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