static void
stack_capture(struct stack *st, struct frame *frame)
{
struct frame *fp;
vm_offset_t callpc;
stack_zero(st);
fp = frame;
for (;;) {
if (!INKERNEL((vm_offset_t)fp) ||
!ALIGNED_POINTER(fp, uint64_t))
break;
callpc = fp->fr_pc;
if (!INKERNEL(callpc))
break;
/* Don't bother traversing trap frames. */
if ((callpc > (uint64_t)tl_trap_begin &&
callpc < (uint64_t)tl_trap_end) ||
(callpc > (uint64_t)tl_text_begin &&
callpc < (uint64_t)tl_text_end))
break;
if (stack_put(st, callpc) == -1)
break;
if (v9next_frame(fp) <= fp ||
v9next_frame(fp) >= frame + KSTACK_PAGES * PAGE_SIZE)
break;
fp = v9next_frame(fp);
}
}
int
md_getframe(struct pstate *ps, int frame, struct md_frame *fram)
{
struct frame64 fr;
struct reg r;
reg fp, pc;
reg *outs;
int i;
if (process_getregs(ps, &r))
return (-1);
if (frame == 0) {
pc = r.r_pc;
fp = r.r_out[6] + BIAS;
/*
* XXX - we need some kind of heuristics here to decide
* if the function has done a save or not and then pick
* the in registers. the problem is just that there are
* no in registers in PT_GETREGS.
*/
outs = (reg *)&r.r_out;
goto out;
}
fp = r.r_out[6] + BIAS;
pc = r.r_out[7];
for (i = 1; i < frame; i++) {
/* Too low or unaligned frame pointer? */
if (fp < 8192 || (fp & 7) != 0)
return (-1);
if (process_read(ps, fp, &fr, sizeof(fr)) < 0)
return (-1);
fp = (unsigned long)v9next_frame((&fr));
pc = fr.fr_pc;
/* Too low or unaligned pc ? */
if ((pc < 8192) || (pc & 3) != 0)
return (-1);
outs = (reg *)&fr.fr_arg;
}
out:
fram->pc = pc;
fram->fp = fp;
fram->nargs = 6; /* XXX - don't know the real number */
for (i = 0; i < 6; i++) {
fram->args[i] = fr.fr_arg[i];
}
return (0);
}