linux/arch/ia64/include/uapi/asm/ptrace.h
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   1/*
   2 * Copyright (C) 1998-2004 Hewlett-Packard Co
   3 *      David Mosberger-Tang <davidm@hpl.hp.com>
   4 *      Stephane Eranian <eranian@hpl.hp.com>
   5 * Copyright (C) 2003 Intel Co
   6 *      Suresh Siddha <suresh.b.siddha@intel.com>
   7 *      Fenghua Yu <fenghua.yu@intel.com>
   8 *      Arun Sharma <arun.sharma@intel.com>
   9 *
  10 * 12/07/98     S. Eranian      added pt_regs & switch_stack
  11 * 12/21/98     D. Mosberger    updated to match latest code
  12 *  6/17/99     D. Mosberger    added second unat member to "struct switch_stack"
  13 *
  14 */
  15#ifndef _UAPI_ASM_IA64_PTRACE_H
  16#define _UAPI_ASM_IA64_PTRACE_H
  17
  18/*
  19 * When a user process is blocked, its state looks as follows:
  20 *
  21 *            +----------------------+  ------- IA64_STK_OFFSET
  22 *            |                      |   ^
  23 *            | struct pt_regs       |   |
  24 *            |                      |   |
  25 *            +----------------------+   |
  26 *            |                      |   |
  27 *            |    memory stack      |   |
  28 *            | (growing downwards)  |   |
  29 *            //.....................//  |
  30 *                                       |
  31 *            //.....................//  |
  32 *            |                      |   |
  33 *            +----------------------+   |
  34 *            | struct switch_stack  |   |
  35 *            |                      |   |
  36 *            +----------------------+   |
  37 *            |                      |   |
  38 *            //.....................//  |
  39 *                                       |
  40 *            //.....................//  |
  41 *            |                      |   |
  42 *            |  register stack      |   |
  43 *            | (growing upwards)    |   |
  44 *            |                      |   |
  45 *            +----------------------+   |  --- IA64_RBS_OFFSET
  46 *            |  struct thread_info  |   |  ^
  47 *            +----------------------+   |  |
  48 *            |                      |   |  |
  49 *            |  struct task_struct  |   |  |
  50 * current -> |                      |   |  |
  51 *            +----------------------+ -------
  52 *
  53 * Note that ar.ec is not saved explicitly in pt_reg or switch_stack.
  54 * This is because ar.ec is saved as part of ar.pfs.
  55 */
  56
  57
  58#include <asm/fpu.h>
  59
  60
  61#ifndef __ASSEMBLY__
  62
  63/*
  64 * This struct defines the way the registers are saved on system
  65 * calls.
  66 *
  67 * We don't save all floating point register because the kernel
  68 * is compiled to use only a very small subset, so the other are
  69 * untouched.
  70 *
  71 * THIS STRUCTURE MUST BE A MULTIPLE 16-BYTE IN SIZE
  72 * (because the memory stack pointer MUST ALWAYS be aligned this way)
  73 *
  74 */
  75struct pt_regs {
  76        /* The following registers are saved by SAVE_MIN: */
  77        unsigned long b6;               /* scratch */
  78        unsigned long b7;               /* scratch */
  79
  80        unsigned long ar_csd;           /* used by cmp8xchg16 (scratch) */
  81        unsigned long ar_ssd;           /* reserved for future use (scratch) */
  82
  83        unsigned long r8;               /* scratch (return value register 0) */
  84        unsigned long r9;               /* scratch (return value register 1) */
  85        unsigned long r10;              /* scratch (return value register 2) */
  86        unsigned long r11;              /* scratch (return value register 3) */
  87
  88        unsigned long cr_ipsr;          /* interrupted task's psr */
  89        unsigned long cr_iip;           /* interrupted task's instruction pointer */
  90        /*
  91         * interrupted task's function state; if bit 63 is cleared, it
  92         * contains syscall's ar.pfs.pfm:
  93         */
  94        unsigned long cr_ifs;
  95
  96        unsigned long ar_unat;          /* interrupted task's NaT register (preserved) */
  97        unsigned long ar_pfs;           /* prev function state  */
  98        unsigned long ar_rsc;           /* RSE configuration */
  99        /* The following two are valid only if cr_ipsr.cpl > 0 || ti->flags & _TIF_MCA_INIT */
 100        unsigned long ar_rnat;          /* RSE NaT */
 101        unsigned long ar_bspstore;      /* RSE bspstore */
 102
 103        unsigned long pr;               /* 64 predicate registers (1 bit each) */
 104        unsigned long b0;               /* return pointer (bp) */
 105        unsigned long loadrs;           /* size of dirty partition << 16 */
 106
 107        unsigned long r1;               /* the gp pointer */
 108        unsigned long r12;              /* interrupted task's memory stack pointer */
 109        unsigned long r13;              /* thread pointer */
 110
 111        unsigned long ar_fpsr;          /* floating point status (preserved) */
 112        unsigned long r15;              /* scratch */
 113
 114        /* The remaining registers are NOT saved for system calls.  */
 115
 116        unsigned long r14;              /* scratch */
 117        unsigned long r2;               /* scratch */
 118        unsigned long r3;               /* scratch */
 119
 120        /* The following registers are saved by SAVE_REST: */
 121        unsigned long r16;              /* scratch */
 122        unsigned long r17;              /* scratch */
 123        unsigned long r18;              /* scratch */
 124        unsigned long r19;              /* scratch */
 125        unsigned long r20;              /* scratch */
 126        unsigned long r21;              /* scratch */
 127        unsigned long r22;              /* scratch */
 128        unsigned long r23;              /* scratch */
 129        unsigned long r24;              /* scratch */
 130        unsigned long r25;              /* scratch */
 131        unsigned long r26;              /* scratch */
 132        unsigned long r27;              /* scratch */
 133        unsigned long r28;              /* scratch */
 134        unsigned long r29;              /* scratch */
 135        unsigned long r30;              /* scratch */
 136        unsigned long r31;              /* scratch */
 137
 138        unsigned long ar_ccv;           /* compare/exchange value (scratch) */
 139
 140        /*
 141         * Floating point registers that the kernel considers scratch:
 142         */
 143        struct ia64_fpreg f6;           /* scratch */
 144        struct ia64_fpreg f7;           /* scratch */
 145        struct ia64_fpreg f8;           /* scratch */
 146        struct ia64_fpreg f9;           /* scratch */
 147        struct ia64_fpreg f10;          /* scratch */
 148        struct ia64_fpreg f11;          /* scratch */
 149};
 150
 151/*
 152 * This structure contains the addition registers that need to
 153 * preserved across a context switch.  This generally consists of
 154 * "preserved" registers.
