1 /* Target-dependent code for the HP PA-RISC architecture.
3 Copyright (C) 1986-2019 Free Software Foundation, Inc.
5 Contributed by the Center for Software Science at the
6 University of Utah (pa-gdb-bugs@cs.utah.edu).
8 This file is part of GDB.
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 3 of the License, or
13 (at your option) any later version.
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.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 #include "completer.h"
29 #include "arch-utils.h"
30 /* For argument passing to the inferior. */
33 #include "trad-frame.h"
34 #include "frame-unwind.h"
35 #include "frame-base.h"
41 #include "hppa-tdep.h"
44 static int hppa_debug = 0;
46 /* Some local constants. */
47 static const int hppa32_num_regs = 128;
48 static const int hppa64_num_regs = 96;
50 /* We use the objfile->obj_private pointer for two things:
53 * 2. A pointer to any associated shared library object.
55 * #defines are used to help refer to these objects.
58 /* Info about the unwind table associated with an object file.
59 * This is hung off of the "objfile->obj_private" pointer, and
60 * is allocated in the objfile's psymbol obstack. This allows
61 * us to have unique unwind info for each executable and shared
62 * library that we are debugging.
64 struct hppa_unwind_info
66 struct unwind_table_entry *table; /* Pointer to unwind info */
67 struct unwind_table_entry *cache; /* Pointer to last entry we found */
68 int last; /* Index of last entry */
71 struct hppa_objfile_private
73 struct hppa_unwind_info *unwind_info; /* a pointer */
74 struct so_list *so_info; /* a pointer */
77 int dummy_call_sequence_reg;
78 CORE_ADDR dummy_call_sequence_addr;
81 /* hppa-specific object data -- unwind and solib info.
82 TODO/maybe: think about splitting this into two parts; the unwind data is
83 common to all hppa targets, but is only used in this file; we can register
84 that separately and make this static. The solib data is probably hpux-
85 specific, so we can create a separate extern objfile_data that is registered
86 by hppa-hpux-tdep.c and shared with pa64solib.c and somsolib.c. */
87 static const struct objfile_data *hppa_objfile_priv_data = NULL;
89 /* Get at various relevent fields of an instruction word. */
92 #define MASK_14 0x3fff
93 #define MASK_21 0x1fffff
95 /* Sizes (in bytes) of the native unwind entries. */
96 #define UNWIND_ENTRY_SIZE 16
97 #define STUB_UNWIND_ENTRY_SIZE 8
99 /* Routines to extract various sized constants out of hppa
102 /* This assumes that no garbage lies outside of the lower bits of
106 hppa_sign_extend (unsigned val, unsigned bits)
108 return (int) (val >> (bits - 1) ? (-(1 << bits)) | val : val);
111 /* For many immediate values the sign bit is the low bit! */
114 hppa_low_hppa_sign_extend (unsigned val, unsigned bits)
116 return (int) ((val & 0x1 ? (-(1 << (bits - 1))) : 0) | val >> 1);
119 /* Extract the bits at positions between FROM and TO, using HP's numbering
123 hppa_get_field (unsigned word, int from, int to)
125 return ((word) >> (31 - (to)) & ((1 << ((to) - (from) + 1)) - 1));
128 /* Extract the immediate field from a ld{bhw}s instruction. */
131 hppa_extract_5_load (unsigned word)
133 return hppa_low_hppa_sign_extend (word >> 16 & MASK_5, 5);
136 /* Extract the immediate field from a break instruction. */
139 hppa_extract_5r_store (unsigned word)
141 return (word & MASK_5);
144 /* Extract the immediate field from a {sr}sm instruction. */
147 hppa_extract_5R_store (unsigned word)
149 return (word >> 16 & MASK_5);
152 /* Extract a 14 bit immediate field. */
155 hppa_extract_14 (unsigned word)
157 return hppa_low_hppa_sign_extend (word & MASK_14, 14);
160 /* Extract a 21 bit constant. */
163 hppa_extract_21 (unsigned word)
169 val = hppa_get_field (word, 20, 20);
171 val |= hppa_get_field (word, 9, 19);
173 val |= hppa_get_field (word, 5, 6);
175 val |= hppa_get_field (word, 0, 4);
177 val |= hppa_get_field (word, 7, 8);
178 return hppa_sign_extend (val, 21) << 11;
181 /* extract a 17 bit constant from branch instructions, returning the
182 19 bit signed value. */
185 hppa_extract_17 (unsigned word)
187 return hppa_sign_extend (hppa_get_field (word, 19, 28) |
188 hppa_get_field (word, 29, 29) << 10 |
189 hppa_get_field (word, 11, 15) << 11 |
190 (word & 0x1) << 16, 17) << 2;
194 hppa_symbol_address(const char *sym)
196 struct bound_minimal_symbol minsym;
198 minsym = lookup_minimal_symbol (sym, NULL, NULL);
200 return BMSYMBOL_VALUE_ADDRESS (minsym);
202 return (CORE_ADDR)-1;
205 static struct hppa_objfile_private *
206 hppa_init_objfile_priv_data (struct objfile *objfile)
208 hppa_objfile_private *priv
209 = OBSTACK_ZALLOC (&objfile->objfile_obstack, hppa_objfile_private);
211 set_objfile_data (objfile, hppa_objfile_priv_data, priv);
217 /* Compare the start address for two unwind entries returning 1 if
218 the first address is larger than the second, -1 if the second is
219 larger than the first, and zero if they are equal. */
222 compare_unwind_entries (const void *arg1, const void *arg2)
224 const struct unwind_table_entry *a = (const struct unwind_table_entry *) arg1;
225 const struct unwind_table_entry *b = (const struct unwind_table_entry *) arg2;
227 if (a->region_start > b->region_start)
229 else if (a->region_start < b->region_start)
236 record_text_segment_lowaddr (bfd *abfd, asection *section, void *data)
238 if ((section->flags & (SEC_ALLOC | SEC_LOAD | SEC_READONLY))
239 == (SEC_ALLOC | SEC_LOAD | SEC_READONLY))
241 bfd_vma value = section->vma - section->filepos;
242 CORE_ADDR *low_text_segment_address = (CORE_ADDR *)data;
244 if (value < *low_text_segment_address)
245 *low_text_segment_address = value;
250 internalize_unwinds (struct objfile *objfile, struct unwind_table_entry *table,
251 asection *section, unsigned int entries,
252 size_t size, CORE_ADDR text_offset)
254 /* We will read the unwind entries into temporary memory, then
255 fill in the actual unwind table. */
259 struct gdbarch *gdbarch = get_objfile_arch (objfile);
262 char *buf = (char *) alloca (size);
263 CORE_ADDR low_text_segment_address;
265 /* For ELF targets, then unwinds are supposed to
266 be segment relative offsets instead of absolute addresses.
