Merge master.kernel.org:/pub/scm/linux/kernel/git/paulus/powerpc

[linux-2.6-omap-h63xx.git] / include / asm-x86_64 / bug.h

diff --git a/include/asm-x86_64/bug.h b/include/asm-x86_64/bug.h
index 3d2a666a5dd536f95239f2637c1ee87c4bb48376..80ac1fe966ac13ec3be908b2ec94bfaccefb40cc 100644 (file)
--- a/include/asm-x86_64/bug.h
+++ b/include/asm-x86_64/bug.h
@@ -8,18 +8,23 @@
  * this frame.
  */
 struct bug_frame {
-       unsigned char ud2[2];
-       /* should use 32bit offset instead, but the assembler doesn't 
-          like it */
-       char *filename;
+       unsigned char ud2[2];
+       unsigned char push;
+       signed int filename;
+       unsigned char ret;
        unsigned short line;
 } __attribute__((packed));
 
 #ifdef CONFIG_BUG
 #define HAVE_ARCH_BUG
-#define BUG() \
-       asm volatile("ud2 ; .quad %c1 ; .short %c0" :: \
-                    "i"(__LINE__), "i" (__stringify(__FILE__)))
+/* We turn the bug frame into valid instructions to not confuse
+   the disassembler. Thanks to Jan Beulich & Suresh Siddha
+   for nice instruction selection.
+   The magic numbers generate mov $64bitimm,%eax ; ret $offset. */
+#define BUG()                                                          \
+       asm volatile(                                                   \
+       "ud2 ; pushq $%c1 ; ret $%c0" ::                                \
+                    "i"(__LINE__), "i" (__FILE__))
 void out_of_line_bug(void);
 #else
 static inline void out_of_line_bug(void) { }