linux 2.6.16.38 w/ vs2.0.3-rc1

[linux-2.6.git] / arch / um / sys-i386 / ptrace.c

diff --git a/arch/um/sys-i386/ptrace.c b/arch/um/sys-i386/ptrace.c
index 28bf011..e839ce6 100644 (file)
--- a/arch/um/sys-i386/ptrace.c
+++ b/arch/um/sys-i386/ptrace.c
@@ -3,9 +3,9 @@
  * Licensed under the GPL
  */
 
+#include <linux/config.h>
 #include <linux/compiler.h>
 #include "linux/sched.h"
-#include "linux/mm.h"
 #include "asm/elf.h"
 #include "asm/ptrace.h"
 #include "asm/uaccess.h"
@@ -14,22 +14,9 @@
 #include "sysdep/sigcontext.h"
 #include "sysdep/sc.h"
 
-void arch_switch_to_tt(struct task_struct *from, struct task_struct *to)
+void arch_switch(void)
 {
-       update_debugregs(to->thread.arch.debugregs_seq);
-       arch_switch_tls_tt(from, to);
-}
-
-void arch_switch_to_skas(struct task_struct *from, struct task_struct *to)
-{
-       int err = arch_switch_tls_skas(from, to);
-       if (!err)
-               return;
-
-       if (err != -EINVAL)
-               printk(KERN_WARNING "arch_switch_tls_skas failed, errno %d, not EINVAL\n", -err);
-       else
-               printk(KERN_WARNING "arch_switch_tls_skas failed, errno = EINVAL\n");
+       update_debugregs(current->thread.arch.debugregs_seq);
 }
 
 int is_syscall(unsigned long addr)
@@ -39,17 +26,9 @@ int is_syscall(unsigned long addr)
 
        n = copy_from_user(&instr, (void __user *) addr, sizeof(instr));
        if(n){
-               /* access_process_vm() grants access to vsyscall and stub,
-                * while copy_from_user doesn't. Maybe access_process_vm is
-                * slow, but that doesn't matter, since it will be called only
-                * in case of singlestepping, if copy_from_user failed.
-                */
-               n = access_process_vm(current, addr, &instr, sizeof(instr), 0);
-               if(n != sizeof(instr)) {
-                       printk("is_syscall : failed to read instruction from "
-                              "0x%lx\n", addr);
-                       return(1);
-               }
+               printk("is_syscall : failed to read instruction from 0x%lx\n",
+                      addr);
+               return(0);
        }
        /* int 0x80 or sysenter */
        return((instr == 0x80cd) || (instr == 0x340f));
@@ -136,22 +115,22 @@ unsigned long getreg(struct task_struct *child, int regno)
 int peek_user(struct task_struct *child, long addr, long data)
 {
 /* read the word at location addr in the USER area. */
-       unsigned long tmp;
+        unsigned long tmp;
 
-       if ((addr & 3) || addr < 0)
-               return -EIO;
+        if ((addr & 3) || addr < 0)
+                return -EIO;
 
-       tmp = 0;  /* Default return condition */
-       if(addr < MAX_REG_OFFSET){
-               tmp = getreg(child, addr);
-       }
-       else if((addr >= offsetof(struct user, u_debugreg[0])) &&
-               (addr <= offsetof(struct user, u_debugreg[7]))){
-               addr -= offsetof(struct user, u_debugreg[0]);
-               addr = addr >> 2;
-               tmp = child->thread.arch.debugregs[addr];
-       }
-       return put_user(tmp, (unsigned long __user *) data);
+        tmp = 0;  /* Default return condition */
+        if(addr < MAX_REG_OFFSET){
+                tmp = getreg(child, addr);
+        }
+        else if((addr >= offsetof(struct user, u_debugreg[0])) &&
+                (addr <= offsetof(struct user, u_debugreg[7]))){
+                addr -= offsetof(struct user, u_debugreg[0]);
+                addr = addr >> 2;
+                tmp = child->thread.arch.debugregs[addr];
+        }
+        return put_user(tmp, (unsigned long *) data);
 }
 
 struct i387_fxsave_struct {