An IPS, IPS32 or pchtxt file for main that writes main's .rodata, .data or .bss was refused as a whole. Such writes
need no lifting: tools/exefs_patches.py now puts them in build-cache/exefs.data, and runtime/mods.c stores them into
the loaded main before any game code runs, as emulators and Atmosphere apply a patch file to the module before its
dynamic linker runs. A DT_RELR word gets main's base added; bytes over words an explicit-addend relocation fills change
nothing and are dropped; a write into the dynamic linker's tables, a lazily bound function pointer or outside main's
image keeps the file unsupported. A mod whose data lines do not all fit the build keeps its code patches off too.
The mods are applied from the bottom one up (mods_exefs_apply), so where two mods write the same bytes the higher one
wins, as it does for files. --probe-mods checks it with two mods writing one byte.
The lifted code reads some of main's bytes at lift time (the jump tables). recomp/gen.py lists those ranges in
<gen>/main/folded.txt, and the setup checks the data writes against them after the lift: a file that writes them
becomes unsupported, since the change would not reach the generated code. Generated C without mods is unchanged.
This is the data part of #790 (ericdallo's ExeFS work), split out on its own; the plugin part follows separately.
Co-Authored-By: itaskaev2 <165683571+itaskaev2@users.noreply.github.com>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
HD texture packs made for the emulators ship their own HeapDef with TextureHeap and its parent grown for the
emulators' 8 GB memory option (HDPacks.com's 4K pack: by 3,419,000 KiB). Served as it is, the game asked for room the
application pool does not have and crashed at start (#673); without the file it looped the panic Blood Moon.
Before mem_init sizes the pool, resolution.c reads the HeapDef of every switched-on mod (mods.c mods_peek_romfs, which
lists the mods' RomFS roots without the rest of the scan: mods_scan needs paths main sets later) and counts the largest
TextureHeap growth over the shipped 506,880 KiB like TOTK_TEX_HEAP_EXTRA_MB (the larger of the two, at most 4 GiB). The
pool and the heap cap grow by it, and romfs.c heapdef_overlay serves the game's own table grown by that amount in the
mod's place, so the other heaps keep the sizes of the game version that runs.
Tested with the HDPacks.com 4K Texture Pack v1.0 as players install it, on 1.4.3 and 1.2.1 (RTX 4080 SUPER): the game
loads a save and runs at 60 fps with 0 validation errors, and holds 4.5 GB of game memory pools against 1.2 GB without
the pack. docs/mods.md, README.md and totk.ini.example say so; other packs come with no guarantee.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The game loads each member of a pack (Pack/**/*.pack.zs) as a resource of its own, in a heap sized by that member's
own entry in the resource size table. The port raised the entries of the mods' loose files only, so a mod that changed
a file inside a pack and shipped no table for it left the game's entry. A crash when heavy snow started in Hebra was
that: an .ainb member of about 13 KB loaded into a heap sized for the game's smaller copy, 0x48 bytes stayed free after
the file, the frame heap gave null for the 0x68-byte object the resource builds next, and main+0x21794c stored that
object's vtable at address 0.
restbl_overlay now unpacks each pack a mod serves and the game's copy of it with the dictionaries of
Pack/ZsDic.pack.zs, and raises each member's entry as it does a loose file's: by the growth for a member the game's
copy has, by the estimate of its type for one it lacks. It never lowers an entry, a mod's own table included, and the
log names the first members it raised. --probe-mods checks restbl_pack_raise on archives of its own, and docs/mods.md
says that the files inside packs count too.
🤖 Generated with [ECA](https://eca.dev) (nubank-anthropic/opus-5.5 - max)
Co-Authored-By: eca-agent <git@eca.dev>
Mods were described only in one dense list in the tester guide. docs/mods.md walks a player through installing a mod,
its order and switches, TKMM merges, code patches and their rebuild, what renaming a mod folder does, the reasons the
Mods tab gives for an unused mod, and what to check when something looks wrong. docs/cheats.md gains a folder example
and the rename note.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
