Loading...
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_shdr
32#undef elf_note
33#undef elf_addr_t
34#define elfhdr elf32_hdr
35#define elf_phdr elf32_phdr
36#define elf_shdr elf32_shdr
37#define elf_note elf32_note
38#define elf_addr_t Elf32_Addr
39
40/*
41 * Some data types as stored in coredump.
42 */
43#define user_long_t compat_long_t
44#define user_siginfo_t compat_siginfo_t
45#define copy_siginfo_to_user copy_siginfo_to_user32
46
47/*
48 * The machine-dependent core note format types are defined in elfcore-compat.h,
49 * which requires asm/elf.h to define compat_elf_gregset_t et al.
50 */
51#define elf_prstatus compat_elf_prstatus
52#define elf_prpsinfo compat_elf_prpsinfo
53
54/*
55 * Compat version of cputime_to_compat_timeval, perhaps this
56 * should be an inline in <linux/compat.h>.
57 */
58static void cputime_to_compat_timeval(const cputime_t cputime,
59 struct compat_timeval *value)
60{
61 struct timeval tv;
62 cputime_to_timeval(cputime, &tv);
63 value->tv_sec = tv.tv_sec;
64 value->tv_usec = tv.tv_usec;
65}
66
67#undef cputime_to_timeval
68#define cputime_to_timeval cputime_to_compat_timeval
69
70
71/*
72 * To use this file, asm/elf.h must define compat_elf_check_arch.
73 * The other following macros can be defined if the compat versions
74 * differ from the native ones, or omitted when they match.
75 */
76
77#undef ELF_ARCH
78#undef elf_check_arch
79#define elf_check_arch compat_elf_check_arch
80
81#ifdef COMPAT_ELF_PLATFORM
82#undef ELF_PLATFORM
83#define ELF_PLATFORM COMPAT_ELF_PLATFORM
84#endif
85
86#ifdef COMPAT_ELF_HWCAP
87#undef ELF_HWCAP
88#define ELF_HWCAP COMPAT_ELF_HWCAP
89#endif
90
91#ifdef COMPAT_ELF_HWCAP2
92#undef ELF_HWCAP2
93#define ELF_HWCAP2 COMPAT_ELF_HWCAP2
94#endif
95
96#ifdef COMPAT_ARCH_DLINFO
97#undef ARCH_DLINFO
98#define ARCH_DLINFO COMPAT_ARCH_DLINFO
99#endif
100
101#ifdef COMPAT_ELF_ET_DYN_BASE
102#undef ELF_ET_DYN_BASE
103#define ELF_ET_DYN_BASE COMPAT_ELF_ET_DYN_BASE
104#endif
105
106#ifdef COMPAT_ELF_EXEC_PAGESIZE
107#undef ELF_EXEC_PAGESIZE
108#define ELF_EXEC_PAGESIZE COMPAT_ELF_EXEC_PAGESIZE
109#endif
110
111#ifdef COMPAT_ELF_PLAT_INIT
112#undef ELF_PLAT_INIT
113#define ELF_PLAT_INIT COMPAT_ELF_PLAT_INIT
114#endif
115
116#ifdef COMPAT_SET_PERSONALITY
117#undef SET_PERSONALITY
118#define SET_PERSONALITY COMPAT_SET_PERSONALITY
119#endif
120
121#ifdef compat_start_thread
122#undef start_thread
123#define start_thread compat_start_thread
124#endif
125
126#ifdef compat_arch_setup_additional_pages
127#undef ARCH_HAS_SETUP_ADDITIONAL_PAGES
128#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
129#undef arch_setup_additional_pages
130#define arch_setup_additional_pages compat_arch_setup_additional_pages
131#endif
132
133/*
134 * Rename a few of the symbols that binfmt_elf.c will define.
135 * These are all local so the names don't really matter, but it
136 * might make some debugging less confusing not to duplicate them.
137 */
138#define elf_format compat_elf_format
139#define init_elf_binfmt init_compat_elf_binfmt
140#define exit_elf_binfmt exit_compat_elf_binfmt
141
142/*
143 * We share all the actual code with the native (64-bit) version.
144 */
145#include "binfmt_elf.c"
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * 32-bit compatibility support for ELF format executables and core dumps.
4 *
5 * Copyright (C) 2007 Red Hat, Inc. All rights reserved.
6 *
7 * Red Hat Author: Roland McGrath.
