Linux0.96c/include/sys/ptrace.h

/* ptrace.h */
/* structs and defines to help the user use the ptrace system call. */

#ifndef _SYS_PTRACE_H
#define _SYS_PTRACE_H
/* has the defines to get at the registers. */

#define PTRACE_TRACEME		   0
#define PTRACE_PEEKTEXT		   1
#define PTRACE_PEEKDATA		   2
#define PTRACE_PEEKUSR		   3
#define PTRACE_POKETEXT		   4
#define PTRACE_POKEDATA		   5
#define PTRACE_POKEUSR		   6
#define PTRACE_CONT		   7
#define PTRACE_KILL		   8
#define PTRACE_SINGLESTEP	   9

#define PTRACE_ATTACH		0x10
#define PTRACE_DETACH		0x11

/* use ptrace (3 or 6, pid, PT_EXCL, data); to read or write
   the processes registers. */

#define EBX 0
#define ECX 1
#define EDX 2
#define ESI 3
#define EDI 4
#define EBP 5
#define EAX 6
#define DS 7
#define ES 8
#define FS 9
#define GS 10
#define ORIG_EAX 11
#define EIP 12
#define CS  13
#define EFL 14
#define UESP 15
#define SS   16


/* this struct defines the way the registers are stored on the 
   stack during a system call. */

struct pt_regs {
  long ebx;
  long ecx;
  long edx;
  long esi;
  long edi;
  long ebp;
  long eax;
  long ds;
  long es;
  long fs;
  long gs;
  long orig_eax;
  long eip;
  long cs;
  long eflags;
  long esp;
  long ss;
};

#endif /* _SYS_PTRACE_H */