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2003-03-26 Andrew Cagney <cagney@redhat.com>
[deliverable/binutils-gdb.git] / gdb / config / pa / tm-hppa.h
CommitLineData
c906108c 1/* Parameters for execution on any Hewlett-Packard PA-RISC machine.
b6ba6518 2 Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
1e698235 3 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
c906108c
SS		 4
5 Contributed by the Center for Software Science at the
6 University of Utah (pa-gdb-bugs@cs.utah.edu).
7
c5aa993b 8 This file is part of GDB.
c906108c 9
c5aa993b
JM		 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.
c906108c 14
c5aa993b
JM		 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.
c906108c 19
c5aa993b
JM		 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. */
c906108c 24
f88e2c52
AC		 25#include "regcache.h"
26
e6e68f1f
JB		 27#define GDB_MULTI_ARCH 0
28
e92b0cc9 29/* NOTE: cagney/2002-11-24: This is a guess. */
07555a72 30#define DEPRECATED_USE_GENERIC_DUMMY_FRAMES 0
e92b0cc9 31#define CALL_DUMMY_LOCATION ON_STACK
ae45cd16 32#define DEPRECATED_PC_IN_CALL_DUMMY(pc, sp, frame_address) deprecated_pc_in_call_dummy_on_stack (pc, sp, frame_address)
a5afb99f 33#define DEPRECATED_INIT_FRAME_PC(l,f) (init_frame_pc_default (l, f))
e92b0cc9 34
c906108c
SS		 35/* Forward declarations of some types we use in prototypes */
36
c906108c
SS		 37struct frame_info;
38struct frame_saved_regs;
39struct value;
40struct type;
41struct inferior_status;
c906108c 42
c906108c
SS		 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
60383d10 61#if !GDB_MULTI_ARCH
d709c020
JB		 62extern int hppa_reg_struct_has_addr (int gcc_p, struct type *type);
63#define REG_STRUCT_HAS_ADDR(gcc_p,type) hppa_reg_struct_has_addr (gcc_p,type)
60383d10 64#endif
c906108c
SS		 65
66/* Offset from address of function to start of its code.
67 Zero on most machines. */
68
60383d10 69#if !GDB_MULTI_ARCH
c906108c 70#define FUNCTION_START_OFFSET 0
60383d10 71#endif
c5aa993b 72
c906108c
SS		 73/* Advance PC across any function entry prologue instructions
74 to reach some "real" code. */
75
60383d10 76#if !GDB_MULTI_ARCH
a14ed312 77extern CORE_ADDR hppa_skip_prologue (CORE_ADDR);
b83266a0 78#define SKIP_PROLOGUE(pc) (hppa_skip_prologue (pc))
60383d10 79#endif
c906108c
SS		 80
81/* If PC is in some function-call trampoline code, return the PC
82 where the function itself actually starts. If not, return NULL. */
83
60383d10
JB		 84#if !GDB_MULTI_ARCH
85#define SKIP_TRAMPOLINE_CODE(pc) hppa_skip_trampoline_code (pc)
86extern CORE_ADDR hppa_skip_trampoline_code (CORE_ADDR);
87#endif
c906108c
SS		 88
89/* Return non-zero if we are in an appropriate trampoline. */
90
60383d10 91#if !GDB_MULTI_ARCH
c906108c 92#define IN_SOLIB_CALL_TRAMPOLINE(pc, name) \
60383d10
JB		 93 hppa_in_solib_call_trampoline (pc, name)
94extern int hppa_in_solib_call_trampoline (CORE_ADDR, char *);
95#endif
c906108c 96
60383d10 97#if !GDB_MULTI_ARCH
c906108c 98#define IN_SOLIB_RETURN_TRAMPOLINE(pc, name) \
60383d10
JB		 99 hppa_in_solib_return_trampoline (pc, name)
100extern int hppa_in_solib_return_trampoline (CORE_ADDR, char *);
101#endif
c906108c 102
60383d10 103#if !GDB_MULTI_ARCH
c906108c 104#undef SAVED_PC_AFTER_CALL
60383d10
JB		 105#define SAVED_PC_AFTER_CALL(frame) hppa_saved_pc_after_call (frame)
106extern CORE_ADDR hppa_saved_pc_after_call (struct frame_info *);
107#endif
c906108c 108
60383d10 109#if !GDB_MULTI_ARCH
d709c020
JB		 110extern int hppa_inner_than (CORE_ADDR lhs, CORE_ADDR rhs);
111#define INNER_THAN(lhs,rhs) hppa_inner_than(lhs,rhs)
60383d10 112#endif
c906108c 113
60383d10 114#if !GDB_MULTI_ARCH
d709c020
JB		 115extern CORE_ADDR hppa_stack_align (CORE_ADDR sp);
116#define STACK_ALIGN(sp) hppa_stack_align (sp)
60383d10 117#endif
c906108c 118
c906108c
SS		 119/* Sequence of bytes for breakpoint instruction. */
120
121#define BREAKPOINT {0x00, 0x01, 0x00, 0x04}
122#define BREAKPOINT32 0x10004
123
124/* Amount PC must be decremented by after a breakpoint.
