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| H A D | setjmp_a64.S | 30e743f6b08776e41843a81d8f628c334f24e73f Mon Dec 13 08:03:10 UTC 2021 Ruchika Gupta <ruchika.gupta@linaro.org> lib: libutils: Use ret for longjmp with Clang and BTI
longjmp uses br instead of ret to jump to the target. Thus the target
location should have the right BTI launchpad to handle this.
clang has a bug [1] and doesn't add the BTI after setjmp causing
exception when BTI is enabled. This works well with gcc [2]
and can be tested when compiling xtests with WITH_CXX_TESTS=n.
To avoid the exception, use ret instead of br with clang and BTI.
[1] - https://bugs.llvm.org/show_bug.cgi?id=49544
[2] - https://gcc.gnu.org/legacy-ml/gcc-patches/2018-11/msg02472.html
Signed-off-by: Ruchika Gupta <ruchika.gupta@linaro.org>
Reviewed-by: Jerome Forissier <jerome@forissier.org>
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