#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"
#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)
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));
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 {