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| author | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2020-04-29 11:49:20 +0100 |
|---|---|---|
| committer | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2020-07-08 15:02:38 +0100 |
| commit | 1be3d6eb823d8b952fa54b7bbc90cbecb8981380 (patch) | |
| tree | 4791e16bdb376f2a47f1e307d0316f7687cdd8e7 /sysdeps/aarch64/crti.S | |
| parent | 9e1751e6d693b73b95db2f6d8438dd80f1aeffe0 (diff) | |
| download | glibc-1be3d6eb823d8b952fa54b7bbc90cbecb8981380.tar.gz glibc-1be3d6eb823d8b952fa54b7bbc90cbecb8981380.tar.xz glibc-1be3d6eb823d8b952fa54b7bbc90cbecb8981380.zip | |
aarch64: Add pac-ret support to assembly files
Use return address signing in assembly files for functions that save LR when pac-ret is enabled in the compiler. The GNU property note for PAC-RET is not meaningful to the dynamic linker so it is not strictly required, but it may be used to track the security property of binaries. (The PAC-RET property is only set if BTI is set too because BTI implies working GNU property support.) Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'sysdeps/aarch64/crti.S')
| -rw-r--r-- | sysdeps/aarch64/crti.S | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/sysdeps/aarch64/crti.S b/sysdeps/aarch64/crti.S index c346bcad72..c486e9ca44 100644 --- a/sysdeps/aarch64/crti.S +++ b/sysdeps/aarch64/crti.S @@ -75,7 +75,11 @@ call_weak_fn: .hidden _init .type _init, %function _init: +#if HAVE_AARCH64_PAC_RET + PACIASP +#else BTI_C +#endif stp x29, x30, [sp, -16]! mov x29, sp #if PREINIT_FUNCTION_WEAK @@ -90,6 +94,10 @@ _init: .hidden _fini .type _fini, %function _fini: +#if HAVE_AARCH64_PAC_RET + PACIASP +#else BTI_C +#endif stp x29, x30, [sp, -16]! mov x29, sp |