gdbserver/linux-ia64-low.cc

   1 /* GNU/Linux/IA64 specific low level interface, for the remote server for GDB.
   2    Copyright (C) 1995-2020 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 /* Linux target op definitions for the IA64 architecture.  */
  27
  28 class ia64_target : public linux_process_target
  29 {
  30 public:
  31
  32 };
  33
  34 /* The singleton target ops object.  */
  35
  36 static ia64_target the_ia64_target;
  37
  38 /* Defined in auto-generated file reg-ia64.c.  */
  39 void init_registers_ia64 (void);
  40 extern const struct target_desc *tdesc_ia64;
  41
  42 #define ia64_num_regs 462
  43
  44 #include <asm/ptrace_offsets.h>
  45
  46 static int ia64_regmap[] =
  47   {
  48     /* general registers */
  49     -1,         /* gr0 not available; i.e, it's always zero */
  50     PT_R1,
  51     PT_R2,
  52     PT_R3,
  53     PT_R4,
  54     PT_R5,
  55     PT_R6,
  56     PT_R7,
  57     PT_R8,
  58     PT_R9,
  59     PT_R10,
  60     PT_R11,
  61     PT_R12,
  62     PT_R13,
  63     PT_R14,
  64     PT_R15,
  65     PT_R16,
  66     PT_R17,
  67     PT_R18,
  68     PT_R19,
  69     PT_R20,
  70     PT_R21,
  71     PT_R22,
  72     PT_R23,
  73     PT_R24,
  74     PT_R25,
  75     PT_R26,
  76     PT_R27,
  77     PT_R28,
  78     PT_R29,
  79     PT_R30,
  80     PT_R31,
  81     /* gr32 through gr127 not directly available via the ptrace interface */
  82     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  83     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  84     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  85     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  86     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  87     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  88     /* Floating point registers */
  89     -1, -1,     /* f0 and f1 not available (f0 is +0.0 and f1 is +1.0) */
  90     PT_F2,
  91     PT_F3,
  92     PT_F4,
  93     PT_F5,
  94     PT_F6,
  95     PT_F7,
  96     PT_F8,
  97     PT_F9,
  98     PT_F10,
  99     PT_F11,
 100     PT_F12,
 101     PT_F13,
 102     PT_F14,
 103     PT_F15,
 104     PT_F16,
 105     PT_F17,
 106     PT_F18,
 107     PT_F19,
 108     PT_F20,
 109     PT_F21,
 110     PT_F22,
 111     PT_F23,
 112     PT_F24,
 113     PT_F25,
 114     PT_F26,
 115     PT_F27,
 116     PT_F28,
 117     PT_F29,
 118     PT_F30,
 119     PT_F31,
 120     PT_F32,
 121     PT_F33,
 122     PT_F34,
 123     PT_F35,
 124     PT_F36,
 125     PT_F37,
 126     PT_F38,
 127     PT_F39,
 128     PT_F40,
 129     PT_F41,
 130     PT_F42,
 131     PT_F43,
 132     PT_F44,
 133     PT_F45,
 134     PT_F46,
 135     PT_F47,
 136     PT_F48,
 137     PT_F49,
 138     PT_F50,
 139     PT_F51,
 140     PT_F52,
 141     PT_F53,
 142     PT_F54,
 143     PT_F55,
 144     PT_F56,
 145     PT_F57,
 146     PT_F58,
 147     PT_F59,
 148     PT_F60,
 149     PT_F61,
 150     PT_F62,
 151     PT_F63,
 152     PT_F64,
 153     PT_F65,
 154     PT_F66,
 155     PT_F67,
 156     PT_F68,
 157     PT_F69,
 158     PT_F70,
 159     PT_F71,
 160     PT_F72,
 161     PT_F73,
 162     PT_F74,
 163     PT_F75,
 164     PT_F76,
 165     PT_F77,
 166     PT_F78,
 167     PT_F79,
 168     PT_F80,
 169     PT_F81,
 170     PT_F82,
 171     PT_F83,
 172     PT_F84,
 173     PT_F85,
 174     PT_F86,
 175     PT_F87,
 176     PT_F88,
 177     PT_F89,
 178     PT_F90,
 179     PT_F91,
 180     PT_F92,
 181     PT_F93,
 182     PT_F94,
 183     PT_F95,
 184     PT_F96,
 185     PT_F97,
 186     PT_F98,
 187     PT_F99,
 188     PT_F100,
 189     PT_F101,
 190     PT_F102,
 191     PT_F103,
 192     PT_F104,
 193     PT_F105,
 194     PT_F106,
 195     PT_F107,
 196     PT_F108,
 197     PT_F109,
 198     PT_F110,
 199     PT_F111,
 200     PT_F112,
 201     PT_F113,
 202     PT_F114,
 203     PT_F115,
 204     PT_F116,
 205     PT_F117,
 206     PT_F118,
 207     PT_F119,
 208     PT_F120,
 209     PT_F121,
 210     PT_F122,
 211     PT_F123,
 212     PT_F124,
 213     PT_F125,
 214     PT_F126,
 215     PT_F127,
 216     /* predicate registers - we don't fetch these individually */
 217     -1, -1, -1, -1, -1, -1, -1, -1,
 218     -1, -1, -1, -1, -1, -1, -1, -1,
 219     -1, -1, -1, -1, -1, -1, -1, -1,
 220     -1, -1, -1, -1, -1, -1, -1, -1,
 221     -1, -1, -1, -1, -1, -1, -1, -1,
