arch/um/sys-x86_64/ptrace.c

   1 /*
   2  * Copyright 2003 PathScale, Inc.
   3  *
   4  * Licensed under the GPL
   5  */
   6
   7 #define __FRAME_OFFSETS
   8 #include "asm/ptrace.h"
   9 #include "linux/sched.h"
  10 #include "linux/errno.h"
  11 #include "asm/elf.h"
  12
  13 /* XXX x86_64 */
  14 unsigned long not_ss;
  15 unsigned long not_ds;
  16 unsigned long not_es;
  17
  18 #define SC_SS(r) (not_ss)
  19 #define SC_DS(r) (not_ds)
  20 #define SC_ES(r) (not_es)
  21
  22 /* determines which flags the user has access to. */
  23 /* 1 = access 0 = no access */
  24 #define FLAG_MASK 0x44dd5UL
  25
  26 int putreg(struct task_struct *child, int regno, unsigned long value)
  27 {
  28         unsigned long tmp;
  29
  30 #ifdef TIF_IA32
  31         /* Some code in the 64bit emulation may not be 64bit clean.
  32            Don't take any chances. */
  33         if (test_tsk_thread_flag(child, TIF_IA32))
  34                 value &= 0xffffffff;
  35 #endif
  36         switch (regno){
  37         case FS:
  38         case GS:
  39         case DS:
  40         case ES:
  41         case SS:
  42         case CS:
  43                 if (value && (value & 3) != 3)
  44                         return -EIO;
  45                 value &= 0xffff;
  46                 break;
  47
  48         case FS_BASE:
  49         case GS_BASE:
  50                 if (!((value >> 48) == 0 || (value >> 48) == 0xffff))
  51                         return -EIO;
  52                 break;
  53
  54         case EFLAGS:
  55                 value &= FLAG_MASK;
  56                 tmp = PT_REGS_EFLAGS(&child->thread.regs) & ~FLAG_MASK;
  57                 value |= tmp;
  58                 break;
  59         }
  60
  61         PT_REGS_SET(&child->thread.regs, regno, value);
  62         return 0;
  63 }
  64
  65 unsigned long getreg(struct task_struct *child, int regno)
  66 {
  67         unsigned long retval = ~0UL;
  68         switch (regno) {
  69         case FS:
  70         case GS:
  71         case DS:
  72         case ES:
  73         case SS:
  74         case CS:
  75                 retval = 0xffff;
  76                 /* fall through */
  77         default:
  78                 retval &= PT_REG(&child->thread.regs, regno);
  79 #ifdef TIF_IA32
  80                 if (test_tsk_thread_flag(child, TIF_IA32))
  81                         retval &= 0xffffffff;
  82 #endif
  83         }
  84         return retval;
  85 }
  86
  87 void arch_switch(void)
  88 {
  89 /* XXX
  90         printk("arch_switch\n");
  91 */
  92 }
  93
  94 int is_syscall(unsigned long addr)
  95 {
  96         panic("is_syscall");
  97 }
  98
  99 int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu )
 100 {
 101         panic("dump_fpu");
 102         return(1);
 103 }
 104
 105 int get_fpregs(unsigned long buf, struct task_struct *child)
 106 {
 107         panic("get_fpregs");
 108         return(0);
 109 }
 110
 111 int set_fpregs(unsigned long buf, struct task_struct *child)
 112 {
 113         panic("set_fpregs");
 114         return(0);
 115 }
 116
 117 int get_fpxregs(unsigned long buf, struct task_struct *tsk)
 118 {
 119         panic("get_fpxregs");
 120         return(0);
 121 }
 122
 123 int set_fpxregs(unsigned long buf, struct task_struct *tsk)
 124 {
 125         panic("set_fxpregs");
 126         return(0);
 127 }
 128
 129 /*
 130  * Overrides for Emacs so that we follow Linus's tabbing style.
 131  * Emacs will notice this stuff at the end of the file and automatically
 132  * adjust the settings for this buffer only.  This must remain at the end
 133  * of the file.
 134  * ---------------------------------------------------------------------------
 135  * Local variables:
 136  * c-file-style: "linux"
 137  * End:
 138  */