2006-01-12 Roland McGrath <roland@redhat.com>

[strace] / syscall.c

diff --git a/syscall.c b/syscall.c
index f5ce8d1bd59f88dacf5d3b8c88339c072036a93d..22893a790fd5f9723fc1f7e9a2333bdbcb7f089f 100644 (file)
--- a/syscall.c
+++ b/syscall.c
@@ -183,6 +183,19 @@ int nerrnos;
 
 int current_personality;
 
+#ifndef PERSONALITY0_WORDSIZE
+# define PERSONALITY0_WORDSIZE sizeof(long)
+#endif
+const int personality_wordsize[SUPPORTED_PERSONALITIES] = {
+       PERSONALITY0_WORDSIZE,
+#if SUPPORTED_PERSONALITIES > 1
+       PERSONALITY1_WORDSIZE,
+#endif
+#if SUPPORTED_PERSONALITIES > 2
+       PERSONALITY2_WORDSIZE,
+#endif
+};;
+
 int
 set_personality(personality)
 int personality;
@@ -628,8 +641,9 @@ int subcall;
 int nsubcalls;
 enum subcall_style style;
 {
-       long addr, mask, arg;
+       unsigned long addr, mask;
        int i;
+       int size = personality_wordsize[current_personality];
 
        switch (style) {
        case shift_style:
@@ -649,10 +663,21 @@ enum subcall_style style;
                tcp->scno = subcall + tcp->u_arg[0];
                addr = tcp->u_arg[1];
                for (i = 0; i < sysent[tcp->scno].nargs; i++) {
-                       if (umove(tcp, addr, &arg) < 0)
-                               arg = 0;
-                       tcp->u_arg[i] = arg;
-                       addr += sizeof(arg);
+                       if (size == sizeof(int)) {
+                               unsigned int arg;
+                               if (umove(tcp, addr, &arg) < 0)
+                                       arg = 0;
+                               tcp->u_arg[i] = arg;
+                       }
+                       else if (size == sizeof(long)) {
+                               unsigned long arg;
+                               if (umove(tcp, addr, &arg) < 0)
+                                       arg = 0;
+                               tcp->u_arg[i] = arg;
+                       }
+                       else
+                               abort();
+                       addr += size;
                }
                tcp->u_nargs = sysent[tcp->scno].nargs;
                break;