util/gdb-kstack.sh: script that resolves everything in a qemu kernel stack

Change-Id: Ia2ed9ff5a2aaae477d55f35b87407e19636a1c5b

util/gdb-kstack.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+if [ $# -lt 1 ]; then
+	echo "usage $0 host:port"
+	echo "	example: $0 localhost:1234"
+	exit 1
+fi
+remote=$1
+
+(
+	cat <<-EOF
+		set arch i386:x86-64
+		file sys/src/9/k10/9k8cpu.32bit
+		target remote $remote
+		set \$off = 0
+	EOF
+	for i in `seq 1 400`; do
+		#echo 'p/a *(void(**)())((long*)$sp+$off)'
+		echo 'info line **(void(**)())((long*)$sp+$off++)'
+	done
+	echo 'quit'
+) | gdb