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 */
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 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