1 /* Parameters for execution on any Hewlett-Packard PA-RISC machine.
2 Copyright 1986, 1987, 1989-1993, 1995, 1999, 2000 Free Software Foundation, Inc.
4 Contributed by the Center for Software Science at the
5 University of Utah (pa-gdb-bugs@cs.utah.edu).
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
24 /* Forward declarations of some types we use in prototypes */
27 struct frame_saved_regs
;
30 struct inferior_status
;
32 /* Target system byte order. */
34 #define TARGET_BYTE_ORDER BIG_ENDIAN
36 /* By default assume we don't have to worry about software floating point. */
41 /* Get at various relevent fields of an instruction word. */
45 #define MASK_14 0x3fff
46 #define MASK_21 0x1fffff
48 /* This macro gets bit fields using HP's numbering (MSB = 0) */
50 #define GET_FIELD(X, FROM, TO) \
51 ((X) >> (31 - (TO)) & ((1 << ((TO) - (FROM) + 1)) - 1))
54 /* Watch out for NaNs */
58 /* On the PA, any pass-by-value structure > 8 bytes is actually
59 passed via a pointer regardless of its type or the compiler
62 #define REG_STRUCT_HAS_ADDR(gcc_p,type) \
63 (TYPE_LENGTH (type) > 8)
65 /* Offset from address of function to start of its code.
66 Zero on most machines. */
68 #define FUNCTION_START_OFFSET 0
70 /* Advance PC across any function entry prologue instructions
71 to reach some "real" code. */
73 extern CORE_ADDR hppa_skip_prologue
PARAMS ((CORE_ADDR
));
74 #define SKIP_PROLOGUE(pc) (hppa_skip_prologue (pc))
76 /* If PC is in some function-call trampoline code, return the PC
77 where the function itself actually starts. If not, return NULL. */
79 #define SKIP_TRAMPOLINE_CODE(pc) skip_trampoline_code (pc, NULL)
80 extern CORE_ADDR skip_trampoline_code
PARAMS ((CORE_ADDR
, char *));
82 /* Return non-zero if we are in an appropriate trampoline. */
84 #define IN_SOLIB_CALL_TRAMPOLINE(pc, name) \
85 in_solib_call_trampoline (pc, name)
86 extern int in_solib_call_trampoline
PARAMS ((CORE_ADDR
, char *));
88 #define IN_SOLIB_RETURN_TRAMPOLINE(pc, name) \
89 in_solib_return_trampoline (pc, name)
90 extern int in_solib_return_trampoline
PARAMS ((CORE_ADDR
, char *));
92 /* Immediately after a function call, return the saved pc.
93 Can't go through the frames for this because on some machines
94 the new frame is not set up until the new function executes
97 #undef SAVED_PC_AFTER_CALL
98 #define SAVED_PC_AFTER_CALL(frame) saved_pc_after_call (frame)
99 extern CORE_ADDR saved_pc_after_call
PARAMS ((struct frame_info
*));
101 /* Stack grows upward */
102 #define INNER_THAN(lhs,rhs) ((lhs) > (rhs))
104 /* elz: adjust the quantity to the next highest value which is 64-bit aligned.
105 This is used in valops.c, when the sp is adjusted.
106 On hppa the sp must always be kept 64-bit aligned */
108 #define STACK_ALIGN(arg) ( ((arg)%8) ? (((arg)+7)&-8) : (arg))
109 #define NO_EXTRA_ALIGNMENT_NEEDED 1
111 /* Sequence of bytes for breakpoint instruction. */
113 #define BREAKPOINT {0x00, 0x01, 0x00, 0x04}
114 #define BREAKPOINT32 0x10004
116 /* Amount PC must be decremented by after a breakpoint.
117 This is often the number of bytes in BREAKPOINT
120 Not on the PA-RISC */
122 #define DECR_PC_AFTER_BREAK 0
124 /* Sometimes we may pluck out a minimal symbol that has a negative
127 An example of this occurs when an a.out is linked against a foo.sl.
128 The foo.sl defines a global bar(), and the a.out declares a signature
129 for bar(). However, the a.out doesn't directly call bar(), but passes
130 its address in another call.
