diff options
Diffstat (limited to 'net/bpfilter/Makefile')
| -rw-r--r-- | net/bpfilter/Makefile | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/net/bpfilter/Makefile b/net/bpfilter/Makefile new file mode 100644 index 0000000000000..aafa72001fcd7 --- /dev/null +++ b/net/bpfilter/Makefile @@ -0,0 +1,32 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the Linux BPFILTER layer. +# + +hostprogs-y := bpfilter_umh +bpfilter_umh-objs := main.o +HOSTCFLAGS += -I. -Itools/include/ -Itools/include/uapi +HOSTCC := $(CC) + +ifeq ($(CONFIG_BPFILTER_UMH), y) +# builtin bpfilter_umh should be compiled with -static +# since rootfs isn't mounted at the time of __init +# function is called and do_execv won't find elf interpreter +HOSTLDFLAGS += -static +endif + +# a bit of elf magic to convert bpfilter_umh binary into a binary blob +# inside bpfilter_umh.o elf file referenced by +# _binary_net_bpfilter_bpfilter_umh_start symbol +# which bpfilter_kern.c passes further into umh blob loader at run-time +quiet_cmd_copy_umh = GEN $@ + cmd_copy_umh = echo ':' > $(obj)/.bpfilter_umh.o.cmd; \ + $(OBJCOPY) -I binary -O $(CONFIG_OUTPUT_FORMAT) \ + -B `$(OBJDUMP) -f $<|grep architecture|cut -d, -f1|cut -d' ' -f2` \ + --rename-section .data=.init.rodata $< $@ + +$(obj)/bpfilter_umh.o: $(obj)/bpfilter_umh + $(call cmd,copy_umh) + +obj-$(CONFIG_BPFILTER_UMH) += bpfilter.o +bpfilter-objs += bpfilter_kern.o bpfilter_umh.o |