125 This is often the number of bytes in BREAKPOINT
126 but not always.
127
128 Not on the PA-RISC */
129
60383d10 130#if !GDB_MULTI_ARCH
c906108c 131#define DECR_PC_AFTER_BREAK 0
60383d10 132#endif
c906108c 133
d709c020
JB		 134extern int hppa_pc_requires_run_before_use (CORE_ADDR pc);
135#define PC_REQUIRES_RUN_BEFORE_USE(pc) hppa_pc_requires_run_before_use (pc)
c906108c
SS		 136
137/* Say how long (ordinary) registers are. This is a piece of bogosity
138 used in push_word and a few other places; REGISTER_RAW_SIZE is the
139 real way to know how big a register is. */
140
60383d10 141#if !GDB_MULTI_ARCH
c906108c 142#define REGISTER_SIZE 4
60383d10 143#endif
c906108c
SS		 144
145/* Number of machine registers */
146
60383d10 147#if !GDB_MULTI_ARCH
c906108c 148#define NUM_REGS 128
60383d10 149#endif
c906108c
SS		 150
151/* Initializer for an array of names of registers.
152 There should be NUM_REGS strings in this initializer.
153 They are in rows of eight entries */
154
155#define REGISTER_NAMES \
156 {"flags", "r1", "rp", "r3", "r4", "r5", "r6", "r7", \
157 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \
158 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \
159 "r24", "r25", "r26", "dp", "ret0", "ret1", "sp", "r31", \
160 "sar", "pcoqh", "pcsqh", "pcoqt", "pcsqt", "eiem", "iir", "isr", \
161 "ior", "ipsw", "goto", "sr4", "sr0", "sr1", "sr2", "sr3", \
162 "sr5", "sr6", "sr7", "cr0", "cr8", "cr9", "ccr", "cr12", \
163 "cr13", "cr24", "cr25", "cr26", "mpsfu_high","mpsfu_low","mpsfu_ovflo","pad",\
164 "fpsr", "fpe1", "fpe2", "fpe3", "fpe4", "fpe5", "fpe6", "fpe7", \
165 "fr4", "fr4R", "fr5", "fr5R", "fr6", "fr6R", "fr7", "fr7R", \
166 "fr8", "fr8R", "fr9", "fr9R", "fr10", "fr10R", "fr11", "fr11R", \
167 "fr12", "fr12R", "fr13", "fr13R", "fr14", "fr14R", "fr15", "fr15R", \
168 "fr16", "fr16R", "fr17", "fr17R", "fr18", "fr18R", "fr19", "fr19R", \
169 "fr20", "fr20R", "fr21", "fr21R", "fr22", "fr22R", "fr23", "fr23R", \
170 "fr24", "fr24R", "fr25", "fr25R", "fr26", "fr26R", "fr27", "fr27R", \
171 "fr28", "fr28R", "fr29", "fr29R", "fr30", "fr30R", "fr31", "fr31R"}
172
173/* Register numbers of various important registers.
174 Note that some of these values are "real" register numbers,
175 and correspond to the general registers of the machine,
176 and some are "phony" register numbers which are too large
177 to be actual register numbers as far as the user is concerned
178 but do serve to get the desired values when passed to read_register. */
179
180#define R0_REGNUM 0 /* Doesn't actually exist, used as base for
181 other r registers. */
182#define FLAGS_REGNUM 0 /* Various status flags */
183#define RP_REGNUM 2 /* return pointer */
60383d10 184#if !GDB_MULTI_ARCH
c906108c
SS		 185#define FP_REGNUM 3 /* Contains address of executing stack */
186 /* frame */
60383d10
JB		 187#endif
188#if !GDB_MULTI_ARCH
c906108c 189#define SP_REGNUM 30 /* Contains address of top of stack */
60383d10 190#endif
c906108c
SS		 191#define SAR_REGNUM 32 /* Shift Amount Register */
192#define IPSW_REGNUM 41 /* Interrupt Processor Status Word */
193#define PCOQ_HEAD_REGNUM 33 /* instruction offset queue head */
194#define PCSQ_HEAD_REGNUM 34 /* instruction space queue head */
195#define PCOQ_TAIL_REGNUM 35 /* instruction offset queue tail */
196#define PCSQ_TAIL_REGNUM 36 /* instruction space queue tail */
197#define EIEM_REGNUM 37 /* External Interrupt Enable Mask */
198#define IIR_REGNUM 38 /* Interrupt Instruction Register */
199#define IOR_REGNUM 40 /* Interrupt Offset Register */
200#define SR4_REGNUM 43 /* space register 4 */
