mirror of
https://gitlab.com/banjo.decomp/banjo-kazooie
synced 2026-07-11 22:00:09 -04:00
Mario
116 lines
5.3 KiB
C
116 lines
5.3 KiB
C
#ifndef BANJO_KAZOOIE_CHECKSUMS_H
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#define BANJO_KAZOOIE_CHECKSUMS_H
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#include <ultra64.h>
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/* The checksums for the boot and core1 segments are stored right after the boot segment in ROM
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*/
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#define CRC_BOOT_TEXT_CHECKSUM1 0
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#define CRC_BOOT_TEXT_CHECKSUM2 4
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#define CRC_CORE1_TEXT_CHECKSUM1 8
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#define CRC_CORE1_TEXT_CHECKSUM2 12
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#define CRC_CORE1_DATA_CHECKSUM1 16
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#define CRC_CORE1_DATA_CHECKSUM2 20
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extern u8 crc_ROM_START[];
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/* Each overlay bss section contains four checksum values, calculated from the rarezip decompressor.
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* These values are written by the overlay loader. They are checked with pre-calculated values for
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* different anti-tampering measurements.
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* The exception is the core1 overlay, which checksums are written to a special place.
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*/
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struct overlay_checksums_s {
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s32 text_checksum1;
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s32 text_checksum2;
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s32 data_checksum1;
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s32 data_checksum2;
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};
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extern struct overlay_checksums_s gChecksumsCore1;
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extern struct overlay_checksums_s gChecksumsCore2;
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extern struct overlay_checksums_s gChecksumsCC; // (unused) no anti tampering measurements
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extern struct overlay_checksums_s gChecksumsGV; // (unused) no anti tampering measurements
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extern struct overlay_checksums_s gChecksumsMMM; // (unused) no anti tampering measurements
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extern struct overlay_checksums_s gChecksumsTTC;
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extern struct overlay_checksums_s gChecksumsMM; // (unused) no anti tampering measurements
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extern struct overlay_checksums_s gChecksumsBGS; // (unused) no anti tampering measurements
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extern struct overlay_checksums_s gChecksumsRBB; // (unused) no anti tampering measurements
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extern struct overlay_checksums_s gChecksumsFP; // (unused) no anti tampering measurements
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extern struct overlay_checksums_s gChecksumsSM;
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extern struct overlay_checksums_s gChecksumsCutscenes; // (unused) no anti tampering measurements
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extern struct overlay_checksums_s gChecksumsLair; // (unused) no anti tampering measurements
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extern struct overlay_checksums_s gChecksumsFight; // (unused) no anti tampering measurements
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extern struct overlay_checksums_s gChecksumsCCW; // (unused) no anti tampering measurements
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extern struct overlay_checksums_s gChecksumsEmptyLvl; // (unused) no anti tampering measurements
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/* The pre-calculated checksums are located in random places.
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*
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* The calculation process should be as following (needs to be confirmed!!):
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* 1. At compile time all checksum variables (listed below) are set to zero
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* 2. The text checksums for all overlays (except core1) are calculated and written.
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* 3. The data checksums are calculated in two passes:
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* 3-1. Data checksum 1 is calculated and written for each overlay (except core1).
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* 3-2. Data checksum 2 is calculated and written for each overlay (except core1).
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* 4. The boot and core1 checksums are calculated and written to the CRC section.
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*
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* Notes:
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* - Checksums 1 sums up every byte
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* - Checksum 2 XORes every byte after it is shifted right by "current checksum 1 AND 0x17"
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* (This means checksum 2 must be calculated together with checksum 1)
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* (Step 3-1 discards checksum 2 and step 3-2 discards checksum 1)
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* - Checksums without a correspondending variable are just discarded.
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*/
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extern s32 D_803727F4; // core2 text checksum 2 (location: core2)
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extern s32 D_80276574; // core2 data checksum 2 (location: core1)
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extern s32 D_80389BE0; // CC text checksum 1 (location: CC)
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extern s32 D_80389BE4; // CC text checksum 2 (location: CC)
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extern s32 D_80389BE8; // CC data checksum 1 (location: CC)
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extern s32 D_80276570; // CC data checksum 2 (location: core1)
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extern s32 D_80390F30; // GV text checksum 1 (location: GV)
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extern s32 D_80390F34; // GV text checksum 2 (location: GV)
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extern s32 D_80390F38; // GV data checksum 1 (location: GV)
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extern s32 D_80275904; // GV data checksum 2 (location: core1)
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extern s32 D_8038C300; // MMM text checksum 1 (location: MMM)
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extern s32 D_8038C304; // MMM text checksum 2 (location: MMM)
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extern s32 D_8038C308; // MMM data checksum 1 (location: MMM)
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extern s32 D_80275854; // MMM data checksum 2 (location: core1)
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extern s32 D_8038C750; // TTC text checksum 1 (location: TTC)
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extern s32 D_8038C754; // TTC text checksum 2 (location: TTC)
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extern s32 D_8038C758; // TTC data checksum 1 (location: TTC)
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extern s32 D_80276CB0; // TTC data checksum 2 (location: core1)
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extern s32 D_803899C0; // MM text checksum 1 (location: MM)
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extern s32 D_803899C4; // MM text checksum 2 (location: MM)
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extern s32 D_803899C8; // MM data checksum 1 (location: MM)
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extern s32 D_80275654; // MM data checksum 2 (location: core1)
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extern s32 D_80390B20; // BGS text checksum 1 (location: BGS)
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extern s32 D_80390B24; // BGS text checksum 2 (location: BGS)
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extern s32 D_80390B28; // BGS data checksum 1 (location: BGS)
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extern s32 D_802758F0; // BGS data checksum 2 (location: core1)
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extern s32 D_80276CB4; // RBB data checksum 2 (location: core1)
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extern s32 D_802758F4; // FP data checksum 2 (location: core1)
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extern s32 D_8038AAE0; // SM text checksum 1 (location: SM)
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extern s32 D_8038AAE4; // SM text checksum 2 (location: SM)
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extern s32 D_8038AAE8; // SM data checksum 1 (location: SM)
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extern s32 D_80275650; // SM data checksum 2 (location: core1)
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extern s32 D_80275850; // Cutscenes data checksum 2 (location: core1)
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extern s32 D_80275900; // Lair data checksum 2 (location: core1)
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extern s32 D_80275D34; // Fight data checksum 2 (location: core1)
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extern s32 D_80275D30; // CCW data checksum 2 (location: core1)
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#endif
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