54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
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/*
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* ARM AArch64 specific signal definitions for bsd-user
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*
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* Copyright (c) 2015 Stacey D. Son <sson at FreeBSD>
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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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#include "qemu/osdep.h"
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#include "qemu.h"
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/*
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* Compare to sendsig() in sys/arm64/arm64/machdep.c
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* Assumes that target stack frame memory is locked.
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*/
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abi_long set_sigtramp_args(CPUARMState *regs, int sig,
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struct target_sigframe *frame,
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abi_ulong frame_addr,
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struct target_sigaction *ka)
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{
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/*
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* Arguments to signal handler:
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* x0 = signal number
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* x1 = siginfo pointer
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* x2 = ucontext pointer
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* pc/elr = signal handler pointer
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* sp = sigframe struct pointer
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* lr = sigtramp at base of user stack
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*/
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regs->xregs[0] = sig;
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regs->xregs[1] = frame_addr +
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offsetof(struct target_sigframe, sf_si);
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regs->xregs[2] = 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->xregs[TARGET_REG_SP] = frame_addr;
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regs->xregs[TARGET_REG_LR] = TARGET_PS_STRINGS - TARGET_SZSIGCODE;
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return 0;
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}
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