include/asm-ppc64/ptrace.h

   1 #ifndef _PPC64_PTRACE_H
   2 #define _PPC64_PTRACE_H
   3
   4 /*
   5  * Copyright (C) 2001 PPC64 Team, IBM Corp
   6  *
   7  * This struct defines the way the registers are stored on the
   8  * kernel stack during a system call or other kernel entry.
   9  *
  10  * this should only contain volatile regs
  11  * since we can keep non-volatile in the thread_struct
  12  * should set this up when only volatiles are saved
  13  * by intr code.
  14  *
  15  * Since this is going on the stack, *CARE MUST BE TAKEN* to insure
  16  * that the overall structure is a multiple of 16 bytes in length.
  17  *
  18  * Note that the offsets of the fields in this struct correspond with
  19  * the PT_* values below.  This simplifies arch/ppc64/kernel/ptrace.c.
  20  *
  21  * This program is free software; you can redistribute it and/or
  22  * modify it under the terms of the GNU General Public License
  23  * as published by the Free Software Foundation; either version
  24  * 2 of the License, or (at your option) any later version.
  25  */
  26
  27 #ifndef __ASSEMBLY__
  28
  29 struct pt_regs {
  30         unsigned long gpr[32];
  31         unsigned long nip;
  32         unsigned long msr;
  33         unsigned long orig_gpr3; /* Used for restarting system calls */
  34         unsigned long ctr;
  35         unsigned long link;
  36         unsigned long xer;
  37         unsigned long ccr;
  38         unsigned long softe;    /* Soft enabled/disabled */
  39         unsigned long trap;     /* Reason for being here */
  40         unsigned long dar;      /* Fault registers */
  41         unsigned long dsisr;
  42         unsigned long result;   /* Result of a system call */
  43 };
  44
  45 struct pt_regs32 {
  46         unsigned int gpr[32];
  47         unsigned int nip;
  48         unsigned int msr;
  49         unsigned int orig_gpr3; /* Used for restarting system calls */
  50         unsigned int ctr;
  51         unsigned int link;
  52         unsigned int xer;
  53         unsigned int ccr;
  54         unsigned int mq;        /* 601 only (not used at present) */
  55         unsigned int trap;      /* Reason for being here */
  56         unsigned int dar;       /* Fault registers */
  57         unsigned int dsisr;
  58         unsigned int result;    /* Result of a system call */
  59 };
  60
  61 #ifdef __KERNEL__
  62
  63 #define instruction_pointer(regs) ((regs)->nip)
  64
  65 #ifdef CONFIG_SMP
  66 extern unsigned long profile_pc(struct pt_regs *regs);
  67 #else
  68 #define profile_pc(regs) instruction_pointer(regs)
  69 #endif
  70
  71 #define user_mode(regs) ((((regs)->msr) >> MSR_PR_LG) & 0x1)
  72
  73 #define force_successful_syscall_return()   \
  74                 (current_thread_info()->syscall_noerror = 1)
  75
  76 /*
  77  * We use the least-significant bit of the trap field to indicate
  78  * whether we have saved the full set of registers, or only a
  79  * partial set.  A 1 there means the partial set.
  80  */
  81 #define FULL_REGS(regs)         (((regs)->trap & 1) == 0)
  82 #define TRAP(regs)              ((regs)->trap & ~0xF)
  83 #define CHECK_FULL_REGS(regs)   BUG_ON(regs->trap & 1)
  84
  85 #endif /* __KERNEL__ */
  86
  87 #endif /* __ASSEMBLY__ */
  88
  89 #define STACK_FRAME_OVERHEAD    112     /* size of minimum stack frame */
  90
  91 /* Size of dummy stack frame allocated when calling signal handler. */
  92 #define __SIGNAL_FRAMESIZE      128
  93 #define __SIGNAL_FRAMESIZE32    64
  94
  95 /*
  96  * Offsets used by 'ptrace' system call interface.
