Add support for disassembling WebAssembly opcodes.

include	* dis-asm.h: Add prototypes for wasm32 disassembler.

opcodes	* Makefile.am: Add wasm32-dis.c.
	* configure.ac: Add wasm32-dis.c to wasm32 target.
	* disassemble.c: Add wasm32 disassembler code.
	* wasm32-dis.c: New file.
	* Makefile.in: Regenerate.
	* configure: Regenerate.
	* po/POTFILES.in: Regenerate.
	* po/opcodes.pot: Regenerate.

gas	* testsuite/gas/wasm32/allinsn.d: Adjust test for disassembler
	changes.
	* testsuite/gas/wasm32/disass.d: New test.
	* testsuite/gas/wasm32/disass.s: New test.
	* testsuite/gas/wasm32/disass-2.d: New test.
	* testsuite/gas/wasm32/disass-2.s: New test.
	* testsuite/gas/wasm32/reloc.d: Adjust test for changed reloc
	names.
	* testsuite/gas/wasm32/reloc.s: Update test for changed assembler
	syntax.
	* testsuite/gas/wasm32/wasm32.exp: Run new tests.  Expect allinsn
	test to succeed.
This commit is contained in:
Pip Cet 2017-04-06 17:17:15 +01:00 committed by Nick Clifton
parent 0dedf3777d
commit 62ecb94c4a
20 changed files with 654 additions and 41 deletions

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@ -1,3 +1,18 @@
2017-04-06 Pip Cet <pipcet@gmail.com>
* testsuite/gas/wasm32/allinsn.d: Adjust test for disassembler
changes.
* testsuite/gas/wasm32/disass.d: New test.
* testsuite/gas/wasm32/disass.s: New test.
* testsuite/gas/wasm32/disass-2.d: New test.
* testsuite/gas/wasm32/disass-2.s: New test.
* testsuite/gas/wasm32/reloc.d: Adjust test for changed reloc
names.
* testsuite/gas/wasm32/reloc.s: Update test for changed assembler
syntax.
* testsuite/gas/wasm32/wasm32.exp: Run new tests. Expect allinsn
test to succeed.
2017-04-04 H.J. Lu <hongjiu.lu@intel.com>
* NEWS: Mention support for ELF SHF_GNU_MBIND.

