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 "debug.h"
10
11struct llvm_param {
12	/* Path of clang executable */
13	const char *clang_path;
14	/*
15	 * Template of clang bpf compiling. 5 env variables
16	 * can be used:
17	 *   $CLANG_EXEC:		Path to clang.
18	 *   $CLANG_OPTIONS:		Extra options to clang.
19	 *   $KERNEL_INC_OPTIONS:	Kernel include directories.
20	 *   $WORKING_DIR:		Kernel source directory.
21	 *   $CLANG_SOURCE:		Source file to be compiled.
22	 */
23	const char *clang_bpf_cmd_template;
24	/* Will be filled in $CLANG_OPTIONS */
25	const char *clang_opt;
26	/* Where to find kbuild system */
27	const char *kbuild_dir;
28	/*
29	 * Arguments passed to make, like 'ARCH=arm' if doing cross
30	 * compiling. Should not be used for dynamic compiling.
31	 */
32	const char *kbuild_opts;
33	/*
34	 * Default is false. If set to true, write compiling result
35	 * to object file.
36	 */
37	bool dump_obj;
38	/*
39	 * Default is false. If one of the above fields is set by user
40	 * explicitly then user_set_llvm is set to true. This is used
41	 * for perf test. If user doesn't set anything in .perfconfig
42	 * and clang is not found, don't trigger llvm test.
43	 */
44	bool user_set_param;
45};
46
47extern struct llvm_param llvm_param;
48int perf_llvm_config(const char *var, const char *value);
49
50int llvm__compile_bpf(const char *path, void **p_obj_buf, size_t *p_obj_buf_sz);
51
52/* This function is for test__llvm() use only */
53int llvm__search_clang(void);
54
55/* Following functions are reused by builtin clang support */
56void llvm__get_kbuild_opts(char **kbuild_dir, char **kbuild_include_opts);
57int llvm__get_nr_cpus(void);
58
59void llvm__dump_obj(const char *path, void *obj_buf, size_t size);
60#endif