132 If you have this scenario and attempt to "break bar" before running,
133 gdb will find a minimal symbol for bar() in the a.out. But that
134 symbol's address will be negative. What this appears to denote is
135 an index backwards from the base of the procedure linkage table (PLT)
136 into the data linkage table (DLT), the end of which is contiguous
137 with the start of the PLT. This is clearly not a valid address for
138 us to set a breakpoint on.
140 Note that one must be careful in how one checks for a negative address.
141 0xc0000000 is a legitimate address of something in a shared text
142 segment, for example. Since I don't know what the possible range
143 is of these "really, truly negative" addresses that come from the
144 minimal symbols, I'm resorting to the gross hack of checking the
145 top byte of the address for all 1's. Sigh.
147 #define PC_REQUIRES_RUN_BEFORE_USE(pc) \
148 (! target_has_stack && (pc & 0xFF000000))
150 /* return instruction is bv r0(rp) or bv,n r0(rp) */
152 #define ABOUT_TO_RETURN(pc) ((read_memory_integer (pc, 4) | 0x2) == 0xE840C002)
154 /* Say how long (ordinary) registers are. This is a piece of bogosity
155 used in push_word and a few other places; REGISTER_RAW_SIZE is the
156 real way to know how big a register is. */
158 #define REGISTER_SIZE 4
160 /* Number of machine registers */
164 /* Initializer for an array of names of registers.
165 There should be NUM_REGS strings in this initializer.
166 They are in rows of eight entries */
168 #define REGISTER_NAMES \
169 {"flags", "r1", "rp", "r3", "r4", "r5", "r6", "r7", \
170 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \
171 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \
172 "r24", "r25", "r26", "dp", "ret0", "ret1", "sp", "r31", \
173 "sar", "pcoqh", "pcsqh", "pcoqt", "pcsqt", "eiem", "iir", "isr", \
174 "ior", "ipsw", "goto", "sr4", "sr0", "sr1", "sr2", "sr3", \
175 "sr5", "sr6", "sr7", "cr0", "cr8", "cr9", "ccr", "cr12", \
176 "cr13", "cr24", "cr25", "cr26", "mpsfu_high","mpsfu_low","mpsfu_ovflo","pad",\
177 "fpsr", "fpe1", "fpe2", "fpe3", "fpe4", "fpe5", "fpe6", "fpe7", \
178 "fr4", "fr4R", "fr5", "fr5R", "fr6", "fr6R", "fr7", "fr7R", \
179 "fr8", "fr8R", "fr9", "fr9R", "fr10", "fr10R", "fr11", "fr11R", \
180 "fr12", "fr12R", "fr13", "fr13R", "fr14", "fr14R", "fr15", "fr15R", \
181 "fr16", "fr16R", "fr17", "fr17R", "fr18", "fr18R", "fr19", "fr19R", \
182 "fr20", "fr20R", "fr21", "fr21R", "fr22", "fr22R", "fr23", "fr23R", \
183 "fr24", "fr24R", "fr25", "fr25R", "fr26", "fr26R", "fr27", "fr27R", \
184 "fr28", "fr28R", "fr29", "fr29R", "fr30", "fr30R", "fr31", "fr31R"}
186 /* Register numbers of various important registers.