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@ -11,7 +11,7 @@ Disassembly of section .text:
0: 02 40 block\[\]
2: 0c 00 br 0
4: 0d 00 br_if 0
6: 0e 01 01 01 br_table 1 1
6: 0e 01 01 01 br_table 1 1 1
a: 10 00 call 0x0
c: 11 00 00 call_indirect 0 0
f: 1a drop
@ -22,12 +22,12 @@ Disassembly of section .text:
14: 8d f32.ceil
15: 43 d0 0f 49 f32.const 3.141590118408203125
19: 40
1a: b2 f32.convert_s_i32
1b: b4 f32.convert_s_i64
1c: b3 f32.convert_u_i32
1d: b5 f32.convert_u_i64
1a: b2 f32.convert_s/i32
1b: b4 f32.convert_s/i64
1c: b3 f32.convert_u/i32
1d: b5 f32.convert_u/i64
1e: 98 f32.copysign
1f: b6 f32.demote_f64
1f: b6 f32.demote/f64
20: 95 f32.div
21: 5b f32.eq
22: 8e f32.floor
@ -42,7 +42,7 @@ Disassembly of section .text:
2d: 5c f32.ne
2e: 90 f32.nearest
2f: 8c f32.neg
30: be f32.reinterpret_i32
30: be f32.reinterpret/i32
31: 91 f32.sqrt
32: 38 00 00 f32.store a=0 0
35: 93 f32.sub
@ -53,10 +53,10 @@ Disassembly of section .text:
3a: 44 97 5f 4f f64.const 3.14158999999999976088e\+200
3e: fd bc 6a 90
42: 69
43: b7 f64.convert_s_i32
44: b9 f64.convert_s_i64
45: b8 f64.convert_u_i32
46: ba f64.convert_u_i64
43: b7 f64.convert_s/i32
44: b9 f64.convert_s/i64
45: b8 f64.convert_u/i32
46: ba f64.convert_u/i64
47: a6 f64.copysign
48: a3 f64.div
49: 61 f64.eq
@ -72,14 +72,14 @@ Disassembly of section .text:
55: 62 f64.ne
56: 9e f64.nearest
57: 9a f64.neg
58: bb f64.promote_f32
59: bf f64.reinterpret_i64
58: bb f64.promote/f32
59: bf f64.reinterpret/i64
5a: 9f f64.sqrt
5b: 39 00 00 f64.store a=0 0
5e: a1 f64.sub
5f: 9d f64.trunc
60: 23 00 get_global 0 <\$got>
62: 20 00 get_local 0 <\$dpc>
60: 23 00 get_global 0
62: 20 00 get_local 0
64: 6a i32.add
65: 71 i32.and
66: 67 i32.clz
@ -107,7 +107,7 @@ Disassembly of section .text:
8a: 47 i32.ne
8b: 72 i32.or
8c: 69 i32.popcnt
8d: bc i32.reinterpret_f32
8d: bc i32.reinterpret/f32
8e: 6f i32.rem_s
8f: 70 i32.rem_u
90: 77 i32.rotl
@ -119,11 +119,11 @@ Disassembly of section .text:
98: 3b 00 00 i32.store16 a=0 0
9b: 3a 00 00 i32.store8 a=0 0
9e: 6b i32.sub
9f: a8 i32.trunc_s_f32
a0: aa i32.trunc_s_f64
a1: a9 i32.trunc_u_f32
a2: ab i32.trunc_u_f64
a3: a7 i32.wrap_i64
9f: a8 i32.trunc_s/f32
a0: aa i32.trunc_s/f64
a1: a9 i32.trunc_u/f32
a2: ab i32.trunc_u/f64
a3: a7 i32.wrap/i64
a4: 73 i32.xor
a5: 7c i64.add
a6: 83 i64.and
@ -136,8 +136,8 @@ Disassembly of section .text:
b4: 80 i64.div_u
b5: 51 i64.eq
b6: 50 i64.eqz
b7: ac i64.extend_s_i32
b8: ad i64.extend_u_i32
b7: ac i64.extend_s/i32
b8: ad i64.extend_u/i32
b9: 59 i64.ge_s
ba: 5a i64.ge_u
bb: 55 i64.gt_s
@ -157,7 +157,7 @@ Disassembly of section .text:
d7: 52 i64.ne
d8: 84 i64.or
d9: 7b i64.popcnt
da: bd i64.reinterpret_f64
da: bd i64.reinterpret/f64
db: 81 i64.rem_s
dc: 82 i64.rem_u
dd: 89 i64.rotl
@ -170,20 +170,20 @@ Disassembly of section .text:
e8: 3e 00 00 i64.store32 a=0 0
eb: 3c 00 00 i64.store8 a=0 0
ee: 7d i64.sub
ef: ae i64.trunc_s_f32
f0: b0 i64.trunc_s_f64
f1: af i64.trunc_u_f32
f2: b1 i64.trunc_u_f64
ef: ae i64.trunc_s/f32
f0: b0 i64.trunc_s/f64
f1: af i64.trunc_u/f32
f2: b1 i64.trunc_u/f64
f3: 85 i64.xor
f4: 04 7f if\[i\]
f6: 03 7e loop\[l\]
f8: 01 nop
f9: 0f return
fa: 1b select
fb: 24 00 set_global 0 <\$got>
fd: 21 00 set_local 0 <\$dpc>
fb: 24 00 set_global 0
fd: 21 00 set_local 0
ff: 60 f32.ge
100: 08 .byte 08
100: 08 .byte 0x08
101: 7f i64.div_s
102: 7e i64.mul
@ -194,5 +194,5 @@ Disassembly of section .text:
107: 7e i64.mul
108: 7f i64.div_s
109: 00 unreachable
10a: 22 00 tee_local 0 <\$dpc>
10a: 22 00 tee_local 0
...

