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trace: select TIMER_EARLY to avoid infinite recursion

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When tracing functions is enabled this adds calls to
__cyg_profile_func_enter() and __cyg_profile_func_exit() to the traced
functions.

__cyg_profile_func_enter() and __cyg_profile_func_exit() invoke
timer_get_us() to record the entry and exit time.

initr_dm() will make gd->dm_root = NULL and gd->timer = NULL, so
timer_get_us() -> get_ticks() -> dm_timer_init() will lead to an
indefinite recursion.

So select TIMER_EARLY when tracing got enabled.

Signed-off-by: Pragnesh Patel <pragnesh.patel@sifive.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Rick Chen <rick@andestech.com>
This commit is contained in:
Pragnesh Patel 2021-01-17 18:11:24 +05:30 committed by Andes
parent 8f78e52794
commit a80f85138c
1 changed files with 1 additions and 0 deletions
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lib/Kconfig
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@ -210,6 +210,7 @@ config BITREVERSE
config TRACE
bool "Support for tracing of function calls and timing"
imply CMD_TRACE
select TIMER_EARLY
help
Enables function tracing within U-Boot. This allows recording of call
traces including timing information. The command can write data to