diff options
author | Andi Kleen <ak@suse.de> | 2006-01-15 19:56:39 -0500 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-16 14:27:58 -0500 |
commit | 5f8efbb96f4b2679dcbd2c115380a47bd2089dcd (patch) | |
tree | 09b8c0684ee8e943d6199e2e4ebc21e5ce0062c9 /arch/x86_64/kernel/entry.S | |
parent | aa41eb9915de74fc6935792973bac4bd777ce218 (diff) |
[PATCH] x86_64: Allow nesting of int3 by default for kprobes
This unbreaks recursive kprobes which didn't work anymore
due to an earlier patch which converted the debug entry point
to use an IST.
This also allows nesting of the debug entry point too.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64/kernel/entry.S')
-rw-r--r-- | arch/x86_64/kernel/entry.S | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/arch/x86_64/kernel/entry.S b/arch/x86_64/kernel/entry.S index 632fc0f59fcc..dbdba56e8faa 100644 --- a/arch/x86_64/kernel/entry.S +++ b/arch/x86_64/kernel/entry.S | |||
@@ -41,6 +41,7 @@ | |||
41 | #include <asm/unistd.h> | 41 | #include <asm/unistd.h> |
42 | #include <asm/thread_info.h> | 42 | #include <asm/thread_info.h> |
43 | #include <asm/hw_irq.h> | 43 | #include <asm/hw_irq.h> |
44 | #include <asm/page.h> | ||
44 | 45 | ||
45 | .code64 | 46 | .code64 |
46 | 47 | ||
@@ -674,9 +675,6 @@ ENTRY(spurious_interrupt) | |||
674 | 675 | ||
675 | /* error code is on the stack already */ | 676 | /* error code is on the stack already */ |
676 | /* handle NMI like exceptions that can happen everywhere */ | 677 | /* handle NMI like exceptions that can happen everywhere */ |
677 | #ifndef DEBUG_IST | ||
678 | # define DEBUG_IST 0 | ||
679 | #endif | ||
680 | .macro paranoidentry sym, ist=0 | 678 | .macro paranoidentry sym, ist=0 |
681 | SAVE_ALL | 679 | SAVE_ALL |
682 | cld | 680 | cld |
@@ -695,11 +693,11 @@ ENTRY(spurious_interrupt) | |||
695 | movq ORIG_RAX(%rsp),%rsi | 693 | movq ORIG_RAX(%rsp),%rsi |
696 | movq $-1,ORIG_RAX(%rsp) | 694 | movq $-1,ORIG_RAX(%rsp) |
697 | .if \ist | 695 | .if \ist |
698 | subq $EXCEPTION_STACK_SIZE, per_cpu__init_tss + TSS_ist + (\ist - 1) * 8(%rbp) | 696 | subq $EXCEPTION_STKSZ, per_cpu__init_tss + TSS_ist + (\ist - 1) * 8(%rbp) |
699 | .endif | 697 | .endif |
700 | call \sym | 698 | call \sym |
701 | .if \ist | 699 | .if \ist |
702 | addq $EXCEPTION_STACK_SIZE, per_cpu__init_tss + TSS_ist + (\ist - 1) * 8(%rbp) | 700 | addq $EXCEPTION_STKSZ, per_cpu__init_tss + TSS_ist + (\ist - 1) * 8(%rbp) |
703 | .endif | 701 | .endif |
704 | cli | 702 | cli |
705 | .endm | 703 | .endm |
@@ -918,7 +916,7 @@ KPROBE_ENTRY(debug) | |||
918 | INTR_FRAME | 916 | INTR_FRAME |
919 | pushq $0 | 917 | pushq $0 |
920 | CFI_ADJUST_CFA_OFFSET 8 | 918 | CFI_ADJUST_CFA_OFFSET 8 |
921 | paranoidentry do_debug, DEBUG_IST | 919 | paranoidentry do_debug, DEBUG_STACK |
922 | jmp paranoid_exit | 920 | jmp paranoid_exit |
923 | CFI_ENDPROC | 921 | CFI_ENDPROC |
924 | .previous .text | 922 | .previous .text |
@@ -976,7 +974,7 @@ KPROBE_ENTRY(int3) | |||
976 | INTR_FRAME | 974 | INTR_FRAME |
977 | pushq $0 | 975 | pushq $0 |
978 | CFI_ADJUST_CFA_OFFSET 8 | 976 | CFI_ADJUST_CFA_OFFSET 8 |
979 | paranoidentry do_int3, DEBUG_IST | 977 | paranoidentry do_int3, DEBUG_STACK |
980 | jmp paranoid_exit | 978 | jmp paranoid_exit |
981 | CFI_ENDPROC | 979 | CFI_ENDPROC |
982 | .previous .text | 980 | .previous .text |