1 files changed, 21 insertions(+), 24 deletions(-)

M elf.zig

@@ 6,46 6,43 @@ pub fn main() !void {
     const writer = file.writer();
     try writeElfHeader(writer);
 
-    // addr 0x40: 1st program header entry
+    // 64: 1st program header entry
     // segment type: loadable
     try writer.writeIntNative(u32, 1);
     // strange flags
     try writer.writeIntNative(u32, 4);
     // offset of the segment in file image
-    try writer.writeIntNative(u64, 0x0);
+    try writer.writeIntNative(u64, 0);
     // virtual addr of segment in memory
     try writer.writeIntNative(u64, 0x400000);
     // physical addr
     try writer.writeIntNative(u64, 0x400000);
     // size of segment in file image
-    try writer.writeIntNative(u64, 428);
+    try writer.writeIntNative(u64, 260);
     // size of segment in memory
-    try writer.writeIntNative(u64, 428);
+    try writer.writeIntNative(u64, 260);
     // alignment
-    try writer.writeIntNative(u64, 4096);
+    try writer.writeIntNative(u64, 8);
 
-    // addr 0x78: 2nd program header entry. this is the instructions and the message.
+    // 120: 2nd program header entry. this is the instructions and the message.
     // segment type: loadable
     try writer.writeIntNative(u32, 1);
     // strange flags
     try writer.writeIntNative(u32, 5);
     // offset of the segment in file image
-    try writer.writeIntNative(u64, 0x1000);
+    try writer.writeIntNative(u64, 176);
     // virtual addr of segment in memory
-    try writer.writeIntNative(u64, 0x401000);
+    try writer.writeIntNative(u64, 0x4000b0);
     // physical addr
-    try writer.writeIntNative(u64, 0x401000);
+    try writer.writeIntNative(u64, 0x4000b0);
     // size of segment in file image
     try writer.writeIntNative(u64, 29);
     // size of segment in memory
     try writer.writeIntNative(u64, 29);
     // alignment
-    try writer.writeIntNative(u64, 4096);
-
-    // useless filler
-    try writer.writeByteNTimes(0, 3920);
+    try writer.writeIntNative(u64, 8);
 
-    // addr: 0x1000: exe
+    // 176: exe
     // mov 60 to rax
     try writer.writeAll("\x48\xc7" ++ "\xc0" ++ "\x3c\x00\x00\x00");
     // mov 6 to rdi


@@ 55,11 52,11 @@ pub fn main() !void {
     // string
     try writer.writeAll("Hello, world\n");
 
-    // addr 0x101d: strtab
+    // 205: strtab
     // zero it for now.
     try writer.writeByteNTimes(0, 59);
 
-    // addr 0x1058: 1st section header
+    // 264: 1st section header
     // name offset
     try writer.writeIntNative(u32, 49);
     // type: instructions


@@ 67,11 64,11 @@ pub fn main() !void {
     // flags
     try writer.writeIntNative(u64, 6);
     // virtual addr
-    try writer.writeIntNative(u64, 0x401000);
+    try writer.writeIntNative(u64, 0x4000b0);
     // offset of the section content in file
-    try writer.writeIntNative(u64, 0x1000);
+    try writer.writeIntNative(u64, 176);
     // size
-    try writer.writeIntNative(u64, 0x1d);
+    try writer.writeIntNative(u64, 29);
     // link: section index of an association section (prob irrelevant)
     try writer.writeIntNative(u32, 0);
     // extra info


@@ 81,7 78,7 @@ pub fn main() !void {
     // section content entry size (unused)
     try writer.writeIntNative(u64, 0);
 
-    // addr 0x1098: 2nd section header
+    // 328: 2nd section header
     // name offset
     try writer.writeIntNative(u32, 1);
     // type: strtab


@@ 91,9 88,9 @@ pub fn main() !void {
     // virtual addr
     try writer.writeIntNative(u64, 0);
     // offset of the section content in file
-    try writer.writeIntNative(u64, 0x101d);
+    try writer.writeIntNative(u64, 205);
     // size
-    try writer.writeIntNative(u64, 37);
+    try writer.writeIntNative(u64, 59);
     // link: section index of an association section (prob irrelevant)
     try writer.writeIntNative(u32, 0);
     // extra info


@@ 126,11 123,11 @@ pub fn writeElfHeader(writer: anytype) !void {
     // another elf version field?
     try writer.writeIntNative(u32, 1);
     // entrypoint addr
-    try writer.writeIntNative(u64, 0x401000);
+    try writer.writeIntNative(u64, 0x4000b0);
     // start of program header
     try writer.writeIntNative(u64, 64);
     // start of section header
-    try writer.writeIntNative(u64, 0x1058);
+    try writer.writeIntNative(u64, 264);
     // flags
     try writer.writeIntNative(u32, 0);
     // size of elf header