#include "../syscalls.h"
// === TYPES ===
-typedef int (*tSyscallHandler)(const char *Format, void *Args);
+typedef int (*tSyscallHandler)(const char *Format, void *Args, int *Sizes);
// === MACROS ===
-#define SYSCALL3(_name, _call, _fmtstr, _t1, _t2, _t3) int _name(const char *fmt,void*args){\
- _t1 a1;_t2 a2;_t3 a3;\
- if(strcmp(fmt,_fmtstr)!=0)return 0;\
- a1 = *(_t1*)args;args+=sizeof(_t1);\
- a2 = *(_t2*)args;args+=sizeof(_t2);\
- a3 = *(_t3*)args;args+=sizeof(_t3);\
- return _call(a1,a2,a3);\
+#define SYSCALL3(_name, _fmtstr, _t0, _t1, _t2, _call) int _name(const char*Fmt,void*Args,int*Sizes){\
+ _t0 a0;_t1 a1;_t2 a2;\
+ if(strcmp(Fmt,_fmtstr)!=0)return 0;\
+ a0 = *(_t0*)Args;Args+=sizeof(_t0);\
+ a1 = *(_t1*)Args;Args+=sizeof(_t1);\
+ a2 = *(_t2*)Args;Args+=sizeof(_t2);\
+ _call\
}
-#define SYSCALL2(_name, _call, _fmtstr, _t1, _t2) int _name(const char *fmt,void*args){\
- _t1 a1;_t2 a2;\
- if(strcmp(fmt,_fmtstr)!=0)return 0;\
- a1 = *(_t1*)args;args+=sizeof(_t1);\
- a2 = *(_t2*)args;args+=sizeof(_t2);\
- return _call(a1,a2);\
+#define SYSCALL2(_name, _fmtstr, _t0, _t1, _call) int _name(const char*Fmt,void*Args,int*Sizes){\
+ _t0 a0;_t1 a1;\
+ if(strcmp(Fmt,_fmtstr)!=0)return 0;\
+ a0 = *(_t0*)Args;Args+=sizeof(_t0);\
+ a1 = *(_t1*)Args;Args+=sizeof(_t1);\
+ _call;\
}
-#define SYSCALL1V(_name, _call, _fmtstr, _t1) int _name(const char *fmt, void*args){\
- _t1 a1;\
- if(strcmp(fmt,_fmtstr)!=0)return 0;\
- a1 = *(_t1*)args;args+=sizeof(_t1);\
- _call(a1);\
- return 0;\
+#define SYSCALL1(_name, _fmtstr, _t0, _call) int _name(const char*Fmt, void*Args,int*Sizes){\
+ _t0 a0;\
+ if(strcmp(Fmt,_fmtstr)!=0)return 0;\
+ a0 = *(_t0*)Args;Args+=sizeof(_t0);\
+ _call;\
}
// === CODE ===
-int Syscall_Null(const char *Format, void *Args)
+int Syscall_Null(const char *Format, void *Args, int *Sizes)
{
return 0;
}
-SYSCALL2(Syscall_Open, VFS_Open, "di", const char *, int);
-SYSCALL1V(Syscall_Close, VFS_Close, "i", int);
-SYSCALL3(Syscall_Read, VFS_Read, "iid", int, int, void *);
-SYSCALL3(Syscall_Write, VFS_Write, "iid", int, int, const void *);
+SYSCALL2(Syscall_Open, "si", const char *, int,
+ return VFS_Open(a0, a1|VFS_OPENFLAG_USER);
+);
+SYSCALL1(Syscall_Close, "i", int,
+ VFS_Close(a0);
+ return 0;
+);
+SYSCALL3(Syscall_Read, "iid", int, int, void *,
+ if( Sizes[2] <= a1 )
+ return -1;
+ return VFS_Read(a0, a1, a2);
+);
+SYSCALL3(Syscall_Write, "iid", int, int, const void *,
+ if( Sizes[2] <= a1 )
+ return -1;
+ return VFS_Write(a0, a1, a2);
+);
+SYSCALL3(Syscall_Seek, "iIi", int, int64_t, int,
+ return VFS_Seek(a0, a1, a2);
+);
+SYSCALL1(Syscall_Tell, "i", int,
+ return VFS_Tell(a0);
+);
+SYSCALL3(Syscall_IOCtl, "iid", int, int, void *,
+ return VFS_IOCtl(a0, a1, a2);
+);
+SYSCALL3(Syscall_FInfo, "idi", int, void *, int,
+ if( Sizes[1] < sizeof(tFInfo)+a2*sizeof(tVFS_ACL))
+ return -1;
+ return VFS_FInfo(a0, a1, a2);
+);
const tSyscallHandler caSyscalls[] = {
Syscall_Open,
Syscall_Close,
Syscall_Read,
- Syscall_Write
+ Syscall_Write,
+ Syscall_Seek,
+ Syscall_Tell,
+ Syscall_IOCtl,
+ Syscall_FInfo
};
const int ciNumSyscalls = sizeof(caSyscalls)/sizeof(caSyscalls[0]);
/**
* \brief Recieve a syscall structure from the server code
*/
-tRequestHeader *SyscallRecieve(tRequestHeader *Request)
+tRequestHeader *SyscallRecieve(tRequestHeader *Request, int *ReturnLength)
{
char formatString[Request->NParams+1];
- char *inData = (char*)&Request->Params[Request->NParams+Request->NReturn];
+ char *inData = (char*)&Request->Params[Request->NParams];
int argListLen = 0;
int i, retVal;
+ tRequestHeader *ret;
+ int retValueCount = 1;
+ int retDataLen = sizeof(Uint64);
+ void *returnData[Request->NParams];
+ int argSizes[Request->NParams];
- if( Request->CallID > ciNumSyscalls ) {
+ // Sanity check
+ if( Request->CallID >= ciNumSyscalls ) {
+ Log_Notice("Syscalls", "Unknown syscall number %i", Request->CallID);
return NULL;
}
// Get size of argument list
for( i = 0; i < Request->NParams; i ++ )
{
+ argSizes[i] = Request->Params[i].Length;
switch(Request->Params[i].Type)
{
case ARG_TYPE_VOID:
formatString[i] = 'd';
argListLen += sizeof(void*);
break;
+ case ARG_TYPE_STRING:
+ formatString[i] = 's';
+ argListLen += sizeof(char*);
+ break;
default:
return NULL; // ERROR!
