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https://github.com/edk2-porting/linux-next.git
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2bd42de0e1
The following commits will use builtin clang to compile BPF scripts. llvm__get_kbuild_opts() and llvm__get_nr_cpus() are extracted to help building '-DKERNEL_VERSION_CODE' and '-D__NR_CPUS__' macros. Doing object dumping in bpf loader, so further builtin clang compiling needn't consider it. Signed-off-by: Wang Nan <wangnan0@huawei.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Joe Stringer <joe@ovn.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/20161126070354.141764-7-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
/*
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* Copyright (C) 2015, Wang Nan <wangnan0@huawei.com>
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* Copyright (C) 2015, Huawei Inc.
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*/
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#ifndef __LLVM_UTILS_H
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#define __LLVM_UTILS_H
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#include "debug.h"
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struct llvm_param {
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/* Path of clang executable */
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const char *clang_path;
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/*
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* Template of clang bpf compiling. 5 env variables
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* can be used:
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* $CLANG_EXEC: Path to clang.
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* $CLANG_OPTIONS: Extra options to clang.
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* $KERNEL_INC_OPTIONS: Kernel include directories.
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* $WORKING_DIR: Kernel source directory.
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* $CLANG_SOURCE: Source file to be compiled.
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*/
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const char *clang_bpf_cmd_template;
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/* Will be filled in $CLANG_OPTIONS */
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const char *clang_opt;
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/* Where to find kbuild system */
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const char *kbuild_dir;
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/*
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* Arguments passed to make, like 'ARCH=arm' if doing cross
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* compiling. Should not be used for dynamic compiling.
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*/
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const char *kbuild_opts;
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/*
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* Default is false. If set to true, write compiling result
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* to object file.
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*/
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bool dump_obj;
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/*
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* Default is false. If one of the above fields is set by user
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* explicitly then user_set_llvm is set to true. This is used
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* for perf test. If user doesn't set anything in .perfconfig
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* and clang is not found, don't trigger llvm test.
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*/
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bool user_set_param;
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};
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extern struct llvm_param llvm_param;
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int perf_llvm_config(const char *var, const char *value);
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int llvm__compile_bpf(const char *path, void **p_obj_buf, size_t *p_obj_buf_sz);
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/* This function is for test__llvm() use only */
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int llvm__search_clang(void);
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/* Following functions are reused by builtin clang support */
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void llvm__get_kbuild_opts(char **kbuild_dir, char **kbuild_include_opts);
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int llvm__get_nr_cpus(void);
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void llvm__dump_obj(const char *path, void *obj_buf, size_t size);
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#endif
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