349 lines
11 KiB
C
349 lines
11 KiB
C
/* Mach-O support for BFD.
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Copyright 2011, 2012
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Free Software Foundation, Inc.
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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 3 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., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#ifndef _MACH_O_EXTERNAL_H
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#define _MACH_O_EXTERNAL_H
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struct mach_o_header_external
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{
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unsigned char magic[4]; /* Magic number. */
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unsigned char cputype[4]; /* CPU that this object is for. */
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unsigned char cpusubtype[4]; /* CPU subtype. */
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unsigned char filetype[4]; /* Type of file. */
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unsigned char ncmds[4]; /* Number of load commands. */
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unsigned char sizeofcmds[4]; /* Total size of load commands. */
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unsigned char flags[4]; /* Flags. */
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unsigned char reserved[4]; /* Reserved (on 64-bit version only). */
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};
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#define BFD_MACH_O_HEADER_SIZE 28
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#define BFD_MACH_O_HEADER_64_SIZE 32
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/* 32-bit section header. */
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struct mach_o_section_32_external
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{
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unsigned char sectname[16]; /* Section name. */
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unsigned char segname[16]; /* Segment that the section belongs to. */
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unsigned char addr[4]; /* Address of this section in memory. */
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unsigned char size[4]; /* Size in bytes of this section. */
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unsigned char offset[4]; /* File offset of this section. */
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unsigned char align[4]; /* log2 of this section's alignment. */
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unsigned char reloff[4]; /* File offset of this section's relocs. */
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unsigned char nreloc[4]; /* Number of relocs for this section. */
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unsigned char flags[4]; /* Section flags/attributes. */
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unsigned char reserved1[4];
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unsigned char reserved2[4];
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};
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#define BFD_MACH_O_SECTION_SIZE 68
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/* 64-bit section header. */
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struct mach_o_section_64_external
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{
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unsigned char sectname[16]; /* Section name. */
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unsigned char segname[16]; /* Segment that the section belongs to. */
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unsigned char addr[8]; /* Address of this section in memory. */
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unsigned char size[8]; /* Size in bytes of this section. */
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unsigned char offset[4]; /* File offset of this section. */
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unsigned char align[4]; /* log2 of this section's alignment. */
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unsigned char reloff[4]; /* File offset of this section's relocs. */
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unsigned char nreloc[4]; /* Number of relocs for this section. */
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unsigned char flags[4]; /* Section flags/attributes. */
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unsigned char reserved1[4];
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unsigned char reserved2[4];
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unsigned char reserved3[4];
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};
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#define BFD_MACH_O_SECTION_64_SIZE 80
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struct mach_o_load_command_external
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{
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unsigned char cmd[4]; /* The type of load command. */
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unsigned char cmdsize[4]; /* Size in bytes of entire command. */
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};
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#define BFD_MACH_O_LC_SIZE 8
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struct mach_o_segment_command_32_external
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{
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unsigned char segname[16]; /* Name of this segment. */
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unsigned char vmaddr[4]; /* Virtual memory address of this segment. */
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unsigned char vmsize[4]; /* Size there, in bytes. */
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unsigned char fileoff[4]; /* Offset in bytes of the data to be mapped. */
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unsigned char filesize[4]; /* Size in bytes on disk. */
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unsigned char maxprot[4]; /* Maximum permitted vm protection. */
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unsigned char initprot[4]; /* Initial vm protection. */
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unsigned char nsects[4]; /* Number of sections in this segment. */
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unsigned char flags[4]; /* Flags that affect the loading. */
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};
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#define BFD_MACH_O_LC_SEGMENT_SIZE 56 /* Include the header. */
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struct mach_o_segment_command_64_external
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{
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unsigned char segname[16]; /* Name of this segment. */
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unsigned char vmaddr[8]; /* Virtual memory address of this segment. */
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unsigned char vmsize[8]; /* Size there, in bytes. */
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unsigned char fileoff[8]; /* Offset in bytes of the data to be mapped. */
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unsigned char filesize[8]; /* Size in bytes on disk. */
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unsigned char maxprot[4]; /* Maximum permitted vm protection. */
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unsigned char initprot[4]; /* Initial vm protection. */
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unsigned char nsects[4]; /* Number of sections in this segment. */
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unsigned char flags[4]; /* Flags that affect the loading. */
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};
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#define BFD_MACH_O_LC_SEGMENT_64_SIZE 72 /* Include the header. */
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struct mach_o_reloc_info_external
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{
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unsigned char r_address[4];
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unsigned char r_symbolnum[4];
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};
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#define BFD_MACH_O_RELENT_SIZE 8
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/* Relocations are based on 'address' being a section offset and an assumption
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that sections are never more than 2^24-1 bytes in size. Relocation data
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also carry information on type/size/PC-relative/extern and whether scattered
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or not [stored in the MSB of the r_address]. */
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#define BFD_MACH_O_SR_SCATTERED 0x80000000
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/* For a non-scattered reloc, the relocation info is found in r_symbolnum.