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@ -0,0 +1,9 @@
#as:
#objdump: -d -Mglobals
#name: disass-2.d
^dump.o: file format elf32-wasm32$
^Disassembly of section .text:$
^00000000 <.text>:$
^ 0: 20 00 get_local 0$
^ 2: 23 00 get_global 0 <\$got>$

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@ -0,0 +1,3 @@
.text
get_local 0
get_global 0

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@ -0,0 +1,9 @@
#as:
#objdump: -d -Mregisters,globals
#name: disass.d
^dump.o: file format elf32-wasm32$
^Disassembly of section .text:$
^00000000 <.text>:$
^ 0: 20 00 get_local 0 <\$dpc>$
^ 2: 23 00 get_global 0 <\$got>$

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@ -0,0 +1,3 @@
.text
get_local 0
get_global 0

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@ -9,10 +9,11 @@ Disassembly of section .text:
00000000 <.text>:
0: 41 80 80 80 i32.const 0
4: 80 00
1: R_ASMJS_LEB128_PLT f
1: R_WASM32_PLT_SIG __sigchar_FiiiiiiiE
1: R_WASM32_LEB128_PLT f
6: 41 80 80 80 i32.const 0
a: 80 00
7: R_ASMJS_LEB128_GOT x
7: R_WASM32_LEB128_GOT x
c: 41 80 80 80 i32.const 0
10: 80 00
d: R_ASMJS_LEB128_GOT_CODE f
d: R_WASM32_LEB128_GOT_CODE f

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@ -1,3 +1,3 @@
i32.const f@plt
i32.const f@plt{__sigchar_FiiiiiiiE}
i32.const x@got
i32.const f@gotcode

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@ -21,8 +21,6 @@
# wasm32 assembler testsuite.
if [istarget wasm32-*-*] {
# no disassembler support yet
setup_xfail "wasm32-*-*"
run_dump_test "allinsn"
# no GOT/PLT relocs yet.
setup_xfail "wasm32-*-*"
@ -55,4 +53,6 @@ if [istarget wasm32-*-*] {
# illegal-23 has become legal
run_list_test "illegal-24"
run_list_test "illegal-25"
run_dump_test "disass"
run_dump_test "disass-2"
}

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@ -1,3 +1,7 @@
2017-04-06 Pip Cet <pipcet@gmail.com>
* dis-asm.h: Add prototypes for wasm32 disassembler.
2017-04-05 Pedro Alves <palves@redhat.com>
* dis-asm.h (disassemble_info) <disassembler_options>: Now a

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@ -318,6 +318,7 @@ extern int print_insn_v850 (bfd_vma, disassemble_info *);
extern int print_insn_vax (bfd_vma, disassemble_info *);
extern int print_insn_visium (bfd_vma, disassemble_info *);
extern int print_insn_w65 (bfd_vma, disassemble_info *);
extern int print_insn_wasm32 (bfd_vma, disassemble_info *);
extern int print_insn_xc16x (bfd_vma, disassemble_info *);
extern int print_insn_xgate (bfd_vma, disassemble_info *);
extern int print_insn_xstormy16 (bfd_vma, disassemble_info *);
@ -343,10 +344,12 @@ extern void print_riscv_disassembler_options (FILE *);
extern void print_arm_disassembler_options (FILE *);
extern void print_arc_disassembler_options (FILE *);
extern void print_s390_disassembler_options (FILE *);
extern void print_wasm32_disassembler_options (FILE *);
extern bfd_boolean aarch64_symbol_is_valid (asymbol *, struct disassemble_info *);
extern bfd_boolean arm_symbol_is_valid (asymbol *, struct disassemble_info *);
extern void disassemble_init_powerpc (struct disassemble_info *);
extern void disassemble_init_s390 (struct disassemble_info *);
extern void disassemble_init_wasm32 (struct disassemble_info *);
extern const disasm_options_t *disassembler_options_powerpc (void);
extern const disasm_options_t *disassembler_options_arm (void);
extern const disasm_options_t *disassembler_options_s390 (void);

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@ -1,3 +1,14 @@
2017-04-06 Pip Cet <pipcet@gmail.com>
* Makefile.am: Add wasm32-dis.c.
* configure.ac: Add wasm32-dis.c to wasm32 target.
* disassemble.c: Add wasm32 disassembler code.
* wasm32-dis.c: New file.
* Makefile.in: Regenerate.
* configure: Regenerate.
* po/POTFILES.in: Regenerate.
* po/opcodes.pot: Regenerate.
2017-04-05 Pedro Alves <palves@redhat.com>
* arc-dis.c (parse_option, parse_disassembler_options): Constify.

