diff options
| author | Alexander Nyberg <alexn@telia.com> | 2005-04-21 10:59:51 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-21 10:59:51 -0400 |
| commit | 3a6fd752a50af92765853879f4a11cc0cfcd0320 (patch) | |
| tree | dc79d50fb8d8c74259945b8a044f93982a9289bd /arch/x86_64/lib/getuser.S | |
| parent | 6d9c5d94d39a09d9b112613f0bfdb9af0e6dc253 (diff) | |
[PATCH] x86_64: Bug in new out of line put_user()
The new out of line put_user() assembly on x86_64 changes %rcx without
telling GCC about it causing things like:
http://bugme.osdl.org/show_bug.cgi?id=4515
See to it that %rcx is not changed (made it consistent with get_user()).
Signed-off-by: Alexander Nyberg <alexn@telia.com>
Signed-off-by: ak@suse.de
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64/lib/getuser.S')
| -rw-r--r-- | arch/x86_64/lib/getuser.S | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86_64/lib/getuser.S b/arch/x86_64/lib/getuser.S index f94ea8a44051..f80bafee8669 100644 --- a/arch/x86_64/lib/getuser.S +++ b/arch/x86_64/lib/getuser.S | |||
| @@ -78,9 +78,9 @@ __get_user_4: | |||
| 78 | __get_user_8: | 78 | __get_user_8: |
| 79 | GET_THREAD_INFO(%r8) | 79 | GET_THREAD_INFO(%r8) |
| 80 | addq $7,%rcx | 80 | addq $7,%rcx |
| 81 | jc bad_get_user | 81 | jc 40f |
| 82 | cmpq threadinfo_addr_limit(%r8),%rcx | 82 | cmpq threadinfo_addr_limit(%r8),%rcx |
| 83 | jae bad_get_user | 83 | jae 40f |
| 84 | subq $7,%rcx | 84 | subq $7,%rcx |
| 85 | 4: movq (%rcx),%rdx | 85 | 4: movq (%rcx),%rdx |
| 86 | xorl %eax,%eax | 86 | xorl %eax,%eax |