Add support for the WebAssembly file format and the wasm32 ELF conversion to gas and the binutils.

binutils * readelf.c: Add support for wasm32 ELF format WebAssembly files.
	(guess_is_rela): Likewise.
	(dump_relocations): Likewise.
	(is_32bit_abs_reloc): Likewise.
	(is_none_reloc_): Likewise.
	* NEWS: Mention the new support.
	* testsuite/lib/binutils-common.exp (is_elf_format): Mark wasm32
	as ELF target.
	(supports_gnu_unique): Mark wasm32 as supporting STB_GNU_UNIQUE.
	* testsuite/binutils-all/nm.exp: Mark wasm32 as requiring .size annotations.
	* testsuite/binutils-all/wasm32: New directory.
	* testsuite/binutils-all/wasm32/create-wasm.d: New file.
	* testsuite/binutils-all/wasm32/create-wasm.s: Likewise.
	* testsuite/binutils-all/wasm32/custom-section.d: Likewise.
	* testsuite/binutils-all/wasm32/custom-section.s: Likewise.
	* testsuite/binutils-all/wasm32/invalid-wasm-1.d: Likewise.
	* testsuite/binutils-all/wasm32/invalid-wasm-1.s: Likewise.
	* testsuite/binutils-all/wasm32/long-sections.d: Likewise.
	* testsuite/binutils-all/wasm32/long-sections.s: Likewise.
	* testsuite/binutils-all/wasm32/parse-wasm.d: Likewise.
	* testsuite/binutils-all/wasm32/parse-wasm.s: Likewise.
	* testsuite/binutils-all/wasm32/parse-wasm-2.d: Likewise.
	* testsuite/binutils-all/wasm32/parse-wasm-2.s: Likewise.
	* testsuite/binutils-all/wasm32/prepared-section.d: Likewise.
	* testsuite/binutils-all/wasm32/prepared-section.s: Likewise.
	* testsuite/binutils-all/wasm32/wasm32.exp: New file, run tests.

gas	* config/tc-wasm32.h: New file: Add WebAssembly assembler target.
	* config/tc-wasm32.c: New file: Add WebAssembly assembler target.
	* Makefile.am: Add WebAssembly assembler target.
	* configure.tgt: Add WebAssembly assembler target.
	* doc/c-wasm32.texi: New file: Start documenting WebAssembly
	assembler.
	* doc/all.texi: Define WASM32.
	* doc/as.texinfo: Add WebAssembly entries.
	* NEWS: Mention the new support.
	* Makefile.in: Regenerate.
	* po/gas.pot: Regenerate.
	* po/POTFILES.in: Regenerate.
	* testsuite/gas/wasm32: New directory.
	* testsuite/gas/wasm32/allinsn.d: New file.
	* testsuite/gas/wasm32/allinsn.s: New file.
	* testsuite/gas/wasm32/illegal.l: New file.
	* testsuite/gas/wasm32/illegal.s: New file.
	* testsuite/gas/wasm32/illegal-2.l: New file.
	* testsuite/gas/wasm32/illegal-2.s: New file.
	* testsuite/gas/wasm32/illegal-3.l: New file.
	* testsuite/gas/wasm32/illegal-3.s: New file.
	* testsuite/gas/wasm32/illegal-4.l: New file.
	* testsuite/gas/wasm32/illegal-4.s: New file.
	* testsuite/gas/wasm32/illegal-5.l: New file.
	* testsuite/gas/wasm32/illegal-5.s: New file.
	* testsuite/gas/wasm32/illegal-6.l: New file.
	* testsuite/gas/wasm32/illegal-6.s: New file.
	* testsuite/gas/wasm32/illegal-7.l: New file.
	* testsuite/gas/wasm32/illegal-7.s: New file.
	* testsuite/gas/wasm32/illegal-8.l: New file.
	* testsuite/gas/wasm32/illegal-8.s: New file.
	* testsuite/gas/wasm32/illegal-9.l: New file.
	* testsuite/gas/wasm32/illegal-9.s: New file.
	* testsuite/gas/wasm32/illegal-10.l: New file.
	* testsuite/gas/wasm32/illegal-10.s: New file.
	* testsuite/gas/wasm32/illegal-11.l: New file.
	* testsuite/gas/wasm32/illegal-11.s: New file.
	* testsuite/gas/wasm32/illegal-12.l: New file.
	* testsuite/gas/wasm32/illegal-12.s: New file.
	* testsuite/gas/wasm32/illegal-13.l: New file.
	* testsuite/gas/wasm32/illegal-13.s: New file.
	* testsuite/gas/wasm32/illegal-14.l: New file.
	* testsuite/gas/wasm32/illegal-14.s: New file.
	* testsuite/gas/wasm32/illegal-15.l: New file.
	* testsuite/gas/wasm32/illegal-15.s: New file.
	* testsuite/gas/wasm32/illegal-16.l: New file.
	* testsuite/gas/wasm32/illegal-16.s: New file.
	* testsuite/gas/wasm32/illegal-17.l: New file.
	* testsuite/gas/wasm32/illegal-17.s: New file.
	* testsuite/gas/wasm32/illegal-18.l: New file.
	* testsuite/gas/wasm32/illegal-18.s: New file.
	* testsuite/gas/wasm32/illegal-19.l: New file.
	* testsuite/gas/wasm32/illegal-19.s: New file.
	* testsuite/gas/wasm32/illegal-20.l: New file.
	* testsuite/gas/wasm32/illegal-20.s: New file.
	* testsuite/gas/wasm32/illegal-21.l: New file.
	* testsuite/gas/wasm32/illegal-21.s: New file.
	* testsuite/gas/wasm32/illegal-22.l: New file.
	* testsuite/gas/wasm32/illegal-22.s: New file.
	* testsuite/gas/wasm32/illegal-24.l: New file.
	* testsuite/gas/wasm32/illegal-24.s: New file.
	* testsuite/gas/wasm32/illegal-25.l: New file.
	* testsuite/gas/wasm32/illegal-25.s: New file.
	* testsuite/gas/wasm32/reloc.d: New file.
	* testsuite/gas/wasm32/reloc.s: New file.
	* testsuite/gas/wasm32/wasm32.exp: New tests for WebAssembly
	architecture.

