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Kernel: Implement AML ToStringOp

This commit is contained in:
Bananymous 2024-12-18 01:44:33 +02:00
parent 7eb186dad4
commit 85e215650c
1 changed files with 38 additions and 0 deletions
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38
kernel/kernel/ACPI/AML/Node.cpp
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@ -1564,6 +1564,42 @@ namespace Kernel::ACPI::AML
return result;
}
static BAN::ErrorOr<Node> parse_to_string_op(ParseContext& context)
{
dprintln_if(AML_DUMP_FUNCTION_CALLS, "parse_to_string_op");
ASSERT(!context.aml_data.empty());
ASSERT(static_cast<AML::Byte>(context.aml_data[0]) == AML::Byte::ToStringOp);
context.aml_data = context.aml_data.slice(1);
auto source = TRY(convert_node(TRY(parse_node(context)), ConvBuffer, ONES));
auto length = TRY(convert_node(TRY(parse_node(context)), ConvInteger, sizeof(uint64_t))).as.integer.value;
if (source.as.str_buf->size < length)
length = source.as.str_buf->size;
for (size_t i = 0; i < length; i++)
{
if (source.as.str_buf->bytes[i] != 0x00)
continue;
length = i;
break;
}
Node result;
result.type = Node::Type::String;
result.as.str_buf = static_cast<Buffer*>(kmalloc(sizeof(Buffer) + length));
if (result.as.str_buf == nullptr)
return BAN::Error::from_errno(ENOMEM);
memcpy(result.as.str_buf->bytes, source.as.str_buf->bytes, length);
result.as.str_buf->size = length;
result.as.str_buf->ref_count = 1;
TRY(store_into_target(context, source));
return result;
}
static BAN::ErrorOr<void> parse_alias_op(ParseContext& context)
{
dprintln_if(AML_DUMP_FUNCTION_CALLS, "parse_alias_op");
@ -2626,6 +2662,8 @@ namespace Kernel::ACPI::AML
case AML::Byte::ToHexStringOp:
case AML::Byte::ToIntegerOp:
return TRY(parse_explicit_conversion(context));
case AML::Byte::ToStringOp:
return TRY(parse_to_string_op(context));
case AML::Byte::IncrementOp:
case AML::Byte::DecrementOp:
return TRY(parse_inc_dec_op(context));