mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
873b73c0c8
qemu/linux-user/alpha/signal.c
Laurent Vivier 9850f9f63a linux-user: move get_sp_from_cpustate() to target_cpu.h 
Remove useless includes
Fix HPPA include guard.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20180529194207.31503-9-laurent@vivier.eu>
2018-06-04 01:30:44 +02:00

275 lines
7.6 KiB
C
Raw Blame History

/*
* Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "signal-common.h"
#include "linux-user/trace.h"
struct target_sigcontext {
abi_long sc_onstack;
abi_long sc_mask;
abi_long sc_pc;
abi_long sc_ps;
abi_long sc_regs[32];
abi_long sc_ownedfp;
abi_long sc_fpregs[32];
abi_ulong sc_fpcr;
abi_ulong sc_fp_control;
abi_ulong sc_reserved1;
abi_ulong sc_reserved2;
abi_ulong sc_ssize;
abi_ulong sc_sbase;
abi_ulong sc_traparg_a0;
abi_ulong sc_traparg_a1;
abi_ulong sc_traparg_a2;
abi_ulong sc_fp_trap_pc;
abi_ulong sc_fp_trigger_sum;
abi_ulong sc_fp_trigger_inst;
};
struct target_ucontext {
abi_ulong tuc_flags;
abi_ulong tuc_link;
abi_ulong tuc_osf_sigmask;
target_stack_t tuc_stack;
struct target_sigcontext tuc_mcontext;
target_sigset_t tuc_sigmask;
};
struct target_sigframe {
struct target_sigcontext sc;
unsigned int retcode[3];
};
struct target_rt_sigframe {
target_siginfo_t info;
struct target_ucontext uc;
unsigned int retcode[3];
};
#define INSN_MOV_R30_R16 0x47fe0410
#define INSN_LDI_R0 0x201f0000
#define INSN_CALLSYS 0x00000083
static void setup_sigcontext(struct target_sigcontext *sc, CPUAlphaState *env,
abi_ulong frame_addr, target_sigset_t *set)
{
int i;
__put_user(on_sig_stack(frame_addr), &sc->sc_onstack);
__put_user(set->sig[0], &sc->sc_mask);
__put_user(env->pc, &sc->sc_pc);
__put_user(8, &sc->sc_ps);
for (i = 0; i < 31; ++i) {
__put_user(env->ir[i], &sc->sc_regs[i]);
}
__put_user(0, &sc->sc_regs[31]);
for (i = 0; i < 31; ++i) {
__put_user(env->fir[i], &sc->sc_fpregs[i]);
}
__put_user(0, &sc->sc_fpregs[31]);
__put_user(cpu_alpha_load_fpcr(env), &sc->sc_fpcr);
__put_user(0, &sc->sc_traparg_a0); /* FIXME */
__put_user(0, &sc->sc_traparg_a1); /* FIXME */
__put_user(0, &sc->sc_traparg_a2); /* FIXME */
}
static void restore_sigcontext(CPUAlphaState *env,
struct target_sigcontext *sc)
{
uint64_t fpcr;
int i;
__get_user(env->pc, &sc->sc_pc);
for (i = 0; i < 31; ++i) {
__get_user(env->ir[i], &sc->sc_regs[i]);
}
for (i = 0; i < 31; ++i) {
__get_user(env->fir[i], &sc->sc_fpregs[i]);
}
__get_user(fpcr, &sc->sc_fpcr);
cpu_alpha_store_fpcr(env, fpcr);
}
static inline abi_ulong get_sigframe(struct target_sigaction *sa,
CPUAlphaState *env,
unsigned long framesize)
{
abi_ulong sp;
sp = target_sigsp(get_sp_from_cpustate(env), sa);
return (sp - framesize) & -32;
}
void setup_frame(int sig, struct target_sigaction *ka,
target_sigset_t *set, CPUAlphaState *env)
{
abi_ulong frame_addr, r26;
struct target_sigframe *frame;
int err = 0;
frame_addr = get_sigframe(ka, env, sizeof(*frame));
trace_user_setup_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
goto give_sigsegv;
}
setup_sigcontext(&frame->sc, env, frame_addr, set);
if (ka->sa_restorer) {
