2522fe45a186e (Thomas Gleixner 2019-05-28 09:57:20 -0700 1) // SPDX-License-Identifier: GPL-2.0-only
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 2) /*
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 3) * 32-bit compatibility support for ELF format executables and core dumps.
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 4) *
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 5) * Copyright (C) 2007 Red Hat, Inc. All rights reserved.
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 6) *
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 7) * Red Hat Author: Roland McGrath.
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 8) *
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 9) * This file is used in a 64-bit kernel that wants to support 32-bit ELF.
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 10) * asm/elf.h is responsible for defining the compat_* and COMPAT_* macros
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 11) * used below, with definitions appropriate for 32-bit ABI compatibility.
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 12) *
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 13) * We use macros to rename the ABI types and machine-dependent
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 14) * functions used in binfmt_elf.c to compat versions.
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 15) */
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 16)
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 17) #include <linux/elfcore-compat.h>
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 18) #include <linux/time.h>
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 19)
00e19ceec80b0 (Dave Martin 2020-03-16 16:50:44 +0000 20) #define ELF_COMPAT 1
00e19ceec80b0 (Dave Martin 2020-03-16 16:50:44 +0000 21)
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 22) /*
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 23) * Rename the basic ELF layout types to refer to the 32-bit class of files.
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 24) */
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 25) #undef ELF_CLASS
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 26) #define ELF_CLASS ELFCLASS32
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 27)
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 28) #undef elfhdr
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 29) #undef elf_phdr
1fcccbac89f5b (Daisuke HATAYAMA 2010-03-05 13:44:07 -0800 30) #undef elf_shdr
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 31) #undef elf_note
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 32) #undef elf_addr_t
00e19ceec80b0 (Dave Martin 2020-03-16 16:50:44 +0000 33) #undef ELF_GNU_PROPERTY_ALIGN
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 34) #define elfhdr elf32_hdr
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 35) #define elf_phdr elf32_phdr
1fcccbac89f5b (Daisuke HATAYAMA 2010-03-05 13:44:07 -0800 36) #define elf_shdr elf32_shdr
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 37) #define elf_note elf32_note
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 38) #define elf_addr_t Elf32_Addr
00e19ceec80b0 (Dave Martin 2020-03-16 16:50:44 +0000 39) #define ELF_GNU_PROPERTY_ALIGN ELF32_GNU_PROPERTY_ALIGN
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 40)
49ae4d4b113be (Denys Vlasenko 2012-10-04 17:15:35 -0700 41) /*
49ae4d4b113be (Denys Vlasenko 2012-10-04 17:15:35 -0700 42) * Some data types as stored in coredump.
49ae4d4b113be (Denys Vlasenko 2012-10-04 17:15:35 -0700 43) */
2aa362c49c314 (Denys Vlasenko 2012-10-04 17:15:36 -0700 44) #define user_long_t compat_long_t
49ae4d4b113be (Denys Vlasenko 2012-10-04 17:15:35 -0700 45) #define user_siginfo_t compat_siginfo_t
fa4751f454e6b (Eric W. Biederman 2020-05-05 12:12:54 +0200 46) #define copy_siginfo_to_external copy_siginfo_to_external32
49ae4d4b113be (Denys Vlasenko 2012-10-04 17:15:35 -0700 47)
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 48) /*
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 49) * The machine-dependent core note format types are defined in elfcore-compat.h,
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 50) * which requires asm/elf.h to define compat_elf_gregset_t et al.
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 51) */
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 52) #define elf_prstatus compat_elf_prstatus
f2485a2dc9f0f (Al Viro 2020-06-13 00:08:44 -0400 53) #define elf_prstatus_common compat_elf_prstatus_common
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 54) #define elf_prpsinfo compat_elf_prpsinfo
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 55)
e2bb80d55d75c (Arnd Bergmann 2017-11-23 13:46:33 +0100 56) #undef ns_to_kernel_old_timeval
e2bb80d55d75c (Arnd Bergmann 2017-11-23 13:46:33 +0100 57) #define ns_to_kernel_old_timeval ns_to_old_timeval32
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 58)
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 59) /*
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 60) * To use this file, asm/elf.h must define compat_elf_check_arch.
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 61) * The other following macros can be defined if the compat versions
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 62) * differ from the native ones, or omitted when they match.
