root/include/asm-mips/ptrace.h

/* */

INCLUDED FROM

   1 /*
   2  * linux/include/asm-mips/ptrace.h
   3  *
   4  * machine dependent structs and defines to help the user use
   5  * the ptrace system call.
   6  */
   7 #ifndef __ASM_MIPS_PTRACE_H
   8 #define __ASM_MIPS_PTRACE_H
   9 
  10 /*
  11  * use ptrace (3 or 6, pid, PT_EXCL, data); to read or write
  12  * the processes registers.
  13  *
  14  * This defines/structures correspond to the register layout on stack -
  15  * if the order here is changed, it needs to be updated in
  16  * arch/mips/fork.c:copy_process, asm/mips/signal.c:do_signal,
  17  * asm-mips/ptrace.c, include/asm-mips/ptrace.h.
  18  */
  19 
  20 #include <asm/stackframe.h>
  21 
  22 /*
  23  * This struct defines the way the registers are stored on the 
  24  * stack during a system call/exception. As usual the registers
  25  * k0/k1 aren't being saved.
  26  */
  27 struct pt_regs {
  28         /*
  29          * Pad bytes for argument save space on the stack
  30          */
  31         unsigned long pad0[FR_REG1/sizeof(unsigned long)];
  32 
  33         /*
  34          * saved main processor registers
  35          */
  36         long            reg1,  reg2,  reg3,  reg4,  reg5,  reg6,  reg7;
  37         long     reg8,  reg9, reg10, reg11, reg12, reg13, reg14, reg15;
  38         long    reg16, reg17, reg18, reg19, reg20, reg21, reg22, reg23;
  39         long    reg24, reg25,               reg28, reg29, reg30, reg31;
  40 
  41         /*
  42          * Saved special registers
  43          */
  44         long    lo;
  45         long    hi;
  46 
  47         /*
  48          * saved cp0 registers
  49          */
  50         unsigned long cp0_status;
  51         unsigned long cp0_epc;
  52         unsigned long cp0_cause;
  53 
  54         /*
  55          * Some goodies...
  56          */
  57         unsigned long interrupt;
  58         long orig_reg2;
  59 };
  60 
  61 /*
  62  * Does the process account for user or for system time?
  63  */
  64 #if defined (__R4000__)
  65 
  66 #define user_mode(regs) (!((regs)->cp0_status & 0x18))
  67 
  68 #else /* !defined (__R4000__) */
  69 
  70 #error "#define user_mode(regs) for R3000!"
  71 
  72 #endif /* !defined (__R4000__) */
  73 
  74 #endif /* __ASM_MIPS_PTRACE_H */

/* */