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2020-08-18libbpf: Switch tracing and CO-RE helper macros to bpf_probe_read_kernel()Andrii Nakryiko1-2/+2
Now that libbpf can automatically fallback to bpf_probe_read() on old kernels not yet supporting bpf_probe_read_kernel(), switch libbpf BPF-side helper macros to use appropriate BPF helper for reading kernel data. Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Cc: Ilya Leoshkevich <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2020-07-31libbpf: Fix register in PT_REGS MIPS macrosJerry Crunchtime1-2/+2
The o32, n32 and n64 calling conventions require the return value to be stored in $v0 which maps to $2 register, i.e., the register 2. Fixes: c1932cd ("bpf: Add MIPS support to samples/bpf.") Signed-off-by: Jerry Crunchtime <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2020-05-15Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netDavid S. Miller1-2/+2
Move the bpf verifier trace check into the new switch statement in HEAD. Resolve the overlapping changes in hinic, where bug fixes overlap the addition of VF support. Signed-off-by: David S. Miller <[email protected]>
2020-05-14libbpf: Fix register naming in PT_REGS s390 macrosSumanth Korikkar1-2/+2
Fix register naming in PT_REGS s390 macros Fixes: b8ebce86ffe6 ("libbpf: Provide CO-RE variants of PT_REGS macros") Signed-off-by: Sumanth Korikkar <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Reviewed-by: Julian Wiedmann <[email protected]> Acked-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2020-05-09tools/libbpf: Add bpf_iter supportYonghong Song1-0/+16
Two new libbpf APIs are added to support bpf_iter: - bpf_program__attach_iter Given a bpf program and additional parameters, which is none now, returns a bpf_link. - bpf_iter_create syscall level API to create a bpf iterator. The macro BPF_SEQ_PRINTF are also introduced. The format looks like: BPF_SEQ_PRINTF(seq, "task id %d\n", pid); This macro can help bpf program writers with nicer bpf_seq_printf syntax similar to the kernel one. Signed-off-by: Yonghong Song <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Acked-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2020-03-17bpf, libbpf: Fix ___bpf_kretprobe_args1(x) macro definitionWenbo Zhang1-1/+1
Use PT_REGS_RC instead of PT_REGS_RET to get ret correctly. Fixes: df8ff35311c8 ("libbpf: Merge selftests' bpf_trace_helpers.h into libbpf's bpf_tracing.h") Signed-off-by: Wenbo Zhang <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2020-03-13libbpf: Provide CO-RE variants of PT_REGS macrosAndrii Nakryiko1-0/+103
Syscall raw tracepoints have struct pt_regs pointer as tracepoint's first argument. After that, reading any of pt_regs fields requires bpf_probe_read(), even for tp_btf programs. Due to that, PT_REGS_PARMx macros are not usable as is. This patch adds CO-RE variants of those macros that use BPF_CORE_READ() to read necessary fields. This provides relocatable architecture-agnostic pt_regs field accesses. Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: Martin KaFai Lau <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2020-03-02libbpf: Merge selftests' bpf_trace_helpers.h into libbpf's bpf_tracing.hAndrii Nakryiko1-0/+118
Move BPF_PROG, BPF_KPROBE, and BPF_KRETPROBE macro into libbpf's bpf_tracing.h header to make it available for non-selftests users. Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2020-03-02libbpf: Fix use of PT_REGS_PARM macros with vmlinux.hAndrii Nakryiko1-1/+1
Add detection of vmlinux.h to bpf_tracing.h header for PT_REGS macro. Currently, BPF applications have to define __KERNEL__ symbol to use correct definition of struct pt_regs on x86 arch. This is due to different field names under internal kernel vs UAPI conditions. To make this more transparent for users, detect vmlinux.h by checking __VMLINUX_H__ symbol. Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-08libbpf: Move bpf_{helpers, helper_defs, endian, tracing}.h into libbpfAndrii Nakryiko1-0/+195
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 <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: Song Liu <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
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