diff options
Diffstat (limited to 'bsd-user/aarch64/signal.c')
| -rw-r--r-- | bsd-user/aarch64/signal.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/bsd-user/aarch64/signal.c b/bsd-user/aarch64/signal.c new file mode 100644 index 0000000000..6bc73a798f --- /dev/null +++ b/bsd-user/aarch64/signal.c @@ -0,0 +1,137 @@ +/* + * ARM AArch64 specific signal definitions for bsd-user + * + * Copyright (c) 2015 Stacey D. Son <sson at FreeBSD> + * + * 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/>. + */ +#include "qemu/osdep.h" + +#include "qemu.h" + +/* + * Compare to sendsig() in sys/arm64/arm64/exec_machdep.c + * Assumes that target stack frame memory is locked. + */ +abi_long set_sigtramp_args(CPUARMState *regs, int sig, + struct target_sigframe *frame, + abi_ulong frame_addr, + struct target_sigaction *ka) +{ + /* + * Arguments to signal handler: + * x0 = signal number + * x1 = siginfo pointer + * x2 = ucontext pointer + * pc/elr = signal handler pointer + * sp = sigframe struct pointer + * lr = sigtramp at base of user stack + */ + + regs->xregs[0] = sig; + regs->xregs[1] = frame_addr + + offsetof(struct target_sigframe, sf_si); + regs->xregs[2] = frame_addr + + offsetof(struct target_sigframe, sf_uc); + + regs->pc = ka->_sa_handler; + regs->xregs[TARGET_REG_SP] = frame_addr; + regs->xregs[TARGET_REG_LR] = TARGET_PS_STRINGS - TARGET_SZSIGCODE; + + return 0; +} + +/* + * Compare to get_mcontext() in arm64/arm64/machdep.c + * Assumes that the memory is locked if mcp points to user memory. + */ +abi_long get_mcontext(CPUARMState *regs, target_mcontext_t *mcp, int flags) +{ + int err = 0, i; + uint64_t *gr = mcp->mc_gpregs.gp_x; + + mcp->mc_gpregs.gp_spsr = pstate_read(regs); + if (flags & TARGET_MC_GET_CLEAR_RET) { + gr[0] = 0UL; + mcp->mc_gpregs.gp_spsr &= ~CPSR_C; + } else { + gr[0] = tswap64(regs->xregs[0]); + } + + for (i = 1; i < 30; i++) { + gr[i] = tswap64(regs->xregs[i]); + } + + mcp->mc_gpregs.gp_sp = tswap64(regs->xregs[TARGET_REG_SP]); + mcp->mc_gpregs.gp_lr = tswap64(regs->xregs[TARGET_REG_LR]); + mcp->mc_gpregs.gp_elr = tswap64(regs->pc); + + /* XXX FP? */ + + return err; +} + +/* + * Compare to arm64/arm64/exec_machdep.c sendsig() + * Assumes that the memory is locked if frame points to user memory. + */ +abi_long setup_sigframe_arch(CPUARMState *env, abi_ulong frame_addr, + struct target_sigframe *frame, int flags) +{ + target_mcontext_t *mcp = &frame->sf_uc.uc_mcontext; + + get_mcontext(env, mcp, flags); + return 0; +} + +/* + * Compare to set_mcontext() in arm64/arm64/machdep.c + * Assumes that the memory is locked if frame points to user memory. + */ +abi_long set_mcontext(CPUARMState *regs, target_mcontext_t *mcp, int srflag) +{ + int err = 0, i; + const uint64_t *gr = mcp->mc_gpregs.gp_x; + + for (i = 0; i < 30; i++) { + regs->xregs[i] = tswap64(gr[i]); + } + + regs->xregs[TARGET_REG_SP] = tswap64(mcp->mc_gpregs.gp_sp); + regs->xregs[TARGET_REG_LR] = tswap64(mcp->mc_gpregs.gp_lr); + regs->pc = mcp->mc_gpregs.gp_elr; + pstate_write(regs, mcp->mc_gpregs.gp_spsr); + + /* XXX FP? */ + + return err; +} + +/* Compare to sys_sigreturn() in arm64/arm64/machdep.c */ +abi_long get_ucontext_sigreturn(CPUARMState *regs, abi_ulong target_sf, + abi_ulong *target_uc) +{ + uint32_t pstate = pstate_read(regs); + + *target_uc = 0; + + if ((pstate & PSTATE_M) != PSTATE_MODE_EL0t || + (pstate & (PSTATE_F | PSTATE_I | PSTATE_A | PSTATE_D)) != 0) { + return -TARGET_EINVAL; + } + + *target_uc = target_sf; + + return 0; +} |