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Fix ubsan signed integer overflow

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IMO a fairly useless warning in this case, but technically correct.

	PR 18708
	* i386-dis.c (get64): Avoid signed integer overflow.
This commit is contained in:
Alan Modra 2015-07-23 12:41:38 +09:30
parent 510fac86d7
commit 070fe95d07
2 changed files with 8 additions and 3 deletions
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7
opcodes/ChangeLog
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@ -1,3 +1,8 @@
2015-07-23 Alan Modra <amodra@gmail.com>
PR 18708
* i386-dis.c (get64): Avoid signed integer overflow.
2015-07-22 Alexander Fomin <alexander.fomin@intel.com>
PR binutils/18631
@ -82,7 +87,7 @@
2015-06-19 Peter Bergner <bergner@vnet.ibm.com>
* ppc-dis.h (skip_optional_operands): Use ppc_optional_operand_value.
* ppc-dis.h (skip_optional_operands): Use ppc_optional_operand_value.
* ppc-opc.c (FXM4): Add non-zero optional value.
(TBR): Likewise.
(SXL): Likewise.

4
opcodes/i386-dis.c
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@ -15387,11 +15387,11 @@ get64 (void)
a = *codep++ & 0xff;
a |= (*codep++ & 0xff) << 8;
a |= (*codep++ & 0xff) << 16;
a |= (*codep++ & 0xff) << 24;
a |= (*codep++ & 0xffu) << 24;
b = *codep++ & 0xff;
b |= (*codep++ & 0xff) << 8;
b |= (*codep++ & 0xff) << 16;
b |= (*codep++ & 0xff) << 24;
b |= (*codep++ & 0xffu) << 24;
x = a + ((bfd_vma) b << 32);
#else
abort ();