Fix PR11160 by handling ppc syscall.sigaction32 correctly.

* tapset/aux_syscalls.stp (_struct_old_sigaction32_u): New function.
* tapset/syscalls2.stp (syscall.sigaction32): Uses new
  _struct_old_sigaction32() function to provide a human readable version
  of the sigaction argument.
* testsuite/systemtap.syscall/test.tcl (run_one_test): Use additional C
  flags when pre-processing test files to better determine which tests are
  valid on which platforms.

1 files changed, 44 insertions, 0 deletions

diff --git a/tapset/aux_syscalls.stp b/tapset/aux_syscalls.stp
index 6e45e8e1..4577d64e 100644
--- a/tapset/aux_syscalls.stp
+++ b/tapset/aux_syscalls.stp
@@ -1851,6 +1851,8 @@ function _struct_sigaction32_u:string(uaddr:long)
 #include <linux/compat.h>
   
   // There seems to be no public cross arch header that defines this.
+  // For x86, you can find it in asm/ia32.h.  For s390x, it is defined
+  // in a private header.
   struct sigaction32 {
     compat_uptr_t  sa_handler;
     unsigned int sa_flags;
@@ -1869,9 +1871,11 @@ function _struct_sigaction32_u:string(uaddr:long)
 			     sizeof(struct sigaction32)) == 0)
 	{
 	  struct sigaction act;
+
 	  act.sa_handler = (void *)compat_ptr(act32.sa_handler);
 	  act.sa_flags = (unsigned long)act32.sa_flags;
 	  act.sa_restorer = (void *)compat_ptr(act32.sa_restorer);
+
 	  /* swap words around to get right endian order. */
 	  switch (_NSIG_WORDS)
 	    {
@@ -1884,6 +1888,46 @@ function _struct_sigaction32_u:string(uaddr:long)
 	    case 1: act.sa_mask.sig[0] = act32.sa_mask.sig[0]
 		| (((long)act32.sa_mask.sig[1]) << 32);
 	    }
+
+	  _stp_sigaction_str(&act, THIS->__retvalue, MAXSTRINGLEN);	  
+	}
+      else
+	strlcpy (THIS->__retvalue, "UNKNOWN", MAXSTRINGLEN);
+    }
+#endif
+%}
+
+function _struct_old_sigaction32_u:string(uaddr:long)
+%{ /* pure */
+#ifdef CONFIG_COMPAT
+#include <linux/compat.h>
+
+  // There seems to be no public cross arch header that defines this.
+  // For x86, you can find it in asm/ia32.h.  For s390x, it is defined
+  // in a private header.
+  struct old_sigaction32 {
+    compat_uptr_t  sa_handler;
+    compat_old_sigset_t sa_mask;    /* A 32 bit mask */
+    unsigned int sa_flags;
+    unsigned int sa_restorer;       /* Another 32 bit pointer */
+  };
+
+  struct old_sigaction32 act32;
+  char *ptr = (char *)(unsigned long)THIS->uaddr;
+  
+  if (ptr == NULL)
+    strlcpy (THIS->__retvalue, "NULL", MAXSTRINGLEN);
+  else
+    {
+      if(_stp_copy_from_user((char*)&act32, ptr,
+			     sizeof(struct old_sigaction32)) == 0)
+	{
+	  struct sigaction act;
+
+	  act.sa_handler = (void *)compat_ptr(act32.sa_handler);
+	  act.sa_restorer = (void *)compat_ptr(act32.sa_restorer);
+	  act.sa_flags = (unsigned long)act32.sa_flags;
+	  siginitset(&act.sa_mask, act32.sa_mask);
 	  _stp_sigaction_str(&act, THIS->__retvalue, MAXSTRINGLEN);	  
 	}
       else