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Bytes 1 to 3 contain the symbol number (0xffffff, in a non-scattered PAIR).
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Byte 4 contains the relocation info - but with differing bit-positions
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dependent on target endian-ness - as below. */
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#define BFD_MACH_O_LE_PCREL 0x01
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#define BFD_MACH_O_LE_LENGTH_SHIFT 1
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#define BFD_MACH_O_LE_EXTERN 0x08
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#define BFD_MACH_O_LE_TYPE_SHIFT 4
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#define BFD_MACH_O_BE_PCREL 0x80
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#define BFD_MACH_O_BE_LENGTH_SHIFT 5
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#define BFD_MACH_O_BE_EXTERN 0x10
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#define BFD_MACH_O_BE_TYPE_SHIFT 0
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/* The field sizes are the same for both BE and LE. */
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#define BFD_MACH_O_LENGTH_MASK 0x03
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#define BFD_MACH_O_TYPE_MASK 0x0f
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/* For a scattered reloc entry the info is contained in r_address. There
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is no need to discriminate on target endian-ness, since the design was
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arranged to produce the same layout on both. Scattered relocations are
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only used for local items, therefore there is no 'extern' field. */
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#define BFD_MACH_O_SR_PCREL 0x40000000
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#define BFD_MACH_O_GET_SR_LENGTH(s) (((s) >> 28) & 0x3)
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#define BFD_MACH_O_GET_SR_TYPE(s) (((s) >> 24) & 0x0f)
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#define BFD_MACH_O_GET_SR_ADDRESS(s) ((s) & 0x00ffffff)
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#define BFD_MACH_O_SET_SR_LENGTH(l) (((l) & 0x3) << 28)
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#define BFD_MACH_O_SET_SR_TYPE(t) (((t) & 0xf) << 24)
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#define BFD_MACH_O_SET_SR_ADDRESS(s) ((s) & 0x00ffffff)
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struct mach_o_symtab_command_external
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{
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unsigned char symoff[4]; /* File offset of the symbol table. */
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unsigned char nsyms[4]; /* Number of symbols. */
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unsigned char stroff[4]; /* File offset of the string table. */
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unsigned char strsize[4]; /* String table size. */
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};
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struct mach_o_nlist_external
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{
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unsigned char n_strx[4];
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unsigned char n_type[1];
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unsigned char n_sect[1];
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unsigned char n_desc[2];
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unsigned char n_value[4];
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};
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#define BFD_MACH_O_NLIST_SIZE 12
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struct mach_o_nlist_64_external
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{
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unsigned char n_strx[4];
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unsigned char n_type[1];
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unsigned char n_sect[1];
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unsigned char n_desc[2];
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unsigned char n_value[8];
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};
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#define BFD_MACH_O_NLIST_64_SIZE 16
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struct mach_o_thread_command_external
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{
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unsigned char flavour[4];
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unsigned char count[4];
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};
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/* For commands that just have a string or a path. */
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struct mach_o_str_command_external
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{
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unsigned char str[4];
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};
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struct mach_o_dylib_command_external
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{
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unsigned char name[4];
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unsigned char timestamp[4];
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unsigned char current_version[4];
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unsigned char compatibility_version[4];
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};
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struct mach_o_dysymtab_command_external
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{
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unsigned char ilocalsym[4]; /* Index of. */
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unsigned char nlocalsym[4]; /* Number of. */
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unsigned char iextdefsym[4];
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unsigned char nextdefsym[4];
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unsigned char iundefsym[4];
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unsigned char nundefsym[4];
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unsigned char tocoff[4];
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unsigned char ntoc[4];
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unsigned char modtaboff[4];
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unsigned char nmodtab[4];
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unsigned char extrefsymoff[4];
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unsigned char nextrefsyms[4];
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unsigned char indirectsymoff[4];
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unsigned char nindirectsyms[4];
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unsigned char extreloff[4];
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unsigned char nextrel[4];
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unsigned char locreloff[4];
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unsigned char nlocrel[4];
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};
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struct mach_o_dylib_module_external
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{
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unsigned char module_name[4];
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unsigned char iextdefsym[4];
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unsigned char nextdefsym[4];
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unsigned char irefsym[4];
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unsigned char nrefsym[4];
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unsigned char ilocalsym[4];
