/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
* $FreeBSD: head/sys/cddl/dev/dtrace/arm/dtrace_isa.c 295882 2016-02-22 09:08:04Z skra $
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <machine/frame.h>
#include <machine/reg.h>
#include <machine/db_machdep.h>
#include <machine/vmparam.h>
#include <ddb/db_sym.h>
#include <ddb/ddb.h>
uintptr_t kernelbase = (uintptr_t)KERNEL_BASE;
/* TODO: support AAPCS */
/* XXX: copied from sys/arch/arm/arm/db_trace.c */
#define INKERNEL(va) (((vaddr_t)(va)) >= VM_MIN_KERNEL_ADDRESS)
#define FR_SCP (0)
#define FR_RLV (-1)
#define FR_RSP (-2)
#define FR_RFP (-3)
#include "regset.h"
/*
* Wee need some reasonable default to prevent backtrace code
* from wandering too far
*/
#define MAX_FUNCTION_SIZE 0x10000
#define MAX_PROLOGUE_SIZE 0x100
uint8_t dtrace_fuword8_nocheck(void *);
uint16_t dtrace_fuword16_nocheck(void *);
uint32_t dtrace_fuword32_nocheck(void *);
uint64_t dtrace_fuword64_nocheck(void *);
void
dtrace_getpcstack(pc_t *pcstack, int pcstack_limit, int aframes,
uint32_t *intrpc)
{
uint32_t *frame, *lastframe;
#if 0
int scp_offset;
#endif
int depth = 0;
pc_t caller = (pc_t) solaris_cpu[cpu_number()].cpu_dtrace_caller;
if (intrpc != 0)
pcstack[depth++] = (pc_t) intrpc;
aframes++;
frame = (uint32_t *)__builtin_frame_address(0);;
lastframe = NULL;
#if 0
scp_offset = -(get_pc_str_offset() >> 2);
#endif
while ((frame != NULL) && (depth < pcstack_limit)) {
db_addr_t scp;
#if 0
uint32_t savecode;
int r;
uint32_t *rp;
#endif
/*
* In theory, the SCP isn't guaranteed to be in the function
* that generated the stack frame. We hope for the best.
*/
scp = frame[FR_SCP];
if (aframes > 0) {
aframes--;
if ((aframes == 0) && (caller != 0)) {
pcstack[depth++] = caller;
}
}
else {
pcstack[depth++] = scp;
}
#if 0
savecode = ((uint32_t *)scp)[scp_offset];
if ((savecode & 0x0e100000) == 0x08000000) {
/* Looks like an STM */
rp = frame - 4;
for (r = 10; r >= 0; r--) {
if (savecode & (1 << r)) {
/* register r == *rp-- */
}
}
}
#endif
/*
* Switch to next frame up
*/
if (frame[FR_RFP] == 0)
break; /* Top of stack */
lastframe = frame;
frame = (uint32_t *)(frame[FR_RFP]);
if (INKERNEL((int)frame)) {
/* staying in kernel */
if (frame <= lastframe) {
/* bad frame pointer */
break;
}
}
else
break;
}
for (; depth < pcstack_limit; depth++) {
pcstack[depth] = 0;
}
}
void
dtrace_getupcstack(uint64_t *pcstack, int pcstack_limit)
{
printf("IMPLEMENT ME: %s\n", __func__);
}
int
dtrace_getustackdepth(void)
{
printf("IMPLEMENT ME: %s\n", __func__);
return (0);
}
void
dtrace_getufpstack(uint64_t *pcstack, uint64_t *fpstack, int pcstack_limit)
{
printf("IMPLEMENT ME: %s\n", __func__);
}
/*ARGSUSED*/
uint64_t
dtrace_getarg(int arg, int aframes)
{
/* struct arm_frame *fp = (struct arm_frame *)dtrace_getfp();*/
printf("IMPLEMENT ME: %s\n", __func__);
return (0);
}
int
dtrace_getstackdepth(int aframes)
{
uint32_t *frame, *lastframe;
int depth = 1;
frame = (uint32_t *)__builtin_frame_address(0);;
lastframe = NULL;
while (frame != NULL) {
#if 0
uint32_t savecode;
int r;
uint32_t *rp;
#endif
depth++;
/*
* Switch to next frame up
*/
if (frame[FR_RFP] == 0)
break; /* Top of stack */
lastframe = frame;
frame = (uint32_t *)(frame[FR_RFP]);
if (INKERNEL((int)frame)) {
/* staying in kernel */
if (frame <= lastframe) {
/* bad frame pointer */
break;
}
}
else
break;
}
if (depth < aframes)
return 0;
else
return depth - aframes;
}
ulong_t
dtrace_getreg(struct trapframe *rp, uint_t reg)
{
printf("IMPLEMENT ME: %s\n", __func__);
return (0);
}
static int
dtrace_copycheck(uintptr_t uaddr, uintptr_t kaddr, size_t size)
{
if (uaddr + size > VM_MAXUSER_ADDRESS || uaddr + size < uaddr) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR);
cpu_core[cpu_number()].cpuc_dtrace_illval = uaddr;
return (0);
}
return (1);
}
void
dtrace_copyin(uintptr_t uaddr, uintptr_t kaddr, size_t size,
volatile uint16_t *flags)
{
if (dtrace_copycheck(uaddr, kaddr, size))
dtrace_copy(uaddr, kaddr, size);
}
void
dtrace_copyout(uintptr_t kaddr, uintptr_t uaddr, size_t size,
volatile uint16_t *flags)
{
if (dtrace_copycheck(uaddr, kaddr, size))
dtrace_copy(kaddr, uaddr, size);
}
void
dtrace_copyinstr(uintptr_t uaddr, uintptr_t kaddr, size_t size,
volatile uint16_t *flags)
{
if (dtrace_copycheck(uaddr, kaddr, size))
dtrace_copystr(uaddr, kaddr, size, flags);
}
void
dtrace_copyoutstr(uintptr_t kaddr, uintptr_t uaddr, size_t size,
volatile uint16_t *flags)
{
if (dtrace_copycheck(uaddr, kaddr, size))
dtrace_copystr(kaddr, uaddr, size, flags);
}
uint8_t
dtrace_fuword8(void *uaddr)
{
if ((uintptr_t)uaddr > VM_MAXUSER_ADDRESS) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR);
cpu_core[cpu_number()].cpuc_dtrace_illval = (uintptr_t)uaddr;
return (0);
}
return (dtrace_fuword8_nocheck(uaddr));
}
uint16_t
dtrace_fuword16(void *uaddr)
{
if ((uintptr_t)uaddr > VM_MAXUSER_ADDRESS) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR);
cpu_core[cpu_number()].cpuc_dtrace_illval = (uintptr_t)uaddr;
return (0);
}
return (dtrace_fuword16_nocheck(uaddr));
}
uint32_t
dtrace_fuword32(void *uaddr)
{
if ((uintptr_t)uaddr > VM_MAXUSER_ADDRESS) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR);
cpu_core[cpu_number()].cpuc_dtrace_illval = (uintptr_t)uaddr;
return (0);
}
return (dtrace_fuword32_nocheck(uaddr));
}
uint64_t
dtrace_fuword64(void *uaddr)
{
if ((uintptr_t)uaddr > VM_MAXUSER_ADDRESS) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR);
cpu_core[cpu_number()].cpuc_dtrace_illval = (uintptr_t)uaddr;
return (0);
}
return (dtrace_fuword64_nocheck(uaddr));
}