On Tue, 2016-06-21 at 15:10 -0700, Richard Henderson wrote:
> Changes since v2:
>  (1) We've got an official number for EM_BPF,
>  (2) A disassembly test case,
>  (3) Added a configure test for <linux/bpf.h>,
>  (4) Byte swapping of bpf_insns during disassembly,
>  (5) ChangeLog entries.

This all looks very good. Only one small build infrastructure thingy:

diff --git a/backends/Makefile.am b/backends/Makefile.am
> @@ -118,6 +118,11 @@ m68k_SRCS = m68k_init.c m68k_symbol.c m68k_regs.c \
>  libebl_m68k_pic_a_SOURCES = $(m68k_SRCS)
>  am_libebl_m68k_pic_a_OBJECTS = $(m68k_SRCS:.c=.os)
>  
> +bpf_SRCS = bpf_init.c bpf_regs.c
> +cpu_bpf = ../libcpu/libcpu_bpf.a
> +libebl_bpf_pic_a_SOURCES = $(bpf_SRCS)
> +am_libebl_bpf_pic_a_OBJECTS = $(bpf_SRCS:.c=.os)

Only the disasm hook (which is already guarded) depends on cpu_bpf.
Since that is only build when we have bpf.h this also needs a guard:

if HAVE_LINUX_BPF_H
cpu_bpf = ../libcpu/libcpu_bpf.a
else
cpu_bpf = 
endif

Lets push this with that small tweak as soon as the glibc elf.h lands.

Thanks,

Mark