| // Copyright 2009 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| /* |
| * Definitions needed for accessing MACH object headers. |
| */ |
| |
| typedef struct { |
| ulong magic; /* mach magic number identifier */ |
| ulong cputype; /* cpu specifier */ |
| ulong cpusubtype; /* machine specifier */ |
| ulong filetype; /* type of file */ |
| ulong ncmds; /* number of load commands */ |
| ulong sizeofcmds; /* the size of all the load commands */ |
| ulong flags; /* flags */ |
| ulong reserved; /* reserved */ |
| } Machhdr; |
| |
| typedef struct { |
| ulong type; /* type of load command */ |
| ulong size; /* total size in bytes */ |
| } MachCmd; |
| |
| typedef struct { |
| MachCmd cmd; |
| char segname[16]; /* segment name */ |
| uvlong vmaddr; /* memory address of this segment */ |
| uvlong vmsize; /* memory size of this segment */ |
| uvlong fileoff; /* file offset of this segment */ |
| uvlong filesize; /* amount to map from the file */ |
| ulong maxprot; /* maximum VM protection */ |
| ulong initprot; /* initial VM protection */ |
| ulong nsects; /* number of sections in segment */ |
| ulong flags; /* flags */ |
| } MachSeg64; /* for 64-bit architectures */ |
| |
| typedef struct { |
| MachCmd cmd; |
| ulong fileoff; /* file offset of this segment */ |
| ulong filesize; /* amount to map from the file */ |
| } MachSymSeg; |
| |
| typedef struct { |
| char sectname[16]; /* name of this section */ |
| char segname[16]; /* segment this section goes in */ |
| uvlong addr; /* memory address of this section */ |
| uvlong size; /* size in bytes of this section */ |
| ulong offset; /* file offset of this section */ |
| ulong align; /* section alignment (power of 2) */ |
| ulong reloff; /* file offset of relocation entries */ |
| ulong nreloc; /* number of relocation entries */ |
| ulong flags; /* flags (section type and attributes)*/ |
| ulong reserved1; /* reserved (for offset or index) */ |
| ulong reserved2; /* reserved (for count or sizeof) */ |
| ulong reserved3; /* reserved */ |
| } MachSect64; /* for 64-bit architectures */ |
| |
| enum { |
| MACH_CPU_TYPE_X86_64 = (1<<24)|7, |
| MACH_CPU_SUBTYPE_X86 = 3, |
| MACH_EXECUTABLE_TYPE = 2, |
| MACH_SEGMENT_64 = 0x19, /* 64-bit mapped segment */ |
| MACH_SYMSEG = 3, /* obsolete gdb symtab, reused by go */ |
| MACH_UNIXTHREAD = 0x5, /* thread (for stack) */ |
| }; |
| |
| |
| #define MACH_MAG ((0xcf<<24) | (0xfa<<16) | (0xed<<8) | 0xfe) |
