gaia_assembler/backends/pe/
mod.rs

1//! PE (Portable Executable) backend compiler
2//! This backend generates .NET PE files containing IL code, not native machine code
3
4use super::{Backend, GeneratedFiles};
5use crate::{backends::msil::ClrBackend, config::GaiaConfig};
6use gaia_types::{
7    helpers::{AbiCompatible, ApiCompatible, Architecture, CompilationTarget},
8    *,
9};
10use std::collections::HashMap;
11use crate::program::GaiaProgram;
12
13/// PE Backend implementation
14#[derive(Default)]
15pub struct PeBackend {}
16
17impl Backend for PeBackend {
18    fn name(&self) -> &'static str {
19        "PE"
20    }
21
22    fn primary_target(&self) -> CompilationTarget {
23        CompilationTarget { build: Architecture::X86_64, host: AbiCompatible::PE, target: ApiCompatible::MicrosoftVisualC }
24    }
25
26    fn match_score(&self, target: &CompilationTarget) -> f32 {
27        match target.host {
28            AbiCompatible::PE => match target.build {
29                // dll, exe output, 10% support
30                Architecture::X86 => 10.0,
31                // dll, exe output, 10% support
32                Architecture::X86_64 => 10.0,
33                _ => -100.0,
34            },
35            _ => -100.0,
36        }
37    }
38
39    fn generate(&self, program: &GaiaProgram, _config: &GaiaConfig) -> Result<GeneratedFiles> {
40        let mut files = HashMap::new();
41        files.insert("main.dll".to_string(), compile(program)?);
42        Ok(GeneratedFiles { files, diagnostics: vec![] })
43    }
44}
45
46/// Compile Gaia program to .NET PE executable file
47pub fn compile(program: &GaiaProgram) -> Result<Vec<u8>> {
48    // Generate IL code using the IL backend
49    let il_code = ClrBackend::generate(program)?;
50
51    // Convert IL code to .NET PE format
52    // For now, we'll create a simple .NET PE wrapper around the IL code
53    generate_dotnet_pe_file(&il_code, &program.name)
54}
55
56/// Generate a .NET PE file containing the IL code
57fn generate_dotnet_pe_file(il_code: &[u8], program_name: &str) -> Result<Vec<u8>> {
58    // Create a minimal .NET PE file structure
59    // This is a simplified implementation that creates a basic .NET executable
60
61    // Convert IL bytecode to string for embedding in PE
62    let il_text = String::from_utf8_lossy(il_code);
63
64    // Create a minimal .NET PE file with the IL code
65    // For now, we'll create a simple wrapper that can be executed by the .NET runtime
66    let pe_content = create_minimal_dotnet_pe(&il_text, program_name)?;
67
68    Ok(pe_content)
69}
70
71/// Create a minimal .NET PE file structure
72fn create_minimal_dotnet_pe(il_code: &str, program_name: &str) -> Result<Vec<u8>> {
73    // This is a simplified implementation
74    // In a real implementation, we would need to create proper PE headers,
75    // metadata tables, and IL method bodies according to the CLI specification
76
77    // For now, we'll create a basic structure that includes the IL code
78    // and can be recognized as a .NET assembly
79
80    let mut pe_data = Vec::new();
81
82    // Add DOS header (simplified)
83    pe_data.extend_from_slice(b"MZ");
84    pe_data.resize(0x80, 0);
85
86    // Add PE signature
87    pe_data.extend_from_slice(b"PE\0\0");
88
89    // Add basic COFF header for .NET
90    pe_data.extend_from_slice(&[
91        0x4C, 0x01, // Machine: IMAGE_FILE_MACHINE_I386
92        0x03, 0x00, // NumberOfSections: 3
93        0x00, 0x00, 0x00, 0x00, // TimeDateStamp
94        0x00, 0x00, 0x00, 0x00, // PointerToSymbolTable
95        0x00, 0x00, 0x00, 0x00, // NumberOfSymbols
96        0xE0, 0x00, // SizeOfOptionalHeader
97        0x02, 0x01, // Characteristics: IMAGE_FILE_EXECUTABLE_IMAGE | IMAGE_FILE_32BIT_MACHINE
98    ]);
99
100    // Add optional header (simplified for .NET)
101    pe_data.extend_from_slice(&[
102        0x0B, 0x01, // Magic: PE32
103        0x0E, 0x00, // MajorLinkerVersion, MinorLinkerVersion
104    ]);
105
106    // Add more PE structure...
107    // This is a very simplified version. A complete implementation would need
108    // to properly construct all PE sections, metadata, and IL method bodies.
109
110    // For now, embed the IL code as a comment in the PE
111    let il_comment = format!("// IL Code for {}\n{}", program_name, il_code);
112    pe_data.extend_from_slice(il_comment.as_bytes());
113
114    // Pad to minimum size
115    pe_data.resize(1024, 0);
116
117    Ok(pe_data)
118}
gaia_assembler/backends/pe/mod.rs

gaia_assembler/backends/pe/
mod.rs
