提交 3bf24ffc 编写于 作者: Y Yury Norov 提交者: Chen Jun

arm64: ilp32: introduce binfmt_ilp32.c

maillist inclusion
category: feature
bugzilla: 46790
CVE: NA

Reference: https://github.com/norov/linux/commits/ilp32-5.2

--------------------------------

Like binfmt_elf32.c for AARCH32, binfmt_ilp32.c is needed to handle
ILP32 binaries.
Signed-off-by: NYury Norov <ynorov@caviumnetworks.com>
Signed-off-by: NBamvor Jian Zhang <bamv2005@gmail.com>
Signed-off-by: NYury Norov <ynorov@marvell.com>
Signed-off-by: NXiongfeng Wang <wangxiongfeng2@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
上级 14b7a14d
......@@ -29,6 +29,7 @@ obj-$(CONFIG_AARCH32_EL0) += binfmt_elf32.o sys32.o signal32.o \
sys_compat.o
obj-$(CONFIG_AARCH32_EL0) += sigreturn32.o
obj-$(CONFIG_KUSER_HELPERS) += kuser32.o
obj-$(CONFIG_ARM64_ILP32) += binfmt_ilp32.o
obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o entry-ftrace.o
obj-$(CONFIG_MODULES) += module.o
obj-$(CONFIG_ARM64_MODULE_PLTS) += module-plts.o
......
// SPDX-License-Identifier: GPL-2.0
/*
* Support for ILP32 Linux/aarch64 ELF binaries.
*/
#undef CONFIG_AARCH32_EL0
#define compat_elf_gregset_t elf_gregset_t
#include <linux/elfcore-compat.h>
#include <linux/time.h>
#include <asm/cpufeature.h>
#undef ELF_CLASS
#define ELF_CLASS ELFCLASS32
#undef elfhdr
#undef elf_phdr
#undef elf_shdr
#undef elf_note
#undef elf_addr_t
#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
/*
* 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_prpsinfo compat_elf_prpsinfo
/* AARCH64 ILP32 EABI. */
#undef elf_check_arch
#define elf_check_arch(x) (((x)->e_machine == EM_AARCH64) \
&& (x)->e_ident[EI_CLASS] == ELFCLASS32)
#undef SET_PERSONALITY
#define SET_PERSONALITY(ex) \
do { \
set_bit(TIF_32BIT, &current->mm->context.flags); \
set_thread_flag(TIF_32BIT_AARCH64); \
clear_thread_flag(TIF_32BIT); \
} while (0)
#undef ARCH_DLINFO
#define ARCH_DLINFO \
do { \
NEW_AUX_ENT(AT_SYSINFO_EHDR, \
(elf_addr_t)(long)current->mm->context.vdso); \
} while (0)
#undef ELF_PLATFORM
#ifdef __AARCH64EB__
#define ELF_PLATFORM ("aarch64_be:ilp32")
#else
#define ELF_PLATFORM ("aarch64:ilp32")
#endif
#undef ELF_ET_DYN_BASE
#define ELF_ET_DYN_BASE COMPAT_ELF_ET_DYN_BASE
#undef ELF_HWCAP
#undef ELF_HWCAP2
#define ELF_HWCAP cpu_get_elf_hwcap()
#define ELF_HWCAP2 cpu_get_elf_hwcap2()
/*
* 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
#undef ns_to_kernel_old_timeval
#define ns_to_kernel_old_timeval ns_to_old_timeval32
#include "../../../fs/binfmt_elf.c"
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