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disable sbrk and emulate EVM linear memory internally (#76)

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Signed-off-by: Cyrill Leutwiler <bigcyrill@hotmail.com>
Signed-off-by: xermicus <cyrill@parity.io>
This commit is contained in:
Cyrill Leutwiler
2024-10-14 15:20:00 +02:00
committed by GitHub
parent 92a18460e4
commit f0f344a139
12 changed files with 115 additions and 122 deletions
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crates/llvm-context/src/polkavm/evm/context.rs
-27
View File
@@ -107,33 +107,6 @@ where
Ok(context.word_const(0).as_basic_value_enum())
}
/// Translates the `msize` instruction.
pub fn msize<'ctx, D>(
context: &mut Context<'ctx, D>,
) -> anyhow::Result<inkwell::values::BasicValueEnum<'ctx>>
where
D: Dependency + Clone,
{
let heap_end = context.build_sbrk(context.xlen_type().const_zero())?;
let heap_start = context
.get_global(crate::polkavm::GLOBAL_HEAP_MEMORY_POINTER)?
.value
.as_pointer_value();
let heap_size = context.builder().build_int_nuw_sub(
context
.builder()
.build_ptr_to_int(heap_end, context.xlen_type(), "heap_end")?,
context
.builder()
.build_ptr_to_int(heap_start, context.xlen_type(), "heap_start")?,
"heap_size",
)?;
Ok(context
.builder()
.build_int_z_extend(heap_size, context.word_type(), "heap_size_extended")?
.as_basic_value_enum())
}
/// Translates the `address` instruction.
pub fn address<'ctx, D>(
context: &mut Context<'ctx, D>,