[Qemu-devel] [7131] Translate signal values in exit status.

[Paul Brook <paul@nowt.org>]

Revision: 7131
          http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=7131
Author:   pbrook
Date:     2009-04-16 15:17:02 +0000 (Thu, 16 Apr 2009)
Log Message:
-----------
Translate signal values in exit status.

Signed-off-by: Paul Brook <paul@codesourcery.com>

Modified Paths:
--------------
    trunk/linux-user/qemu.h
    trunk/linux-user/signal.c
    trunk/linux-user/syscall.c

Modified: trunk/linux-user/qemu.h
===================================================================
--- trunk/linux-user/qemu.h	2009-04-16 14:17:14 UTC (rev 7130)
+++ trunk/linux-user/qemu.h	2009-04-16 15:17:02 UTC (rev 7131)
@@ -201,6 +201,7 @@
 void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);
 void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo);
 int target_to_host_signal(int sig);
+int host_to_target_signal(int sig);
 long do_sigreturn(CPUState *env);
 long do_rt_sigreturn(CPUState *env);
 abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp);

Modified: trunk/linux-user/signal.c
===================================================================
--- trunk/linux-user/signal.c	2009-04-16 14:17:14 UTC (rev 7130)
+++ trunk/linux-user/signal.c	2009-04-16 15:17:02 UTC (rev 7131)
@@ -102,7 +102,7 @@
             : on_sig_stack(sp) ? SS_ONSTACK : 0);
 }
 
-static inline int host_to_target_signal(int sig)
+int host_to_target_signal(int sig)
 {
     if (sig > 64)
         return sig;

Modified: trunk/linux-user/syscall.c
===================================================================
--- trunk/linux-user/syscall.c	2009-04-16 14:17:14 UTC (rev 7130)
+++ trunk/linux-user/syscall.c	2009-04-16 15:17:02 UTC (rev 7131)
@@ -3643,6 +3643,20 @@
 }
 #endif
 
+/* Map host to target signal numbers for the wait family of syscalls.
+   Assume all other status bits are the same.  */
+static int host_to_target_waitstatus(int status)
+{
+    if (WIFSIGNALED(status)) {
+        return host_to_target_signal(WTERMSIG(status)) | (status & ~0x7f);
+    }
+    if (WIFSTOPPED(status)) {
+        return (host_to_target_signal(WSTOPSIG(status)) << 8)
+               | (status & 0xff);
+    }
+    return status;
+}
+
 int get_osversion(void)
 {
     static int osversion;
@@ -3786,7 +3800,7 @@
             int status;
             ret = get_errno(waitpid(arg1, &status, arg3));
             if (!is_error(ret) && arg2
-                && put_user_s32(status, arg2))
+                && put_user_s32(host_to_target_waitstatus(status), arg2))
                 goto efault;
         }
         break;
@@ -5136,6 +5150,7 @@
             ret = get_errno(wait4(arg1, &status, arg3, rusage_ptr));
             if (!is_error(ret)) {
                 if (status_ptr) {
+                    status = host_to_target_waitstatus(status);
                     if (put_user_s32(status, status_ptr))
                         goto efault;
                 }