187 Note that some of these values are "real" register numbers,
188 and correspond to the general registers of the machine,
189 and some are "phony" register numbers which are too large
190 to be actual register numbers as far as the user is concerned
191 but do serve to get the desired values when passed to read_register. */
193 #define R0_REGNUM 0 /* Doesn't actually exist, used as base for
194 other r registers. */
195 #define FLAGS_REGNUM 0 /* Various status flags */
196 #define RP_REGNUM 2 /* return pointer */
197 #define FP_REGNUM 3 /* Contains address of executing stack */
199 #define SP_REGNUM 30 /* Contains address of top of stack */
200 #define SAR_REGNUM 32 /* Shift Amount Register */
201 #define IPSW_REGNUM 41 /* Interrupt Processor Status Word */
202 #define PCOQ_HEAD_REGNUM 33 /* instruction offset queue head */
203 #define PCSQ_HEAD_REGNUM 34 /* instruction space queue head */
204 #define PCOQ_TAIL_REGNUM 35 /* instruction offset queue tail */
205 #define PCSQ_TAIL_REGNUM 36 /* instruction space queue tail */
206 #define EIEM_REGNUM 37 /* External Interrupt Enable Mask */
207 #define IIR_REGNUM 38 /* Interrupt Instruction Register */
208 #define IOR_REGNUM 40 /* Interrupt Offset Register */
209 #define SR4_REGNUM 43 /* space register 4 */
210 #define RCR_REGNUM 51 /* Recover Counter (also known as cr0) */
211 #define CCR_REGNUM 54 /* Coprocessor Configuration Register */
212 #define TR0_REGNUM 57 /* Temporary Registers (cr24 -> cr31) */
213 #define CR27_REGNUM 60 /* Base register for thread-local storage, cr27 */
214 #define FP0_REGNUM 64 /* floating point reg. 0 (fspr) */
215 #define FP4_REGNUM 72
217 #define ARG0_REGNUM 26 /* The first argument of a callee. */
218 #define ARG1_REGNUM 25 /* The second argument of a callee. */
219 #define ARG2_REGNUM 24 /* The third argument of a callee. */
220 #define ARG3_REGNUM 23 /* The fourth argument of a callee. */
222 /* compatibility with the rest of gdb. */
223 #define PC_REGNUM PCOQ_HEAD_REGNUM
224 #define NPC_REGNUM PCOQ_TAIL_REGNUM
227 * Processor Status Word Masks
230 #define PSW_T 0x01000000 /* Taken Branch Trap Enable */
231 #define PSW_H 0x00800000 /* Higher-Privilege Transfer Trap Enable */
232 #define PSW_L 0x00400000 /* Lower-Privilege Transfer Trap Enable */
233 #define PSW_N 0x00200000 /* PC Queue Front Instruction Nullified */
234 #define PSW_X 0x00100000 /* Data Memory Break Disable */
235 #define PSW_B 0x00080000 /* Taken Branch in Previous Cycle */
236 #define PSW_C 0x00040000 /* Code Address Translation Enable */
237 #define PSW_V 0x00020000 /* Divide Step Correction */
238 #define PSW_M 0x00010000 /* High-Priority Machine Check Disable */
239 #define PSW_CB 0x0000ff00 /* Carry/Borrow Bits */
240 #define PSW_R 0x00000010 /* Recovery Counter Enable */
241 #define PSW_Q 0x00000008 /* Interruption State Collection Enable */
242 #define PSW_P 0x00000004 /* Protection ID Validation Enable */
243 #define PSW_D 0x00000002 /* Data Address Translation Enable */
244 #define PSW_I 0x00000001 /* External, Power Failure, Low-Priority */
245 /* Machine Check Interruption Enable */
247 /* When fetching register values from an inferior or a core file,
248 clean them up using this macro. BUF is a char pointer to
249 the raw value of the register in the registers[] array. */
251 #define CLEAN_UP_REGISTER_VALUE(regno, buf) \
253 if ((regno) == PCOQ_HEAD_REGNUM || (regno) == PCOQ_TAIL_REGNUM) \
254 (buf)[sizeof(CORE_ADDR) -1] &= ~0x3; \
257 /* Define DO_REGISTERS_INFO() to do machine-specific formatting
258 of register dumps. */
260 #define DO_REGISTERS_INFO(_regnum, fp) pa_do_registers_info (_regnum, fp)
261 extern void pa_do_registers_info
PARAMS ((int, int));
264 #define STRCAT_REGISTER(regnum, fpregs, stream, precision) pa_do_strcat_registers_info (regnum, fpregs, stream, precision)
265 extern void pa_do_strcat_registers_info (int, int, struct ui_file
*, enum precision_type
);
268 /* PA specific macro to see if the current instruction is nullified. */
269 #ifndef INSTRUCTION_NULLIFIED
270 #define INSTRUCTION_NULLIFIED \
271 (((int)read_register (IPSW_REGNUM) & 0x00200000) && \
272 !((int)read_register (FLAGS_REGNUM) & 0x2))
275 /* Number of bytes of storage in the actual machine representation
