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libbpf: Move bpf_{helpers, helper_defs, endian, tracing}.h into libbpf
Move bpf_helpers.h, bpf_tracing.h, and bpf_endian.h into libbpf. Move bpf_helper_defs.h generation into libbpf's Makefile. Ensure all those headers are installed along the other libbpf headers. Also, adjust selftests and samples include path to include libbpf now. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20191008175942.1769476-6-andriin@fb.com
This commit is contained in:
Andrii Nakryiko
committed by
Andrii Nakryiko
Andrii Nakryiko
parent
104006a054
commit
4c55ba2b19
72
src/bpf_endian.h
Normal file
72
src/bpf_endian.h
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@@ -0,0 +1,72 @@
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/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
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#ifndef __BPF_ENDIAN__
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#define __BPF_ENDIAN__
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#include <linux/stddef.h>
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#include <linux/swab.h>
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/* LLVM's BPF target selects the endianness of the CPU
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* it compiles on, or the user specifies (bpfel/bpfeb),
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* respectively. The used __BYTE_ORDER__ is defined by
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* the compiler, we cannot rely on __BYTE_ORDER from
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* libc headers, since it doesn't reflect the actual
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* requested byte order.
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*
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* Note, LLVM's BPF target has different __builtin_bswapX()
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* semantics. It does map to BPF_ALU | BPF_END | BPF_TO_BE
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* in bpfel and bpfeb case, which means below, that we map
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* to cpu_to_be16(). We could use it unconditionally in BPF
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* case, but better not rely on it, so that this header here
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* can be used from application and BPF program side, which
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* use different targets.
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*/
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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# define __bpf_ntohs(x) __builtin_bswap16(x)
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# define __bpf_htons(x) __builtin_bswap16(x)
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# define __bpf_constant_ntohs(x) ___constant_swab16(x)
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# define __bpf_constant_htons(x) ___constant_swab16(x)
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# define __bpf_ntohl(x) __builtin_bswap32(x)
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# define __bpf_htonl(x) __builtin_bswap32(x)
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# define __bpf_constant_ntohl(x) ___constant_swab32(x)
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# define __bpf_constant_htonl(x) ___constant_swab32(x)
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# define __bpf_be64_to_cpu(x) __builtin_bswap64(x)
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# define __bpf_cpu_to_be64(x) __builtin_bswap64(x)
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# define __bpf_constant_be64_to_cpu(x) ___constant_swab64(x)
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# define __bpf_constant_cpu_to_be64(x) ___constant_swab64(x)
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#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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# define __bpf_ntohs(x) (x)
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# define __bpf_htons(x) (x)
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# define __bpf_constant_ntohs(x) (x)
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# define __bpf_constant_htons(x) (x)
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# define __bpf_ntohl(x) (x)
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# define __bpf_htonl(x) (x)
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# define __bpf_constant_ntohl(x) (x)
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# define __bpf_constant_htonl(x) (x)
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# define __bpf_be64_to_cpu(x) (x)
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# define __bpf_cpu_to_be64(x) (x)
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# define __bpf_constant_be64_to_cpu(x) (x)
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# define __bpf_constant_cpu_to_be64(x) (x)
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#else
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# error "Fix your compiler's __BYTE_ORDER__?!"
