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