diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile index a30bbecb23d8..c18c34d56029 100644 --- a/arch/arm64/kernel/Makefile +++ b/arch/arm64/kernel/Makefile @@ -28,7 +28,7 @@ $(obj)/%.stub.o: $(obj)/%.o FORCE $(call if_changed,objcopy) obj-$(CONFIG_COMPAT) += sys32.o kuser32.o signal32.o \ - sys_compat.o + sigreturn32.o sys_compat.o obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o entry-ftrace.o obj-$(CONFIG_MODULES) += module.o obj-$(CONFIG_ARM64_MODULE_PLTS) += module-plts.o diff --git a/arch/arm64/kernel/kuser32.S b/arch/arm64/kernel/kuser32.S index 997e6b27ff6a..c5f2bbafd723 100644 --- a/arch/arm64/kernel/kuser32.S +++ b/arch/arm64/kernel/kuser32.S @@ -1,24 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0 */ /* - * Low-level user helpers placed in the vectors page for AArch32. + * AArch32 user helpers. * Based on the kuser helpers in arch/arm/kernel/entry-armv.S. * * Copyright (C) 2005-2011 Nicolas Pitre - * Copyright (C) 2012 ARM Ltd. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see . - * - * - * AArch32 user helpers. + * Copyright (C) 2012-2018 ARM Ltd. * * Each segment is 32-byte aligned and will be moved to the top of the high * vector page. New segments (if ever needed) must be added in front of @@ -77,42 +63,3 @@ __kuser_helper_version: // 0xffff0ffc .word ((__kuser_helper_end - __kuser_helper_start) >> 5) .globl __kuser_helper_end __kuser_helper_end: - -/* - * AArch32 sigreturn code - * - * For ARM syscalls, the syscall number has to be loaded into r7. - * We do not support an OABI userspace. - * - * For Thumb syscalls, we also pass the syscall number via r7. We therefore - * need two 16-bit instructions. - */ - .globl __aarch32_sigret_code_start -__aarch32_sigret_code_start: - - /* - * ARM Code - */ - .byte __NR_compat_sigreturn, 0x70, 0xa0, 0xe3 // mov r7, #__NR_compat_sigreturn - .byte __NR_compat_sigreturn, 0x00, 0x00, 0xef // svc #__NR_compat_sigreturn - - /* - * Thumb code - */ - .byte __NR_compat_sigreturn, 0x27 // svc #__NR_compat_sigreturn - .byte __NR_compat_sigreturn, 0xdf // mov r7, #__NR_compat_sigreturn - - /* - * ARM code - */ - .byte __NR_compat_rt_sigreturn, 0x70, 0xa0, 0xe3 // mov r7, #__NR_compat_rt_sigreturn - .byte __NR_compat_rt_sigreturn, 0x00, 0x00, 0xef // svc #__NR_compat_rt_sigreturn - - /* - * Thumb code - */ - .byte __NR_compat_rt_sigreturn, 0x27 // svc #__NR_compat_rt_sigreturn - .byte __NR_compat_rt_sigreturn, 0xdf // mov r7, #__NR_compat_rt_sigreturn - - .globl __aarch32_sigret_code_end -__aarch32_sigret_code_end: diff --git a/arch/arm64/kernel/sigreturn32.S b/arch/arm64/kernel/sigreturn32.S new file mode 100644 index 000000000000..475d30d471ac --- /dev/null +++ b/arch/arm64/kernel/sigreturn32.S @@ -0,0 +1,46 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * AArch32 sigreturn code. + * Based on the kuser helpers in arch/arm/kernel/entry-armv.S. + * + * Copyright (C) 2005-2011 Nicolas Pitre + * Copyright (C) 2012-2018 ARM Ltd. + * + * For ARM syscalls, the syscall number has to be loaded into r7. + * We do not support an OABI userspace. + * + * For Thumb syscalls, we also pass the syscall number via r7. We therefore + * need two 16-bit instructions. + */ + +#include + + .globl __aarch32_sigret_code_start +__aarch32_sigret_code_start: + + /* + * ARM Code + */ + .byte __NR_compat_sigreturn, 0x70, 0xa0, 0xe3 // mov r7, #__NR_compat_sigreturn + .byte __NR_compat_sigreturn, 0x00, 0x00, 0xef // svc #__NR_compat_sigreturn + + /* + * Thumb code + */ + .byte __NR_compat_sigreturn, 0x27 // svc #__NR_compat_sigreturn + .byte __NR_compat_sigreturn, 0xdf // mov r7, #__NR_compat_sigreturn + + /* + * ARM code + */ + .byte __NR_compat_rt_sigreturn, 0x70, 0xa0, 0xe3 // mov r7, #__NR_compat_rt_sigreturn + .byte __NR_compat_rt_sigreturn, 0x00, 0x00, 0xef // svc #__NR_compat_rt_sigreturn + + /* + * Thumb code + */ + .byte __NR_compat_rt_sigreturn, 0x27 // svc #__NR_compat_rt_sigreturn + .byte __NR_compat_rt_sigreturn, 0xdf // mov r7, #__NR_compat_rt_sigreturn + + .globl __aarch32_sigret_code_end +__aarch32_sigret_code_end: