diff options
Diffstat (limited to 'arch/x86/kernel/ftrace.c')
-rw-r--r-- | arch/x86/kernel/ftrace.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c index 1b43086b097a..231bdd3c5b1c 100644 --- a/arch/x86/kernel/ftrace.c +++ b/arch/x86/kernel/ftrace.c | |||
@@ -488,20 +488,21 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr) | |||
488 | * ignore such a protection. | 488 | * ignore such a protection. |
489 | */ | 489 | */ |
490 | asm volatile( | 490 | asm volatile( |
491 | "1: " _ASM_MOV " (%[parent_old]), %[old]\n" | 491 | "1: " _ASM_MOV " (%[parent]), %[old]\n" |
492 | "2: " _ASM_MOV " %[return_hooker], (%[parent_replaced])\n" | 492 | "2: " _ASM_MOV " %[return_hooker], (%[parent])\n" |
493 | " movl $0, %[faulted]\n" | 493 | " movl $0, %[faulted]\n" |
494 | "3:\n" | ||
494 | 495 | ||
495 | ".section .fixup, \"ax\"\n" | 496 | ".section .fixup, \"ax\"\n" |
496 | "3: movl $1, %[faulted]\n" | 497 | "4: movl $1, %[faulted]\n" |
498 | " jmp 3b\n" | ||
497 | ".previous\n" | 499 | ".previous\n" |
498 | 500 | ||
499 | _ASM_EXTABLE(1b, 3b) | 501 | _ASM_EXTABLE(1b, 4b) |
500 | _ASM_EXTABLE(2b, 3b) | 502 | _ASM_EXTABLE(2b, 4b) |
501 | 503 | ||
502 | : [parent_replaced] "=r" (parent), [old] "=r" (old), | 504 | : [old] "=r" (old), [faulted] "=r" (faulted) |
503 | [faulted] "=r" (faulted) | 505 | : [parent] "r" (parent), [return_hooker] "r" (return_hooker) |
504 | : [parent_old] "0" (parent), [return_hooker] "r" (return_hooker) | ||
505 | : "memory" | 506 | : "memory" |
506 | ); | 507 | ); |
507 | 508 | ||