201#define RCR_REGNUM 51 /* Recover Counter (also known as cr0) */
202#define CCR_REGNUM 54 /* Coprocessor Configuration Register */
203#define TR0_REGNUM 57 /* Temporary Registers (cr24 -> cr31) */
c5aa993b 204#define CR27_REGNUM 60 /* Base register for thread-local storage, cr27 */
60383d10 205#if !GDB_MULTI_ARCH
c5aa993b 206#define FP0_REGNUM 64 /* floating point reg. 0 (fspr) */
60383d10 207#endif
c906108c
SS		 208#define FP4_REGNUM 72
209
c5aa993b
JM		 210#define ARG0_REGNUM 26 /* The first argument of a callee. */
211#define ARG1_REGNUM 25 /* The second argument of a callee. */
212#define ARG2_REGNUM 24 /* The third argument of a callee. */
213#define ARG3_REGNUM 23 /* The fourth argument of a callee. */
c906108c
SS		 214
215/* compatibility with the rest of gdb. */
60383d10 216#if !GDB_MULTI_ARCH
c906108c 217#define PC_REGNUM PCOQ_HEAD_REGNUM
60383d10
JB		 218#endif
219#if !GDB_MULTI_ARCH
c906108c 220#define NPC_REGNUM PCOQ_TAIL_REGNUM
60383d10 221#endif
c906108c
SS		 222
223/*
224 * Processor Status Word Masks
225 */
226
c5aa993b
JM		 227#define PSW_T 0x01000000 /* Taken Branch Trap Enable */
228#define PSW_H 0x00800000 /* Higher-Privilege Transfer Trap Enable */
229#define PSW_L 0x00400000 /* Lower-Privilege Transfer Trap Enable */
230#define PSW_N 0x00200000 /* PC Queue Front Instruction Nullified */
231#define PSW_X 0x00100000 /* Data Memory Break Disable */
232#define PSW_B 0x00080000 /* Taken Branch in Previous Cycle */
233#define PSW_C 0x00040000 /* Code Address Translation Enable */
234#define PSW_V 0x00020000 /* Divide Step Correction */
235#define PSW_M 0x00010000 /* High-Priority Machine Check Disable */
236#define PSW_CB 0x0000ff00 /* Carry/Borrow Bits */
237#define PSW_R 0x00000010 /* Recovery Counter Enable */
238#define PSW_Q 0x00000008 /* Interruption State Collection Enable */
239#define PSW_P 0x00000004 /* Protection ID Validation Enable */
240#define PSW_D 0x00000002 /* Data Address Translation Enable */
241#define PSW_I 0x00000001 /* External, Power Failure, Low-Priority */
242 /* Machine Check Interruption Enable */
c906108c
SS		 243
244/* When fetching register values from an inferior or a core file,
245 clean them up using this macro. BUF is a char pointer to
246 the raw value of the register in the registers[] array. */
247
4ee3352d 248#define DEPRECATED_CLEAN_UP_REGISTER_VALUE(regno, buf) \
c906108c
SS		 249 do { \
250 if ((regno) == PCOQ_HEAD_REGNUM || (regno) == PCOQ_TAIL_REGNUM) \
7be570e7 251 (buf)[sizeof(CORE_ADDR) -1] &= ~0x3; \
c906108c
SS		 252 } while (0)
253
778ce8cc
AC		 254/* Define DEPRECATED_DO_REGISTERS_INFO() to do machine-specific
255 formatting of register dumps. */
c906108c 256
778ce8cc 257#define DEPRECATED_DO_REGISTERS_INFO(_regnum, fp) pa_do_registers_info (_regnum, fp)
a14ed312 258extern void pa_do_registers_info (int, int);
c906108c
SS		 259
260#if 0
261#define STRCAT_REGISTER(regnum, fpregs, stream, precision) pa_do_strcat_registers_info (regnum, fpregs, stream, precision)
d9fcf2fb 262extern void pa_do_strcat_registers_info (int, int, struct ui_file *, enum precision_type);
c906108c
SS		 263#endif
264
265/* PA specific macro to see if the current instruction is nullified. */
266#ifndef INSTRUCTION_NULLIFIED
d709c020
JB		 267extern int hppa_instruction_nullified (void);
268#define INSTRUCTION_NULLIFIED hppa_instruction_nullified ()
c906108c
SS		 269#endif
270
271/* Number of bytes of storage in the actual machine representation
272 for register N. On the PA-RISC, all regs are 4 bytes, including
273 the FP registers (they're accessed as two 4 byte halves). */
274
60383d10 275#if !GDB_MULTI_ARCH
60e1ff27
