/*
* Return the address of the saved pc in frame.
*/
CORE_ADDR
addr_of_pc(struct frame_info *frame)
{
#ifdef KERNELDEBUG
static CORE_ADDR tstart, tend, istart, iend;
CORE_ADDR pc;
unsigned long addr;
if (kernel_debugging && frame->next) {
if (tstart == 0) {
tstart = ksym_lookup("Xdiv");
tend = ksym_lookup("Xsyscall");
istart = ksym_lookup("Vclk");
iend = ksym_lookup("doreti");
}
pc = FRAME_SAVED_PC(frame->next);
if (tstart <= pc && pc < tend) {
struct trapframe *tfr = (struct trapframe *)
(frame->next->frame + 8);
return ((CORE_ADDR)&tfr->tf_eip);
}
if (istart <= pc && pc < iend) {
struct intrframe *ifr = (struct intrframe *)
(frame->next->frame + 8);
return ((CORE_ADDR)&ifr->if_eip);
}
}
#endif
return ((CORE_ADDR)(frame->next->frame + 4));
}
void sampling_stats(int **hitcountp, int **symid_list)
{
int i, symid;
/* init data */
sort(sampled_pc, MAX_SAMPLING_COUNT, sizeof(sampled_pc[0]), cmp_addr);
for (i = 0; i < MAX_KSYM; i++) {
ksym_hitcount[i] = 0;
ksymid_sortedlist[i] = i;
}
/* calculation total hit for each ksym */
for (i = 0; i < MAX_SAMPLING_COUNT; i++) {
symid = ksym_lookup(sampled_pc[i]);
if (symid < 0)
continue;
ksym_hitcount[symid]++;
}
/* create a list from highest hit to lowest hit */
sort(ksymid_sortedlist, ksym_total(),
sizeof(ksymid_sortedlist[0]), cmp_symhit);
/* output the result */
*hitcountp = ksym_hitcount;
*symid_list = ksymid_sortedlist;
}
/*
* Return the current proc. masterprocp points to
* current proc which points to current u area.
*/
static struct pcb *
fetch_cpcb()
{
struct pcb *p;
static CORE_ADDR curpcb_addr;
if (!curpcb_addr)
curpcb_addr = ksym_lookup("curpcb");
if (READMEM(curpcb_addr, &p))
error("cannot read curpcb pointer at 0x%x\n", curpcb_addr);
return (p);
}
