gdb/gdbserver/linux-ia64-low.c

   1 /* GNU/Linux/IA64 specific low level interface, for the remote server for GDB.
   2    Copyright (C) 1995-2013 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #include "server.h"
  20 #include "linux-low.h"
  21
  22 #ifdef HAVE_SYS_REG_H
  23 #include <sys/reg.h>
  24 #endif
  25
  26 /* Defined in auto-generated file reg-ia64.c.  */
  27 void init_registers_ia64 (void);
  28 extern const struct target_desc *tdesc_ia64;
  29
  30 #define ia64_num_regs 462
  31
  32 #include <asm/ptrace_offsets.h>
  33
  34 static int ia64_regmap[] =
  35   {
  36     /* general registers */
  37     -1,         /* gr0 not available; i.e, it's always zero */
  38     PT_R1,
  39     PT_R2,
  40     PT_R3,
  41     PT_R4,
  42     PT_R5,
  43     PT_R6,
  44     PT_R7,
  45     PT_R8,
  46     PT_R9,
  47     PT_R10,
  48     PT_R11,
  49     PT_R12,
  50     PT_R13,
  51     PT_R14,
  52     PT_R15,
  53     PT_R16,
  54     PT_R17,
  55     PT_R18,
  56     PT_R19,
  57     PT_R20,
  58     PT_R21,
  59     PT_R22,
  60     PT_R23,
  61     PT_R24,
  62     PT_R25,
  63     PT_R26,
  64     PT_R27,
  65     PT_R28,
  66     PT_R29,
  67     PT_R30,
  68     PT_R31,
  69     /* gr32 through gr127 not directly available via the ptrace interface */
  70     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  71     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  72     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  73     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  74     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  75     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  76     /* Floating point registers */
  77     -1, -1,     /* f0 and f1 not available (f0 is +0.0 and f1 is +1.0) */
  78     PT_F2,
  79     PT_F3,
  80     PT_F4,
  81     PT_F5,
  82     PT_F6,
  83     PT_F7,
  84     PT_F8,
  85     PT_F9,
  86     PT_F10,
  87     PT_F11,
  88     PT_F12,
  89     PT_F13,
  90     PT_F14,
  91     PT_F15,
  92     PT_F16,
  93     PT_F17,
  94     PT_F18,
  95     PT_F19,
  96     PT_F20,
  97     PT_F21,
  98     PT_F22,
  99     PT_F23,
 100     PT_F24,
 101     PT_F25,
 102     PT_F26,
 103     PT_F27,
 104     PT_F28,
 105     PT_F29,
 106     PT_F30,
 107     PT_F31,
 108     PT_F32,
 109     PT_F33,
 110     PT_F34,
 111     PT_F35,
 112     PT_F36,
 113     PT_F37,
 114     PT_F38,
 115     PT_F39,
 116     PT_F40,
 117     PT_F41,
 118     PT_F42,
 119     PT_F43,
 120     PT_F44,
 121     PT_F45,
 122     PT_F46,
 123     PT_F47,
 124     PT_F48,
 125     PT_F49,
 126     PT_F50,
 127     PT_F51,
 128     PT_F52,
 129     PT_F53,
 130     PT_F54,
 131     PT_F55,
 132     PT_F56,
 133     PT_F57,
 134     PT_F58,
 135     PT_F59,
 136     PT_F60,
 137     PT_F61,
 138     PT_F62,
 139     PT_F63,
 140     PT_F64,
 141     PT_F65,
 142     PT_F66,
 143     PT_F67,
 144     PT_F68,
 145     PT_F69,
 146     PT_F70,
 147     PT_F71,
 148     PT_F72,
 149     PT_F73,
 150     PT_F74,
 151     PT_F75,
 152     PT_F76,
 153     PT_F77,
 154     PT_F78,
 155     PT_F79,
 156     PT_F80,
 157     PT_F81,
 158     PT_F82,
 159     PT_F83,
 160     PT_F84,
 161     PT_F85,
 162     PT_F86,
 163     PT_F87,
 164     PT_F88,
 165     PT_F89,
 166     PT_F90,
 167     PT_F91,
 168     PT_F92,
 169     PT_F93,
 170     PT_F94,
 171     PT_F95,
 172     PT_F96,
 173     PT_F97,
 174     PT_F98,
 175     PT_F99,
 176     PT_F100,
 177     PT_F101,
 178     PT_F102,
 179     PT_F103,
 180     PT_F104,
 181     PT_F105,
 182     PT_F106,
 183     PT_F107,
 184     PT_F108,
 185     PT_F109,
 186     PT_F110,
 187     PT_F111,
 188     PT_F112,
 189     PT_F113,
 190     PT_F114,
 191     PT_F115,
 192     PT_F116,
 193     PT_F117,
 194     PT_F118,
 195     PT_F119,
 196     PT_F120,
 197     PT_F121,
 198     PT_F122,
 199     PT_F123,
 200     PT_F124,
 201     PT_F125,
 202     PT_F126,
 203     PT_F127,
 204     /* predicate registers - we don't fetch these individually */
 205     -1, -1, -1, -1, -1, -1, -1, -1,
 206     -1, -1, -1, -1, -1, -1, -1, -1,
 207     -1, -1, -1, -1, -1, -1, -1, -1,
 208     -1, -1, -1, -1, -1, -1, -1, -1,
 209     -1, -1, -1, -1, -1, -1, -1, -1,
