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GH-130887: Always remove trailing jumps in AArch64 JIT stencils (GH-131042)

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Diego Russo 2025-03-25 17:15:36 +00:00 • committed by GitHub
parent 0a91456ad1
commit ea0453ee97
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3 changed files with 35 additions and 9 deletions
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13
Tools/jit/_targets.py
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@ -44,6 +44,15 @@ class _Target(typing.Generic[_S, _R]):
verbose: bool = False
known_symbols: dict[str, int] = dataclasses.field(default_factory=dict)
def _get_nop(self) -> bytes:
if re.fullmatch(r"aarch64-.*", self.triple):
nop = b"\x1f\x20\x03\xD5"
elif re.fullmatch(r"x86_64-.*|i686.*", self.triple):
nop = b"\x90"
else:
raise ValueError(f"NOP not defined for {self.triple}")
return nop
def _compute_digest(self, out: pathlib.Path) -> str:
hasher = hashlib.sha256()
hasher.update(self.triple.encode())
@ -172,7 +181,9 @@ class _Target(typing.Generic[_S, _R]):
stencil_groups = {task.get_name(): task.result() for task in tasks}
for stencil_group in stencil_groups.values():
stencil_group.process_relocations(
known_symbols=self.known_symbols, alignment=self.alignment
known_symbols=self.known_symbols,
alignment=self.alignment,
nop=self._get_nop(),
)
return stencil_groups