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Bug 1930384 - add missing BTI instruction in aarch64 C stubs r=nika

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Differential Revision: https://phabricator.services.mozilla.com/D228562
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Landry Breuil 2024-11-22 16:11:57 +00:00
parent ef42dea31f
commit 1cf7038b94
1 changed files with 7 additions and 0 deletions
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7
xpcom/reflect/xptcall/md/unix/xptcstubs_aarch64.cpp
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@ -201,6 +201,12 @@ PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, void* args,
#define UNDERSCORE "_"
#endif
#if defined(__ARM_FEATURE_BTI_DEFAULT) && __ARM_FEATURE_BTI_DEFAULT == 1
#define VALID_CALL_TARGET "bti c\n\t"
#else
#define VALID_CALL_TARGET
#endif
// Load w17 with the constant 'n' and branch to SharedStub().
# define STUB_ENTRY(n) \
__asm__ ( \
@ -224,6 +230,7 @@ PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, void* args,
".else \n\t" \
".err \"stub number "#n" >= 1000 not yet supported\"\n" \
".endif \n\t" \
VALID_CALL_TARGET \
"mov w17,#"#n" \n\t" \
"b SharedStub \n" \
);