gdb/config/pa/tm-hppa.h

   1 /* Parameters for execution on any Hewlett-Packard PA-RISC machine.
   2    Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
   3    1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
   4
   5    Contributed by the Center for Software Science at the
   6    University of Utah (pa-gdb-bugs@cs.utah.edu).
   7
   8    This file is part of GDB.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 59 Temple Place - Suite 330,
  23    Boston, MA 02111-1307, USA.  */
  24
  25 #include "regcache.h"
  26
  27 /* Wonder if this is correct?  Should be using push_dummy_call().  */
  28 #define DEPRECATED_DUMMY_WRITE_SP(SP) generic_target_write_sp (SP)
  29
  30 #ifndef GDB_MULTI_ARCH
  31 #define GDB_MULTI_ARCH 1
  32 #endif
  33
  34 /* NOTE: cagney/2002-11-24: This is a guess.  */
  35 #define DEPRECATED_USE_GENERIC_DUMMY_FRAMES 0
  36 #define CALL_DUMMY_LOCATION ON_STACK
  37 #define DEPRECATED_PC_IN_CALL_DUMMY(pc, sp, frame_address) deprecated_pc_in_call_dummy_on_stack (pc, sp, frame_address)
  38 #define DEPRECATED_INIT_FRAME_PC(l,f) (init_frame_pc_default (l, f))
  39
  40 /* Forward declarations of some types we use in prototypes */
  41
  42 struct frame_info;
  43 struct frame_saved_regs;
  44 struct value;
  45 struct type;
  46 struct inferior_status;
  47
  48 /* By default assume we don't have to worry about software floating point.  */
  49 #ifndef SOFT_FLOAT
  50 #define SOFT_FLOAT 0
  51 #endif
  52
  53 /* Get at various relevent fields of an instruction word. */
  54
  55 #define MASK_5 0x1f
  56 #define MASK_11 0x7ff
  57 #define MASK_14 0x3fff
  58 #define MASK_21 0x1fffff
  59
  60 /* This macro gets bit fields using HP's numbering (MSB = 0) */
  61 #ifndef GET_FIELD
  62 #define GET_FIELD(X, FROM, TO) \
  63   ((X) >> (31 - (TO)) & ((1 << ((TO) - (FROM) + 1)) - 1))
  64 #endif
  65
  66 #if !GDB_MULTI_ARCH
  67 extern int hppa_reg_struct_has_addr (int gcc_p, struct type *type);
  68 #define REG_STRUCT_HAS_ADDR(gcc_p,type) hppa_reg_struct_has_addr (gcc_p,type)
  69 #endif
  70
  71 /* Offset from address of function to start of its code.
  72    Zero on most machines.  */
  73
  74 #if !GDB_MULTI_ARCH
  75 #define FUNCTION_START_OFFSET 0
  76 #endif
  77
  78 /* Advance PC across any function entry prologue instructions
  79    to reach some "real" code.  */
  80
  81 #if !GDB_MULTI_ARCH
  82 extern CORE_ADDR hppa_skip_prologue (CORE_ADDR);
  83 #define SKIP_PROLOGUE(pc) (hppa_skip_prologue (pc))
  84 #endif
  85
  86 /* If PC is in some function-call trampoline code, return the PC
  87    where the function itself actually starts.  If not, return NULL.  */
  88
  89 #if !GDB_MULTI_ARCH
  90 #define SKIP_TRAMPOLINE_CODE(pc) hppa_skip_trampoline_code (pc)
  91 extern CORE_ADDR hppa_skip_trampoline_code (CORE_ADDR);
  92 #endif
  93
  94 /* Return non-zero if we are in an appropriate trampoline. */
  95
  96 #if !GDB_MULTI_ARCH
  97 #define IN_SOLIB_CALL_TRAMPOLINE(pc, name) \
  98    hppa_in_solib_call_trampoline (pc, name)
  99 extern int hppa_in_solib_call_trampoline (CORE_ADDR, char *);
 100 #endif
 101
 102 #if !GDB_MULTI_ARCH
 103 #define IN_SOLIB_RETURN_TRAMPOLINE(pc, name) \
 104   hppa_in_solib_return_trampoline (pc, name)
 105 extern int hppa_in_solib_return_trampoline (CORE_ADDR, char *);
 106 #endif
 107
 108 #if !GDB_MULTI_ARCH
 109 #undef  DEPRECATED_SAVED_PC_AFTER_CALL
 110 #define DEPRECATED_SAVED_PC_AFTER_CALL(frame) hppa_saved_pc_after_call (frame)
 111 extern CORE_ADDR hppa_saved_pc_after_call (struct frame_info *);
 112 #endif
 113
 114 #if !GDB_MULTI_ARCH
 115 extern int hppa_inner_than (CORE_ADDR lhs, CORE_ADDR rhs);
 116 #define INNER_THAN(lhs,rhs) hppa_inner_than(lhs,rhs)
 117 #endif
 118
 119 #if !GDB_MULTI_ARCH
 120 extern CORE_ADDR hppa_stack_align (CORE_ADDR sp);
 121 #define STACK_ALIGN(sp) hppa_stack_align (sp)
 122 #endif
 123
 124 /* Sequence of bytes for breakpoint instruction.  */
 125
 126 #define BREAKPOINT {0x00, 0x01, 0x00, 0x04}
 127 #define BREAKPOINT32 0x10004
 128
 129 /* Amount PC must be decremented by after a breakpoint.
