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Blackfin: print out the faulting insn in the trace output

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Print out the faulting instruction so when people send traces as part of
bug reports, we have a better idea of what is going on.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Robin Getz 2010-03-12 21:17:44 +00:00 committed by Mike Frysinger
parent d28cff4b61
commit d60805ad47
1 changed files with 17 additions and 2 deletions
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19
arch/blackfin/kernel/trace.c
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@ -19,6 +19,7 @@
#include <asm/trace.h>
#include <asm/fixed_code.h>
#include <asm/traps.h>
#include <asm/irq_handler.h>
void decode_address(char *buf, unsigned long address)
{
@ -260,9 +261,10 @@ static void decode_instruction(unsigned short *address)
void dump_bfin_trace_buffer(void)
{
#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
int tflags, i = 0;
int tflags, i = 0, fault = 0;
char buf[150];
unsigned short *addr;
unsigned int cpu = raw_smp_processor_id();
#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
int j, index;
#endif
@ -277,8 +279,21 @@ void dump_bfin_trace_buffer(void)
if (likely(bfin_read_TBUFSTAT() & TBUFCNT)) {
for (; bfin_read_TBUFSTAT() & TBUFCNT; i++) {
decode_address(buf, (unsigned long)bfin_read_TBUF());
addr = (unsigned short *)bfin_read_TBUF();
decode_address(buf, (unsigned long)addr);
pr_notice("%4i Target : %s\n", i, buf);
/* Normally, the faulting instruction doesn't go into
* the trace buffer, (since it doesn't commit), so
* we print out the fault address here
*/
if (!fault && addr == (unsigned short *)trap &&
(cpu_pda[cpu].seqstat & SEQSTAT_EXCAUSE) > VEC_EXCPT15) {
decode_address(buf, cpu_pda[cpu].icplb_fault_addr);
pr_notice(" FAULT : %s ", buf);
decode_instruction((unsigned short *)cpu_pda[cpu].icplb_fault_addr);
pr_cont("\n");
fault = 1;
}
addr = (unsigned short *)bfin_read_TBUF();
decode_address(buf, (unsigned long)addr);
pr_notice(" Source : %s ", buf);