Chapter 25: Modules, Separate Compilation, and SSA Constructionlinear

Co-authored-by: Hsiang-Ying Fu <66062782+fuhsnn@users.noreply.github.com>
Co-authored-by: fuhsnn <66062782+fuhsnn@users.noreply.github.com>
Co-authored-by: Symious <14933944+symious@users.noreply.github.com>
Co-authored-by: Jun Kawasaki <jun784@gmail.com>
Co-authored-by: Claude Opus 5 <noreply@anthropic.com>

1 files changed, 0 insertions, 87 deletions

diff --git a/src/main/java/com/seaofnodes/simple/codegen/ElfExpr.java b/src/main/java/com/seaofnodes/simple/codegen/ElfExpr.java
deleted file mode 100644
index 9d9b8a1c..00000000
--- a/src/main/java/com/seaofnodes/simple/codegen/ElfExpr.java
+++ /dev/null
@@ -1,87 +0,0 @@
-package com.seaofnodes.simple.codegen;
-
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.nio.ByteBuffer;
-import java.nio.ByteOrder;
-
-public class ElfExpr {
-    public static void main(String[] args) {
-        try (FileOutputStream fos = new FileOutputStream("hello.o")) {
-            ByteBuffer buffer = ByteBuffer.allocate(512);
-            buffer.order(ByteOrder.LITTLE_ENDIAN);
-
-            // === ELF HEADER (64 bytes) ===
-            buffer.put(new byte[]{
-                    0x7F, 'E', 'L', 'F',  // ELF Magic
-                    2, 1, 1, 0,          // 64-bit, little-endian, version
-                    0, 0, 0, 0, 0, 0, 0,  // ABI padding
-                    2, 0,                // Type: Executable (ET_EXEC)
-                    0x3E, 0x00,          // Machine: x86-64
-                    1, 0, 0, 0,          // ELF version
-                    0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // Entry point
-                    0, 0, 0, 0, 0, 0, 0, 0,  // Program header offset
-                    64, 0, 0, 0, 0, 0, 0, 0,  // Section header offset
-                    0, 0, 0, 0,            // Flags
-                    64, 0,                 // ELF header size
-                    0, 0,                   // Program header entry size
-                    0, 0,                   // Number of program header entries
-                    40, 0,                  // Section header entry size
-                    2, 0,                   // Number of section headers
-                    1, 0                    // Section header string table index
-            });
-
-            // === .TEXT SECTION (Executable Code) ===
-            byte[] textSection = {
-                    // sys_write (write(1, message, 13))
-                    (byte) 0x48, (byte) 0xC7, (byte) 0xC0, 0x01, 0x00, 0x00, 0x00,  // mov rax, 1
-                    (byte) 0x48, (byte) 0xC7, (byte) 0xC7, 0x01, 0x00, 0x00, 0x00,  // mov rdi, 1
-                    (byte) 0x48, (byte) 0xBE, (byte)0x90, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // mov rsi, message
-                    (byte) 0x48, (byte) 0xC7, (byte) 0xC2, 0x0D, 0x00, 0x00, 0x00,  // mov rdx, 13
-                    (byte) 0x0F, (byte) 0x05,  // syscall
-
-                    // sys_exit (exit(0))
-                    (byte) 0x48, (byte) 0xC7, (byte) 0xC0, 0x3C, 0x00, 0x00, 0x00,  // mov rax, 60
-                    (byte) 0x48, (byte) 0x31, (byte) 0xFF,  // xor rdi, rdi
-                    (byte) 0x0F, (byte) 0x05   // syscall
-            };
-
-            // Append section data
-            buffer.position(256);
-            buffer.put(textSection);
-
-            // === STRING MESSAGE (.data Section) ===
-            byte[] message = "Hello, World!\n".getBytes();
-            buffer.position(400);
-            buffer.put(message);
-
-            // === SECTION HEADERS ===
-            buffer.position(64);
-
-            // Null Section (required as first entry)
-            buffer.put(new byte[40]);
-
-            // .text Section
-            buffer.putInt(1);    // Offset in section string table (".text")
-            buffer.putInt(1);    // Type: SHT_PROGBITS
-            buffer.putLong(6);   // Flags: Executable | Allocatable
-            buffer.putLong(0);   // Virtual address
-            buffer.putLong(256); // Offset to section data
-            buffer.putLong(textSection.length); // Section size
-            buffer.putInt(0);    // Link
-            buffer.putInt(0);    // Info
-            buffer.putLong(4);   // Address alignment
-            buffer.putLong(0);   // No extra entries
-
-            // === SECTION HEADER STRING TABLE ===
-            buffer.position(500);
-            buffer.put(".text".getBytes());
-            buffer.put((byte) 0x00);  // Null terminator
-
-            fos.write(buffer.array());
-            System.out.println("ELF object file 'hello.o' created.");
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
-    }
-}