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toolchain: banner purge + WHY-only comment sweep (rule 8)

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selfhost/, cmd/, internal/ join the tree-wide sweep: every section
banner dies (91 selfhost + the cmd C-style dividers -> 0); narration
and stale contracts deleted (pre-#22 bundler notes, retired
single-PT_LOAD and no-archive claims, superseded ABI tables); every
ref/harec/qbe cite, task cite, encoding/ELF contract, and rule-10
twin pointer kept; lost lifetime/rationale lines restored where the
sweep over-cut (elf_globals ownership, kwtab linear-scan). Comment-
only proven: all five wwstage tool binaries byte-identical across
the sweep; test-commit, test-byteid (161+1399, 0 pinned-divergent),
and test-bootstrap (fixed point + 991-995 byte-id) all exit 0.
The read-through banked 66 latent-bug leads (checkpoint).
This commit is contained in:
Hojun-Cho
2026-08-08 23:14:03 +09:00
parent 83f5956df2
commit 62b9d20383
60 changed files with 232 additions and 1045 deletions
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17
cmd/w6l/pass.c
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@@ -1,14 +1,3 @@
/*
* pass.c — resolution + relocation. After all objects are loaded:
*
* l_resolve : check that every symbol referenced by a relocation
* is defined somewhere. Errors get logged.
* l_relocate: with the final virtual base address known, walk the
* relocation list and patch the .text bytes in place.
*
* Supported relocation kinds: PC32 (2), PLT32 (4). Both are PC-relative
* 32-bit displacements; for static linking PLT32 collapses to PC32.
*/
#include "l.h"
#include <stdio.h>
#include <string.h>
@@ -34,7 +23,7 @@ l_resolve(Lnk *l)
* across runs (rels are pushed onto the head as objects load). */
for (Lrel *r = l->rels; r; r = r->next) {
if (r->sym == NULL || r->sym->defined) continue;
if (r->sym->is_dyn) continue; /* already promoted */
if (r->sym->is_dyn) continue;
for (Lso *so = l->sos; so; so = so->next) {
const char *ver = NULL;
if (l_so_provides_v(so, r->sym->name, &ver)) {
@@ -47,7 +36,6 @@ l_resolve(Lnk *l)
}
}
/* What remains undefined truly is undefined. */
for (Lrel *r = l->rels; r; r = r->next) {
if (r->sym == NULL) continue;
if (!r->sym->defined && !r->sym->is_dyn) {
@@ -90,7 +78,8 @@ l_relocate(Lnk *l, u64 text_va, u64 data_va)
switch (r->kind) {
case R_X86_64_PC32:
case R_X86_64_PLT32: {
/* PC-relative 32-bit displacement; lands in .text. */
/* PC-relative 32-bit displacement; lands in .text.
* For static linking PLT32 collapses to PC32. */
u64 site = text_va + r->off;
i64 rel = (i64)sym_va - (i64)site + r->addend;
patch_u32(l->text + r->off, (u32)(i32)rel);