diff options
| author | Tony Luck <tony.luck@intel.com> | 2010-09-23 13:52:07 -0700 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2010-09-23 13:52:07 -0700 |
| commit | 85718fae2a8d845e66762e6464152a255e323777 (patch) | |
| tree | e06745ac70e457517bf14a8b7f71e026989612b5 /arch/ia64 | |
| parent | 57aebd7739c8dbbf403876ee1e9673fafc83d856 (diff) | |
[IA64] Add CONFIG_STACKTRACE_SUPPORT
Several Linux features are dependent on stack trace support. Add
it so they can be enabled.
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64')
| -rw-r--r-- | arch/ia64/Kconfig | 3 | ||||
| -rw-r--r-- | arch/ia64/kernel/Makefile | 1 | ||||
| -rw-r--r-- | arch/ia64/kernel/stacktrace.c | 39 |
3 files changed, 43 insertions, 0 deletions
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig index ba22849ee3e..e93f44e62ed 100644 --- a/arch/ia64/Kconfig +++ b/arch/ia64/Kconfig @@ -62,6 +62,9 @@ config NEED_SG_DMA_LENGTH config SWIOTLB bool +config STACKTRACE_SUPPORT + def_bool y + config GENERIC_LOCKBREAK def_bool n diff --git a/arch/ia64/kernel/Makefile b/arch/ia64/kernel/Makefile index db10b1e378b..395c2f216dd 100644 --- a/arch/ia64/kernel/Makefile +++ b/arch/ia64/kernel/Makefile @@ -34,6 +34,7 @@ obj-$(CONFIG_AUDIT) += audit.o obj-$(CONFIG_PCI_MSI) += msi_ia64.o mca_recovery-y += mca_drv.o mca_drv_asm.o obj-$(CONFIG_IA64_MC_ERR_INJECT)+= err_inject.o +obj-$(CONFIG_STACKTRACE) += stacktrace.o obj-$(CONFIG_PARAVIRT) += paravirt.o paravirtentry.o \ paravirt_patch.o diff --git a/arch/ia64/kernel/stacktrace.c b/arch/ia64/kernel/stacktrace.c new file mode 100644 index 00000000000..5af2783a87f --- /dev/null +++ b/arch/ia64/kernel/stacktrace.c @@ -0,0 +1,39 @@ +/* + * arch/ia64/kernel/stacktrace.c + * + * Stack trace management functions + * + */ +#include <linux/sched.h> +#include <linux/stacktrace.h> +#include <linux/module.h> + +static void +ia64_do_save_stack(struct unw_frame_info *info, void *arg) +{ + struct stack_trace *trace = arg; + unsigned long ip; + int skip = trace->skip; + + trace->nr_entries = 0; + do { + unw_get_ip(info, &ip); + if (ip == 0) + break; + if (skip == 0) { + trace->entries[trace->nr_entries++] = ip; + if (trace->nr_entries == trace->max_entries) + break; + } else + skip--; + } while (unw_unwind(info) >= 0); +} + +/* + * Save stack-backtrace addresses into a stack_trace buffer. + */ +void save_stack_trace(struct stack_trace *trace) +{ + unw_init_running(ia64_do_save_stack, trace); +} +EXPORT_SYMBOL(save_stack_trace); |