target_arch_sigtramp.h (1802B)
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 */