int
pmc_save_user_callchain(uintptr_t *cc, int maxsamples,
struct trapframe *tf)
{
uintptr_t *sp;
int frames = 0;
cc[frames++] = PMC_TRAPFRAME_TO_PC(tf);
sp = (uintptr_t *)PMC_TRAPFRAME_TO_FP(tf);
for (; frames < maxsamples; frames++) {
if (!INUSER(sp))
break;
#ifdef __powerpc64__
/* Check if 32-bit mode. */
if (!(tf->srr1 & PSL_SF)) {
cc[frames++] = fuword32((uint32_t *)sp + 1);
sp = (uintptr_t *)(uintptr_t)fuword32(sp);
} else {
cc[frames++] = fuword(sp + 2);
sp = (uintptr_t *)fuword(sp);
}
#else
cc[frames++] = fuword32((uint32_t *)sp + 1);
sp = (uintptr_t *)fuword32(sp);
#endif
}
return (frames);
}
int
pmc_save_user_callchain(uintptr_t *cc, int maxsamples,
struct trapframe *tf)
{
uintptr_t *sp;
int frames = 0;
cc[frames++] = PMC_TRAPFRAME_TO_PC(tf);
sp = (uintptr_t *)PMC_TRAPFRAME_TO_FP(tf);
for (frames = 1; frames < maxsamples; frames++) {
if (!INUSER(sp))
break;
cc[frames++] = fuword(sp + 1);
sp = (uintptr_t *)fuword(sp);
}
return (frames);
}