samples/bpf: add 'pointer to packet' tests

[cascardo/linux.git] / samples / bpf / Makefile

diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 9959771..0bf2478 100644 (file)
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -60,6 +60,7 @@ always += spintest_kern.o
 always += map_perf_test_kern.o
 always += test_overhead_tp_kern.o
 always += test_overhead_kprobe_kern.o
+always += parse_varlen.o parse_simple.o parse_ldabs.o
 
 HOSTCFLAGS += -I$(objtree)/usr/include
 
@@ -81,16 +82,44 @@ HOSTLOADLIBES_spintest += -lelf
 HOSTLOADLIBES_map_perf_test += -lelf -lrt
 HOSTLOADLIBES_test_overhead += -lelf -lrt
 
-# point this to your LLVM backend with bpf support
-LLC=$(srctree)/tools/bpf/llvm/bld/Debug+Asserts/bin/llc
+# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
+#  make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang
+LLC ?= llc
+CLANG ?= clang
 
-# asm/sysreg.h inline assmbly used by it is incompatible with llvm.
-# But, ehere is not easy way to fix it, so just exclude it since it is
+# Trick to allow make to be run from this directory
+all:
+       $(MAKE) -C ../../ $$PWD/
+
+clean:
+       $(MAKE) -C ../../ M=$$PWD clean
+       @rm -f *~
+
+# Verify LLVM compiler tools are available and bpf target is supported by llc
+.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
+
+verify_cmds: $(CLANG) $(LLC)
+       @for TOOL in $^ ; do \
+               if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \
+                       echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\
+                       exit 1; \
+               else true; fi; \
+       done
+
+verify_target_bpf: verify_cmds
+       @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \
+               echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\
+               echo "   NOTICE: LLVM version >= 3.7.1 required" ;\
+               exit 2; \
+       else true; fi
+
+$(src)/*.c: verify_target_bpf
+
+# asm/sysreg.h - inline assembly used by it is incompatible with llvm.
+# But, there is no easy way to fix it, so just exclude it since it is
 # useless for BPF samples.
 $(obj)/%.o: $(src)/%.c
-       clang $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \
+       $(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \
                -D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \
+               -Wno-compare-distinct-pointer-types \
                -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@
-       clang $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \
-               -D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \
-               -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=asm -o $@.s