276 for register N. On the PA-RISC, all regs are 4 bytes, including
277 the FP registers (they're accessed as two 4 byte halves). */
279 #define REGISTER_RAW_SIZE(N) 4
281 /* Total amount of space needed to store our copies of the machine's
282 register state, the array `registers'. */
283 #define REGISTER_BYTES (NUM_REGS * 4)
285 /* Index within `registers' of the first byte of the space for
288 #define REGISTER_BYTE(N) (N) * 4
290 /* Number of bytes of storage in the program's representation
293 #define REGISTER_VIRTUAL_SIZE(N) REGISTER_RAW_SIZE(N)
295 /* Largest value REGISTER_RAW_SIZE can have. */
297 #define MAX_REGISTER_RAW_SIZE 4
299 /* Largest value REGISTER_VIRTUAL_SIZE can have. */
301 #define MAX_REGISTER_VIRTUAL_SIZE 8
303 /* Return the GDB type object for the "standard" data type
304 of data in register N. */
306 #define REGISTER_VIRTUAL_TYPE(N) \
307 ((N) < FP4_REGNUM ? builtin_type_int : builtin_type_float)
309 /* Store the address of the place in which to copy the structure the
310 subroutine will return. This is called from call_function. */
312 #define STORE_STRUCT_RETURN(ADDR, SP) {write_register (28, (ADDR)); }
314 /* Extract from an array REGBUF containing the (raw) register state
315 a function return value of type TYPE, and copy that, in virtual format,
318 elz: changed what to return when length is > 4: the stored result is
319 in register 28 and in register 29, with the lower order word being in reg 29,
320 so we must start reading it from somehere in the middle of reg28
322 FIXME: Not sure what to do for soft float here. */
324 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
326 if (TYPE_CODE (TYPE) == TYPE_CODE_FLT && !SOFT_FLOAT) \
328 ((char *)(REGBUF)) + REGISTER_BYTE (FP4_REGNUM), \
329 TYPE_LENGTH (TYPE)); \
332 (char *)(REGBUF) + REGISTER_BYTE (28) + \
333 (TYPE_LENGTH (TYPE) > 4 ? (8 - TYPE_LENGTH (TYPE)) : (4 - TYPE_LENGTH (TYPE))), \
334 TYPE_LENGTH (TYPE)); \
338 /* elz: decide whether the function returning a value of type type
339 will put it on the stack or in the registers.
340 The pa calling convention says that:
341 register 28 (called ret0 by gdb) contains any ASCII char,
342 and any non_floating point value up to 32-bits.
343 reg 28 and 29 contain non-floating point up tp 64 bits and larger
344 than 32 bits. (higer order word in reg 28).
345 fr4: floating point up to 64 bits
346 sr1: space identifier (32-bit)
347 stack: any lager than 64-bit, with the address in r28
349 extern use_struct_convention_fn hppa_use_struct_convention
;
350 #define USE_STRUCT_CONVENTION(gcc_p,type) hppa_use_struct_convention (gcc_p,type)
352 /* Write into appropriate registers a function return value
353 of type TYPE, given in virtual format.
355 For software floating point the return value goes into the integer
356 registers. But we don't have any flag to key this on, so we always
357 store the value into the integer registers, and if it's a float value,
358 then we put it in the float registers too. */
360 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
361 write_register_bytes (REGISTER_BYTE (28),(VALBUF), TYPE_LENGTH (TYPE)) ; \
363 write_register_bytes ((TYPE_CODE(TYPE) == TYPE_CODE_FLT \
364 ? REGISTER_BYTE (FP4_REGNUM) \
365 : REGISTER_BYTE (28)), \
366 (VALBUF), TYPE_LENGTH (TYPE))
368 /* Extract from an array REGBUF containing the (raw) register state
369 the address in which a function should return its structure value,
370 as a CORE_ADDR (or an expression that can be used as one). */
372 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
373 (*(int *)((REGBUF) + REGISTER_BYTE (28)))
375 /* elz: Return a large value, which is stored on the stack at addr.
376 This is defined only for the hppa, at this moment.
377 The above macro EXTRACT_STRUCT_VALUE_ADDRESS is not called anymore,
378 because it assumes that on exit from a called function which returns
379 a large structure on the stack, the address of the ret structure is
380 still in register 28. Unfortunately this register is usually overwritten
381 by the called function itself, on hppa. This is specified in the calling
382 convention doc. As far as I know, the only way to get the return value
383 is to have the caller tell us where it told the callee to put it, rather
384 than have the callee tell us.
