| 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 */ |