On Tue, Oct 17, 2006 at 05:27:23PM +0100, Keir Fraser wrote:
> > Possibly --divide should alter the semantics in this case too. It's
> > something I need to bring up on the binutils list, but in the meantime,
> > it seems like a bug we have to work around.
>
> Would 'rex64\' work on Solaris, then?
>
> We could provide an OS-specific macro for forcing rex64.
How about the below.
regards
john
# HG changeset patch
# User john.levon@xxxxxxx
# Date 1161103248 25200
# Node ID 4e217ea549122efcf2b6bba2c6aaf4b9581cac2f
# Parent e5a8b0d52d68be688de73101dfe44145158d0cff
Define REX64_PREFIX to account for assembler syntax differences on SVR4
targets.
Signed-off-by: John Levon <john.levon@xxxxxxx>
diff --git a/xen/arch/x86/i387.c b/xen/arch/x86/i387.c
--- a/xen/arch/x86/i387.c
+++ b/xen/arch/x86/i387.c
@@ -14,6 +14,7 @@
#include <asm/processor.h>
#include <asm/hvm/support.h>
#include <asm/i387.h>
+#include <asm/asm_defns.h>
void init_fpu(void)
{
@@ -45,7 +46,7 @@ void save_init_fpu(struct vcpu *v)
* mode that doesn't require extended registers.
*/
__asm__ __volatile__ (
- "rex64/fxsave (%1)"
+ REX64_PREFIX "fxsave (%1)"
: "=m" (*fpu_ctxt) : "cdaSDb" (fpu_ctxt) );
#endif
@@ -95,7 +96,7 @@ void restore_fpu(struct vcpu *v)
"1: fxrstor %0 \n"
#else /* __x86_64__ */
/* See above for why the operands/constraints are this way. */
- "1: rex64/fxrstor (%2) \n"
+ "1: " REX64_PREFIX "fxrstor (%2) \n"
#endif
".section .fixup,\"ax\" \n"
"2: push %%"__OP"ax \n"
diff --git a/xen/include/asm-x86/x86_64/asm_defns.h
b/xen/include/asm-x86/x86_64/asm_defns.h
--- a/xen/include/asm-x86/x86_64/asm_defns.h
+++ b/xen/include/asm-x86/x86_64/asm_defns.h
@@ -60,6 +60,12 @@
#define safe_swapgs \
"mfence; swapgs;"
+#ifdef __sun__
+#define REX64_PREFIX "rex64\\"
+#else
+#define REX64_PREFIX "rex64/"
+#endif
+
#define BUILD_SMP_INTERRUPT(x,v) XBUILD_SMP_INTERRUPT(x,v)
#define XBUILD_SMP_INTERRUPT(x,v) \
asmlinkage void x(void); \
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
Home