set(CMAKE_C_STANDARD_LIBRARIES " ") # space is intentional
endif()
- # ~~~
- # Build dev_ext_trampoline.c and unknown_ext_chain.c with /O2 to allow tail-call optimization.
- # Setup two CMake targets (loader-norm and loader-opt) for the different compilation flags.
- # ~~~
- set(MODIFIED_C_FLAGS_DEBUG ${CMAKE_C_FLAGS_DEBUG})
-
- string(REPLACE "/Od" "/O2" MODIFIED_C_FLAGS_DEBUG ${MODIFIED_C_FLAGS_DEBUG})
- string(REPLACE "/Ob0" "/Ob2" MODIFIED_C_FLAGS_DEBUG ${MODIFIED_C_FLAGS_DEBUG})
- string(REGEX REPLACE "/RTC." "" MODIFIED_C_FLAGS_DEBUG ${MODIFIED_C_FLAGS_DEBUG}) #remove run-time error checks
-
- separate_arguments(MODIFIED_C_FLAGS_DEBUG WINDOWS_COMMAND ${MODIFIED_C_FLAGS_DEBUG})
-
# ~~~
# Only generate the loader.rc file with CMake if BUILD_DLL_VERSIONINFO was set.
# This feature is for the Vulkan Runtime build
set(OPT_LOADER_SRCS dev_ext_trampoline.c phys_dev_ext.c)
+set(ASM_FAILURE_MSG "Support for unknown physical device and device functions is disabled due to missing the required assembly support code. \
+To support unknown functions, assembly must be added for the platform.\n")
+
# Check for assembler support
-set(ASM_FAILURE_MSG "The build will fall back on building with C code\n")
-set(ASM_FAILURE_MSG "${ASM_FAILURE_MSG}Note that this may be unsafe, as the C code requires tail-call optimizations to remove")
-set(ASM_FAILURE_MSG "${ASM_FAILURE_MSG} the stack frame for certain calls. If the compiler does not do this, then unknown device")
-set(ASM_FAILURE_MSG "${ASM_FAILURE_MSG} extensions will suffer from a corrupted stack.")
-
-if (APPLE_UNIVERSAL_BINARY)
- set(USE_ASSEMBLY_FALLBACK ON)
-elseif(WIN32 AND NOT USE_GAS)
+if(WIN32 AND NOT USE_GAS)
option(USE_MASM "Use MASM" ON)
if(USE_MASM AND MINGW)
find_program(JWASM_FOUND NAMES jwasm uasm)
target_link_libraries(loader-unknown-chain Vulkan::Headers)
target_include_directories(loader-unknown-chain PUBLIC ${CMAKE_CURRENT_BINARY_DIR})
add_dependencies(loader-unknown-chain loader_asm_gen_files)
+ set(LOADER_UNKNOWN_CHAIN_LIBRARY $<TARGET_OBJECTS:loader-unknown-chain>)
+ set(UNKNOWN_FUNCTIONS_SUPPORTED ON)
else()
- set(USE_ASSEMBLY_FALLBACK ON)
message(WARNING "Could not find working MASM assembler\n${ASM_FAILURE_MSG}")
endif()
elseif(UNIX OR MINGW OR (WIN32 AND USE_GAS)) # i.e.: Linux & Apple & MinGW & Windows using Clang-CL
if (APPLE)
set(MODIFY_UNKNOWN_FUNCTION_DECLS ON)
endif()
+ set(UNKNOWN_FUNCTIONS_SUPPORTED ON)
else()
- set(USE_ASSEMBLY_FALLBACK ON)
if(USE_GAS)
message(WARNING "Could not find working ${ASM_OFFSET_SYSTEM_PROCESSOR} GAS assembler\n${ASM_FAILURE_MSG}")
else()
endif()
endif()
-if(USE_ASSEMBLY_FALLBACK)
- add_custom_target(loader_asm_gen_files)
- if (MSVC)
- add_library(loader-unknown-chain OBJECT unknown_ext_chain.c)
- target_link_libraries(loader-unknown-chain loader_specific_options)
- set_target_properties(loader-unknown-chain PROPERTIES CMAKE_C_FLAGS_DEBUG "${MODIFIED_C_FLAGS_DEBUG}")
- else()
- set(OPT_LOADER_SRCS ${OPT_LOADER_SRCS} unknown_ext_chain.c)
- set_source_files_properties(${OPT_LOADER_SRCS} PROPERTIES COMPILE_FLAGS -O)
- endif()
+if(UNKNOWN_FUNCTIONS_SUPPORTED)
+ list(APPEND NORMAL_LOADER_SRCS ${OPT_LOADER_SRCS})
endif()
if(WIN32)
- add_library(loader-opt STATIC ${OPT_LOADER_SRCS})
- target_link_libraries(loader-opt PUBLIC loader_specific_options)
- add_dependencies(loader-opt loader_asm_gen_files)
- set_target_properties(loader-opt PROPERTIES CMAKE_C_FLAGS_DEBUG "${MODIFIED_C_FLAGS_DEBUG}")