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@ -259,6 +259,7 @@ TARGET_LIBOPCODES_CFILES = \
visium-dis.c \
visium-opc.c \
w65-dis.c \
wasm32-dis.c \
xc16x-asm.c \
xc16x-desc.c \
xc16x-dis.c \

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@ -561,6 +561,7 @@ TARGET_LIBOPCODES_CFILES = \
visium-dis.c \
visium-opc.c \
w65-dis.c \
wasm32-dis.c \
xc16x-asm.c \
xc16x-desc.c \
xc16x-dis.c \
@ -969,6 +970,7 @@ distclean-compile:
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/visium-dis.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/visium-opc.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/w65-dis.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/wasm32-dis.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/xc16x-asm.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/xc16x-desc.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/xc16x-dis.Plo@am__quote@

2
opcodes/configure vendored
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@ -12724,7 +12724,7 @@ if test x${all_targets} = xfalse ; then
bfd_vax_arch) ta="$ta vax-dis.lo" ;;
bfd_visium_arch) ta="$ta visium-dis.lo visium-opc.lo" ;;
bfd_w65_arch) ta="$ta w65-dis.lo" ;;
bfd_wasm32_arch) ;;
bfd_wasm32_arch) ta="$ta wasm32-dis.lo" ;;
bfd_we32k_arch) ;;
bfd_xc16x_arch) ta="$ta xc16x-asm.lo xc16x-desc.lo xc16x-dis.lo xc16x-ibld.lo xc16x-opc.lo" using_cgen=yes ;;
bfd_xgate_arch) ta="$ta xgate-dis.lo xgate-opc.lo" ;;

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@ -348,7 +348,7 @@ if test x${all_targets} = xfalse ; then
bfd_vax_arch) ta="$ta vax-dis.lo" ;;
bfd_visium_arch) ta="$ta visium-dis.lo visium-opc.lo" ;;
bfd_w65_arch) ta="$ta w65-dis.lo" ;;
bfd_wasm32_arch) ;;
bfd_wasm32_arch) ta="$ta wasm32-dis.lo" ;;
bfd_we32k_arch) ;;
bfd_xc16x_arch) ta="$ta xc16x-asm.lo xc16x-desc.lo xc16x-dis.lo xc16x-ibld.lo xc16x-opc.lo" using_cgen=yes ;;
bfd_xgate_arch) ta="$ta xgate-dis.lo xgate-opc.lo" ;;

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@ -94,6 +94,7 @@
#define ARCH_vax
#define ARCH_visium
#define ARCH_w65
#define ARCH_wasm32
#define ARCH_xstormy16
#define ARCH_xc16x
#define ARCH_xgate
@ -474,6 +475,11 @@ disassembler (bfd *abfd)
disassemble = print_insn_w65;
break;
#endif
#ifdef ARCH_wasm32
case bfd_arch_wasm32:
disassemble = print_insn_wasm32;
break;
#endif
#ifdef ARCH_xgate
case bfd_arch_xgate:
disassemble = print_insn_xgate;
@ -580,6 +586,9 @@ disassembler_usage (FILE *stream ATTRIBUTE_UNUSED)
#ifdef ARCH_s390
print_s390_disassembler_options (stream);
#endif
#ifdef ARCH_wasm32
print_wasm32_disassembler_options (stream);
#endif
return;
}
@ -650,6 +659,11 @@ disassemble_init_for_target (struct disassemble_info * info)
disassemble_init_powerpc (info);
break;
#endif
#ifdef ARCH_wasm32
case bfd_arch_wasm32:
disassemble_init_wasm32 (info);
break;
#endif
#ifdef ARCH_s390
case bfd_arch_s390:
disassemble_init_s390 (info);

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@ -217,6 +217,7 @@ visium-dis.c
visium-opc.c
w65-dis.c
w65-opc.h
wasm32-dis.c
xc16x-asm.c
xc16x-desc.c
xc16x-desc.h

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@ -8,7 +8,7 @@ msgid ""
msgstr ""
"Project-Id-Version: PACKAGE VERSION\n"
"Report-Msgid-Bugs-To: bug-binutils@gnu.org\n"
"POT-Creation-Date: 2017-03-29 17:08+0100\n"
"POT-Creation-Date: 2017-04-06 16:22+0100\n"
"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
"Language-Team: LANGUAGE <LL@li.org>\n"
@ -1695,6 +1695,22 @@ msgstr ""
msgid "invalid register name"
msgstr ""
#: wasm32-dis.c:89
msgid "Disassemble \"register\" names"
msgstr ""
#: wasm32-dis.c:90
msgid "Name well-known globals"
msgstr ""
#: wasm32-dis.c:489
#, c-format
msgid ""
"The following WebAssembly-specific disassembler options are supported for "
"use\n"
"with the -M switch:\n"
msgstr ""
#: xc16x-asm.c:65
msgid "Missing '#' prefix"
msgstr ""