268 Note that when loading a shared library (text_offset != 0) the
269 unwinds are already relative to the text_offset that will be
271 if (gdbarch_tdep (gdbarch)->is_elf && text_offset == 0)
273 low_text_segment_address = -1;
275 bfd_map_over_sections (objfile->obfd,
276 record_text_segment_lowaddr,
277 &low_text_segment_address);
279 text_offset = low_text_segment_address;
281 else if (gdbarch_tdep (gdbarch)->solib_get_text_base)
283 text_offset = gdbarch_tdep (gdbarch)->solib_get_text_base (objfile);
286 bfd_get_section_contents (objfile->obfd, section, buf, 0, size);
288 /* Now internalize the information being careful to handle host/target
290 for (i = 0; i < entries; i++)
292 table[i].region_start = bfd_get_32 (objfile->obfd,
294 table[i].region_start += text_offset;
296 table[i].region_end = bfd_get_32 (objfile->obfd, (bfd_byte *) buf);
297 table[i].region_end += text_offset;
299 tmp = bfd_get_32 (objfile->obfd, (bfd_byte *) buf);
301 table[i].Cannot_unwind = (tmp >> 31) & 0x1;
302 table[i].Millicode = (tmp >> 30) & 0x1;
303 table[i].Millicode_save_sr0 = (tmp >> 29) & 0x1;
304 table[i].Region_description = (tmp >> 27) & 0x3;
305 table[i].reserved = (tmp >> 26) & 0x1;
306 table[i].Entry_SR = (tmp >> 25) & 0x1;
307 table[i].Entry_FR = (tmp >> 21) & 0xf;
308 table[i].Entry_GR = (tmp >> 16) & 0x1f;
309 table[i].Args_stored = (tmp >> 15) & 0x1;
310 table[i].Variable_Frame = (tmp >> 14) & 0x1;
311 table[i].Separate_Package_Body = (tmp >> 13) & 0x1;
312 table[i].Frame_Extension_Millicode = (tmp >> 12) & 0x1;
313 table[i].Stack_Overflow_Check = (tmp >> 11) & 0x1;
314 table[i].Two_Instruction_SP_Increment = (tmp >> 10) & 0x1;
315 table[i].sr4export = (tmp >> 9) & 0x1;
316 table[i].cxx_info = (tmp >> 8) & 0x1;
317 table[i].cxx_try_catch = (tmp >> 7) & 0x1;
318 table[i].sched_entry_seq = (tmp >> 6) & 0x1;
319 table[i].reserved1 = (tmp >> 5) & 0x1;
320 table[i].Save_SP = (tmp >> 4) & 0x1;
321 table[i].Save_RP = (tmp >> 3) & 0x1;
322 table[i].Save_MRP_in_frame = (tmp >> 2) & 0x1;
323 table[i].save_r19 = (tmp >> 1) & 0x1;
324 table[i].Cleanup_defined = tmp & 0x1;
325 tmp = bfd_get_32 (objfile->obfd, (bfd_byte *) buf);
327 table[i].MPE_XL_interrupt_marker = (tmp >> 31) & 0x1;
328 table[i].HP_UX_interrupt_marker = (tmp >> 30) & 0x1;
329 table[i].Large_frame = (tmp >> 29) & 0x1;
330 table[i].alloca_frame = (tmp >> 28) & 0x1;
331 table[i].reserved2 = (tmp >> 27) & 0x1;
332 table[i].Total_frame_size = tmp & 0x7ffffff;
334 /* Stub unwinds are handled elsewhere. */
335 table[i].stub_unwind.stub_type = 0;
336 table[i].stub_unwind.padding = 0;
341 /* Read in the backtrace information stored in the `$UNWIND_START$' section of
342 the object file. This info is used mainly by find_unwind_entry() to find
343 out the stack frame size and frame pointer used by procedures. We put
344 everything on the psymbol obstack in the objfile so that it automatically
345 gets freed when the objfile is destroyed. */
348 read_unwind_info (struct objfile *objfile)
350 asection *unwind_sec, *stub_unwind_sec;
351 size_t unwind_size, stub_unwind_size, total_size;
352 unsigned index, unwind_entries;
353 unsigned stub_entries, total_entries;
354 CORE_ADDR text_offset;
355 struct hppa_unwind_info *ui;
356 struct hppa_objfile_private *obj_private;
358 text_offset = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
359 ui = (struct hppa_unwind_info *) obstack_alloc (&objfile->objfile_obstack,
360 sizeof (struct hppa_unwind_info));
366 /* For reasons unknown the HP PA64 tools generate multiple unwinder
367 sections in a single executable. So we just iterate over every
368 section in the BFD looking for unwinder sections intead of trying
369 to do a lookup with bfd_get_section_by_name.