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unsigned char nlocalsym[4];
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unsigned char iextrel[4];
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unsigned char nextrel[4];
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unsigned char iinit_iterm[4];
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unsigned char ninit_nterm[4];
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unsigned char objc_module_info_addr[4];
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unsigned char objc_module_info_size[4];
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};
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#define BFD_MACH_O_DYLIB_MODULE_SIZE 52
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struct mach_o_dylib_module_64_external
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{
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unsigned char module_name[4];
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unsigned char iextdefsym[4];
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unsigned char nextdefsym[4];
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unsigned char irefsym[4];
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unsigned char nrefsym[4];
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unsigned char ilocalsym[4];
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unsigned char nlocalsym[4];
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unsigned char iextrel[4];
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unsigned char nextrel[4];
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unsigned char iinit_iterm[4];
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unsigned char ninit_nterm[4];
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unsigned char objc_module_info_size[4];
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unsigned char objc_module_info_addr[8];
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};
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#define BFD_MACH_O_DYLIB_MODULE_64_SIZE 56
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struct mach_o_dylib_table_of_contents_external
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{
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unsigned char symbol_index[4];
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unsigned char module_index[4];
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};
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#define BFD_MACH_O_TABLE_OF_CONTENT_SIZE 8
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struct mach_o_linkedit_data_command_external
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{
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unsigned char dataoff[4];
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unsigned char datasize[4];
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};
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struct mach_o_dyld_info_command_external
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{
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unsigned char rebase_off[4];
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unsigned char rebase_size[4];
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unsigned char bind_off[4];
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unsigned char bind_size[4];
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unsigned char weak_bind_off[4];
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unsigned char weak_bind_size[4];
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unsigned char lazy_bind_off[4];
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unsigned char lazy_bind_size[4];
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unsigned char export_off[4];
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unsigned char export_size[4];
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};
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struct mach_o_version_min_command_external
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{
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unsigned char version[4];
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unsigned char reserved[4];
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};
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struct mach_o_encryption_info_command_external
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{
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unsigned char cryptoff[4]; /* File offset of the encrypted area. */
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unsigned char cryptsize[4]; /* Size of the encrypted area. */
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unsigned char cryptid[4]; /* Encryption method. */
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};
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struct mach_o_fvmlib_command_external
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{
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unsigned char name[4]; /* Offset of the name. */
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unsigned char minor_version[4];
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unsigned char header_addr[4];
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};
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struct mach_o_entry_point_command_external
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{
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unsigned char entryoff[8]; /* File offset of the entry point. */
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unsigned char stacksize[8]; /* Initial stack size, if no null. */
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};
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struct mach_o_source_version_command_external
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{
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unsigned char version[8]; /* Version A.B.C.D.E, with 10 bits for B-E,
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and 24 bits for A. */
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};
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/* The LD_DATA_IN_CODE command use a linkedit_data_command that points to
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a table of entries. */
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struct mach_o_data_in_code_entry_external
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{
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unsigned char offset[4]; /* Offset from the mach_header. */
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unsigned char length[2]; /* Number of bytes. */
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unsigned char kind[2]; /* Kind. See BFD_MACH_O_DICE_ values. */
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};
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struct mach_o_fat_header_external
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{
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unsigned char magic[4];
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unsigned char nfat_arch[4]; /* Number of components. */
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};
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struct mach_o_fat_arch_external
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{
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unsigned char cputype[4];
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unsigned char cpusubtype[4];
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unsigned char offset[4]; /* File offset of the member. */
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unsigned char size[4]; /* Size of the member. */
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unsigned char align[4]; /* Power of 2. */
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};
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#endif /* _MACH_O_EXTERNAL_H */
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