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microblaze: Show return address from exception 

Show also return address from exception which should
suggest where the problem is.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
utp
Michal Simek 2015-01-26 14:32:23 +01:00
parent cd8574c0a7
commit 1c424d2697
2 changed files with 6 additions and 0 deletions
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2
arch/microblaze/cpu/exception.c
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@ -18,6 +18,8 @@ void _hw_exception_handler (void)
/* loading excetpion state register ESR */
MFS (state, resr);
printf ("Hardware exception at 0x%x address\n", address);
R17(address);
printf("Return address from exception 0x%x\n", address);
switch (state & 0x1f) { /* mask on exception cause */
case 0x1:
puts ("Unaligned data access exception\n");

4
arch/microblaze/include/asm/asm.h
View File

@ -43,6 +43,10 @@
#define R14(val) \
__asm__ __volatile__ ("addi %0, r14, 0":"=r" (val));
/* get return address from interrupt */
#define R17(val) \
__asm__ __volatile__ ("addi %0, r17, 0" : "=r" (val));
#define NOP __asm__ __volatile__ ("nop");
/* use machine status registe USE_MSR_REG */