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[IA64] Add CONFIG_STACKTRACE_SUPPORT

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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>
This commit is contained in:
Tony Luck 2010-09-23 13:52:07 -07:00
parent 57aebd7739
commit 85718fae2a
3 changed files with 43 additions and 0 deletions
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3
arch/ia64/Kconfig
View File

@ -62,6 +62,9 @@ config NEED_SG_DMA_LENGTH
config SWIOTLB
bool
config STACKTRACE_SUPPORT
def_bool y
config GENERIC_LOCKBREAK
def_bool n

1
arch/ia64/kernel/Makefile
View File

@ -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

39
arch/ia64/kernel/stacktrace.c Normal file
View File

@ -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);