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cranelift: Use the default libcall names
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Some operations may not work in some older CPU's and may need to
be lowered to a libcall.

Signed-off-by: Afonso Bordado <afonsobordado@az8.co>
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@afonso360 @qmonnet
afonso360 authored and qmonnet committed Sep 6, 2023
1 parent ea1c556 commit 4812c52
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Showing 2 changed files with 16 additions and 29 deletions.
11 changes: 3 additions & 8 deletions src/cranelift.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,7 @@ use cranelift_codegen::{
ir::{
condcodes::IntCC,
types::{I16, I32, I64, I8},
AbiParam, Block, Endianness, FuncRef, Function, InstBuilder, LibCall, MemFlags, Signature,
AbiParam, Block, Endianness, FuncRef, Function, InstBuilder, MemFlags, Signature,
SourceLoc, StackSlotData, StackSlotKind, TrapCode, Type, UserFuncName, Value,
},
isa::OwnedTargetIsa,
Expand All @@ -29,12 +29,6 @@ use crate::ebpf::{

use super::Error;

fn libcall_names(libcall: LibCall) -> String {
match libcall {
_ => unimplemented!(),
}
}

pub type JittedFunction = extern "C" fn(
*mut u8, // mem_ptr
usize, // mem_len
Expand Down Expand Up @@ -84,7 +78,8 @@ impl CraneliftCompiler {
.finish(settings::Flags::new(flag_builder))
.unwrap();

let mut jit_builder = JITBuilder::with_isa(isa.clone(), Box::new(libcall_names));
let mut jit_builder =
JITBuilder::with_isa(isa.clone(), cranelift_module::default_libcall_names());
// Register all the helpers
for (k, v) in helpers.iter() {
let name = format!("helper_{}", k);
Expand Down
34 changes: 13 additions & 21 deletions tests/cranelift.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -2121,8 +2121,7 @@ fn test_cranelift_ldabsb() {
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff,
];
let mut vm = rbpf::EbpfVmRaw::new(Some(prog)).unwrap();
assert_eq!(vm.execute_program(mem).unwrap(), 0x33);
let mut vm = rbpf::EbpfVmFixedMbuff::new(Some(prog), 0x00, 0x08).unwrap();

vm.cranelift_compile().unwrap();
assert_eq!(vm.execute_program_cranelift(mem).unwrap(), 0x33);
Expand All @@ -2138,8 +2137,7 @@ fn test_cranelift_ldabsh() {
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff,
];
let mut vm = rbpf::EbpfVmRaw::new(Some(prog)).unwrap();
assert_eq!(vm.execute_program(mem).unwrap(), 0x4433);
let mut vm = rbpf::EbpfVmFixedMbuff::new(Some(prog), 0x00, 0x08).unwrap();

vm.cranelift_compile().unwrap();
assert_eq!(vm.execute_program_cranelift(mem).unwrap(), 0x4433);
Expand All @@ -2155,10 +2153,9 @@ fn test_cranelift_ldabsw() {
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff,
];
let mut vm = rbpf::EbpfVmRaw::new(Some(prog)).unwrap();
assert_eq!(vm.execute_program(mem).unwrap(), 0x66554433);
vm.cranelift_compile().unwrap();
let mut vm = rbpf::EbpfVmFixedMbuff::new(Some(prog), 0x00, 0x08).unwrap();

vm.cranelift_compile().unwrap();
assert_eq!(vm.execute_program_cranelift(mem).unwrap(), 0x66554433);
}

Expand All @@ -2172,10 +2169,9 @@ fn test_cranelift_ldabsdw() {
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff,
];
let mut vm = rbpf::EbpfVmRaw::new(Some(prog)).unwrap();
assert_eq!(vm.execute_program(mem).unwrap(), 0xaa99887766554433);
vm.cranelift_compile().unwrap();
let mut vm = rbpf::EbpfVmFixedMbuff::new(Some(prog), 0x00, 0x08).unwrap();

vm.cranelift_compile().unwrap();
assert_eq!(vm.execute_program_cranelift(mem).unwrap(), 0xaa99887766554433);
}

Expand All @@ -2190,11 +2186,10 @@ fn test_cranelift_ldindb() {
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff,
];
let mut vm = rbpf::EbpfVmRaw::new(Some(prog)).unwrap();
assert_eq!(vm.execute_program(mem).unwrap(), 0x88);
let mut vm = rbpf::EbpfVmFixedMbuff::new(Some(prog), 0x00, 0x08).unwrap();

vm.cranelift_compile().unwrap();
assert_eq!(vm.execute_program_cranelift(mem).unwrap(), 0x88);
assert_eq!(vm.execute_program_cranelift(mem).unwrap(), 0x88);
}

#[test]
Expand All @@ -2208,8 +2203,7 @@ fn test_cranelift_ldindh() {
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff,
];
let mut vm = rbpf::EbpfVmRaw::new(Some(prog)).unwrap();
assert_eq!(vm.execute_program(mem).unwrap(), 0x9988);
let mut vm = rbpf::EbpfVmFixedMbuff::new(Some(prog), 0x00, 0x08).unwrap();

vm.cranelift_compile().unwrap();
assert_eq!(vm.execute_program_cranelift(mem).unwrap(), 0x9988);
Expand All @@ -2226,10 +2220,9 @@ fn test_cranelift_ldindw() {
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff,
];
let mut vm = rbpf::EbpfVmRaw::new(Some(prog)).unwrap();
assert_eq!(vm.execute_program(mem).unwrap(), 0x88776655);
vm.cranelift_compile().unwrap();
let mut vm = rbpf::EbpfVmFixedMbuff::new(Some(prog), 0x00, 0x08).unwrap();

vm.cranelift_compile().unwrap();
assert_eq!(vm.execute_program_cranelift(mem).unwrap(), 0x88776655);
}

Expand All @@ -2244,9 +2237,8 @@ fn test_cranelift_ldinddw() {
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff,
];
let mut vm = rbpf::EbpfVmRaw::new(Some(prog)).unwrap();
assert_eq!(vm.execute_program(mem).unwrap(), 0xccbbaa9988776655);
vm.cranelift_compile().unwrap();
let mut vm = rbpf::EbpfVmFixedMbuff::new(Some(prog), 0x00, 0x08).unwrap();

vm.cranelift_compile().unwrap();
assert_eq!(vm.execute_program_cranelift(mem).unwrap(), 0xccbbaa9988776655);
}

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