From: Mark Corbin <m...@dibsco.co.uk> Implemented the `setup_sigtramp` function for setting up the signal trampoline code in the RISC-V architecture.
Signed-off-by: Mark Corbin <m...@dibsco.co.uk> Signed-off-by: Ajeet Singh <itac...@freebsd.org> Reviewed-by: Richard Henderson <richard.hender...@linaro.org> --- bsd-user/riscv/target_arch_sigtramp.h | 46 +++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 bsd-user/riscv/target_arch_sigtramp.h diff --git a/bsd-user/riscv/target_arch_sigtramp.h b/bsd-user/riscv/target_arch_sigtramp.h new file mode 100644 index 0000000000..39c878db22 --- /dev/null +++ b/bsd-user/riscv/target_arch_sigtramp.h @@ -0,0 +1,46 @@ +/* + * 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) +{ + int i; + uint32_t sys_exit = TARGET_FREEBSD_NR_exit; + + uint32_t sigtramp_code[] = { + /* 1 */ 0x00010513, /* mv a0, sp */ + /* 2 */ 0x00050513 + (sigf_uc << 20), /* addi a0, a0, sigf_uc */ + /* 3 */ 0x00000293 + (sys_sigreturn << 20), /* li t0, sys_sigreturn */ + /* 4 */ 0x00000073, /* ecall */ + /* 5 */ 0x00000293 + (sys_exit << 20), /* li t0, sys_exit */ + /* 6 */ 0x00000073, /* ecall */ + /* 7 */ 0xFF1FF06F /* b -16 */ + }; + + for (i = 0; i < 7; i++) { + tswap32s(&sigtramp_code[i]); + } + + return memcpy_to_target(offset, sigtramp_code, TARGET_SZSIGCODE); +} +#endif /* TARGET_ARCH_SIGTRAMP_H */ -- 2.34.1
