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 struct pt_regs {
  14         long ebx;
  15         long ecx;
  16         long edx;
  17         long esi;
  18         long edi;
  19         long ebp;
  20         long eax;
  21         int  xds;
  22         int  xes;
  23         int  xfs;
  24         /* int  xgs; */
  25         long orig_eax;
  26         long eip;
  27         int  xcs;
  28         long eflags;
  29         long esp;
  30         int  xss;
  31 };
  32
  33 #ifdef __KERNEL__
  34
  35 #include <asm/vm86.h>
  36 #include <asm/segment.h>
  37
  38 struct task_struct;
  39 extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code);
  40
  41 /*
  42  * user_mode_vm(regs) determines whether a register set came from user mode.
  43  * This is true if V8086 mode was enabled OR if the register set was from
  44  * protected mode with RPL-3 CS value.  This tricky test checks that with
  45  * one comparison.  Many places in the kernel can bypass this full check
  46  * if they have already ruled out V8086 mode, so user_mode(regs) can be used.
  47  */
  48 static inline int user_mode(struct pt_regs *regs)
  49 {
  50         return (regs->xcs & SEGMENT_RPL_MASK) == USER_RPL;
  51 }
  52 static inline int user_mode_vm(struct pt_regs *regs)
  53 {
  54         return ((regs->xcs & SEGMENT_RPL_MASK) | (regs->eflags & VM_MASK)) >= USER_RPL;
  55 }
  56 static inline int v8086_mode(struct pt_regs *regs)
  57 {
  58         return (regs->eflags & VM_MASK);
  59 }
  60
  61 #define instruction_pointer(regs) ((regs)->eip)
  62 #define frame_pointer(regs) ((regs)->ebp)
  63 #define stack_pointer(regs) ((unsigned long)(regs))
  64 #define regs_return_value(regs) ((regs)->eax)
  65
  66 extern unsigned long profile_pc(struct pt_regs *regs);
  67 #endif /* __KERNEL__ */
  68
  69 #else /* __i386__ */
  70
  71 struct pt_regs {
  72         unsigned long r15;
  73         unsigned long r14;
  74         unsigned long r13;
  75         unsigned long r12;
  76         unsigned long rbp;
  77         unsigned long rbx;
  78 /* arguments: non interrupts/non tracing syscalls only save upto here*/
  79         unsigned long r11;
  80         unsigned long r10;
  81         unsigned long r9;
  82         unsigned long r8;
  83         unsigned long rax;
  84         unsigned long rcx;
  85         unsigned long rdx;
  86         unsigned long rsi;
  87         unsigned long rdi;
  88         unsigned long orig_rax;
  89 /* end of arguments */
  90 /* cpu exception frame or undefined */
  91         unsigned long rip;
  92         unsigned long cs;
  93         unsigned long eflags;
  94         unsigned long rsp;
  95         unsigned long ss;
  96 /* top of stack page */
  97 };
  98
  99 #ifdef __KERNEL__
 100
 101 #define user_mode(regs) (!!((regs)->cs & 3))
 102 #define user_mode_vm(regs) user_mode(regs)
 103 #define instruction_pointer(regs) ((regs)->rip)
 104 #define frame_pointer(regs) ((regs)->rbp)
 105 #define stack_pointer(regs) ((regs)->rsp)
 106 #define regs_return_value(regs) ((regs)->rax)
 107
 108 extern unsigned long profile_pc(struct pt_regs *regs);
 109 void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
 110
 111 struct task_struct;
 112
 113 extern unsigned long
 114 convert_rip_to_linear(struct task_struct *child, struct pt_regs *regs);
 115
 116 enum {
 117         EF_CF   = 0x00000001,
 118         EF_PF   = 0x00000004,
 119         EF_AF   = 0x00000010,
 120         EF_ZF   = 0x00000040,
 121         EF_SF   = 0x00000080,
 122         EF_TF   = 0x00000100,
 123         EF_IE   = 0x00000200,
 124         EF_DF   = 0x00000400,
 125         EF_OF   = 0x00000800,
 126         EF_IOPL = 0x00003000,
 127         EF_IOPL_RING0 = 0x00000000,
 128         EF_IOPL_RING1 = 0x00001000,
 129         EF_IOPL_RING2 = 0x00002000,
 130         EF_NT   = 0x00004000,   /* nested task */
 131         EF_RF   = 0x00010000,   /* resume */
 132         EF_VM   = 0x00020000,   /* virtual mode */
 133         EF_AC   = 0x00040000,   /* alignment */
 134         EF_VIF  = 0x00080000,   /* virtual interrupt */
 135         EF_VIP  = 0x00100000,   /* virtual interrupt pending */
 136         EF_ID   = 0x00200000,   /* id */
 137 };
 138 #endif /* __KERNEL__ */
 139 #endif /* !__i386__ */
 140 #endif /* !__ASSEMBLY__ */
 141
 142 #endif