[PATCH 4/9] cpu: add eBPF cpu description

[Jose E. Marchesi]

Hi Alan.

    On Mon, May 20, 2019 at 06:45:21PM +0200, Jose E. Marchesi wrote:
    > 	* bpf.cpu: New file.
    > 	* bpf.opc: Likewise.
    
    Seen with --enable-maintainer-mode --enable-cgen-maint=yes.

    cgen -s /home/alan/src/binutils-gdb/opcodes/../cgen/cgen-opc.scm -s
    /home/alan/src/binutils-gdb/opcodes/../cgen -v -f -m all -a
    /home/alan/src/binutils-gdb/opcodes/../cpu/bpf.cpu -OPC
    /home/alan/src/binutils-gdb/opcodes/../cpu/bpf.opc -H
    tmp-24376-desc.h1 -C tmp-24376-desc.c1 -O tmp-24376-opc.h1 -P
    tmp-24376-opc.c1 -L tmp-24376-ibld.in1 -A tmp-24376-asm.in1 -D
    tmp-24376-dis.in1
    Loading cpu description /home/alan/src/binutils-gdb/opcodes/../cpu/bpf.cpu ...
    machs:   all
    isas:    all
    options: 
    trace:   
    diags:   
    Including file /home/alan/src/binutils-gdb/opcodes/../cpu/simplify.inc ...
    Processing cpu description /home/alan/src/binutils-gdb/opcodes/../cpu/bpf.cpu ...
    Canonicalizing instruction semantics ...
    Done canonicalization.
    Analyzing instruction set ...
    Performing sanity checks ...
    Done analysis.
    Generating bpf-desc.h ...
    Generating bpf-desc.c ...
    Generating bpf-opc.h ...
    Generating bpf-opc.c ...
    Generating bpf-ibld.in ...
    Generating bpf-asm.in ...
    ERROR: In procedure string-append:
    ERROR: Wrong type (expecting string): #<unspecified>
    No backtrace available.
    Makefile:1399: recipe for target 'run-cgen' failed

Thanks for testing.  You need to use a cgen featuring the following
patch, which was applied in upstream[1] master a couple of days ago:

commit 36a03558181c69b95543980b945651b974482d76
Author: Jose E. Marchesi <jose.marchesi@oracle.com>
Date:   Tue May 14 20:09:25 2019 +0200

    cgen: partial support for 64-bit wide fields in 32-bit hosts

(Yes now cgen is in git, thanks to Andrew Burgess :))

[1] git://sourceware.org/git/cgen.git