9c01546d26
Convert one of BCC tools (runqslower [0]) to BPF CO-RE + libbpf. It matches
its BCC-based counterpart 1-to-1, supporting all the same parameters and
functionality.
runqslower tool utilizes BPF skeleton, auto-generated from BPF object file,
as well as memory-mapped interface to global (read-only, in this case) data.
Its Makefile also ensures auto-generation of "relocatable" vmlinux.h, which is
necessary for BTF-typed raw tracepoints with direct memory access.
[0] 11bf5d02c8/tools/runqslower.py
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200113073143.1779940-6-andriin@fb.com
3.3 KiB
SPDX-License-Identifier: GPL-2.0
include ../scripts/Makefile.include
prefix ?= /usr/local
CC = gcc LEX = flex YACC = bison MAKE = make INSTALL ?= install
CFLAGS += -Wall -O2 CFLAGS += -D__EXPORTED_HEADERS__ -I$(srctree)/include/uapi -I$(srctree)/include
This will work when bpf is built in tools env. where srctree
isn't set and when invoked from selftests build, where srctree
is set to ".". building_out_of_srctree is undefined for in srctree
builds
ifeq ($(srctree),) update_srctree := 1 endif ifndef building_out_of_srctree update_srctree := 1 endif ifeq ($(update_srctree),1) srctree := $(patsubst %/,%,$(dir $(CURDIR))) srctree := $(patsubst %/,%,$(dir $(srctree))) endif
ifeq ($(V),1) Q = else Q = @ endif
FEATURE_USER = .bpf FEATURE_TESTS = libbfd disassembler-four-args FEATURE_DISPLAY = libbfd disassembler-four-args
check_feat := 1 NON_CHECK_FEAT_TARGETS := clean bpftool_clean runqslower_clean ifdef MAKECMDGOALS ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),) check_feat := 0 endif endif
ifeq ($(check_feat),1) ifeq ($(FEATURES_DUMP),) include $(srctree)/tools/build/Makefile.feature else include $(FEATURES_DUMP) endif endif
ifeq ($(feature-disassembler-four-args), 1) CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE endif
$(OUTPUT)%.yacc.c: $(srctree)/tools/bpf/%.y $(QUIET_BISON)$(YACC) -o $@ -d $<
$(OUTPUT)%.lex.c: $(srctree)/tools/bpf/%.l $(QUIET_FLEX)$(LEX) -o $@ $<
$(OUTPUT)%.o: $(srctree)/tools/bpf/%.c $(QUIET_CC)$(COMPILE.c) -o $@ $<
$(OUTPUT)%.yacc.o: $(OUTPUT)%.yacc.c $(QUIET_CC)$(COMPILE.c) -o $@ $< $(OUTPUT)%.lex.o: $(OUTPUT)%.lex.c $(QUIET_CC)$(COMPILE.c) -o $@ $<
PROGS = $(OUTPUT)bpf_jit_disasm $(OUTPUT)bpf_dbg $(OUTPUT)bpf_asm
all: $(PROGS) bpftool runqslower
$(OUTPUT)bpf_jit_disasm: CFLAGS += -DPACKAGE='bpf_jit_disasm' $(OUTPUT)bpf_jit_disasm: $(OUTPUT)bpf_jit_disasm.o $(QUIET_LINK)$(CC) $(CFLAGS) -o $@ $^ -lopcodes -lbfd -ldl
$(OUTPUT)bpf_dbg: $(OUTPUT)bpf_dbg.o $(QUIET_LINK)$(CC) $(CFLAGS) -o $@ $^ -lreadline
$(OUTPUT)bpf_asm: $(OUTPUT)bpf_asm.o $(OUTPUT)bpf_exp.yacc.o $(OUTPUT)bpf_exp.lex.o $(QUIET_LINK)$(CC) $(CFLAGS) -o $@ $^
$(OUTPUT)bpf_exp.lex.c: $(OUTPUT)bpf_exp.yacc.c $(OUTPUT)bpf_exp.yacc.o: $(OUTPUT)bpf_exp.yacc.c $(OUTPUT)bpf_exp.lex.o: $(OUTPUT)bpf_exp.lex.c
clean: bpftool_clean runqslower_clean
$(call QUIET_CLEAN, bpf-progs)
$(Q)$(RM) -r -- $(OUTPUT).o $(OUTPUT)bpf_jit_disasm $(OUTPUT)bpf_dbg
$(OUTPUT)bpf_asm $(OUTPUT)bpf_exp.yacc. $(OUTPUT)bpf_exp.lex.*
$(call QUIET_CLEAN, core-gen)
$(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpf
$(Q)$(RM) -r -- $(OUTPUT)feature
install: $(PROGS) bpftool_install runqslower_install $(call QUIET_INSTALL, bpf_jit_disasm) $(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/bin $(Q)$(INSTALL) $(OUTPUT)bpf_jit_disasm $(DESTDIR)$(prefix)/bin/bpf_jit_disasm $(call QUIET_INSTALL, bpf_dbg) $(Q)$(INSTALL) $(OUTPUT)bpf_dbg $(DESTDIR)$(prefix)/bin/bpf_dbg $(call QUIET_INSTALL, bpf_asm) $(Q)$(INSTALL) $(OUTPUT)bpf_asm $(DESTDIR)$(prefix)/bin/bpf_asm
bpftool: $(call descend,bpftool)
bpftool_install: $(call descend,bpftool,install)
bpftool_clean: $(call descend,bpftool,clean)
runqslower: $(call descend,runqslower)
runqslower_install: $(call descend,runqslower,install)
runqslower_clean: $(call descend,runqslower,clean)
.PHONY: all install clean bpftool bpftool_install bpftool_clean
runqslower runqslower_install runqslower_clean