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