> Date: Wed, 15 Mar 2017 16:23:33 -0700 > From: Mike Larkin <mlar...@azathoth.net> > > On Wed, Mar 15, 2017 at 09:05:56PM +0100, Mark Kettenis wrote: > > Clang only accepts SVM instructions with explicit operands, for > > example: > > > > vmload %rax > > > > Unfortunately gas doesn't accept this form. It does accept the > > instruction without any operands: > > > > vmload > > > > and the incorrect form: > > > > vmload (%rax) > > > > The diff below fixes this. > > > > Slight flaw with this diff is that it will also accept the incorrect > > > > vmload %rbx > > > > which will be silently translated into > > > > vmload %rax > > > > But I don't think that is a huge issue. > > > > ok? > > > > If the svm bits in the tree still build, sure. > > I had planned to change this to a #define like other OSes do but > this fix is just as good. no complaints from me.
Still builds and produces the same instructions. > > Index: gnu/usr.bin/binutils-2.17/include/opcode/i386.h > > =================================================================== > > RCS file: /cvs/src/gnu/usr.bin/binutils-2.17/include/opcode/i386.h,v > > retrieving revision 1.9 > > diff -u -p -r1.9 i386.h > > --- gnu/usr.bin/binutils-2.17/include/opcode/i386.h 21 Dec 2015 20:56:22 > > -0000 1.9 > > +++ gnu/usr.bin/binutils-2.17/include/opcode/i386.h 15 Mar 2017 19:59:40 > > -0000 > > @@ -1464,17 +1464,21 @@ static const template i386_optab[] = > > {"clgi", 0, 0x0f01, 0xdd, CpuSVME, NoSuf|ImmExt, { 0, 0, > > 0 } }, > > {"invlpga", 0, 0x0f01, 0xdf, CpuSVME, NoSuf|ImmExt, { 0, 0, > > 0 } }, > > /* Need to ensure only "invlpga ...,%ecx" is accepted. */ > > -{"invlpga", 2, 0x0f01, 0xdf, CpuSVME, NoSuf|ImmExt, { > > AnyMem, Reg32, 0 } }, > > +{"invlpga", 2, 0x0f01, 0xdf, CpuSVME|CpuNo64, NoSuf|ImmExt, { > > Reg32, Reg32, 0 } }, > > +{"invlpga", 2, 0x0f01, 0xdf, CpuSVME|Cpu64, NoSuf|ImmExt|NoRex64, { > > Reg64, Reg32, 0 } }, > > {"skinit", 0, 0x0f01, 0xde, CpuSVME, NoSuf|ImmExt, { 0, 0, > > 0 } }, > > -{"skinit", 1, 0x0f01, 0xde, CpuSVME, NoSuf|ImmExt, { > > AnyMem, 0, 0 } }, > > +{"skinit", 1, 0x0f01, 0xde, CpuSVME, NoSuf|ImmExt, { > > Reg32, 0, 0 } }, > > {"stgi", 0, 0x0f01, 0xdc, CpuSVME, NoSuf|ImmExt, { 0, 0, > > 0 } }, > > {"vmload", 0, 0x0f01, 0xda, CpuSVME, NoSuf|ImmExt, { 0, 0, > > 0 } }, > > -{"vmload", 1, 0x0f01, 0xda, CpuSVME, NoSuf|ImmExt, { > > AnyMem, 0, 0 } }, > > +{"vmload", 1, 0x0f01, 0xda, CpuSVME|CpuNo64, NoSuf|ImmExt, { > > Reg32, 0, 0 } }, > > +{"vmload", 1, 0x0f01, 0xda, CpuSVME|Cpu64, NoSuf|ImmExt|NoRex64, { > > Reg64, 0, 0 } }, > > {"vmmcall", 0, 0x0f01, 0xd9, CpuSVME, NoSuf|ImmExt, { 0, 0, > > 0 } }, > > {"vmrun", 0, 0x0f01, 0xd8, CpuSVME, NoSuf|ImmExt, { 0, 0, > > 0 } }, > > -{"vmrun", 1, 0x0f01, 0xd8, CpuSVME, NoSuf|ImmExt, { > > AnyMem, 0, 0 } }, > > +{"vmrun", 1, 0x0f01, 0xd8, CpuSVME|CpuNo64, NoSuf|ImmExt, { > > Reg32, 0, 0 } }, > > +{"vmrun", 1, 0x0f01, 0xd8, CpuSVME|Cpu64, NoSuf|ImmExt|NoRex64, { > > Reg64, 0, 0 } }, > > {"vmsave", 0, 0x0f01, 0xdb, CpuSVME, NoSuf|ImmExt, { 0, 0, > > 0 } }, > > -{"vmsave", 1, 0x0f01, 0xdb, CpuSVME, NoSuf|ImmExt, { > > AnyMem, 0, 0 } }, > > +{"vmsave", 1, 0x0f01, 0xdb, CpuSVME|CpuNo64, NoSuf|ImmExt, { > > Reg32, 0, 0 } }, > > +{"vmsave", 1, 0x0f01, 0xdb, CpuSVME|Cpu64, NoSuf|ImmExt|NoRex64, { > > Reg64, 0, 0 } }, > > > > /* VIA PadLock extensions. */ > > {"xstore-rng",0, 0x000fa7, 0xc0, Cpu686|CpuPadLock, NoSuf|IsString|ImmExt, > > { 0, 0, 0} }, > > > > > > >