386 #define VALUE_RETURNED_FROM_STACK(valtype,addr) \
387 hppa_value_returned_from_stack (valtype, addr)
390 * This macro defines the register numbers (from REGISTER_NAMES) that
391 * are effectively unavailable to the user through ptrace(). It allows
392 * us to include the whole register set in REGISTER_NAMES (inorder to
393 * better support remote debugging). If it is used in
394 * fetch/store_inferior_registers() gdb will not complain about I/O errors
395 * on fetching these registers. If all registers in REGISTER_NAMES
396 * are available, then return false (0).
399 #define CANNOT_STORE_REGISTER(regno) \
401 ((regno) == PCSQ_HEAD_REGNUM) || \
402 ((regno) >= PCSQ_TAIL_REGNUM && (regno) < IPSW_REGNUM) || \
403 ((regno) > IPSW_REGNUM && (regno) < FP4_REGNUM)
405 #define INIT_EXTRA_FRAME_INFO(fromleaf, frame) init_extra_frame_info (fromleaf, frame)
406 extern void init_extra_frame_info
PARAMS ((int, struct frame_info
*));
408 /* Describe the pointer in each stack frame to the previous stack frame
411 /* FRAME_CHAIN takes a frame's nominal address
412 and produces the frame's chain-pointer.
414 FRAME_CHAIN_COMBINE takes the chain pointer and the frame's nominal address
415 and produces the nominal address of the caller frame.
417 However, if FRAME_CHAIN_VALID returns zero,
418 it means the given frame is the outermost one and has no caller.
419 In that case, FRAME_CHAIN_COMBINE is not used. */
421 /* In the case of the PA-RISC, the frame's nominal address
422 is the address of a 4-byte word containing the calling frame's
423 address (previous FP). */
425 #define FRAME_CHAIN(thisframe) frame_chain (thisframe)
426 extern CORE_ADDR frame_chain
PARAMS ((struct frame_info
*));
428 extern int hppa_frame_chain_valid
PARAMS ((CORE_ADDR
, struct frame_info
*));
429 #define FRAME_CHAIN_VALID(chain, thisframe) hppa_frame_chain_valid (chain, thisframe)
431 #define FRAME_CHAIN_COMBINE(chain, thisframe) (chain)
433 /* Define other aspects of the stack frame. */
435 /* A macro that tells us whether the function invocation represented
436 by FI does not have a frame on the stack associated with it. If it
437 does not, FRAMELESS is set to 1, else 0. */
438 #define FRAMELESS_FUNCTION_INVOCATION(FI) \
439 (frameless_function_invocation (FI))
440 extern int frameless_function_invocation
PARAMS ((struct frame_info
*));
442 extern CORE_ADDR hppa_frame_saved_pc
PARAMS ((struct frame_info
* frame
));
443 #define FRAME_SAVED_PC(FRAME) hppa_frame_saved_pc (FRAME)
445 #define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)
447 #define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
448 /* Set VAL to the number of args passed to frame described by FI.
449 Can set VAL to -1, meaning no way to tell. */
451 /* We can't tell how many args there are
452 now that the C compiler delays popping them. */
453 #define FRAME_NUM_ARGS(fi) (-1)
455 /* Return number of bytes at start of arglist that are not really args. */
457 #define FRAME_ARGS_SKIP 0
459 #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
460 hppa_frame_find_saved_regs (frame_info, &frame_saved_regs)
462 hppa_frame_find_saved_regs
PARAMS ((struct frame_info
*,
463 struct frame_saved_regs
*));
466 /* Things needed for making the inferior call functions. */
468 /* Push an empty stack frame, to record the current PC, etc. */
470 #define PUSH_DUMMY_FRAME push_dummy_frame (inf_status)
471 extern void push_dummy_frame
PARAMS ((struct inferior_status
*));
473 /* Discard from the stack the innermost frame,
474 restoring all saved registers. */
475 #define POP_FRAME hppa_pop_frame ()
476 extern void hppa_pop_frame
PARAMS ((void));
478 #define INSTRUCTION_SIZE 4
482 /* Non-level zero PA's have space registers (but they don't always have
483 floating-point, do they???? */
485 /* This sequence of words is the instructions
487 ; Call stack frame has already been built by gdb. Since we could be calling
488 ; a varargs function, and we do not have the benefit of a stub to put things in
489 ; the right place, we load the first 4 word of arguments into both the general
500 fldds -12(0, r1), fr7
501 ldil 0, r22 ; FUNC_LDIL_OFFSET must point here
502 ldo 0(r22), r22 ; FUNC_LDO_OFFSET must point here
504 ldil 0, r1 ; SR4EXPORT_LDIL_OFFSET must point here
505 ldo 0(r1), r1 ; SR4EXPORT_LDO_OFFSET must point here
507 combt,=,n r4, r20, text_space ; If target is in data space, do a
508 ble 0(sr5, r22) ; "normal" procedure call
513 text_space ; Otherwise, go through _sr4export,
514 ble (sr4, r1) ; which will return back here.