}
}
+ formatString[i] = '\0';
+
+ Log_Debug("Syscalls", "Request %i '%s'", Request->CallID, formatString);
{
char argListData[argListLen];
// Build argument list
for( i = 0; i < Request->NParams; i ++ )
{
+ returnData[i] = NULL;
switch(Request->Params[i].Type)
{
case ARG_TYPE_VOID:
break;
case ARG_TYPE_INT32:
+ Log_Debug("Syscalls", "Arg %i: 0x%x", i, *(Uint32*)inData);
*(Uint32*)&argListData[argListLen] = *(Uint32*)inData;
argListLen += sizeof(Uint32);
inData += sizeof(Uint32);
break;
case ARG_TYPE_INT64:
+ Log_Debug("Syscalls", "Arg %i: 0x%llx", i, *(Uint64*)inData);
*(Uint64*)&argListData[argListLen] = *(Uint64*)inData;
argListLen += sizeof(Uint64);
inData += sizeof(Uint64);
break;
- case ARG_TYPE_DATA:
case ARG_TYPE_STRING:
- *(void**)&argListData[argListLen] = *(void**)inData;
+ Log_Debug("Syscalls", "Arg %i: '%s'", i, (char*)inData);
+ *(char**)&argListData[argListLen] = (char*)inData;
argListLen += sizeof(void*);
- inData += sizeof(void*);
+ inData += Request->Params[i].Length;
+ break;
+
+ // Data gets special handling, because only it can be returned to the user
+ // (ARG_TYPE_DATA is a pointer)
+ case ARG_TYPE_DATA:
+ // Prepare the return values
+ if( Request->Params[i].Flags & ARG_FLAG_RETURN )
+ {
+ retDataLen += Request->Params[i].Length;
+ retValueCount ++;
+ }
+
+ // Check for non-resident data
+ if( Request->Params[i].Flags & ARG_FLAG_ZEROED )
+ {
+ // Allocate and zero the buffer
+ returnData[i] = calloc(1, Request->Params[i].Length);
+ Log_Debug("Syscalls", "Arg %i: %i %p", i,
+ Request->Params[i].Length, returnData[i]);
+ *(void**)&argListData[argListLen] = returnData[i];
+ argListLen += sizeof(void*);
+ }
+ else
+ {
+ returnData[i] = (void*)inData;
+ Log_Debug("Syscalls", "Arg %i: %i %p", i,
+ Request->Params[i].Length, returnData[i]);
+ *(void**)&argListData[argListLen] = (void*)inData;
+ argListLen += sizeof(void*);
+ inData += Request->Params[i].Length;
+ }
break;
}
}
- retVal = caSyscalls[Request->CallID](formatString, argListData);
+ retVal = caSyscalls[Request->CallID](formatString, argListData, argSizes);
}
- return NULL;
+ // Allocate the return
+ ret = malloc(sizeof(tRequestHeader) + retValueCount * sizeof(tRequestValue)
+ + retDataLen);
+ ret->ClientID = Request->ClientID;
+ ret->CallID = Request->CallID;
+ ret->NParams = retValueCount;
+ inData = (char*)&ret->Params[ ret->NParams ];
+
+ // Static Uint64 return value
+ ret->Params[0].Type = ARG_TYPE_INT64;
+ ret->Params[0].Flags = 0;
+ ret->Params[0].Length = sizeof(Uint64);
+ *(Uint64*)inData = retVal;
+ inData += sizeof(Uint64);
+
+ Log_Debug("Syscalls", "Return 0x%llx", retVal);
+
+ for( i = 0; i < Request->NParams; i ++ )
+ {
+ if( Request->Params[i].Type != ARG_TYPE_DATA ) continue;
+ if( !(Request->Params[i].Flags & ARG_FLAG_RETURN) ) continue;
+
+ ret->Params[1 + i].Type = Request->Params[i].Type;
+ ret->Params[1 + i].Flags = 0;
+ ret->Params[1 + i].Length = Request->Params[i].Length;
+
+ memcpy(inData, returnData[i], Request->Params[i].Length);
+ inData += Request->Params[i].Length;
+
+ if( Request->Params[i].Flags & ARG_FLAG_ZEROED )
+ free( returnData[i] ); // Free temp buffer from above
+ }
+
+ *ReturnLength = sizeof(tRequestHeader)
+ + retValueCount * sizeof(tRequestValue)
+ + retDataLen;
+
+ return ret;
}
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