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| 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 /common | |
| parent | 62392675cdea46ca38a4d2b9be2c82e29b3b6da3 (diff) | |
| download | u-boot-7ae31fccec16d4885f1704b089eb018be836f619.zip u-boot-7ae31fccec16d4885f1704b089eb018be836f619.tar.gz u-boot-7ae31fccec16d4885f1704b089eb018be836f619.tar.bz2 | |
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 'common')
| -rw-r--r-- | common/command.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/common/command.c b/common/command.c index e14d1fa..e192bb2 100644 --- a/common/command.c +++ b/common/command.c @@ -574,6 +574,20 @@ enum command_ret_t cmd_process(int flag, int argc, char * const argv[], enum command_ret_t rc = CMD_RET_SUCCESS; cmd_tbl_t *cmdtp; +#if defined(CONFIG_SYS_XTRACE) + char *xtrace; + + xtrace = env_get("xtrace"); + if (xtrace) { + puts("+"); + for (int i = 0; i < argc; i++) { + puts(" "); + puts(argv[i]); + } + puts("\n"); + } +#endif + /* Look up command in command table */ cmdtp = find_cmd(argv[0]); if (cmdtp == NULL) { |