blob: 7878a0e3fa9834e2f6c26e24d341c58b4d13792c [file] [log] [blame]
/* SPDX-License-Identifier: GPL-2.0 */
* Copyright (C) 2015, Wang Nan <>
* Copyright (C) 2015, Huawei Inc.
#ifndef __LLVM_UTILS_H
#define __LLVM_UTILS_H
#include <stdbool.h>
struct llvm_param {
/* Path of clang executable */
const char *clang_path;
/* Path of llc executable */
const char *llc_path;
* Template of clang bpf compiling. 5 env variables
* can be used:
* $CLANG_EXEC: Path to clang.
* $CLANG_OPTIONS: Extra options to clang.
* $KERNEL_INC_OPTIONS: Kernel include directories.
* $WORKING_DIR: Kernel source directory.
* $CLANG_SOURCE: Source file to be compiled.
const char *clang_bpf_cmd_template;
/* Will be filled in $CLANG_OPTIONS */
const char *clang_opt;
* If present it'll add -emit-llvm to $CLANG_OPTIONS to pipe
* the clang output to llc, useful for new llvm options not
* yet selectable via 'clang -mllvm option', such as -mattr=dwarfris
* in clang 6.0/llvm 7
const char *opts;
/* Where to find kbuild system */
const char *kbuild_dir;
* Arguments passed to make, like 'ARCH=arm' if doing cross
* compiling. Should not be used for dynamic compiling.
const char *kbuild_opts;
* Default is false. If set to true, write compiling result
* to object file.
bool dump_obj;
* Default is false. If one of the above fields is set by user
* explicitly then user_set_llvm is set to true. This is used
* for perf test. If user doesn't set anything in .perfconfig
* and clang is not found, don't trigger llvm test.
bool user_set_param;
extern struct llvm_param llvm_param;
int perf_llvm_config(const char *var, const char *value);
int llvm__compile_bpf(const char *path, void **p_obj_buf, size_t *p_obj_buf_sz);
/* This function is for test__llvm() use only */
int llvm__search_clang(void);
/* Following functions are reused by builtin clang support */
void llvm__get_kbuild_opts(char **kbuild_dir, char **kbuild_include_opts);
int llvm__get_nr_cpus(void);
void llvm__dump_obj(const char *path, void *obj_buf, size_t size);