1 /* 2 * ARM AArch64 specific signal definitions for bsd-user 3 * 4 * Copyright (c) 2015 Stacey D. Son <sson at FreeBSD> 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 #include "qemu/osdep.h" 20 21 #include "qemu.h" 22 23 /* 24 * Compare to sendsig() in sys/arm64/arm64/machdep.c 25 * Assumes that target stack frame memory is locked. 26 */ 27 abi_long set_sigtramp_args(CPUARMState *regs, int sig, 28 struct target_sigframe *frame, 29 abi_ulong frame_addr, 30 struct target_sigaction *ka) 31 { 32 /* 33 * Arguments to signal handler: 34 * x0 = signal number 35 * x1 = siginfo pointer 36 * x2 = ucontext pointer 37 * pc/elr = signal handler pointer 38 * sp = sigframe struct pointer 39 * lr = sigtramp at base of user stack 40 */ 41 42 regs->xregs[0] = sig; 43 regs->xregs[1] = frame_addr + 44 offsetof(struct target_sigframe, sf_si); 45 regs->xregs[2] = frame_addr + 46 offsetof(struct target_sigframe, sf_uc); 47 48 regs->pc = ka->_sa_handler; 49 regs->xregs[TARGET_REG_SP] = frame_addr; 50 regs->xregs[TARGET_REG_LR] = TARGET_PS_STRINGS - TARGET_SZSIGCODE; 51 52 return 0; 53 } 54