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More return struct fixes. Add Vector and Vector * return support. Change vfunc_call to use template. Update makefile

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This commit is contained in:
Dr!fter 2013-08-28 14:20:20 -04:00
parent e07e2286cb
commit c5b8d2fecb
7 changed files with 406 additions and 22 deletions
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2
Makefile
View File

@ -24,7 +24,7 @@ PROJECT = dhooks
#Uncomment for Metamod: Source enabled extension
USEMETA = true
OBJECTS = sdk/smsdk_ext.cpp extension.cpp vhook.cpp $(SMSDK)/public/jit/x86/assembler-x86.cpp listeners.cpp natives.cpp vfunc_call.cpp
OBJECTS = sdk/smsdk_ext.cpp extension.cpp vhook.cpp $(SMSDK)/public/jit/x86/assembler-x86.cpp listeners.cpp natives.cpp
##############################################
### CONFIGURE ANY OTHER FLAGS/OPTIONS HERE ###

1
msvc10/sdk.vcxproj
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@ -886,7 +886,6 @@
<ClCompile Include="..\extension.cpp" />
<ClCompile Include="..\listeners.cpp" />
<ClCompile Include="..\natives.cpp" />
<ClCompile Include="..\vfunc_call.cpp" />
<ClCompile Include="..\vhook.cpp" />
<ClCompile Include="..\sdk\smsdk_ext.cpp" />
</ItemGroup>

1
msvc10/sdk.vcxproj.filters
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@ -11,7 +11,6 @@
</ClCompile>
<ClCompile Include="..\natives.cpp" />
<ClCompile Include="..\listeners.cpp" />
<ClCompile Include="..\vfunc_call.cpp" />
</ItemGroup>
<ItemGroup>
<ClInclude Include="..\extension.h">

56
natives.cpp
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@ -947,6 +947,58 @@ cell_t Native_GetParamObjectPtrString(IPluginContext *pContext, const cell_t *pa
}
return 1;
}
// DHookGetReturnVector(Handle:hReturn, Float:vec[3])
cell_t Native_GetReturnVector(IPluginContext *pContext, const cell_t *params)
{
HookReturnStruct *returnStruct;
if(!GetHandleIfValidOrError(g_HookReturnHandle, (void **)&returnStruct, pContext, params[1]))
{
return 0;
}
cell_t *buffer;
pContext->LocalToPhysAddr(params[2], &buffer);
if(returnStruct->type == ReturnType_Vector || returnStruct->type == ReturnType_VectorPtr)
{
buffer[0] = sp_ftoc((*(Vector **)returnStruct->orgResult)->x);
buffer[1] = sp_ftoc((*(Vector **)returnStruct->orgResult)->y);
buffer[2] = sp_ftoc((*(Vector **)returnStruct->orgResult)->z);
return 1;
}
return pContext->ThrowNativeError("Return type is not a vector type");
}
//DHookSetReturnVector(Handle:hReturn, Float:vec[3])
cell_t Native_SetReturnVector(IPluginContext *pContext, const cell_t *params)
{
HookReturnStruct *returnStruct;
if(!GetHandleIfValidOrError(g_HookReturnHandle, (void **)&returnStruct, pContext, params[1]))
{
return 0;
}
cell_t *buffer;
pContext->LocalToPhysAddr(params[2], &buffer);
if(returnStruct->type == ReturnType_Vector || returnStruct->type == ReturnType_VectorPtr)
{
if(*(Vector **)returnStruct->newResult != NULL)
{
delete *(Vector **)returnStruct->newResult;
}
*(Vector **)returnStruct->newResult = new Vector(sp_ctof(buffer[0]), sp_ctof(buffer[1]), sp_ctof(buffer[2]));
return 1;
}
return pContext->ThrowNativeError("Return type is not a vector type");
}
//native bool:DHookIsNullParam(Handle:hParams, num);
cell_t Native_IsNullParam(IPluginContext *pContext, const cell_t *params)
{
@ -986,8 +1038,8 @@ sp_nativeinfo_t g_Natives[] =
{"DHookSetReturn", Native_SetReturn},
{"DHookSetParam", Native_SetParam},
{"DHookGetParamVector", Native_GetParamVector},
/*{"DHookGetReturnVector", Native_GetReturnVector},
{"DHookSetReturnVector", Native_SetReturnVector},*/
{"DHookGetReturnVector", Native_GetReturnVector},
{"DHookSetReturnVector", Native_SetReturnVector},
{"DHookSetParamVector", Native_SetParamVector},
{"DHookGetParamString", Native_GetParamString},
{"DHookGetReturnString", Native_GetReturnString},