371 First determine the total size of the unwind tables so that we
372 can allocate memory in a nice big hunk. */
374 for (unwind_sec = objfile->obfd->sections;
376 unwind_sec = unwind_sec->next)
378 if (strcmp (unwind_sec->name, "$UNWIND_START$") == 0
379 || strcmp (unwind_sec->name, ".PARISC.unwind") == 0)
381 unwind_size = bfd_section_size (objfile->obfd, unwind_sec);
382 unwind_entries = unwind_size / UNWIND_ENTRY_SIZE;
384 total_entries += unwind_entries;
388 /* Now compute the size of the stub unwinds. Note the ELF tools do not
389 use stub unwinds at the current time. */
390 stub_unwind_sec = bfd_get_section_by_name (objfile->obfd, "$UNWIND_END$");
394 stub_unwind_size = bfd_section_size (objfile->obfd, stub_unwind_sec);
395 stub_entries = stub_unwind_size / STUB_UNWIND_ENTRY_SIZE;
399 stub_unwind_size = 0;
403 /* Compute total number of unwind entries and their total size. */
404 total_entries += stub_entries;
405 total_size = total_entries * sizeof (struct unwind_table_entry);
407 /* Allocate memory for the unwind table. */
408 ui->table = (struct unwind_table_entry *)
409 obstack_alloc (&objfile->objfile_obstack, total_size);
410 ui->last = total_entries - 1;
412 /* Now read in each unwind section and internalize the standard unwind
415 for (unwind_sec = objfile->obfd->sections;
417 unwind_sec = unwind_sec->next)
419 if (strcmp (unwind_sec->name, "$UNWIND_START$") == 0
420 || strcmp (unwind_sec->name, ".PARISC.unwind") == 0)
422 unwind_size = bfd_section_size (objfile->obfd, unwind_sec);
423 unwind_entries = unwind_size / UNWIND_ENTRY_SIZE;
425 internalize_unwinds (objfile, &ui->table[index], unwind_sec,
426 unwind_entries, unwind_size, text_offset);
427 index += unwind_entries;
431 /* Now read in and internalize the stub unwind entries. */
432 if (stub_unwind_size > 0)
435 char *buf = (char *) alloca (stub_unwind_size);
437 /* Read in the stub unwind entries. */
438 bfd_get_section_contents (objfile->obfd, stub_unwind_sec, buf,
439 0, stub_unwind_size);
441 /* Now convert them into regular unwind entries. */
442 for (i = 0; i < stub_entries; i++, index++)
444 /* Clear out the next unwind entry. */
445 memset (&ui->table[index], 0, sizeof (struct unwind_table_entry));
447 /* Convert offset & size into region_start and region_end.
448 Stuff away the stub type into "reserved" fields. */
449 ui->table[index].region_start = bfd_get_32 (objfile->obfd,
451 ui->table[index].region_start += text_offset;
453 ui->table[index].stub_unwind.stub_type = bfd_get_8 (objfile->obfd,
456 ui->table[index].region_end
457 = ui->table[index].region_start + 4 *
458 (bfd_get_16 (objfile->obfd, (bfd_byte *) buf) - 1);
464 /* Unwind table needs to be kept sorted. */
465 qsort (ui->table, total_entries, sizeof (struct unwind_table_entry),
466 compare_unwind_entries);
468 /* Keep a pointer to the unwind information. */
469 obj_private = (struct hppa_objfile_private *)
470 objfile_data (objfile, hppa_objfile_priv_data);
471 if (obj_private == NULL)
472 obj_private = hppa_init_objfile_priv_data (objfile);
474 obj_private->unwind_info = ui;
477 /* Lookup the unwind (stack backtrace) info for the given PC. We search all
478 of the objfiles seeking the unwind table entry for this PC. Each objfile
479 contains a sorted list of struct unwind_table_entry. Since we do a binary
480 search of the unwind tables, we depend upon them to be sorted. */
482 struct unwind_table_entry *
483 find_unwind_entry (CORE_ADDR pc)
485 int first, middle, last;
486 struct hppa_objfile_private *priv;
489 fprintf_unfiltered (gdb_stdlog, "{ find_unwind_entry %s -> ",
492 /* A function at address 0? Not in HP-UX! */
493 if (pc == (CORE_ADDR) 0)
496 fprintf_unfiltered (gdb_stdlog, "NULL }\n");
500 for (objfile *objfile : all_objfiles (current_program_space))
502 struct hppa_unwind_info *ui;
504 priv = ((struct hppa_objfile_private *)
505 objfile_data (objfile, hppa_objfile_priv_data));
507 ui = ((struct hppa_objfile_private *) priv)->unwind_info;
511 read_unwind_info (objfile);
512 priv = ((struct hppa_objfile_private *)
513 objfile_data (objfile, hppa_objfile_priv_data));
515 error (_("Internal error reading unwind information."));
516 ui = ((struct hppa_objfile_private *) priv)->unwind_info;
519 /* First, check the cache. */
522 && pc >= ui->cache->region_start
523 && pc <= ui->cache->region_end)
526 fprintf_unfiltered (gdb_stdlog, "%s (cached) }\n",
527 hex_string ((uintptr_t) ui->cache));
531 /* Not in the cache, do a binary search. */
536 while (first <= last)
538 middle = (first + last) / 2;
539 if (pc >= ui->table[middle].region_start
540 && pc <= ui->table[middle].region_end)
542 ui->cache = &ui->table[middle];
544 fprintf_unfiltered (gdb_stdlog, "%s }\n",
545 hex_string ((uintptr_t) ui->cache));
546 return &ui->table[middle];
549 if (pc < ui->table[middle].region_start)
557 fprintf_unfiltered (gdb_stdlog, "NULL (not found) }\n");
562 /* Implement the stack_frame_destroyed_p gdbarch method.
