1 /* 2 * ARM AArch64 sigcode for bsd-user 3 * 4 * Copyright (c) 2015 Stacey D. Son <sson at FreeBSD> 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library 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 GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; 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 ENTRY(sigcode) in arm64/arm64/locore.S */ 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 30 uint32_t sigtramp_code[] = { 31 /* 1 */ 0x910003e0, /* mov x0, sp */ 32 /* 2 */ 0x91000000 + (sigf_uc << 10), /* add x0, x0, #SIGF_UC */ 33 /* 3 */ 0xd2800000 + (sys_sigreturn << 5) + 0x8, /* mov x8, #SYS_sigreturn */ 34 /* 4 */ 0xd4000001, /* svc #0 */ 35 /* 5 */ 0xd2800028 + (sys_exit << 5) + 0x8, /* mov x8, #SYS_exit */ 36 /* 6 */ 0xd4000001, /* svc #0 */ 37 /* 7 */ 0x17fffffc, /* b -4 */ 38 /* 8 */ sys_sigreturn, 39 /* 9 */ sys_exit 40 }; 41 42 for (i = 0; i < 9; i++) { 43 tswap32s(&sigtramp_code[i]); 44 } 45 46 return memcpy_to_target(offset, sigtramp_code, TARGET_SZSIGCODE); 47 } 48 #endif /* TARGET_ARCH_SIGTRAMP_H */ 49