fluencelabs/wasmer
1
0
Fork 0
mirror of https://github.com/fluencelabs/wasmer synced 2025-07-04 02:51:33 +00:00
Code Issues Projects Releases Wiki Activity

runtime-core: Correctly allocate floating point registers for trampolines.

Browse Source
This commit is contained in:
losfair
2020-03-05 22:49:58 +08:00
parent 548f8b19a2
commit a5de17fb18
3 changed files with 152 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
lib/runtime-core/src/state.rs
View File

@ -610,6 +610,35 @@ pub mod x64_decl {
_ => return None,
})
}
/// Returns the instruction prefix for `movq %this_reg, ?(%rsp)`.
///
/// To build a instruction, append the memory location as a 32-bit
/// offset to the stack pointer to this prefix.
pub fn prefix_mov_to_stack(&self) -> Option<&'static [u8]> {
Some(match *self {
X64Register::GPR(gpr) => match gpr {
GPR::RDI => &[0x48, 0x89, 0xbc, 0x24],
GPR::RSI => &[0x48, 0x89, 0xb4, 0x24],
GPR::RDX => &[0x48, 0x89, 0x94, 0x24],
GPR::RCX => &[0x48, 0x89, 0x8c, 0x24],
GPR::R8 => &[0x4c, 0x89, 0x84, 0x24],
GPR::R9 => &[0x4c, 0x89, 0x8c, 0x24],
_ => return None,
},
X64Register::XMM(xmm) => match xmm {
XMM::XMM0 => &[0x66, 0x0f, 0xd6, 0x84, 0x24],
XMM::XMM1 => &[0x66, 0x0f, 0xd6, 0x8c, 0x24],
XMM::XMM2 => &[0x66, 0x0f, 0xd6, 0x94, 0x24],
XMM::XMM3 => &[0x66, 0x0f, 0xd6, 0x9c, 0x24],
XMM::XMM4 => &[0x66, 0x0f, 0xd6, 0xa4, 0x24],
XMM::XMM5 => &[0x66, 0x0f, 0xd6, 0xac, 0x24],
XMM::XMM6 => &[0x66, 0x0f, 0xd6, 0xb4, 0x24],
XMM::XMM7 => &[0x66, 0x0f, 0xd6, 0xbc, 0x24],
_ => return None,
},
})
}
}
}