564 The epilogue is defined here as the area either on the `bv' instruction
565 itself or an instruction which destroys the function's stack frame.
567 We do not assume that the epilogue is at the end of a function as we can
568 also have return sequences in the middle of a function. */
571 hppa_stack_frame_destroyed_p (struct gdbarch *gdbarch, CORE_ADDR pc)
573 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
574 unsigned long status;
578 status = target_read_memory (pc, buf, 4);
582 inst = extract_unsigned_integer (buf, 4, byte_order);
584 /* The most common way to perform a stack adjustment ldo X(sp),sp
585 We are destroying a stack frame if the offset is negative. */
586 if ((inst & 0xffffc000) == 0x37de0000
587 && hppa_extract_14 (inst) < 0)
590 /* ldw,mb D(sp),X or ldd,mb D(sp),X */
591 if (((inst & 0x0fc010e0) == 0x0fc010e0
592 || (inst & 0x0fc010e0) == 0x0fc010e0)
593 && hppa_extract_14 (inst) < 0)
596 /* bv %r0(%rp) or bv,n %r0(%rp) */
597 if (inst == 0xe840c000 || inst == 0xe840c002)
603 constexpr gdb_byte hppa_break_insn[] = {0x00, 0x01, 0x00, 0x04};
605 typedef BP_MANIPULATION (hppa_break_insn) hppa_breakpoint;
607 /* Return the name of a register. */
610 hppa32_register_name (struct gdbarch *gdbarch, int i)
612 static const char *names[] = {
613 "flags", "r1", "rp", "r3",
614 "r4", "r5", "r6", "r7",
615 "r8", "r9", "r10", "r11",
616 "r12", "r13", "r14", "r15",
617 "r16", "r17", "r18", "r19",
618 "r20", "r21", "r22", "r23",
619 "r24", "r25", "r26", "dp",
620 "ret0", "ret1", "sp", "r31",
621 "sar", "pcoqh", "pcsqh", "pcoqt",
622 "pcsqt", "eiem", "iir", "isr",
623 "ior", "ipsw", "goto", "sr4",
624 "sr0", "sr1", "sr2", "sr3",
625 "sr5", "sr6", "sr7", "cr0",
626 "cr8", "cr9", "ccr", "cr12",
627 "cr13", "cr24", "cr25", "cr26",
628 "mpsfu_high","mpsfu_low","mpsfu_ovflo","pad",
629 "fpsr", "fpe1", "fpe2", "fpe3",
630 "fpe4", "fpe5", "fpe6", "fpe7",
631 "fr4", "fr4R", "fr5", "fr5R",
632 "fr6", "fr6R", "fr7", "fr7R",
633 "fr8", "fr8R", "fr9", "fr9R",
634 "fr10", "fr10R", "fr11", "fr11R",
635 "fr12", "fr12R", "fr13", "fr13R",
636 "fr14", "fr14R", "fr15", "fr15R",
637 "fr16", "fr16R", "fr17", "fr17R",
638 "fr18", "fr18R", "fr19", "fr19R",
639 "fr20", "fr20R", "fr21", "fr21R",
640 "fr22", "fr22R", "fr23", "fr23R",
641 "fr24", "fr24R", "fr25", "fr25R",
642 "fr26", "fr26R", "fr27", "fr27R",
643 "fr28", "fr28R", "fr29", "fr29R",
644 "fr30", "fr30R", "fr31", "fr31R"
646 if (i < 0 || i >= (sizeof (names) / sizeof (*names)))
653 hppa64_register_name (struct gdbarch *gdbarch, int i)
655 static const char *names[] = {
656 "flags", "r1", "rp", "r3",
657 "r4", "r5", "r6", "r7",
658 "r8", "r9", "r10", "r11",
659 "r12", "r13", "r14", "r15",
660 "r16", "r17", "r18", "r19",
661 "r20", "r21", "r22", "r23",
662 "r24", "r25", "r26", "dp",
663 "ret0", "ret1", "sp", "r31",
664 "sar", "pcoqh", "pcsqh", "pcoqt",
665 "pcsqt", "eiem", "iir", "isr",
666 "ior", "ipsw", "goto", "sr4",
667 "sr0", "sr1", "sr2", "sr3",
668 "sr5", "sr6", "sr7", "cr0",
669 "cr8", "cr9", "ccr", "cr12",
670 "cr13", "cr24", "cr25", "cr26",
671 "mpsfu_high","mpsfu_low","mpsfu_ovflo","pad",
672 "fpsr", "fpe1", "fpe2", "fpe3",
673 "fr4", "fr5", "fr6", "fr7",
674 "fr8", "fr9", "fr10", "fr11",
675 "fr12", "fr13", "fr14", "fr15",
676 "fr16", "fr17", "fr18", "fr19",
677 "fr20", "fr21", "fr22", "fr23",
678 "fr24", "fr25", "fr26", "fr27",
679 "fr28", "fr29", "fr30", "fr31"
681 if (i < 0 || i >= (sizeof (names) / sizeof (*names)))
687 /* Map dwarf DBX register numbers to GDB register numbers. */
689 hppa64_dwarf_reg_to_regnum (struct gdbarch *gdbarch, int reg)
