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machinst x64: support out-of-bounds memory accesses;

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This commit is contained in:
Benjamin Bouvier
2020-07-08 15:22:00 +02:00
parent ea33ce9116
commit 5a55646fc3
6 changed files with 598 additions and 323 deletions
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15
cranelift/codegen/src/isa/x64/abi.rs
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@@ -364,6 +364,7 @@ impl ABIBody for X64ABIBody {
ext_mode,
RegMem::reg(from_reg.to_reg()),
dest_reg,
/* infallible load */ None,
));
}
(ArgumentExtension::Sext, Some(ext_mode)) => {
@@ -371,6 +372,7 @@ impl ABIBody for X64ABIBody {
ext_mode,
RegMem::reg(from_reg.to_reg()),
dest_reg,
/* infallible load */ None,
));
}
_ => ret.push(Inst::gen_move(dest_reg, from_reg.to_reg(), ty)),
@@ -394,6 +396,7 @@ impl ABIBody for X64ABIBody {
ext_mode,
RegMem::reg(from_reg.to_reg()),
from_reg,
/* infallible load */ None,
));
}
(ArgumentExtension::Sext, Some(ext_mode)) => {
@@ -401,6 +404,7 @@ impl ABIBody for X64ABIBody {
ext_mode,
RegMem::reg(from_reg.to_reg()),
from_reg,
/* infallible load */ None,
));
}
_ => {}
@@ -965,8 +969,13 @@ fn load_stack(mem: impl Into<SyntheticAmode>, into_reg: Writable<Reg>, ty: Type)
let mem = mem.into();
match ext_mode {
Some(ext_mode) => Inst::movsx_rm_r(ext_mode, RegMem::mem(mem), into_reg),
None => Inst::mov64_m_r(mem, into_reg),
Some(ext_mode) => Inst::movsx_rm_r(
ext_mode,
RegMem::mem(mem),
into_reg,
/* infallible load */ None,
),
None => Inst::mov64_m_r(mem, into_reg, None /* infallible */),
}
}
@@ -982,7 +991,7 @@ fn store_stack(mem: impl Into<SyntheticAmode>, from_reg: Reg, ty: Type) -> Inst
};
let mem = mem.into();
if is_int {
Inst::mov_r_m(size, from_reg, mem)
Inst::mov_r_m(size, from_reg, mem, /* infallible store */ None)
} else {
unimplemented!("f32/f64 store_stack");
}