| /* |
| * arm sysarch() system call emulation |
| * |
| * Copyright (c) 2013 Stacey D. Son |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * 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/>. |
| */ |
| |
| #ifndef _TARGET_ARCH_SIGTRAMP_H_ |
| #define _TARGET_ARCH_SIGTRAMP_H_ |
| |
| /* Compare to arm/arm/locore.S ENTRY_NP(sigcode) */ |
| static inline abi_long setup_sigtramp(abi_ulong offset, unsigned sigf_uc, |
| unsigned sys_sigreturn) |
| { |
| int i; |
| uint32_t sys_exit = TARGET_FREEBSD_NR_exit; |
| uint32_t sigtramp_code[] = { |
| /* 1 */ 0xE1A0000D, /* mov r0, sp */ |
| /* 2 */ 0xE2800000 + sigf_uc, /* add r0, r0, #SIGF_UC */ |
| /* 3 */ 0xE59F700C, /* ldr r7, [pc, #12] */ |
| /* 4 */ 0xEF000000 + sys_sigreturn, /* swi (SYS_sigreturn) */ |
| /* 5 */ 0xE59F7008, /* ldr r7, [pc, #8] */ |
| /* 6 */ 0xEF000000 + sys_exit, /* swi (SYS_exit)*/ |
| /* 7 */ 0xEAFFFFFA, /* b . -16 */ |
| /* 8 */ sys_sigreturn, |
| /* 9 */ sys_exit |
| }; |
| |
| G_STATIC_ASSERT(sizeof(sigtramp_code) == TARGET_SZSIGCODE); |
| |
| for (i = 0; i < 9; i++) { |
| tswap32s(&sigtramp_code[i]); |
| } |
| |
| return memcpy_to_target(offset, sigtramp_code, TARGET_SZSIGCODE); |
| } |
| #endif /* _TARGET_ARCH_SIGTRAMP_H_ */ |
