| /* |
| * Copyright (c) 2017-2021 The Khronos Group Inc. |
| * Copyright (c) 2017-2021 Valve Corporation |
| * Copyright (c) 2017-2021 LunarG, Inc. |
| * Copyright (c) 2021 NVIDIA CORPORATION & AFFILIATES. All rights reserved. |
| * |
| * 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: Lenny Komow <lenny@lunarg.com> |
| * Author: Charles Giessen <charles@lunarg.com> |
| */ |
| |
| // This code generates an assembly file which provides offsets to get struct members from assembly code. |
| |
| // __USE_MINGW_ANSI_STDIO is needed to use the %zu format specifier with mingw-w64. |
| // Otherwise the compiler will complain about an unknown format specifier. |
| #if defined(__MINGW32__) && !defined(__USE_MINGW_ANSI_STDIO) |
| #define __USE_MINGW_ANSI_STDIO 1 |
| #endif |
| |
| #include <stdio.h> |
| #include "loader_common.h" |
| #include "log.h" |
| |
| #if defined(__GNUC__) || defined(__clang__) |
| void produce_asm_define() { |
| // GCC and clang make it easy to print easy to regex for values |
| __asm__("# VULKAN_LOADER_ERROR_BIT = %c0" : : "i"(VULKAN_LOADER_ERROR_BIT)); |
| __asm__("# PTR_SIZE = %c0" : : "i"(sizeof(void *))); |
| __asm__("# CHAR_PTR_SIZE = %c0" : : "i"(sizeof(char *))); |
| __asm__("# FUNCTION_OFFSET_INSTANCE = %c0" : : "i"(offsetof(struct loader_instance, phys_dev_ext_disp_functions))); |
| __asm__("# PHYS_DEV_OFFSET_INST_DISPATCH = %c0" : : "i"(offsetof(struct loader_instance_dispatch_table, phys_dev_ext))); |
| __asm__("# PHYS_DEV_OFFSET_PHYS_DEV_TRAMP = %c0" : : "i"(offsetof(struct loader_physical_device_tramp, phys_dev))); |
| __asm__("# ICD_TERM_OFFSET_PHYS_DEV_TERM = %c0" : : "i"(offsetof(struct loader_physical_device_term, this_icd_term))); |
| __asm__("# PHYS_DEV_OFFSET_PHYS_DEV_TERM = %c0" : : "i"(offsetof(struct loader_physical_device_term, phys_dev))); |
| __asm__("# INSTANCE_OFFSET_ICD_TERM = %c0" : : "i"(offsetof(struct loader_icd_term, this_instance))); |
| __asm__("# DISPATCH_OFFSET_ICD_TERM = %c0" : : "i"(offsetof(struct loader_icd_term, phys_dev_ext))); |
| __asm__("# EXT_OFFSET_DEVICE_DISPATCH = %c0" : : "i"(offsetof(struct loader_dev_dispatch_table, ext_dispatch))); |
| } |
| #elif defined(_WIN32) |
| // MSVC will print the name of the value and the value in hex |
| // Must disable optimization for this translation unit, otherwise the compiler strips out the variables |
| static const uint32_t PTR_SIZE = sizeof(void *); |
| static const uint32_t CHAR_PTR_SIZE = sizeof(char *); |
| static const uint32_t FUNCTION_OFFSET_INSTANCE = offsetof(struct loader_instance, phys_dev_ext_disp_functions); |
| static const uint32_t PHYS_DEV_OFFSET_INST_DISPATCH = offsetof(struct loader_instance_dispatch_table, phys_dev_ext); |
| static const uint32_t PHYS_DEV_OFFSET_PHYS_DEV_TRAMP = offsetof(struct loader_physical_device_tramp, phys_dev); |
| static const uint32_t ICD_TERM_OFFSET_PHYS_DEV_TERM = offsetof(struct loader_physical_device_term, this_icd_term); |
| static const uint32_t PHYS_DEV_OFFSET_PHYS_DEV_TERM = offsetof(struct loader_physical_device_term, phys_dev); |
| static const uint32_t INSTANCE_OFFSET_ICD_TERM = offsetof(struct loader_icd_term, this_instance); |
| static const uint32_t DISPATCH_OFFSET_ICD_TERM = offsetof(struct loader_icd_term, phys_dev_ext); |
| static const uint32_t EXT_OFFSET_DEVICE_DISPATCH = offsetof(struct loader_dev_dispatch_table, ext_dispatch); |
| #else |
| #warning asm_offset.c variable declarations need to be defined for this platform |
| #endif |
| |
| #if !defined(_MSC_VER) || (_MSC_VER >= 1900) |
| #define SIZE_T_FMT "%-8zu" |
| #elif defined(__GNUC__) || defined(__clang__) |
| #define SIZE_T_FMT "%-8lu" |
| #else |
| #warning asm_offset.c SIZE_T_FMT must be defined for this platform |
