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
11struct 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
56extern struct llvm_param llvm_param;
57int perf_llvm_config(const char *var, const char *value);
58
59int 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 */
62int llvm__search_clang(void);
63
64/* Following functions are reused by builtin clang support */
65void llvm__get_kbuild_opts(char **kbuild_dir, char **kbuild_include_opts);
66int llvm__get_nr_cpus(void);
67
68void llvm__dump_obj(const char *path, void *obj_buf, size_t size);
69#endif