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| author | Josh Poimboeuf <jpoimboe@redhat.com> | 2017-04-12 13:47:11 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-04-14 10:19:59 +0200 |
| commit | 6bcdf9d51b9892dd5c6892d50cf5e9628efb8062 (patch) | |
| tree | 79cc242c58b542dba3ecac6ec9255a014014bf5e /arch/x86/include/asm/unwind.h | |
| parent | 5ed8d8bb38c5dcd78de540182cedb0fb19399aab (diff) | |
| download | linux-6bcdf9d51b9892dd5c6892d50cf5e9628efb8062.tar.gz linux-6bcdf9d51b9892dd5c6892d50cf5e9628efb8062.tar.bz2 linux-6bcdf9d51b9892dd5c6892d50cf5e9628efb8062.zip | |
x86/unwind: Read stack return address in update_stack_state()
Instead of reading the return address when unwind_get_return_address()
is called, read it from update_stack_state() and store it in the unwind
state. This enables the next patch to check the return address from
unwind_next_frame() so it can detect an entry code frame.
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Dave Jones <davej@codemonkey.org.uk>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/af0c5e4560c49c0343dca486ea26c4fa92bc4e35.1492020577.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/unwind.h')
| -rw-r--r-- | arch/x86/include/asm/unwind.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/unwind.h b/arch/x86/include/asm/unwind.h index 6fa75b17aec3..5663425f812f 100644 --- a/arch/x86/include/asm/unwind.h +++ b/arch/x86/include/asm/unwind.h @@ -14,6 +14,7 @@ struct unwind_state { #ifdef CONFIG_FRAME_POINTER unsigned long *bp, *orig_sp; struct pt_regs *regs; + unsigned long ip; #else unsigned long *sp; #endif |