 130    This is often the number of bytes in BREAKPOINT
 131    but not always.
 132
 133    Not on the PA-RISC */
 134
 135 #if !GDB_MULTI_ARCH
 136 #define DECR_PC_AFTER_BREAK 0
 137 #endif
 138
 139 extern int hppa_pc_requires_run_before_use (CORE_ADDR pc);
 140 #define PC_REQUIRES_RUN_BEFORE_USE(pc) hppa_pc_requires_run_before_use (pc)
 141
 142 /* Say how long (ordinary) registers are.  This is a piece of bogosity
 143    used in push_word and a few other places; REGISTER_RAW_SIZE is the
 144    real way to know how big a register is.  */
 145
 146 #if !GDB_MULTI_ARCH
 147 #define REGISTER_SIZE 4
 148 #endif
 149
 150 /* Number of machine registers */
 151
 152 #if !GDB_MULTI_ARCH
 153 #define NUM_REGS 128
 154 #endif
 155
 156 /* Initializer for an array of names of registers.
 157    There should be NUM_REGS strings in this initializer.
 158    They are in rows of eight entries  */
 159
 160 #define REGISTER_NAMES  \
 161  {"flags",  "r1",      "rp",      "r3",    "r4",     "r5",      "r6",     "r7",    \
 162   "r8",     "r9",      "r10",     "r11",   "r12",    "r13",     "r14",    "r15",   \
 163   "r16",    "r17",     "r18",     "r19",   "r20",    "r21",     "r22",    "r23",   \
 164   "r24",    "r25",     "r26",     "dp",    "ret0",   "ret1",    "sp",     "r31",   \
 165   "sar",    "pcoqh",   "pcsqh",   "pcoqt", "pcsqt",  "eiem",    "iir",    "isr",   \
 166   "ior",    "ipsw",    "goto",    "sr4",   "sr0",    "sr1",     "sr2",    "sr3",   \
 167   "sr5",    "sr6",     "sr7",     "cr0",   "cr8",    "cr9",     "ccr",    "cr12",  \
 168   "cr13",   "cr24",    "cr25",    "cr26",  "mpsfu_high","mpsfu_low","mpsfu_ovflo","pad",\
 169   "fpsr",    "fpe1",   "fpe2",    "fpe3",  "fpe4",   "fpe5",    "fpe6",   "fpe7",  \
 170   "fr4",     "fr4R",   "fr5",     "fr5R",  "fr6",    "fr6R",    "fr7",    "fr7R",  \
 171   "fr8",     "fr8R",   "fr9",     "fr9R",  "fr10",   "fr10R",   "fr11",   "fr11R", \
 172   "fr12",    "fr12R",  "fr13",    "fr13R", "fr14",   "fr14R",   "fr15",   "fr15R", \
 173   "fr16",    "fr16R",  "fr17",    "fr17R", "fr18",   "fr18R",   "fr19",   "fr19R", \
 174   "fr20",    "fr20R",  "fr21",    "fr21R", "fr22",   "fr22R",   "fr23",   "fr23R", \
 175   "fr24",    "fr24R",  "fr25",    "fr25R", "fr26",   "fr26R",   "fr27",   "fr27R", \
 176   "fr28",    "fr28R",  "fr29",    "fr29R", "fr30",   "fr30R",   "fr31",   "fr31R"}
 177
 178 /* Register numbers of various important registers.
