Commit | Line | Data |
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2522fe45 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
2f79e48a RM |
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 | * | |
2f79e48a RM |
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 | ||
00e19cee DM |
20 | #define ELF_COMPAT 1 |
21 | ||
2f79e48a RM |
22 | /* |
23 | * Rename the basic ELF layout types to refer to the 32-bit class of files. | |
24 | */ | |
25 | #undef ELF_CLASS | |
26 | #define ELF_CLASS ELFCLASS32 | |
27 | ||
28 | #undef elfhdr | |
29 | #undef elf_phdr | |
1fcccbac | 30 | #undef elf_shdr |
2f79e48a RM |
31 | #undef elf_note |
32 | #undef elf_addr_t | |
00e19cee | 33 | #undef ELF_GNU_PROPERTY_ALIGN |
2f79e48a RM |
34 | #define elfhdr elf32_hdr |
35 | #define elf_phdr elf32_phdr | |
1fcccbac | 36 | #define elf_shdr elf32_shdr |
2f79e48a RM |
37 | #define elf_note elf32_note |
38 | #define elf_addr_t Elf32_Addr | |
00e19cee | 39 | #define ELF_GNU_PROPERTY_ALIGN ELF32_GNU_PROPERTY_ALIGN |
2f79e48a | 40 | |
49ae4d4b DV |
41 | /* |
42 | * Some data types as stored in coredump. | |
43 | */ | |
2aa362c4 | 44 | #define user_long_t compat_long_t |
49ae4d4b | 45 | #define user_siginfo_t compat_siginfo_t |
fa4751f4 | 46 | #define copy_siginfo_to_external copy_siginfo_to_external32 |
49ae4d4b | 47 | |
2f79e48a RM |
48 | /* |
49 | * The machine-dependent core note format types are defined in elfcore-compat.h, | |
50 | * which requires asm/elf.h to define compat_elf_gregset_t et al. | |
51 | */ | |
52 | #define elf_prstatus compat_elf_prstatus | |
f2485a2d | 53 | #define elf_prstatus_common compat_elf_prstatus_common |
2f79e48a RM |
54 | #define elf_prpsinfo compat_elf_prpsinfo |
55 | ||
e2bb80d5 AB |
56 | #undef ns_to_kernel_old_timeval |
57 | #define ns_to_kernel_old_timeval ns_to_old_timeval32 | |
2f79e48a RM |
58 | |
59 | /* | |
60 | * To use this file, asm/elf.h must define compat_elf_check_arch. | |
61 | * The other following macros can be defined if the compat versions | |
62 | * differ from the native ones, or omitted when they match. | |
63 | */ | |
64 | ||
2f79e48a RM |
65 | #undef elf_check_arch |
66 | #define elf_check_arch compat_elf_check_arch | |
67 | ||
68 | #ifdef COMPAT_ELF_PLATFORM | |
69 | #undef ELF_PLATFORM | |
70 | #define ELF_PLATFORM COMPAT_ELF_PLATFORM | |
71 | #endif | |
72 | ||
73 | #ifdef COMPAT_ELF_HWCAP | |
74 | #undef ELF_HWCAP | |
75 | #define ELF_HWCAP COMPAT_ELF_HWCAP | |
76 | #endif | |
77 | ||
66d6e3b3 AB |
78 | #ifdef COMPAT_ELF_HWCAP2 |
79 | #undef ELF_HWCAP2 | |
80 | #define ELF_HWCAP2 COMPAT_ELF_HWCAP2 | |
81 | #endif | |
82 | ||
2f79e48a RM |
83 | #ifdef COMPAT_ARCH_DLINFO |
84 | #undef ARCH_DLINFO | |
85 | #define ARCH_DLINFO COMPAT_ARCH_DLINFO | |
86 | #endif | |
87 | ||
88 | #ifdef COMPAT_ELF_ET_DYN_BASE | |
89 | #undef ELF_ET_DYN_BASE | |
90 | #define ELF_ET_DYN_BASE COMPAT_ELF_ET_DYN_BASE | |
91 | #endif | |
92 | ||
2f79e48a RM |
93 | #ifdef COMPAT_ELF_PLAT_INIT |
94 | #undef ELF_PLAT_INIT | |
95 | #define ELF_PLAT_INIT COMPAT_ELF_PLAT_INIT | |
96 | #endif | |
97 | ||
98 | #ifdef COMPAT_SET_PERSONALITY | |
99 | #undef SET_PERSONALITY | |
100 | #define SET_PERSONALITY COMPAT_SET_PERSONALITY | |
101 | #endif | |
102 | ||
103 | #ifdef compat_start_thread | |
bc3d7bf6 GKB |
104 | #define COMPAT_START_THREAD(ex, regs, new_ip, new_sp) \ |
105 | compat_start_thread(regs, new_ip, new_sp) | |
106 | #endif | |
107 | ||
108 | #ifdef COMPAT_START_THREAD | |
109 | #undef START_THREAD | |
110 | #define START_THREAD COMPAT_START_THREAD | |
2f79e48a RM |
111 | #endif |
112 | ||
9a29a671 GKB |
113 | #ifdef compat_arch_setup_additional_pages |
114 | #define COMPAT_ARCH_SETUP_ADDITIONAL_PAGES(bprm, ex, interpreter) \ | |
115 | compat_arch_setup_additional_pages(bprm, interpreter) | |
116 | #endif | |
117 | ||
118 | #ifdef COMPAT_ARCH_SETUP_ADDITIONAL_PAGES | |
2f79e48a RM |
119 | #undef ARCH_HAS_SETUP_ADDITIONAL_PAGES |
120 | #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 | |
9a29a671 GKB |
121 | #undef ARCH_SETUP_ADDITIONAL_PAGES |
122 | #define ARCH_SETUP_ADDITIONAL_PAGES COMPAT_ARCH_SETUP_ADDITIONAL_PAGES | |
2f79e48a RM |
123 | #endif |
124 | ||
6e0d6ac5 KC |
125 | #ifdef compat_elf_read_implies_exec |
126 | #undef elf_read_implies_exec | |
127 | #define elf_read_implies_exec compat_elf_read_implies_exec | |
128 | #endif | |
129 | ||
2f79e48a RM |
130 | /* |
131 | * Rename a few of the symbols that binfmt_elf.c will define. | |
132 | * These are all local so the names don't really matter, but it | |
133 | * might make some debugging less confusing not to duplicate them. | |
134 | */ | |
135 | #define elf_format compat_elf_format | |
136 | #define init_elf_binfmt init_compat_elf_binfmt | |
137 | #define exit_elf_binfmt exit_compat_elf_binfmt | |
9e1a3ce0 KC |
138 | #define binfmt_elf_test_cases compat_binfmt_elf_test_cases |
139 | #define binfmt_elf_test_suite compat_binfmt_elf_test_suite | |
2f79e48a RM |
140 | |
141 | /* | |
142 | * We share all the actual code with the native (64-bit) version. | |
143 | */ | |
144 | #include "binfmt_elf.c" |