// SPDX-License-Identifier: GPL-2.0-only /* * 32-bit compatibility support for ELF format executables and core dumps. * * Copyright (C) 2007 Red Hat, Inc. All rights reserved. * * Red Hat Author: Roland McGrath. * * This file is used in a 64-bit kernel that wants to support 32-bit ELF. * asm/elf.h is responsible for defining the compat_* and COMPAT_* macros * used below, with definitions appropriate for 32-bit ABI compatibility. * * We use macros to rename the ABI types and machine-dependent * functions used in binfmt_elf.c to compat versions. */ #include <linux/elfcore-compat.h> #include <linux/time.h> #define ELF_COMPAT 1 /* * Rename the basic ELF layout types to refer to the 32-bit class of files. */ #undef ELF_CLASS #define ELF_CLASS ELFCLASS32 #undef elfhdr #undef elf_phdr #undef elf_shdr #undef elf_note #undef elf_addr_t #undef ELF_GNU_PROPERTY_ALIGN #define elfhdr elf32_hdr #define elf_phdr elf32_phdr #define elf_shdr elf32_shdr #define elf_note elf32_note #define elf_addr_t Elf32_Addr #define ELF_GNU_PROPERTY_ALIGN ELF32_GNU_PROPERTY_ALIGN /* * Some data types as stored in coredump. */ #define user_long_t compat_long_t #define user_siginfo_t compat_siginfo_t #define copy_siginfo_to_external copy_siginfo_to_external32 /* * The machine-dependent core note format types are defined in elfcore-compat.h, * which requires asm/elf.h to define compat_elf_gregset_t et al. */ #define elf_prstatus compat_elf_prstatus #define elf_prstatus_common compat_elf_prstatus_common #define elf_prpsinfo compat_elf_prpsinfo #undef ns_to_kernel_old_timeval #define ns_to_kernel_old_timeval ns_to_old_timeval32 /* * To use this file, asm/elf.h must define compat_elf_check_arch. * The other following macros can be defined if the compat versions * differ from the native ones, or omitted when they match. */ #undef elf_check_arch #define elf_check_arch compat_elf_check_arch #ifdef COMPAT_ELF_PLATFORM #undef ELF_PLATFORM #define ELF_PLATFORM COMPAT_ELF_PLATFORM #endif #ifdef COMPAT_ELF_HWCAP #undef ELF_HWCAP #define ELF_HWCAP COMPAT_ELF_HWCAP #endif #ifdef COMPAT_ELF_HWCAP2 #undef ELF_HWCAP2 #define ELF_HWCAP2 COMPAT_ELF_HWCAP2 #endif #ifdef COMPAT_ELF_HWCAP3 #undef ELF_HWCAP3 #define ELF_HWCAP3 COMPAT_ELF_HWCAP3 #endif #ifdef COMPAT_ELF_HWCAP4 #undef ELF_HWCAP4 #define ELF_HWCAP4 COMPAT_ELF_HWCAP4 #endif #ifdef COMPAT_ARCH_DLINFO #undef ARCH_DLINFO #define ARCH_DLINFO COMPAT_ARCH_DLINFO #endif #ifdef COMPAT_ELF_ET_DYN_BASE #undef ELF_ET_DYN_BASE #define ELF_ET_DYN_BASE COMPAT_ELF_ET_DYN_BASE #endif #ifdef COMPAT_ELF_PLAT_INIT #undef ELF_PLAT_INIT #define ELF_PLAT_INIT COMPAT_ELF_PLAT_INIT #endif #ifdef COMPAT_SET_PERSONALITY #undef SET_PERSONALITY #define SET_PERSONALITY COMPAT_SET_PERSONALITY #endif #ifdef compat_start_thread #define COMPAT_START_THREAD(ex, regs, new_ip, new_sp) \ compat_start_thread(regs, new_ip, new_sp) #endif #ifdef COMPAT_START_THREAD #undef START_THREAD #define START_THREAD COMPAT_START_THREAD #endif #ifdef compat_arch_setup_additional_pages #define COMPAT_ARCH_SETUP_ADDITIONAL_PAGES(bprm, ex, interpreter) \ compat_arch_setup_additional_pages(bprm, interpreter) #endif #ifdef COMPAT_ARCH_SETUP_ADDITIONAL_PAGES #undef ARCH_HAS_SETUP_ADDITIONAL_PAGES #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 #undef ARCH_SETUP_ADDITIONAL_PAGES #define ARCH_SETUP_ADDITIONAL_PAGES COMPAT_ARCH_SETUP_ADDITIONAL_PAGES #endif #ifdef compat_elf_read_implies_exec #undef elf_read_implies_exec #define elf_read_implies_exec compat_elf_read_implies_exec #endif /* * Rename a few of the symbols that binfmt_elf.c will define. * These are all local so the names don't really matter, but it * might make some debugging less confusing not to duplicate them. */ #define elf_format compat_elf_format #define init_elf_binfmt init_compat_elf_binfmt #define exit_elf_binfmt exit_compat_elf_binfmt #define binfmt_elf_test_cases compat_binfmt_elf_test_cases #define binfmt_elf_test_suite compat_binfmt_elf_test_suite /* * We share all the actual code with the native (64-bit) version. */ #include "binfmt_elf.c"
