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xermicus
77 lines
2.3 KiB
Rust
77 lines
2.3 KiB
Rust
//! Translates the calldata instructions.
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use crate::polkavm::context::address_space::AddressSpace;
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use crate::polkavm::context::pointer::Pointer;
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use crate::polkavm::context::Context;
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use crate::polkavm::Dependency;
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use inkwell::types::BasicType;
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/// Translates the calldata load.
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pub fn load<'ctx, D>(
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context: &mut Context<'ctx, D>,
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offset: inkwell::values::IntValue<'ctx>,
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) -> anyhow::Result<inkwell::values::BasicValueEnum<'ctx>>
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where
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D: Dependency + Clone,
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{
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let calldata_pointer = context
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.get_global(crate::polkavm::GLOBAL_CALLDATA_POINTER)?
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.value
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.as_pointer_value();
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let offset = context.build_gep(
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Pointer::new(context.byte_type(), AddressSpace::Stack, calldata_pointer),
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&[offset],
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context.word_type().as_basic_type_enum(),
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"calldata_pointer_with_offset",
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);
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context
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.build_load(offset, "calldata_value")
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.and_then(|value| context.build_byte_swap(value))
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}
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/// Translates the calldata size.
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pub fn size<'ctx, D>(
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context: &mut Context<'ctx, D>,
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) -> anyhow::Result<inkwell::values::BasicValueEnum<'ctx>>
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where
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D: Dependency + Clone,
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{
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let value = context.get_global_value(crate::polkavm::GLOBAL_CALLDATA_SIZE)?;
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Ok(value)
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}
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/// Translates the calldata copy.
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pub fn copy<'ctx, D>(
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context: &mut Context<'ctx, D>,
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destination_offset: inkwell::values::IntValue<'ctx>,
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source_offset: inkwell::values::IntValue<'ctx>,
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size: inkwell::values::IntValue<'ctx>,
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) -> anyhow::Result<()>
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where
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D: Dependency + Clone,
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{
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let offset = context.safe_truncate_int_to_xlen(destination_offset)?;
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let size = context.safe_truncate_int_to_xlen(size)?;
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let destination = context.build_heap_gep(offset, size)?;
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let calldata_pointer = context
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.get_global(crate::polkavm::GLOBAL_CALLDATA_POINTER)?
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.value
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.as_pointer_value();
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let source = context.build_gep(
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Pointer::new(context.byte_type(), AddressSpace::Stack, calldata_pointer),
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&[context.safe_truncate_int_to_xlen(source_offset)?],
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context.byte_type(),
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"calldata_pointer_with_offset",
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);
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context.build_memcpy(
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context.intrinsics().memory_copy_from_generic,
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destination,
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source,
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size,
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"calldata_copy_memcpy_from_child",
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)
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}
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