https://sourceware.org/bugzilla/show_bug.cgi?id=25516
Bug ID: 25516
Summary: gas no longer accepts sysenter/sysexit with no -m
flag.
Product: binutils
Version: 2.34
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: gas
Assignee: unassigned at sourceware dot org
Reporter: andy at omniosce dot org
Target Milestone: ---
Since upgrading to binutils 2.34, gas will no longer assemble a file in 64-bit
mode which contains sysenter/sysexit instructions. I understand that these are
not available in 64-bit mode on AMD, but the documentation says that it will
accept both ISAs unless specifically told otherwise via a flag:
-mamd64
-mintel64
This option specifies that the assembler should accept only AMD64
or Intel64 ISA in 64-bit mode. The default is to accept both.
% cat l.s
.text
sysenter
% gas -v l.s
GNU assembler version 2.34 (x86_64-pc-solaris2.11) using BFD version (GNU
Binutils) 2.34
l.s: Assembler messages:
l.s:2: Error: unsupported instruction `sysenter'
% gas -mintel64 l.s
%
% gas -mamd64 l.s
l.s: Assembler messages:
l.s:2: Error: unsupported instruction `sysenter'
Expected results:
gas should produce the error only with -mamd64 and not with -mintel64 and not
without a specific target ISA parameter.
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