1 /* Parameters for execution on a Hewlett-Packard PA-RISC machine.
2 Copyright 1986, 1987, 1989, 1990, 1991, 1992 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
23 /* Target system byte order. */
25 #define TARGET_BYTE_ORDER BIG_ENDIAN
27 /* Get at various relevent fields of an instruction word. */
31 #define MASK_14 0x3fff
32 #define MASK_21 0x1fffff
34 /* This macro gets bit fields using HP's numbering (MSB = 0) */
36 #define GET_FIELD(X, FROM, TO) \
37 ((X) >> 31 - (TO) & (1 << ((TO) - (FROM) + 1)) - 1)
39 /* Watch out for NaNs */
45 #define ARGS_GROW_DOWN
47 /* Define this if the C compiler puts an underscore at the front
48 of external names before giving them to the linker. */
50 /* #define NAMES_HAVE_UNDERSCORE */
52 /* Offset from address of function to start of its code.
53 Zero on most machines. */
55 #define FUNCTION_START_OFFSET 0
57 /* Advance PC across any function entry prologue instructions
58 to reach some "real" code. */
60 /* skip (stw rp, -20(0,sp)); copy 4,1; copy sp, 4; stwm 1,framesize(sp)
61 for gcc, or (stw rp, -20(0,sp); stwm 1, framesize(sp) for hcc */
63 #define SKIP_PROLOGUE(pc) \
64 { if (read_memory_integer ((pc), 4) == 0x6BC23FD9) \
65 { if (read_memory_integer ((pc) + 4, 4) == 0x8040241) \
67 else if ((read_memory_integer (pc + 4, 4) & ~MASK_14) == 0x68810000) \
69 else if (read_memory_integer ((pc), 4) == 0x8040241) \
71 else if ((read_memory_integer (pc, 4) & ~MASK_14) == 0x68810000) \
74 /* Immediately after a function call, return the saved pc.
75 Can't go through the frames for this because on some machines
76 the new frame is not set up until the new function executes
79 #define SAVED_PC_AFTER_CALL(frame) (read_register (RP_REGNUM) & ~3)
81 /* Address of end of stack space. Who knows. */
83 #define STACK_END_ADDR 0x80000000
85 /* Stack grows upward */
90 /* Sequence of bytes for breakpoint instruction. */
92 /*#define BREAKPOINT {0x00, 0x00, 0x00, 0x00}*/
93 #ifdef KERNELDEBUG /* XXX */
94 #define BREAKPOINT {0x00, 0x00, 0xa0, 0x00}
96 #define BREAKPOINT {0x00, 0x01, 0x00, 0x04}
99 /* Amount PC must be decremented by after a breakpoint.
100 This is often the number of bytes in BREAKPOINT
103 Not on the PA-RISC */
105 #define DECR_PC_AFTER_BREAK 0
107 /* return instruction is bv r0(rp) */
109 #define ABOUT_TO_RETURN(pc) (read_memory_integer (pc, 4) == 0xE840C000)
111 /* Return 1 if P points to an invalid floating point value. */
113 #define INVALID_FLOAT(p, len) 0 /* Just a first guess; not checked */
115 /* Largest integer type */
118 /* Name of the builtin type for the LONGEST type above. */
119 #define BUILTIN_TYPE_LONGEST builtin_type_long
121 /* Say how long (ordinary) registers are. */
123 #define REGISTER_TYPE long
125 /* Number of machine registers */
129 /* Initializer for an array of names of registers.
130 There should be NUM_REGS strings in this initializer. */
132 #define REGISTER_NAMES \
133 {"flags", "r1", "rp", "r3", "r4", "r5", "r6", "r7", "r8", "r9", \
134 "r10", "r11", "r12", "r13", "r14", "r15", "r16", "r17", "r18", "r19", \
135 "r20", "r21", "r22", "arg3", "arg2", "arg1", "arg0", "dp", "ret0", "ret1", \
136 "sp", "r31", "sar", "pcoqh", "pcsqh", "pcoqt", "pcsqt", \
137 "eiem", "iir", "isr", "ior", "ipsw", "goto", "sr4", "sr0", "sr1", "sr2", \
138 "sr3", "sr5", "sr6", "sr7", "cr0", "cr8", "cr9", "ccr", "cr12", "cr13", \
139 "cr24", "cr25", "cr26", "mpsfu_high", "mpsfu_low", "mpsfu_ovflo", "pad", \
140 "fpsr", "fpe1", "fpe2", "fpe3", "fpe4", "fpe5", "fpe6", "fpe7", \
141 "fp4", "fp5", "fp6", "fp7", "fp8", \
142 "fp9", "fp10", "fp11", "fp12", "fp13", "fp14", "fp15", \
143 "fp16", "fp17", "fp18", "fp19", "fp20", "fp21", "fp22", "fp23", \
144 "fp24", "fp25", "fp26", "fp27", "fp28", "fp29", "fp30", "fp31"}
146 /* Register numbers of various important registers.
