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trace: enable tracing in qemu-io
[qemu.git] / user-exec.c
diff --git a/user-exec.c b/user-exec.c
index bc58056e6ce6c59d478552dab56c880e5c94cffc..50e95a68de724b3eb9440aad997c5008b2206059 100644 (file)
--- a/user-exec.c
+++ b/user-exec.c
@@ -16,11 +16,14 @@
  * 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/>.
  */
  * 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 "cpu.h"
 #include "disas/disas.h"
+#include "exec/exec-all.h"
 #include "tcg.h"
 #include "qemu/bitops.h"
 #include "tcg.h"
 #include "qemu/bitops.h"
+#include "exec/cpu_ldst.h"
+#include "translate-all.h"
 
 #undef EAX
 #undef ECX
 
 #undef EAX
 #undef ECX
@@ -31,50 +34,20 @@
 #undef ESI
 #undef EDI
 #undef EIP
 #undef ESI
 #undef EDI
 #undef EIP
-#include <signal.h>
 #ifdef __linux__
 #include <sys/ucontext.h>
 #endif
 
 //#define DEBUG_SIGNAL
 
 #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
  */
 /* 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
 }
 
 /* 'pc' is the host PC at which the exception was raised. 'address' is
@@ -82,21 +55,39 @@ void cpu_resume_from_signal(CPUState *cpu, void *puc)
    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,
    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)
 {
     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 */
 #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
     }
 
     /* Convert forcefully to guest address space, invalid addresses
@@ -117,10 +108,8 @@ static inline int handle_cpu_signal(uintptr_t pc, unsigned long address,
     /* now we have a real cpu fault */
     cpu_restore_state(cpu, pc);
 
     /* 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);
     sigprocmask(SIG_SETMASK, old_set, NULL);
-    exception_action(cpu);
+    cpu_loop_exit(cpu);
 
     /* never comes here */
     return 1;
 
     /* never comes here */
     return 1;
@@ -186,7 +175,7 @@ int cpu_signal_handler(int host_signum, void *pinfo,
     return handle_cpu_signal(pc, (unsigned long)info->si_addr,
                              trapno == 0xe ?
                              (ERROR_sig(uc) >> 1) & 1 : 0,
     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__)
 }
 
 #elif defined(__x86_64__)
@@ -232,7 +221,7 @@ int cpu_signal_handler(int host_signum, void *pinfo,
     return handle_cpu_signal(pc, (unsigned long)info->si_addr,
                              TRAP_sig(uc) == 0xe ?
                              (ERROR_sig(uc) >> 1) & 1 : 0,
     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)
 }
 
 #elif defined(_ARCH_PPC)
@@ -348,7 +337,7 @@ int cpu_signal_handler(int host_signum, void *pinfo,
     }
 #endif
     return handle_cpu_signal(pc, (unsigned long)info->si_addr,
     }
 #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__)
 }
 
 #elif defined(__alpha__)
@@ -379,7 +368,7 @@ int cpu_signal_handler(int host_signum, void *pinfo,
     }
 
     return handle_cpu_signal(pc, (unsigned long)info->si_addr,
     }
 
     return handle_cpu_signal(pc, (unsigned long)info->si_addr,
-                             is_write, &uc->uc_sigmask, puc);
+                             is_write, &uc->uc_sigmask);
 }
 #elif defined(__sparc__)
 
 }
 #elif defined(__sparc__)
 
@@ -403,6 +392,10 @@ int cpu_signal_handler(int host_signum, void *pinfo,
     struct sigcontext *uc = puc;
     unsigned long pc = uc->sc_pc;
     void *sigmask = (void *)(long)uc->sc_mask;
     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
 
 #endif
 #endif
 
@@ -435,20 +428,30 @@ int cpu_signal_handler(int host_signum, void *pinfo,
         }
     }
     return handle_cpu_signal(pc, (unsigned long)info->si_addr,
         }
     }
     return handle_cpu_signal(pc, (unsigned long)info->si_addr,
-                             is_write, sigmask, NULL);
+                             is_write, sigmask);
 }
 
 #elif defined(__arm__)
 
 }
 
 #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;
 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;
     struct ucontext *uc = puc;
+#endif
     unsigned long pc;
     int is_write;
 
