89 lines
2.6 KiB
C
89 lines
2.6 KiB
C
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/*
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processes.c
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(c) TuxSH, 2017
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This is part of 3ds_sm, which is licensed under the MIT license (see LICENSE for details).
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*/
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#include "list.h"
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#include "processes.h"
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#include "services.h"
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ProcessDataList processDataInUseList = { NULL, NULL }, freeProcessDataList = { NULL, NULL };
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char (*serviceAccessListBuffers)[34][8];
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// The kernel limits the number of processes to 47 anyways...
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static u64 freeServiceAccessListBuffersIds = (1ULL << 59) - 1;
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ProcessData *findProcessData(u32 pid)
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{
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for(ProcessData *node = processDataInUseList.first; node != NULL; node = node->next)
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{
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if(node->pid == pid)
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return node;
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}
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return NULL;
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}
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ProcessData *doRegisterProcess(u32 pid, char (*serviceAccessList)[8], u32 serviceAccessListSize)
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{
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ProcessData *processData = (ProcessData *)allocateNode(&processDataInUseList, &freeProcessDataList, sizeof(ProcessData), false);
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if(serviceAccessListSize != 0)
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{
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s32 bufferId = 63 - __builtin_clzll(freeServiceAccessListBuffersIds);
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if(bufferId == -1)
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panic();
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else
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{
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freeServiceAccessListBuffersIds &= ~(1ULL << bufferId);
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processData->serviceAccessList = serviceAccessListBuffers[bufferId];
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processData->serviceAccessListSize = serviceAccessListSize;
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memcpy(processData->serviceAccessList, serviceAccessList, serviceAccessListSize);
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}
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}
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assertSuccess(svcCreateSemaphore(&processData->notificationSemaphore, 0, 0x10));
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processData->pid = pid;
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return processData;
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}
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Result RegisterProcess(u32 pid, char (*serviceAccessList)[8], u32 serviceAccessListSize)
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{
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serviceAccessListSize = serviceAccessListSize - (serviceAccessListSize % 8);
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if(findProcessData(pid) != NULL)
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return 0xD9006403;
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else if(serviceAccessListSize > 8 * (IS_PRE_93 ? 32 : 34))
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return 0xD9006405;
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else
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{
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doRegisterProcess(pid, serviceAccessList, serviceAccessListSize);
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return 0;
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}
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}
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Result UnregisterProcess(u32 pid)
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{
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ProcessData *processData = findProcessData(pid);
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if(processData == NULL)
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return 0xD8806404;
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svcCloseHandle(processData->notificationSemaphore);
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// Unregister the services registered by the process
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for(u32 i = 0; i < nbServices; i++)
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{
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if(servicesInfo[i].pid == pid)
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{
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svcCloseHandle(servicesInfo[i].clientPort);
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servicesInfo[i] = servicesInfo[--nbServices];
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}
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}
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freeServiceAccessListBuffersIds |= 1ULL << (u32)((processData->serviceAccessList - serviceAccessListBuffers[0]) / 34);
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moveNode(processData, &freeProcessDataList, false);
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return 0;
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}
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