x86: consolidate frame state manipulation functions

Rather than doing this in multiple places, have a single central
function (decode_register()) to be used by all other code.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>

1 files changed, 0 insertions, 28 deletions

diff --git a/xen/arch/x86/traps.c b/xen/arch/x86/traps.c
index 2ff88ade8e..de08e254ba 100644
--- a/xen/arch/x86/traps.c
+++ b/xen/arch/x86/traps.c
@@ -367,34 +367,6 @@ void vcpu_show_execution_state(struct vcpu *v)
     vcpu_unpause(v);
 }
 
-unsigned long *get_x86_gpr(struct cpu_user_regs *regs, unsigned int modrm_reg)
-{
-    void *p;
-
-    switch ( modrm_reg )
-    {
-    case  0: p = &regs->eax; break;
-    case  1: p = &regs->ecx; break;
-    case  2: p = &regs->edx; break;
-    case  3: p = &regs->ebx; break;
-    case  4: p = &regs->esp; break;
-    case  5: p = &regs->ebp; break;
-    case  6: p = &regs->esi; break;
-    case  7: p = &regs->edi; break;
-    case  8: p = &regs->r8;  break;
-    case  9: p = &regs->r9;  break;
-    case 10: p = &regs->r10; break;
-    case 11: p = &regs->r11; break;
-    case 12: p = &regs->r12; break;
-    case 13: p = &regs->r13; break;
-    case 14: p = &regs->r14; break;
-    case 15: p = &regs->r15; break;
-    default: p = NULL; break;
-    }
-
-    return p;
-}
-
 static char *trapstr(int trapnr)
 {
     static char *strings[] = {