521
opcodes/wasm32-dis.c Normal file
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@ -0,0 +1,521 @@
/* Opcode printing code for the WebAssembly target
Copyright (C) 2017 Free Software Foundation, Inc.
This file is part of libopcodes.
This library 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 of the License, or
(at your option) any later version.
It 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#include "sysdep.h"
#include "dis-asm.h"
#include "opintl.h"
#include "safe-ctype.h"
#include "floatformat.h"
#include <float.h>
#include "libiberty.h"
#include "elf-bfd.h"
#include "elf/internal.h"
#include "elf/wasm32.h"
#include <stdint.h>
/* 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
enum wasm_class
{
wasm_typed,
wasm_special,
wasm_break,
wasm_break_if,
wasm_break_table,
wasm_return,
wasm_call,
wasm_call_import,
wasm_call_indirect,
wasm_get_local,
wasm_set_local,
wasm_tee_local,
wasm_drop,
wasm_constant_i32,
wasm_constant_i64,
wasm_constant_f32,
wasm_constant_f64,
wasm_unary,
wasm_binary,
wasm_conv,
wasm_load,
wasm_store,
wasm_select,
wasm_relational,
wasm_eqz,
wasm_current_memory,
wasm_grow_memory,
wasm_signature
};
struct wasm32_private_data
{
bfd_boolean print_registers;
bfd_boolean print_well_known_globals;
/* Limit valid symbols to those with a given prefix. */
const char *section_prefix;
};
typedef struct
{
const char *name;
const char *description;
} wasm32_options_t;
static const wasm32_options_t options[] =
{
{ "registers", N_("Disassemble \"register\" names") },
{ "globals", N_("Name well-known globals") },
};
#define WASM_OPCODE(opcode, name, intype, outtype, clas, signedness) \
{ name, wasm_ ## clas, opcode },
struct wasm32_opcode_s
{
const char *name;
enum wasm_class clas;
unsigned char opcode;
} wasm32_opcodes[] =
{
#include "opcode/wasm.h"
{ NULL, 0, 0 }
};
/* Parse the disassembler options in OPTS and initialize INFO. */
static void
parse_wasm32_disassembler_options (struct disassemble_info *info,
const char *opts)
{
struct wasm32_private_data *private = info->private_data;
while (opts != NULL)
{
if (CONST_STRNEQ (opts, "registers"))
private->print_registers = TRUE;
else if (CONST_STRNEQ (opts, "globals"))
private->print_well_known_globals = TRUE;
opts = strchr (opts, ',');
if (opts)
opts++;
}
}
/* Check whether SYM is valid. Special-case absolute symbols, which
are unhelpful to print, and arguments to a "call" insn, which we
want to be in a section matching a given prefix. */
static bfd_boolean
wasm32_symbol_is_valid (asymbol *sym,
struct disassemble_info *info)
{
struct wasm32_private_data *private_data = info->private_data;
if (sym == NULL)
return FALSE;
if (strcmp(sym->section->name, "*ABS*") == 0)
return FALSE;
if (private_data && private_data->section_prefix != NULL
&& strncmp (sym->section->name, private_data->section_prefix,
strlen (private_data->section_prefix)))
return FALSE;
return TRUE;
}
/* Initialize the disassembler structures for INFO. */
void
disassemble_init_wasm32 (struct disassemble_info *info)
{
if (info->private_data == NULL)
{
static struct wasm32_private_data private;
private.print_registers = FALSE;
private.print_well_known_globals = FALSE;
private.section_prefix = NULL;
info->private_data = &private;
}
if (info->disassembler_options)
{
parse_wasm32_disassembler_options (info, info->disassembler_options);
info->disassembler_options = NULL;
}
info->symbol_is_valid = wasm32_symbol_is_valid;
}
/* Read an LEB128-encoded integer from INFO at address PC, reading one
byte at a time. Set ERROR_RETURN if no complete integer could be
