1 /* 2 * RISC-V sigcode 3 * 4 * Copyright (c) 2019 Mark Corbin 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 with sigcode() in riscv/riscv/locore.S */ 24 static inline abi_long setup_sigtramp(abi_ulong offset, unsigned sigf_uc, 25 unsigned sys_sigreturn) 26 { 27 uint32_t sys_exit = TARGET_FREEBSD_NR_exit; 28 29 uint32_t sigtramp_code[] = { 30 /*1*/ const_le32(0x00010513), /*mv a0, sp*/ 31 /*2*/ const_le32(0x00050513 + (sigf_uc << 20)), /*addi a0,a0,sigf_uc*/ 32 /*3*/ const_le32(0x00000293 + (sys_sigreturn << 20)),/*li t0,sys_sigreturn*/ 33 /*4*/ const_le32(0x00000073), /*ecall*/ 34 /*5*/ const_le32(0x00000293 + (sys_exit << 20)), /*li t0,sys_exit*/ 35 /*6*/ const_le32(0x00000073), /*ecall*/ 36 /*7*/ const_le32(0xFF1FF06F) /*b -16*/ 37 }; 38 39 return memcpy_to_target(offset, sigtramp_code, TARGET_SZSIGCODE); 40 } 41 #endif /* TARGET_ARCH_SIGTRAMP_H */ 42