 179    Note that some of these values are "real" register numbers,
 180    and correspond to the general registers of the machine,
 181    and some are "phony" register numbers which are too large
 182    to be actual register numbers as far as the user is concerned
 183    but do serve to get the desired values when passed to read_register.  */
 184
 185 #define R0_REGNUM 0             /* Doesn't actually exist, used as base for
 186                                    other r registers.  */
 187 #define FLAGS_REGNUM 0          /* Various status flags */
 188 #define RP_REGNUM 2             /* return pointer */
 189 #if !GDB_MULTI_ARCH
 190 #define FP_REGNUM 3             /* Contains address of executing stack */
 191                                 /* frame */
 192 #endif
 193 #if !GDB_MULTI_ARCH
 194 #define SP_REGNUM 30            /* Contains address of top of stack */
 195 #endif
 196 #define SAR_REGNUM 32           /* Shift Amount Register */
 197 #define IPSW_REGNUM 41          /* Interrupt Processor Status Word */
 198 #define PCOQ_HEAD_REGNUM 33     /* instruction offset queue head */
 199 #define PCSQ_HEAD_REGNUM 34     /* instruction space queue head */
 200 #define PCOQ_TAIL_REGNUM 35     /* instruction offset queue tail */
 201 #define PCSQ_TAIL_REGNUM 36     /* instruction space queue tail */
 202 #define EIEM_REGNUM 37          /* External Interrupt Enable Mask */
 203 #define IIR_REGNUM 38           /* Interrupt Instruction Register */
 204 #define IOR_REGNUM 40           /* Interrupt Offset Register */
 205 #define SR4_REGNUM 43           /* space register 4 */
 206 #define RCR_REGNUM 51           /* Recover Counter (also known as cr0) */
 207 #define CCR_REGNUM 54           /* Coprocessor Configuration Register */
 208 #define TR0_REGNUM 57           /* Temporary Registers (cr24 -> cr31) */
 209 #define CR27_REGNUM 60          /* Base register for thread-local storage, cr27 */
 210 #if !GDB_MULTI_ARCH
 211 #define FP0_REGNUM 64           /* floating point reg. 0 (fspr) */
 212 #endif
 213 #define FP4_REGNUM 72
 214
 215 #define ARG0_REGNUM 26          /* The first argument of a callee. */
 216 #define ARG1_REGNUM 25          /* The second argument of a callee. */
 217 #define ARG2_REGNUM 24          /* The third argument of a callee. */
 218 #define ARG3_REGNUM 23          /* The fourth argument of a callee. */
 219
 220 /* compatibility with the rest of gdb. */
 221 #if !GDB_MULTI_ARCH
 222 #define PC_REGNUM PCOQ_HEAD_REGNUM
 223 #endif
 224 #if !GDB_MULTI_ARCH
 225 #define NPC_REGNUM PCOQ_TAIL_REGNUM
 226 #endif
 227
 228 /*
 229  * Processor Status Word Masks
 230  */
 231
 232 #define PSW_T   0x01000000      /* Taken Branch Trap Enable */
 233 #define PSW_H   0x00800000      /* Higher-Privilege Transfer Trap Enable */
 234 #define PSW_L   0x00400000      /* Lower-Privilege Transfer Trap Enable */
 235 #define PSW_N   0x00200000      /* PC Queue Front Instruction Nullified */
 236 #define PSW_X   0x00100000      /* Data Memory Break Disable */
 237 #define PSW_B   0x00080000      /* Taken Branch in Previous Cycle */
 238 #define PSW_C   0x00040000      /* Code Address Translation Enable */
 239 #define PSW_V   0x00020000      /* Divide Step Correction */
 240 #define PSW_M   0x00010000      /* High-Priority Machine Check Disable */
 241 #define PSW_CB  0x0000ff00      /* Carry/Borrow Bits */
 242 #define PSW_R   0x00000010      /* Recovery Counter Enable */
 243 #define PSW_Q   0x00000008      /* Interruption State Collection Enable */
 244 #define PSW_P   0x00000004      /* Protection ID Validation Enable */
 245 #define PSW_D   0x00000002      /* Data Address Translation Enable */
 246 #define PSW_I   0x00000001      /* External, Power Failure, Low-Priority */
 247                                 /* Machine Check Interruption Enable */
 248
 249 /* When fetching register values from an inferior or a core file,
 250    clean them up using this macro.  BUF is a char pointer to
 251    the raw value of the register in the registers[] array.  */
 252
 253 #define DEPRECATED_CLEAN_UP_REGISTER_VALUE(regno, buf) \
 254   do {  \
 255     if ((regno) == PCOQ_HEAD_REGNUM || (regno) == PCOQ_TAIL_REGNUM) \
 256       (buf)[sizeof(CORE_ADDR) -1] &= ~0x3; \
