mirror of
https://github.com/torvalds/linux.git
synced 2024-11-25 21:51:40 +00:00
f2485a2dc9
Preparations to doing i386 compat elf_prstatus sanely - rather than duplicating the beginning of compat_elf_prstatus, take these fields into a separate structure (compat_elf_prstatus_common), so that it could be reused. Due to the incestous relationship between binfmt_elf.c and compat_binfmt_elf.c we need the same shape change done to native struct elf_prstatus, gathering the fields prior to pr_reg into a new structure (struct elf_prstatus_common). Fortunately, offset of pr_reg is always a multiple of 16 with no padding right before it, so it's possible to turn all the stuff prior to it into a single member without disturbing the layout. [build fix from Geert Uytterhoeven folded in] Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
157 lines
4.0 KiB
C
157 lines
4.0 KiB
C
// 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_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_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_EXEC_PAGESIZE
|
|
#undef ELF_EXEC_PAGESIZE
|
|
#define ELF_EXEC_PAGESIZE COMPAT_ELF_EXEC_PAGESIZE
|
|
#endif
|
|
|
|
#ifdef COMPAT_PRSTATUS_SIZE
|
|
#define PRSTATUS_SIZE COMPAT_PRSTATUS_SIZE
|
|
#endif
|
|
|
|
#ifdef COMPAT_SET_PR_FPVALID
|
|
#define SET_PR_FPVALID(S) COMPAT_SET_PR_FPVALID(S)
|
|
#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
|
|
|
|
/*
|
|
* We share all the actual code with the native (64-bit) version.
|
|
*/
|
|
#include "binfmt_elf.c"
|