uml: stop saving process FP state

[mirror_ubuntu-artful-kernel.git] / arch / um / os-Linux / sys-i386 / registers.c

diff --git a/arch/um/os-Linux/sys-i386/registers.c b/arch/um/os-Linux/sys-i386/registers.c
index 79cd93c8c5ed62d08ebe0d1d99461e4f98105f1c..f171204caa4ec05c014fae9d19a20795ce519dc0 100644 (file)
--- a/arch/um/os-Linux/sys-i386/registers.c
+++ b/arch/um/os-Linux/sys-i386/registers.c
@@ -4,30 +4,10 @@
  */
 
 #include <errno.h>
-#include <string.h>
-#include "sysdep/ptrace_user.h"
-#include "sysdep/ptrace.h"
-#include "uml-config.h"
-#include "skas_ptregs.h"
-#include "registers.h"
+#include <sysdep/ptrace_user.h>
 #include "longjmp.h"
 #include "user.h"
 
-/* These are set once at boot time and not changed thereafter */
-
-static unsigned long exec_regs[HOST_FRAME_SIZE];
-static unsigned long exec_fp_regs[HOST_FP_SIZE];
-static unsigned long exec_fpx_regs[HOST_XFP_SIZE];
-static int have_fpx_regs = 1;
-
-void init_thread_registers(union uml_pt_regs *to)
-{
-       memcpy(to->skas.regs, exec_regs, sizeof(to->skas.regs));
-       memcpy(to->skas.fp, exec_fp_regs, sizeof(to->skas.fp));
-       if(have_fpx_regs)
-               memcpy(to->skas.xfp, exec_fpx_regs, sizeof(to->skas.xfp));
-}
-
 /* XXX These need to use [GS]ETFPXREGS and copy_sc_{to,from}_user_skas needs
  * to pass in a sufficiently large buffer
  */
@@ -45,91 +25,6 @@ int restore_fp_registers(int pid, unsigned long *fp_regs)
        return 0;
 }
 
-static int move_registers(int pid, int int_op, union uml_pt_regs *regs,
-                         int fp_op, unsigned long *fp_regs)
-{
-       if(ptrace(int_op, pid, 0, regs->skas.regs) < 0)
-               return -errno;
-
-       if(ptrace(fp_op, pid, 0, fp_regs) < 0)
-               return -errno;
-
-       return 0;
-}
-
-void save_registers(int pid, union uml_pt_regs *regs)
-{
-       unsigned long *fp_regs;
-       int err, fp_op;
-
-       if(have_fpx_regs){
-               fp_op = PTRACE_GETFPXREGS;
-               fp_regs = regs->skas.xfp;
-       }
-       else {
-               fp_op = PTRACE_GETFPREGS;
-               fp_regs = regs->skas.fp;
-       }
-
-       err = move_registers(pid, PTRACE_GETREGS, regs, fp_op, fp_regs);
-       if(err)
-               panic("save_registers - saving registers failed, errno = %d\n",
-                     -err);
-}
-
-void restore_registers(int pid, union uml_pt_regs *regs)
-{
-       unsigned long *fp_regs;
-       int err, fp_op;
-
-       if(have_fpx_regs){
-               fp_op = PTRACE_SETFPXREGS;
-               fp_regs = regs->skas.xfp;
-       }
-       else {
-               fp_op = PTRACE_SETFPREGS;
-               fp_regs = regs->skas.fp;
-       }
-
-       err = move_registers(pid, PTRACE_SETREGS, regs, fp_op, fp_regs);
-       if(err)
-               panic("restore_registers - saving registers failed, "
-                     "errno = %d\n", -err);
-}
-
-void init_registers(int pid)
-{
-       int err;
-
-       err = ptrace(PTRACE_GETREGS, pid, 0, exec_regs);
-       if(err)
-               panic("check_ptrace : PTRACE_GETREGS failed, errno = %d",
-                     errno);
-
-       errno = 0;
-       err = ptrace(PTRACE_GETFPXREGS, pid, 0, exec_fpx_regs);
-       if(!err)
-               return;
-       if(errno != EIO)
-               panic("check_ptrace : PTRACE_GETFPXREGS failed, errno = %d",
-                     errno);
-
-       have_fpx_regs = 0;
-
-       err = ptrace(PTRACE_GETFPREGS, pid, 0, exec_fp_regs);
-       if(err)
-               panic("check_ptrace : PTRACE_GETFPREGS failed, errno = %d",
-                     errno);
-}
-
-void get_safe_registers(unsigned long *regs, unsigned long *fp_regs)
-{
-       memcpy(regs, exec_regs, HOST_FRAME_SIZE * sizeof(unsigned long));
-       if(fp_regs != NULL)
-               memcpy(fp_regs, exec_fp_regs,
-                      HOST_FP_SIZE * sizeof(unsigned long));
-}
-
 unsigned long get_thread_reg(int reg, jmp_buf *buf)
 {
        switch(reg){