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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/dl-tlsdesc.S | |
| parent | 9e1751e6d693b73b95db2f6d8438dd80f1aeffe0 (diff) | |
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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/dl-tlsdesc.S')
| -rw-r--r-- | sysdeps/aarch64/dl-tlsdesc.S | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/sysdeps/aarch64/dl-tlsdesc.S b/sysdeps/aarch64/dl-tlsdesc.S index 9d96c8632a..db8a064322 100644 --- a/sysdeps/aarch64/dl-tlsdesc.S +++ b/sysdeps/aarch64/dl-tlsdesc.S @@ -183,6 +183,10 @@ _dl_tlsdesc_dynamic: callee will trash. */ /* Save the remaining registers that we must treat as caller save. */ +# if HAVE_AARCH64_PAC_RET + PACIASP + cfi_window_save +# endif # define NSAVEXREGPAIRS 8 stp x29, x30, [sp,#-16*NSAVEXREGPAIRS]! cfi_adjust_cfa_offset (16*NSAVEXREGPAIRS) @@ -233,6 +237,10 @@ _dl_tlsdesc_dynamic: cfi_adjust_cfa_offset (-16*NSAVEXREGPAIRS) cfi_restore (x29) cfi_restore (x30) +# if HAVE_AARCH64_PAC_RET + AUTIASP + cfi_window_save +# endif b 1b cfi_endproc .size _dl_tlsdesc_dynamic, .-_dl_tlsdesc_dynamic |