 257   } while (0)
 258
 259 /* Define DEPRECATED_DO_REGISTERS_INFO() to do machine-specific
 260    formatting of register dumps. */
 261
 262 #define DEPRECATED_DO_REGISTERS_INFO(_regnum, fp) pa_do_registers_info (_regnum, fp)
 263 extern void pa_do_registers_info (int, int);
 264
 265 #if 0
 266 #define STRCAT_REGISTER(regnum, fpregs, stream, precision) pa_do_strcat_registers_info (regnum, fpregs, stream, precision)
 267 extern void pa_do_strcat_registers_info (int, int, struct ui_file *, enum precision_type);
 268 #endif
 269
 270 /* PA specific macro to see if the current instruction is nullified. */
 271 #ifndef INSTRUCTION_NULLIFIED
 272 extern int hppa_instruction_nullified (void);
 273 #define INSTRUCTION_NULLIFIED hppa_instruction_nullified ()
 274 #endif
 275
 276 /* Number of bytes of storage in the actual machine representation
 277    for register N.  On the PA-RISC, all regs are 4 bytes, including
 278    the FP registers (they're accessed as two 4 byte halves).  */
 279
 280 #if !GDB_MULTI_ARCH
 281 extern int hppa_register_raw_size (int reg_nr);
 282 #define REGISTER_RAW_SIZE(N) hppa_register_raw_size (N)
 283 #endif
 284
 285 /* Total amount of space needed to store our copies of the machine's
 286    register state, the array `registers'.  */
 287 #if !GDB_MULTI_ARCH
 288 #define REGISTER_BYTES (NUM_REGS * 4)
 289 #endif
 290
 291 #if !GDB_MULTI_ARCH
 292 extern int hppa_register_byte (int reg_nr);
 293 #define REGISTER_BYTE(N) hppa_register_byte (N)
 294 #endif
 295
 296 /* Number of bytes of storage in the program's representation
 297    for register N. */
 298
 299 #if !GDB_MULTI_ARCH
 300 #define REGISTER_VIRTUAL_SIZE(N) REGISTER_RAW_SIZE(N)
 301 #endif
 302
 303 /* Largest value REGISTER_RAW_SIZE can have.  */
 304
 305 #if !GDB_MULTI_ARCH
 306 #define DEPRECATED_MAX_REGISTER_RAW_SIZE 4
 307 #endif
 308
 309 /* Largest value REGISTER_VIRTUAL_SIZE can have.  */
 310
 311 #if !GDB_MULTI_ARCH
 312 #define DEPRECATED_MAX_REGISTER_VIRTUAL_SIZE 8
 313 #endif
 314
 315 #if !GDB_MULTI_ARCH
 316 extern struct type * hppa_register_virtual_type (int reg_nr);
 317 #define REGISTER_VIRTUAL_TYPE(N) hppa_register_virtual_type (N)
 318 #endif
 319
 320 #if !GDB_MULTI_ARCH
 321 extern void hppa_store_struct_return (CORE_ADDR addr, CORE_ADDR sp);
 322 #define STORE_STRUCT_RETURN(ADDR, SP) hppa_store_struct_return (ADDR, SP)
 323 #endif
 324
 325 /* Extract from an array REGBUF containing the (raw) register state
 326    a function return value of type TYPE, and copy that, in virtual format,
 327    into VALBUF.  */
 328
 329 #if !GDB_MULTI_ARCH
 330 void hppa_extract_return_value (struct type *type, char *regbuf, char *valbuf);
 331 #define DEPRECATED_EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
 332   hppa_extract_return_value (TYPE, REGBUF, VALBUF);
 333 #endif
 334
 335  /* elz: decide whether the function returning a value of type type
 336     will put it on the stack or in the registers.
 337     The pa calling convention says that:
 338     register 28 (called ret0 by gdb) contains any ASCII char,
 339     and any non_floating point value up to 32-bits.
 340     reg 28 and 29 contain non-floating point up tp 64 bits and larger
 341     than 32 bits. (higer order word in reg 28).
 342     fr4: floating point up to 64 bits
 343     sr1: space identifier (32-bit)
 344     stack: any lager than 64-bit, with the address in r28
 345   */
 346 #if !GDB_MULTI_ARCH
 347 extern use_struct_convention_fn hppa_use_struct_convention;
 348 #define USE_STRUCT_CONVENTION(gcc_p,type) hppa_use_struct_convention (gcc_p,type)
 349 #endif
 350
 351 /* Write into appropriate registers a function return value
 352    of type TYPE, given in virtual format.  */
 353
 354 #if !GDB_MULTI_ARCH
 355 extern void hppa_store_return_value (struct type *type, char *valbuf);
 356 #define DEPRECATED_STORE_RETURN_VALUE(TYPE,VALBUF) \
 357   hppa_store_return_value (TYPE, VALBUF);
 358 #endif
 359
 360 #if !GDB_MULTI_ARCH
 361 extern CORE_ADDR hppa_extract_struct_value_address (char *regbuf);
 362 #define DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
 363   hppa_extract_struct_value_address (REGBUF)
 364 #endif
 365
 366 /* elz: Return a large value, which is stored on the stack at addr.
