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| author | Ard Biesheuvel <ardb@kernel.org> | 2023-03-27 12:10:06 +0200 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2023-03-30 11:05:22 +0000 |
| commit | 48d642a310b96e68465d724644510d3f6e381b2c (patch) | |
| tree | 1eb1294c05bda88363e075964e00f0c1873d7d0a /ArmPkg/Include | |
| parent | f8b1854b92559ad28dc6df6bb886652b87e2a422 (diff) | |
| download | edk2-48d642a310b96e68465d724644510d3f6e381b2c.zip edk2-48d642a310b96e68465d724644510d3f6e381b2c.tar.gz edk2-48d642a310b96e68465d724644510d3f6e381b2c.tar.bz2 | |
ArmPkg: Emit BTI opcodes when BTI codegen is enabled
When building with -mbranch-protection=bti, which affects the compiler
codegen only, ensure that the assembler based codegen is aligned with
this, by emitting the BTI C opcode at the start of each exported
function. While most exported functions are not in fact ever called
indirectly, whether or not this is the case is a property of the caller
so annotating every exported function is a reasonable default.
While at it, fix two occurrences in ArmPkg of exported functions that
did not use the ASM_FUNC() macro.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Leif Lindholm <quic_llindhol@quicinc.com>
Reviewed-by: Oliver Smith-Denny <osd@smith-denny.com>
Diffstat (limited to 'ArmPkg/Include')
| -rw-r--r-- | ArmPkg/Include/AsmMacroIoLibV8.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/ArmPkg/Include/AsmMacroIoLibV8.h b/ArmPkg/Include/AsmMacroIoLibV8.h index 2c2b1ca..135aaec 100644 --- a/ArmPkg/Include/AsmMacroIoLibV8.h +++ b/ArmPkg/Include/AsmMacroIoLibV8.h @@ -38,7 +38,8 @@ .global Name ; \
.section #Section, "ax" ; \
.type Name, %function ; \
- Name:
+ Name: ; \
+ AARCH64_BTI(c)
#define ASM_FUNC(Name) _ASM_FUNC(ASM_PFX(Name), .text. ## Name)
|