LXR linux/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
  13struct 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
  38struct task_struct;
  39extern 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 */
  48static inline int user_mode(struct pt_regs *regs)
  49{
  50        return (regs->xcs & SEGMENT_RPL_MASK) == USER_RPL;
  51}
  52static inline int user_mode_vm(struct pt_regs *regs)
  53{
  54        return ((regs->xcs & SEGMENT_RPL_MASK) | (regs->eflags & VM_MASK)) >= USER_RPL;
  55}
  56static 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
  66extern unsigned long profile_pc(struct pt_regs *regs);
  67#endif /* __KERNEL__ */
  68
  69#else /* __i386__ */
  70
  71struct 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
 108extern unsigned long profile_pc(struct pt_regs *regs);
 109void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
 110
 111struct task_struct;
 112
 113extern unsigned long
 114convert_rip_to_linear(struct task_struct *child, struct pt_regs *regs);
 115
 116enum {
 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
 143