JB		 276extern int hppa_register_raw_size (int reg_nr);
277#define REGISTER_RAW_SIZE(N) hppa_register_raw_size (N)
60383d10 278#endif
c906108c
SS		 279
280/* Total amount of space needed to store our copies of the machine's
281 register state, the array `registers'. */
60383d10 282#if !GDB_MULTI_ARCH
c906108c 283#define REGISTER_BYTES (NUM_REGS * 4)
60383d10 284#endif
c906108c 285
60383d10 286#if !GDB_MULTI_ARCH
d709c020
JB		 287extern int hppa_register_byte (int reg_nr);
288#define REGISTER_BYTE(N) hppa_register_byte (N)
60383d10 289#endif
c906108c
SS		 290
291/* Number of bytes of storage in the program's representation
292 for register N. */
293
60383d10 294#if !GDB_MULTI_ARCH
c906108c 295#define REGISTER_VIRTUAL_SIZE(N) REGISTER_RAW_SIZE(N)
60383d10 296#endif
c906108c
SS		 297
298/* Largest value REGISTER_RAW_SIZE can have. */
299
60383d10 300#if !GDB_MULTI_ARCH
a0ed5532 301#define DEPRECATED_MAX_REGISTER_RAW_SIZE 4
60383d10 302#endif
c906108c
SS		 303
304/* Largest value REGISTER_VIRTUAL_SIZE can have. */
305
60383d10 306#if !GDB_MULTI_ARCH
a0ed5532 307#define DEPRECATED_MAX_REGISTER_VIRTUAL_SIZE 8
60383d10 308#endif
c906108c 309
60383d10 310#if !GDB_MULTI_ARCH
d709c020
JB		 311extern struct type * hppa_register_virtual_type (int reg_nr);
312#define REGISTER_VIRTUAL_TYPE(N) hppa_register_virtual_type (N)
60383d10 313#endif
c906108c 314
60383d10 315#if !GDB_MULTI_ARCH
d709c020
JB		 316extern void hppa_store_struct_return (CORE_ADDR addr, CORE_ADDR sp);
317#define STORE_STRUCT_RETURN(ADDR, SP) hppa_store_struct_return (ADDR, SP)
60383d10 318#endif
c906108c
SS		 319
320/* Extract from an array REGBUF containing the (raw) register state
321 a function return value of type TYPE, and copy that, in virtual format,
1cdb71fe 322 into VALBUF. */
c906108c 323
60383d10 324#if !GDB_MULTI_ARCH
61d8d407 325void hppa_extract_return_value (struct type *type, char *regbuf, char *valbuf);
26e9b323 326#define DEPRECATED_EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
1cdb71fe 327 hppa_extract_return_value (TYPE, REGBUF, VALBUF);
60383d10 328#endif
c906108c
SS		 329
330 /* elz: decide whether the function returning a value of type type
331 will put it on the stack or in the registers.
332 The pa calling convention says that:
333 register 28 (called ret0 by gdb) contains any ASCII char,
334 and any non_floating point value up to 32-bits.
335 reg 28 and 29 contain non-floating point up tp 64 bits and larger
336 than 32 bits. (higer order word in reg 28).
337 fr4: floating point up to 64 bits
338 sr1: space identifier (32-bit)
339 stack: any lager than 64-bit, with the address in r28
c5aa993b 340 */
60383d10 341#if !GDB_MULTI_ARCH
c906108c
SS		 342extern use_struct_convention_fn hppa_use_struct_convention;
343#define USE_STRUCT_CONVENTION(gcc_p,type) hppa_use_struct_convention (gcc_p,type)
60383d10 344#endif
c906108c
SS		 345
346/* Write into appropriate registers a function return value
1cdb71fe 347 of type TYPE, given in virtual format. */
c906108c 348
60383d10 349#if !GDB_MULTI_ARCH
61d8d407 350extern void hppa_store_return_value (struct type *type, char *valbuf);
ebba8386 351#define DEPRECATED_STORE_RETURN_VALUE(TYPE,VALBUF) \
1cdb71fe 352 hppa_store_return_value (TYPE, VALBUF);
60383d10 353#endif
c906108c 354
60383d10
JB		 355#if !GDB_MULTI_ARCH
356extern CORE_ADDR hppa_extract_struct_value_address (char *regbuf);
26e9b323 357#define DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
60383d10
JB		 358 hppa_extract_struct_value_address (REGBUF)
359#endif
c906108c
SS		 360
361/* elz: Return a large value, which is stored on the stack at addr.