8 *
9 * This file is used in a 64-bit kernel that wants to support 32-bit ELF.
10 * asm/elf.h is responsible for defining the compat_* and COMPAT_* macros
11 * used below, with definitions appropriate for 32-bit ABI compatibility.
12 *
13 * We use macros to rename the ABI types and machine-dependent
14 * functions used in binfmt_elf.c to compat versions.
15 */
16
17#include <linux/elfcore-compat.h>
18#include <linux/time.h>
19
20/*
21 * Rename the basic ELF layout types to refer to the 32-bit class of files.
22 */
23#undef ELF_CLASS
24#define ELF_CLASS ELFCLASS32
25
26#undef elfhdr
27#undef elf_phdr
28#undef elf_shdr
29#undef elf_note
30#undef elf_addr_t
31#define elfhdr elf32_hdr
32#define elf_phdr elf32_phdr
33#define elf_shdr elf32_shdr
34#define elf_note elf32_note
35#define elf_addr_t Elf32_Addr
36
37/*
38 * Some data types as stored in coredump.
39 */
40#define user_long_t compat_long_t
41#define user_siginfo_t compat_siginfo_t
42#define copy_siginfo_to_user copy_siginfo_to_user32
43
44/*
45 * The machine-dependent core note format types are defined in elfcore-compat.h,
46 * which requires asm/elf.h to define compat_elf_gregset_t et al.
47 */
48#define elf_prstatus compat_elf_prstatus
49#define elf_prpsinfo compat_elf_prpsinfo
50
51#undef ns_to_timeval
52#define ns_to_timeval ns_to_old_timeval32
53
54/*
55 * To use this file, asm/elf.h must define compat_elf_check_arch.
56 * The other following macros can be defined if the compat versions
57 * differ from the native ones, or omitted when they match.
58 */
59
60#undef ELF_ARCH
61#undef elf_check_arch
62#define elf_check_arch compat_elf_check_arch
63
64#ifdef COMPAT_ELF_PLATFORM
65#undef ELF_PLATFORM
66#define ELF_PLATFORM COMPAT_ELF_PLATFORM
67#endif
68
69#ifdef COMPAT_ELF_HWCAP
70#undef ELF_HWCAP
71#define ELF_HWCAP COMPAT_ELF_HWCAP
72#endif
73
74#ifdef COMPAT_ELF_HWCAP2
75#undef ELF_HWCAP2
76#define ELF_HWCAP2 COMPAT_ELF_HWCAP2
77#endif
78
79#ifdef COMPAT_ARCH_DLINFO
80#undef ARCH_DLINFO
81#define ARCH_DLINFO COMPAT_ARCH_DLINFO
82#endif
83
84#ifdef COMPAT_ELF_ET_DYN_BASE
85#undef ELF_ET_DYN_BASE
86#define ELF_ET_DYN_BASE COMPAT_ELF_ET_DYN_BASE
87#endif
88
89#ifdef COMPAT_ELF_EXEC_PAGESIZE
90#undef ELF_EXEC_PAGESIZE
91#define ELF_EXEC_PAGESIZE COMPAT_ELF_EXEC_PAGESIZE
92#endif
93
94#ifdef COMPAT_ELF_PLAT_INIT
95#undef ELF_PLAT_INIT
96#define ELF_PLAT_INIT COMPAT_ELF_PLAT_INIT
97#endif
98
99#ifdef COMPAT_SET_PERSONALITY
100#undef SET_PERSONALITY
101#define SET_PERSONALITY COMPAT_SET_PERSONALITY
102#endif
103
104#ifdef compat_start_thread
105#undef start_thread
106#define start_thread compat_start_thread
107#endif
108
109#ifdef compat_arch_setup_additional_pages
110#undef ARCH_HAS_SETUP_ADDITIONAL_PAGES
111#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
112#undef arch_setup_additional_pages
113#define arch_setup_additional_pages compat_arch_setup_additional_pages
114#endif
115
116/*
117 * Rename a few of the symbols that binfmt_elf.c will define.
118 * These are all local so the names don't really matter, but it
119 * might make some debugging less confusing not to duplicate them.
120 */
121#define elf_format compat_elf_format
122#define init_elf_binfmt init_compat_elf_binfmt
123#define exit_elf_binfmt exit_compat_elf_binfmt
124
125/*
126 * We share all the actual code with the native (64-bit) version.
127 */
128#include "binfmt_elf.c"