read, LENGTH_RETURN to the number oof bytes read (including bytes
in incomplete numbers). SIGN means interpret the number as
SLEB128. Unfortunately, this is a duplicate of wasm-module.c's
wasm_read_leb128 (). */
static uint64_t
wasm_read_leb128 (bfd_vma pc,
struct disassemble_info * info,
bfd_boolean * error_return,
unsigned int * length_return,
bfd_boolean sign)
{
uint64_t result = 0;
unsigned int num_read = 0;
unsigned int shift = 0;
unsigned char byte = 0;
bfd_boolean success = FALSE;
while (info->read_memory_func (pc + num_read, &byte, 1, info) == 0)
{
num_read++;
result |= ((bfd_vma) (byte & 0x7f)) << shift;
shift += 7;
if ((byte & 0x80) == 0)
{
success = TRUE;
break;
}
}
if (length_return != NULL)
*length_return = num_read;
if (error_return != NULL)
*error_return = ! success;
if (sign && (shift < 8 * sizeof (result)) && (byte & 0x40))
result |= -((uint64_t) 1 << shift);
return result;
}
/* Read a 32-bit IEEE float from PC using INFO, convert it to a host
double, and store it at VALUE. */
static int
read_f32 (double *value, bfd_vma pc, struct disassemble_info *info)
{
bfd_byte buf[4];
if (info->read_memory_func (pc, buf, sizeof (buf), info))
return -1;
floatformat_to_double (&floatformat_ieee_single_little, buf,
value);
return sizeof (buf);
}
/* Read a 64-bit IEEE float from PC using INFO, convert it to a host
double, and store it at VALUE. */
static int
read_f64 (double *value, bfd_vma pc, struct disassemble_info *info)
{
bfd_byte buf[8];
if (info->read_memory_func (pc, buf, sizeof (buf), info))
return -1;
floatformat_to_double (&floatformat_ieee_double_little, buf,
value);
return sizeof (buf);
}
/* Main disassembly routine. Disassemble insn at PC using INFO. */
int
print_insn_wasm32 (bfd_vma pc, struct disassemble_info *info)
{
unsigned char opcode;
struct wasm32_opcode_s *op;
bfd_byte buffer[16];
void *stream = info->stream;
fprintf_ftype prin = info->fprintf_func;
struct wasm32_private_data *private_data = info->private_data;
long long constant = 0;
double fconstant = 0.0;
long flags = 0;
long offset = 0;
long depth = 0;
long index = 0;
long target_count = 0;
long block_type = 0;
int len = 1;
int ret = 0;
unsigned int bytes_read = 0;
int i;
const char *locals[] =
{
"$dpc", "$sp1", "$r0", "$r1", "$rpc", "$pc0",
"$rp", "$fp", "$sp",
"$r2", "$r3", "$r4", "$r5", "$r6", "$r7",
"$i0", "$i1", "$i2", "$i3", "$i4", "$i5", "$i6", "$i7",
"$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "$f6", "$f7",
};
int nlocals = ARRAY_SIZE (locals);
const char *globals[] =
{
"$got", "$plt", "$gpo"
};
int nglobals = ARRAY_SIZE (globals);
bfd_boolean error = FALSE;
if (info->read_memory_func (pc, buffer, 1, info))
return -1;
opcode = buffer[0];
for (op = wasm32_opcodes; op->name; op++)
if (op->opcode == opcode)
break;
if (!op->name)
{
prin (stream, "\t.byte 0x%02x\n", buffer[0]);
return 1;
}
else
{
len = 1;
prin (stream, "\t");
prin (stream, "%s", op->name);
if (op->clas == wasm_typed)
{
block_type = wasm_read_leb128
(pc + len, info, &error, &bytes_read, FALSE);
if (error)
return -1;
len += bytes_read;
switch (block_type)
{
case BLOCK_TYPE_NONE:
prin (stream, "[]");
break;
case BLOCK_TYPE_I32:
prin (stream, "[i]");
break;
case BLOCK_TYPE_I64:
prin (stream, "[l]");
break;
case BLOCK_TYPE_F32:
prin (stream, "[f]");
break;
case BLOCK_TYPE_F64:
prin (stream, "[d]");
break;
}
}
switch (op->clas)
{
case wasm_special:
case wasm_eqz:
case wasm_binary:
case wasm_unary:
case wasm_conv:
case wasm_relational:
case wasm_drop:
case wasm_signature:
case wasm_call_import:
case wasm_typed:
case wasm_select:
break;
case wasm_break_table:
target_count = wasm_read_leb128
(pc + len, info, &error, &bytes_read, FALSE);
if (error)
return -1;
len += bytes_read;
prin (stream, " %ld", target_count);
for (i = 0; i < target_count + 1; i++)
{
long target = 0;
target = wasm_read_leb128
(pc + len, info, &error, &bytes_read, FALSE);
if (error)
return -1;
len += bytes_read;
prin (stream, " %ld", target);
}
break;
case wasm_break:
case wasm_break_if:
depth = wasm_read_leb128
(pc + len, info, &error, &bytes_read, FALSE);
if (error)
return -1;
len += bytes_read;
prin (stream, " %ld", depth);
break;
case wasm_return:
break;
case wasm_constant_i32:
case wasm_constant_i64:
constant = wasm_read_leb128
(pc + len, info, &error, &bytes_read, TRUE);
if (error)
return -1;
len += bytes_read;
prin (stream, " %lld", constant);
break;
case wasm_constant_f32:
/* This appears to be the best we can do, even though we're
using host doubles for WebAssembly floats. */
ret = read_f32 (&fconstant, pc + len, info);
if (ret < 0)
return -1;
len += ret;
prin (stream, " %.*g", DECIMAL_DIG, fconstant);
break;
case wasm_constant_f64:
ret = read_f64 (&fconstant, pc + len, info);
if (ret < 0)
return -1;
len += ret;
prin (stream, " %.*g", DECIMAL_DIG, fconstant);
break;
case wasm_call:
index = wasm_read_leb128
(pc + len, info, &error, &bytes_read, FALSE);
if (error)
return -1;
len += bytes_read;
prin (stream, " ");
private_data->section_prefix = ".space.function_index";
(*info->print_address_func) ((bfd_vma) index, info);
private_data->section_prefix = NULL;
break;
case wasm_call_indirect:
constant = wasm_read_leb128
(pc + len, info, &error, &bytes_read, FALSE);
if (error)
return -1;
len += bytes_read;
prin (stream, " %lld", constant);
constant = wasm_read_leb128
(pc + len, info, &error, &bytes_read, FALSE);
if (error)
return -1;
len += bytes_read;
prin (stream, " %lld", constant);
break;
case wasm_get_local:
case wasm_set_local:
case wasm_tee_local:
constant = wasm_read_leb128
(pc + len, info, &error, &bytes_read, FALSE);
if (error)
return -1;
len += bytes_read;
prin (stream, " %lld", constant);
if (strcmp (op->name + 4, "local") == 0)
{
if (private_data->print_registers
&& constant >= 0 && constant < nlocals)
prin (stream, " <%s>", locals[constant]);
}
else
{
if (private_data->print_well_known_globals
&& constant >= 0 && constant < nglobals)
prin (stream, " <%s>", globals[constant]);
}
break;
case wasm_grow_memory:
case wasm_current_memory:
constant = wasm_read_leb128
(pc + len, info, &error, &bytes_read, FALSE);
if (error)
return -1;
len += bytes_read;
prin (stream, " %lld", constant);
break;
case wasm_load:
case wasm_store:
flags = wasm_read_leb128
(pc + len, info, &error, &bytes_read, FALSE);
if (error)
return -1;
len += bytes_read;
offset = wasm_read_leb128
(pc + len, info, &error, &bytes_read, FALSE);
if (error)
return -1;
len += bytes_read;
prin (stream, " a=%ld %ld", flags, offset);
}
}
return len;
}
/* Print valid disassembler options to STREAM. */
void
print_wasm32_disassembler_options (FILE *stream)
{
unsigned int i, max_len = 0;
fprintf (stream, _("\
The following WebAssembly-specific disassembler options are supported for use\n\
with the -M switch:\n"));
for (i = 0; i < ARRAY_SIZE (options); i++)
{
unsigned int len = strlen (options[i].name);
if (max_len < len)
max_len = len;
}
for (i = 0, max_len++; i < ARRAY_SIZE (options); i++)
fprintf (stream, " %s%*c %s\n",
options[i].name,
(int)(max_len - strlen (options[i].name)), ' ',
_(options[i].description));
}