forked from luck/tmp_suning_uos_patched
85718fae2a
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>
40 lines
776 B
C
40 lines
776 B
C
/*
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* arch/ia64/kernel/stacktrace.c
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*
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* Stack trace management functions
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*
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*/
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#include <linux/sched.h>
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#include <linux/stacktrace.h>
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#include <linux/module.h>
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static void
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ia64_do_save_stack(struct unw_frame_info *info, void *arg)
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{
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struct stack_trace *trace = arg;
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unsigned long ip;
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int skip = trace->skip;
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trace->nr_entries = 0;
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do {
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unw_get_ip(info, &ip);
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if (ip == 0)
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break;
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if (skip == 0) {
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trace->entries[trace->nr_entries++] = ip;
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if (trace->nr_entries == trace->max_entries)
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break;
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} else
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skip--;
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} while (unw_unwind(info) >= 0);
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}
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/*
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* Save stack-backtrace addresses into a stack_trace buffer.
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*/
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void save_stack_trace(struct stack_trace *trace)
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{
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unw_init_running(ia64_do_save_stack, trace);
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}
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EXPORT_SYMBOL(save_stack_trace);
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