130
vfunc_call.h
View File

@ -2,6 +2,134 @@
#define _INCLUDE_VFUNC_CALL_H_
#include "vhook.h"
#include "extension.h"
#define PARAMINFO_SWITCH(passType) \
paramInfo[i].flags = dg->params.Element(i).flag; \
paramInfo[i].size = dg->params.Element(i).size; \
paramInfo[i].type = passType;
#define VSTK_PARAM_SWITCH(paramType) \
if(paramStruct->isChanged[i]) \
{ \
*(paramType *)vptr = (paramType)(paramStruct->newParams[i]); \
} \
else \
{ \
*(paramType *)vptr = (paramType)(paramStruct->orgParams[i]); \
} \
if(i + 1 != dg->params.Count()) \
{ \
vptr += dg->params.Element(i).size; \
} \
break;
#define VSTK_PARAM_SWITCH_FLOAT() \
if(paramStruct->isChanged[i]) \
{ \
*(float *)vptr = *(float *)(paramStruct->newParams[i]); \
} \
else \
{ \
*(float *)vptr = *(float *)(paramStruct->orgParams[i]); \
} \
if(i + 1 != dg->params.Count()) \
{ \
vptr += dg->params.Element(i).size; \
} \
break;
template <class T>
T CallVFunction(DHooksCallback *dg, HookParamsStruct *paramStruct, void *iface)
{
SourceMod::PassInfo *paramInfo = NULL;
SourceMod::PassInfo returnInfo;
if(dg->returnType != ReturnType_Void)
{
returnInfo.flags = dg->returnFlag;
returnInfo.size = sizeof(T);
if( dg->returnType != ReturnType_Vector)
{
returnInfo.type = PassType_Basic;
}
else
{
returnInfo.type = PassType_Object;
}
}
ICallWrapper *pCall;
size_t size = GetStackArgsSize(dg);
unsigned char *vstk = (unsigned char *)malloc(sizeof(void *) + size);
unsigned char *vptr = vstk;
*(void **)vptr = iface;
if(paramStruct)
{
vptr += sizeof(void *);
paramInfo = (SourceMod::PassInfo *)malloc(sizeof(SourceMod::PassInfo) * dg->params.Count());
for(int i = 0; i < dg->params.Count(); i++)
{
switch(dg->params.Element(i).type)
{
case HookParamType_Int:
PARAMINFO_SWITCH(PassType_Basic);
VSTK_PARAM_SWITCH(int);
case HookParamType_Bool:
PARAMINFO_SWITCH(PassType_Basic);
VSTK_PARAM_SWITCH(cell_t);
case HookParamType_Float:
PARAMINFO_SWITCH(PassType_Float);
VSTK_PARAM_SWITCH_FLOAT();
case HookParamType_String:
PARAMINFO_SWITCH(PassType_Object);
VSTK_PARAM_SWITCH(int);
case HookParamType_StringPtr:
PARAMINFO_SWITCH(PassType_Basic);
VSTK_PARAM_SWITCH(string_t *);
case HookParamType_CharPtr:
PARAMINFO_SWITCH(PassType_Basic);
VSTK_PARAM_SWITCH(char *);
case HookParamType_VectorPtr:
PARAMINFO_SWITCH(PassType_Basic);
VSTK_PARAM_SWITCH(Vector *);
case HookParamType_CBaseEntity:
PARAMINFO_SWITCH(PassType_Basic);
VSTK_PARAM_SWITCH(CBaseEntity *);
case HookParamType_Edict:
PARAMINFO_SWITCH(PassType_Basic);
VSTK_PARAM_SWITCH(edict_t *);
default:
PARAMINFO_SWITCH(PassType_Basic);
VSTK_PARAM_SWITCH(void *);
}
}
}
T ret = 0;
if(dg->returnType == ReturnType_Void)
{
pCall = g_pBinTools->CreateVCall(dg->offset, 0, 0, NULL, paramInfo, dg->params.Count());
pCall->Execute(vstk, NULL);
}
else
{
pCall = g_pBinTools->CreateVCall(dg->offset, 0, 0, &returnInfo, paramInfo, dg->params.Count());
pCall->Execute(vstk, &ret);
}
pCall->Destroy();
free(vstk);
if(paramInfo != NULL)
{
free(paramInfo);
}
return ret;
}
void *CallVFunction(DHooksCallback *dg, HookParamsStruct *paramStruct, void *iface);
#endif