147 Note that some of these values are "real" register numbers,
148 and correspond to the general registers of the machine,
149 and some are "phony" register numbers which are too large
150 to be actual register numbers as far as the user is concerned
151 but do serve to get the desired values when passed to read_register. */
153 #define RP_REGNUM 2 /* return pointer */
154 #define FP_REGNUM 4 /* Contains address of executing stack */
156 #define SP_REGNUM 30 /* Contains address of top of stack */
157 #define SAR_REGNUM 32 /* shift amount register */
158 #define IPSW_REGNUM 41 /* processor status word. ? */
159 #define PCOQ_HEAD_REGNUM 33 /* instruction offset queue head */
160 #define PCSQ_HEAD_REGNUM 34 /* instruction space queue head */
161 #define PCOQ_TAIL_REGNUM 35 /* instruction offset queue tail */
162 #define PCSQ_TAIL_REGNUM 36 /* instruction space queue tail */
163 #define FP0_REGNUM 64 /* floating point reg. 0 */
164 #define FP4_REGNUM 72
166 /* compatibility with the rest of gdb. */
167 #define PC_REGNUM PCOQ_HEAD_REGNUM
168 #define NPC_REGNUM PCOQ_TAIL_REGNUM
170 /* When fetching register values from an inferior or a core file,
171 clean them up using this macro. BUF is a char pointer to
172 the raw value of the register in the registers[] array. */
174 #define CLEAN_UP_REGISTER_VALUE(regno, buf) \
176 if ((regno) == PCOQ_HEAD_REGNUM || (regno) == PCOQ_TAIL_REGNUM) \
180 /* Define DO_REGISTERS_INFO() to do machine-specific formatting
181 of register dumps. */
183 #define DO_REGISTERS_INFO(_regnum, fp) pa_do_registers_info (_regnum, fp)
185 /* PA specific macro to see if the current instruction is nullified. */
186 #define INSTRUCTION_NULLIFIED ((int)read_register (IPSW_REGNUM) & 0x00200000)
188 /* Total amount of space needed to store our copies of the machine's
189 register state, the array `registers'. */
190 #define REGISTER_BYTES (32 * 4 + 11 * 4 + 8 * 4 + 12 * 4 + 4 + 32 * 8)
192 /* Index within `registers' of the first byte of the space for
195 #define REGISTER_BYTE(N) \
196 ((N) >= FP4_REGNUM ? ((N) - FP4_REGNUM) * 8 + 288 : (N) * 4)
198 /* Number of bytes of storage in the actual machine representation
199 for register N. On the PA-RISC, all regs are 4 bytes
200 except the floating point regs which are 8 bytes. */
202 #define REGISTER_RAW_SIZE(N) ((N) < FP4_REGNUM ? 4 : 8)
204 /* Number of bytes of storage in the program's representation
207 #define REGISTER_VIRTUAL_SIZE(N) REGISTER_RAW_SIZE(N)
209 /* Largest value REGISTER_RAW_SIZE can have. */
211 #define MAX_REGISTER_RAW_SIZE 8
213 /* Largest value REGISTER_VIRTUAL_SIZE can have. */
215 #define MAX_REGISTER_VIRTUAL_SIZE 8
217 /* Nonzero if register N requires conversion
218 from raw format to virtual format. */
220 #define REGISTER_CONVERTIBLE(N) 0
222 /* Convert data from raw format for register REGNUM
223 to virtual format for register REGNUM. */
225 #define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO) \
226 { bcopy ((FROM), (TO), (REGNUM) < FP4_REGNUM ? 4 : 8); }
228 /* Convert data from virtual format for register REGNUM
229 to raw format for register REGNUM. */
231 #define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) \
232 { bcopy ((FROM), (TO), (REGNUM) < FP4_REGNUM ? 4 : 8); }
234 /* Return the GDB type object for the "standard" data type
235 of data in register N. */
237 #define REGISTER_VIRTUAL_TYPE(N) \
238 ((N) < FP4_REGNUM ? builtin_type_int : builtin_type_double)
240 /* Store the address of the place in which to copy the structure the
241 subroutine will return. This is called from call_function. */
243 #define STORE_STRUCT_RETURN(ADDR, SP) {write_register (28, (ADDR)); }
245 /* Extract from an array REGBUF containing the (raw) register state
246 a function return value of type TYPE, and copy that, in virtual format,
249 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
250 bcopy ((REGBUF) + REGISTER_BYTE(TYPE_LENGTH(TYPE) > 4 ? \
251 FP4_REGNUM :28), VALBUF, TYPE_LENGTH (TYPE))
253 /* Write into appropriate registers a function return value
254 of type TYPE, given in virtual format. */
256 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
257 write_register_bytes (TYPE_LENGTH(TYPE) > 4 ? FP4_REGNUM :28, \
258 VALBUF, TYPE_LENGTH (TYPE))
260 /* Extract from an array REGBUF containing the (raw) register state
261 the address in which a function should return its structure value,
262 as a CORE_ADDR (or an expression that can be used as one). */
264 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(int *)((REGBUF) + 28))
266 /* This is a piece of magic that is given a register number REGNO
267 and as BLOCKEND the address in the system of the end of the user structure
268 and stores in ADDR the address in the kernel or core dump
272 /* Describe the pointer in each stack frame to the previous stack frame
275 /* FRAME_CHAIN takes a frame's nominal address
276 and produces the frame's chain-pointer.
