include/asm-x86/ptrace.h

   1 #ifndef _ASM_X86_PTRACE_H
   2 #define _ASM_X86_PTRACE_H
   3
   4 #include <linux/compiler.h>     /* For __user */
   5 #include <asm/ptrace-abi.h>
   6
   7 #ifndef __ASSEMBLY__
   8
   9 #ifdef __i386__
  10 /* this struct defines the way the registers are stored on the
  11    stack during a system call. */
  12
  13 #ifndef __KERNEL__
  14
  15 struct pt_regs {
  16         long ebx;
  17         long ecx;
  18         long edx;
  19         long esi;
  20         long edi;
  21         long ebp;
  22         long eax;
  23         int  xds;
  24         int  xes;
  25         int  xfs;
  26         /* int  gs; */
  27         long orig_eax;
  28         long eip;
  29         int  xcs;
  30         long eflags;
  31         long esp;
  32         int  xss;
  33 };
  34
  35 #else /* __KERNEL__ */
  36
  37 struct pt_regs {
  38         long bx;
  39         long cx;
  40         long dx;
  41         long si;
  42         long di;
  43         long bp;
  44         long ax;
  45         int  ds;
  46         int  es;
  47         int  fs;
  48         /* int  gs; */
  49         long orig_ax;
  50         long ip;
  51         int  cs;
  52         long flags;
  53         long sp;
  54         int  ss;
  55 };
  56
  57 #include <asm/vm86.h>
  58 #include <asm/segment.h>
  59
  60 struct task_struct;
  61 extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code);
  62
  63 /*
  64  * user_mode_vm(regs) determines whether a register set came from user mode.
  65  * This is true if V8086 mode was enabled OR if the register set was from
  66  * protected mode with RPL-3 CS value.  This tricky test checks that with
  67  * one comparison.  Many places in the kernel can bypass this full check
  68  * if they have already ruled out V8086 mode, so user_mode(regs) can be used.
  69  */
  70 static inline int user_mode(struct pt_regs *regs)
  71 {
  72         return (regs->cs & SEGMENT_RPL_MASK) == USER_RPL;
  73 }
  74 static inline int user_mode_vm(struct pt_regs *regs)
  75 {
  76         return ((regs->cs & SEGMENT_RPL_MASK) |
  77                 (regs->flags & VM_MASK)) >= USER_RPL;
  78 }
  79 static inline int v8086_mode(struct pt_regs *regs)
  80 {
  81         return (regs->flags & VM_MASK);
  82 }
  83
  84 #define instruction_pointer(regs) ((regs)->ip)
  85 #define frame_pointer(regs) ((regs)->bp)
  86 #define stack_pointer(regs) ((unsigned long)(regs))
  87 #define regs_return_value(regs) ((regs)->ax)
  88
  89 extern unsigned long profile_pc(struct pt_regs *regs);
  90 #endif /* __KERNEL__ */
  91
  92 #else /* __i386__ */
  93
  94 #ifndef __KERNEL__
  95
  96 struct pt_regs {
  97         unsigned long r15;
  98         unsigned long r14;
  99         unsigned long r13;
 100         unsigned long r12;
 101         unsigned long rbp;
 102         unsigned long rbx;
 103 /* arguments: non interrupts/non tracing syscalls only save upto here*/
 104         unsigned long r11;
 105         unsigned long r10;
 106         unsigned long r9;
 107         unsigned long r8;
 108         unsigned long rax;
 109         unsigned long rcx;
 110         unsigned long rdx;
 111         unsigned long rsi;
 112         unsigned long rdi;
 113         unsigned long orig_rax;
 114 /* end of arguments */
 115 /* cpu exception frame or undefined */
 116         unsigned long rip;
 117         unsigned long cs;
 118         unsigned long eflags;
 119         unsigned long rsp;
 120         unsigned long ss;
 121 /* top of stack page */
 122 };
 123
 124 #else /* __KERNEL__ */