 367    This is defined only for the hppa, at this moment.  The above macro
 368    DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS is not called anymore,
 369    because it assumes that on exit from a called function which
 370    returns a large structure on the stack, the address of the ret
 371    structure is still in register 28. Unfortunately this register is
 372    usually overwritten by the called function itself, on hppa. This is
 373    specified in the calling convention doc. As far as I know, the only
 374    way to get the return value is to have the caller tell us where it
 375    told the callee to put it, rather than have the callee tell us.  */
 376 struct value *hppa_value_returned_from_stack (register struct type *valtype,
 377                                               CORE_ADDR addr);
 378 #define VALUE_RETURNED_FROM_STACK(valtype,addr) \
 379   hppa_value_returned_from_stack (valtype, addr)
 380
 381 #if !GDB_MULTI_ARCH
 382 extern int hppa_cannot_store_register (int regnum);
 383 #define CANNOT_STORE_REGISTER(regno) hppa_cannot_store_register (regno)
 384 #endif
 385
 386 #if !GDB_MULTI_ARCH
 387 #define DEPRECATED_INIT_EXTRA_FRAME_INFO(fromleaf, frame) hppa_init_extra_frame_info (fromleaf, frame)
 388 extern void hppa_init_extra_frame_info (int, struct frame_info *);
 389 #endif
 390
 391 /* Describe the pointer in each stack frame to the previous stack frame
 392    (its caller).  */
 393
 394 /* DEPRECATED_FRAME_CHAIN takes a frame's nominal address and produces
 395    the frame's chain-pointer.  */
 396
 397 /* In the case of the PA-RISC, the frame's nominal address
 398    is the address of a 4-byte word containing the calling frame's
 399    address (previous FP).  */
 400
 401 #if !GDB_MULTI_ARCH
 402 #define DEPRECATED_FRAME_CHAIN(thisframe) hppa_frame_chain (thisframe)
 403 extern CORE_ADDR hppa_frame_chain (struct frame_info *);
 404 #endif
 405
 406 #if !GDB_MULTI_ARCH
 407 extern int hppa_frame_chain_valid (CORE_ADDR, struct frame_info *);
 408 #define DEPRECATED_FRAME_CHAIN_VALID(chain, thisframe) hppa_frame_chain_valid (chain, thisframe)
 409 #endif
 410
 411 /* Define other aspects of the stack frame.  */
 412
 413 /* A macro that tells us whether the function invocation represented
 414    by FI does not have a frame on the stack associated with it.  If it
 415    does not, FRAMELESS is set to 1, else 0.  */
 416 #if !GDB_MULTI_ARCH
 417 #define FRAMELESS_FUNCTION_INVOCATION(FI) \
 418   (hppa_frameless_function_invocation (FI))
 419 extern int hppa_frameless_function_invocation (struct frame_info *);
 420 #endif
 421
 422 #if !GDB_MULTI_ARCH
 423 extern CORE_ADDR hppa_frame_saved_pc (struct frame_info *frame);
 424 #define DEPRECATED_FRAME_SAVED_PC(FRAME) hppa_frame_saved_pc (FRAME)
 425 #endif
 426
 427 #if !GDB_MULTI_ARCH
 428 extern CORE_ADDR hppa_frame_args_address (struct frame_info *fi);
 429 #define FRAME_ARGS_ADDRESS(fi) hppa_frame_args_address (fi)
 430 #endif
 431
 432 #if !GDB_MULTI_ARCH
 433 extern CORE_ADDR hppa_frame_locals_address (struct frame_info *fi);
 434 #define FRAME_LOCALS_ADDRESS(fi) hppa_frame_locals_address (fi)
 435 #endif
 436
 437 #if !GDB_MULTI_ARCH
 438 extern int hppa_frame_num_args (struct frame_info *frame);
 439 #define FRAME_NUM_ARGS(fi) hppa_frame_num_args (fi)
 440 #endif
 441
 442 #if !GDB_MULTI_ARCH
 443 #define FRAME_ARGS_SKIP 0
 444 #endif
 445
 446 extern void hppa_frame_init_saved_regs (struct frame_info *);
 447 #define DEPRECATED_FRAME_INIT_SAVED_REGS(FI) \
 448   hppa_frame_init_saved_regs (FI)
 449
 450 /* Things needed for making the inferior call functions.  */
 451
 452 #if !GDB_MULTI_ARCH
 453 #define DEPRECATED_PUSH_DUMMY_FRAME hppa_push_dummy_frame ()
 454 extern void hppa_push_dummy_frame (void);
 455 #endif
 456
 457 /* Discard from the stack the innermost frame,
 458    restoring all saved registers.  */
 459 #if !GDB_MULTI_ARCH
 460 #define DEPRECATED_POP_FRAME  hppa_pop_frame ()
 461 extern void hppa_pop_frame (void);
 462 #endif
 463
 464 #define INSTRUCTION_SIZE 4
 465
 466 //OBSOLETE #ifndef PA_LEVEL_0
 467
 468 /* Non-level zero PA's have space registers (but they don't always have
 469    floating-point, do they????  */
 470
 471 /* This sequence of words is the instructions
 472
 473    ; Call stack frame has already been built by gdb. Since we could be calling
 474    ; a varargs function, and we do not have the benefit of a stub to put things in
 475    ; the right place, we load the first 4 word of arguments into both the general
 476    ; and fp registers.
 477    call_dummy
 478    ldw -36(sp), arg0
 479    ldw -40(sp), arg1
 480    ldw -44(sp), arg2
 481    ldw -48(sp), arg3
 482    ldo -36(sp), r1
 483    fldws 0(0, r1), fr4
 484    fldds -4(0, r1), fr5
 485    fldws -8(0, r1), fr6
 486    fldds -12(0, r1), fr7
 487    ldil 0, r22                  ; FUNC_LDIL_OFFSET must point here
 488    ldo 0(r22), r22                      ; FUNC_LDO_OFFSET must point here
 489    ldsid (0,r22), r4
 490    ldil 0, r1                   ; SR4EXPORT_LDIL_OFFSET must point here
 491    ldo 0(r1), r1                        ; SR4EXPORT_LDO_OFFSET must point here
 492    ldsid (0,r1), r20
 493    combt,=,n r4, r20, text_space        ; If target is in data space, do a
 494    ble 0(sr5, r22)                      ; "normal" procedure call
 495    copy r31, r2
 496    break 4, 8
 497    mtsp r21, sr0
 498    ble,n 0(sr0, r22)
 499    text_space                           ; Otherwise, go through _sr4export,
 500    ble (sr4, r1)                        ; which will return back here.
