* 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 "config.h"
+#include "qemu/osdep.h"
#include "cpu.h"
#include "disas/disas.h"
+#include "exec/exec-all.h"
#include "tcg.h"
#include "qemu/bitops.h"
#include "exec/cpu_ldst.h"
+#include "translate-all.h"
#undef EAX
#undef ECX
#undef ESI
#undef EDI
#undef EIP
-#include <signal.h>
#ifdef __linux__
#include <sys/ucontext.h>
#endif
//#define DEBUG_SIGNAL
-static void exception_action(CPUState *cpu)
-{
-#if defined(TARGET_I386)
- X86CPU *x86_cpu = X86_CPU(cpu);
- CPUX86State *env1 = &x86_cpu->env;
-
- raise_exception_err(env1, cpu->exception_index, env1->error_code);
-#else
- cpu_loop_exit(cpu);
-#endif
-}
-
/* exit the current TB from a signal handler. The host registers are
restored in a state compatible with the CPU emulator
*/
-void cpu_resume_from_signal(CPUState *cpu, void *puc)
+static void cpu_exit_tb_from_sighandler(CPUState *cpu, sigset_t *old_set)
{
-#ifdef __linux__
- struct ucontext *uc = puc;
-#elif defined(__OpenBSD__)
- struct sigcontext *uc = puc;
-#endif
-
- if (puc) {
- /* XXX: use siglongjmp ? */
-#ifdef __linux__
-#ifdef __ia64
- sigprocmask(SIG_SETMASK, (sigset_t *)&uc->uc_sigmask, NULL);
-#else
- sigprocmask(SIG_SETMASK, &uc->uc_sigmask, NULL);
-#endif
-#elif defined(__OpenBSD__)
- sigprocmask(SIG_SETMASK, &uc->sc_mask, NULL);
-#endif
- }
- cpu->exception_index = -1;
- siglongjmp(cpu->jmp_env, 1);
+ /* XXX: use siglongjmp ? */
+ sigprocmask(SIG_SETMASK, old_set, NULL);
+ cpu_loop_exit_noexc(cpu);
}
/* 'pc' is the host PC at which the exception was raised. 'address' is
write caused the exception and otherwise 0'. 'old_set' is the
signal set which should be restored */
static inline int handle_cpu_signal(uintptr_t pc, unsigned long address,
- int is_write, sigset_t *old_set,
- void *puc)
+ int is_write, sigset_t *old_set)
{
CPUState *cpu;
CPUClass *cc;
int ret;
#if defined(DEBUG_SIGNAL)
- qemu_printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
- pc, address, is_write, *(unsigned long *)old_set);
+ printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
+ pc, address, is_write, *(unsigned long *)old_set);
#endif
/* XXX: locking issue */
- if (is_write && h2g_valid(address)
- && page_unprotect(h2g(address), pc, puc)) {
- return 1;
+ if (is_write && h2g_valid(address)) {
+ switch (page_unprotect(h2g(address), pc)) {
+ case 0:
+ /* Fault not caused by a page marked unwritable to protect
+ * cached translations, must be the guest binary's problem
+ */
+ break;
+ case 1:
+ /* Fault caused by protection of cached translation; TBs
+ * invalidated, so resume execution
+ */
+ return 1;
+ case 2:
+ /* Fault caused by protection of cached translation, and the
+ * currently executing TB was modified and must be exited
+ * immediately.
+ */
+ cpu_exit_tb_from_sighandler(current_cpu, old_set);
+ g_assert_not_reached();
+ default:
+ g_assert_not_reached();
+ }
}
/* Convert forcefully to guest address space, invalid addresses
/* now we have a real cpu fault */
cpu_restore_state(cpu, pc);
- /* we restore the process signal mask as the sigreturn should
- do it (XXX: use sigsetjmp) */
sigprocmask(SIG_SETMASK, old_set, NULL);
- exception_action(cpu);
+ cpu_loop_exit(cpu);
/* never comes here */
return 1;
return handle_cpu_signal(pc, (unsigned long)info->si_addr,
trapno == 0xe ?