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#endif
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#define bpf_htons(x) \
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(__builtin_constant_p(x) ? \
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__bpf_constant_htons(x) : __bpf_htons(x))
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#define bpf_ntohs(x) \
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(__builtin_constant_p(x) ? \
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__bpf_constant_ntohs(x) : __bpf_ntohs(x))
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#define bpf_htonl(x) \
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(__builtin_constant_p(x) ? \
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__bpf_constant_htonl(x) : __bpf_htonl(x))
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#define bpf_ntohl(x) \
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(__builtin_constant_p(x) ? \
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__bpf_constant_ntohl(x) : __bpf_ntohl(x))
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#define bpf_cpu_to_be64(x) \
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(__builtin_constant_p(x) ? \
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__bpf_constant_cpu_to_be64(x) : __bpf_cpu_to_be64(x))
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#define bpf_be64_to_cpu(x) \
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(__builtin_constant_p(x) ? \
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__bpf_constant_be64_to_cpu(x) : __bpf_be64_to_cpu(x))
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#endif /* __BPF_ENDIAN__ */
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41
src/bpf_helpers.h
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41
src/bpf_helpers.h
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@@ -0,0 +1,41 @@
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/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
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#ifndef __BPF_HELPERS__
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#define __BPF_HELPERS__
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#include "bpf_helper_defs.h"
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#define __uint(name, val) int (*name)[val]
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#define __type(name, val) typeof(val) *name
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/* Helper macro to print out debug messages */
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#define bpf_printk(fmt, ...) \
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({ \
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char ____fmt[] = fmt; \
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bpf_trace_printk(____fmt, sizeof(____fmt), \
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##__VA_ARGS__); \
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})
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/*
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* Helper macro to place programs, maps, license in
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* different sections in elf_bpf file. Section names
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* are interpreted by elf_bpf loader
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*/
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#define SEC(NAME) __attribute__((section(NAME), used))
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#ifndef __always_inline
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#define __always_inline __attribute__((always_inline))
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#endif
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/*
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* Helper structure used by eBPF C program
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* to describe BPF map attributes to libbpf loader
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*/
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struct bpf_map_def {
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unsigned int type;
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unsigned int key_size;
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unsigned int value_size;
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unsigned int max_entries;
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unsigned int map_flags;
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};
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#endif
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195
src/bpf_tracing.h
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195
src/bpf_tracing.h
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@@ -0,0 +1,195 @@
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/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
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#ifndef __BPF_TRACING_H__
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#define __BPF_TRACING_H__
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/* Scan the ARCH passed in from ARCH env variable (see Makefile) */
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#if defined(__TARGET_ARCH_x86)
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#define bpf_target_x86
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#define bpf_target_defined
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#elif defined(__TARGET_ARCH_s390)
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#define bpf_target_s390
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#define bpf_target_defined
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#elif defined(__TARGET_ARCH_arm)
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#define bpf_target_arm
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#define bpf_target_defined
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#elif defined(__TARGET_ARCH_arm64)
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#define bpf_target_arm64
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#define bpf_target_defined
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#elif defined(__TARGET_ARCH_mips)
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#define bpf_target_mips
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#define bpf_target_defined
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#elif defined(__TARGET_ARCH_powerpc)
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#define bpf_target_powerpc
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#define bpf_target_defined
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#elif defined(__TARGET_ARCH_sparc)
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#define bpf_target_sparc
