include/asm-m68k/ptrace.h

   1 #ifndef _M68K_PTRACE_H
   2 #define _M68K_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/ppc/kernel/ptrace.c.
  18  */
  19
  20 #include <linux/config.h>
  21
  22 #ifndef __ASSEMBLY__
  23 #ifdef CONFIG_M68K64BRIDGE
  24 #define M68K_REG unsigned long /*long*/
  25 #else
  26 #define M68K_REG unsigned long
  27 #endif
  28 struct pt_regs {
  29         M68K_REG gpr[32];
  30         M68K_REG nip;
  31         M68K_REG msr;
  32         M68K_REG orig_gpr3;     /* Used for restarting system calls */
  33         M68K_REG ctr;
  34         M68K_REG link;
  35         M68K_REG xer;
  36         M68K_REG ccr;
  37         M68K_REG mq;            /* 601 only (not used at present) */
  38                                 /* Used on APUS to hold IPL value. */
  39         M68K_REG trap;          /* Reason for being here */
  40         M68K_REG dar;           /* Fault registers */
  41         M68K_REG dsisr;
  42         M68K_REG result;        /* Result of a system call */
  43 };
  44 #endif
  45
  46 #define STACK_FRAME_OVERHEAD    16      /* size of minimum stack frame */
  47
  48 /* Size of stack frame allocated when calling signal handler. */
  49 #define __SIGNAL_FRAMESIZE      64
  50
  51 #define instruction_pointer(regs) ((regs)->nip)
  52 #define user_mode(regs) (((regs)->msr & MSR_PR) != 0)
  53
  54 /*
  55  * Offsets used by 'ptrace' system call interface.
  56  * These can't be changed without breaking binary compatibility
  57  * with MkLinux, etc.
  58  */
  59 #define PT_R0   0
  60 #define PT_R1   1
  61 #define PT_R2   2
  62 #define PT_R3   3
  63 #define PT_R4   4
  64 #define PT_R5   5
  65 #define PT_R6   6
  66 #define PT_R7   7
  67 #define PT_R8   8
  68 #define PT_R9   9
  69 #define PT_R10  10
  70 #define PT_R11  11
  71 #define PT_R12  12
  72 #define PT_R13  13
  73 #define PT_R14  14
  74 #define PT_R15  15
  75 #define PT_R16  16
  76 #define PT_R17  17
  77 #define PT_R18  18
  78 #define PT_R19  19
  79 #define PT_R20  20
  80 #define PT_R21  21
  81 #define PT_R22  22
  82 #define PT_R23  23
  83 #define PT_R24  24
  84 #define PT_R25  25
  85 #define PT_R26  26
  86 #define PT_R27  27
  87 #define PT_R28  28
  88 #define PT_R29  29
  89 #define PT_R30  30
  90 #define PT_R31  31
  91
  92 #define PT_NIP  32
  93 #define PT_MSR  33
  94 #ifdef __KERNEL__
  95 #define PT_ORIG_R3 34
  96 #endif
  97 #define PT_CTR  35
  98 #define PT_LNK  36
  99 #define PT_XER  37
 100 #define PT_CCR  38
 101 #define PT_MQ   39
 102
 103 #define PT_FPR0 48      /* each FP reg occupies 2 slots in this space */
 104 #define PT_FPR31 (PT_FPR0 + 2*31)
 105 #define PT_FPSCR (PT_FPR0 + 2*32 + 1)
 106
 107 #endif