 501    stw r31,-24(r30)
 502    break 4, 8
 503    mtsp r21, sr0
 504    ble,n 0(sr0, r22)
 505    nop                          ; To avoid kernel bugs
 506    nop                          ; and keep the dummy 8 byte aligned
 507
 508    The dummy decides if the target is in text space or data space. If
 509    it's in data space, there's no problem because the target can
 510    return back to the dummy. However, if the target is in text space,
 511    the dummy calls the secret, undocumented routine _sr4export, which
 512    calls a function in text space and can return to any space. Instead
 513    of including fake instructions to represent saved registers, we
 514    know that the frame is associated with the call dummy and treat it
 515    specially.
 516
 517    The trailing NOPs are needed to avoid a bug in HPUX, BSD and OSF1
 518    kernels.   If the memory at the location pointed to by the PC is
 519    0xffffffff then a ptrace step call will fail (even if the instruction
 520    is nullified).
 521
 522    The code to pop a dummy frame single steps three instructions
 523    starting with the last mtsp.  This includes the nullified "instruction"
 524    following the ble (which is uninitialized junk).  If the
 525    "instruction" following the last BLE is 0xffffffff, then the ptrace
 526    will fail and the dummy frame is not correctly popped.
 527
 528    By placing a NOP in the delay slot of the BLE instruction we can be
 529    sure that we never try to execute a 0xffffffff instruction and
 530    avoid the kernel bug.  The second NOP is needed to keep the call
 531    dummy 8 byte aligned.  */
 532
 533 /* Define offsets into the call dummy for the target function address */
 534 #define FUNC_LDIL_OFFSET (INSTRUCTION_SIZE * 9)
 535 #define FUNC_LDO_OFFSET (INSTRUCTION_SIZE * 10)
 536
 537 /* Define offsets into the call dummy for the _sr4export address */
 538 #define SR4EXPORT_LDIL_OFFSET (INSTRUCTION_SIZE * 12)
 539 #define SR4EXPORT_LDO_OFFSET (INSTRUCTION_SIZE * 13)
 540
 541 #define CALL_DUMMY {0x4BDA3FB9, 0x4BD93FB1, 0x4BD83FA9, 0x4BD73FA1,\
 542                     0x37C13FB9, 0x24201004, 0x2C391005, 0x24311006,\
 543                     0x2C291007, 0x22C00000, 0x36D60000, 0x02C010A4,\
 544                     0x20200000, 0x34210000, 0x002010b4, 0x82842022,\
 545                     0xe6c06000, 0x081f0242, 0x00010004, 0x00151820,\
 546                     0xe6c00002, 0xe4202000, 0x6bdf3fd1, 0x00010004,\
 547                     0x00151820, 0xe6c00002, 0x08000240, 0x08000240}
 548
 549 #if !GDB_MULTI_ARCH
 550 #define CALL_DUMMY_LENGTH (INSTRUCTION_SIZE * 28)
 551 #endif
 552 #define REG_PARM_STACK_SPACE 16
 553
 554 //OBSOLETE #else /* defined PA_LEVEL_0 */
 555 //OBSOLETE
 556 //OBSOLETE /* FIXME: brobecker 2002-12-26.  PA_LEVEL_0 is only defined for the
 557 //OBSOLETE    hppa-pro target, which should be obsoleted soon.  The following
 558 //OBSOLETE    section will therefore not be included in the multiarch conversion.  */
 559 //OBSOLETE /* This is the call dummy for a level 0 PA.  Level 0's don't have space
 560 //OBSOLETE    registers (or floating point?), so we skip all that inter-space call stuff,
 561 //OBSOLETE    and avoid touching the fp regs.
 562 //OBSOLETE
 563 //OBSOLETE    call_dummy
 564 //OBSOLETE
 565 //OBSOLETE    ldw -36(%sp), %arg0
 566 //OBSOLETE    ldw -40(%sp), %arg1
 567 //OBSOLETE    ldw -44(%sp), %arg2
 568 //OBSOLETE    ldw -48(%sp), %arg3
 569 //OBSOLETE    ldil 0, %r31                 ; FUNC_LDIL_OFFSET must point here
 570 //OBSOLETE    ldo 0(%r31), %r31            ; FUNC_LDO_OFFSET must point here
 571 //OBSOLETE    ble 0(%sr0, %r31)
 572 //OBSOLETE    copy %r31, %r2
 573 //OBSOLETE    break 4, 8
 574 //OBSOLETE    nop                          ; restore_pc_queue expects these
 575 //OBSOLETE    bv,n 0(%r22)                 ; instructions to be here...