519 nop ; To avoid kernel bugs
520 nop ; and keep the dummy 8 byte aligned
522 The dummy decides if the target is in text space or data space. If
523 it's in data space, there's no problem because the target can
524 return back to the dummy. However, if the target is in text space,
525 the dummy calls the secret, undocumented routine _sr4export, which
526 calls a function in text space and can return to any space. Instead
527 of including fake instructions to represent saved registers, we
528 know that the frame is associated with the call dummy and treat it
531 The trailing NOPs are needed to avoid a bug in HPUX, BSD and OSF1
532 kernels. If the memory at the location pointed to by the PC is
533 0xffffffff then a ptrace step call will fail (even if the instruction
536 The code to pop a dummy frame single steps three instructions
537 starting with the last mtsp. This includes the nullified "instruction"
538 following the ble (which is uninitialized junk). If the
539 "instruction" following the last BLE is 0xffffffff, then the ptrace
540 will fail and the dummy frame is not correctly popped.
542 By placing a NOP in the delay slot of the BLE instruction we can be
543 sure that we never try to execute a 0xffffffff instruction and
544 avoid the kernel bug. The second NOP is needed to keep the call
545 dummy 8 byte aligned. */
547 /* Define offsets into the call dummy for the target function address */
548 #define FUNC_LDIL_OFFSET (INSTRUCTION_SIZE * 9)
549 #define FUNC_LDO_OFFSET (INSTRUCTION_SIZE * 10)
551 /* Define offsets into the call dummy for the _sr4export address */
552 #define SR4EXPORT_LDIL_OFFSET (INSTRUCTION_SIZE * 12)
553 #define SR4EXPORT_LDO_OFFSET (INSTRUCTION_SIZE * 13)
555 #define CALL_DUMMY {0x4BDA3FB9, 0x4BD93FB1, 0x4BD83FA9, 0x4BD73FA1,\
556 0x37C13FB9, 0x24201004, 0x2C391005, 0x24311006,\
557 0x2C291007, 0x22C00000, 0x36D60000, 0x02C010A4,\
558 0x20200000, 0x34210000, 0x002010b4, 0x82842022,\
559 0xe6c06000, 0x081f0242, 0x00010004, 0x00151820,\
560 0xe6c00002, 0xe4202000, 0x6bdf3fd1, 0x00010004,\
561 0x00151820, 0xe6c00002, 0x08000240, 0x08000240}
563 #define CALL_DUMMY_LENGTH (INSTRUCTION_SIZE * 28)
564 #define REG_PARM_STACK_SPACE 16
566 #else /* defined PA_LEVEL_0 */
568 /* This is the call dummy for a level 0 PA. Level 0's don't have space
569 registers (or floating point??), so we skip all that inter-space call stuff,
570 and avoid touching the fp regs.
578 ldil 0, %r31 ; FUNC_LDIL_OFFSET must point here
579 ldo 0(%r31), %r31 ; FUNC_LDO_OFFSET must point here
583 nop ; restore_pc_queue expects these
584 bv,n 0(%r22) ; instructions to be here...
