arch/ia64/include/uapi/asm/ptrace.h

   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  */
  75 struct 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  */
 156 struct 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 */
 208 struct 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 */