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/* Mach-O support for BFD.
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/* Mach-O support for BFD.
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Copyright 2011
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Copyright 2011, 2012
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Free Software Foundation, Inc.
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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 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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This program is free software; you can redistribute it and/or modify
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unsigned char r_address[4];
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unsigned char r_address[4];
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unsigned char r_symbolnum[4];
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unsigned char r_symbolnum[4];
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};
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};
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#define BFD_MACH_O_RELENT_SIZE 8
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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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struct mach_o_symtab_command_external
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{
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{
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unsigned char symoff[4];
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unsigned char symoff[4]; /* File offset of the symbol table. */
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unsigned char nsyms[4];
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unsigned char nsyms[4]; /* Number of symbols. */
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unsigned char stroff[4];
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unsigned char stroff[4]; /* File offset of the string table. */
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unsigned char strsize[4];
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unsigned char strsize[4]; /* String table size. */
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};
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};
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struct mach_o_nlist_external
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struct mach_o_nlist_external
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{
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{
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unsigned char n_strx[4];
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unsigned char n_strx[4];
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{
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{
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unsigned char version[4];
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unsigned char version[4];
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unsigned char reserved[4];
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unsigned char reserved[4];
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};
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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_fat_header_external
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struct mach_o_fat_header_external
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{
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{
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unsigned char magic[4];
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unsigned char magic[4];
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unsigned char nfat_arch[4]; /* Number of components. */
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unsigned char nfat_arch[4]; /* Number of components. */
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};
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};
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