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fix backtracing through interrupt frames and system call frames

This commit is contained in:
dbj 2004-02-27 22:52:03 +00:00
parent 6a6547d143
commit d3e00c7d64
1 changed files with 15 additions and 4 deletions
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19
sys/arch/i386/i386/db_trace.c
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@ -1,4 +1,4 @@
/* $NetBSD: db_trace.c,v 1.41 2004/01/29 04:58:50 dbj Exp $ */
/* $NetBSD: db_trace.c,v 1.42 2004/02/27 22:52:03 dbj Exp $ */
/*
* Mach Operating System
@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: db_trace.c,v 1.41 2004/01/29 04:58:50 dbj Exp $");
__KERNEL_RCSID(0, "$NetBSD: db_trace.c,v 1.42 2004/02/27 22:52:03 dbj Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -220,7 +220,6 @@ db_nextframe(int **nextframe, int **retaddr, int **arg0, db_addr_t *ip,
/* The only argument to trap() or syscall() is the trapframe. */
tf = *(struct trapframe **)argp;
*ip = (db_addr_t)tf->tf_eip;
switch (is_trap) {
case TRAP:
(*pr)("--- trap (number %d) ---\n", tf->tf_trapno);
@ -230,8 +229,10 @@ db_nextframe(int **nextframe, int **retaddr, int **arg0, db_addr_t *ip,
break;
case INTERRUPT:
(*pr)("--- interrupt ---\n");
tf = (struct trapframe *)argp;
break;
}
*ip = (db_addr_t)tf->tf_eip;
fp = (struct i386_frame *)tf->tf_ebp;
if (fp == NULL)
return 0;
@ -259,6 +260,15 @@ db_nextframe(int **nextframe, int **retaddr, int **arg0, db_addr_t *ip,
break;
}
}
if (i == 4) {
(*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;
}
}
return 1;
}
@ -293,7 +303,8 @@ db_frame_info(int *frame, db_addr_t callpc, char **namep, db_expr_t *offp,
} else if (!strcmp(name, "trap")) {
*is_trap = TRAP;
narg = 0;
} else if (!strcmp(name, "syscall")) {
} else if (!strcmp(name, "syscall_plain") ||
!strcmp(name, "syscall_fancy")) {
*is_trap = SYSCALL;
narg = 0;
} else if (name[0] == 'X') {