691 /* The general registers and the sar are the same in both sets. */
692 if (reg >= 0 && reg <= 32)
695 /* fr4-fr31 are mapped from 72 in steps of 2. */
696 if (reg >= 72 && reg < 72 + 28 * 2 && !(reg & 1))
697 return HPPA64_FP4_REGNUM + (reg - 72) / 2;
702 /* This function pushes a stack frame with arguments as part of the
703 inferior function calling mechanism.
705 This is the version of the function for the 32-bit PA machines, in
706 which later arguments appear at lower addresses. (The stack always
707 grows towards higher addresses.)
709 We simply allocate the appropriate amount of stack space and put
710 arguments into their proper slots. */
713 hppa32_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
714 struct regcache *regcache, CORE_ADDR bp_addr,
715 int nargs, struct value **args, CORE_ADDR sp,
716 function_call_return_method return_method,
717 CORE_ADDR struct_addr)
719 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
721 /* Stack base address at which any pass-by-reference parameters are
723 CORE_ADDR struct_end = 0;
724 /* Stack base address at which the first parameter is stored. */
725 CORE_ADDR param_end = 0;
727 /* Two passes. First pass computes the location of everything,
728 second pass writes the bytes out. */
731 /* Global pointer (r19) of the function we are trying to call. */
734 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
736 for (write_pass = 0; write_pass < 2; write_pass++)
738 CORE_ADDR struct_ptr = 0;
739 /* The first parameter goes into sp-36, each stack slot is 4-bytes.
740 struct_ptr is adjusted for each argument below, so the first
741 argument will end up at sp-36. */
742 CORE_ADDR param_ptr = 32;
744 int small_struct = 0;
746 for (i = 0; i < nargs; i++)
748 struct value *arg = args[i];
749 struct type *type = check_typedef (value_type (arg));
750 /* The corresponding parameter that is pushed onto the
751 stack, and [possibly] passed in a register. */
752 gdb_byte param_val[8];
754 memset (param_val, 0, sizeof param_val);
755 if (TYPE_LENGTH (type) > 8)
757 /* Large parameter, pass by reference. Store the value
758 in "struct" area and then pass its address. */
760 struct_ptr += align_up (TYPE_LENGTH (type), 8);
762 write_memory (struct_end - struct_ptr, value_contents (arg),
764 store_unsigned_integer (param_val, 4, byte_order,
765 struct_end - struct_ptr);
767 else if (TYPE_CODE (type) == TYPE_CODE_INT
768 || TYPE_CODE (type) == TYPE_CODE_ENUM)
770 /* Integer value store, right aligned. "unpack_long"
771 takes care of any sign-extension problems. */
772 param_len = align_up (TYPE_LENGTH (type), 4);
773 store_unsigned_integer (param_val, param_len, byte_order,
775 value_contents (arg)));
777 else if (TYPE_CODE (type) == TYPE_CODE_FLT)
779 /* Floating point value store, right aligned. */
780 param_len = align_up (TYPE_LENGTH (type), 4);
781 memcpy (param_val, value_contents (arg), param_len);
785 param_len = align_up (TYPE_LENGTH (type), 4);
787 /* Small struct value are stored right-aligned. */
788 memcpy (param_val + param_len - TYPE_LENGTH (type),
789 value_contents (arg), TYPE_LENGTH (type));
791 /* Structures of size 5, 6 and 7 bytes are special in that
792 the higher-ordered word is stored in the lower-ordered
793 argument, and even though it is a 8-byte quantity the
794 registers need not be 8-byte aligned. */
795 if (param_len > 4 && param_len < 8)
799 param_ptr += param_len;
800 if (param_len == 8 && !small_struct)
801 param_ptr = align_up (param_ptr, 8);
803 /* First 4 non-FP arguments are passed in gr26-gr23.
