110 lines
2.5 KiB
C
110 lines
2.5 KiB
C
#include <3ds.h>
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#include "fsldr.h"
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#include "fsreg.h"
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#include "srvsys.h"
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#define SDK_VERSION 0x70200C8
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static Handle fsldrHandle;
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static int fsldrRefCount;
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// MAKE SURE fsreg has been init before calling this
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static Result fsldrPatchPermissions(void)
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{
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u32 pid;
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Result res;
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FS_ProgramInfo info;
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u32 storage[8] = {0};
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storage[6] = 0x680; // SDMC access and NAND access flag
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info.programId = 0x0004013000001302LL; // loader PID
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info.mediaType = MEDIATYPE_NAND;
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res = svcGetProcessId(&pid, 0xFFFF8001);
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if (R_SUCCEEDED(res))
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{
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res = FSREG_Register(pid, 0xFFFF000000000000LL, &info, (u8 *)storage);
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}
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return res;
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}
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Result fsldrInit(void)
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{
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Result ret = 0;
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if (AtomicPostIncrement(&fsldrRefCount)) return 0;
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ret = srvSysGetServiceHandle(&fsldrHandle, "fs:LDR");
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if (R_SUCCEEDED(ret))
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{
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fsldrPatchPermissions();
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ret = FSLDR_InitializeWithSdkVersion(fsldrHandle, SDK_VERSION);
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ret = FSLDR_SetPriority(0);
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if (R_FAILED(ret)) svcBreak(USERBREAK_ASSERT);
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}
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else
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{
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AtomicDecrement(&fsldrRefCount);
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}
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return ret;
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}
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void fsldrExit(void)
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{
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if (AtomicDecrement(&fsldrRefCount)) return;
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svcCloseHandle(fsldrHandle);
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}
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Result FSLDR_InitializeWithSdkVersion(Handle session, u32 version)
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{
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u32 *cmdbuf = getThreadCommandBuffer();
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cmdbuf[0] = IPC_MakeHeader(0x861,1,2); // 0x8610042
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cmdbuf[1] = version;
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cmdbuf[2] = 32;
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Result ret = 0;
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if(R_FAILED(ret = svcSendSyncRequest(session))) return ret;
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return cmdbuf[1];
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}
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Result FSLDR_SetPriority(u32 priority)
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{
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u32 *cmdbuf = getThreadCommandBuffer();
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cmdbuf[0] = IPC_MakeHeader(0x862,1,0); // 0x8620040
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cmdbuf[1] = priority;
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Result ret = 0;
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if(R_FAILED(ret = svcSendSyncRequest(fsldrHandle))) return ret;
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return cmdbuf[1];
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}
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Result FSLDR_OpenFileDirectly(Handle* out, FS_ArchiveID archiveId, FS_Path archivePath, FS_Path filePath, u32 openFlags, u32 attributes)
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{
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u32 *cmdbuf = getThreadCommandBuffer();
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cmdbuf[0] = IPC_MakeHeader(0x803,8,4); // 0x8030204
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cmdbuf[1] = 0;
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cmdbuf[2] = archiveId;
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cmdbuf[3] = archivePath.type;
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cmdbuf[4] = archivePath.size;
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cmdbuf[5] = filePath.type;
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cmdbuf[6] = filePath.size;
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cmdbuf[7] = openFlags;
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cmdbuf[8] = attributes;
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cmdbuf[9] = IPC_Desc_StaticBuffer(archivePath.size, 2);
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cmdbuf[10] = (u32)archivePath.data;
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cmdbuf[11] = IPC_Desc_StaticBuffer(filePath.size, 0);
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cmdbuf[12] = (u32)filePath.data;
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Result ret = 0;
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if(R_FAILED(ret = svcSendSyncRequest(fsldrHandle))) return ret;
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if(out) *out = cmdbuf[3];
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return cmdbuf[1];
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}
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