26e9b323
AC		 362 This is defined only for the hppa, at this moment. The above macro
363 DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS is not called anymore,
364 because it assumes that on exit from a called function which
365 returns a large structure on the stack, the address of the ret
366 structure is still in register 28. Unfortunately this register is
367 usually overwritten by the called function itself, on hppa. This is
368 specified in the calling convention doc. As far as I know, the only
369 way to get the return value is to have the caller tell us where it
370 told the callee to put it, rather than have the callee tell us. */
61d8d407
AC		 371struct value *hppa_value_returned_from_stack (register struct type *valtype,
372 CORE_ADDR addr);
c906108c
SS		 373#define VALUE_RETURNED_FROM_STACK(valtype,addr) \
374 hppa_value_returned_from_stack (valtype, addr)
375
60383d10 376#if !GDB_MULTI_ARCH
d709c020
JB		 377extern int hppa_cannot_store_register (int regnum);
378#define CANNOT_STORE_REGISTER(regno) hppa_cannot_store_register (regno)
60383d10 379#endif
c906108c 380
60383d10 381#if !GDB_MULTI_ARCH
e9582e71 382#define DEPRECATED_INIT_EXTRA_FRAME_INFO(fromleaf, frame) hppa_init_extra_frame_info (fromleaf, frame)
60383d10
JB		 383extern void hppa_init_extra_frame_info (int, struct frame_info *);
384#endif
c906108c
SS		 385
386/* Describe the pointer in each stack frame to the previous stack frame
387 (its caller). */
388
618ce49f
AC		 389/* DEPRECATED_FRAME_CHAIN takes a frame's nominal address and produces
390 the frame's chain-pointer. */
c906108c
SS		 391
392/* In the case of the PA-RISC, the frame's nominal address
393 is the address of a 4-byte word containing the calling frame's
394 address (previous FP). */
395
60383d10 396#if !GDB_MULTI_ARCH
618ce49f 397#define DEPRECATED_FRAME_CHAIN(thisframe) hppa_frame_chain (thisframe)
60383d10
JB		 398extern CORE_ADDR hppa_frame_chain (struct frame_info *);
399#endif
c906108c 400
60383d10 401#if !GDB_MULTI_ARCH
a14ed312 402extern int hppa_frame_chain_valid (CORE_ADDR, struct frame_info *);
618ce49f 403#define DEPRECATED_FRAME_CHAIN_VALID(chain, thisframe) hppa_frame_chain_valid (chain, thisframe)
60383d10 404#endif
c906108c 405
c906108c
SS		 406/* Define other aspects of the stack frame. */
407
408/* A macro that tells us whether the function invocation represented
409 by FI does not have a frame on the stack associated with it. If it
410 does not, FRAMELESS is set to 1, else 0. */
60383d10 411#if !GDB_MULTI_ARCH
392a587b 412#define FRAMELESS_FUNCTION_INVOCATION(FI) \
60383d10
JB		 413 (hppa_frameless_function_invocation (FI))
414extern int hppa_frameless_function_invocation (struct frame_info *);
415#endif
c906108c 416
60383d10 417#if !GDB_MULTI_ARCH
a14ed312 418extern CORE_ADDR hppa_frame_saved_pc (struct frame_info *frame);
8bedc050 419#define DEPRECATED_FRAME_SAVED_PC(FRAME) hppa_frame_saved_pc (FRAME)
60383d10 420#endif
c906108c 421
60383d10 422#if !GDB_MULTI_ARCH
d709c020
JB		 423extern CORE_ADDR hppa_frame_args_address (struct frame_info *fi);
424#define FRAME_ARGS_ADDRESS(fi) hppa_frame_args_address (fi)
60383d10 425#endif
d709c020 426
60383d10 427#if !GDB_MULTI_ARCH
d709c020
JB		 428extern CORE_ADDR hppa_frame_locals_address (struct frame_info *fi);
429#define FRAME_LOCALS_ADDRESS(fi) hppa_frame_locals_address (fi)
60383d10 430#endif
c906108c 431
60383d10
JB		 432#if !GDB_MULTI_ARCH
433extern int hppa_frame_num_args (struct frame_info *frame);
434#define FRAME_NUM_ARGS(fi) hppa_frame_num_args (fi)
435#endif
c906108c 436
60383d10 437#if !GDB_MULTI_ARCH
c906108c 438#define FRAME_ARGS_SKIP 0
60383d10 439#endif
c906108c
SS		 440
441#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
442 hppa_frame_find_saved_regs (frame_info, &frame_saved_regs)
570b8f7c
AC		 443extern void hppa_frame_find_saved_regs (struct frame_info *,
444 struct frame_saved_regs *);
c906108c 445\f
c5aa993b 446
c906108c
SS		 447/* Things needed for making the inferior call functions. */
448
5ef7553b 449#if !GDB_MULTI_ARCH
7daf4f5b
JB		 450#define DEPRECATED_PUSH_DUMMY_FRAME hppa_push_dummy_frame ()
451extern void hppa_push_dummy_frame (void);
5ef7553b 452#endif
c906108c
SS		 453
454/* Discard from the stack the innermost frame,
455 restoring all saved registers. */
60383d10 456#if !GDB_MULTI_ARCH
749b82f6 457#define DEPRECATED_POP_FRAME hppa_pop_frame ()
a14ed312 458extern void hppa_pop_frame (void);
60383d10 459#endif
c906108c
SS		 460
461#define INSTRUCTION_SIZE 4
462
463#ifndef PA_LEVEL_0
464
465/* Non-level zero PA's have space registers (but they don't always have
466 floating-point, do they???? */
467
468/* This sequence of words is the instructions
469
c5aa993b
JM		 470 ; Call stack frame has already been built by gdb. Since we could be calling
471 ; a varargs function, and we do not have the benefit of a stub to put things in
472 ; the right place, we load the first 4 word of arguments into both the general
473 ; and fp registers.