 222     -1, -1, -1, -1, -1, -1, -1, -1,
 223     -1, -1, -1, -1, -1, -1, -1, -1,
 224     -1, -1, -1, -1, -1, -1, -1, -1,
 225     /* branch registers */
 226     PT_B0,
 227     PT_B1,
 228     PT_B2,
 229     PT_B3,
 230     PT_B4,
 231     PT_B5,
 232     PT_B6,
 233     PT_B7,
 234     /* virtual frame pointer and virtual return address pointer */
 235     -1, -1,
 236     /* other registers */
 237     PT_PR,
 238     PT_CR_IIP,  /* ip */
 239     PT_CR_IPSR, /* psr */
 240     PT_CFM,     /* cfm */
 241     /* kernel registers not visible via ptrace interface (?) */
 242     -1, -1, -1, -1, -1, -1, -1, -1,
 243     /* hole */
 244     -1, -1, -1, -1, -1, -1, -1, -1,
 245     PT_AR_RSC,
 246     PT_AR_BSP,
 247     PT_AR_BSPSTORE,
 248     PT_AR_RNAT,
 249     -1,
 250     -1,         /* Not available: FCR, IA32 floating control register */
 251     -1, -1,
 252     -1,         /* Not available: EFLAG */
 253     -1,         /* Not available: CSD */
 254     -1,         /* Not available: SSD */
 255     -1,         /* Not available: CFLG */
 256     -1,         /* Not available: FSR */
 257     -1,         /* Not available: FIR */
 258     -1,         /* Not available: FDR */
 259     -1,
 260     PT_AR_CCV,
 261     -1, -1, -1,
 262     PT_AR_UNAT,
 263     -1, -1, -1,
 264     PT_AR_FPSR,
 265     -1, -1, -1,
 266     -1,         /* Not available: ITC */
 267     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 268     -1, -1, -1, -1, -1, -1, -1, -1, -1,
 269     PT_AR_PFS,
 270     PT_AR_LC,
 271     PT_AR_EC,
 272     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 273     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 274     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 275     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 276     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 277     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 278     -1,
 279   };
 280
 281 static int
 282 ia64_cannot_store_register (int regno)
 283 {
 284   return 0;
 285 }
 286
 287 static int
 288 ia64_cannot_fetch_register (int regno)
 289 {
 290   return 0;
 291 }
 292
 293 /* GDB register numbers.  */
 294 #define IA64_GR0_REGNUM         0
 295 #define IA64_FR0_REGNUM         128
 296 #define IA64_FR1_REGNUM         129
 297
 298 static int
 299 ia64_fetch_register (struct regcache *regcache, int regnum)
 300 {
 301   /* r0 cannot be fetched but is always zero.  */
 302   if (regnum == IA64_GR0_REGNUM)
 303     {
 304       const gdb_byte zero[8] = { 0 };
 305
 306       gdb_assert (sizeof (zero) == register_size (regcache->tdesc, regnum));
 307       supply_register (regcache, regnum, zero);
 308       return 1;
 309     }
 310
 311   /* fr0 cannot be fetched but is always zero.  */
 312   if (regnum == IA64_FR0_REGNUM)
 313     {
 314       const gdb_byte f_zero[16] = { 0 };
 315
 316       gdb_assert (sizeof (f_zero) == register_size (regcache->tdesc, regnum));
 317       supply_register (regcache, regnum, f_zero);
 318       return 1;
 319     }
 320
 321   /* fr1 cannot be fetched but is always one (1.0).  */
 322   if (regnum == IA64_FR1_REGNUM)
 323     {
 324       const gdb_byte f_one[16] =
 325         { 0, 0, 0, 0, 0, 0, 0, 0x80, 0xff, 0xff, 0, 0, 0, 0, 0, 0 };
 326
 327       gdb_assert (sizeof (f_one) == register_size (regcache->tdesc, regnum));
 328       supply_register (regcache, regnum, f_one);
 329       return 1;
 330     }
 331
 332   return 0;
 333 }
 334
 335 static struct usrregs_info ia64_usrregs_info =
 336   {
 337     ia64_num_regs,
 338     ia64_regmap,
 339   };
 340
 341 static struct regs_info regs_info =
 342   {
 343     NULL, /* regset_bitmap */
 344     &ia64_usrregs_info
 345   };
 346
 347 static const struct regs_info *
 348 ia64_regs_info (void)
 349 {
 350   return &regs_info;
 351 }
 352
 353 static void
 354 ia64_arch_setup (void)
 355 {
 356   current_process ()->tdesc = tdesc_ia64;
 357 }
 358
 359
 360 struct linux_target_ops the_low_target = {
 361   ia64_arch_setup,
 362   ia64_regs_info,
 363   ia64_cannot_fetch_register,
 364   ia64_cannot_store_register,
 365   ia64_fetch_register,
 366 };
 367
 368 /* The linux target ops object.  */
 369
 370 linux_process_target *the_linux_target = &the_ia64_target;
 371
 372 void
 373 initialize_low_arch (void)
 374 {
 375   init_registers_ia64 ();
 376 }