| /* |
| * sigreturn trampolines for AArch32. |
| * |
| * Copyright (C) 2005-2011 Nicolas Pitre <nico@fluxnic.net> |
| * 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 <http://www.gnu.org/licenses/>. |
| * |
| * |
| * 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. |
| */ |
| |
| #include <asm/unistd.h> |
| |
| .globl __aarch32_sigret_code_start |
| __aarch32_sigret_code_start: |
| |
| /* |
| * ARM Code |
| */ |
| // mov r7, #__NR_compat_sigreturn |
| .byte __NR_compat_sigreturn, 0x70, 0xa0, 0xe3 |
| // svc #__NR_compat_sigreturn |
| .byte __NR_compat_sigreturn, 0x00, 0x00, 0xef |
| |
| /* |
| * Thumb code |
| */ |
| // svc #__NR_compat_sigreturn |
| .byte __NR_compat_sigreturn, 0x27 |
| // mov r7, #__NR_compat_sigreturn |
| .byte __NR_compat_sigreturn, 0xdf |
| |
| /* |
| * ARM code |
| */ |
| // mov r7, #__NR_compat_rt_sigreturn |
| .byte __NR_compat_rt_sigreturn, 0x70, 0xa0, 0xe3 |
| // svc #__NR_compat_rt_sigreturn |
| .byte __NR_compat_rt_sigreturn, 0x00, 0x00, 0xef |
| |
| /* |
| * Thumb code |
| */ |
| // svc #__NR_compat_rt_sigreturn |
| .byte __NR_compat_rt_sigreturn, 0x27 |
| // mov r7, #__NR_compat_rt_sigreturn |
| .byte __NR_compat_rt_sigreturn, 0xdf |
| |
| .globl __aarch32_sigret_code_end |
| __aarch32_sigret_code_end: |