  97  */
  98 #define PT_R0   0
  99 #define PT_R1   1
 100 #define PT_R2   2
 101 #define PT_R3   3
 102 #define PT_R4   4
 103 #define PT_R5   5
 104 #define PT_R6   6
 105 #define PT_R7   7
 106 #define PT_R8   8
 107 #define PT_R9   9
 108 #define PT_R10  10
 109 #define PT_R11  11
 110 #define PT_R12  12
 111 #define PT_R13  13
 112 #define PT_R14  14
 113 #define PT_R15  15
 114 #define PT_R16  16
 115 #define PT_R17  17
 116 #define PT_R18  18
 117 #define PT_R19  19
 118 #define PT_R20  20
 119 #define PT_R21  21
 120 #define PT_R22  22
 121 #define PT_R23  23
 122 #define PT_R24  24
 123 #define PT_R25  25
 124 #define PT_R26  26
 125 #define PT_R27  27
 126 #define PT_R28  28
 127 #define PT_R29  29
 128 #define PT_R30  30
 129 #define PT_R31  31
 130
 131 #define PT_NIP  32
 132 #define PT_MSR  33
 133 #ifdef __KERNEL__
 134 #define PT_ORIG_R3 34
 135 #endif
 136 #define PT_CTR  35
 137 #define PT_LNK  36
 138 #define PT_XER  37
 139 #define PT_CCR  38
 140 #define PT_SOFTE 39
 141 #define PT_TRAP 40
 142 #define PT_DAR  41
 143 #define PT_DSISR 42
 144 #define PT_RESULT 43
 145
 146 #define PT_FPR0 48
 147
 148 /*
 149  * Kernel and userspace will both use this PT_FPSCR value.  32-bit apps will
 150  * have visibility to the asm-ppc/ptrace.h header instead of this one.
 151  */
 152 #define PT_FPSCR (PT_FPR0 + 32) /* each FP reg occupies 1 slot in 64-bit space */
 153
 154 #ifdef __KERNEL__
 155 #define PT_FPSCR32 (PT_FPR0 + 2*32 + 1) /* each FP reg occupies 2 32-bit userspace slots */
 156 #endif
 157
 158 #define PT_VR0 82       /* each Vector reg occupies 2 slots in 64-bit */
 159 #define PT_VSCR (PT_VR0 + 32*2 + 1)
 160 #define PT_VRSAVE (PT_VR0 + 33*2)
 161
 162 #ifdef __KERNEL__
 163 #define PT_VR0_32 164   /* each Vector reg occupies 4 slots in 32-bit */
 164 #define PT_VSCR_32 (PT_VR0 + 32*4 + 3)
 165 #define PT_VRSAVE_32 (PT_VR0 + 33*4)
 166 #endif
 167
 168 /*
 169  * Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go.
 170  * The transfer totals 34 quadword.  Quadwords 0-31 contain the
 171  * corresponding vector registers.  Quadword 32 contains the vscr as the
 172  * last word (offset 12) within that quadword.  Quadword 33 contains the
 173  * vrsave as the first word (offset 0) within the quadword.
 174  *
 175  * This definition of the VMX state is compatible with the current PPC32
 176  * ptrace interface.  This allows signal handling and ptrace to use the same
 177  * structures.  This also simplifies the implementation of a bi-arch
 178  * (combined (32- and 64-bit) gdb.
 179  */
 180 #define PTRACE_GETVRREGS        18
 181 #define PTRACE_SETVRREGS        19
 182
 183 /*
 184  * While we dont have 64bit book E processors, we need to reserve the
 185  * relevant ptrace calls for 32bit compatibility.
 186  */
 187 #if 0
 188 #define PTRACE_GETEVRREGS       20
 189 #define PTRACE_SETEVRREGS       21
 190 #endif
 191
 192 /*
 193  * Get or set a debug register. The first 16 are DABR registers and the
 194  * second 16 are IABR registers.
 195  */
 196 #define PTRACE_GET_DEBUGREG     25
 197 #define PTRACE_SET_DEBUGREG     26
 198
 199 /* Additional PTRACE requests implemented on PowerPC. */
 200 #define PPC_PTRACE_GETREGS      0x99    /* Get GPRs 0 - 31 */
 201 #define PPC_PTRACE_SETREGS      0x98    /* Set GPRs 0 - 31 */
 202 #define PPC_PTRACE_GETFPREGS    0x97    /* Get FPRs 0 - 31 */
 203 #define PPC_PTRACE_SETFPREGS    0x96    /* Set FPRs 0 - 31 */
 204
 205 /* Calls to trace a 64bit program from a 32bit program */
 206 #define PPC_PTRACE_PEEKTEXT_3264 0x95
 207 #define PPC_PTRACE_PEEKDATA_3264 0x94
 208 #define PPC_PTRACE_POKETEXT_3264 0x93
 209 #define PPC_PTRACE_POKEDATA_3264 0x92
 210 #define PPC_PTRACE_PEEKUSR_3264  0x91
 211 #define PPC_PTRACE_POKEUSR_3264  0x90
 212
 213 #endif /* _PPC64_PTRACE_H */