64 lines
2.0 KiB
C
64 lines
2.0 KiB
C
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/*
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* RISC-V signal definitions
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*
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* Copyright (c) 2019 Mark Corbin
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "qemu.h"
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/*
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* Compare with sendsig() in riscv/riscv/exec_machdep.c
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* Assumes that target stack frame memory is locked.
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*/
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abi_long
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set_sigtramp_args(CPURISCVState *regs, int sig, struct target_sigframe *frame,
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abi_ulong frame_addr, struct target_sigaction *ka)
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{
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/*
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* Arguments to signal handler:
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* a0 (10) = signal number
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* a1 (11) = siginfo pointer
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* a2 (12) = ucontext pointer
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* pc = signal pointer handler
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* sp (2) = sigframe pointer
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* ra (1) = sigtramp at base of user stack
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*/
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regs->gpr[xA0] = sig;
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regs->gpr[xA1] = frame_addr +
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offsetof(struct target_sigframe, sf_si);
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regs->gpr[xA2] = frame_addr +
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offsetof(struct target_sigframe, sf_uc);
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regs->pc = ka->_sa_handler;
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regs->gpr[xSP] = frame_addr;
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regs->gpr[xRA] = TARGET_PS_STRINGS - TARGET_SZSIGCODE;
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return 0;
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}
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/*
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* Compare to riscv/riscv/exec_machdep.c sendsig()
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* Assumes that the memory is locked if frame points to user memory.
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*/
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abi_long setup_sigframe_arch(CPURISCVState *env, abi_ulong frame_addr,
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struct target_sigframe *frame, int flags)
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{
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target_mcontext_t *mcp = &frame->sf_uc.uc_mcontext;
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get_mcontext(env, mcp, flags);
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return 0;
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}
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