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DynloadPatches: Use different magic values that (hopefully) doesn't collide with real values

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This commit is contained in:
Maschell 2022-10-04 17:34:00 +02:00
parent bfa09b1ccb
commit 451e9c8f76
2 changed files with 16 additions and 10 deletions
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16
source/dynload/dynload_function_replacements.cpp
View File

@ -10,7 +10,7 @@ DECL_FUNCTION(OSDynLoad_Error, OSDynLoad_Acquire, char const *name, OSDynLoad_Mo
DEBUG_FUNCTION_LINE_VERBOSE("Looking for module %s", name);
for (uint32_t i = 0; i < gModuleData->number_modules; i++) {
if (strcmp(name, gModuleData->modules[i].module_export_name) == 0) {
*outModule = (OSDynLoad_Module) (0x13370000 + i);
*outModule = (OSDynLoad_Module) (MODULE_MAGIC | i);
return OS_DYNLOAD_OK;
}
}
@ -29,8 +29,8 @@ DECL_FUNCTION(OSDynLoad_Error, OSDynLoad_FindExport, OSDynLoad_Module module, BO
return OS_DYNLOAD_OK;
}
if (((uint32_t) module & 0xFFFF0000) == 0x13370000) {
uint32_t moduleHandle = ((uint32_t) module) & 0x0000FFFF;
if (((uint32_t) module & MODULE_MAGIC_MASK) == MODULE_MAGIC) {
uint32_t moduleHandle = ((uint32_t) module) & MODULE_ID_MASK;
if (moduleHandle >= gModuleData->number_modules) {
DEBUG_FUNCTION_LINE_ERR("Invalid module handle was encoded in OSDynLoad_Module %d (%08X)", moduleHandle, module);
return result;
@ -67,9 +67,9 @@ DECL_FUNCTION(LOADED_RPL *, LiFindRPLByName, char *name) {
gRPLData[i].fileInfoBuffer = &fileInfoBuffer; // will be copied to the LiImportTracking array
gRPLData[i].loadStateFlags = 0x0;
gRPLData[i].entrypoint = 0x1; //needs to be != 0;
gRPLData[i].funcExports = (Export *) (FUNCTION_EXPORT_MASK + i);
gRPLData[i].funcExports = (Export *) (FUNCTION_EXPORT_MAGIC + i);
gRPLData[i].numFuncExports = 1;
gRPLData[i].dataExports = (Export *) (DATA_EXPORT_MASK + i);
gRPLData[i].dataExports = (Export *) (DATA_EXPORT_MAGIC + i);
gRPLData[i].numDataExports = 1;
return &gRPLData[i];
}
@ -90,10 +90,10 @@ DECL_FUNCTION(uint32_t, __OSDynLoad_InternalAcquire, char *name, void *out, uint
Export ourExportThing;
DECL_FUNCTION(Export *, LiBinSearchExport, Export *exports, int numExports, char *name) {
auto isFunc = (((uint32_t) exports) & 0xFFFF0000) == FUNCTION_EXPORT_MASK;
auto isData = (((uint32_t) exports) & 0xFFFF0000) == DATA_EXPORT_MASK;
auto isFunc = (((uint32_t) exports) & EXPORT_MASK) == FUNCTION_EXPORT_MAGIC;
auto isData = (((uint32_t) exports) & EXPORT_MASK) == DATA_EXPORT_MAGIC;
if (isFunc || isData) {
uint32_t moduleHandle = ((uint32_t) exports) & 0x0000FFFF;
uint32_t moduleHandle = ((uint32_t) exports) & EXPORT_MAGIC_MASK;
if (moduleHandle > gModuleData->number_modules) {
DEBUG_FUNCTION_LINE_LOADER_ERR("Invalid module handle was encoded in Export %d (%08X)", moduleHandle, exports);
return nullptr;

10
source/dynload/loader_defines.h
View File

@ -35,5 +35,11 @@ struct LOADED_RPL {
char u4[12];
};
#define FUNCTION_EXPORT_MASK 0x13370000
#define DATA_EXPORT_MASK 0x13380000
#define EXPORT_MASK 0xFFFF0000
#define EXPORT_MAGIC_MASK 0x0000FFFF
#define FUNCTION_EXPORT_MAGIC 0x88660000
#define DATA_EXPORT_MAGIC 0x88550000
#define MODULE_MAGIC_MASK 0xFFFF0000
#define MODULE_ID_MASK 0x0000FFFF
#define MODULE_MAGIC 0x87650000