1 /*
2 * Copyright (c) 2017-2021 The Khronos Group Inc.
3 * Copyright (c) 2017-2021 Valve Corporation
4 * Copyright (c) 2017-2021 LunarG, Inc.
5 * Copyright (c) 2021 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
6 *
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 *
19 * Author: Lenny Komow <lenny@lunarg.com>
20 * Author: Charles Giessen <charles@lunarg.com>
21 */
22
23 // This code generates an assembly file which provides offsets to get struct members from assembly code.
24
25 #include <stdio.h>
26 #include "loader_common.h"
27 #include "log.h"
28
29 #if !defined(_MSC_VER) || (_MSC_VER >= 1900)
30 #define SIZE_T_FMT "%-8zu"
31 #else
32 #define SIZE_T_FMT "%-8lu"
33 #endif
34
35 struct ValueInfo {
36 const char *name;
37 size_t value;
38 const char *comment;
39 };
40
main(int argc,char ** argv)41 int main(int argc, char **argv) {
42 const char *assembler = NULL;
43 for (int i = 0; i < argc; ++i) {
44 if (!strcmp(argv[i], "MASM")) {
45 assembler = "MASM";
46 } else if (!strcmp(argv[i], "GAS")) {
47 assembler = "GAS";
48 }
49 }
50 if (assembler == NULL) {
51 return 1;
52 }
53
54 struct ValueInfo values[] = {
55 // clang-format off
56 { .name = "VULKAN_LOADER_ERROR_BIT", .value = (size_t) VULKAN_LOADER_ERROR_BIT,
57 .comment = "The numerical value of the enum value 'VULKAN_LOADER_ERROR_BIT'" },
58 { .name = "PTR_SIZE", .value = sizeof(void*),
59 .comment = "The size of a pointer" },
60 { .name = "CHAR_PTR_SIZE", .value = sizeof(char *),
61 .comment = "The size of a 'const char *' struct" },
62 { .name = "FUNCTION_OFFSET_INSTANCE", .value = offsetof(struct loader_instance, phys_dev_ext_disp_functions),
63 .comment = "The offset of 'phys_dev_ext_disp_functions' within a 'loader_instance' struct" },
64 { .name = "PHYS_DEV_OFFSET_INST_DISPATCH", .value = offsetof(struct loader_instance_dispatch_table, phys_dev_ext),
65 .comment = "The offset of 'phys_dev_ext' within in 'loader_instance_dispatch_table' struct" },
66 { .name = "PHYS_DEV_OFFSET_PHYS_DEV_TRAMP", .value = offsetof(struct loader_physical_device_tramp, phys_dev),
67 .comment = "The offset of 'phys_dev' within a 'loader_physical_device_tramp' struct" },
68 { .name = "ICD_TERM_OFFSET_PHYS_DEV_TERM", .value = offsetof(struct loader_physical_device_term, this_icd_term),
69 .comment = "The offset of 'this_icd_term' within a 'loader_physical_device_term' struct" },
70 { .name = "PHYS_DEV_OFFSET_PHYS_DEV_TERM", .value = offsetof(struct loader_physical_device_term, phys_dev),
71 .comment = "The offset of 'phys_dev' within a 'loader_physical_device_term' struct" },
72 { .name = "INSTANCE_OFFSET_ICD_TERM", .value = offsetof(struct loader_icd_term, this_instance),
73 .comment = "The offset of 'this_instance' within a 'loader_icd_term' struct" },
74 { .name = "DISPATCH_OFFSET_ICD_TERM", .value = offsetof(struct loader_icd_term, phys_dev_ext),
75 .comment = "The offset of 'phys_dev_ext' within a 'loader_icd_term' struct" },
76 { .name = "EXT_OFFSET_DEVICE_DISPATCH", .value = offsetof(struct loader_dev_dispatch_table, ext_dispatch),
77 .comment = "The offset of 'ext_dispatch' within a 'loader_dev_dispatch_table' struct" },
78 // clang-format on
79 };
80
81 FILE *file = fopen("gen_defines.asm", "w");
82 fprintf(file, "\n");
83 if (!strcmp(assembler, "MASM")) {
84 for (size_t i = 0; i < sizeof(values) / sizeof(values[0]); ++i) {
85 fprintf(file, "%-32s equ " SIZE_T_FMT "; %s\n", values[i].name, values[i].value, values[i].comment);
86 }
87 } else if (!strcmp(assembler, "GAS")) {
88 #if defined(__x86_64__) || defined(__i386__)
89 const char *comment_delimiter = "#";
90 #if defined(__x86_64__)
91 fprintf(file, ".set X86_64, 1\n");
92 #endif // defined(__x86_64__)
93 #elif defined(__aarch64__)
94 const char *comment_delimiter = "//";
95 fprintf(file, ".set AARCH_64, 1\n");
96 #else
97 // Default comment delimiter
98 const char *comment_delimiter = "#";
99 #endif
100 for (size_t i = 0; i < sizeof(values) / sizeof(values[0]); ++i) {
101 fprintf(file, ".set %-32s, " SIZE_T_FMT "%s %s\n", values[i].name, values[i].value, comment_delimiter,
102 values[i].comment);
103 }
104 }
105 return fclose(file);
106 }
107