linux-kernel - [RFC PATCH 1/3] config: provide a fragment to enable gdb for qemu

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Date:   Thu, 13 Dec 2018 13:29:08 +0100
From:   Anders Roxell <anders.roxell@...aro.org>
To:     linux-kernel@...r.kernel.org
Cc:     catalin.marinas@....com, will.deacon@....com, arnd@...db.de,
        mingo@...hat.com, rostedt@...dmis.org, akpm@...ux-foundation.org,
        broonie@...nel.org, Anders Roxell <anders.roxell@...aro.org>
Subject: [RFC PATCH 1/3] config: provide a fragment to enable gdb for qemu

Adding a fragment to make it easier to know what options is needed to
build a kernel to get the that you can debug in qemu.

First you need to start qemu with flags '-s -S' and then connect with
gdb like below:
$ gdb \
 ./obj-dir/vmlinux -iex 'add-auto-load-safe-path \
 ./obj-dir' -ex 'target remote localhost:1234'

Signed-off-by: Anders Roxell <anders.roxell@...aro.org>
---
 kernel/configs/qemu-gdb.config | 7 +++++++
 1 file changed, 7 insertions(+)
 create mode 100644 kernel/configs/qemu-gdb.config

diff --git a/kernel/configs/qemu-gdb.config b/kernel/configs/qemu-gdb.config
new file mode 100644
index 000000000000..30465905ff93
--- /dev/null
+++ b/kernel/configs/qemu-gdb.config
@@ -0,0 +1,7 @@
+# Enable debug info for gdb
+# CONFIG_COMPILE_TEST is not set
+CONFIG_DEBUG_INFO=y
+CONFIG_GDB_SCRIPTS=y
+
+# Easier to debug
+# CONFIG_RANDOMIZE_BASE is not set
-- 
2.19.2