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/******************************************************************************
* The MIT License (MIT)
*
* Copyright (c) 2019-2020 Baldur Karlsson
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
******************************************************************************/
#include <dlfcn.h>
#include <stddef.h>
#include "common/common.h"
#include "hooks/hooks.h"
class FakeVkHook : LibraryHook
{
public:
void RegisterHooks()
{
LibraryHooks::RegisterLibraryHook("libGL.so", &FakeVkHooked);
LibraryHooks::RegisterLibraryHook("libGL.so.1", &FakeVkHooked);
}
static void FakeVkHooked(void *handle) { searchHandle = handle; }
static void *searchHandle;
} fakevkhook;
void *FakeVkHook::searchHandle = RTLD_NEXT;
extern "C" {
// because we intercept all dlopen calls to "libGL.so*" to ourselves, we can interfere with some
// very poorly configured vulkan ICDs. For some reason they point the vulkan ICD to libGL.so, and so
// the vulkan loader tries to get the bootstrap entry points from our library after the redirect. I
// think this is a distribution thing and is not true in the official nvidia package, I'm not sure.
//
// Unfortunately there's no perfect way to fix this, since if we declare a function the ICD doesn't
// support we're screwed as dlsym will find ours but we'll have nothing to call onwards to. We just
// have to hope the ICD exports all these functions that we can forward on to.
// declare minimal typedefs to get by
typedef void *VkInstance;
enum VkResult
{
VK_ERROR_INCOMPATIBLE_DRIVER = -9
};
struct VkNegotiateLayerInterface;
typedef void (*PFN_vkVoidFunction)(void);
typedef PFN_vkVoidFunction (*PFN_vkGetInstanceProcAddr)(VkInstance instance, const char *pName);
typedef PFN_vkVoidFunction (*PFN_GetPhysicalDeviceProcAddr)(VkInstance instance, const char *pName);
typedef VkResult (*PFN_vkNegotiateLoaderLayerInterfaceVersion)(VkNegotiateLayerInterface *pVersionStruct);
__attribute__((visibility("default"))) PFN_vkVoidFunction vk_icdGetInstanceProcAddr(
VkInstance instance, const char *pName)
{
PFN_vkGetInstanceProcAddr real =
(PFN_vkGetInstanceProcAddr)dlsym(fakevkhook.searchHandle, "vk_icdGetInstanceProcAddr");
if(!real)
real = (PFN_vkGetInstanceProcAddr)dlsym(RTLD_NEXT, "vk_icdGetInstanceProcAddr");
if(real)
return real(instance, pName);
RDCERR("Couldn't get real vk_icdGetInstanceProcAddr!");
return NULL;
}
__attribute__((visibility("default"))) PFN_vkVoidFunction vk_icdGetPhysicalDeviceProcAddr(
VkInstance instance, const char *pName)
{
PFN_GetPhysicalDeviceProcAddr real = (PFN_GetPhysicalDeviceProcAddr)dlsym(
fakevkhook.searchHandle, "vk_icdGetPhysicalDeviceProcAddr");
if(!real)
real = (PFN_GetPhysicalDeviceProcAddr)dlsym(RTLD_NEXT, "vk_icdGetPhysicalDeviceProcAddr");
if(real)
return real(instance, pName);
RDCERR("Couldn't get real vk_icdGetPhysicalDeviceProcAddr!");
return NULL;
}
__attribute__((visibility("default"))) VkResult vk_icdNegotiateLoaderLayerInterfaceVersion(
VkNegotiateLayerInterface *pVersionStruct)
{
PFN_vkNegotiateLoaderLayerInterfaceVersion real = (PFN_vkNegotiateLoaderLayerInterfaceVersion)dlsym(
fakevkhook.searchHandle, "vk_icdNegotiateLoaderLayerInterfaceVersion");
if(!real)
real = (PFN_vkNegotiateLoaderLayerInterfaceVersion)dlsym(
RTLD_NEXT, "vk_icdNegotiateLoaderLayerInterfaceVersion");
if(real)
return real(pVersionStruct);
RDCERR("Couldn't get real vk_icdNegotiateLoaderLayerInterfaceVersion!");
return VK_ERROR_INCOMPATIBLE_DRIVER;
}
}; // extern "C"
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