diff options
author | Arjan van de Ven <arjan@infradead.org> | 2007-06-21 01:23:21 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-06-21 19:02:50 -0400 |
commit | 0864a4e201b1ea442f4c8b887418a29f67e24d30 (patch) | |
tree | cee5372bb22502e52029543dfb72c571a1e89faa /arch/x86_64/mm | |
parent | 79d9a72f87d0a6f910be262a9dd4c36e96972a92 (diff) |
Allow DEBUG_RODATA and KPROBES to co-exist
Do not mark the kernel text read only if KPROBES is in the kernel;
kprobes needs to hot-patch the kernel text to insert it's
instrumentation.
In this case, only mark the .rodata segment as read only.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Tested-by: S. P. Prasanna <prasanna@in.ibm.com>
Cc: Andi Kleen <ak@suse.de>
Cc: William Cohen <wcohen@redhat.com>
Cc: Ian McDonald <ian.mcdonald@jandi.co.nz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86_64/mm')
-rw-r--r-- | arch/x86_64/mm/init.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c index efb6e845114e..9a0e98accf04 100644 --- a/arch/x86_64/mm/init.c +++ b/arch/x86_64/mm/init.c | |||
@@ -605,6 +605,11 @@ void mark_rodata_ro(void) | |||
605 | if (num_possible_cpus() > 1) | 605 | if (num_possible_cpus() > 1) |
606 | start = (unsigned long)_etext; | 606 | start = (unsigned long)_etext; |
607 | #endif | 607 | #endif |
608 | |||
609 | #ifdef CONFIG_KPROBES | ||
610 | start = (unsigned long)__start_rodata; | ||
611 | #endif | ||
612 | |||
608 | end = (unsigned long)__end_rodata; | 613 | end = (unsigned long)__end_rodata; |
609 | start = (start + PAGE_SIZE - 1) & PAGE_MASK; | 614 | start = (start + PAGE_SIZE - 1) & PAGE_MASK; |
610 | end &= PAGE_MASK; | 615 | end &= PAGE_MASK; |