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Allow arbitrary call data size (#135)

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Signed-off-by: Cyrill Leutwiler <bigcyrill@hotmail.com>
This commit is contained in:
Cyrill Leutwiler
2024-12-18 14:04:46 +01:00
committed by GitHub
parent afe44ad21b
commit 909de515c4
10 changed files with 999 additions and 1619 deletions
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crates/llvm-context/src/polkavm/evm/calldata.rs
+27 -29
View File
@@ -1,10 +1,7 @@
//! Translates the calldata instructions.
use crate::polkavm::context::address_space::AddressSpace;
use crate::polkavm::context::pointer::Pointer;
use crate::polkavm::context::Context;
use crate::polkavm::Dependency;
use inkwell::types::BasicType;
/// Translates the calldata load.
pub fn load<'ctx, D>(
@@ -14,19 +11,15 @@ pub fn load<'ctx, D>(
where
D: Dependency + Clone,
{
let calldata_pointer = context
.get_global(crate::polkavm::GLOBAL_CALLDATA_POINTER)?
.value
.as_pointer_value();
let offset = context.build_gep(
Pointer::new(context.byte_type(), AddressSpace::Stack, calldata_pointer),
&[offset],
context.word_type().as_basic_type_enum(),
"calldata_pointer_with_offset",
let output_pointer = context.build_alloca_at_entry(context.word_type(), "call_data_output");
let offset = context.safe_truncate_int_to_xlen(offset)?;
context.build_runtime_call(
revive_runtime_api::polkavm_imports::CALL_DATA_LOAD,
&[output_pointer.to_int(context).into(), offset.into()],
);
context
.build_load(offset, "calldata_value")
.and_then(|value| context.build_byte_swap(value))
context.build_load(output_pointer, "call_data_load_value")
}
/// Translates the calldata size.
@@ -37,8 +30,14 @@ where
D: Dependency + Clone,
{
let value = context.get_global_value(crate::polkavm::GLOBAL_CALLDATA_SIZE)?;
Ok(value)
Ok(context
.builder()
.build_int_z_extend(
value.into_int_value(),
context.word_type(),
"call_data_size_value",
)?
.into())
}
/// Translates the calldata copy.
@@ -51,20 +50,19 @@ pub fn copy<'ctx, D>(
where
D: Dependency + Clone,
{
let offset = context.safe_truncate_int_to_xlen(destination_offset)?;
let source_offset = context.safe_truncate_int_to_xlen(source_offset)?;
let size = context.safe_truncate_int_to_xlen(size)?;
let destination = context.build_heap_gep(offset, size)?;
let destination_offset = context.safe_truncate_int_to_xlen(destination_offset)?;
let output_pointer = context.build_heap_gep(destination_offset, size)?;
let calldata_pointer = context
.get_global(crate::polkavm::GLOBAL_CALLDATA_POINTER)?
.value
.as_pointer_value();
let source = context.build_gep(
Pointer::new(context.byte_type(), AddressSpace::Stack, calldata_pointer),
&[context.safe_truncate_int_to_xlen(source_offset)?],
context.byte_type(),
"calldata_pointer_with_offset",
context.build_runtime_call(
revive_runtime_api::polkavm_imports::CALL_DATA_COPY,
&[
output_pointer.to_int(context).into(),
size.into(),
source_offset.into(),
],
);
context.build_memcpy(destination, source, size, "calldata_copy_memcpy_from_child")
Ok(())
}