588 /* Define offsets into the call dummy for the target function address */
589 #define FUNC_LDIL_OFFSET (INSTRUCTION_SIZE * 4)
590 #define FUNC_LDO_OFFSET (INSTRUCTION_SIZE * 5)
592 #define CALL_DUMMY {0x4bda3fb9, 0x4bd93fb1, 0x4bd83fa9, 0x4bd73fa1,\
593 0x23e00000, 0x37ff0000, 0xe7e00000, 0x081f0242,\
594 0x00010004, 0x08000240, 0xeac0c002, 0x08000240}
596 #define CALL_DUMMY_LENGTH (INSTRUCTION_SIZE * 12)
600 #define CALL_DUMMY_START_OFFSET 0
602 /* If we've reached a trap instruction within the call dummy, then
603 we'll consider that to mean that we've reached the call dummy's
604 end after its successful completion. */
605 #define CALL_DUMMY_HAS_COMPLETED(pc, sp, frame_address) \
606 (PC_IN_CALL_DUMMY((pc), (sp), (frame_address)) && \
607 (read_memory_integer((pc), 4) == BREAKPOINT32))
610 * Insert the specified number of args and function address
611 * into a call sequence of the above form stored at DUMMYNAME.
613 * On the hppa we need to call the stack dummy through $$dyncall.
614 * Therefore our version of FIX_CALL_DUMMY takes an extra argument,
615 * real_pc, which is the location where gdb should start up the
616 * inferior to do the function call.
619 #define FIX_CALL_DUMMY hppa_fix_call_dummy
622 hppa_fix_call_dummy
PARAMS ((char *, CORE_ADDR
, CORE_ADDR
, int,
623 struct value
**, struct type
*, int));
625 #define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
626 (hppa_push_arguments((nargs), (args), (sp), (struct_return), (struct_addr)))
628 hppa_push_arguments
PARAMS ((int, struct value
**, CORE_ADDR
, int,
631 /* The low two bits of the PC on the PA contain the privilege level. Some
632 genius implementing a (non-GCC) compiler apparently decided this means
633 that "addresses" in a text section therefore include a privilege level,
634 and thus symbol tables should contain these bits. This seems like a
635 bonehead thing to do--anyway, it seems to work for our purposes to just
636 ignore those bits. */
637 #define SMASH_TEXT_ADDRESS(addr) ((addr) &= ~0x3)
639 #define GDB_TARGET_IS_HPPA
641 #define BELIEVE_PCC_PROMOTION 1
644 * Unwind table and descriptor.
647 struct unwind_table_entry
649 CORE_ADDR region_start
;
650 CORE_ADDR region_end
;
652 unsigned int Cannot_unwind
:1; /* 0 */
653 unsigned int Millicode
:1; /* 1 */
654 unsigned int Millicode_save_sr0
:1; /* 2 */
655 unsigned int Region_description
:2; /* 3..4 */
656 unsigned int reserved1
:1; /* 5 */
657 unsigned int Entry_SR
:1; /* 6 */
658 unsigned int Entry_FR
:4; /* number saved *//* 7..10 */
659 unsigned int Entry_GR
:5; /* number saved *//* 11..15 */
660 unsigned int Args_stored
:1; /* 16 */
661 unsigned int Variable_Frame
:1; /* 17 */
662 unsigned int Separate_Package_Body
:1; /* 18 */
663 unsigned int Frame_Extension_Millicode
:1; /* 19 */
664 unsigned int Stack_Overflow_Check
:1; /* 20 */
665 unsigned int Two_Instruction_SP_Increment
:1; /* 21 */
666 unsigned int Ada_Region
:1; /* 22 */
667 unsigned int cxx_info
:1; /* 23 */
668 unsigned int cxx_try_catch
:1; /* 24 */
669 unsigned int sched_entry_seq
:1; /* 25 */
670 unsigned int reserved2
:1; /* 26 */
671 unsigned int Save_SP
:1; /* 27 */
672 unsigned int Save_RP
:1; /* 28 */
673 unsigned int Save_MRP_in_frame
:1; /* 29 */
674 unsigned int extn_ptr_defined
:1; /* 30 */
675 unsigned int Cleanup_defined
:1; /* 31 */
677 unsigned int MPE_XL_interrupt_marker
:1; /* 0 */
678 unsigned int HP_UX_interrupt_marker
:1; /* 1 */
679 unsigned int Large_frame
:1; /* 2 */
680 unsigned int Pseudo_SP_Set
:1; /* 3 */
681 unsigned int reserved4
:1; /* 4 */
682 unsigned int Total_frame_size
:27; /* 5..31 */
684 /* This is *NOT* part of an actual unwind_descriptor in an object
685 file. It is *ONLY* part of the "internalized" descriptors that
686 we create from those in a file.
