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Update for the KDB framework:

Browse Source 
o  s/ddb_on_nmi/kdb_on_nmi/g
o  Rename sysctl machdep.ddb_on_nmi to machdep.kdb_on_nmi
o  Make debugging support conditional upon KDB instead of DDB.
o  Call kdb_reenter() when kdb_active is non-zero.
o  Call kdb_trap() to enter the debugger when not already active.
o  Update comments accordingly.
o  Remove misplaced prototype of kdb_trap().
This commit is contained in:
Marcel Moolenaar 2004-07-10 22:11:14 +00:00
parent 2b61b0df4d
commit 6c29a22f1f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=131936
2 changed files with 22 additions and 26 deletions
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45
sys/i386/i386/trap.c
View File

@ -46,7 +46,6 @@ __FBSDID("$FreeBSD$");
#include "opt_clock.h"
#include "opt_cpu.h"
#include "opt_ddb.h"
#include "opt_isa.h"
#include "opt_ktrace.h"
#include "opt_npx.h"
@ -58,6 +57,7 @@ __FBSDID("$FreeBSD$");
#include <sys/proc.h>
#include <sys/pioctl.h>
#include <sys/ptrace.h>
#include <sys/kdb.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
#include <sys/lock.h>
@ -96,8 +96,6 @@ __FBSDID("$FreeBSD$");
#include <machine/clock.h>
#endif
#include <ddb/ddb.h>
extern void trap(struct trapframe frame);
#ifdef I386_CPU
extern int trapwrite(unsigned addr);
@ -147,10 +145,10 @@ static char *trap_msg[] = {
extern int has_f00f_bug;
#endif
#ifdef DDB
static int ddb_on_nmi = 1;
SYSCTL_INT(_machdep, OID_AUTO, ddb_on_nmi, CTLFLAG_RW,
&ddb_on_nmi, 0, "Go to DDB on NMI");
#ifdef KDB
static int kdb_on_nmi = 1;
SYSCTL_INT(_machdep, OID_AUTO, kdb_on_nmi, CTLFLAG_RW,
&kdb_on_nmi, 0, "Go to KDB on NMI");
#endif
static int panic_on_nmi = 1;
SYSCTL_INT(_machdep, OID_AUTO, panic_on_nmi, CTLFLAG_RW,
@ -188,10 +186,9 @@ trap(frame)
atomic_add_int(&cnt.v_trap, 1);
type = frame.tf_trapno;
#ifdef DDB
if (db_active) {
eva = (type == T_PAGEFLT ? rcr2() : 0);
trap_fatal(&frame, eva);
#ifdef KDB
if (kdb_active) {
kdb_reenter();
goto out;
}
#endif
@ -363,16 +360,16 @@ trap(frame)
/* machine/parity/power fail/"kitchen sink" faults */
/* XXX Giant */
if (isa_nmi(code) == 0) {
#ifdef DDB
#ifdef KDB
/*
* NMI can be hooked up to a pushbutton
* for debugging.
*/
if (ddb_on_nmi) {
if (kdb_on_nmi) {
printf ("NMI ... going to debugger\n");
kdb_trap (type, 0, &frame);
kdb_trap(type, 0, &frame);
}
#endif /* DDB */
#endif /* KDB */
goto userout;
} else if (panic_on_nmi)
panic("NMI indicates hardware failure");
@ -571,12 +568,12 @@ trap(frame)
*/
case T_BPTFLT:
/*
* If DDB is enabled, let it handle the debugger trap.
* If KDB is enabled, let it handle the debugger trap.
* Otherwise, debugger traps "can't happen".
*/
#ifdef DDB
#ifdef KDB
/* XXX Giant */
if (kdb_trap (type, 0, &frame))
if (kdb_trap(type, 0, &frame))
goto out;
#endif
break;
@ -596,16 +593,16 @@ trap(frame)
/* XXX Giant */
/* machine/parity/power fail/"kitchen sink" faults */
if (isa_nmi(code) == 0) {
#ifdef DDB
#ifdef KDB
/*
* NMI can be hooked up to a pushbutton
* for debugging.
*/
if (ddb_on_nmi) {
if (kdb_on_nmi) {
printf ("NMI ... going to debugger\n");
kdb_trap (type, 0, &frame);
kdb_trap(type, 0, &frame);
}
#endif /* DDB */
#endif /* KDB */
goto out;
} else if (panic_on_nmi == 0)
goto out;
@ -806,8 +803,8 @@ trap_fatal(frame, eva)
printf("Idle\n");
}
#ifdef DDB
if ((debugger_on_panic || db_active) && kdb_trap(type, 0, frame))
#ifdef KDB
if (kdb_trap(type, 0, frame))
return;
#endif
printf("trap number = %d\n", type);

3
sys/i386/include/frame.h
View File

@ -149,8 +149,7 @@ struct clockframe {
int cf_ss;
};
int kdb_trap(int, int, struct trapframe *);
#define CLOCK_TO_TRAPFRAME(frame) ((struct trapframe *)&(frame)->cf_fs)
#define INTR_TO_TRAPFRAME(frame) ((struct trapframe *)&(frame)->if_fs)
#endif /* _MACHINE_FRAME_H_ */