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Initial back-edge CFI implementation (#3606)

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Give the user the option to sign and to authenticate function
return addresses with the operations introduced by the Pointer
Authentication extension to the Arm instruction set architecture.

Copyright (c) 2021, Arm Limited.
This commit is contained in:
Anton Kirilov
2022-08-03 19:08:29 +01:00
committed by GitHub
parent 709716bb8e
commit a897742593
17 changed files with 319 additions and 43 deletions
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8
cranelift/codegen/src/isa/x64/abi.rs
View File

@@ -3,7 +3,7 @@
use crate::ir::types::*;
use crate::ir::{self, types, ExternalName, LibCall, MemFlags, Opcode, Signature, TrapCode, Type};
use crate::isa;
use crate::isa::{unwind::UnwindInst, x64::inst::*, CallConv};
use crate::isa::{unwind::UnwindInst, x64::inst::*, x64::settings as x64_settings, CallConv};
use crate::machinst::abi_impl::*;
use crate::machinst::*;
use crate::settings;
@@ -29,9 +29,13 @@ pub(crate) type X64ABICaller = ABICallerImpl<X64ABIMachineSpec>;
/// Implementation of ABI primitives for x64.
pub(crate) struct X64ABIMachineSpec;
impl IsaFlags for x64_settings::Flags {}
impl ABIMachineSpec for X64ABIMachineSpec {
type I = Inst;
type F = x64_settings::Flags;
fn word_bits() -> u32 {
64
}
@@ -270,7 +274,7 @@ impl ABIMachineSpec for X64ABIMachineSpec {
}
}
fn gen_ret(rets: Vec<Reg>) -> Self::I {
fn gen_ret(_setup_frame: bool, _isa_flags: &x64_settings::Flags, rets: Vec<Reg>) -> Self::I {
Inst::ret(rets)
}

2
cranelift/codegen/src/isa/x64/mod.rs
View File

@@ -51,7 +51,7 @@ impl X64Backend {
// This performs lowering to VCode, register-allocates the code, computes
// block layout and finalizes branches. The result is ready for binary emission.
let emit_info = EmitInfo::new(flags.clone(), self.x64_flags.clone());
let abi = Box::new(abi::X64ABICallee::new(&func, self)?);
let abi = Box::new(abi::X64ABICallee::new(&func, self, &self.x64_flags)?);
compile::compile::<Self>(&func, self, abi, &self.reg_env, emit_info)
}
}