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Add userland PMC backtracing, and use the PMC trapframe macros for kernel

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backtraces.

MFC after:	1 week
This commit is contained in:
Justin Hibbits 2013-12-14 20:12:28 +00:00
parent 46cf9b63fd
commit 0587a07215
1 changed files with 18 additions and 7 deletions
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25
sys/dev/hwpmc/hwpmc_powerpc.c
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@ -45,6 +45,8 @@ __FBSDID("$FreeBSD$");
#define INKERNEL(x) (((vm_offset_t)(x)) <= VM_MAX_KERNEL_ADDRESS && \
((vm_offset_t)(x)) >= VM_MIN_KERNEL_ADDRESS)
#define INUSER(x) (((vm_offset_t)(x)) <= VM_MAXUSER_ADDRESS && \
((vm_offset_t)(x)) >= VM_MIN_ADDRESS)
struct powerpc_cpu **powerpc_pcpu;
@ -55,13 +57,13 @@ pmc_save_kernel_callchain(uintptr_t *cc, int maxsamples,
int frames = 0;
uintptr_t *sp;
cc[frames++] = tf->srr0;
sp = (uintptr_t *)tf->fixreg[1];
cc[frames++] = PMC_TRAPFRAME_TO_PC(tf);
sp = (uintptr_t *)PMC_TRAPFRAME_TO_FP(tf);
for (frames = 1; frames < maxsamples; frames++) {
if (!INKERNEL(sp))
break;
cc[frames++] = *(sp + 1);
cc[frames++] = sp[1];
sp = (uintptr_t *)*sp;
}
return (frames);
@ -172,8 +174,17 @@ int
pmc_save_user_callchain(uintptr_t *cc, int maxsamples,
struct trapframe *tf)
{
(void) cc;
(void) maxsamples;
(void) tf;
return (0);
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);
}