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) */
setup_sigtramp(abi_ulong offset,unsigned sigf_uc,unsigned sys_sigreturn)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 */
50