 576 //OBSOLETE    nop
 577 //OBSOLETE  */
 578 //OBSOLETE
 579 //OBSOLETE /* Define offsets into the call dummy for the target function address */
 580 //OBSOLETE #define FUNC_LDIL_OFFSET (INSTRUCTION_SIZE * 4)
 581 //OBSOLETE #define FUNC_LDO_OFFSET (INSTRUCTION_SIZE * 5)
 582 //OBSOLETE
 583 //OBSOLETE #define CALL_DUMMY {0x4bda3fb9, 0x4bd93fb1, 0x4bd83fa9, 0x4bd73fa1,\
 584 //OBSOLETE                  0x23e00000, 0x37ff0000, 0xe7e00000, 0x081f0242,\
 585 //OBSOLETE                  0x00010004, 0x08000240, 0xeac0c002, 0x08000240}
 586 //OBSOLETE
 587 //OBSOLETE #define CALL_DUMMY_LENGTH (INSTRUCTION_SIZE * 12)
 588 //OBSOLETE
 589 //OBSOLETE #endif /* defined PA_LEVEL_0 */
 590
 591 #if !GDB_MULTI_ARCH
 592 #define CALL_DUMMY_START_OFFSET 0
 593 #endif
 594
 595 /* If we've reached a trap instruction within the call dummy, then
 596    we'll consider that to mean that we've reached the call dummy's
 597    end after its successful completion. */
 598 #define CALL_DUMMY_HAS_COMPLETED(pc, sp, frame_address) \
 599   (DEPRECATED_PC_IN_CALL_DUMMY((pc), (sp), (frame_address)) && \
 600    (read_memory_integer((pc), 4) == BREAKPOINT32))
 601
 602 /*
 603  * Insert the specified number of args and function address
 604  * into a call sequence of the above form stored at DUMMYNAME.
 605  *
 606  * On the hppa we need to call the stack dummy through $$dyncall.
 607  * Therefore our version of FIX_CALL_DUMMY takes an extra argument,
 608  * real_pc, which is the location where gdb should start up the
 609  * inferior to do the function call.
 610  */
 611
 612 /* FIXME: brobecker 2002-12-26.  This macro is going to cause us some
 613    problems before we can go to multiarch partial as it has been diverted
 614    on HPUX to return the value of the PC!  */
 615 #define FIX_CALL_DUMMY hppa_fix_call_dummy
 616 extern CORE_ADDR hppa_fix_call_dummy (char *, CORE_ADDR, CORE_ADDR, int,
 617                                       struct value **, struct type *, int);
 618
 619 #if !GDB_MULTI_ARCH
 620 #define DEPRECATED_PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
 621   (hppa_push_arguments((nargs), (args), (sp), (struct_return), (struct_addr)))
 622 extern CORE_ADDR hppa_push_arguments (int, struct value **, CORE_ADDR, int,
 623                                       CORE_ADDR);
 624 #endif
 625
 626 \f
 627 #if !GDB_MULTI_ARCH
 628 extern CORE_ADDR hppa_smash_text_address (CORE_ADDR addr);
 629 #define SMASH_TEXT_ADDRESS(addr) hppa_smash_text_address (addr)
 630 #endif
 631
 632 #define GDB_TARGET_IS_HPPA
 633
 634 #if !GDB_MULTI_ARCH
 635 #define BELIEVE_PCC_PROMOTION 1
 636 #endif
 637
 638 /*
 639  * Unwind table and descriptor.
 640  */
 641
 642 struct unwind_table_entry
 643   {
 644     CORE_ADDR region_start;
 645     CORE_ADDR region_end;
 646
 647     unsigned int Cannot_unwind:1;       /* 0 */
 648     unsigned int Millicode:1;   /* 1 */
 649     unsigned int Millicode_save_sr0:1;  /* 2 */
 650     unsigned int Region_description:2;  /* 3..4 */
 651     unsigned int reserved1:1;   /* 5 */
 652     unsigned int Entry_SR:1;    /* 6 */
 653     unsigned int Entry_FR:4;    /* number saved *//* 7..10 */
 654     unsigned int Entry_GR:5;    /* number saved *//* 11..15 */
 655     unsigned int Args_stored:1; /* 16 */
 656     unsigned int Variable_Frame:1;      /* 17 */
 657     unsigned int Separate_Package_Body:1;       /* 18 */
 658     unsigned int Frame_Extension_Millicode:1;   /* 19 */
 659     unsigned int Stack_Overflow_Check:1;        /* 20 */
 660     unsigned int Two_Instruction_SP_Increment:1;        /* 21 */
 661     unsigned int Ada_Region:1;  /* 22 */
 662     unsigned int cxx_info:1;    /* 23 */
 663     unsigned int cxx_try_catch:1;       /* 24 */
 664     unsigned int sched_entry_seq:1;     /* 25 */
 665     unsigned int reserved2:1;   /* 26 */
 666     unsigned int Save_SP:1;     /* 27 */
 667     unsigned int Save_RP:1;     /* 28 */
 668     unsigned int Save_MRP_in_frame:1;   /* 29 */
 669     unsigned int extn_ptr_defined:1;    /* 30 */
 670     unsigned int Cleanup_defined:1;     /* 31 */
 671
 672     unsigned int MPE_XL_interrupt_marker:1;     /* 0 */
 673     unsigned int HP_UX_interrupt_marker:1;      /* 1 */
 674     unsigned int Large_frame:1; /* 2 */
 675     unsigned int Pseudo_SP_Set:1;       /* 3 */
 676     unsigned int reserved4:1;   /* 4 */
 677     unsigned int Total_frame_size:27;   /* 5..31 */
 678
 679     /* This is *NOT* part of an actual unwind_descriptor in an object
 680        file.  It is *ONLY* part of the "internalized" descriptors that
 681        we create from those in a file.