278 FRAME_CHAIN_COMBINE takes the chain pointer and the frame's nominal address
279 and produces the nominal address of the caller frame.
281 However, if FRAME_CHAIN_VALID returns zero,
282 it means the given frame is the outermost one and has no caller.
283 In that case, FRAME_CHAIN_COMBINE is not used. */
285 /* In the case of the PA-RISC, the frame's nominal address
286 is the address of a 4-byte word containing the calling frame's
287 address (previous FP). */
289 #define FRAME_CHAIN(thisframe) \
290 (!inside_entry_file ((thisframe)->pc) ? \
291 read_memory_integer ((thisframe)->frame, 4) :\
294 #define FRAME_CHAIN_VALID(chain, thisframe) \
295 frame_chain_valid (chain, thisframe)
297 #define FRAME_CHAIN_COMBINE(chain, thisframe) (chain)
299 /* Define other aspects of the stack frame. */
301 /* A macro that tells us whether the function invocation represented
302 by FI does not have a frame on the stack associated with it. If it
303 does not, FRAMELESS is set to 1, else 0. */
304 #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
305 (FRAMELESS) = frameless_look_for_prologue(FI)
307 #define FRAME_SAVED_PC(FRAME) frame_saved_pc (FRAME)
309 #define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)
311 #define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
312 /* Set VAL to the number of args passed to frame described by FI.
313 Can set VAL to -1, meaning no way to tell. */
315 /* We can't tell how many args there are
316 now that the C compiler delays popping them. */
317 #define FRAME_NUM_ARGS(val,fi) (val = -1)
319 /* Return number of bytes at start of arglist that are not really args. */
321 #define FRAME_ARGS_SKIP 0
323 /* Put here the code to store, into a struct frame_saved_regs,
324 the addresses of the saved registers of frame described by FRAME_INFO.
325 This includes special registers such as pc and fp saved in special
326 ways in the stack frame. sp is even more special:
327 the address we return for it IS the sp for the next frame. */
329 /* Deal with dummy functions later. */
331 #define STW_P(INSN) (((INSN) & 0xfc000000) == 0x68000000)
332 #define ADDIL_P(INSN) (((INSN) & 0xfc000000) == 0x28000000)
333 #define LDO_P(INSN) (((INSN) & 0xfc00c000) == 0x34000000)
336 #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
337 { register int regnum; \
338 register CORE_ADDR next_addr; \
339 register CORE_ADDR pc; \
340 unsigned this_insn; \
343 bzero (&frame_saved_regs, sizeof frame_saved_regs); \
344 if ((frame_info)->pc <= ((frame_info)->frame - CALL_DUMMY_LENGTH - \
345 FP_REGNUM * 4 - 16 * 8) \
346 && (frame_info)->pc > (frame_info)->frame) \
347 find_dummy_frame_regs ((frame_info), &(frame_saved_regs)); \
349 { pc = get_pc_function_start ((frame_info)->pc); \
350 if (read_memory_integer (pc, 4) == 0x6BC23FD9) \
351 { (frame_saved_regs).regs[RP_REGNUM] = (frame_info)->frame - 20;\
354 if (read_memory_integer (pc, 4) != 0x8040241) goto lose; \
355 pc += 8; /* skip "copy 4,1; copy 30, 4" */ \
356 /* skip either "stw 1,0(4);addil L'fsize,30;ldo R'fsize(1),30" \
357 or "stwm 1,fsize(30)" */ \
358 if ((read_memory_integer (pc, 4) & ~MASK_14) == 0x68810000) \
363 { this_insn = read_memory_integer(pc, 4); \
364 if (STW_P (this_insn)) /* stw */ \
365 { regnum = GET_FIELD (this_insn, 11, 15); \
366 if (!regnum) goto lose; \
367 (frame_saved_regs).regs[regnum] = (frame_info)->frame + \
368 extract_14 (this_insn); \
371 else if (ADDIL_P (this_insn)) /* addil */ \
373 next_insn = read_memory_integer(pc + 4, 4); \
374 if (STW_P (next_insn)) /* stw */ \
375 { regnum = GET_FIELD (this_insn, 6, 10); \
376 if (!regnum) goto lose; \
377 (frame_saved_regs).regs[regnum] = (frame_info)->frame +\