474 call_dummy
475 ldw -36(sp), arg0
476 ldw -40(sp), arg1
477 ldw -44(sp), arg2
478 ldw -48(sp), arg3
479 ldo -36(sp), r1
480 fldws 0(0, r1), fr4
481 fldds -4(0, r1), fr5
482 fldws -8(0, r1), fr6
483 fldds -12(0, r1), fr7
484 ldil 0, r22 ; FUNC_LDIL_OFFSET must point here
485 ldo 0(r22), r22 ; FUNC_LDO_OFFSET must point here
486 ldsid (0,r22), r4
487 ldil 0, r1 ; SR4EXPORT_LDIL_OFFSET must point here
488 ldo 0(r1), r1 ; SR4EXPORT_LDO_OFFSET must point here
489 ldsid (0,r1), r20
490 combt,=,n r4, r20, text_space ; If target is in data space, do a
491 ble 0(sr5, r22) ; "normal" procedure call
492 copy r31, r2
493 break 4, 8
494 mtsp r21, sr0
495 ble,n 0(sr0, r22)
496 text_space ; Otherwise, go through _sr4export,
497 ble (sr4, r1) ; which will return back here.
498 stw r31,-24(r30)
499 break 4, 8
500 mtsp r21, sr0
501 ble,n 0(sr0, r22)
502 nop ; To avoid kernel bugs
503 nop ; and keep the dummy 8 byte aligned
c906108c
SS		 504
505 The dummy decides if the target is in text space or data space. If
506 it's in data space, there's no problem because the target can
507 return back to the dummy. However, if the target is in text space,
508 the dummy calls the secret, undocumented routine _sr4export, which
509 calls a function in text space and can return to any space. Instead
510 of including fake instructions to represent saved registers, we
511 know that the frame is associated with the call dummy and treat it
512 specially.
513
514 The trailing NOPs are needed to avoid a bug in HPUX, BSD and OSF1
515 kernels. If the memory at the location pointed to by the PC is
516 0xffffffff then a ptrace step call will fail (even if the instruction
517 is nullified).
518
519 The code to pop a dummy frame single steps three instructions
520 starting with the last mtsp. This includes the nullified "instruction"
521 following the ble (which is uninitialized junk). If the
522 "instruction" following the last BLE is 0xffffffff, then the ptrace
523 will fail and the dummy frame is not correctly popped.
524
525 By placing a NOP in the delay slot of the BLE instruction we can be
526 sure that we never try to execute a 0xffffffff instruction and
527 avoid the kernel bug. The second NOP is needed to keep the call
528 dummy 8 byte aligned. */
529
530/* Define offsets into the call dummy for the target function address */
531#define FUNC_LDIL_OFFSET (INSTRUCTION_SIZE * 9)
532#define FUNC_LDO_OFFSET (INSTRUCTION_SIZE * 10)
533
534/* Define offsets into the call dummy for the _sr4export address */
535#define SR4EXPORT_LDIL_OFFSET (INSTRUCTION_SIZE * 12)
536#define SR4EXPORT_LDO_OFFSET (INSTRUCTION_SIZE * 13)
537
538#define CALL_DUMMY {0x4BDA3FB9, 0x4BD93FB1, 0x4BD83FA9, 0x4BD73FA1,\
539 0x37C13FB9, 0x24201004, 0x2C391005, 0x24311006,\
540 0x2C291007, 0x22C00000, 0x36D60000, 0x02C010A4,\
541 0x20200000, 0x34210000, 0x002010b4, 0x82842022,\
542 0xe6c06000, 0x081f0242, 0x00010004, 0x00151820,\
543 0xe6c00002, 0xe4202000, 0x6bdf3fd1, 0x00010004,\
544 0x00151820, 0xe6c00002, 0x08000240, 0x08000240}
545
60383d10 546#if !GDB_MULTI_ARCH
c906108c 547#define CALL_DUMMY_LENGTH (INSTRUCTION_SIZE * 28)
60383d10 548#endif
7be570e7 549#define REG_PARM_STACK_SPACE 16
c906108c
SS		 550
551#else /* defined PA_LEVEL_0 */
552
60383d10
JB		 553/* FIXME: brobecker 2002-12-26. PA_LEVEL_0 is only defined for the
554 hppa-pro target, which should be obsoleted soon. The following
555 section will therefore not be included in the multiarch conversion. */
c906108c 556/* This is the call dummy for a level 0 PA. Level 0's don't have space
1faa59a8 557 registers (or floating point?), so we skip all that inter-space call stuff,
c906108c
SS		 558 and avoid touching the fp regs.
559
c5aa993b
JM		 560 call_dummy
561
562 ldw -36(%sp), %arg0
563 ldw -40(%sp), %arg1
564 ldw -44(%sp), %arg2
565 ldw -48(%sp), %arg3
566 ldil 0, %r31 ; FUNC_LDIL_OFFSET must point here
567 ldo 0(%r31), %r31 ; FUNC_LDO_OFFSET must point here
568 ble 0(%sr0, %r31)
569 copy %r31, %r2
570 break 4, 8
571 nop ; restore_pc_queue expects these
572 bv,n 0(%r22) ; instructions to be here...
