migration: not necessary to check ops again

[mirror_qemu.git] / linux-user / signal.c

diff --git a/linux-user/signal.c b/linux-user/signal.c
index a3022c2f04e83ddf370d30905e51b6fa62c1f23d..44b2d3b35a0d8855122d9284c5dba47ce6ba7590 100644 (file)
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -23,7 +23,6 @@
 
 #include "qemu.h"
 #include "qemu-common.h"
-#include "target_signal.h"
 #include "trace.h"
 #include "signal-common.h"
 
@@ -237,7 +236,7 @@ int do_sigprocmask(int how, const sigset_t *set, sigset_t *oldset)
     return 0;
 }
 
-#if !defined(TARGET_OPENRISC) && !defined(TARGET_NIOS2)
+#if !defined(TARGET_NIOS2)
 /* Just set the guest's signal mask to the specified value; the
  * caller is assumed to have called block_signals() already.
  */
@@ -249,6 +248,38 @@ void set_sigmask(const sigset_t *set)
 }
 #endif
 
+/* sigaltstack management */
+
+int on_sig_stack(unsigned long sp)
+{
+    return (sp - target_sigaltstack_used.ss_sp
+            < target_sigaltstack_used.ss_size);
+}
+
+int sas_ss_flags(unsigned long sp)
+{
+    return (target_sigaltstack_used.ss_size == 0 ? SS_DISABLE
+            : on_sig_stack(sp) ? SS_ONSTACK : 0);
+}
+
+abi_ulong target_sigsp(abi_ulong sp, struct target_sigaction *ka)
+{
+    /*
+     * This is the X/Open sanctioned signal stack switching.
+     */
+    if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp)) {
+        return target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
+    }
+    return sp;
+}
+
+void target_save_altstack(target_stack_t *uss, CPUArchState *env)
+{
+    __put_user(target_sigaltstack_used.ss_sp, &uss->ss_sp);
+    __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &uss->ss_flags);
+    __put_user(target_sigaltstack_used.ss_size, &uss->ss_size);
+}
+
 /* siginfo conversion */
 
 static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo,
@@ -477,6 +508,11 @@ void signal_init(void)
     act.sa_flags = SA_SIGINFO;
     act.sa_sigaction = host_signal_handler;
     for(i = 1; i <= TARGET_NSIG; i++) {
+#ifdef TARGET_GPROF
+        if (i == SIGPROF) {
+            continue;
+        }
+#endif
         host_sig = target_to_host_signal(i);
         sigaction(host_sig, NULL, &oact);
         if (oact.sa_sigaction == (void *)SIG_IGN) {
@@ -696,7 +732,7 @@ abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp)
         }
 #endif
 
-       ret = -TARGET_EFAULT;
+        ret = -TARGET_EFAULT;
         if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1)) {
             goto out;
         }
@@ -705,25 +741,25 @@ abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp)
         __get_user(ss.ss_flags, &uss->ss_flags);
         unlock_user_struct(uss, uss_addr, 0);
 
-       ret = -TARGET_EPERM;
-       if (on_sig_stack(sp))
+        ret = -TARGET_EPERM;
+        if (on_sig_stack(sp))
             goto out;
 
-       ret = -TARGET_EINVAL;
-       if (ss.ss_flags != TARGET_SS_DISABLE
+        ret = -TARGET_EINVAL;
+        if (ss.ss_flags != TARGET_SS_DISABLE
             && ss.ss_flags != TARGET_SS_ONSTACK
             && ss.ss_flags != 0)
             goto out;
 
-       if (ss.ss_flags == TARGET_SS_DISABLE) {
+        if (ss.ss_flags == TARGET_SS_DISABLE) {
             ss.ss_size = 0;
             ss.ss_sp = 0;
-       } else {
+        } else {
             ret = -TARGET_ENOMEM;
             if (ss.ss_size < minstacksize) {
                 goto out;
             }
-       }
+        }
 
         target_sigaltstack_used.ss_sp = ss.ss_sp;
         target_sigaltstack_used.ss_size = ss.ss_size;