378 (extract_21 (this_insn) << 11) + extract_14 (next_insn);\
389 this_insn = read_memory_integer (pc, 4); \
390 if (LDO_P (this_insn)) \
391 { next_addr = (frame_info)->frame + extract_14 (this_insn); \
394 else if (ADDIL_P (this_insn)) \
395 { next_addr = (frame_info)->frame + (extract_21 (this_insn) << 11)\
396 + extract_14 (read_memory_integer (pc + 4, 4)); \
400 { this_insn = read_memory_integer (pc, 4); \
401 if ((this_insn & 0xfc001fe0) == 0x2c001220) /* fstds,ma */ \
402 { regnum = GET_FIELD (this_insn, 27, 31); \
403 (frame_saved_regs).regs[regnum + FP0_REGNUM] = next_addr; \
410 (frame_saved_regs).regs[FP_REGNUM] = (frame_info)->frame; \
411 (frame_saved_regs).regs[SP_REGNUM] = (frame_info)->frame -4; \
414 /* Things needed for making the inferior call functions. */
416 /* Push an empty stack frame, to record the current PC, etc. */
418 #define PUSH_DUMMY_FRAME \
419 { register CORE_ADDR sp = read_register (SP_REGNUM); \
420 register int regnum; \
422 char freg_buffer[8]; \
423 /* Space for "arguments"; the RP goes in here. */ \
425 int_buffer = read_register (RP_REGNUM) | 0x3; \
426 write_memory (sp - 20, (char *)&int_buffer, 4); \
427 int_buffer = read_register (FP_REGNUM); \
428 write_memory (sp, (char *)&int_buffer, 4); \
429 write_register (FP_REGNUM, sp); \
431 for (regnum = 1; regnum < 31; regnum++) \
432 if (regnum != RP_REGNUM && regnum != FP_REGNUM) \
433 sp = push_word (sp, read_register (regnum)); \
434 for (regnum = FP0_REGNUM; regnum < NUM_REGS; regnum++) \
435 { read_register_bytes (REGISTER_BYTE (regnum), freg_buffer, 8); \
436 sp = push_bytes (sp, freg_buffer, 8);} \
437 sp = push_word (sp, read_register (IPSW_REGNUM)); \
438 sp = push_word (sp, read_register (SAR_REGNUM)); \
439 sp = push_word (sp, read_register (PCOQ_TAIL_REGNUM)); \
440 sp = push_word (sp, read_register (PCSQ_TAIL_REGNUM)); \
441 write_register (SP_REGNUM, sp);}
443 /* Discard from the stack the innermost frame,
444 restoring all saved registers. */
446 { register FRAME frame = get_current_frame (); \
447 register CORE_ADDR fp; \
448 register int regnum; \
449 struct frame_saved_regs fsr; \
450 struct frame_info *fi; \
451 char freg_buffer[8]; \
452 fi = get_frame_info (frame); \
454 get_frame_saved_regs (fi, &fsr); \
455 for (regnum = 31; regnum > 0; regnum--) \
456 if (fsr.regs[regnum]) \
457 write_register (regnum, read_memory_integer (fsr.regs[regnum], 4)); \
458 for (regnum = NUM_REGS - 1; regnum >= FP0_REGNUM ; regnum--) \
459 if (fsr.regs[regnum]) \
460 { read_memory (fsr.regs[regnum], freg_buffer, 8); \
461 write_register_bytes (REGISTER_BYTE (regnum), freg_buffer, 8); }\
462 if (fsr.regs[IPSW_REGNUM]) \
463 write_register (IPSW_REGNUM, \
464 read_memory_integer (fsr.regs[IPSW_REGNUM], 4)); \
465 if (fsr.regs[SAR_REGNUM]) \
466 write_register (SAR_REGNUM, \
467 read_memory_integer (fsr.regs[SAR_REGNUM], 4)); \
468 if (fsr.regs[PCOQ_TAIL_REGNUM]) \
469 write_register (PCOQ_TAIL_REGNUM, \
470 read_memory_integer (fsr.regs[PCOQ_TAIL_REGNUM], 4));\
471 if (fsr.regs[PCSQ_TAIL_REGNUM]) \
472 write_register (PCSQ_TAIL_REGNUM, \
473 read_memory_integer (fsr.regs[PCSQ_TAIL_REGNUM], 4));\
474 write_register (FP_REGNUM, read_memory_integer (fp, 4)); \
475 write_register (SP_REGNUM, fp + 8); \
476 flush_cached_frames (); \
477 set_current_frame (create_new_frame (read_register (FP_REGNUM),\
480 /* This sequence of words is the instructions
482 ; Call stack frame has already been built by gdb. Since we could be calling
483 ; a varargs function, and we do not have the benefit of a stub to put things in
484 ; the right place, we load the first 4 word of arguments into both the general
495 fldds -12(0, r1), fr7
496 ldil 0, r22 ; target will be placed here.