573 nop
574 */
c906108c
SS		 575
576/* Define offsets into the call dummy for the target function address */
577#define FUNC_LDIL_OFFSET (INSTRUCTION_SIZE * 4)
578#define FUNC_LDO_OFFSET (INSTRUCTION_SIZE * 5)
579
580#define CALL_DUMMY {0x4bda3fb9, 0x4bd93fb1, 0x4bd83fa9, 0x4bd73fa1,\
581 0x23e00000, 0x37ff0000, 0xe7e00000, 0x081f0242,\
582 0x00010004, 0x08000240, 0xeac0c002, 0x08000240}
583
584#define CALL_DUMMY_LENGTH (INSTRUCTION_SIZE * 12)
585
60383d10 586#endif /* defined PA_LEVEL_0 */
c906108c 587
60383d10 588#if !GDB_MULTI_ARCH
c906108c 589#define CALL_DUMMY_START_OFFSET 0
60383d10 590#endif
c906108c
SS		 591
592/* If we've reached a trap instruction within the call dummy, then
593 we'll consider that to mean that we've reached the call dummy's
594 end after its successful completion. */
595#define CALL_DUMMY_HAS_COMPLETED(pc, sp, frame_address) \
ae45cd16 596 (DEPRECATED_PC_IN_CALL_DUMMY((pc), (sp), (frame_address)) && \
c906108c
SS		 597 (read_memory_integer((pc), 4) == BREAKPOINT32))
598
599/*
600 * Insert the specified number of args and function address
601 * into a call sequence of the above form stored at DUMMYNAME.
602 *
603 * On the hppa we need to call the stack dummy through $$dyncall.
604 * Therefore our version of FIX_CALL_DUMMY takes an extra argument,
605 * real_pc, which is the location where gdb should start up the
606 * inferior to do the function call.
607 */
608
60383d10
JB		 609/* FIXME: brobecker 2002-12-26. This macro is going to cause us some
610 problems before we can go to multiarch partial as it has been diverted
611 on HPUX to return the value of the PC! */
c906108c 612#define FIX_CALL_DUMMY hppa_fix_call_dummy
60383d10
JB		 613extern CORE_ADDR hppa_fix_call_dummy (char *, CORE_ADDR, CORE_ADDR, int,
614 struct value **, struct type *, int);
c906108c 615
60383d10 616#if !GDB_MULTI_ARCH
b81774d8 617#define DEPRECATED_PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
392a587b 618 (hppa_push_arguments((nargs), (args), (sp), (struct_return), (struct_addr)))
570b8f7c
AC		 619extern CORE_ADDR hppa_push_arguments (int, struct value **, CORE_ADDR, int,
620 CORE_ADDR);
60383d10
JB		 621#endif
622
c906108c 623\f
60383d10 624#if !GDB_MULTI_ARCH
d709c020
JB		 625extern CORE_ADDR hppa_smash_text_address (CORE_ADDR addr);
626#define SMASH_TEXT_ADDRESS(addr) hppa_smash_text_address (addr)
60383d10 627#endif
c906108c
SS		 628
629#define GDB_TARGET_IS_HPPA
630
60383d10 631#if !GDB_MULTI_ARCH
c906108c 632#define BELIEVE_PCC_PROMOTION 1
60383d10 633#endif
c906108c
SS		 634
635/*
636 * Unwind table and descriptor.
637 */
638
c5aa993b
JM		 639struct unwind_table_entry
640 {
7be570e7
JM		 641 CORE_ADDR region_start;
642 CORE_ADDR region_end;
c5aa993b
JM		 643
644 unsigned int Cannot_unwind:1; /* 0 */
645 unsigned int Millicode:1; /* 1 */
646 unsigned int Millicode_save_sr0:1; /* 2 */
647 unsigned int Region_description:2; /* 3..4 */
648 unsigned int reserved1:1; /* 5 */
649 unsigned int Entry_SR:1; /* 6 */
650 unsigned int Entry_FR:4; /* number saved *//* 7..10 */
651 unsigned int Entry_GR:5; /* number saved *//* 11..15 */
652 unsigned int Args_stored:1; /* 16 */
653 unsigned int Variable_Frame:1; /* 17 */
654 unsigned int Separate_Package_Body:1; /* 18 */
655 unsigned int Frame_Extension_Millicode:1; /* 19 */
656 unsigned int Stack_Overflow_Check:1; /* 20 */
657 unsigned int Two_Instruction_SP_Increment:1; /* 21 */
658 unsigned int Ada_Region:1; /* 22 */
659 unsigned int cxx_info:1; /* 23 */
660 unsigned int cxx_try_catch:1; /* 24 */
661 unsigned int sched_entry_seq:1; /* 25 */
662 unsigned int reserved2:1; /* 26 */
663 unsigned int Save_SP:1; /* 27 */
664 unsigned int Save_RP:1; /* 28 */
665 unsigned int Save_MRP_in_frame:1; /* 29 */
666 unsigned int extn_ptr_defined:1; /* 30 */
667 unsigned int Cleanup_defined:1; /* 31 */
668
669 unsigned int MPE_XL_interrupt_marker:1; /* 0 */
670 unsigned int HP_UX_interrupt_marker:1; /* 1 */
671 unsigned int Large_frame:1; /* 2 */
672 unsigned int Pseudo_SP_Set:1; /* 3 */
673 unsigned int reserved4:1; /* 4 */
674 unsigned int Total_frame_size:27; /* 5..31 */
675
676 /* This is *NOT* part of an actual unwind_descriptor in an object
677 file. It is *ONLY* part of the "internalized" descriptors that
678 we create from those in a file.
c906108c 679 */
c5aa993b
JM		 680 struct
681 {
682 unsigned int stub_type:4; /* 0..3 */
683 unsigned int padding:28; /* 4..31 */
684 }
685 stub_unwind;
686 };
c906108c
SS		 687
688/* HP linkers also generate unwinds for various linker-generated stubs.
