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ship it

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This commit is contained in:
nora 2024-11-29 23:10:22 +01:00
parent 741b1000b3
commit b2d506b2ae
4 changed files with 23 additions and 7 deletions
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24
index.js
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@ -453,12 +453,14 @@ function lower(ast) {
const RELOCATIONS = {
R_X86_64_PC32: 2,
R_X86_64_PLT32: 4,
};
const SYMBOL_TYPES = {
STT_NOTYPE: 0,
STT_FUNC: 2,
};
const SYMBOL_BINDING = {
STB_LOCAL: 0,
STB_GLOBAL: 1,
};
const SYMBOL_VISIBILITY = {
@ -653,7 +655,7 @@ function lower(ast) {
// ; 64-bits in 64-bit mode
this.#append([0xe8]);
this.relocations.push({
kind: RELOCATIONS.R_X86_64_PC32,
kind: RELOCATIONS.R_X86_64_PC32, // pietro said i should use this even though PC_32 works too
symbol,
offset: this.out.length,
addend: -4,
@ -844,7 +846,17 @@ function lower(ast) {
};
}
const symbols = [];
const symbols = [
{
name: "",
type: SYMBOL_TYPES.STT_NOTYPE,
binding: SYMBOL_BINDING.STB_LOCAL,
visibility: SYMBOL_VISIBILITY.STV_DEFAULT,
sectionIndex: 0,
value: 0,
size: 0,
},
];
const {
textContent,
@ -1045,6 +1057,10 @@ function lower(ast) {
// symtab section
const strTableIndex = sectionCount + 1;
const firstGlobal = symbols.findIndex(
(sym) => sym.binding === SYMBOL_BINDING.STB_GLOBAL
);
assertDefined(firstGlobal);
writeSectionHeader(".symtab", {
type: /*SHT_SYMTAB*/ 2,
flags: 0,
@ -1052,7 +1068,7 @@ function lower(ast) {
offset: 0,
size: symtab.buffer.length,
link: strTableIndex,
info: 0,
info: firstGlobal,
addralign: 8,
entsize: 24,
});
@ -1159,7 +1175,7 @@ async function link(object) {
const outputFile = "output.o";
fs.writeFile(outputFile, object);
await execWithForwardedOutput("gcc", [outputFile]);
await execWithForwardedOutput("gcc", ["-Wl,-znoexecstack", outputFile]);
await execWithForwardedOutput("gdb", [
"--batch",
"--command",