499 ldil 0, r1 ; _sr4export will be placed here.
502 combt,=,n r3, r4, text_space ; If target is in data space, do a
503 ble 0(sr5, r22) ; "normal" procedure call
506 text_space ; Otherwise, go through _sr4export,
507 ble (sr4, r1) ; which will return back here.
511 The dummy decides if the target is in text space or data space. If
512 it's in data space, there's no problem because the target can
513 return back to the dummy. However, if the target is in text space,
514 the dummy calls the secret, undocumented routine _sr4export, which
515 calls a function in text space and can return to any space. Instead
516 of including fake instructions to represent saved registers, we
517 know that the frame is associated with the call dummy and treat it
520 #define CALL_DUMMY { 0x4bda3fb9, 0x4bd93fb1, 0x4bd83fa9, 0x4bd73fa1, \
521 0x37c13fb9, 0x24201004, 0x2c391005, 0x24311006, \
522 0x2c291007, 0x22c00000, 0x36d60000, 0x02c010a3, \
523 0x20200000, 0x34210000, 0x002010a4, 0x80832012, \
524 0xe6c06000, 0x081f0242, 0x00010004, 0xe4202000, \
525 0x6bdf3fd1, 0x00010004}
527 #define CALL_DUMMY_LENGTH 88
528 #define CALL_DUMMY_START_OFFSET 0
529 /* Insert the specified number of args and function address
530 into a call sequence of the above form stored at DUMMYNAME. */
531 #define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
532 { static CORE_ADDR sr4export_address = 0; \
534 if (!sr4export_address) \
536 struct minimal_symbol *msymbol; \
537 msymbol = lookup_minimal_symbol ("_sr4export", (struct objfile *) NULL);\
538 if (msymbol = NULL) \
539 error ("Can't find an address for _sr4export trampoline"); \
541 sr4export_address = msymbol -> address; \
543 dummyname[9] = deposit_21 (fun >> 11, dummyname[9]); \
544 dummyname[10] = deposit_14 (fun & MASK_11, dummyname[10]); \
545 dummyname[12] = deposit_21 (sr4export_address >> 11, dummyname[12]); \
546 dummyname[13] = deposit_14 (sr4export_address & MASK_11, dummyname[13]);\
550 #define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
551 sp = hp_push_arguments(nargs, args, sp, struct_return, struct_addr)
553 /* Write the PC to a random value.
554 On PA-RISC, we need to be sure that the PC space queue is correct. */
556 #define WRITE_PC(addr) \
557 { int space_reg, space = ((addr) >> 30); \
560 space_reg = 43; /* Space reg sr4 */ \
561 else if (space == 1) \
562 space_reg = 48; /* Space reg sr5*/ \
564 error ("pc = %x is in illegal space.", addr); \
565 space_val = read_register (space_reg); \
566 write_register (PCOQ_HEAD_REGNUM, addr); \
567 write_register (PCSQ_HEAD_REGNUM, space_val); \
568 write_register (PCOQ_TAIL_REGNUM, addr); \
569 write_register (PCSQ_TAIL_REGNUM, space_val);}
571 /* Symbol files have two symbol tables. Rather than do this right,
572 like the ELF symbol reading code, massive hackery was added
573 to dbxread.c and partial-stab.h. This flag turns on that
574 hackery, which should all go away FIXME FIXME FIXME FIXME now. */
576 #define GDB_TARGET_IS_HPPA
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