689 GDB reads in the stubs from the $UNWIND_END$ subspace, then
690 "converts" them into normal unwind entries using some of the reserved
691 fields to store the stub type. */
692
693struct stub_unwind_entry
c5aa993b
JM		 694 {
695 /* The offset within the executable for the associated stub. */
696 unsigned stub_offset;
c906108c 697
c5aa993b
JM		 698 /* The type of stub this unwind entry describes. */
699 char type;
c906108c 700
c5aa993b
JM		 701 /* Unknown. Not needed by GDB at this time. */
702 char prs_info;
c906108c 703
c5aa993b
JM		 704 /* Length (in instructions) of the associated stub. */
705 short stub_length;
706 };
c906108c
SS		 707
708/* Sizes (in bytes) of the native unwind entries. */
709#define UNWIND_ENTRY_SIZE 16
710#define STUB_UNWIND_ENTRY_SIZE 8
711
712/* The gaps represent linker stubs used in MPE and space for future
713 expansion. */
714enum unwind_stub_types
c5aa993b
JM		 715 {
716 LONG_BRANCH = 1,
717 PARAMETER_RELOCATION = 2,
718 EXPORT = 10,
719 IMPORT = 11,
720 IMPORT_SHLIB = 12,
721 };
c906108c
SS		 722
723/* We use the objfile->obj_private pointer for two things:
c5aa993b 724
c906108c
SS		 725 * 1. An unwind table;
726 *
727 * 2. A pointer to any associated shared library object.
728 *
729 * #defines are used to help refer to these objects.
730 */
c5aa993b 731
c906108c 732/* Info about the unwind table associated with an object file.
c5aa993b 733
c906108c
SS		 734 * This is hung off of the "objfile->obj_private" pointer, and
735 * is allocated in the objfile's psymbol obstack. This allows
736 * us to have unique unwind info for each executable and shared
737 * library that we are debugging.
738 */
c5aa993b
JM		 739struct obj_unwind_info
740 {
741 struct unwind_table_entry *table; /* Pointer to unwind info */
742 struct unwind_table_entry *cache; /* Pointer to last entry we found */
743 int last; /* Index of last entry */
744 };
745
746typedef struct obj_private_struct
747 {
748 struct obj_unwind_info *unwind_info; /* a pointer */
749 struct so_list *so_info; /* a pointer */
53a5351d 750 CORE_ADDR dp;
c5aa993b
JM		 751 }
752obj_private_data_t;
c906108c
SS		 753
754#if 0
a14ed312
KB		 755extern void target_write_pc (CORE_ADDR, int);
756extern CORE_ADDR target_read_pc (int);
757extern CORE_ADDR skip_trampoline_code (CORE_ADDR, char *);
c906108c
SS		 758#endif
759
60383d10
JB		 760#if !GDB_MULTI_ARCH
761#define TARGET_READ_PC(pid) hppa_target_read_pc (pid)
762extern CORE_ADDR hppa_target_read_pc (ptid_t);
763#endif
c906108c 764
60383d10
JB		 765#if !GDB_MULTI_ARCH
766#define TARGET_WRITE_PC(v,pid) hppa_target_write_pc (v,pid)
767extern void hppa_target_write_pc (CORE_ADDR, ptid_t);
768#endif
c906108c 769
60383d10
JB		 770#if !GDB_MULTI_ARCH
771#define TARGET_READ_FP() hppa_target_read_fp ()
772extern CORE_ADDR hppa_target_read_fp (void);
773#endif
c906108c
SS		 774
775/* For a number of horrible reasons we may have to adjust the location
776 of variables on the stack. Ugh. */
777#define HPREAD_ADJUST_STACK_ADDRESS(ADDR) hpread_adjust_stack_address(ADDR)
a14ed312 778extern int hpread_adjust_stack_address (CORE_ADDR);
c906108c 779
c2c6d25f
JM		 780/* Here's how to step off a permanent breakpoint. */
781#define SKIP_PERMANENT_BREAKPOINT (hppa_skip_permanent_breakpoint)
782extern void hppa_skip_permanent_breakpoint (void);
2df3850c
JM		 783
784/* On HP-UX, certain system routines (millicode) have names beginning
785 with $ or $$, e.g. $$dyncall, which handles inter-space procedure
786 calls on PA-RISC. Tell the expression parser to check for those
787 when parsing tokens that begin with "$". */
788#define SYMBOLS_CAN_START_WITH_DOLLAR (1)
GDB Binutils - Deliverables
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