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#define bpf_target_defined
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#else
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#undef bpf_target_defined
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#endif
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/* Fall back to what the compiler says */
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#ifndef bpf_target_defined
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#if defined(__x86_64__)
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#define bpf_target_x86
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#elif defined(__s390__)
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#define bpf_target_s390
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#elif defined(__arm__)
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#define bpf_target_arm
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#elif defined(__aarch64__)
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#define bpf_target_arm64
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#elif defined(__mips__)
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#define bpf_target_mips
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#elif defined(__powerpc__)
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#define bpf_target_powerpc
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#elif defined(__sparc__)
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#define bpf_target_sparc
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#endif
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#endif
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#if defined(bpf_target_x86)
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#ifdef __KERNEL__
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#define PT_REGS_PARM1(x) ((x)->di)
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#define PT_REGS_PARM2(x) ((x)->si)
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#define PT_REGS_PARM3(x) ((x)->dx)
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#define PT_REGS_PARM4(x) ((x)->cx)
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#define PT_REGS_PARM5(x) ((x)->r8)
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#define PT_REGS_RET(x) ((x)->sp)
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#define PT_REGS_FP(x) ((x)->bp)
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#define PT_REGS_RC(x) ((x)->ax)
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#define PT_REGS_SP(x) ((x)->sp)
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#define PT_REGS_IP(x) ((x)->ip)
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#else
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#ifdef __i386__
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/* i386 kernel is built with -mregparm=3 */
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#define PT_REGS_PARM1(x) ((x)->eax)
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#define PT_REGS_PARM2(x) ((x)->edx)
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#define PT_REGS_PARM3(x) ((x)->ecx)
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#define PT_REGS_PARM4(x) 0
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#define PT_REGS_PARM5(x) 0
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#define PT_REGS_RET(x) ((x)->esp)
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#define PT_REGS_FP(x) ((x)->ebp)
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#define PT_REGS_RC(x) ((x)->eax)
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#define PT_REGS_SP(x) ((x)->esp)
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#define PT_REGS_IP(x) ((x)->eip)
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#else
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#define PT_REGS_PARM1(x) ((x)->rdi)
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#define PT_REGS_PARM2(x) ((x)->rsi)
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#define PT_REGS_PARM3(x) ((x)->rdx)
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#define PT_REGS_PARM4(x) ((x)->rcx)
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#define PT_REGS_PARM5(x) ((x)->r8)
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#define PT_REGS_RET(x) ((x)->rsp)
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#define PT_REGS_FP(x) ((x)->rbp)
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#define PT_REGS_RC(x) ((x)->rax)
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#define PT_REGS_SP(x) ((x)->rsp)
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#define PT_REGS_IP(x) ((x)->rip)
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#endif
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#endif
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#elif defined(bpf_target_s390)
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/* s390 provides user_pt_regs instead of struct pt_regs to userspace */
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struct pt_regs;
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#define PT_REGS_S390 const volatile user_pt_regs
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#define PT_REGS_PARM1(x) (((PT_REGS_S390 *)(x))->gprs[2])
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#define PT_REGS_PARM2(x) (((PT_REGS_S390 *)(x))->gprs[3])
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#define PT_REGS_PARM3(x) (((PT_REGS_S390 *)(x))->gprs[4])
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#define PT_REGS_PARM4(x) (((PT_REGS_S390 *)(x))->gprs[5])
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#define PT_REGS_PARM5(x) (((PT_REGS_S390 *)(x))->gprs[6])
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#define PT_REGS_RET(x) (((PT_REGS_S390 *)(x))->gprs[14])
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/* Works only with CONFIG_FRAME_POINTER */
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#define PT_REGS_FP(x) (((PT_REGS_S390 *)(x))->gprs[11])
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#define PT_REGS_RC(x) (((PT_REGS_S390 *)(x))->gprs[2])
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#define PT_REGS_SP(x) (((PT_REGS_S390 *)(x))->gprs[15])
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#define PT_REGS_IP(x) (((PT_REGS_S390 *)(x))->psw.addr)
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#elif defined(bpf_target_arm)
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#define PT_REGS_PARM1(x) ((x)->uregs[0])
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#define PT_REGS_PARM2(x) ((x)->uregs[1])
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#define PT_REGS_PARM3(x) ((x)->uregs[2])
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#define PT_REGS_PARM4(x) ((x)->uregs[3])