r26 = ka->sa_restorer;
} else {
__put_user(INSN_MOV_R30_R16, &frame->retcode[0]);
__put_user(INSN_LDI_R0 + TARGET_NR_sigreturn,
&frame->retcode[1]);
__put_user(INSN_CALLSYS, &frame->retcode[2]);
/* imb() */
r26 = frame_addr + offsetof(struct target_sigframe, retcode);
}
unlock_user_struct(frame, frame_addr, 1);
if (err) {
give_sigsegv:
force_sigsegv(sig);
return;
}
env->ir[IR_RA] = r26;
env->ir[IR_PV] = env->pc = ka->_sa_handler;
env->ir[IR_A0] = sig;
env->ir[IR_A1] = 0;
env->ir[IR_A2] = frame_addr + offsetof(struct target_sigframe, sc);
env->ir[IR_SP] = frame_addr;
}
void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUAlphaState *env)
{
abi_ulong frame_addr, r26;
struct target_rt_sigframe *frame;
int i, err = 0;
frame_addr = get_sigframe(ka, env, sizeof(*frame));
trace_user_setup_rt_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
goto give_sigsegv;
}
tswap_siginfo(&frame->info, info);
__put_user(0, &frame->uc.tuc_flags);
__put_user(0, &frame->uc.tuc_link);
__put_user(set->sig[0], &frame->uc.tuc_osf_sigmask);
target_save_altstack(&frame->uc.tuc_stack, env);
setup_sigcontext(&frame->uc.tuc_mcontext, env, frame_addr, set);
for (i = 0; i < TARGET_NSIG_WORDS; ++i) {
__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
}
if (ka->sa_restorer) {
r26 = ka->sa_restorer;
} else {
__put_user(INSN_MOV_R30_R16, &frame->retcode[0]);
__put_user(INSN_LDI_R0 + TARGET_NR_rt_sigreturn,
&frame->retcode[1]);
__put_user(INSN_CALLSYS, &frame->retcode[2]);
/* imb(); */
r26 = frame_addr + offsetof(struct target_sigframe, retcode);
}
if (err) {
give_sigsegv:
force_sigsegv(sig);
return;
}
env->ir[IR_RA] = r26;
env->ir[IR_PV] = env->pc = ka->_sa_handler;
env->ir[IR_A0] = sig;
env->ir[IR_A1] = frame_addr + offsetof(struct target_rt_sigframe, info);
env->ir[IR_A2] = frame_addr + offsetof(struct target_rt_sigframe, uc);
env->ir[IR_SP] = frame_addr;
}
long do_sigreturn(CPUAlphaState *env)
{
struct target_sigcontext *sc;
abi_ulong sc_addr = env->ir[IR_A0];
target_sigset_t target_set;
sigset_t set;
if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1)) {
goto badframe;
}
target_sigemptyset(&target_set);
__get_user(target_set.sig[0], &sc->sc_mask);
target_to_host_sigset_internal(&set, &target_set);
set_sigmask(&set);
restore_sigcontext(env, sc);
unlock_user_struct(sc, sc_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}
long do_rt_sigreturn(CPUAlphaState *env)
{
abi_ulong frame_addr = env->ir[IR_A0];
struct target_rt_sigframe *frame;
sigset_t set;
trace_user_do_rt_sigreturn(env, frame_addr);
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
goto badframe;
}
target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
set_sigmask(&set);
restore_sigcontext(env, &frame->uc.tuc_mcontext);
if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe,
uc.tuc_stack),
0, env->ir[IR_SP]) == -EFAULT) {
goto badframe;
}
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
unlock_user_struct(frame, frame_addr, 0);
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}
Reference in New Issue View Git Blame Copy Permalink