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/* $OpenBSD: db_trace.c,v 1.4 2003/10/15 01:06:13 drahn Exp $ */
/* $NetBSD: db_trace.c,v 1.15 1996/02/22 23:23:41 gwr Exp $ */
/*
* Mach Operating System
* Copyright (c) 1992 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <machine/db_machdep.h>
#include <machine/signal.h>
#include <machine/pcb.h>
#include <ddb/db_access.h>
#include <ddb/db_sym.h>
#include <ddb/db_variables.h>
#include <ddb/db_interface.h>
#include <ddb/db_output.h>
int db_read32(u_int32_t paddr, u_int32_t *value);
db_regs_t ddb_regs;
struct db_variable db_regs[] = {
{ "r0", (long *)&(DDB_REGS->tf.fixreg[0]), FCN_NULL },
{ "r1", (long *)&(DDB_REGS->tf.fixreg[1]), FCN_NULL },
{ "r2", (long *)&(DDB_REGS->tf.fixreg[2]), FCN_NULL },
{ "r3", (long *)&(DDB_REGS->tf.fixreg[3]), FCN_NULL },
{ "r4", (long *)&(DDB_REGS->tf.fixreg[4]), FCN_NULL },
{ "r5", (long *)&(DDB_REGS->tf.fixreg[5]), FCN_NULL },
{ "r6", (long *)&(DDB_REGS->tf.fixreg[6]), FCN_NULL },
{ "r7", (long *)&(DDB_REGS->tf.fixreg[7]), FCN_NULL },
{ "r8", (long *)&(DDB_REGS->tf.fixreg[8]), FCN_NULL },
{ "r9", (long *)&(DDB_REGS->tf.fixreg[9]), FCN_NULL },
{ "r10", (long *)&(DDB_REGS->tf.fixreg[10]), FCN_NULL },
{ "r11", (long *)&(DDB_REGS->tf.fixreg[11]), FCN_NULL },
{ "r12", (long *)&(DDB_REGS->tf.fixreg[12]), FCN_NULL },
{ "r13", (long *)&(DDB_REGS->tf.fixreg[13]), FCN_NULL },
{ "r14", (long *)&(DDB_REGS->tf.fixreg[13]), FCN_NULL },
{ "r15", (long *)&(DDB_REGS->tf.fixreg[13]), FCN_NULL },
{ "r16", (long *)&(DDB_REGS->tf.fixreg[13]), FCN_NULL },
{ "r17", (long *)&(DDB_REGS->tf.fixreg[17]), FCN_NULL },
{ "r18", (long *)&(DDB_REGS->tf.fixreg[18]), FCN_NULL },
{ "r19", (long *)&(DDB_REGS->tf.fixreg[19]), FCN_NULL },
{ "r20", (long *)&(DDB_REGS->tf.fixreg[20]), FCN_NULL },
{ "r21", (long *)&(DDB_REGS->tf.fixreg[21]), FCN_NULL },
{ "r22", (long *)&(DDB_REGS->tf.fixreg[22]), FCN_NULL },
{ "r23", (long *)&(DDB_REGS->tf.fixreg[23]), FCN_NULL },
{ "r24", (long *)&(DDB_REGS->tf.fixreg[24]), FCN_NULL },
{ "r25", (long *)&(DDB_REGS->tf.fixreg[25]), FCN_NULL },
{ "r26", (long *)&(DDB_REGS->tf.fixreg[26]), FCN_NULL },
{ "r27", (long *)&(DDB_REGS->tf.fixreg[27]), FCN_NULL },
{ "r28", (long *)&(DDB_REGS->tf.fixreg[28]), FCN_NULL },
{ "r29", (long *)&(DDB_REGS->tf.fixreg[29]), FCN_NULL },
{ "r30", (long *)&(DDB_REGS->tf.fixreg[30]), FCN_NULL },
{ "r31", (long *)&(DDB_REGS->tf.fixreg[31]), FCN_NULL },
{ "lr", (long *)&(DDB_REGS->tf.lr), FCN_NULL },
{ "cr", (long *)&(DDB_REGS->tf.cr), FCN_NULL },
{ "xer", (long *)&(DDB_REGS->tf.xer), FCN_NULL },
{ "ctr", (long *)&(DDB_REGS->tf.ctr), FCN_NULL },
{ "iar", (long *)&(DDB_REGS->tf.srr0), FCN_NULL },
{ "msr", (long *)&(DDB_REGS->tf.srr1), FCN_NULL },
};
struct db_variable *db_eregs = db_regs + sizeof(db_regs)/sizeof(db_regs[0]);
extern label_t *db_recover;
/*
* this is probably hackery.
*/
void
db_save_regs(struct trapframe *frame)
{
bcopy(frame, &(ddb_regs.tf), sizeof (struct trapframe));
}
int
db_read32(u_int32_t paddr, u_int32_t *value)
{
faultbuf env;
faultbuf *old_onfault = curpcb->pcb_onfault;
if (setfault(&env)) {
curpcb->pcb_onfault = old_onfault;
return EFAULT;
}
*value = *(u_int32_t *)paddr;
curpcb->pcb_onfault = old_onfault;
return 0;
}
db_expr_t
db_dumpframe(u_int32_t pframe, int (*pr)(const char *, ...))
{
u_int32_t nextframe;
u_int32_t lr;
char *name;
db_expr_t offset;
if (db_read32(pframe, &nextframe) == EFAULT) {
return 0;
}
if (db_read32(pframe+4, &lr) == EFAULT) {
return 0;
}
db_find_sym_and_offset(lr-4, &name, &offset);
if (!name) {
name = "0";
offset = lr-4;
}
(*pr)("%08x: %s+0x%x fp %x nfp %x\n",
lr-4, name, offset, pframe, nextframe);
return nextframe;
}
/*
* Frame tracing.
*/
void
db_stack_trace_print(db_expr_t addr, int have_addr, db_expr_t count,
char *modif, int (*pr)(const char *, ...))
{
if (count == 0 || count == -1)
count = INT_MAX;
if (have_addr == 0){
addr = ddb_regs.tf.fixreg[1];
}
while (addr != 0 && count > 0) {
addr = db_dumpframe(addr, pr);
count --;
}
}
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