[PATCH 3/5] hvmloader/tests: use .code64 in 64bit snippets

[Andrew Cooper <andrew.cooper3@citrix.com>]

No functional change, but makes the code rather more legible.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
CC: Keir Fraser <keir@xen.org>
CC: Jan Beulich <JBeulich@suse.com>
CC: Tim Deegan <tim@xen.org>
CC: Ian Campbell <Ian.Campbell@citrix.com>
CC: Ian Jackson <Ian.Jackson@eu.citrix.com>
---
 tools/firmware/hvmloader/tests.c |   10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/tools/firmware/hvmloader/tests.c b/tools/firmware/hvmloader/tests.c
index 52772aa..37d16f8 100644
--- a/tools/firmware/hvmloader/tests.c
+++ b/tools/firmware/hvmloader/tests.c
@@ -170,12 +170,14 @@ static int shadow_gs_test(void)
         /* Push LRETQ stack frame. */
         "pushl $0; pushl $"STR(SEL_CODE32)"; pushl $0; pushl $2f; "
         /* Jump to 64-bit mode. */
-        "ljmp $"STR(SEL_CODE64)",$1f; 1: "
+        "ljmp $"STR(SEL_CODE64)",$1f; "
+        ".code64; 1: "
         /* Swap GS_BASE and SHADOW_GS_BASE */
-        ".byte 0x0f,0x01,0xf8; " /* SWAPGS */
+        "swapgs; "
         /* Jump to 32-bit mode. */
-        ".byte 0x89, 0xe4; "     /* MOV ESP,ESP */
-        ".byte 0x48, 0xcb; 2: "  /* LRETQ */
+        "movl %%esp,%%esp; "
+        "lretq; "
+        ".code32; 2:"
         /* Read SHADOW_GS_BASE: should now contain 2 */
         "mov $0xc0000102,%%ecx; rdmsr; mov %%eax,%%ebx; "
         /* CR0.PG=0 */
-- 
1.7.10.4