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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 */