1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (C) 2015, Wang Nan <wangnan0@huawei.com>
4 * Copyright (C) 2015, Huawei Inc.
5 */
6 #ifndef __LLVM_UTILS_H
7 #define __LLVM_UTILS_H
8
9 #include <stdbool.h>
10
11 struct llvm_param {
12 /* Path of clang executable */
13 const char *clang_path;
14 /* Path of llc executable */
15 const char *llc_path;
16 /*
17 * Template of clang bpf compiling. 5 env variables
18 * can be used:
19 * $CLANG_EXEC: Path to clang.
20 * $CLANG_OPTIONS: Extra options to clang.
21 * $KERNEL_INC_OPTIONS: Kernel include directories.
22 * $WORKING_DIR: Kernel source directory.
23 * $CLANG_SOURCE: Source file to be compiled.
24 */
25 const char *clang_bpf_cmd_template;
26 /* Will be filled in $CLANG_OPTIONS */
27 const char *clang_opt;
28 /*
29 * If present it'll add -emit-llvm to $CLANG_OPTIONS to pipe
30 * the clang output to llc, useful for new llvm options not
31 * yet selectable via 'clang -mllvm option', such as -mattr=dwarfris
32 * in clang 6.0/llvm 7
33 */
34 const char *opts;
35 /* Where to find kbuild system */
36 const char *kbuild_dir;
37 /*
38 * Arguments passed to make, like 'ARCH=arm' if doing cross
39 * compiling. Should not be used for dynamic compiling.
40 */
41 const char *kbuild_opts;
42 /*
43 * Default is false. If set to true, write compiling result
44 * to object file.
45 */
46 bool dump_obj;
47 /*
48 * Default is false. If one of the above fields is set by user
49 * explicitly then user_set_llvm is set to true. This is used
50 * for perf test. If user doesn't set anything in .perfconfig
51 * and clang is not found, don't trigger llvm test.
52 */
53 bool user_set_param;
54 };
55
56 extern struct llvm_param llvm_param;
57 int perf_llvm_config(const char *var, const char *value);
58
59 int llvm__compile_bpf(const char *path, void **p_obj_buf, size_t *p_obj_buf_sz);
60
61 /* This function is for test__llvm() use only */
62 int llvm__search_clang(void);
63
64 /* Following functions are reused by builtin clang support */
65 void llvm__get_kbuild_opts(char **kbuild_dir, char **kbuild_include_opts);
66 int llvm__get_nr_cpus(void);
67
68 void llvm__dump_obj(const char *path, void *obj_buf, size_t size);
69 #endif