https://sourceware.org/bugzilla/show_bug.cgi?id=20838
Bug ID: 20838
Summary: Strange disassembly for 4d in x86-64 mode
Product: binutils
Version: 2.27
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: jamesmikedupont at googlemail dot com
Target Milestone: ---
GNU objdump (GNU Binutils for Debian) 2.27.51.20161108
The disam seems to skip the first byte if presented with another op afterwards.
please let me know if this is a bug or intended behavior.
Input to as :
.test16:
.byte 77
.byte 0
.byte 1
.byte 1
.byte 1
.byte 1
.test17:
.byte 77
.byte 1
.byte 0
.byte 0
.byte 0
.byte 0
Output of objdump :
000000000000005a <.test16>:
5a: 4d 00 01 rex.WRB add %r8b,(%r9)
5d: 01 01 add %eax,(%rcx)
5f: 01 .byte 0x1
0000000000000060 <.test17>:
60: 4d 01 00 add %r8,(%r8)
63: 00 00 add %al,(%rax)
Next test :
.test17:
.byte 77
.byte 1
.test17b:
.byte 77
.byte 1
.byte 0
.test17c:
.byte 77
.byte 1
.byte 1
output :
Disassembly of section .text:
0000000000000000 <.test17>:
0: 4d rex.WRB
1: 01 .byte 0x1
0000000000000002 <.test17b>:
2: 4d 01 00 add %r8,(%r8)
0000000000000005 <.test17c>:
5: 4d 01 01 add %r8,(%r9)
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