maximum page size. */
unsigned int p_align_valid : 1;
bfd/ 2007-09-17 H.J. Lu <hongjiu.lu@intel.com> PR binutils/3281 PR binutils/5037 * elf-bfd.h (elf_obj_tdata): Remove relro. * elf.c (get_program_header_size): Check info->relro instead of elf_tdata (abfd)->relro. (_bfd_elf_map_sections_to_segments): Likewise. (assign_file_positions_for_load_sections): Don't set PT_GNU_RELRO segment alignment here. (assign_file_positions_for_non_load_sections): Properly set up PT_GNU_RELRO segment for copying executable/shared library. (rewrite_elf_program_header): Remove PT_GNU_RELRO segment. (copy_elf_program_header): Set p_size and p_size_valid fields for PT_GNU_RELRO segment. include/elf/ 2007-09-17 H.J. Lu <hongjiu.lu@intel.com> PR binutils/3281 PR binutils/5037 * internal.h (elf_segment_map): Add p_size and p_size_valid. (ELF_IS_SECTION_IN_SEGMENT): Allow SHF_TLS sections in PT_GNU_RELRO segments. ld/ 2007-09-17 H.J. Lu <hongjiu.lu@intel.com> PR binutils/3281 PR binutils/5037 * ldexp.h (ldexp_control): Add relro, relro_start_stat and relro_end_stat. * ldexp.c (fold_binary): Set expld.dataseg.relro to exp_dataseg_relro_start or exp_dataseg_relro_end when seeing DATA_SEGMENT_ALIGN or DATA_SEGMENT_RELRO_END, respectively. * ldlang.c (lang_size_sections_1): Properly set expld.dataseg.relro_start_stat and expld.dataseg.relro_end_stat. (find_relro_section_callback): New function. (lang_find_relro_sections_1): Likewise. (lang_find_relro_sections): Likewise. (lang_process): Call lang_find_relro_sections for non-relocatable link. ld/testsuite/ 2007-09-17 H.J. Lu <hongjiu.lu@intel.com> PR binutils/3281 PR binutils/5037 * ld-elf/binutils.exp: Update "-z relro" tests to use relro1.s. Add "-z relro" tests with relro2.s. Add "-z relro" tests with TLS for objcopy. * ld-elf/relro1.s: New file. * ld-elf/relro2.s: Likewise.
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/* Whether the p_size field is valid; if not, the size are based
on the section sizes. */
unsigned int p_size_valid : 1;
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/* Whether this segment includes the file header. */
unsigned int includes_filehdr : 1;
/* Whether this segment includes the program headers. */
unsigned int includes_phdrs : 1;
/* Number of sections (may be 0). */
unsigned int count;
/* Sections. Actual number of elements is in count field. */
asection *sections[1];
};
/* .tbss is special. It doesn't contribute memory space to normal
segments and it doesn't take file space in normal segments. */
#define ELF_TBSS_SPECIAL(sec_hdr, segment) \
(((sec_hdr)->sh_flags & SHF_TLS) != 0 \
&& (sec_hdr)->sh_type == SHT_NOBITS \
&& (segment)->p_type != PT_TLS)
#define ELF_SECTION_SIZE(sec_hdr, segment) \
(ELF_TBSS_SPECIAL(sec_hdr, segment) ? 0 : (sec_hdr)->sh_size)
/* Decide if the section SEC_HDR is in SEGMENT. If CHECK_VMA, then
VMAs are checked for alloc sections. If STRICT, then a zero size
section won't match at the end of a segment, unless the segment
is also zero size. Regardless of STRICT and CHECK_VMA, zero size
sections won't match at the start or end of PT_DYNAMIC, unless
PT_DYNAMIC is itself zero sized. */
#define ELF_SECTION_IN_SEGMENT_1(sec_hdr, segment, check_vma, strict) \
((/* Only PT_LOAD, PT_GNU_RELRO and PT_TLS segments can contain \
SHF_TLS sections. */ \
((((sec_hdr)->sh_flags & SHF_TLS) != 0) \
&& ((segment)->p_type == PT_TLS \
|| (segment)->p_type == PT_GNU_RELRO \
|| (segment)->p_type == PT_LOAD)) \
/* PT_TLS segment contains only SHF_TLS sections, PT_PHDR no \
sections at all. */ \
|| (((sec_hdr)->sh_flags & SHF_TLS) == 0 \
&& (segment)->p_type != PT_TLS \
&& (segment)->p_type != PT_PHDR)) \
/* Any section besides one of type SHT_NOBITS must have file \
offsets within the segment. */ \
&& ((sec_hdr)->sh_type == SHT_NOBITS \
|| ((bfd_vma) (sec_hdr)->sh_offset >= (segment)->p_offset \
&& (!(strict) \
|| ((sec_hdr)->sh_offset - (segment)->p_offset \
<= (segment)->p_filesz - 1)) \
&& (((sec_hdr)->sh_offset - (segment)->p_offset \
+ ELF_SECTION_SIZE(sec_hdr, segment)) \
<= (segment)->p_filesz))) \
/* SHF_ALLOC sections must have VMAs within the segment. */ \
&& (!(check_vma) \
|| ((sec_hdr)->sh_flags & SHF_ALLOC) == 0 \
|| ((sec_hdr)->sh_addr >= (segment)->p_vaddr \
&& (!(strict) \
|| ((sec_hdr)->sh_addr - (segment)->p_vaddr \
<= (segment)->p_memsz - 1)) \
&& (((sec_hdr)->sh_addr - (segment)->p_vaddr \
+ ELF_SECTION_SIZE(sec_hdr, segment)) \
<= (segment)->p_memsz))) \
/* No zero size sections at start or end of PT_DYNAMIC. */ \
&& ((segment)->p_type != PT_DYNAMIC \
|| (sec_hdr)->sh_size != 0 \
|| (segment)->p_memsz == 0 \
|| (((sec_hdr)->sh_type == SHT_NOBITS \
|| ((bfd_vma) (sec_hdr)->sh_offset > (segment)->p_offset \
&& ((sec_hdr)->sh_offset - (segment)->p_offset \
< (segment)->p_filesz))) \
&& (((sec_hdr)->sh_flags & SHF_ALLOC) == 0 \
|| ((sec_hdr)->sh_addr > (segment)->p_vaddr \
&& ((sec_hdr)->sh_addr - (segment)->p_vaddr \
< (segment)->p_memsz))))))
#define ELF_SECTION_IN_SEGMENT(sec_hdr, segment) \
(ELF_SECTION_IN_SEGMENT_1 (sec_hdr, segment, 1, 0))
#define ELF_SECTION_IN_SEGMENT_STRICT(sec_hdr, segment) \
(ELF_SECTION_IN_SEGMENT_1 (sec_hdr, segment, 1, 1))
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#endif /* _ELF_INTERNAL_H */