summaryrefslogtreecommitdiffstats
path: root/fs/compat_binfmt_elf.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /fs/compat_binfmt_elf.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/compat_binfmt_elf.c')
-rw-r--r--fs/compat_binfmt_elf.c144
1 files changed, 144 insertions, 0 deletions
diff --git a/fs/compat_binfmt_elf.c b/fs/compat_binfmt_elf.c
new file mode 100644
index 0000000000..8f0af4f626
--- /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 <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_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"