diff options
| author | Christoph Muellner <christoph.muellner@theobroma-systems.com> | 2019-04-05 13:03:46 +0200 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2019-04-23 20:26:43 -0600 |
| commit | 7ae31fccec16d4885f1704b089eb018be836f619 (patch) | |
| tree | 15f4fc440cdca7fd954ee2a5ecc226c82930aa7c /cmd | |
| parent | 62392675cdea46ca38a4d2b9be2c82e29b3b6da3 (diff) | |
common: command: Add command execution tracer.
When using boot scripts it can become quite hard to understand
which commands are actually executed during bootup (e.g. where
is a kernel image loaded from or which DTB is in use).
Shell scripts suffer from a similar problem and many shells address
this problem with a command execution tracer (e.g. BASH has xtrace,
which can be enabled by "set -x").
This patch introduces a command tracer for U-Boot, which prints
every command with its arguments before it is executed.
Signed-off-by: Christoph Muellner <christoph.muellner@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Diffstat (limited to 'cmd')
| -rw-r--r-- | cmd/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/cmd/Kconfig b/cmd/Kconfig index 2bdbfcb3d0..f6e7cd4303 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -53,6 +53,17 @@ config SYS_PROMPT This string is displayed in the command line to the left of the cursor. +config SYS_XTRACE + string "Command execution tracer" + depends on CMDLINE + default y if CMDLINE + help + This option enables the possiblity to print all commands before + executing them and after all variables are evaluated (similar + to Bash's xtrace/'set -x' feature). + To enable the tracer a variable "xtrace" needs to be defined in + the environment. + menu "Autoboot options" config AUTOBOOT |