804 First 4 32-bit FP arguments are passed in fr4L-fr7L.
805 First 2 64-bit FP arguments are passed in fr5 and fr7.
807 The rest go on the stack, starting at sp-36, towards lower
808 addresses. 8-byte arguments must be aligned to a 8-byte
812 write_memory (param_end - param_ptr, param_val, param_len);
814 /* There are some cases when we don't know the type
815 expected by the callee (e.g. for variadic functions), so
816 pass the parameters in both general and fp regs. */
819 int grreg = 26 - (param_ptr - 36) / 4;
820 int fpLreg = 72 + (param_ptr - 36) / 4 * 2;
821 int fpreg = 74 + (param_ptr - 32) / 8 * 4;
823 regcache->cooked_write (grreg, param_val);
824 regcache->cooked_write (fpLreg, param_val);
828 regcache->cooked_write (grreg + 1, param_val + 4);
830 regcache->cooked_write (fpreg, param_val);
831 regcache->cooked_write (fpreg + 1, param_val + 4);
837 /* Update the various stack pointers. */
840 struct_end = sp + align_up (struct_ptr, 64);
841 /* PARAM_PTR already accounts for all the arguments passed
842 by the user. However, the ABI mandates minimum stack
843 space allocations for outgoing arguments. The ABI also
844 mandates minimum stack alignments which we must
846 param_end = struct_end + align_up (param_ptr, 64);
850 /* If a structure has to be returned, set up register 28 to hold its
852 if (return_method == return_method_struct)
853 regcache_cooked_write_unsigned (regcache, 28, struct_addr);
855 gp = tdep->find_global_pointer (gdbarch, function);
858 regcache_cooked_write_unsigned (regcache, 19, gp);
860 /* Set the return address. */
861 if (!gdbarch_push_dummy_code_p (gdbarch))
862 regcache_cooked_write_unsigned (regcache, HPPA_RP_REGNUM, bp_addr);
864 /* Update the Stack Pointer. */
865 regcache_cooked_write_unsigned (regcache, HPPA_SP_REGNUM, param_end);
870 /* The 64-bit PA-RISC calling conventions are documented in "64-Bit
871 Runtime Architecture for PA-RISC 2.0", which is distributed as part
872 as of the HP-UX Software Transition Kit (STK). This implementation
873 is based on version 3.3, dated October 6, 1997. */
875 /* Check whether TYPE is an "Integral or Pointer Scalar Type". */
878 hppa64_integral_or_pointer_p (const struct type *type)
880 switch (TYPE_CODE (type))
886 case TYPE_CODE_RANGE:
888 int len = TYPE_LENGTH (type);
889 return (len == 1 || len == 2 || len == 4 || len == 8);
893 case TYPE_CODE_RVALUE_REF:
894 return (TYPE_LENGTH (type) == 8);
902 /* Check whether TYPE is a "Floating Scalar Type". */
905 hppa64_floating_p (const struct type *type)
907 switch (TYPE_CODE (type))
911 int len = TYPE_LENGTH (type);
912 return (len == 4 || len == 8 || len == 16);
921 /* If CODE points to a function entry address, try to look up the corresponding
922 function descriptor and return its address instead. If CODE is not a
923 function entry address, then just return it unchanged. */
925 hppa64_convert_code_addr_to_fptr (struct gdbarch *gdbarch, CORE_ADDR code)
927 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
928 struct obj_section *sec, *opd;
930 sec = find_pc_section (code);
935 /* If CODE is in a data section, assume it's already a fptr. */
936 if (!(sec->the_bfd_section->flags & SEC_CODE))
939 ALL_OBJFILE_OSECTIONS (sec->objfile, opd)
941 if (strcmp (opd->the_bfd_section->name, ".opd") == 0)
945 if (opd < sec->objfile->sections_end)
949 for (addr = obj_section_addr (opd);
950 addr < obj_section_endaddr (opd);
956 if (target_read_memory (addr, tmp, sizeof (tmp)))
958 opdaddr = extract_unsigned_integer (tmp, sizeof (tmp), byte_order);
969 hppa64_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
970 struct regcache *regcache, CORE_ADDR bp_addr,
971 int nargs, struct value **args, CORE_ADDR sp,
972 function_call_return_method return_method,
973 CORE_ADDR struct_addr)
975 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
976 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
980 /* "The outgoing parameter area [...] must be aligned at a 16-byte
982 sp = align_up (sp, 16);
984 for (i = 0; i < nargs; i++)
986 struct value *arg = args[i];
987 struct type *type = value_type (arg);
988 int len = TYPE_LENGTH (type);
989 const bfd_byte *valbuf;
993 /* "Each parameter begins on a 64-bit (8-byte) boundary." */
994 offset = align_up (offset, 8);
996 if (hppa64_integral_or_pointer_p (type))
998 /* "Integral scalar parameters smaller than 64 bits are
999 padded on the left (i.e., the value is in the
1000 least-significant bits of the 64-bit storage unit, and
1001 the high-order bits are undefined)." Therefore we can
1002 safely sign-extend them. */
1005 arg = value_cast (builtin_type (gdbarch)->builtin_int64, arg);
1009 else if (hppa64_floating_p (type))
1013 /* "Quad-precision (128-bit) floating-point scalar
1014 parameters are aligned on a 16-byte boundary." */
1015 offset = align_up (offset, 16);
1017 /* "Double-extended- and quad-precision floating-point
1018 parameters within the first 64 bytes of the parameter
1019 list are always passed in general registers." */
1025 /* "Single-precision (32-bit) floating-point scalar
1026 parameters are padded on the left with 32 bits of
1027 garbage (i.e., the floating-point value is in the
1028 least-significant 32 bits of a 64-bit storage
1033 /* "Single- and double-precision floating-point
1034 parameters in this area are passed according to the
1035 available formal parameter information in a function
1036 prototype. [...] If no prototype is in scope,
1037 floating-point parameters must be passed both in the
1038 corresponding general registers and in the
1039 corresponding floating-point registers." */
