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| author | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2020-05-07 18:30:12 +0100 |
|---|---|---|
| committer | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2020-07-08 15:02:38 +0100 |
| commit | 9e1751e6d693b73b95db2f6d8438dd80f1aeffe0 (patch) | |
| tree | 40ece1a3b2681b7152ec3e7352e97bcd340e17b8 /config.h.in | |
| parent | de9301c02e898fb20a609b459d81afda42f39c61 (diff) | |
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aarch64: configure check for pac-ret code generation
Return address signing requires unwinder support, which is
present in libgcc since >=gcc-7, however due to bugs the
support may be broken in <gcc-10 (and similarly there may
be issues in custom unwinders), so pac-ret is not always
safe to use. So in assembly code glibc should only use
pac-ret if the compiler uses it too. Unfortunately there
is no predefined feature macro for it set by the compiler
so pac-ret is inferred from the code generation.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'config.h.in')
| -rw-r--r-- | config.h.in | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/config.h.in b/config.h.in index 67169e5d01..7921917ad2 100644 --- a/config.h.in +++ b/config.h.in @@ -112,6 +112,9 @@ /* AArch64 BTI support enabled. */ #define HAVE_AARCH64_BTI 0 +/* AArch64 PAC-RET code generation is enabled. */ +#define HAVE_AARCH64_PAC_RET 0 + /* C-SKY ABI version. */ #undef CSKYABI |