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#include "stackTrace.h"
#include <rtems/bspIo.h>
#include <libcpu/spr.h>
SPR_RO(LR)
typedef struct FrameRec_ {
struct FrameRec_ *up;
void *lr;
} FrameRec, *Frame;
#define CPU_STACK_TRACE_DEPTH 40
void CPU_stack_take_snapshot(void **stack, int size, void *pc, void *lr, void *r1)
{
register Frame p = (Frame)lr;
register int i=0;
if (pc) stack[i++]=pc;
if (!p)
p = (Frame)_read_LR();
stack[i++]=p;
p = r1;
if (!p) /* no macro for reading user regs */
__asm__ __volatile__("mr %0, %%r1":"=r"(p));
for (; i<size-1 && p->up; p=p->up, i++) {
stack[i]=p->up->lr;
}
stack[i]=0;
}
void CPU_print_stack(void)
{
void *stck[CPU_STACK_TRACE_DEPTH];
int i;
CPU_stack_take_snapshot(stck,CPU_STACK_TRACE_DEPTH,0,0,0);
for (i=0; stck[i]; i++) {
if (i%5) printk("--> ");
else printk("\n");
printk("0x%08x",stck[i]);
}
printk("\n");
}
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