195
vhook.cpp
View File

@ -53,6 +53,10 @@ DHooksManager::DHooksManager(HookSetup *setup, void *iface, IPluginFunction *rem
{
protoInfo.SetReturnType(sizeof(string_t), SourceHook::PassInfo::PassType_Object, setup->returnFlag, NULL, NULL, NULL, NULL);//We have to be 4 really... or else RIP
}
else if(this->callback->returnType == ReturnType_Vector)
{
protoInfo.SetReturnType(sizeof(Vector), SourceHook::PassInfo::PassType_Object, setup->returnFlag, NULL, NULL, NULL, NULL);
}
else
{
protoInfo.SetReturnType(sizeof(void *), SourceHook::PassInfo::PassType_Basic, setup->returnFlag, NULL, NULL, NULL, NULL);
@ -105,16 +109,29 @@ size_t GetStackArgsSize(DHooksCallback *dg)
{
res += dg->params.Element(i).size;
}
if(dg->returnType == ReturnType_Vector)//Account for result vector ptr.
{
res += sizeof(void *);
}
return res;
}
HookParamsStruct *GetParamStruct(DHooksCallback *dg, void **argStack, size_t argStackSize)
{
HookParamsStruct *params = new HookParamsStruct();
params->dg = dg;
params->orgParams = (void **)malloc(argStackSize);
if(dg->returnType != ReturnType_Vector)
{
params->orgParams = (void **)malloc(argStackSize);
memcpy(params->orgParams, argStack, argStackSize);
}
else //Offset result ptr
{
params->orgParams = (void **)malloc(argStackSize-sizeof(void *));
memcpy(params->orgParams, argStack+sizeof(void *), argStackSize);
}
params->newParams = (void **)malloc(dg->params.Count() * sizeof(void *));
params->isChanged = (bool *)malloc(dg->params.Count() * sizeof(bool));
memcpy(params->orgParams, argStack, argStackSize);
for(int i = 0; i < dg->params.Count(); i++)
{
params->newParams[i] = NULL;
@ -128,6 +145,7 @@ HookReturnStruct *GetReturnStruct(DHooksCallback *dg)
res->isChanged = false;
res->type = dg->returnType;
res->newResult = malloc(sizeof(void *));
*(void **)res->newResult = NULL;
res->orgResult = malloc(sizeof(void *));
if(g_SHPtr->GetOrigRet() && dg->post)
@ -137,7 +155,6 @@ HookReturnStruct *GetReturnStruct(DHooksCallback *dg)
case ReturnType_String:
*(string_t *)res->orgResult = META_RESULT_ORIG_RET(string_t);
break;
//ReturnType_Vector,
case ReturnType_Int:
*(int *)res->orgResult = META_RESULT_ORIG_RET(int);
break;
@ -147,7 +164,14 @@ HookReturnStruct *GetReturnStruct(DHooksCallback *dg)
case ReturnType_Float:
*(float *)res->orgResult = META_RESULT_ORIG_RET(float);
break;
case ReturnType_Vector:
{
Vector vec = META_RESULT_ORIG_RET(Vector);
*(Vector **)res->orgResult = new Vector(vec);
break;
}
default:
*(void **)res->orgResult = malloc(sizeof(void **));
*(void **)res->orgResult = META_RESULT_ORIG_RET(void *);
break;
}
@ -264,7 +288,7 @@ void *Callback(DHooksCallback *dg, void **argStack)
g_SHPtr->DoRecall();
g_SHPtr->SetRes(MRES_SUPERCEDE);
mres = MRES_SUPERCEDE;
ret = CallVFunction(dg, paramStruct, g_SHPtr->GetIfacePtr());
ret = CallVFunction<void *>(dg, paramStruct, g_SHPtr->GetIfacePtr());
break;
case MRES_ChangedOverride:
if(dg->returnType != ReturnType_Void)
@ -284,7 +308,7 @@ void *Callback(DHooksCallback *dg, void **argStack)
g_SHPtr->DoRecall();
g_SHPtr->SetRes(MRES_SUPERCEDE);
mres = MRES_SUPERCEDE;
CallVFunction(dg, paramStruct, g_SHPtr->GetIfacePtr());
CallVFunction<void *>(dg, paramStruct, g_SHPtr->GetIfacePtr());
break;
case MRES_Override:
if(dg->returnType != ReturnType_Void)
@ -418,7 +442,7 @@ void *Callback_float(DHooksCallback *dg, void **argStack)
g_SHPtr->DoRecall();
g_SHPtr->SetRes(MRES_SUPERCEDE);
mres = MRES_SUPERCEDE;
ret = CallVFunction(dg, paramStruct, g_SHPtr->GetIfacePtr());
*(float *)ret = CallVFunction<float>(dg, paramStruct, g_SHPtr->GetIfacePtr());
break;
case MRES_ChangedOverride:
if(dg->returnType != ReturnType_Void)
@ -438,7 +462,7 @@ void *Callback_float(DHooksCallback *dg, void **argStack)
g_SHPtr->DoRecall();
g_SHPtr->SetRes(MRES_SUPERCEDE);
mres = MRES_SUPERCEDE;
CallVFunction(dg, paramStruct, g_SHPtr->GetIfacePtr());
CallVFunction<float>(dg, paramStruct, g_SHPtr->GetIfacePtr());
break;
case MRES_Override:
if(dg->returnType != ReturnType_Void)
