1 /* 2 * Copyright (c) 2017 The Khronos Group Inc. 3 * Copyright (c) 2017 Valve Corporation 4 * Copyright (c) 2017 LunarG, Inc. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 * 18 * Author: Lenny Komow <lenny@lunarg.com> 19 */ 20 21 // This code generates an assembly file which provides offsets to get struct members from assembly code. 22 23 #include <stdio.h> 24 #include "loader.h" 25 26 #if !defined(_MSC_VER) || (_MSC_VER >= 1900) 27 #define SIZE_T_FMT "%-8zu" 28 #else 29 #define SIZE_T_FMT "%-8lu" 30 #endif 31 32 struct ValueInfo 33 { 34 const char *name; 35 size_t value; 36 const char *comment; 37 }; 38 39 int main(int argc, char **argv) { 40 const char *assembler = NULL; 41 for (int i = 0; i < argc; ++i) { 42 if (!strcmp(argv[i], "MASM")) { 43 assembler = "MASM"; 44 } else if (!strcmp(argv[i], "GAS")) { 45 assembler = "GAS"; 46 } 47 } 48 if (assembler == NULL) { 49 return 1; 50 } 51 52 struct loader_instance instance; 53 size_t hash_offset = ((size_t) &instance.phys_dev_ext_disp_hash) - ((size_t) &instance); 54 55 struct loader_instance_dispatch_table disp; 56 size_t phys_dev_offset_dispatch = ((size_t) &disp.phys_dev_ext) - ((size_t) &disp); 57 58 struct loader_physical_device_tramp phys_dev_tramp; 59 size_t phys_dev_offset_tramp = ((size_t) &phys_dev_tramp.phys_dev) - ((size_t) &phys_dev_tramp); 60 61 struct loader_physical_device_term phys_dev_term; 62 size_t icd_term_offset = ((size_t) &phys_dev_term.this_icd_term) - ((size_t) &phys_dev_term); 63 size_t phys_dev_offset_term = ((size_t) &phys_dev_term.phys_dev) - ((size_t) &phys_dev_term); 64 65 struct loader_icd_term icd_term; 66 size_t instance_offset = ((size_t) &icd_term.this_instance) - ((size_t) &icd_term); 67 size_t dispatch_offset = ((size_t) &icd_term.phys_dev_ext) - ((size_t) &icd_term); 68 69 struct loader_dispatch_hash_entry hash; 70 size_t func_name_offset = ((size_t) &hash.func_name) - ((size_t) &hash); 71 72 struct loader_dev_dispatch_table dev_disp; 73 size_t dev_disp_offset = ((size_t) &dev_disp.ext_dispatch) - ((size_t) &dev_disp); 74 75 struct ValueInfo values[] = { 76 { .name = "VK_DEBUG_REPORT_ERROR_BIT_EXT", .value = (size_t) VK_DEBUG_REPORT_ERROR_BIT_EXT, 77 .comment = "The numerical value of the enum value 'VK_DEBUG_REPORT_ERROR_BIT_EXT'" }, 78 { .name = "PTR_SIZE", .value = sizeof(void*), 79 .comment = "The size of a pointer" }, 80 { .name = "HASH_SIZE", .value = sizeof(struct loader_dispatch_hash_entry), 81 .comment = "The size of a 'loader_dispatch_hash_entry' struct" }, 82 { .name = "HASH_OFFSET_INSTANCE", .value = hash_offset, 83 .comment = "The offset of 'phys_dev_ext_disp_hash' within a 'loader_instance' struct" }, 84 { .name = "PHYS_DEV_OFFSET_INST_DISPATCH", .value = phys_dev_offset_dispatch, 85 .comment = "The offset of 'phys_dev_ext' within in 'loader_instance_dispatch_table' struct" }, 86 { .name = "PHYS_DEV_OFFSET_PHYS_DEV_TRAMP", .value = phys_dev_offset_tramp, 87 .comment = "The offset of 'phys_dev' within a 'loader_physical_device_tramp' struct" }, 88 { .name = "ICD_TERM_OFFSET_PHYS_DEV_TERM", .value = icd_term_offset, 89 .comment = "The offset of 'this_icd_term' within a 'loader_physical_device_term' struct" }, 90 { .name = "PHYS_DEV_OFFSET_PHYS_DEV_TERM", .value = phys_dev_offset_term, 91 .comment = "The offset of 'phys_dev' within a 'loader_physical_device_term' struct" }, 92 { .name = "INSTANCE_OFFSET_ICD_TERM", .value = instance_offset, 93 .comment = "The offset of 'this_instance' within a 'loader_icd_term' struct" }, 94 { .name = "DISPATCH_OFFSET_ICD_TERM", .value = dispatch_offset, 95 .comment = "The offset of 'phys_dev_ext' within a 'loader_icd_term' struct" }, 96 { .name = "FUNC_NAME_OFFSET_HASH", .value = func_name_offset, 97 .comment = "The offset of 'func_name' within a 'loader_dispatch_hash_entry' struct" }, 98 { .name = "EXT_OFFSET_DEVICE_DISPATCH", .value = dev_disp_offset, 99 .comment = "The offset of 'ext_dispatch' within a 'loader_dev_dispatch_table' struct" }, 100 }; 101 102 FILE *file = fopen("gen_defines.asm", "w"); 103 fprintf(file, "\n"); 104 if (!strcmp(assembler, "MASM")) { 105 for (size_t i = 0; i < sizeof(values)/sizeof(values[0]); ++i) { 106 fprintf(file, "%-32s equ " SIZE_T_FMT "; %s\n", values[i].name, values[i].value, values[i].comment); 107 } 108 } else if (!strcmp(assembler, "GAS")) { 109 #ifdef __x86_64__ 110 fprintf(file, ".set X86_64, 1\n"); 111 #endif // __x86_64__ 112 for (size_t i = 0; i < sizeof(values)/sizeof(values[0]); ++i) { 113 fprintf(file, ".set %-32s, " SIZE_T_FMT "# %s\n", values[i].name, values[i].value, values[i].comment); 114 } 115 } 116 return fclose(file); 117 } 118