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 63) */
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 64)
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 65) #undef elf_check_arch
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 66) #define elf_check_arch compat_elf_check_arch
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 67)
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 68) #ifdef COMPAT_ELF_PLATFORM
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 69) #undef ELF_PLATFORM
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 70) #define ELF_PLATFORM COMPAT_ELF_PLATFORM
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 71) #endif
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 72)
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 73) #ifdef COMPAT_ELF_HWCAP
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 74) #undef ELF_HWCAP
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 75) #define ELF_HWCAP COMPAT_ELF_HWCAP
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 76) #endif
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 77)
66d6e3b385778 (Ard Biesheuvel 2014-03-03 07:34:44 +0000 78) #ifdef COMPAT_ELF_HWCAP2
66d6e3b385778 (Ard Biesheuvel 2014-03-03 07:34:44 +0000 79) #undef ELF_HWCAP2
66d6e3b385778 (Ard Biesheuvel 2014-03-03 07:34:44 +0000 80) #define ELF_HWCAP2 COMPAT_ELF_HWCAP2
66d6e3b385778 (Ard Biesheuvel 2014-03-03 07:34:44 +0000 81) #endif
66d6e3b385778 (Ard Biesheuvel 2014-03-03 07:34:44 +0000 82)
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 83) #ifdef COMPAT_ARCH_DLINFO
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 84) #undef ARCH_DLINFO
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 85) #define ARCH_DLINFO COMPAT_ARCH_DLINFO
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 86) #endif
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 87)
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 88) #ifdef COMPAT_ELF_ET_DYN_BASE
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 89) #undef ELF_ET_DYN_BASE
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 90) #define ELF_ET_DYN_BASE COMPAT_ELF_ET_DYN_BASE
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 91) #endif
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 92)
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 93) #ifdef COMPAT_ELF_PLAT_INIT
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 94) #undef ELF_PLAT_INIT
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 95) #define ELF_PLAT_INIT COMPAT_ELF_PLAT_INIT
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 96) #endif
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 97)
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 98) #ifdef COMPAT_SET_PERSONALITY
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 99) #undef SET_PERSONALITY
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 100) #define SET_PERSONALITY COMPAT_SET_PERSONALITY
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 101) #endif
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 102)
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 103) #ifdef compat_start_thread
bc3d7bf61a9ea (Gabriel Krisman Bertazi 2020-10-03 23:25:31 -0400 104) #define COMPAT_START_THREAD(ex, regs, new_ip, new_sp) \
bc3d7bf61a9ea (Gabriel Krisman Bertazi 2020-10-03 23:25:31 -0400 105) compat_start_thread(regs, new_ip, new_sp)
bc3d7bf61a9ea (Gabriel Krisman Bertazi 2020-10-03 23:25:31 -0400 106) #endif
bc3d7bf61a9ea (Gabriel Krisman Bertazi 2020-10-03 23:25:31 -0400 107)
bc3d7bf61a9ea (Gabriel Krisman Bertazi 2020-10-03 23:25:31 -0400 108) #ifdef COMPAT_START_THREAD
bc3d7bf61a9ea (Gabriel Krisman Bertazi 2020-10-03 23:25:31 -0400 109) #undef START_THREAD
bc3d7bf61a9ea (Gabriel Krisman Bertazi 2020-10-03 23:25:31 -0400 110) #define START_THREAD COMPAT_START_THREAD
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 111) #endif
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 112)
9a29a671902c2 (Gabriel Krisman Bertazi 2020-10-03 23:25:33 -0400 113) #ifdef compat_arch_setup_additional_pages
9a29a671902c2 (Gabriel Krisman Bertazi 2020-10-03 23:25:33 -0400 114) #define COMPAT_ARCH_SETUP_ADDITIONAL_PAGES(bprm, ex, interpreter) \
9a29a671902c2 (Gabriel Krisman Bertazi 2020-10-03 23:25:33 -0400 115) compat_arch_setup_additional_pages(bprm, interpreter)
9a29a671902c2 (Gabriel Krisman Bertazi 2020-10-03 23:25:33 -0400 116) #endif
9a29a671902c2 (Gabriel Krisman Bertazi 2020-10-03 23:25:33 -0400 117)
9a29a671902c2 (Gabriel Krisman Bertazi 2020-10-03 23:25:33 -0400 118) #ifdef COMPAT_ARCH_SETUP_ADDITIONAL_PAGES
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 119) #undef ARCH_HAS_SETUP_ADDITIONAL_PAGES
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 120) #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
9a29a671902c2 (Gabriel Krisman Bertazi 2020-10-03 23:25:33 -0400 121) #undef ARCH_SETUP_ADDITIONAL_PAGES
9a29a671902c2 (Gabriel Krisman Bertazi 2020-10-03 23:25:33 -0400 122) #define ARCH_SETUP_ADDITIONAL_PAGES COMPAT_ARCH_SETUP_ADDITIONAL_PAGES
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 123) #endif
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 124)
6e0d6ac5f3d9d (Kees Cook 2020-03-26 23:48:20 -0700 125) #ifdef compat_elf_read_implies_exec
6e0d6ac5f3d9d (Kees Cook 2020-03-26 23:48:20 -0700 126) #undef elf_read_implies_exec
6e0d6ac5f3d9d (Kees Cook 2020-03-26 23:48:20 -0700 127) #define elf_read_implies_exec compat_elf_read_implies_exec
6e0d6ac5f3d9d (Kees Cook 2020-03-26 23:48:20 -0700 128) #endif
6e0d6ac5f3d9d (Kees Cook 2020-03-26 23:48:20 -0700 129)
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 130) /*
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 131) * Rename a few of the symbols that binfmt_elf.c will define.
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 132) * These are all local so the names don't really matter, but it
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 133) * might make some debugging less confusing not to duplicate them.
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 134) */
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 135) #define elf_format compat_elf_format
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 136) #define init_elf_binfmt init_compat_elf_binfmt
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 137) #define exit_elf_binfmt exit_compat_elf_binfmt
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 138)
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 139) /*
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 140) * We share all the actual code with the native (64-bit) version.
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 141) */
2f79e48ae2651 (Roland McGrath 2008-01-30 13:31:46 +0100 142) #include "binfmt_elf.c"
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