@ -497,3 +521,160 @@ void *Callback_float(DHooksCallback *dg, void **argStack)
}
return *(float *)ret;
}
Vector *Callback_vector(DHooksCallback *dg, void **argStack, size_t *argsizep)
{
Vector *vec_result = (Vector *)argStack[0]; // Save the result
HookReturnStruct *returnStruct = NULL;
HookParamsStruct *paramStruct = NULL;
Handle_t rHndl;
Handle_t pHndl;
#ifndef __linux__
*argsizep = GetStackArgsSize(dg);
#else
size_t argsize = GetStackArgsSize(dg);
#endif
if(dg->thisType == ThisPointer_CBaseEntity || dg->thisType == ThisPointer_Address)
{
dg->plugin_callback->PushCell(GetThisPtr(g_SHPtr->GetIfacePtr(), dg->thisType));
}
returnStruct = GetReturnStruct(dg);
rHndl = handlesys->CreateHandle(g_HookReturnHandle, returnStruct, dg->plugin_callback->GetParentRuntime()->GetDefaultContext()->GetIdentity(), myself->GetIdentity(), NULL);
if(!rHndl)
{
dg->plugin_callback->Cancel();
if(returnStruct)
{
delete returnStruct;
}
g_SHPtr->SetRes(MRES_IGNORED);
return NULL;
}
dg->plugin_callback->PushCell(rHndl);
#ifndef __linux__
if(*argsizep > 0)
{
paramStruct = GetParamStruct(dg, argStack, *argsizep);
#else
if(argsize > 0)
{
paramStruct = GetParamStruct(dg, argStack, argsize);
#endif
pHndl = handlesys->CreateHandle(g_HookParamsHandle, paramStruct, dg->plugin_callback->GetParentRuntime()->GetDefaultContext()->GetIdentity(), myself->GetIdentity(), NULL);
if(!pHndl)
{
dg->plugin_callback->Cancel();
if(returnStruct)
{
delete returnStruct;
}
if(paramStruct)
{
delete paramStruct;
}
g_SHPtr->SetRes(MRES_IGNORED);
return NULL;
}
dg->plugin_callback->PushCell(pHndl);
}
cell_t result = (cell_t)MRES_Ignored;
META_RES mres = MRES_IGNORED;
dg->plugin_callback->Execute(&result);
void *ret = g_SHPtr->GetOverrideRetPtr();
ret = vec_result;
switch((MRESReturn)result)
{
case MRES_Handled:
case MRES_ChangedHandled:
g_SHPtr->DoRecall();
g_SHPtr->SetRes(MRES_SUPERCEDE);
mres = MRES_SUPERCEDE;
*vec_result = CallVFunction<Vector>(dg, paramStruct, g_SHPtr->GetIfacePtr());
break;
case MRES_ChangedOverride:
if(dg->returnType != ReturnType_Void)
{
if(returnStruct->isChanged)
{
*vec_result = **(Vector **)returnStruct->newResult;
}
else //Throw an error if no override was set
{
g_SHPtr->SetRes(MRES_IGNORED);
mres = MRES_IGNORED;
dg->plugin_callback->GetParentRuntime()->GetDefaultContext()->ThrowNativeError("Tried to override return value without return value being set");
break;
}
}
g_SHPtr->DoRecall();
g_SHPtr->SetRes(MRES_SUPERCEDE);
mres = MRES_SUPERCEDE;
CallVFunction<Vector>(dg, paramStruct, g_SHPtr->GetIfacePtr());
break;
case MRES_Override:
if(dg->returnType != ReturnType_Void)
{
if(returnStruct->isChanged)
{
g_SHPtr->SetRes(MRES_OVERRIDE);
mres = MRES_OVERRIDE;
*vec_result = **(Vector **)returnStruct->newResult;
}
else //Throw an error if no override was set
{
g_SHPtr->SetRes(MRES_IGNORED);
mres = MRES_IGNORED;
dg->plugin_callback->GetParentRuntime()->GetDefaultContext()->ThrowNativeError("Tried to override return value without return value being set");
}
}
break;
case MRES_Supercede:
if(dg->returnType != ReturnType_Void)
{
if(returnStruct->isChanged)
{
g_SHPtr->SetRes(MRES_SUPERCEDE);
mres = MRES_SUPERCEDE;
*vec_result = **(Vector **)returnStruct->newResult;
}
else //Throw an error if no override was set
{
g_SHPtr->SetRes(MRES_IGNORED);
mres = MRES_IGNORED;
dg->plugin_callback->GetParentRuntime()->GetDefaultContext()->ThrowNativeError("Tried to override return value without return value being set");
}
}
break;
default:
g_SHPtr->SetRes(MRES_IGNORED);
mres = MRES_IGNORED;
break;
}
HandleSecurity sec(dg->plugin_callback->GetParentRuntime()->GetDefaultContext()->GetIdentity(), myself->GetIdentity());
if(returnStruct)
{
handlesys->FreeHandle(rHndl, &sec);
}
if(paramStruct)
{
handlesys->FreeHandle(pHndl, &sec);
}
if(dg->returnType == ReturnType_Void || mres <= MRES_HANDLED)
{
META_CONPRINT("Returning now\n");
vec_result->x = 0;
vec_result->y = 0;
vec_result->z = 0;
return vec_result;
}
return vec_result;
}