 210     -1, -1, -1, -1, -1, -1, -1, -1,
 211     -1, -1, -1, -1, -1, -1, -1, -1,
 212     -1, -1, -1, -1, -1, -1, -1, -1,
 213     /* branch registers */
 214     PT_B0,
 215     PT_B1,
 216     PT_B2,
 217     PT_B3,
 218     PT_B4,
 219     PT_B5,
 220     PT_B6,
 221     PT_B7,
 222     /* virtual frame pointer and virtual return address pointer */
 223     -1, -1,
 224     /* other registers */
 225     PT_PR,
 226     PT_CR_IIP,  /* ip */
 227     PT_CR_IPSR, /* psr */
 228     PT_CFM,     /* cfm */
 229     /* kernel registers not visible via ptrace interface (?) */
 230     -1, -1, -1, -1, -1, -1, -1, -1,
 231     /* hole */
 232     -1, -1, -1, -1, -1, -1, -1, -1,
 233     PT_AR_RSC,
 234     PT_AR_BSP,
 235     PT_AR_BSPSTORE,
 236     PT_AR_RNAT,
 237     -1,
 238     -1,         /* Not available: FCR, IA32 floating control register */
 239     -1, -1,
 240     -1,         /* Not available: EFLAG */
 241     -1,         /* Not available: CSD */
 242     -1,         /* Not available: SSD */
 243     -1,         /* Not available: CFLG */
 244     -1,         /* Not available: FSR */
 245     -1,         /* Not available: FIR */
 246     -1,         /* Not available: FDR */
 247     -1,
 248     PT_AR_CCV,
 249     -1, -1, -1,
 250     PT_AR_UNAT,
 251     -1, -1, -1,
 252     PT_AR_FPSR,
 253     -1, -1, -1,
 254     -1,         /* Not available: ITC */
 255     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 256     -1, -1, -1, -1, -1, -1, -1, -1, -1,
 257     PT_AR_PFS,
 258     PT_AR_LC,
 259     PT_AR_EC,
 260     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 261     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 262     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 263     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 264     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 265     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 266     -1,
 267   };
 268
 269 static int
 270 ia64_cannot_store_register (int regno)
 271 {
 272   return 0;
 273 }
 274
 275 static int
 276 ia64_cannot_fetch_register (int regno)
 277 {
 278   return 0;
 279 }
 280
 281 /* GDB register numbers.  */
 282 #define IA64_GR0_REGNUM         0
 283 #define IA64_FR0_REGNUM         128
 284 #define IA64_FR1_REGNUM         129
 285
 286 static int
 287 ia64_fetch_register (struct regcache *regcache, int regnum)
 288 {
 289   /* r0 cannot be fetched but is always zero.  */
 290   if (regnum == IA64_GR0_REGNUM)
 291     {
 292       const gdb_byte zero[8] = { 0 };
 293
 294       gdb_assert (sizeof (zero) == register_size (regcache->tdesc, regnum));
 295       supply_register (regcache, regnum, zero);
 296       return 1;
 297     }
 298
 299   /* fr0 cannot be fetched but is always zero.  */
 300   if (regnum == IA64_FR0_REGNUM)
 301     {
 302       const gdb_byte f_zero[16] = { 0 };
 303
 304       gdb_assert (sizeof (f_zero) == register_size (regcache->tdesc, regnum));
 305       supply_register (regcache, regnum, f_zero);
 306       return 1;
 307     }
 308
 309   /* fr1 cannot be fetched but is always one (1.0).  */
 310   if (regnum == IA64_FR1_REGNUM)
 311     {
 312       const gdb_byte f_one[16] =
 313         { 0, 0, 0, 0, 0, 0, 0, 0x80, 0xff, 0xff, 0, 0, 0, 0, 0, 0 };
 314
 315       gdb_assert (sizeof (f_one) == register_size (regcache->tdesc, regnum));
 316       supply_register (regcache, regnum, f_one);
 317       return 1;
 318     }
 319
 320   return 0;
 321 }
 322
 323 static struct usrregs_info ia64_usrregs_info =
 324   {
 325     ia64_num_regs,
 326     ia64_regmap,
 327   };
 328
 329 static struct regs_info regs_info =
 330   {
 331     NULL, /* regset_bitmap */
 332     &ia64_usrregs_info
 333   };
 334
 335 static const struct regs_info *
 336 ia64_regs_info (void)
 337 {
 338   return &regs_info;
 339 }
 340
 341 static void
 342 ia64_arch_setup (void)
 343 {
 344   current_process ()->tdesc = tdesc_ia64;
 345 }
 346
 347
 348 struct linux_target_ops the_low_target = {
 349   ia64_arch_setup,
 350   ia64_regs_info,
 351   ia64_cannot_fetch_register,
 352   ia64_cannot_store_register,
 353   ia64_fetch_register,
 354 };
 355
 356 void
 357 initialize_low_arch (void)
 358 {
 359   init_registers_ia64 ();
 360 }