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 11 struct 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 47 extern struct llvm_param llvm_param; 48 int perf_llvm_config(const char *var, const char *value); 49 50 int 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 */ 53 int llvm__search_clang(void); 54 55 /* Following functions are reused by builtin clang support */ 56 void llvm__get_kbuild_opts(char **kbuild_dir, char **kbuild_include_opts); 57 int llvm__get_nr_cpus(void); 58 59 void llvm__dump_obj(const char *path, void *obj_buf, size_t size); 60 #endif 61