Commit 7bb20b8c authored by Yury Norov's avatar Yury Norov Committed by Jinjie Ruan
Browse files

arm64: ilp32: introduce binfmt_ilp32.c 

maillist inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8JVJ3
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: default avatarYury Norov <ynorov@caviumnetworks.com>
Signed-off-by: default avatarBamvor Jian Zhang <bamv2005@gmail.com>
Signed-off-by: default avatarYury Norov <ynorov@marvell.com>
Signed-off-by: default avatarXiongfeng Wang <wangxiongfeng2@huawei.com>
Acked-by: default avatarXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: default avatarChen Jun <chenjun102@huawei.com>
Signed-off-by: default avatarChen Jiahao <chenjiahao16@huawei.com>

Conflicts:
	arch/arm64/kernel/Makefile

Signed-off-by: default avatarJinjie Ruan <ruanjinjie@huawei.com>
parent e218c611

arch/arm64/kernel/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -41,6 +41,7 @@ obj-$(CONFIG_AARCH32_EL0) += binfmt_elf32.o sys32.o signal32.o \ 
obj-$(CONFIG_AARCH32_EL0)		+= sigreturn32.o

obj-$(CONFIG_COMPAT_ALIGNMENT_FIXUPS)	+= compat_alignment.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 module-plts.o

obj-$(CONFIG_PERF_EVENTS)		+= perf_regs.o perf_callchain.o

arch/arm64/kernel/binfmt_ilp32.c

0 → 100644
+89 −0
Original line number Diff line number Diff line 
// 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

#define elf_prstatus_common	compat_elf_prstatus_common



/* 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"