Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

allow err of IREENT_MAGIC when looking for interrupt frames

Browse Source
This commit is contained in:
dbj 2004-02-28 20:30:58 +00:00
parent 26e2172ca7
commit 5b782a2183
1 changed files with 5 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
sys/arch/i386/i386/db_trace.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: db_trace.c,v 1.44 2004/02/28 02:58:35 dbj Exp $ */
/* $NetBSD: db_trace.c,v 1.45 2004/02/28 20:30:58 dbj Exp $ */
/*
* Mach Operating System
@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: db_trace.c,v 1.44 2004/02/28 02:58:35 dbj Exp $");
__KERNEL_RCSID(0, "$NetBSD: db_trace.c,v 1.45 2004/02/28 20:30:58 dbj Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -245,8 +245,8 @@ db_nextframe(int **nextframe, int **retaddr, int **arg0, db_addr_t *ip,
/*
* A bit of a hack. Since %ebp may be used in the stub code,
* walk the stack looking for a valid interrupt frame. Such
* a frame can be recognized by always having err 0 and
* trapno T_ASTFLT.
* a frame can be recognized by always having
* err 0 or IREENT_MAGIC and trapno T_ASTFLT.
*/
if (db_frame_info(*nextframe, (db_addr_t)*ip, NULL, NULL, &traptype,
NULL) != (db_sym_t)0
@ -255,7 +255,7 @@ db_nextframe(int **nextframe, int **retaddr, int **arg0, db_addr_t *ip,
ifp = (struct intrframe *)(argp + i);
err = db_get_value((int)&ifp->__if_err, 4, FALSE);
trapno = db_get_value((int)&ifp->__if_trapno, 4, FALSE);
if (err == 0 && trapno == T_ASTFLT) {
if ((err == 0 || err == IREENT_MAGIC) && trapno == T_ASTFLT) {
*nextframe = (int *)ifp - 1;
break;
}
@ -264,9 +264,6 @@ db_nextframe(int **nextframe, int **retaddr, int **arg0, db_addr_t *ip,
(*pr)("DDB lost frame for ");
db_printsym(*ip, DB_STGY_ANY, pr);
(*pr)(", trying %p\n",argp);
/* I observe that the frame can be often found here, although
* it has an err value of 0x18041969 instead of 0
* I don't know why. -- dbj */
*nextframe = argp;
}
}