-
# If BUILD_DLL_VERSIONINFO was set, use the loader.rc in the build dir, otherwise use the checked in file
set(RC_FILE_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/loader.rc)
if (NOT "$CACHE{BUILD_DLL_VERSIONINFO}" STREQUAL "")
set(RC_FILE_LOCATION ${CMAKE_CURRENT_BINARY_DIR}/loader.rc)
endif()
- set(LOADER_UNKNOWN_CHAIN_LIBRARY $<$<TARGET_EXISTS:loader-unknown-chain>:$<TARGET_OBJECTS:loader-unknown-chain>>)
-
add_library(vulkan
SHARED
${NORMAL_LOADER_SRCS}
${CMAKE_CURRENT_SOURCE_DIR}/${API_TYPE}-1.def
${RC_FILE_LOCATION})
- target_link_libraries(vulkan PRIVATE loader_specific_options loader-opt)
+ target_link_libraries(vulkan PRIVATE loader_specific_options)
# when adding the suffix the import and runtime library names must be consistent
# mingw: libvulkan-1.dll.a / vulkan-1.dll
target_link_libraries(vulkan PRIVATE cfgmgr32)
endif()
- add_dependencies(vulkan loader_asm_gen_files)
-
else()
if(APPLE)
option(APPLE_STATIC_LOADER "Build a loader that can be statically linked. Intended for Chromium usage/testing.")
add_library(vulkan SHARED)
endif()
- target_sources(vulkan PRIVATE ${NORMAL_LOADER_SRCS} ${OPT_LOADER_SRCS})
-
- add_dependencies(vulkan loader_asm_gen_files)
+ target_sources(vulkan PRIVATE ${NORMAL_LOADER_SRCS})
set_target_properties(vulkan PROPERTIES
SOVERSION "1"
file(GLOB_RECURSE CONFIGURE_DEPENDS FRAMEWORK_HEADERS ${VulkanHeaders_INCLUDE_DIRS})
add_library(vulkan-framework SHARED)
- target_sources(vulkan-framework PRIVATE ${NORMAL_LOADER_SRCS} ${OPT_LOADER_SRCS} ${FRAMEWORK_HEADERS})
+ target_sources(vulkan-framework PRIVATE ${NORMAL_LOADER_SRCS} ${FRAMEWORK_HEADERS})
+
+ if (UNKNOWN_FUNCTIONS_SUPPORTED)
+ add_dependencies(vulkan-framework loader_asm_gen_files)
+ endif()
- add_dependencies(vulkan-framework loader_asm_gen_files)
target_link_libraries(vulkan-framework ${CMAKE_DL_LIBS} Threads::Threads -lm "-framework CoreFoundation")
target_link_libraries(vulkan-framework loader_specific_options)
target_link_libraries(vulkan PRIVATE Vulkan::Headers)
add_library(Vulkan::Loader ALIAS vulkan)
+if (UNKNOWN_FUNCTIONS_SUPPORTED)
+ target_compile_definitions(vulkan PRIVATE UNKNOWN_FUNCTIONS_SUPPORTED)
+ add_dependencies(vulkan loader_asm_gen_files)
+endif()
+
if (APPLE_STATIC_LOADER)
# TLDR: This feature only exists at the request of Google for Chromium. No other project should use this!
message(NOTICE "Apple STATIC lib: it will be built but not installed, and vulkan.pc and VulkanLoaderConfig.cmake won't be generated!")
+++ /dev/null
-/*
- * Copyright (c) 2017-2021 The Khronos Group Inc.
- * Copyright (c) 2017-2021 Valve Corporation
- * Copyright (c) 2017-2021 LunarG, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- * Author Jon Ashburn <jon@lunarg.com>
- * Author: Lenny Komow <lenny@lunarg.com>
- * Author: Charles Giessen <charles@lunarg.com>
- */
-
-// This code is used to pass on physical device extensions through the call chain. It must do this without creating a stack frame,
-// because the actual parameters of the call are not known. Since the first parameter is known to be a VkPhysicalDevice, it can
-// unwrap the physical device, overwriting the wrapped device, and then jump to the next function in the call chain. This code
-// attempts to accomplish this by relying on tail-call optimizations, but there is no guarantee that this will work. As a result,
-// this code is only compiled on systems where an assembly alternative has not been written.
