https://sourceware.org/bugzilla/show_bug.cgi?id=19661
Bug ID: 19661
Summary: [libopcodes] [x86] Lock prefixes are allowed even when
they SIGILL
Product: binutils
Version: 2.27 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: njholcomb at wi dot rr.com
Target Milestone: ---
Lock prefixes are also allowed even when they cause an Illegal Instruction
signal. Lock prefixes should require a memory operand, but libopcodes will
produce code like:
lock mov bh, 0x9f
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