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bpftune: disable stack protection for BPF objects #18

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alan-maguire merged 1 commit into from
Jul 6, 2023
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bpftune: disable stack protection for BPF objects #18

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bpftune: disable stack protection for BPF objects 
as reported in

#12

we see compilation failures like

tcp_buffer_tuner.bpf.c:232:1: error: A call to built-in function '__stack_chk_fail' is not supported.

this looks like [1], which is fixed by disabling stack
protection. Try this here too.

Reported-by: https://github.com/delvin-fil
Signed-off-by: Alan Maguire <[email protected]>
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@alan-maguire
alan-maguire committed Jul 6, 2023
commit b37373518aa781f76c1da81f7feb43b297e03fc4
5 changes: 3 additions & 2 deletions src/Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,7 @@ LLC ?= llc
LLVM_STRIP ?= llvm-strip
BPFTOOL ?= bpftool
BPF_INCLUDE := /usr/include
BPF_CFLAGS := -g -fno-stack-protector
NL_INCLUDE := /usr/include/libnl3
INCLUDES := -I../include -I$(BPF_INCLUDE) -I$(NL_INCLUDE) -I../include/uapi

Expand Down Expand Up @@ -154,9 +155,9 @@ $(OPATH)bpftune.o: $(OPATH)libbpftune.so
$(QUIET_GEN)$(BPFTOOL) gen skeleton $< > $@

$(BPF_OBJS): $(patsubst %.o,%.c,$(BPF_OBJS))
$(CLANG) -g -D__TARGET_ARCH_$(SRCARCH) -O2 -target bpf \
$(CLANG) $(BPF_CFLAGS) -D__TARGET_ARCH_$(SRCARCH) -O2 -target bpf \
$(INCLUDES) -c $(patsubst %.o,%.c,$(@)) -o $(@);
$(CLANG) -g -D__TARGET_ARCH_$(SRCARCH) -DBPFTUNE_LEGACY -O2 -target bpf \
$(CLANG) $(BPF_CFLAGS) -D__TARGET_ARCH_$(SRCARCH) -DBPFTUNE_LEGACY -O2 -target bpf \
$(INCLUDES) -c $(patsubst %.o,%.c,$(@)) \
-o $(patsubst %.o,%.legacy.o,$(@))

Expand Down