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bpf: add xBPF ISA

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This patch adds support for xBPF, another ISA targetting the BPF
virtual architecture. For now, the primary difference between eBPF
and xBPF is that xBPF supports indirect calls through the
'call %reg' form of the call instruction.

bfd/
	* archures.c (bfd_mach_xbpf): Define.
	* bfd-in2.h: Regenerate.
	* cpu-bpf.c (bfd_xbpf_arch) New.
	(bfd_bpf_arch) Update next in list field to point to xbpf arch.

cpu/
	* bpf.cpu (arch bpf): Add xbpf mach and isas.
	(define-xbpf-isa) New pmacro.
	(all-isas) Add xbpfle,xbpfbe.
	(endian-isas): New pmacro.
	(mach xbpf): New.
	(model xbpf-def): Likewise.
	(h-gpr): Add xbpf mach.
	(f-dstle, f-srcle, dstle, srcle): Add xbpfle isa.
	(f-dstbe, f-srcbe, dstbe, srcbe): Add xbpfbe isa.
	(define-alu-insn-un): Use new endian-isas pmacro.
	(define-alu-insn-bin, define-alu-insn-mov): Likewise.
	(define-endian-insn, define-lddw): Likewise.
	(dlind, dxli, dxsi, dsti): Likewise.
	(define-cond-jump-insn, define-call-insn): Likewise.
	(define-atomic-insns): Likewise.

gas/
	* config/tc-bpf.c: Add option -mxbpf to select xbpf isa.
	* testsuite/gas/bpf/indcall-1.d: New file.
	* testsuite/gas/bpf/indcall-1.s: Likewise.
	* testsuite/gas/bpf/indcall-bad-1.l: Likewise.
	* testsuite/gas/bpf/indcall-bad-1.s: Likewise.
	* testsuite/gas/bpf/bpf.exp: Run new tests.

opcodes/
	* bpf-desc.c: Regenerate.
	* bpf-desc.h: Likewise.
	* bpf-opc.c: Likewise.
	* bpf-opc.h: Likewise.
	* disassemble.c (disassemble_init_for_target): Set bits for xBPF
	ISA when appropriate.
This commit is contained in:
David Faust
2020-08-26 15:39:00 +02:00
committed by Jose E. Marchesi
parent 37f628c34d
commit 4449c81a85
19 changed files with 543 additions and 323 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
bfd/cpu-bpf.c
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@@ -23,6 +23,26 @@
#include "bfd.h"
#include "libbfd.h"
static const bfd_arch_info_type bfd_xbpf_arch =
{
64, /* Bits per word. */
64, /* Bits per address. */
8, /* Bits per byte. */
bfd_arch_bpf, /* Architecture. */
bfd_mach_xbpf, /* Machine. */
"bpf", /* Architecture name. */
"xbpf", /* Machine name. */
3, /* Section align power. */
FALSE, /* The default ? */
bfd_default_compatible, /* Architecture comparison fn. */
bfd_default_scan, /* String to architecture convert fn. */
bfd_arch_default_fill, /* Default fill. */
NULL, /* Next in list. */
0 /* Maximum offset of a reloc from the start of an insn. */
};
const bfd_arch_info_type bfd_bpf_arch =
{
64, /* Bits per word. */
@@ -37,6 +57,6 @@ const bfd_arch_info_type bfd_bpf_arch =
bfd_default_compatible, /* Architecture comparison fn. */
bfd_default_scan, /* String to architecture convert fn. */
bfd_arch_default_fill, /* Default fill. */
NULL, /* Next in list. */
&bfd_xbpf_arch, /* Next in list. */
0 /* Maximum offset of a reloc from the start of an insn. */
};