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Rewrite .zip.o file linker

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This change takes an entirely new approach to the incremental linking of
pkzip executables. The assets created by zipobj.com are now treated like
debug data. After a .com.dbg is compiled, fixupobj.com should be run, so
it can apply fixups to the offsets and move the zip directory to the end
of the file. Since debug data doesn't get objcopy'd, a new tool has been
introduced called zipcopy.com which should be run after objcopy whenever
a .com file is created. This is all automated by the `cosmocc` toolchain
which is rapidly becoming the new recommended approach.

This change also introduces the new C23 checked arithmetic macros.
This commit is contained in:
Justine Tunney 2023-06-10 09:15:19 -07:00
parent f6407d5f7c
commit 8ff48201ca
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GPG key ID: BE714B4575D6E328
125 changed files with 1056 additions and 928 deletions
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19
libc/intrin/ftrapv.c
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@ -18,6 +18,7 @@
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/limits.h"
#include "libc/runtime/internal.h"
#include "libc/stdckdint.h"
/**
* Returns -𝑥, aborting on overflow.
@ -66,7 +67,7 @@ int128_t __negvti2(int128_t x) {
*/
int __addvsi3(int x, int y) {
int z;
if (__builtin_add_overflow(x, y, &z)) {
if (ckd_add(&z, x, y)) {
__on_arithmetic_overflow();
}
return z;
@ -80,7 +81,7 @@ int __addvsi3(int x, int y) {
*/
long __addvdi3(long x, long y) {
long z;
if (__builtin_add_overflow(x, y, &z)) {
if (ckd_add(&z, x, y)) {
__on_arithmetic_overflow();
}
return z;
@ -94,7 +95,7 @@ long __addvdi3(long x, long y) {
*/
int128_t __addvti3(int128_t x, int128_t y) {
int128_t z;
if (__builtin_add_overflow(x, y, &z)) {
if (ckd_add(&z, x, y)) {
__on_arithmetic_overflow();
}
return z;
@ -108,7 +109,7 @@ int128_t __addvti3(int128_t x, int128_t y) {
*/
int __subvsi3(int x, int y) {
int z;
if (__builtin_sub_overflow(x, y, &z)) {
if (ckd_sub(&z, x, y)) {
__on_arithmetic_overflow();
}
return z;
@ -122,7 +123,7 @@ int __subvsi3(int x, int y) {
*/
long __subvdi3(long x, long y) {
long z;
if (__builtin_sub_overflow(x, y, &z)) {
if (ckd_sub(&z, x, y)) {
__on_arithmetic_overflow();
}
return z;
@ -136,7 +137,7 @@ long __subvdi3(long x, long y) {
*/
int128_t __subvti3(int128_t x, int128_t y) {
int128_t z;
if (__builtin_sub_overflow(x, y, &z)) {
if (ckd_sub(&z, x, y)) {
__on_arithmetic_overflow();
}
return z;
@ -150,7 +151,7 @@ int128_t __subvti3(int128_t x, int128_t y) {
*/
int __mulvsi3(int x, int y) {
int z;
if (__builtin_mul_overflow(x, y, &z)) {
if (ckd_mul(&z, x, y)) {
__on_arithmetic_overflow();
}
return z;
@ -164,7 +165,7 @@ int __mulvsi3(int x, int y) {
*/
long __mulvdi3(long x, long y) {
long z;
if (__builtin_mul_overflow(x, y, &z)) {
if (ckd_mul(&z, x, y)) {
__on_arithmetic_overflow();
}
return z;
@ -178,7 +179,7 @@ long __mulvdi3(long x, long y) {
*/
int128_t __mulvti3(int128_t x, int128_t y) {
int128_t z;
if (__builtin_mul_overflow(x, y, &z)) {
if (ckd_mul(&z, x, y)) {
__on_arithmetic_overflow();
}
return z;