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| author | David S. Miller <davem@davemloft.net> | 2018-01-09 18:37:00 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-01-09 18:37:00 +0300 |
| commit | a0ce093180f2bbb832b3f5583adc640ad67ea568 (patch) | |
| tree | 62c9aca5be3566ea4810e4584a02870de8b953f8 /arch/x86/include/asm/unwind.h | |
| parent | f4803f1b73f877a571be4c8e531dfcf190acc691 (diff) | |
| parent | ef7f8cec80a0ba7bd00ece46844c8994117dc910 (diff) | |
| download | linux-a0ce093180f2bbb832b3f5583adc640ad67ea568.tar.xz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'arch/x86/include/asm/unwind.h')
| -rw-r--r-- | arch/x86/include/asm/unwind.h | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/arch/x86/include/asm/unwind.h b/arch/x86/include/asm/unwind.h index c1688c2d0a12..1f86e1b0a5cd 100644 --- a/arch/x86/include/asm/unwind.h +++ b/arch/x86/include/asm/unwind.h @@ -56,18 +56,27 @@ void unwind_start(struct unwind_state *state, struct task_struct *task, #if defined(CONFIG_UNWINDER_ORC) || defined(CONFIG_UNWINDER_FRAME_POINTER) /* - * WARNING: The entire pt_regs may not be safe to dereference. In some cases, - * only the iret frame registers are accessible. Use with caution! + * If 'partial' returns true, only the iret frame registers are valid. */ -static inline struct pt_regs *unwind_get_entry_regs(struct unwind_state *state) +static inline struct pt_regs *unwind_get_entry_regs(struct unwind_state *state, + bool *partial) { if (unwind_done(state)) return NULL; + if (partial) { +#ifdef CONFIG_UNWINDER_ORC + *partial = !state->full_regs; +#else + *partial = false; +#endif + } + return state->regs; } #else -static inline struct pt_regs *unwind_get_entry_regs(struct unwind_state *state) +static inline struct pt_regs *unwind_get_entry_regs(struct unwind_state *state, + bool *partial) { return NULL; } |