1040 regnum = HPPA64_FP4_REGNUM + offset / 8;
1042 if (regnum < HPPA64_FP4_REGNUM + 8)
1044 /* "Single-precision floating-point parameters, when
1045 passed in floating-point registers, are passed in
1046 the right halves of the floating point registers;
1047 the left halves are unused." */
1048 regcache->cooked_write_part (regnum, offset % 8, len,
1049 value_contents (arg));
1057 /* "Aggregates larger than 8 bytes are aligned on a
1058 16-byte boundary, possibly leaving an unused argument
1059 slot, which is filled with garbage. If necessary,
1060 they are padded on the right (with garbage), to a
1061 multiple of 8 bytes." */
1062 offset = align_up (offset, 16);
1066 /* If we are passing a function pointer, make sure we pass a function
1067 descriptor instead of the function entry address. */
1068 if (TYPE_CODE (type) == TYPE_CODE_PTR
1069 && TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC)
1071 ULONGEST codeptr, fptr;
1073 codeptr = unpack_long (type, value_contents (arg));
1074 fptr = hppa64_convert_code_addr_to_fptr (gdbarch, codeptr);
1075 store_unsigned_integer (fptrbuf, TYPE_LENGTH (type), byte_order,
1081 valbuf = value_contents (arg);
1084 /* Always store the argument in memory. */
1085 write_memory (sp + offset, valbuf, len);
1087 regnum = HPPA_ARG0_REGNUM - offset / 8;
1088 while (regnum > HPPA_ARG0_REGNUM - 8 && len > 0)
1090 regcache->cooked_write_part (regnum, offset % 8, std::min (len, 8),
1092 offset += std::min (len, 8);
1093 valbuf += std::min (len, 8);
1094 len -= std::min (len, 8);
1101 /* Set up GR29 (%ret1) to hold the argument pointer (ap). */
1102 regcache_cooked_write_unsigned (regcache, HPPA_RET1_REGNUM, sp + 64);
1104 /* Allocate the outgoing parameter area. Make sure the outgoing
1105 parameter area is multiple of 16 bytes in length. */
1106 sp += std::max (align_up (offset, 16), (ULONGEST) 64);
1108 /* Allocate 32-bytes of scratch space. The documentation doesn't
1109 mention this, but it seems to be needed. */
1112 /* Allocate the frame marker area. */
1115 /* If a structure has to be returned, set up GR 28 (%ret0) to hold
1117 if (return_method == return_method_struct)
1118 regcache_cooked_write_unsigned (regcache, HPPA_RET0_REGNUM, struct_addr);
1120 /* Set up GR27 (%dp) to hold the global pointer (gp). */
1121 gp = tdep->find_global_pointer (gdbarch, function);
1123 regcache_cooked_write_unsigned (regcache, HPPA_DP_REGNUM, gp);
1125 /* Set up GR2 (%rp) to hold the return pointer (rp). */
1126 if (!gdbarch_push_dummy_code_p (gdbarch))
1127 regcache_cooked_write_unsigned (regcache, HPPA_RP_REGNUM, bp_addr);
1129 /* Set up GR30 to hold the stack pointer (sp). */
1130 regcache_cooked_write_unsigned (regcache, HPPA_SP_REGNUM, sp);
1136 /* Handle 32/64-bit struct return conventions. */
1138 static enum return_value_convention
1139 hppa32_return_value (struct gdbarch *gdbarch, struct value *function,
1140 struct type *type, struct regcache *regcache,
1141 gdb_byte *readbuf, const gdb_byte *writebuf)
1143 if (TYPE_LENGTH (type) <= 2 * 4)
1145 /* The value always lives in the right hand end of the register
1146 (or register pair)? */
1148 int reg = TYPE_CODE (type) == TYPE_CODE_FLT ? HPPA_FP4_REGNUM : 28;
1149 int part = TYPE_LENGTH (type) % 4;
1150 /* The left hand register contains only part of the value,
1151 transfer that first so that the rest can be xfered as entire
1152 4-byte registers. */
1155 if (readbuf != NULL)
1156 regcache->cooked_read_part (reg, 4 - part, part, readbuf);
1157 if (writebuf != NULL)
1158 regcache->cooked_write_part (reg, 4 - part, part, writebuf);
1161 /* Now transfer the remaining register values. */
1162 for (b = part; b < TYPE_LENGTH (type); b += 4)
1164 if (readbuf != NULL)
1165 regcache->cooked_read (reg, readbuf + b);
1166 if (writebuf != NULL)
1167 regcache->cooked_write (reg, writebuf + b);
1170 return RETURN_VALUE_REGISTER_CONVENTION;
1173 return RETURN_VALUE_STRUCT_CONVENTION;
1176 static enum return_value_convention
1177 hppa64_return_value (struct gdbarch *gdbarch, struct value *function,
1178 struct type *type, struct regcache *regcache,
1179 gdb_byte *readbuf, const gdb_byte *writebuf)
1181 int len = TYPE_LENGTH (type);
1186 /* All return values larget than 128 bits must be aggregate
1188 gdb_assert (!hppa64_integral_or_pointer_p (type));
1189 gdb_assert (!hppa64_floating_p (type));
1191 /* "Aggregate return values larger than 128 bits are returned in
1192 a buffer allocated by the caller. The address of the buffer
1193 must be passed in GR 28." */
1194 return RETURN_VALUE_STRUCT_CONVENTION;
1197 if (hppa64_integral_or_pointer_p (type))
1199 /* "Integral return values are returned in GR 28. Values
1200 smaller than 64 bits are padded on the left (with garbage)." */
1201 regnum = HPPA_RET0_REGNUM;
1204 else if (hppa64_floating_p (type))
1208 /* "Double-extended- and quad-precision floating-point
1209 values are returned in GRs 28 and 29. The sign,
1210 exponent, and most-significant bits of the mantissa are
1211 returned in GR 28; the least-significant bits of the
1212 mantissa are passed in GR 29. For double-extended
1213 precision values, GR 29 is padded on the right with 48
1214 bits of garbage." */
1215 regnum = HPPA_RET0_REGNUM;
1220 /* "Single-precision and double-precision floating-point
1221 return values are returned in FR 4R (single precision) or
1222 FR 4 (double-precision)." */
1223 regnum = HPPA64_FP4_REGNUM;
1229 /* "Aggregate return values up to 64 bits in size are returned
1230 in GR 28. Aggregates smaller than 64 bits are left aligned
1231 in the register; the pad bits on the right are undefined."