 155 */
 156struct switch_stack {
 157        unsigned long caller_unat;      /* user NaT collection register (preserved) */
 158        unsigned long ar_fpsr;          /* floating-point status register */
 159
 160        struct ia64_fpreg f2;           /* preserved */
 161        struct ia64_fpreg f3;           /* preserved */
 162        struct ia64_fpreg f4;           /* preserved */
 163        struct ia64_fpreg f5;           /* preserved */
 164
 165        struct ia64_fpreg f12;          /* scratch, but untouched by kernel */
 166        struct ia64_fpreg f13;          /* scratch, but untouched by kernel */
 167        struct ia64_fpreg f14;          /* scratch, but untouched by kernel */
 168        struct ia64_fpreg f15;          /* scratch, but untouched by kernel */
 169        struct ia64_fpreg f16;          /* preserved */
 170        struct ia64_fpreg f17;          /* preserved */
 171        struct ia64_fpreg f18;          /* preserved */
 172        struct ia64_fpreg f19;          /* preserved */
 173        struct ia64_fpreg f20;          /* preserved */
 174        struct ia64_fpreg f21;          /* preserved */
 175        struct ia64_fpreg f22;          /* preserved */
 176        struct ia64_fpreg f23;          /* preserved */
 177        struct ia64_fpreg f24;          /* preserved */
 178        struct ia64_fpreg f25;          /* preserved */
 179        struct ia64_fpreg f26;          /* preserved */
 180        struct ia64_fpreg f27;          /* preserved */
 181        struct ia64_fpreg f28;          /* preserved */
 182        struct ia64_fpreg f29;          /* preserved */
 183        struct ia64_fpreg f30;          /* preserved */
 184        struct ia64_fpreg f31;          /* preserved */
 185
 186        unsigned long r4;               /* preserved */
 187        unsigned long r5;               /* preserved */
 188        unsigned long r6;               /* preserved */
 189        unsigned long r7;               /* preserved */
 190
 191        unsigned long b0;               /* so we can force a direct return in copy_thread */
 192        unsigned long b1;
 193        unsigned long b2;
 194        unsigned long b3;
 195        unsigned long b4;
 196        unsigned long b5;
 197
 198        unsigned long ar_pfs;           /* previous function state */
 199        unsigned long ar_lc;            /* loop counter (preserved) */
 200        unsigned long ar_unat;          /* NaT bits for r4-r7 */
 201        unsigned long ar_rnat;          /* RSE NaT collection register */
 202        unsigned long ar_bspstore;      /* RSE dirty base (preserved) */
 203        unsigned long pr;               /* 64 predicate registers (1 bit each) */
 204};
 205
 206
 207/* pt_all_user_regs is used for PTRACE_GETREGS PTRACE_SETREGS */
 208struct pt_all_user_regs {
 209        unsigned long nat;
 210        unsigned long cr_iip;
 211        unsigned long cfm;
 212        unsigned long cr_ipsr;
 213        unsigned long pr;
 214
 215        unsigned long gr[32];
 216        unsigned long br[8];
 217        unsigned long ar[128];
 218        struct ia64_fpreg fr[128];
 219};
 220
 221#endif /* !__ASSEMBLY__ */
 222
 223/* indices to application-registers array in pt_all_user_regs */
 224#define PT_AUR_RSC      16
 225#define PT_AUR_BSP      17
 226#define PT_AUR_BSPSTORE 18
 227#define PT_AUR_RNAT     19
 228#define PT_AUR_CCV      32
 229#define PT_AUR_UNAT     36
 230#define PT_AUR_FPSR     40
 231#define PT_AUR_PFS      64
 232#define PT_AUR_LC       65
 233#define PT_AUR_EC       66
 234
 235/*
 236 * The numbers chosen here are somewhat arbitrary but absolutely MUST
 237 * not overlap with any of the number assigned in <linux/ptrace.h>.
 238 */
 239#define PTRACE_SINGLEBLOCK      12      /* resume execution until next branch */
 240#define PTRACE_OLD_GETSIGINFO   13      /* (replaced by PTRACE_GETSIGINFO in <linux/ptrace.h>)  */
 241#define PTRACE_OLD_SETSIGINFO   14      /* (replaced by PTRACE_SETSIGINFO in <linux/ptrace.h>)  */
 242#define PTRACE_GETREGS          18      /* get all registers (pt_all_user_regs) in one shot */
 243#define PTRACE_SETREGS          19      /* set all registers (pt_all_user_regs) in one shot */
 244
 245#define PTRACE_OLDSETOPTIONS    21
 246
 247#endif /* _UAPI_ASM_IA64_PTRACE_H */
 248