     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;
     pc = uc->uc_mcontext.gregs[R15];
 #else
     pc = uc->uc_mcontext.arm_pc;
@@ -460,22 +463,35 @@ int cpu_signal_handler(int host_signum, void *pinfo,
     is_write = extract32(uc->uc_mcontext.error_code, 11, 1);
     return handle_cpu_signal(pc, (unsigned long)info->si_addr,
                              is_write,
     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__)
 
 }
 
 #elif defined(__aarch64__)
 
-int cpu_signal_handler(int host_signum, void *pinfo,
-                       void *puc)
+int cpu_signal_handler(int host_signum, void *pinfo, void *puc)
 {
     siginfo_t *info = pinfo;
     struct ucontext *uc = puc;
 {
     siginfo_t *info = pinfo;
     struct ucontext *uc = puc;
-    uint64_t pc;
-    int is_write = 0; /* XXX how to determine? */
+    uintptr_t pc = uc->uc_mcontext.pc;
+    uint32_t insn = *(uint32_t *)pc;
+    bool is_write;
 
 
-    pc = uc->uc_mcontext.pc;
-    return handle_cpu_signal(pc, (uint64_t)info->si_addr,
-                             is_write, &uc->uc_sigmask, puc);
+    /* XXX: need kernel patch to get write flag faster.  */
+    is_write = (   (insn & 0xbfff0000) == 0x0c000000   /* C3.3.1 */
+                || (insn & 0xbfe00000) == 0x0c800000   /* C3.3.2 */
+                || (insn & 0xbfdf0000) == 0x0d000000   /* C3.3.3 */
+                || (insn & 0xbfc00000) == 0x0d800000   /* C3.3.4 */
+                || (insn & 0x3f400000) == 0x08000000   /* C3.3.6 */
+                || (insn & 0x3bc00000) == 0x39000000   /* C3.3.13 */
+                || (insn & 0x3fc00000) == 0x3d800000   /* ... 128bit */
+                /* Ingore bits 10, 11 & 21, controlling indexing.  */
+                || (insn & 0x3bc00000) == 0x38000000   /* C3.3.8-12 */
+                || (insn & 0x3fe00000) == 0x3c800000   /* ... 128bit */
+                /* Ignore bits 23 & 24, controlling indexing.  */
+                || (insn & 0x3a400000) == 0x28000000); /* C3.3.7,14-16 */
+
+    return handle_cpu_signal(pc, (uintptr_t)info->si_addr,
+                             is_write, &uc->uc_sigmask);
 }
 
 #elif defined(__mc68000)
 }
 
 #elif defined(__mc68000)
@@ -493,7 +509,7 @@ int cpu_signal_handler(int host_signum, void *pinfo,
     is_write = 0;
     return handle_cpu_signal(pc, (unsigned long)info->si_addr,
                              is_write,
     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)
 }
 
 #elif defined(__ia64)
@@ -528,7 +544,7 @@ int cpu_signal_handler(int host_signum, void *pinfo, void *puc)
     }
     return handle_cpu_signal(ip, (unsigned long)info->si_addr,
                              is_write,
     }
     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__)
 }
 
 #elif defined(__s390__)
@@ -581,7 +597,7 @@ int cpu_signal_handler(int host_signum, void *pinfo,
         break;
     }
     return handle_cpu_signal(pc, (unsigned long)info->si_addr,
         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__)
 }
 
 #elif defined(__mips__)
@@ -597,7 +613,7 @@ int cpu_signal_handler(int host_signum, void *pinfo,
     /* XXX: compute is_write */
     is_write = 0;
     return handle_cpu_signal(pc, (unsigned long)info->si_addr,
     /* 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__)
 }
 
 #elif defined(__hppa__)
@@ -639,7 +655,7 @@ int cpu_signal_handler(int host_signum, void *pinfo,
     }
 
     return handle_cpu_signal(pc, (unsigned long)info->si_addr,
     }
 
     return handle_cpu_signal(pc, (unsigned long)info->si_addr,
-                             is_write, &uc->uc_sigmask, puc);
+                             is_write, &uc->uc_sigmask);
 }
 
 #else
 }
 
 #else
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