/* * 32-bit compatibility support for ELF format executables and core dumps. * * Copyright (C) 2007 Red Hat, Inc. All rights reserved. * * This copyrighted material is made available to anyone wishing to use, * modify, copy, or redistribute it subject to the terms and conditions * of the GNU General Public License v.2. * * 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> /* * 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_note #undef elf_addr_t #define elfhdr elf32_hdr #define elf_phdr elf32_phdr #define elf_note elf32_note #define elf_addr_t Elf32_Addr /* * 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_prpsinfo compat_elf_prpsinfo /* * Compat version of cputime_to_compat_timeval, perhaps this * should be an inline in <linux/compat.h>. */ static void cputime_to_compat_timeval(const cputime_t cputime, struct compat_timeval *value) { struct timeval tv; cputime_to_timeval(cputime, &tv); value->tv_sec = tv.tv_sec; value->tv_usec = tv.tv_usec; } #undef cputime_to_timeval #define cputime_to_timeval cputime_to_compat_timeval /* * 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_ARCH #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_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_EXEC_PAGESIZE #undef ELF_EXEC_PAGESIZE #define ELF_EXEC_PAGESIZE COMPAT_ELF_EXEC_PAGESIZE #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 #undef start_thread #define start_thread compat_start_thread #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 /* * 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 /* * We share all the actual code with the native (64-bit) version. */ #include "binfmt_elf.c"