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