(ERROR_sig(uc) >> 1) & 1 : 0,
- &MASK_sig(uc), puc);
+ &MASK_sig(uc));
}
#elif defined(__x86_64__)
return handle_cpu_signal(pc, (unsigned long)info->si_addr,
TRAP_sig(uc) == 0xe ?
(ERROR_sig(uc) >> 1) & 1 : 0,
- &MASK_sig(uc), puc);
+ &MASK_sig(uc));
}
#elif defined(_ARCH_PPC)
}
#endif
return handle_cpu_signal(pc, (unsigned long)info->si_addr,
- is_write, &uc->uc_sigmask, puc);
+ is_write, &uc->uc_sigmask);
}
#elif defined(__alpha__)
}
return handle_cpu_signal(pc, (unsigned long)info->si_addr,
- is_write, &uc->uc_sigmask, puc);
+ is_write, &uc->uc_sigmask);
}
#elif defined(__sparc__)
struct sigcontext *uc = puc;
unsigned long pc = uc->sc_pc;
void *sigmask = (void *)(long)uc->sc_mask;
+#elif defined(__NetBSD__)
+ ucontext_t *uc = puc;
+ unsigned long pc = _UC_MACHINE_PC(uc);
+ void *sigmask = (void *)&uc->uc_sigmask;
#endif
#endif
}
}
return handle_cpu_signal(pc, (unsigned long)info->si_addr,
- is_write, sigmask, NULL);
+ is_write, sigmask);
}
#elif defined(__arm__)
+#if defined(__NetBSD__)
+#include <ucontext.h>
+#endif
+
int cpu_signal_handler(int host_signum, void *pinfo,
void *puc)
{
siginfo_t *info = pinfo;
+#if defined(__NetBSD__)
+ ucontext_t *uc = puc;
+#else
struct ucontext *uc = puc;
+#endif
unsigned long pc;
int is_write;
-#if defined(__GLIBC__) && (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ <= 3))
+#if defined(__NetBSD__)
+ pc = uc->uc_mcontext.__gregs[_REG_R15];
+#elif defined(__GLIBC__) && (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ <= 3))
pc = uc->uc_mcontext.gregs[R15];
#else
pc = uc->uc_mcontext.arm_pc;
is_write = extract32(uc->uc_mcontext.error_code, 11, 1);
return handle_cpu_signal(pc, (unsigned long)info->si_addr,
is_write,
- &uc->uc_sigmask, puc);
+ &uc->uc_sigmask);
}
#elif defined(__aarch64__)
|| (insn & 0x3a400000) == 0x28000000); /* C3.3.7,14-16 */
return handle_cpu_signal(pc, (uintptr_t)info->si_addr,
- is_write, &uc->uc_sigmask, puc);
+ is_write, &uc->uc_sigmask);
}
#elif defined(__mc68000)
is_write = 0;
return handle_cpu_signal(pc, (unsigned long)info->si_addr,
is_write,
- &uc->uc_sigmask, puc);
+ &uc->uc_sigmask);
}
#elif defined(__ia64)
}
return handle_cpu_signal(ip, (unsigned long)info->si_addr,
is_write,
- (sigset_t *)&uc->uc_sigmask, puc);
+ (sigset_t *)&uc->uc_sigmask);
}
#elif defined(__s390__)
break;
}
return handle_cpu_signal(pc, (unsigned long)info->si_addr,
- is_write, &uc->uc_sigmask, puc);
+ is_write, &uc->uc_sigmask);
}
#elif defined(__mips__)
/* XXX: compute is_write */
is_write = 0;
return handle_cpu_signal(pc, (unsigned long)info->si_addr,
- is_write, &uc->uc_sigmask, puc);
+ is_write, &uc->uc_sigmask);
}
#elif defined(__hppa__)
}
return handle_cpu_signal(pc, (unsigned long)info->si_addr,
- is_write, &uc->uc_sigmask, puc);
+ is_write, &uc->uc_sigmask);
}
#else
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