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144 lines
3.8 KiB
144 lines
3.8 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* 32-bit compatibility support for ELF format executables and core dumps. |
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* |
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* Copyright (C) 2007 Red Hat, Inc. All rights reserved. |
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* |
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* Red Hat Author: Roland McGrath. |
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* |
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* This file is used in a 64-bit kernel that wants to support 32-bit ELF. |
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* asm/elf.h is responsible for defining the compat_* and COMPAT_* macros |
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* used below, with definitions appropriate for 32-bit ABI compatibility. |
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* |
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* We use macros to rename the ABI types and machine-dependent |
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* functions used in binfmt_elf.c to compat versions. |
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*/ |
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#include <linux/elfcore-compat.h> |
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#include <linux/time.h> |
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#define ELF_COMPAT 1 |
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/* |
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* Rename the basic ELF layout types to refer to the 32-bit class of files. |
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*/ |
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#undef ELF_CLASS |
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#define ELF_CLASS ELFCLASS32 |
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#undef elfhdr |
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#undef elf_phdr |
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#undef elf_shdr |
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#undef elf_note |
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#undef elf_addr_t |
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#undef ELF_GNU_PROPERTY_ALIGN |
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#define elfhdr elf32_hdr |
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#define elf_phdr elf32_phdr |
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#define elf_shdr elf32_shdr |
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#define elf_note elf32_note |
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#define elf_addr_t Elf32_Addr |
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#define ELF_GNU_PROPERTY_ALIGN ELF32_GNU_PROPERTY_ALIGN |
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/* |
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* Some data types as stored in coredump. |
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*/ |
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#define user_long_t compat_long_t |
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#define user_siginfo_t compat_siginfo_t |
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#define copy_siginfo_to_external copy_siginfo_to_external32 |
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/* |
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* The machine-dependent core note format types are defined in elfcore-compat.h, |
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* which requires asm/elf.h to define compat_elf_gregset_t et al. |
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*/ |
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#define elf_prstatus compat_elf_prstatus |
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#define elf_prstatus_common compat_elf_prstatus_common |
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#define elf_prpsinfo compat_elf_prpsinfo |
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#undef ns_to_kernel_old_timeval |
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#define ns_to_kernel_old_timeval ns_to_old_timeval32 |
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/* |
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* To use this file, asm/elf.h must define compat_elf_check_arch. |
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* The other following macros can be defined if the compat versions |
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* differ from the native ones, or omitted when they match. |
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*/ |
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#undef elf_check_arch |
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#define elf_check_arch compat_elf_check_arch |
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#ifdef COMPAT_ELF_PLATFORM |
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#undef ELF_PLATFORM |
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#define ELF_PLATFORM COMPAT_ELF_PLATFORM |
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#endif |
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#ifdef COMPAT_ELF_HWCAP |
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#undef ELF_HWCAP |
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#define ELF_HWCAP COMPAT_ELF_HWCAP |
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#endif |
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#ifdef COMPAT_ELF_HWCAP2 |
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#undef ELF_HWCAP2 |
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#define ELF_HWCAP2 COMPAT_ELF_HWCAP2 |
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#endif |
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#ifdef COMPAT_ARCH_DLINFO |
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#undef ARCH_DLINFO |
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#define ARCH_DLINFO COMPAT_ARCH_DLINFO |
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#endif |
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#ifdef COMPAT_ELF_ET_DYN_BASE |
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#undef ELF_ET_DYN_BASE |
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#define ELF_ET_DYN_BASE COMPAT_ELF_ET_DYN_BASE |
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#endif |
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#ifdef COMPAT_ELF_PLAT_INIT |
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#undef ELF_PLAT_INIT |
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#define ELF_PLAT_INIT COMPAT_ELF_PLAT_INIT |
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#endif |
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#ifdef COMPAT_SET_PERSONALITY |
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#undef SET_PERSONALITY |
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#define SET_PERSONALITY COMPAT_SET_PERSONALITY |
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#endif |
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#ifdef compat_start_thread |
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#define COMPAT_START_THREAD(ex, regs, new_ip, new_sp) \ |
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compat_start_thread(regs, new_ip, new_sp) |
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#endif |
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#ifdef COMPAT_START_THREAD |
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#undef START_THREAD |
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#define START_THREAD COMPAT_START_THREAD |
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#endif |
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#ifdef compat_arch_setup_additional_pages |
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#define COMPAT_ARCH_SETUP_ADDITIONAL_PAGES(bprm, ex, interpreter) \ |
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compat_arch_setup_additional_pages(bprm, interpreter) |
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#endif |
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#ifdef COMPAT_ARCH_SETUP_ADDITIONAL_PAGES |
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#undef ARCH_HAS_SETUP_ADDITIONAL_PAGES |
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#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 |
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#undef ARCH_SETUP_ADDITIONAL_PAGES |
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#define ARCH_SETUP_ADDITIONAL_PAGES COMPAT_ARCH_SETUP_ADDITIONAL_PAGES |
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#endif |
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#ifdef compat_elf_read_implies_exec |
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#undef elf_read_implies_exec |
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#define elf_read_implies_exec compat_elf_read_implies_exec |
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#endif |
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/* |
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* Rename a few of the symbols that binfmt_elf.c will define. |
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* These are all local so the names don't really matter, but it |
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* might make some debugging less confusing not to duplicate them. |
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*/ |
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#define elf_format compat_elf_format |
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#define init_elf_binfmt init_compat_elf_binfmt |
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#define exit_elf_binfmt exit_compat_elf_binfmt |
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#define binfmt_elf_test_cases compat_binfmt_elf_test_cases |
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#define binfmt_elf_test_suite compat_binfmt_elf_test_suite |
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/* |
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* We share all the actual code with the native (64-bit) version. |
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*/ |
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#include "binfmt_elf.c"
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