phase 5

2026-06-12 19:55:35 +00:00
parent 80285b7fb4
commit 961df2d542
31 changed files with 2681 additions and 7 deletions
@@ -125,6 +125,15 @@ addresses read from core's exported data-symbol globals) → instantiate →
 patch deferred GOT entries → `__wasm_apply_data_relocs` → `__wasm_call_ctors`
 → call the entry export.

+- **Erratum (found in Phase 3): self-resolved `GOT.mem` values must add
+  `__memory_base`.** A PIC module's exported data symbols are i32 globals
+  holding offsets *relative to its `__memory_base`*, not absolute addresses —
+  the linker adds the base when patching deferred GOT entries (there is no
+  `__wasm_apply_global_relocs` export to do it). Copying the export verbatim
+  reads/writes core memory at low addresses and renders silently wrong values;
+  the Phase 3 fixture's `self-got`/`callback` markers exist to catch exactly
+  this. `GOT.mem` entries resolved from the *core's* exports are absolute
+  already (the core is non-PIC) and need no adjustment.
 - **GOT.func is resolved guest-side**: the core exports a helper returning
  `(intptr_t)&func` — taking the address forces a link-time elem entry and a
  wasm function pointer *is* its table index. No host-side funcref injection