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authorOleg Nesterov <oleg@redhat.com>2015-07-21 15:40:26 +0200
committerIngo Molnar <mingo@kernel.org>2015-07-31 10:38:06 +0200
commit86dcb702e74b8ab7d3b2d36984ef00671cea73b9 (patch)
tree11ca9d381085a5936368c78203b0f3f505edfe30 /include/linux/uprobes.h
parenta5b7e1a89b820f2b9b23634ca4c59b555e8d9a0d (diff)
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.h7
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);