41
vhook.h
View File

@ -91,7 +91,7 @@ class HookReturnStruct
public:
~HookReturnStruct()
{
if(this->type != ReturnType_CharPtr && this->type != ReturnType_StringPtr)
if(this->type != ReturnType_CharPtr && this->type != ReturnType_StringPtr && this->type != ReturnType_Vector && this->type != ReturnType_VectorPtr)
{
free(this->newResult);
}
@ -105,6 +105,18 @@ public:
{
delete *(string_t **)this->newResult;
}
else if(this->type == ReturnType_Vector || this->type == ReturnType_VectorPtr)
{
delete *(Vector **)this->newResult;
}
}
if(this->type == ReturnType_Vector || this->type == ReturnType_VectorPtr)
{
delete *(Vector **)this->orgResult;
}
else if(this->type != ReturnType_String && this->type != ReturnType_Int && this->type != ReturnType_Bool && this->type != ReturnType_Float)
{
free(*(void **)this->orgResult);
}
free(this->orgResult);
}
@ -149,6 +161,7 @@ public:
#ifndef __linux__
void *Callback(DHooksCallback *dg, void **stack, size_t *argsizep);
float Callback_float(DHooksCallback *dg, void **stack, size_t *argsizep);
Vector *Callback_vector(DHooksCallback *dg, void **stack, size_t *argsizep);
#else
void *Callback(DHooksCallback *dg, void **stack);
float Callback_float(DHooksCallback *dg, void **stack);
@ -181,23 +194,35 @@ static void *GenerateThunk(ReturnType type)
return base;
}
#else
// HUGE THANKS TO BAILOPAN (dvander)!
static void *GenerateThunk(ReturnType type)
{
MacroAssemblerX86 masm;
static const size_t kStackNeeded = (3 + 1) * 4; // 3 args max, 1 locals max
static const size_t kReserve = ke::Align(kStackNeeded+8, 16)-8;
masm.push(ebp);
masm.movl(ebp, esp);
masm.subl(esp, 4);
masm.push(esp);
masm.lea(eax, Operand(ebp, 8));
masm.push(eax);
masm.push(ecx);
masm.subl(esp, kReserve);
masm.lea(eax, Operand(esp, 3 * 4)); // ptr to 2nd var after argument space
masm.movl(Operand(esp, 2 * 4), eax); // set the ptr as the third argument
masm.lea(eax, Operand(ebp, 8)); // grab the incoming caller argument vector
masm.movl(Operand(esp, 1 * 4), eax); // set that as the 2nd argument
masm.movl(Operand(esp, 0 * 4), ecx); // set |this| as the 1st argument
if(type == ReturnType_Float)
{
masm.call(ExternalAddress(Callback_float));
}
else if(type == ReturnType_Vector)
{
masm.call(ExternalAddress(Callback_vector));
}
else
{
masm.call(ExternalAddress(Callback));
masm.addl(esp, 12);
masm.pop(ecx); // grab arg size
}
masm.movl(ecx, Operand(esp, 3*4));
masm.addl(esp, kReserve);
masm.pop(ebp); // restore ebp
masm.pop(edx); // grab return address in edx
masm.addl(esp, ecx); // remove arguments