-
-#include "loader.h"
-#include "log.h"
-
-#if defined(__GNUC__) && !defined(__clang__)
-#pragma GCC optimize(3) // force gcc to use tail-calls
-#endif
-
-// Trampoline function macro for unknown physical device extension command.
-#define PhysDevExtTramp(num) \
- VKAPI_ATTR void VKAPI_CALL vkPhysDevExtTramp##num(VkPhysicalDevice physical_device) { \
- const struct loader_instance_dispatch_table *disp; \
- disp = loader_get_instance_dispatch(physical_device); \
- disp->phys_dev_ext[num](loader_unwrap_physical_device(physical_device)); \
- }
-
-// Terminator function macro for unknown physical device extension command.
-#define PhysDevExtTermin(num) \
- VKAPI_ATTR void VKAPI_CALL vkPhysDevExtTermin##num(VkPhysicalDevice physical_device) { \
- struct loader_physical_device_term *phys_dev_term = (struct loader_physical_device_term *)physical_device; \
- struct loader_icd_term *icd_term = phys_dev_term->this_icd_term; \
- struct loader_instance *inst = (struct loader_instance *)icd_term->this_instance; \
- if (NULL == icd_term->phys_dev_ext[num]) { \
- loader_log(inst, VULKAN_LOADER_ERROR_BIT, 0, "Function %s not supported for this physical device", \
- inst->phys_dev_ext_disp_functions[num]); \
- } \
- icd_term->phys_dev_ext[num](phys_dev_term->phys_dev); \
- }
-
-// Trampoline function macro for unknown physical device extension command.
-#define DevExtTramp(num) \
- VKAPI_ATTR void VKAPI_CALL vkdev_ext##num(VkDevice device) { \
- const struct loader_dev_dispatch_table *disp; \
- disp = loader_get_dev_dispatch(device); \
- disp->ext_dispatch[num](device); \
- }
-
-// clang-format off
-// Instantiations of the trampoline
-PhysDevExtTramp(0)
-PhysDevExtTramp(1)
-PhysDevExtTramp(2)
-PhysDevExtTramp(3)
-PhysDevExtTramp(4)
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-
-// Instantiations of the terminator
-PhysDevExtTermin(0)
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#include "unknown_function_handling.h"
+// If the assembly code necessary for unknown functions isn't supported, then replace all of the functions with stubs.
+// This way, if an application queries for an unknown function, they receive NULL and can act accordingly.
+// Previously, there was a fallback path written in C. However, it depended on the compiler optimizing the functions
+// in such a way as to not disturb the callstack. This reliance on implementation defined behavior is unsustainable and was only
+// known to work with GCC.
+#if !defined(UNKNOWN_FUNCTIONS_SUPPORTED)
+
+void loader_init_dispatch_dev_ext(struct loader_instance *inst, struct loader_device *dev) {
+ (void)inst;
+ (void)dev;
+}
+void *loader_dev_ext_gpa_tramp(struct loader_instance *inst, const char *funcName) {
+ (void)inst;
+ (void)funcName;
+ return NULL;
+}
+void *loader_dev_ext_gpa_term(struct loader_instance *inst, const char *funcName) {
+ (void)inst;
+ (void)funcName;
+ return NULL;
+}
+
+void *loader_phys_dev_ext_gpa_tramp(struct loader_instance *inst, const char *funcName) {
+ (void)inst;
+ (void)funcName;
+ return NULL;
+}
+void *loader_phys_dev_ext_gpa_term(struct loader_instance *inst, const char *funcName) {
+ (void)inst;
+ (void)funcName;
+ return NULL;
+}
+
+void loader_free_dev_ext_table(struct loader_instance *inst) { (void)inst; }
+void loader_free_phys_dev_ext_table(struct loader_instance *inst) { (void)inst; }
+
+#else
+
#include "allocation.h"
#include "log.h"
void *loader_phys_dev_ext_gpa_term(struct loader_instance *inst, const char *funcName) {
return loader_phys_dev_ext_gpa_impl(inst, funcName, false);
}
+
+#endif
projects / platform / upstream / Vulkan-Loader.git / commitdiff