Fix a couple of bugs in the sigalstack wrapper (Nb: found when I was

(apparently) self-hosting :)

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@1835

diff --git a/coregrind/vg_syscalls.c b/coregrind/vg_syscalls.c
index cdb72fcfde8dfec353e7806ff2f29d222b00883d..9f1d162b813af52053b44fbbf0068cf87816d3d9 100644 (file)
--- a/coregrind/vg_syscalls.c
+++ b/coregrind/vg_syscalls.c
@@ -3420,8 +3420,8 @@ void VG_(perform_assumed_nonblocking_syscall) ( ThreadId tid )
                               arg1, sizeof(vki_kstack_t) );
          }
          if (arg2 != (UInt)NULL) {
-            SYSCALL_TRACK( pre_mem_write, tid, "sigaltstack(ss)", 
-                              arg1, sizeof(vki_kstack_t) );
+            SYSCALL_TRACK( pre_mem_write, tid, "sigaltstack(oss)", 
+                              arg2, sizeof(vki_kstack_t) );
          }
 #        if SIGNAL_SIMULATION
          VG_(do__NR_sigaltstack) (tid);