mirror of https://gitlab.com/qemu-project/qemu
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
138 lines
3.9 KiB
C
138 lines
3.9 KiB
C
/*
|
|
* 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;
|
|
}
|