opcodes * configure.ac: Add (empty) bfd_wasm32_arch target.
	* configure: Regenerate
	* po/opcodes.pot: Regenerate.

include	* opcode/wasm.h: New file to support wasm32 architecture.
	* elf/wasm32.h: Add R_WASM32_32 relocation.

bfd	* elf32-wasm32.c: Add relocation code, two relocs.
	* reloc.c: Add wasm32 relocations.
	* libbfd.h: Regenerate.
	* bfd-in2.h: Regenerate.
	* bfd/po/bfd.pot: Regenerate.

1 files changed, 89 insertions, 0 deletions

diff --git a/gas/config/tc-wasm32.h b/gas/config/tc-wasm32.h
new file mode 100644
index 0000000..220ad56
--- /dev/null
+++ b/gas/config/tc-wasm32.h
@@ -0,0 +1,89 @@
+/* This file is tc-wasm32.h.
+   Copyright (C) 2017 Free Software Foundation, Inc.
+
+   This file is part of GAS, the GNU Assembler.
+
+   GAS is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   GAS is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GAS; see the file COPYING.  If not, write to the Free
+   Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+#define TC_WASM32
+#define TARGET_FORMAT                       "elf32-wasm32"
+#define TARGET_ARCH                        bfd_arch_wasm32
+#define TARGET_MACH                                      1
+
+/* WebAssembly is strictly little-endian.  */
+#define TARGET_BYTES_BIG_ENDIAN                          0
+#define md_number_to_chars    number_to_chars_littleendian
+
+#define DIFF_EXPR_OK
+
+/* No machine-dependent operand expressions.  */
+#define md_operand(x)
+
+/* No broken word processing.  */
+#define WORKING_DOT_WORD
+
+/* Force some relocations.  */
+#define EXTERN_FORCE_RELOC                     1
+extern int wasm32_force_relocation (struct fix *);
+#define TC_FORCE_RELOCATION(fix)               wasm32_force_relocation (fix)
+#define TC_FORCE_RELOCATION_LOCAL(fix)         1
+#define TC_FORCE_RELOCATION_SUB_SAME(fix,seg)  wasm32_force_relocation (fix)
+#define TC_FORCE_RELOCATION_SUB_ABS(fix,seg)   wasm32_force_relocation (fix)
+#define TC_FORCE_RELOCATION_SUB_LOCAL(fix,seg) wasm32_force_relocation (fix)
+#define TC_VALIDATE_FIX_SUB(fix,seg)           wasm32_force_relocation (fix)
+
+/* This is ELF, values passed to md_apply_fix don't include the symbol
+   value.  */
+#define MD_APPLY_SYM_VALUE(FIX)         0
+
+/* PC-relative relocations are relative to the relocation offset.  */
+#define MD_PCREL_FROM_SECTION(FIX, SEC) 0
+
+#define DWARF2_LINE_MIN_INSN_LENGTH 	1
+
+/* WebAssembly uses 32-bit addresses.  */
+#define TC_ADDRESS_BYTES()              4
+#define DWARF2_ADDR_SIZE(bfd)           4
+
+/* Enable cfi directives.  */
+#define TARGET_USE_CFIPOP               1
+
+/* The stack grows down, and there is no harm in claiming it is only
+   byte aligned.  */
+#define DWARF2_CIE_DATA_ALIGNMENT      -1
+
+/* Define the column that represents the PC.  FIXME: this depends on
+   the ABI. */
+#define DWARF2_DEFAULT_RETURN_COLUMN   36
+
+/* Define a hook to setup initial CFI state.  */
+#define tc_cfi_frame_initial_instructions() do { } while (0)
+
+#define elf_tc_final_processing()
+#define md_post_relax_hook
+#define md_start_line_hook()
+#define HANDLE_ALIGN(fragP)
+
+
+extern bfd_boolean wasm32_fix_adjustable (struct fix *);
+#define tc_fix_adjustable(FIX) wasm32_fix_adjustable (FIX)
+
+/* Type names for blocks and signatures.  */
+#define BLOCK_TYPE_NONE              0x40
+#define BLOCK_TYPE_I32               0x7f
+#define BLOCK_TYPE_I64               0x7e
+#define BLOCK_TYPE_F32               0x7d
+#define BLOCK_TYPE_F64               0x7c