init
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1c3935d040
4 changed files with 91 additions and 0 deletions
24
LICENSE
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24
LICENSE
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MIT License
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Copyright (c) 2022 sup39
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation
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files (the "Software"), to deal in the Software without
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restriction, including without limitation the rights to use,
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copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following
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conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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7
README.md
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7
README.md
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# Read File
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Read file from memory card in SMS without allocating memory or modifying game id
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## TODO
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- [ ] Add error message
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- [ ] Handle inserting/removing memory card
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- [ ] Make sure there is no side effect
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56
ReadFile.c
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56
ReadFile.c
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typedef struct {
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char pad[20];
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} CARDFileInfo;
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typedef struct {
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int slot;
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} TCardManager;
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/** For NTSC-J 1.0:
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*
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* mount_ 80107b50
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* open_ 801072f4
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* CARDOpen 800a3cac
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* CARDRead 800a4640
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* CARDClose 800a3e24
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*
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* onReadOptionBlock 801069f4
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*/
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typedef int bool;
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int mount_(TCardManager *this, bool);
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int open_(TCardManager *this, CARDFileInfo*);
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int CARDOpen(int slot, const char *fileName, CARDFileInfo*);
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int CARDRead(CARDFileInfo *fileInfo, void *buf, unsigned long size, unsigned long offset);
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int CARDClose(CARDFileInfo *fileInfo);
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#define fileName "gct"
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#define dst ((void*)0x817F0000)
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#define size 0xE000 // 7 blocks
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int onReadOptionBlock(TCardManager *this, CARDFileInfo *fileInfo) {
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int rc;
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// mount
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if ((rc = mount_(this, 1))) goto orig;
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// open file
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if ((rc = CARDOpen(this->slot, fileName, fileInfo))) {
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// TODO error handling
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// if (rc == -4) // file not exists
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goto orig;
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}
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// read file to memory
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if ((rc = CARDRead(fileInfo, dst, size, 0))) {
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// should not fail if (dst, size) is properly set
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} else {
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// everything is good
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// TODO apply gecko code
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*(char*)0x817effff = 1; // ready (temporary solution)
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}
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// close file
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CARDClose(fileInfo);
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orig:
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// original function call
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return open_(this, fileInfo);
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}
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4
ReadFile.ld
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4
ReadFile.ld
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$$ = 0x817eff00;
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/* TCardManager::cmdLoop() */
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$bl$onReadOptionBlock = 0x801069f4;
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