diff options
| author | Mark Corbin <mark@dibsco.co.uk> | 2024-09-17 01:51:09 +1000 |
|---|---|---|
| committer | Alistair Francis <alistair.francis@wdc.com> | 2024-10-02 15:11:52 +1000 |
| commit | 640232501227145c569312d749eb64d24e6deaac (patch) | |
| tree | b8ee34e82c988aca546b7f6ec2c648d994e49d0e /bsd-user | |
| parent | 2bf79222ce97156f395d3c214897d7a4f8fecc85 (diff) | |
bsd-user: Add RISC-V signal trampoline setup function
Implemented the 'setup_sigtramp' function for setting up the signal
trampoline code in the RISC-V architecture.
Signed-off-by: Mark Corbin <mark@dibsco.co.uk>
Signed-off-by: Ajeet Singh <itachis@FreeBSD.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20240916155119.14610-8-itachis@FreeBSD.org>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Diffstat (limited to 'bsd-user')
| -rw-r--r-- | bsd-user/riscv/target_arch_sigtramp.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/bsd-user/riscv/target_arch_sigtramp.h b/bsd-user/riscv/target_arch_sigtramp.h new file mode 100644 index 0000000000..dfe5076739 --- /dev/null +++ b/bsd-user/riscv/target_arch_sigtramp.h @@ -0,0 +1,41 @@ +/* + * RISC-V sigcode + * + * Copyright (c) 2019 Mark Corbin + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef TARGET_ARCH_SIGTRAMP_H +#define TARGET_ARCH_SIGTRAMP_H + +/* Compare with sigcode() in riscv/riscv/locore.S */ +static inline abi_long setup_sigtramp(abi_ulong offset, unsigned sigf_uc, + unsigned sys_sigreturn) +{ + uint32_t sys_exit = TARGET_FREEBSD_NR_exit; + + uint32_t sigtramp_code[] = { + /*1*/ const_le32(0x00010513), /*mv a0, sp*/ + /*2*/ const_le32(0x00050513 + (sigf_uc << 20)), /*addi a0,a0,sigf_uc*/ + /*3*/ const_le32(0x00000293 + (sys_sigreturn << 20)),/*li t0,sys_sigreturn*/ + /*4*/ const_le32(0x00000073), /*ecall*/ + /*5*/ const_le32(0x00000293 + (sys_exit << 20)), /*li t0,sys_exit*/ + /*6*/ const_le32(0x00000073), /*ecall*/ + /*7*/ const_le32(0xFF1FF06F) /*b -16*/ + }; + + return memcpy_to_target(offset, sigtramp_code, TARGET_SZSIGCODE); +} +#endif /* TARGET_ARCH_SIGTRAMP_H */ |