690 unsigned int stub_type
:4; /* 0..3 */
691 unsigned int padding
:28; /* 4..31 */
696 /* HP linkers also generate unwinds for various linker-generated stubs.
697 GDB reads in the stubs from the $UNWIND_END$ subspace, then
698 "converts" them into normal unwind entries using some of the reserved
699 fields to store the stub type. */
701 struct stub_unwind_entry
703 /* The offset within the executable for the associated stub. */
704 unsigned stub_offset
;
706 /* The type of stub this unwind entry describes. */
709 /* Unknown. Not needed by GDB at this time. */
712 /* Length (in instructions) of the associated stub. */
716 /* Sizes (in bytes) of the native unwind entries. */
717 #define UNWIND_ENTRY_SIZE 16
718 #define STUB_UNWIND_ENTRY_SIZE 8
720 /* The gaps represent linker stubs used in MPE and space for future
722 enum unwind_stub_types
725 PARAMETER_RELOCATION
= 2,
731 /* We use the objfile->obj_private pointer for two things:
733 * 1. An unwind table;
735 * 2. A pointer to any associated shared library object.
737 * #defines are used to help refer to these objects.
740 /* Info about the unwind table associated with an object file.
742 * This is hung off of the "objfile->obj_private" pointer, and
743 * is allocated in the objfile's psymbol obstack. This allows
744 * us to have unique unwind info for each executable and shared
745 * library that we are debugging.
747 struct obj_unwind_info
749 struct unwind_table_entry
*table
; /* Pointer to unwind info */
750 struct unwind_table_entry
*cache
; /* Pointer to last entry we found */
751 int last
; /* Index of last entry */
754 typedef struct obj_private_struct
756 struct obj_unwind_info
*unwind_info
; /* a pointer */
757 struct so_list
*so_info
; /* a pointer */
763 extern void target_write_pc
764 PARAMS ((CORE_ADDR
, int))
765 extern CORE_ADDR target_read_pc
PARAMS ((int));
766 extern CORE_ADDR skip_trampoline_code
PARAMS ((CORE_ADDR
, char *));
769 #define TARGET_READ_PC(pid) target_read_pc (pid)
770 extern CORE_ADDR target_read_pc
PARAMS ((int));
772 #define TARGET_WRITE_PC(v,pid) target_write_pc (v,pid)
773 extern void target_write_pc
PARAMS ((CORE_ADDR
, int));
775 #define TARGET_READ_FP() target_read_fp (inferior_pid)
776 extern CORE_ADDR target_read_fp
PARAMS ((int));
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)
782 extern int hpread_adjust_stack_address
PARAMS ((CORE_ADDR
));
784 /* If the current gcc for for this target does not produce correct debugging
785 information for float parameters, both prototyped and unprototyped, then
786 define this macro. This forces gdb to always assume that floats are
787 passed as doubles and then converted in the callee.
789 For the pa, it appears that the debug info marks the parameters as
790 floats regardless of whether the function is prototyped, but the actual
791 values are passed as doubles for the non-prototyped case and floats for
792 the prototyped case. Thus we choose to make the non-prototyped case work
793 for C and break the prototyped case, since the non-prototyped case is
794 probably much more common. (FIXME). */
796 #define COERCE_FLOAT_TO_DOUBLE (current_language -> la_language == language_c)
798 /* Here's how to step off a permanent breakpoint. */
799 #define SKIP_PERMANENT_BREAKPOINT (hppa_skip_permanent_breakpoint)
800 extern void hppa_skip_permanent_breakpoint (void);
802 /* On HP-UX, certain system routines (millicode) have names beginning
803 with $ or $$, e.g. $$dyncall, which handles inter-space procedure
804 calls on PA-RISC. Tell the expression parser to check for those
805 when parsing tokens that begin with "$". */
806 #define SYMBOLS_CAN_START_WITH_DOLLAR (1)