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1 | /* |
2 | * arm sysarch() system call emulation | |
3 | * | |
4 | * Copyright (c) 2013 Stacey D. Son | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #ifndef _TARGET_ARCH_SIGTRAMP_H_ | |
21 | #define _TARGET_ARCH_SIGTRAMP_H_ | |
22 | ||
23 | /* Compare to arm/arm/locore.S ENTRY_NP(sigcode) */ | |
24 | static inline abi_long setup_sigtramp(abi_ulong offset, unsigned sigf_uc, | |
25 | unsigned sys_sigreturn) | |
26 | { | |
27 | int i; | |
28 | uint32_t sys_exit = TARGET_FREEBSD_NR_exit; | |
29 | uint32_t sigtramp_code[] = { | |
30 | /* 1 */ 0xE1A0000D, /* mov r0, sp */ | |
31 | /* 2 */ 0xE2800000 + sigf_uc, /* add r0, r0, #SIGF_UC */ | |
32 | /* 3 */ 0xE59F700C, /* ldr r7, [pc, #12] */ | |
33 | /* 4 */ 0xEF000000 + sys_sigreturn, /* swi (SYS_sigreturn) */ | |
34 | /* 5 */ 0xE59F7008, /* ldr r7, [pc, #8] */ | |
35 | /* 6 */ 0xEF000000 + sys_exit, /* swi (SYS_exit)*/ | |
36 | /* 7 */ 0xEAFFFFFA, /* b . -16 */ | |
37 | /* 8 */ sys_sigreturn, | |
38 | /* 9 */ sys_exit | |
39 | }; | |
40 | ||
41 | G_STATIC_ASSERT(sizeof(sigtramp_code) == TARGET_SZSIGCODE); | |
42 | ||
43 | for (i = 0; i < 9; i++) { | |
44 | tswap32s(&sigtramp_code[i]); | |
45 | } | |
46 | ||
47 | return memcpy_to_target(offset, sigtramp_code, TARGET_SZSIGCODE); | |
48 | } | |
49 | #endif /* _TARGET_ARCH_SIGTRAMP_H_ */ |