PERFORCE change 82559 for review

[Olivier Houchard]

http://perforce.freebsd.org/chv.cgi?CH=82559

Change 82559 by cognet at cognet on 2005/08/25 20:58:32

	Don't complain we can't read the process kernel stack if the stack
	pointer is 0. It will happen when debugging a live kernel, because
	then dumppcb will be all zeroed.

Affected files ...

.. //depot/projects/arm/gnu-arm.diff#6 edit

Differences ...

==== //depot/projects/arm/gnu-arm.diff#6 (text+ko) ====

@@ -999,8 +999,8 @@
 RCS file: gnu/usr.bin/gdb/kgdb/trgt_arm.c
 diff -N gnu/usr.bin/gdb/kgdb/trgt_arm.c
 --- /dev/null	1 Jan 1970 00:00:00 -0000
-+++ gnu/usr.bin/gdb/kgdb/trgt_arm.c	24 Aug 2005 11:14:23 -0000
-@@ -0,0 +1,81 @@
++++ gnu/usr.bin/gdb/kgdb/trgt_arm.c	25 Aug 2005 20:54:50 -0000
+@@ -0,0 +1,83 @@
 +/*
 + * Copyright (c) 2004 Marcel Moolenaar
 + * All rights reserved.
@@ -1063,18 +1063,20 @@
 +		supply_register(i, (char *)&pcb.un_32.pcb32_r8 + 
 +		    (i - (ARM_A1_REGNUM + 8 )) * 4);
 +	}
-+	for (i = 0; i < 4; i++) {
-+		if (kvm_read(kvm, pcb.un_32.pcb32_sp + (i) * 4,
-+		    &reg, 4) != 4) {
-+			warnx("kvm_read: %s", kvm_geterr(kvm));
-+			break;
++	if (pcb.un_32.pcb32_sp != 0) {
++		for (i = 0; i < 4; i++) {
++			if (kvm_read(kvm, pcb.un_32.pcb32_sp + (i) * 4,
++			    &reg, 4) != 4) {
++				warnx("kvm_read: %s", kvm_geterr(kvm));
++				break;
++			}
++			supply_register(ARM_A1_REGNUM + 4 + i, (char *)&reg);
 +		}
-+		supply_register(ARM_A1_REGNUM + 4 + i, (char *)&reg);
++		if (kvm_read(kvm, pcb.un_32.pcb32_sp + 4 * 4, &reg, 4) != 4)
++			warnx("kvm_read :%s", kvm_geterr(kvm));
++		else
++			supply_register(ARM_PC_REGNUM, (char *)&reg);
 +	}
-+	if (kvm_read(kvm, pcb.un_32.pcb32_sp + 4 * 4, &reg, 4) != 4)
-+		warnx("kvm_read :%s", kvm_geterr(kvm));
-+	else
-+		supply_register(ARM_PC_REGNUM, (char *)&reg);
 +}
 +
 +void