diff options
Diffstat (limited to 'fs/compat_binfmt_elf.c')
-rw-r--r-- | fs/compat_binfmt_elf.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/fs/compat_binfmt_elf.c b/fs/compat_binfmt_elf.c new file mode 100644 index 000000000000..0adced2f296f --- /dev/null +++ b/fs/compat_binfmt_elf.c | |||
@@ -0,0 +1,131 @@ | |||
1 | /* | ||
2 | * 32-bit compatibility support for ELF format executables and core dumps. | ||
3 | * | ||
4 | * Copyright (C) 2007 Red Hat, Inc. All rights reserved. | ||
5 | * | ||
6 | * This copyrighted material is made available to anyone wishing to use, | ||
7 | * modify, copy, or redistribute it subject to the terms and conditions | ||
8 | * of the GNU General Public License v.2. | ||
9 | * | ||
10 | * Red Hat Author: Roland McGrath. | ||
11 | * | ||
12 | * This file is used in a 64-bit kernel that wants to support 32-bit ELF. | ||
13 | * asm/elf.h is responsible for defining the compat_* and COMPAT_* macros | ||
14 | * used below, with definitions appropriate for 32-bit ABI compatibility. | ||
15 | * | ||
16 | * We use macros to rename the ABI types and machine-dependent | ||
17 | * functions used in binfmt_elf.c to compat versions. | ||
18 | */ | ||
19 | |||
20 | #include <linux/elfcore-compat.h> | ||
21 | #include <linux/time.h> | ||
22 | |||
23 | /* | ||
24 | * Rename the basic ELF layout types to refer to the 32-bit class of files. | ||
25 | */ | ||
26 | #undef ELF_CLASS | ||
27 | #define ELF_CLASS ELFCLASS32 | ||
28 | |||
29 | #undef elfhdr | ||
30 | #undef elf_phdr | ||
31 | #undef elf_note | ||
32 | #undef elf_addr_t | ||
33 | #define elfhdr elf32_hdr | ||
34 | #define elf_phdr elf32_phdr | ||
35 | #define elf_note elf32_note | ||
36 | #define elf_addr_t Elf32_Addr | ||
37 | |||
38 | /* | ||
39 | * The machine-dependent core note format types are defined in elfcore-compat.h, | ||
40 | * which requires asm/elf.h to define compat_elf_gregset_t et al. | ||
41 | */ | ||
42 | #define elf_prstatus compat_elf_prstatus | ||
43 | #define elf_prpsinfo compat_elf_prpsinfo | ||
44 | |||
45 | /* | ||
46 | * Compat version of cputime_to_compat_timeval, perhaps this | ||
47 | * should be an inline in <linux/compat.h>. | ||
48 | */ | ||
49 | static void cputime_to_compat_timeval(const cputime_t cputime, | ||
50 | struct compat_timeval *value) | ||
51 | { | ||
52 | struct timeval tv; | ||
53 | cputime_to_timeval(cputime, &tv); | ||
54 | value->tv_sec = tv.tv_sec; | ||
55 | value->tv_usec = tv.tv_usec; | ||
56 | } | ||
57 | |||
58 | #undef cputime_to_timeval | ||
59 | #define cputime_to_timeval cputime_to_compat_timeval | ||
60 | |||
61 | |||
62 | /* | ||
63 | * To use this file, asm/elf.h must define compat_elf_check_arch. | ||
64 | * The other following macros can be defined if the compat versions | ||
65 | * differ from the native ones, or omitted when they match. | ||
66 | */ | ||
67 | |||
68 | #undef ELF_ARCH | ||
69 | #undef elf_check_arch | ||
70 | #define elf_check_arch compat_elf_check_arch | ||
71 | |||
72 | #ifdef COMPAT_ELF_PLATFORM | ||
73 | #undef ELF_PLATFORM | ||
74 | #define ELF_PLATFORM COMPAT_ELF_PLATFORM | ||
75 | #endif | ||
76 | |||
77 | #ifdef COMPAT_ELF_HWCAP | ||
78 | #undef ELF_HWCAP | ||
79 | #define ELF_HWCAP COMPAT_ELF_HWCAP | ||
80 | #endif | ||
81 | |||
82 | #ifdef COMPAT_ARCH_DLINFO | ||
83 | #undef ARCH_DLINFO | ||
84 | #define ARCH_DLINFO COMPAT_ARCH_DLINFO | ||
85 | #endif | ||
86 | |||
87 | #ifdef COMPAT_ELF_ET_DYN_BASE | ||
88 | #undef ELF_ET_DYN_BASE | ||
89 | #define ELF_ET_DYN_BASE COMPAT_ELF_ET_DYN_BASE | ||
90 | #endif | ||
91 | |||
92 | #ifdef COMPAT_ELF_EXEC_PAGESIZE | ||
93 | #undef ELF_EXEC_PAGESIZE | ||
94 | #define ELF_EXEC_PAGESIZE COMPAT_ELF_EXEC_PAGESIZE | ||
95 | #endif | ||
96 | |||
97 | #ifdef COMPAT_ELF_PLAT_INIT | ||
98 | #undef ELF_PLAT_INIT | ||
99 | #define ELF_PLAT_INIT COMPAT_ELF_PLAT_INIT | ||
100 | #endif | ||
101 | |||
102 | #ifdef COMPAT_SET_PERSONALITY | ||
103 | #undef SET_PERSONALITY | ||
104 | #define SET_PERSONALITY COMPAT_SET_PERSONALITY | ||
105 | #endif | ||
106 | |||
107 | #ifdef compat_start_thread | ||
108 | #undef start_thread | ||
109 | #define start_thread compat_start_thread | ||
110 | #endif | ||
111 | |||
112 | #ifdef compat_arch_setup_additional_pages | ||
113 | #undef ARCH_HAS_SETUP_ADDITIONAL_PAGES | ||
114 | #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 | ||
115 | #undef arch_setup_additional_pages | ||
116 | #define arch_setup_additional_pages compat_arch_setup_additional_pages | ||
117 | #endif | ||
118 | |||
119 | /* | ||
120 | * Rename a few of the symbols that binfmt_elf.c will define. | ||
121 | * These are all local so the names don't really matter, but it | ||
122 | * might make some debugging less confusing not to duplicate them. | ||
123 | */ | ||
124 | #define elf_format compat_elf_format | ||
125 | #define init_elf_binfmt init_compat_elf_binfmt | ||
126 | #define exit_elf_binfmt exit_compat_elf_binfmt | ||
127 | |||
128 | /* | ||
129 | * We share all the actual code with the native (64-bit) version. | ||
130 | */ | ||
131 | #include "binfmt_elf.c" | ||