From b14fee9febef245dc43042a0feaa8620dbcc02ee Mon Sep 17 00:00:00 2001 From: Fabian Groffen Date: Mon, 8 Sep 2008 07:02:56 +0000 Subject: Initial commit of Mach-O related files. (bug #236512) - added macho.h (Mach-O definitions) and scanmacho.c (the scanelf equivalent for Mach-O files) - changed the Makefile to compile scanmacho (tested compilation on Darwin and Solaris) - changed paxinc.h to include macho.h and paxmacho.h - extended paxmacho.[ch] with relevant code to read meta information from Mach-O files --- macho.h | 279 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 279 insertions(+) create mode 100644 macho.h (limited to 'macho.h') diff --git a/macho.h b/macho.h new file mode 100644 index 0000000..2372e42 --- /dev/null +++ b/macho.h @@ -0,0 +1,279 @@ +/* + * Copyright 2008 Gentoo Foundation + * Distributed under the terms of the GNU General Public License v2 + * $Header: /var/cvsroot/gentoo-projects/pax-utils/macho.h,v 1.5 2008/09/08 07:02:56 grobian Exp $ + */ + + +#ifndef _MACHO_H +#define _MACHO_H 1 + +#include + +/* + * http://developer.apple.com/documentation/DeveloperTools/Conceptual/MachORuntime/Reference/reference.html + */ + +#define CPU_ARCH_ABI64 0x01000000 /* 64 bit */ +typedef int cpu_type_t; +typedef int cpu_subtype_t; + + +struct mach_header +{ + uint32_t magic; + cpu_type_t cputype; + cpu_subtype_t cpusubtype; + uint32_t filetype; + uint32_t ncmds; + uint32_t sizeofcmds; + uint32_t flags; +}; + +/* magic */ +#define MH_MAGIC 0xfeedface /* same endianness */ +#define MH_CIGAM 0xcefaedfe /* the other endianness */ +/* cputype */ +#define CPU_TYPE_POWERPC ((cpu_type_t)18) +#define CPU_TYPE_I386 ((cpu_type_t)7) +#define CPU_TYPE_ARM ((cpu_type_t)12) +/* cpusubtype */ +#define CPU_SUBTYPE_POWERPC_ALL ((cpu_subtype_t)0) +#define CPU_SUBTYPE_POWERPC_601 ((cpu_subtype_t)1) +#define CPU_SUBTYPE_POWERPC_602 ((cpu_subtype_t)2) +#define CPU_SUBTYPE_POWERPC_603 ((cpu_subtype_t)3) +#define CPU_SUBTYPE_POWERPC_603e ((cpu_subtype_t)4) +#define CPU_SUBTYPE_POWERPC_603ev ((cpu_subtype_t)5) +#define CPU_SUBTYPE_POWERPC_604 ((cpu_subtype_t)6) +#define CPU_SUBTYPE_POWERPC_604e ((cpu_subtype_t)7) +#define CPU_SUBTYPE_POWERPC_620 ((cpu_subtype_t)8) +#define CPU_SUBTYPE_POWERPC_750 ((cpu_subtype_t)9) +#define CPU_SUBTYPE_POWERPC_7400 ((cpu_subtype_t)10) +#define CPU_SUBTYPE_POWERPC_7450 ((cpu_subtype_t)11) +#define CPU_SUBTYPE_POWERPC_970 ((cpu_subtype_t)100) +#define CPU_SUBTYPE_I386_ALL ((cpu_subtype_t)3) +#define CPU_SUBTYPE_486 ((cpu_subtype_t)4) +#define CPU_SUBTYPE_586 ((cpu_subtype_t)5) +#define CPU_SUBTYPE_PENTIUM_3 ((cpu_subtype_t)8) +#define CPU_SUBTYPE_PENTIUM_M ((cpu_subtype_t)9) +#define CPU_SUBTYPE_PENTIUM_4 ((cpu_subtype_t)10) +#define CPU_SUBTYPE_ITANIUM ((cpu_subtype_t)11) +#define CPU_SUBTYPE_XEON ((cpu_subtype_t)12) +/* filetype */ +#define MH_OBJECT 0x1 /* intermediate object file (.o) */ +#define MH_EXECUTE 0x2 /* standard executable program */ +#define MH_BUNDLE 0x8 /* dlopen plugin (.bundle) */ +#define MH_DYLIB 0x6 /* dynamic shared library (.dylib) */ +#define MH_PRELOAD 0x5 /* executable not loaded by Mac OS X kernel (ROM) */ +#define MH_CORE 0x4 /* program crash core file */ +#define MH_DYLINKER 0x7 /* dynamic linker shared library (dyld) */ +#define MH_DYLIB_STUB 0x9 /* shared library stub for static only, no section*/ +#define MH_DSYM 0xa /* debug symbols file (in .dSYM dir) */ +/* flags */ +#define MH_NOUNDEFS 0x1 /* there are no undefined references */ +#define MH_INCRLINK 0x2 /* the object file is the output of an + incremental link against a base file and + cannot be link edited again */ +#define MH_DYLDLINK 0x4 /* the object file is input for the dynamic + linker and cannot be staticly link edited + again */ +#define MH_TWOLEVEL 0x80 /* the image is using two-level namespace + bindings */ +#define MH_BINDATLOAD 0x8 /* the dynamic linker should bind the + undefined references when the file is + loaded */ +#define MH_PREBOUND 0x10 /* the file’s undefined references are + prebound */ +#define MH_PREBINDABLE 0x800/* the file is not prebound but can have its + prebinding redone, used only when + MH_PREBOUND is not set */ +#define MH_NOFIXPREBINDING 0x400 /* the dynamic linker doesn’t notify + the prebinding agent about this + executable */ +#define MH_ALLMODSBOUND 0x1000 /* indicates that this binary binds to + all two-level namespace modules of its + dependent libraries, used only when + MH_PREBINDABLE and MH_TWOLEVEL are set + */ +#define MH_CANONICAL 0x4000 /* the file has been canonicalized by + unprebinding, clearing prebinding + information from the file */ +#define MH_SPLIT_SEGS 0x20 /* the file has its read-only and + read-write segments split */ +#define MH_FORCE_FLAT 0x100 /* the executable is forcing all images to + use flat namespace bindings */ +#define MH_SUBSECTIONS_VIA_SYMBOLS 0x2000/* the sections of the object + file can be divided into + individual blocks, these + blocks are dead-stripped if + they are not used by other + code */ +#define MH_NOMULTIDEFS 0x200 /* this umbrella guarantees there are no + multiple defintions of symbols in its + subimages, as a result the two-level + namespace hints can always be used */ + + +struct mach_header_64 +{ + uint32_t magic; + cpu_type_t cputype; + cpu_subtype_t cpusubtype; + uint32_t filetype; + uint32_t ncmds; + uint32_t sizeofcmds; + uint32_t flags; + uint32_t reserved; +}; + +/* magic */ +#define MH_MAGIC_64 0xfeedfacf /* same endianness 64-bits */ +#define MH_CIGAM_64 0xcffaedfe /* the other endianness 64-bits */ +/* cputype */ +#define CPU_TYPE_POWERPC64 (CPU_TYPE_POWERPC | CPU_ARCH_ABI64) +#define CPU_TYPE_X86_64 (CPU_TYPE_I386 | CPU_ARCH_ABI64) + + +struct load_command +{ + uint32_t cmd; + uint32_t cmdsize; +}; + +/* cmd */ +#define LC_UUID 0x1b /* Specifies the 128-bit UUID for an image + or its corresponding dSYM file. */ +#define LC_SEGMENT 0x1 /* Defines a segment of this file to be + mapped into the address space of the + process that loads this file. It also + includes all the sections contained by + the segment. */ +#define LC_SEGMENT_64 0x19 /* Defines a 64-bit segment of this file to + be mapped into the address space of the + process that loads this file. It also + includes all the sections contained by + the segment. */ +#define LC_SYMTAB 0x2 /* Specifies the symbol table for this file. + This information is used by both static + and dynamic linkers when linking the + file, and also by debuggers to map + symbols to the original source code files + from which the symbols were generated. */ +#define LC_DYSYMTAB 0xb /* Specifies additional symbol table + information used by the dynamic linker. + */ +#define LC_THREAD 0x4 +#define LC_UNIXTHREAD 0x5 /* For an executable file, the LC_UNIXTHREAD + command defines the initial thread state + of the main thread of the process. + LC_THREAD is similar to LC_UNIXTHREAD but + does not cause the kernel to allocate a + stack. */ +#define LC_LOAD_DYLIB 0xc /* Defines the name of a dynamic shared + library that this file links against. + (needed) */ +#define LC_ID_DYLIB 0xd /* Specifies the install name of a dynamic + shared library. (soname) */ +#define LC_PREBOUND_DYLIB 0x10 /* For a shared library that this + executable is linked prebound against, + specifies the modules in the shared + library that are used. */ +#define LC_LOAD_DYLINKER 0xe/* Specifies the dynamic linker that the + kernel executes to load this file. (.interp) */ +#define LC_ID_DYLINKER 0xf /* Identifies this file as a dynamic linker. */ +#define LC_ROUTINES 0x11 /* Contains the address of the shared + library initialization routine (specified + by the linker’s -init option). */ +#define LC_ROUTINES_64 0x1a /* Contains the address of the shared + library 64-bit initialization routine + (specified by the linker’s -init option). + */ +#define LC_TWOLEVEL_HINTS 0x16 /* Contains the two-level namespace + lookup hint table. */ +#define LC_SUB_FRAMEWORK 0x12/* Identifies this file as the + implementation of a subframework of an + umbrella framework. The name of the + umbrella framework is stored in the + string parameter. */ +#define LC_SUB_UMBRELLA 0x13/* Specifies a file that is a subumbrella of + this umbrella framework. */ +#define LC_SUB_LIBRARY 0x15/* Identifies this file as the + implementation of a sublibrary of an + umbrella framework. The name of the + umbrella framework is stored in the + string parameter. Note that Apple has not + defined a supported location for + sublibraries. */ +#define LC_SUB_CLIENT 0x14/* A subframework can explicitly allow + another framework or bundle to link + against it by including an LC_SUB_CLIENT + load command containing the name of the + framework or a client name for a bundle. + */ + + +union lc_str +{ + uint32_t offset; + /* The ptr field is not used in Mach-O files. + char *ptr; */ +}; +/* offset: A byte offset from the start of the load command that + * contains this string to the start of the string data. + */ + +/* +Defines the data used by the dynamic linker to match a shared library against the files that have linked to it. +*/ +struct dylib +{ + union lc_str name; + uint32_t timestamp; + uint32_t current_version; + uint32_t compatibility_version; +}; + +/* +Defines the attributes of the LC_LOAD_DYLIB and LC_ID_DYLIB load commands. +*/ +struct dylib_command +{ + uint32_t cmd; + uint32_t cmdsize; + struct dylib dylib; +}; + +/* cmd: set to either LC_LOAD_DYLIB, LC_LOAD_WEAK_DYLIB, or LC_ID_DYLIB. */ +/* cmdsize: set to sizeof(dylib_command) plus the size of the data + * pointed to by the name field of the dylib field. */ + + +struct dylinker_command { + uint32_t cmd; + uint32_t cmdsize; + union lc_str name; +}; + + +struct fat_header +{ + uint32_t magic; + uint32_t nfat_arch; +}; + +/* magic */ +#define FAT_MAGIC 0xcafebabe /* big endian, how it is stored */ +#define FAT_CIGAM 0xbebafeca /* for intel dudes */ +/* nfat_arch: the number of far_arch structures following */ + + +struct fat_arch +{ + cpu_type_t cputype; + cpu_subtype_t cpusubtype; + uint32_t offset; + uint32_t size; + uint32_t align; +}; + +#endif -- cgit v1.2.3-65-gdbad