mirror of
https://github.com/d0k3/GodMode9.git
synced 2025-06-26 13:42:47 +00:00
104 lines
4.2 KiB
C
104 lines
4.2 KiB
C
#include "virtual.h"
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#define VFLAG_ON_O3DS NAND_TYPE_O3DS
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#define VFLAG_ON_N3DS NAND_TYPE_N3DS
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#define VFLAG_ON_NO3DS NAND_TYPE_NO3DS
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#define VFLAG_ON_ALL (VFLAG_ON_O3DS | VFLAG_ON_N3DS | VFLAG_ON_NO3DS)
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#define VFLAG_NAND_SIZE (1<<30)
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#define VFLAG_ON_EMUNAND (1<<31)
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VirtualFile virtualFileTemplates[] = {
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{ "twln.bin" , 0x00012E00, 0x08FB5200, 0x03, VFLAG_ON_ALL },
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{ "twlp.bin" , 0x09011A00, 0x020B6600, 0x03, VFLAG_ON_ALL },
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{ "agbsave.bin" , 0x0B100000, 0x00030000, 0x07, VFLAG_ON_ALL },
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{ "firm0.bin" , 0x0B130000, 0x00400000, 0x06, VFLAG_ON_ALL },
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{ "firm1.bin" , 0x0B530000, 0x00400000, 0x06, VFLAG_ON_ALL },
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{ "ctrnand_fat.bin" , 0x0B95CA00, 0x2F3E3600, 0x04, VFLAG_ON_O3DS },
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{ "ctrnand_fat.bin" , 0x0B95AE00, 0x41D2D200, 0x05, VFLAG_ON_N3DS },
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{ "ctrnand_fat.bin" , 0x0B95AE00, 0x41D2D200, 0x04, VFLAG_ON_NO3DS },
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{ "ctrnand_full.bin" , 0x0B930000, 0x2F5D0000, 0x04, VFLAG_ON_O3DS },
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{ "ctrnand_full.bin" , 0x0B930000, 0x41ED0000, 0x05, VFLAG_ON_N3DS },
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{ "ctrnand_full.bin" , 0x0B930000, 0x41ED0000, 0x04, VFLAG_ON_NO3DS },
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{ "nand.bin" , 0x00000000, 0x00000000, 0xFF, VFLAG_ON_ALL | VFLAG_NAND_SIZE },
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{ "nand_minsize.bin" , 0x00000000, 0x3AF00000, 0xFF, VFLAG_ON_O3DS },
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{ "nand_minsize.bin" , 0x00000000, 0x4D800000, 0xFF, VFLAG_ON_N3DS | VFLAG_ON_NO3DS },
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{ "nand_hdr.bin" , 0x00000000, 0x00000200, 0xFF, VFLAG_ON_ALL },
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{ "sector0x96.bin" , 0x00012C00, 0x00000200, 0xFF, VFLAG_ON_ALL }
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};
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u32 IsVirtualPath(const char* path) {
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u32 plen = strnlen(path, 16);
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if (strncmp(path, "S:/", (plen >= 3) ? 3 : 2) == 0)
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return VRT_SYSNAND;
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else if (strncmp(path, "E:/", (plen >= 3) ? 3 : 2) == 0)
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return VRT_EMUNAND;
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return 0;
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}
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bool CheckVirtualPath(const char* path) {
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u32 vp_nand = IsVirtualPath(path);
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if (vp_nand == VRT_SYSNAND) {
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return true; // this is safe because we re-check for slot0x05 crypto
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} else if (vp_nand == VRT_EMUNAND) {
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return GetNandSizeSectors(true);
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}
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return false;
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}
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bool FindVirtualFile(VirtualFile* vfile, const char* path)
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{
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char* fname = strchr(path, '/');
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bool on_emunand = false;
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u8 nand_type = 0;
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// fix the name
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if (!fname) return false;
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fname++;
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// check path vailidity
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if (!IsVirtualPath(path) || (fname - path != 3))
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return false;
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// check NAND type
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on_emunand = (IsVirtualPath(path) == VRT_EMUNAND);
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nand_type = CheckNandType(on_emunand);
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// parse the template list, get the correct one
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u32 n_templates = sizeof(virtualFileTemplates) / sizeof(VirtualFile);
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VirtualFile* curr_template = NULL;
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for (u32 i = 0; i < n_templates; i++) {
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curr_template = &virtualFileTemplates[i];
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if ((curr_template->flags & nand_type) && (strncmp(fname, curr_template->name, 32) == 0))
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break;
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curr_template = NULL;
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}
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if (!curr_template) return false;
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// copy current template to vfile
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memcpy(vfile, curr_template, sizeof(VirtualFile));
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// process special flags
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if ((vfile->keyslot == 0x05) && !CheckSlot0x05Crypto())
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return false; // keyslot 0x05 not properly set up
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if (vfile->flags & VFLAG_NAND_SIZE) {
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if (on_emunand && (GetNandSizeSectors(false) != GetNandSizeSectors(true)))
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return false; // EmuNAND is too small
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vfile->size = GetNandSizeSectors(false) * 0x200;
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}
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if (on_emunand) vfile->flags |= VFLAG_ON_EMUNAND;
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return true;
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}
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int ReadVirtualFile(const VirtualFile* vfile, u8* buffer, u32 offset, u32 count)
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{
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// simple wrapper function for ReadNandSectors(u8* buffer, u32 sector, u32 count, u32 keyslot, bool read_emunand)
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return ReadNandSectors(buffer, (vfile->offset + offset) / 0x200, (count+0x1FF) / 0x200, vfile->keyslot, vfile->flags & VFLAG_ON_EMUNAND);
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}
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int WriteVirtualFile(const VirtualFile* vfile, const u8* buffer, u32 offset, u32 count)
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{
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// simple wrapper function for WriteNandSectors(const u8* buffer, u32 sector, u32 count, u32 keyslot, bool write_emunand)
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return WriteNandSectors(buffer, (vfile->offset + offset) / 0x200, (count+0x1FF) / 0x200, vfile->keyslot, vfile->flags & VFLAG_ON_EMUNAND);
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}
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