131 lines
3.3 KiB
C
131 lines
3.3 KiB
C
/*-
|
|
* Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
|
|
* All rights reserved.
|
|
*
|
|
* This software was developed by the University of Cambridge Computer
|
|
* Laboratory with support from ARM Ltd.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/pmc.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/pmap.h>
|
|
|
|
#include <machine/cpu.h>
|
|
#include <machine/md_var.h>
|
|
#include <machine/pmc_mdep.h>
|
|
#include <machine/stack.h>
|
|
#include <machine/vmparam.h>
|
|
|
|
struct pmc_mdep *
|
|
pmc_md_initialize(void)
|
|
{
|
|
|
|
return (pmc_arm64_initialize());
|
|
}
|
|
|
|
void
|
|
pmc_md_finalize(struct pmc_mdep *md)
|
|
{
|
|
|
|
pmc_arm64_finalize(md);
|
|
}
|
|
|
|
int
|
|
pmc_save_kernel_callchain(uintptr_t *cc, int maxsamples, struct trapframe *tf)
|
|
{
|
|
struct unwind_state frame;
|
|
int count;
|
|
|
|
KASSERT(TRAPF_USERMODE(tf) == 0,("[arm64,%d] not a kernel backtrace",
|
|
__LINE__));
|
|
|
|
frame.pc = PMC_TRAPFRAME_TO_PC(tf);
|
|
*cc++ = frame.pc;
|
|
|
|
if (maxsamples <= 1)
|
|
return (1);
|
|
|
|
frame.fp = PMC_TRAPFRAME_TO_FP(tf);
|
|
if (!PMC_IN_KERNEL(frame.pc) || !PMC_IN_KERNEL_STACK(frame.fp))
|
|
return (1);
|
|
|
|
for (count = 1; count < maxsamples; count++) {
|
|
if (!unwind_frame(curthread, &frame))
|
|
break;
|
|
if (!PMC_IN_KERNEL(frame.pc))
|
|
break;
|
|
*cc++ = frame.pc;
|
|
}
|
|
|
|
return (count);
|
|
}
|
|
|
|
int
|
|
pmc_save_user_callchain(uintptr_t *cc, int maxsamples,
|
|
struct trapframe *tf)
|
|
{
|
|
uintptr_t pc, r, oldfp, fp;
|
|
int count;
|
|
|
|
KASSERT(TRAPF_USERMODE(tf), ("[arm64,%d] Not a user trap frame tf=%p",
|
|
__LINE__, (void *) tf));
|
|
|
|
pc = PMC_TRAPFRAME_TO_PC(tf);
|
|
*cc++ = pc;
|
|
|
|
if (maxsamples <= 1)
|
|
return (1);
|
|
|
|
oldfp = fp = PMC_TRAPFRAME_TO_FP(tf);
|
|
|
|
if (!PMC_IN_USERSPACE(pc) ||
|
|
!PMC_IN_USERSPACE(fp))
|
|
return (1);
|
|
|
|
for (count = 1; count < maxsamples; count++) {
|
|
/* Use saved lr as pc. */
|
|
r = fp + sizeof(uintptr_t);
|
|
if (copyin((void *)r, &pc, sizeof(pc)) != 0)
|
|
break;
|
|
if (!PMC_IN_USERSPACE(pc))
|
|
break;
|
|
|
|
*cc++ = pc;
|
|
|
|
/* Switch to next frame up */
|
|
oldfp = fp;
|
|
r = fp;
|
|
if (copyin((void *)r, &fp, sizeof(fp)) != 0)
|
|
break;
|
|
if (fp < oldfp || !PMC_IN_USERSPACE(fp))
|
|
break;
|
|
}
|
|
|
|
return (count);
|
|
}
|