diff options
| author | Kalesh Singh <kaleshsingh@google.com> | 2022-07-26 00:37:38 -0700 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-07-26 10:48:43 +0100 |
| commit | f51e7146740514347d6c5526a2c393e224a19c0d (patch) | |
| tree | 0cb8753590feee1b3d6bc054f44177ee7c3cee4e /arch/arm64/include/asm/stacktrace | |
| parent | 5b1b08619f50422c3e43d1fd7af257595a9e4a67 (diff) | |
arm64: stacktrace: Factor out common unwind()
Move unwind() to stacktrace/common.h, and as a result
the kernel unwind_next() to asm/stacktrace.h. This allow
reusing unwind() in the implementation of the nVHE HYP
stack unwinder, later in the series.
Signed-off-by: Kalesh Singh <kaleshsingh@google.com>
Reviewed-by: Fuad Tabba <tabba@google.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Tested-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220726073750.3219117-6-kaleshsingh@google.com
Diffstat (limited to 'arch/arm64/include/asm/stacktrace')
| -rw-r--r-- | arch/arm64/include/asm/stacktrace/common.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/stacktrace/common.h b/arch/arm64/include/asm/stacktrace/common.h index b241edba5c76..4b632141d91c 100644 --- a/arch/arm64/include/asm/stacktrace/common.h +++ b/arch/arm64/include/asm/stacktrace/common.h @@ -9,6 +9,7 @@ #include <linux/bitmap.h> #include <linux/bitops.h> +#include <linux/kprobes.h> #include <linux/types.h> enum stack_type { @@ -69,6 +70,8 @@ static inline bool on_accessible_stack(const struct task_struct *tsk, unsigned long sp, unsigned long size, struct stack_info *info); +static inline int unwind_next(struct unwind_state *state); + static inline bool on_stack(unsigned long sp, unsigned long size, unsigned long low, unsigned long high, enum stack_type type, struct stack_info *info) @@ -191,4 +194,20 @@ static inline int unwind_next_common(struct unwind_state *state, return 0; } + +static inline void notrace unwind(struct unwind_state *state, + stack_trace_consume_fn consume_entry, + void *cookie) +{ + while (1) { + int ret; + + if (!consume_entry(cookie, state->pc)) + break; + ret = unwind_next(state); + if (ret < 0) + break; + } +} +NOKPROBE_SYMBOL(unwind); #endif /* __ASM_STACKTRACE_COMMON_H */ |