From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- fs/compat_binfmt_elf.c | 144 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 144 insertions(+) create mode 100644 fs/compat_binfmt_elf.c (limited to 'fs/compat_binfmt_elf.c') diff --git a/fs/compat_binfmt_elf.c b/fs/compat_binfmt_elf.c new file mode 100644 index 000000000..8f0af4f62 --- /dev/null +++ b/fs/compat_binfmt_elf.c @@ -0,0 +1,144 @@ +// 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 +#include + +#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_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" -- cgit v1.2.3