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Handle prefixes before fwait

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0x9b (fwait) is both an instruction and an opcode prefix.  When 0x9b is
treated as an instruction, we need to handle any prefixes before it.
This patch handles it properly.

gas/testsuite/

	PR binutils/16891
	* gas/i386/opcode.s: Add test for fwait with prefix.
	* gas/i386/opcode-intel.d: Updated.
	* gas/i386/opcode-suffix.d: Likewise.
	* gas/i386/opcode.d: Likewise.

opcodes/

	PR binutils/16891
	* i386-dis.c (print_insn): Handle prefixes before fwait.
This commit is contained in:
H.J. Lu
2014-05-01 09:39:51 -07:00
parent f8c2a73c88
commit 86a80a50f2
7 changed files with 29 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
gas/testsuite/ChangeLog
View File

@ -1,3 +1,11 @@
2014-05-01 H.J. Lu <hongjiu.lu@intel.com>
PR binutils/16891
* gas/i386/opcode.s: Add test for fwait with prefix.
* gas/i386/opcode-intel.d: Updated.
* gas/i386/opcode-suffix.d: Likewise.
* gas/i386/opcode.d: Likewise.
2014-04-23 Will Newton <will.newton@linaro.org>
* gas/arm/backslash-at.d: Fix dump output regexps for

2
gas/testsuite/gas/i386/opcode-intel.d
View File

@ -592,4 +592,6 @@ Disassembly of section .text:
[ ]*[a-f0-9]+: 0f 4b 90 90 90 90 90 cmovnp edx,DWORD PTR \[eax-0x6f6f6f70\]
[ ]*[a-f0-9]+: 66 0f 4a 90 90 90 90 90 cmovp dx,WORD PTR \[eax-0x6f6f6f70\]
[ ]*[a-f0-9]+: 66 0f 4b 90 90 90 90 90 cmovnp dx,WORD PTR \[eax-0x6f6f6f70\]
[ ]*[a-f0-9]+: 26 9b [ ]*es fwait
[ ]*[a-f0-9]+: 9b [ ]*fwait
#pass

2
gas/testsuite/gas/i386/opcode-suffix.d
View File

@ -592,4 +592,6 @@ Disassembly of section .text:
[ ]*[a-f0-9]+: 0f 4b 90 90 90 90 90 cmovnpl -0x6f6f6f70\(%eax\),%edx
[ ]*[a-f0-9]+: 66 0f 4a 90 90 90 90 90 cmovpw -0x6f6f6f70\(%eax\),%dx
[ ]*[a-f0-9]+: 66 0f 4b 90 90 90 90 90 cmovnpw -0x6f6f6f70\(%eax\),%dx
[ ]*[a-f0-9]+: 26 9b [ ]*es fwait
[ ]*[a-f0-9]+: 9b [ ]*fwait
#pass

2
gas/testsuite/gas/i386/opcode.d
View File

@ -591,4 +591,6 @@ Disassembly of section .text:
[ ]*[a-f0-9]+: 0f 4b 90 90 90 90 90 cmovnp -0x6f6f6f70\(%eax\),%edx
[ ]*[a-f0-9]+: 66 0f 4a 90 90 90 90 90 cmovp -0x6f6f6f70\(%eax\),%dx
[ ]*[a-f0-9]+: 66 0f 4b 90 90 90 90 90 cmovnp -0x6f6f6f70\(%eax\),%dx
[ ]*[a-f0-9]+: 26 9b [ ]*es fwait
[ ]*[a-f0-9]+: 9b [ ]*fwait
#pass

3
gas/testsuite/gas/i386/opcode.s
View File

@ -589,3 +589,6 @@ foo:
cmovpo 0x90909090(%eax),%edx
cmovpe 0x90909090(%eax),%dx
cmovpo 0x90909090(%eax),%dx
es fwait
fwait

5
opcodes/ChangeLog
View File

@ -1,3 +1,8 @@
2014-05-01 H.J. Lu <hongjiu.lu@intel.com>
PR binutils/16891
* i386-dis.c (print_insn): Handle prefixes before fwait.
2014-04-26 Alan Modra <amodra@gmail.com>
* po/POTFILES.in: Regenerate.

8
opcodes/i386-dis.c
View File

@ -12548,8 +12548,14 @@ print_insn (bfd_vma pc, disassemble_info *info)
if (((prefixes & PREFIX_FWAIT)
&& ((*codep < 0xd8) || (*codep > 0xdf))))
{
/* Handle prefixes before fwait. */
for (i = 0;
i < (int) ARRAY_SIZE (all_prefixes) && all_prefixes[i];
i++)
(*info->fprintf_func) (info->stream, "%s ",
prefix_name (all_prefixes[i], sizeflag));
(*info->fprintf_func) (info->stream, "fwait");
return 1;
return i + 1;
}
if (*codep == 0x0f)