| #endif |
| |
| struct ValueInfo { |
| const char *name; |
| size_t value; |
| const char *comment; |
| }; |
| |
| // This file can both be executed to produce gen_defines.asm and contains all the relevant data which |
| // the parse_asm_values.py script needs to write gen_defines.asm, necessary for cross compilation |
| int main(int argc, char **argv) { |
| const char *assembler = NULL; |
| for (int i = 0; i < argc; ++i) { |
| if (!strcmp(argv[i], "MASM")) { |
| assembler = "MASM"; |
| } else if (!strcmp(argv[i], "GAS")) { |
| assembler = "GAS"; |
| } |
| } |
| if (assembler == NULL) { |
| return 1; |
| } |
| |
| struct ValueInfo values[] = { |
| // clang-format off |
| { .name = "VULKAN_LOADER_ERROR_BIT", .value = (size_t) VULKAN_LOADER_ERROR_BIT, |
| .comment = "The numerical value of the enum value 'VULKAN_LOADER_ERROR_BIT'" }, |
| { .name = "PTR_SIZE", .value = sizeof(void*), |
| .comment = "The size of a pointer" }, |
| { .name = "CHAR_PTR_SIZE", .value = sizeof(char *), |
| .comment = "The size of a 'const char *' struct" }, |
| { .name = "FUNCTION_OFFSET_INSTANCE", .value = offsetof(struct loader_instance, phys_dev_ext_disp_functions), |
| .comment = "The offset of 'phys_dev_ext_disp_functions' within a 'loader_instance' struct" }, |
| { .name = "PHYS_DEV_OFFSET_INST_DISPATCH", .value = offsetof(struct loader_instance_dispatch_table, phys_dev_ext), |
| .comment = "The offset of 'phys_dev_ext' within in 'loader_instance_dispatch_table' struct" }, |
| { .name = "PHYS_DEV_OFFSET_PHYS_DEV_TRAMP", .value = offsetof(struct loader_physical_device_tramp, phys_dev), |
| .comment = "The offset of 'phys_dev' within a 'loader_physical_device_tramp' struct" }, |
| { .name = "ICD_TERM_OFFSET_PHYS_DEV_TERM", .value = offsetof(struct loader_physical_device_term, this_icd_term), |
| .comment = "The offset of 'this_icd_term' within a 'loader_physical_device_term' struct" }, |
| { .name = "PHYS_DEV_OFFSET_PHYS_DEV_TERM", .value = offsetof(struct loader_physical_device_term, phys_dev), |
| .comment = "The offset of 'phys_dev' within a 'loader_physical_device_term' struct" }, |
| { .name = "INSTANCE_OFFSET_ICD_TERM", .value = offsetof(struct loader_icd_term, this_instance), |
| .comment = "The offset of 'this_instance' within a 'loader_icd_term' struct" }, |
| { .name = "DISPATCH_OFFSET_ICD_TERM", .value = offsetof(struct loader_icd_term, phys_dev_ext), |
| .comment = "The offset of 'phys_dev_ext' within a 'loader_icd_term' struct" }, |
| { .name = "EXT_OFFSET_DEVICE_DISPATCH", .value = offsetof(struct loader_dev_dispatch_table, ext_dispatch), |
| .comment = "The offset of 'ext_dispatch' within a 'loader_dev_dispatch_table' struct" }, |
| // clang-format on |
| }; |
| |
| FILE *file = loader_fopen("gen_defines.asm", "w"); |
| fprintf(file, "\n"); |
| if (!strcmp(assembler, "MASM")) { |
| for (size_t i = 0; i < sizeof(values) / sizeof(values[0]); ++i) { |
| fprintf(file, "%-32s equ " SIZE_T_FMT "; %s\n", values[i].name, values[i].value, values[i].comment); |
| } |
| } else if (!strcmp(assembler, "GAS")) { |
| #if defined(__x86_64__) || defined(__i386__) |
| const char *comment_delimiter = "#"; |
| #if defined(__x86_64__) |
| fprintf(file, ".set X86_64, 1\n"); |
| #endif // defined(__x86_64__) |
| #elif defined(__aarch64__) |
| const char *comment_delimiter = "//"; |
| fprintf(file, ".set AARCH_64, 1\n"); |
| #else |
| // Default comment delimiter |
| const char *comment_delimiter = "#"; |
| #endif |
| for (size_t i = 0; i < sizeof(values) / sizeof(values[0]); ++i) { |
| fprintf(file, ".set %-32s, " SIZE_T_FMT "%s %s\n", values[i].name, values[i].value, comment_delimiter, |
| values[i].comment); |
| } |
| } |
| return fclose(file); |
| } |