From 418515b21ed506449dfc9981265edec7800619b5 Mon Sep 17 00:00:00 2001
From: Tomas Vanek <vanekt@fbl.cz>
Date: Sat, 19 Jan 2019 15:58:49 +0100
Subject: [PATCH] target/arm_dap: fix segmentation fault in 'dap info' cmd

'dap info' command fails hard on a hla target.

Change-Id: Ia188b1afe527e0ed64512d1bddadd507f978e40b
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: http://openocd.zylin.com/4860
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
---
 src/target/arm_dap.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/target/arm_dap.c b/src/target/arm_dap.c
index 3adb4ed26..119e5117d 100644
--- a/src/target/arm_dap.c
+++ b/src/target/arm_dap.c
@@ -313,6 +313,11 @@ COMMAND_HANDLER(handle_dap_info_command)
 	struct adiv5_dap *dap = arm->dap;
 	uint32_t apsel;
 
+	if (dap == NULL) {
+		LOG_ERROR("DAP instance not available. Probably a HLA target...");
+		return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
+	}
+
 	switch (CMD_ARGC) {
 		case 0:
 			apsel = dap->apsel;