LXR uboot/arch/powerpc/include/asm/ptrace.h

   1#ifndef _PPC_PTRACE_H
   2#define _PPC_PTRACE_H
   3
   4/*
   5 * This struct defines the way the registers are stored on the
   6 * kernel stack during a system call or other kernel entry.
   7 *
   8 * this should only contain volatile regs
   9 * since we can keep non-volatile in the thread_struct
  10 * should set this up when only volatiles are saved
  11 * by intr code.
  12 *
  13 * Since this is going on the stack, *CARE MUST BE TAKEN* to insure
  14 * that the overall structure is a multiple of 16 bytes in length.
  15 *
  16 * Note that the offsets of the fields in this struct correspond with
  17 * the PT_* values below.  This simplifies arch/powerpc/kernel/ptrace.c.
  18 */
  19
  20#ifndef __ASSEMBLY__
  21#ifdef CONFIG_PPC64BRIDGE
  22#define PPC_REG unsigned long /*long*/
  23#else
  24#define PPC_REG unsigned long
  25#endif
  26struct pt_regs {
  27        PPC_REG gpr[32];
  28        PPC_REG nip;
  29        PPC_REG msr;
  30        PPC_REG orig_gpr3;      /* Used for restarting system calls */
  31        PPC_REG ctr;
  32        PPC_REG link;
  33        PPC_REG xer;
  34        PPC_REG ccr;
  35        PPC_REG mq;             /* 601 only (not used at present) */
  36                                /* Used on APUS to hold IPL value. */
  37        PPC_REG trap;           /* Reason for being here */
  38        PPC_REG dar;            /* Fault registers */
  39        PPC_REG dsisr;
  40        PPC_REG result;         /* Result of a system call */
  41};
  42#endif
  43
  44#define STACK_FRAME_OVERHEAD    16      /* size of minimum stack frame */
  45
  46/* Size of stack frame allocated when calling signal handler. */
  47#define __SIGNAL_FRAMESIZE      64
  48
  49#define instruction_pointer(regs) ((regs)->nip)
  50#define user_mode(regs) (((regs)->msr & MSR_PR) != 0)
  51
  52/*
  53 * Offsets used by 'ptrace' system call interface.
  54 * These can't be changed without breaking binary compatibility
  55 * with MkLinux, etc.
  56 */
  57#define PT_R0   0
  58#define PT_R1   1
  59#define PT_R2   2
  60#define PT_R3   3
  61#define PT_R4   4
  62#define PT_R5   5
  63#define PT_R6   6
  64#define PT_R7   7
  65#define PT_R8   8
  66#define PT_R9   9
  67#define PT_R10  10
  68#define PT_R11  11
  69#define PT_R12  12
  70#define PT_R13  13
  71#define PT_R14  14
  72#define PT_R15  15
  73#define PT_R16  16
  74#define PT_R17  17
  75#define PT_R18  18
  76#define PT_R19  19
  77#define PT_R20  20
  78#define PT_R21  21
  79#define PT_R22  22
  80#define PT_R23  23
  81#define PT_R24  24
  82#define PT_R25  25
  83#define PT_R26  26
  84#define PT_R27  27
  85#define PT_R28  28
  86#define PT_R29  29
  87#define PT_R30  30
  88#define PT_R31  31
  89
  90#define PT_NIP  32
  91#define PT_MSR  33
  92#ifdef __KERNEL__
  93#define PT_ORIG_R3 34
  94#endif
  95#define PT_CTR  35
  96#define PT_LNK  36
  97#define PT_XER  37
  98#define PT_CCR  38
  99#define PT_MQ   39
 100
 101#define PT_FPR0 48      /* each FP reg occupies 2 slots in this space */
 102#define PT_FPR31 (PT_FPR0 + 2*31)
 103#define PT_FPSCR (PT_FPR0 + 2*32 + 1)
 104
 105#endif
 106