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| author | Oleg Nesterov <oleg@redhat.com> | 2015-07-21 15:40:26 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-07-31 10:38:06 +0200 |
| commit | 86dcb702e74b8ab7d3b2d36984ef00671cea73b9 (patch) | |
| tree | 11ca9d381085a5936368c78203b0f3f505edfe30 /include/linux/uprobes.h | |
| parent | a5b7e1a89b820f2b9b23634ca4c59b555e8d9a0d (diff) | |
| download | lwn-86dcb702e74b8ab7d3b2d36984ef00671cea73b9.tar.gz lwn-86dcb702e74b8ab7d3b2d36984ef00671cea73b9.zip | |
uprobes: Add the "enum rp_check ctx" arg to arch_uretprobe_is_alive()
arch/x86 doesn't care (so far), but as Pratyush Anand pointed
out other architectures might want why arch_uretprobe_is_alive()
was called and use different checks depending on the context.
Add the new argument to distinguish 2 callers.
Tested-by: Pratyush Anand <panand@redhat.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Acked-by: Anton Arapov <arapov@gmail.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20150721134026.GA4779@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/uprobes.h')
| -rw-r--r-- | include/linux/uprobes.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h index 7ab6d2c8be49..c0a540239ab6 100644 --- a/include/linux/uprobes.h +++ b/include/linux/uprobes.h @@ -102,6 +102,11 @@ struct return_instance { struct return_instance *next; /* keep as stack */ }; +enum rp_check { + RP_CHECK_CALL, + RP_CHECK_RET, +}; + struct xol_area; struct uprobes_state { @@ -138,7 +143,7 @@ extern bool arch_uprobe_xol_was_trapped(struct task_struct *tsk); extern int arch_uprobe_exception_notify(struct notifier_block *self, unsigned long val, void *data); extern void arch_uprobe_abort_xol(struct arch_uprobe *aup, struct pt_regs *regs); extern unsigned long arch_uretprobe_hijack_return_addr(unsigned long trampoline_vaddr, struct pt_regs *regs); -extern bool arch_uretprobe_is_alive(struct return_instance *ret, struct pt_regs *regs); +extern bool arch_uretprobe_is_alive(struct return_instance *ret, enum rp_check ctx, struct pt_regs *regs); extern bool arch_uprobe_ignore(struct arch_uprobe *aup, struct pt_regs *regs); extern void arch_uprobe_copy_ixol(struct page *page, unsigned long vaddr, void *src, unsigned long len); |