 125
 126 struct pt_regs {
 127         unsigned long r15;
 128         unsigned long r14;
 129         unsigned long r13;
 130         unsigned long r12;
 131         unsigned long bp;
 132         unsigned long bx;
 133 /* arguments: non interrupts/non tracing syscalls only save upto here*/
 134         unsigned long r11;
 135         unsigned long r10;
 136         unsigned long r9;
 137         unsigned long r8;
 138         unsigned long ax;
 139         unsigned long cx;
 140         unsigned long dx;
 141         unsigned long si;
 142         unsigned long di;
 143         unsigned long orig_ax;
 144 /* end of arguments */
 145 /* cpu exception frame or undefined */
 146         unsigned long ip;
 147         unsigned long cs;
 148         unsigned long flags;
 149         unsigned long sp;
 150         unsigned long ss;
 151 /* top of stack page */
 152 };
 153
 154 #define user_mode(regs) (!!((regs)->cs & 3))
 155 #define user_mode_vm(regs) user_mode(regs)
 156 #define v8086_mode(regs) 0      /* No V86 mode support in long mode */
 157 #define instruction_pointer(regs) ((regs)->ip)
 158 #define frame_pointer(regs) ((regs)->bp)
 159 #define stack_pointer(regs) ((regs)->sp)
 160 #define regs_return_value(regs) ((regs)->ax)
 161
 162 extern unsigned long profile_pc(struct pt_regs *regs);
 163 void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
 164
 165 struct task_struct;
 166
 167 extern unsigned long ptrace_get_debugreg(struct task_struct *child, int n);
 168 extern int ptrace_set_debugreg(struct task_struct *child, int n, unsigned long);
 169
 170 extern unsigned long
 171 convert_rip_to_linear(struct task_struct *child, struct pt_regs *regs);
 172
 173 enum {
 174         EF_CF   = 0x00000001,
 175         EF_PF   = 0x00000004,
 176         EF_AF   = 0x00000010,
 177         EF_ZF   = 0x00000040,
 178         EF_SF   = 0x00000080,
 179         EF_TF   = 0x00000100,
 180         EF_IE   = 0x00000200,
 181         EF_DF   = 0x00000400,
 182         EF_OF   = 0x00000800,
 183         EF_IOPL = 0x00003000,
 184         EF_IOPL_RING0 = 0x00000000,
 185         EF_IOPL_RING1 = 0x00001000,
 186         EF_IOPL_RING2 = 0x00002000,
 187         EF_NT   = 0x00004000,   /* nested task */
 188         EF_RF   = 0x00010000,   /* resume */
 189         EF_VM   = 0x00020000,   /* virtual mode */
 190         EF_AC   = 0x00040000,   /* alignment */
 191         EF_VIF  = 0x00080000,   /* virtual interrupt */
 192         EF_VIP  = 0x00100000,   /* virtual interrupt pending */
 193         EF_ID   = 0x00200000,   /* id */
 194 };
 195 #endif /* __KERNEL__ */
 196 #endif /* !__i386__ */
 197
 198 #ifdef __KERNEL__
 199
 200 /*
 201  * These are defined as per linux/ptrace.h, which see.
 202  */
 203 #define arch_has_single_step()  (1)
 204 extern void user_enable_single_step(struct task_struct *);
 205 extern void user_disable_single_step(struct task_struct *);
 206
 207 extern void user_enable_block_step(struct task_struct *);
 208 #ifdef CONFIG_X86_DEBUGCTLMSR
 209 #define arch_has_block_step()   (1)
 210 #else
 211 #define arch_has_block_step()   (boot_cpu_data.x86 >= 6)
 212 #endif
 213
 214 struct user_desc;
 215 extern int do_get_thread_area(struct task_struct *p, int idx,
 216                               struct user_desc __user *info);
 217 extern int do_set_thread_area(struct task_struct *p, int idx,
 218                               struct user_desc __user *info, int can_allocate);
 219
 220 #endif /* __KERNEL__ */
 221
 222 #endif /* !__ASSEMBLY__ */
 223
 224 #endif