42 lines
1.6 KiB
C
42 lines
1.6 KiB
C
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/*
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* RISC-V sigcode
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*
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* Copyright (c) 2019 Mark Corbin
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef TARGET_ARCH_SIGTRAMP_H
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#define TARGET_ARCH_SIGTRAMP_H
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/* Compare with sigcode() in riscv/riscv/locore.S */
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static inline abi_long setup_sigtramp(abi_ulong offset, unsigned sigf_uc,
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unsigned sys_sigreturn)
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{
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uint32_t sys_exit = TARGET_FREEBSD_NR_exit;
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uint32_t sigtramp_code[] = {
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/*1*/ const_le32(0x00010513), /*mv a0, sp*/
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/*2*/ const_le32(0x00050513 + (sigf_uc << 20)), /*addi a0,a0,sigf_uc*/
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/*3*/ const_le32(0x00000293 + (sys_sigreturn << 20)),/*li t0,sys_sigreturn*/
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/*4*/ const_le32(0x00000073), /*ecall*/
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/*5*/ const_le32(0x00000293 + (sys_exit << 20)), /*li t0,sys_exit*/
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/*6*/ const_le32(0x00000073), /*ecall*/
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/*7*/ const_le32(0xFF1FF06F) /*b -16*/
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};
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return memcpy_to_target(offset, sigtramp_code, TARGET_SZSIGCODE);
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}
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#endif /* TARGET_ARCH_SIGTRAMP_H */
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