 682      */
 683     struct
 684       {
 685         unsigned int stub_type:4;       /* 0..3 */
 686         unsigned int padding:28;        /* 4..31 */
 687       }
 688     stub_unwind;
 689   };
 690
 691 /* HP linkers also generate unwinds for various linker-generated stubs.
 692    GDB reads in the stubs from the $UNWIND_END$ subspace, then
 693    "converts" them into normal unwind entries using some of the reserved
 694    fields to store the stub type.  */
 695
 696 struct stub_unwind_entry
 697   {
 698     /* The offset within the executable for the associated stub.  */
 699     unsigned stub_offset;
 700
 701     /* The type of stub this unwind entry describes.  */
 702     char type;
 703
 704     /* Unknown.  Not needed by GDB at this time.  */
 705     char prs_info;
 706
 707     /* Length (in instructions) of the associated stub.  */
 708     short stub_length;
 709   };
 710
 711 /* Sizes (in bytes) of the native unwind entries.  */
 712 #define UNWIND_ENTRY_SIZE 16
 713 #define STUB_UNWIND_ENTRY_SIZE 8
 714
 715 /* The gaps represent linker stubs used in MPE and space for future
 716    expansion.  */
 717 enum unwind_stub_types
 718   {
 719     LONG_BRANCH = 1,
 720     PARAMETER_RELOCATION = 2,
 721     EXPORT = 10,
 722     IMPORT = 11,
 723     IMPORT_SHLIB = 12,
 724   };
 725
 726 /* We use the objfile->obj_private pointer for two things:
 727
 728  * 1.  An unwind table;
 729  *
 730  * 2.  A pointer to any associated shared library object.
 731  *
 732  * #defines are used to help refer to these objects.
 733  */
 734
 735 /* Info about the unwind table associated with an object file.
 736
 737  * This is hung off of the "objfile->obj_private" pointer, and
 738  * is allocated in the objfile's psymbol obstack.  This allows
 739  * us to have unique unwind info for each executable and shared
 740  * library that we are debugging.
 741  */
 742 struct obj_unwind_info
 743   {
 744     struct unwind_table_entry *table;   /* Pointer to unwind info */
 745     struct unwind_table_entry *cache;   /* Pointer to last entry we found */
 746     int last;                   /* Index of last entry */
 747   };
 748
 749 typedef struct obj_private_struct
 750   {
 751     struct obj_unwind_info *unwind_info;        /* a pointer */
 752     struct so_list *so_info;    /* a pointer  */
 753     CORE_ADDR dp;
 754   }
 755 obj_private_data_t;
 756
 757 #if 0
 758 extern void target_write_pc (CORE_ADDR, int);
 759 extern CORE_ADDR target_read_pc (int);
 760 extern CORE_ADDR skip_trampoline_code (CORE_ADDR, char *);
 761 #endif
 762
 763 #if !GDB_MULTI_ARCH
 764 #define TARGET_READ_PC(pid) hppa_target_read_pc (pid)
 765 extern CORE_ADDR hppa_target_read_pc (ptid_t);
 766 #endif
 767
 768 #if !GDB_MULTI_ARCH
 769 #define TARGET_WRITE_PC(v,pid) hppa_target_write_pc (v,pid)
 770 extern void hppa_target_write_pc (CORE_ADDR, ptid_t);
 771 #endif
 772
 773 #if !GDB_MULTI_ARCH
 774 #define TARGET_READ_FP() hppa_target_read_fp ()
 775 extern CORE_ADDR hppa_target_read_fp (void);
 776 #endif
 777
 778 /* For a number of horrible reasons we may have to adjust the location
 779    of variables on the stack.  Ugh.  */
 780 #define HPREAD_ADJUST_STACK_ADDRESS(ADDR) hpread_adjust_stack_address(ADDR)
 781 extern int hpread_adjust_stack_address (CORE_ADDR);
 782
 783 /* Here's how to step off a permanent breakpoint.  */
 784 #define SKIP_PERMANENT_BREAKPOINT (hppa_skip_permanent_breakpoint)
 785 extern void hppa_skip_permanent_breakpoint (void);
 786
 787 /* On HP-UX, certain system routines (millicode) have names beginning
 788    with $ or $$, e.g. $$dyncall, which handles inter-space procedure
 789    calls on PA-RISC.  Tell the expression parser to check for those
 790    when parsing tokens that begin with "$".  */
 791 #define SYMBOLS_CAN_START_WITH_DOLLAR (1)