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| author | Jan Beulich <jbeulich@novell.com> | 2005-09-12 18:49:25 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-12 10:50:58 -0700 |
| commit | 049cdefe19f95b67b06b70915cd8e4ae7173337a (patch) | |
| tree | 42a0846ec18e3c4f705f8f167890675c5978a814 /include | |
| parent | c47a3167d0454c0af5fb0a0322b01a0e3487798e (diff) | |
| download | linux-3.10-049cdefe19f95b67b06b70915cd8e4ae7173337a.tar.gz linux-3.10-049cdefe19f95b67b06b70915cd8e4ae7173337a.tar.bz2 linux-3.10-049cdefe19f95b67b06b70915cd8e4ae7173337a.zip | |
[PATCH] x86-64: reduce x86-64 bug frame by 4 bytes
As mentioned before, the size of the bug frame can be further reduced while
continuing to use instructions to encode the information.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-x86_64/bug.h | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/include/asm-x86_64/bug.h b/include/asm-x86_64/bug.h index eed78566728..80ac1fe966a 100644 --- a/include/asm-x86_64/bug.h +++ b/include/asm-x86_64/bug.h @@ -9,10 +9,8 @@ */ struct bug_frame { unsigned char ud2[2]; - unsigned char mov; - /* should use 32bit offset instead, but the assembler doesn't - like it */ - char *filename; + unsigned char push; + signed int filename; unsigned char ret; unsigned short line; } __attribute__((packed)); @@ -25,8 +23,8 @@ struct bug_frame { The magic numbers generate mov $64bitimm,%eax ; ret $offset. */ #define BUG() \ asm volatile( \ - "ud2 ; .byte 0xa3 ; .quad %c1 ; .byte 0xc2 ; .short %c0" :: \ - "i"(__LINE__), "i" (__stringify(__FILE__))) + "ud2 ; pushq $%c1 ; ret $%c0" :: \ + "i"(__LINE__), "i" (__FILE__)) void out_of_line_bug(void); #else static inline void out_of_line_bug(void) { } |