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#define PT_REGS_PARM5(x) ((x)->uregs[4])
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#define PT_REGS_RET(x) ((x)->uregs[14])
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#define PT_REGS_FP(x) ((x)->uregs[11]) /* Works only with CONFIG_FRAME_POINTER */
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#define PT_REGS_RC(x) ((x)->uregs[0])
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#define PT_REGS_SP(x) ((x)->uregs[13])
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#define PT_REGS_IP(x) ((x)->uregs[12])
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#elif defined(bpf_target_arm64)
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/* arm64 provides struct user_pt_regs instead of struct pt_regs to userspace */
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struct pt_regs;
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#define PT_REGS_ARM64 const volatile struct user_pt_regs
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#define PT_REGS_PARM1(x) (((PT_REGS_ARM64 *)(x))->regs[0])
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#define PT_REGS_PARM2(x) (((PT_REGS_ARM64 *)(x))->regs[1])
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#define PT_REGS_PARM3(x) (((PT_REGS_ARM64 *)(x))->regs[2])
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#define PT_REGS_PARM4(x) (((PT_REGS_ARM64 *)(x))->regs[3])
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#define PT_REGS_PARM5(x) (((PT_REGS_ARM64 *)(x))->regs[4])
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#define PT_REGS_RET(x) (((PT_REGS_ARM64 *)(x))->regs[30])
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/* Works only with CONFIG_FRAME_POINTER */
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#define PT_REGS_FP(x) (((PT_REGS_ARM64 *)(x))->regs[29])
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#define PT_REGS_RC(x) (((PT_REGS_ARM64 *)(x))->regs[0])
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#define PT_REGS_SP(x) (((PT_REGS_ARM64 *)(x))->sp)
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#define PT_REGS_IP(x) (((PT_REGS_ARM64 *)(x))->pc)
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#elif defined(bpf_target_mips)
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#define PT_REGS_PARM1(x) ((x)->regs[4])
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#define PT_REGS_PARM2(x) ((x)->regs[5])
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#define PT_REGS_PARM3(x) ((x)->regs[6])
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#define PT_REGS_PARM4(x) ((x)->regs[7])
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#define PT_REGS_PARM5(x) ((x)->regs[8])
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#define PT_REGS_RET(x) ((x)->regs[31])
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#define PT_REGS_FP(x) ((x)->regs[30]) /* Works only with CONFIG_FRAME_POINTER */
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#define PT_REGS_RC(x) ((x)->regs[1])
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#define PT_REGS_SP(x) ((x)->regs[29])
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#define PT_REGS_IP(x) ((x)->cp0_epc)
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#elif defined(bpf_target_powerpc)
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#define PT_REGS_PARM1(x) ((x)->gpr[3])
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#define PT_REGS_PARM2(x) ((x)->gpr[4])
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#define PT_REGS_PARM3(x) ((x)->gpr[5])
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#define PT_REGS_PARM4(x) ((x)->gpr[6])
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#define PT_REGS_PARM5(x) ((x)->gpr[7])
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#define PT_REGS_RC(x) ((x)->gpr[3])
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#define PT_REGS_SP(x) ((x)->sp)
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#define PT_REGS_IP(x) ((x)->nip)
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#elif defined(bpf_target_sparc)
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#define PT_REGS_PARM1(x) ((x)->u_regs[UREG_I0])
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#define PT_REGS_PARM2(x) ((x)->u_regs[UREG_I1])
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#define PT_REGS_PARM3(x) ((x)->u_regs[UREG_I2])
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#define PT_REGS_PARM4(x) ((x)->u_regs[UREG_I3])
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#define PT_REGS_PARM5(x) ((x)->u_regs[UREG_I4])
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#define PT_REGS_RET(x) ((x)->u_regs[UREG_I7])
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#define PT_REGS_RC(x) ((x)->u_regs[UREG_I0])
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#define PT_REGS_SP(x) ((x)->u_regs[UREG_FP])
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/* Should this also be a bpf_target check for the sparc case? */
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#if defined(__arch64__)
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#define PT_REGS_IP(x) ((x)->tpc)
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#else
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#define PT_REGS_IP(x) ((x)->pc)
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#endif
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#endif
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#if defined(bpf_target_powerpc)
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#define BPF_KPROBE_READ_RET_IP(ip, ctx) ({ (ip) = (ctx)->link; })
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#define BPF_KRETPROBE_READ_RET_IP BPF_KPROBE_READ_RET_IP
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#elif defined(bpf_target_sparc)
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#define BPF_KPROBE_READ_RET_IP(ip, ctx) ({ (ip) = PT_REGS_RET(ctx); })
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#define BPF_KRETPROBE_READ_RET_IP BPF_KPROBE_READ_RET_IP
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#else
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#define BPF_KPROBE_READ_RET_IP(ip, ctx) \
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({ bpf_probe_read(&(ip), sizeof(ip), (void *)PT_REGS_RET(ctx)); })
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#define BPF_KRETPROBE_READ_RET_IP(ip, ctx) \
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({ bpf_probe_read(&(ip), sizeof(ip), \
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(void *)(PT_REGS_FP(ctx) + sizeof(ip))); })
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#endif
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#endif
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