diff options
| author | Tom Hughes <tomhughes@chromium.org> | 2021-09-20 17:59:26 +0000 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2021-09-23 17:15:22 +0000 |
| commit | c1cc2d919e9f21adc0f992dcac00f6e8b282616d (patch) | |
| tree | f72c3c1529e6367e67437bf7e4e32ee914fd7900 | |
| parent | 541e3dee10752720c2bba7e4d81544eaa284bfc6 (diff) | |
| download | chrome-ec-c1cc2d919e9f21adc0f992dcac00f6e8b282616d.tar.gz | |
core/cortex-m: Disable warning in vecttable.c when building with clang
The vecttable logic explicitly routes unused IRQs to IRQ_UNUSED_OFFSET,
and then assigns it to "null" at the very end. The result is something
like:
[8] = __attribute__((used, weak, alias("default_handler")))
irq_55_handler(void);
[8] = __attribute__((used, weak, alias("default_handler")))
irq_56_handler(void);
...
[8] = (void*)0
This is intentional so that it works with a varying values for
CONFIG_IRQ_COUNT.
BRANCH=none
BUG=b:172020503
TEST=make buildall -j
Signed-off-by: Tom Hughes <tomhughes@chromium.org>
Change-Id: I3ba4eeaa46cd2c50c65c922f4c0c463ce1bb585e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3172038
Reviewed-by: Patrick Georgi <pgeorgi@chromium.org>
| -rw-r--r-- | core/cortex-m/vecttable.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/core/cortex-m/vecttable.c b/core/cortex-m/vecttable.c index d27962a7d8..10b4b22422 100644 --- a/core/cortex-m/vecttable.c +++ b/core/cortex-m/vecttable.c @@ -92,6 +92,14 @@ void svc_helper_handler() */ #define IRQ_UNUSED_OFFSET 8 +/* Disable warning that "initializer overrides prior initialization of this + * subobject", since we are explicitly doing this to handle the unused IRQs. + */ +#ifdef __clang__ +#pragma clang diagnostic push +#pragma clang diagnostic ignored "-Winitializer-overrides" +#endif /* __clang__ */ + #define table(x) \ const func vectors[] __attribute__((section(".text.vecttable"))) = { \ x \ @@ -379,6 +387,12 @@ table( irq(254) ) +#if PASS == 2 +#ifdef __clang__ +#pragma clang diagnostic pop +#endif /* __clang__ */ +#endif + #if PASS == 1 #undef PASS #define PASS 2 |