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Cargo fmt

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This commit is contained in:
losfair
2019-06-05 01:11:54 +08:00
parent 8a74399c6e
commit b2869e181c
1 changed files with 14 additions and 21 deletions
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35
lib/runtime-core/src/trampoline_x64.rs
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@ -41,10 +41,7 @@ pub struct TrampolineBuffer {
fn value_to_bytes<T: Copy>(ptr: &T) -> &[u8] { fn value_to_bytes<T: Copy>(ptr: &T) -> &[u8] {
unsafe { unsafe {
::std::slice::from_raw_parts( ::std::slice::from_raw_parts(ptr as *const T as *const u8, ::std::mem::size_of::<T>())
ptr as *const T as *const u8,
::std::mem::size_of::<T>(),
)
} }
} }
@ -86,7 +83,7 @@ impl TrampolineBufferBuilder {
pub fn add_callinfo_trampoline( pub fn add_callinfo_trampoline(
&mut self, &mut self,
target: unsafe extern "C" fn (*const CallContext, *const u64) -> u64, target: unsafe extern "C" fn(*const CallContext, *const u64) -> u64,
context: *const CallContext, context: *const CallContext,
num_params: u32, num_params: u32,
) -> usize { ) -> usize {
@ -98,9 +95,7 @@ impl TrampolineBufferBuilder {
stack_offset += 8; stack_offset += 8;
} }
self.code.extend_from_slice(&[ self.code.extend_from_slice(&[0x48, 0x81, 0xec]); // sub ?, %rsp
0x48, 0x81, 0xec,
]); // sub ?, %rsp
self.code.extend_from_slice(value_to_bytes(&stack_offset)); self.code.extend_from_slice(value_to_bytes(&stack_offset));
for i in 0..num_params { for i in 0..num_params {
match i { match i {
@ -122,13 +117,11 @@ impl TrampolineBufferBuilder {
self.code.extend_from_slice(&[ self.code.extend_from_slice(&[
0x48, 0x8b, 0x84, 0x24, // mov ?(%rsp), %rax 0x48, 0x8b, 0x84, 0x24, // mov ?(%rsp), %rax
]); ]);
self.code.extend_from_slice(value_to_bytes(&( self.code.extend_from_slice(value_to_bytes(
(i - 6) * 8u32 + stack_offset + 8 /* ret addr */ &((i - 6) * 8u32 + stack_offset + 8/* ret addr */),
))); ));
// mov %rax, ?(%rsp) // mov %rax, ?(%rsp)
self.code.extend_from_slice(&[ self.code.extend_from_slice(&[0x48, 0x89, 0x84, 0x24]);
0x48, 0x89, 0x84, 0x24,
]);
self.code.extend_from_slice(value_to_bytes(&(i * 8u32))); self.code.extend_from_slice(value_to_bytes(&(i * 8u32)));
} }
} }
@ -213,15 +206,15 @@ mod tests {
} }
let mut builder = TrampolineBufferBuilder::new(); let mut builder = TrampolineBufferBuilder::new();
let ctx = TestContext { value: 100 }; let ctx = TestContext { value: 100 };
let idx = builder.add_callinfo_trampoline( let idx =
do_add, builder.add_callinfo_trampoline(do_add, &ctx as *const TestContext as *const _, 8);
&ctx as *const TestContext as *const _,
8,
);
let buf = builder.build(); let buf = builder.build();
let t = buf.get_trampoline(idx); let t = buf.get_trampoline(idx);
let ret = let ret = unsafe {
unsafe { ::std::mem::transmute::<_, extern "C" fn(i32, i32, i32, i32, i32, i32, i32, i32) -> i32>(t)(1, 2, 3, 4, 5, 6, 7, 8) as i32 }; ::std::mem::transmute::<_, extern "C" fn(i32, i32, i32, i32, i32, i32, i32, i32) -> i32>(
t,
)(1, 2, 3, 4, 5, 6, 7, 8) as i32
};
assert_eq!(ret, 136); assert_eq!(ret, 136);
} }
} }