1233 "Aggregate return values between 65 and 128 bits are returned
1234 in GRs 28 and 29. The first 64 bits are placed in GR 28, and
1235 the remaining bits are placed, left aligned, in GR 29. The
1236 pad bits on the right of GR 29 (if any) are undefined." */
1237 regnum = HPPA_RET0_REGNUM;
1245 regcache->cooked_read_part (regnum, offset, std::min (len, 8),
1247 readbuf += std::min (len, 8);
1248 len -= std::min (len, 8);
1257 regcache->cooked_write_part (regnum, offset, std::min (len, 8),
1259 writebuf += std::min (len, 8);
1260 len -= std::min (len, 8);
1265 return RETURN_VALUE_REGISTER_CONVENTION;
1270 hppa32_convert_from_func_ptr_addr (struct gdbarch *gdbarch, CORE_ADDR addr,
1271 struct target_ops *targ)
1275 struct type *func_ptr_type = builtin_type (gdbarch)->builtin_func_ptr;
1276 CORE_ADDR plabel = addr & ~3;
1277 return read_memory_typed_address (plabel, func_ptr_type);
1284 hppa32_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr)
1286 /* HP frames are 64-byte (or cache line) aligned (yes that's _byte_
1288 return align_up (addr, 64);
1291 /* Force all frames to 16-byte alignment. Better safe than sorry. */
1294 hppa64_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr)
1296 /* Just always 16-byte align. */
1297 return align_up (addr, 16);
1301 hppa_read_pc (readable_regcache *regcache)
1306 regcache->cooked_read (HPPA_IPSW_REGNUM, &ipsw);
1307 regcache->cooked_read (HPPA_PCOQ_HEAD_REGNUM, &pc);
1309 /* If the current instruction is nullified, then we are effectively
1310 still executing the previous instruction. Pretend we are still
1311 there. This is needed when single stepping; if the nullified
1312 instruction is on a different line, we don't want GDB to think
1313 we've stepped onto that line. */
1314 if (ipsw & 0x00200000)
1321 hppa_write_pc (struct regcache *regcache, CORE_ADDR pc)
1323 regcache_cooked_write_unsigned (regcache, HPPA_PCOQ_HEAD_REGNUM, pc);
1324 regcache_cooked_write_unsigned (regcache, HPPA_PCOQ_TAIL_REGNUM, pc + 4);
1327 /* For the given instruction (INST), return any adjustment it makes
1328 to the stack pointer or zero for no adjustment.
1330 This only handles instructions commonly found in prologues. */
1333 prologue_inst_adjust_sp (unsigned long inst)
1335 /* This must persist across calls. */
1336 static int save_high21;
1338 /* The most common way to perform a stack adjustment ldo X(sp),sp */
1339 if ((inst & 0xffffc000) == 0x37de0000)
1340 return hppa_extract_14 (inst);
1343 if ((inst & 0xffe00000) == 0x6fc00000)
1344 return hppa_extract_14 (inst);
1346 /* std,ma X,D(sp) */
1347 if ((inst & 0xffe00008) == 0x73c00008)
1348 return (inst & 0x1 ? -(1 << 13) : 0) | (((inst >> 4) & 0x3ff) << 3);
1350 /* addil high21,%r30; ldo low11,(%r1),%r30)
1351 save high bits in save_high21 for later use. */
1352 if ((inst & 0xffe00000) == 0x2bc00000)
1354 save_high21 = hppa_extract_21 (inst);
1358 if ((inst & 0xffff0000) == 0x343e0000)
1359 return save_high21 + hppa_extract_14 (inst);
1361 /* fstws as used by the HP compilers. */
1362 if ((inst & 0xffffffe0) == 0x2fd01220)
1363 return hppa_extract_5_load (inst);
1365 /* No adjustment. */
1369 /* Return nonzero if INST is a branch of some kind, else return zero. */
1372 is_branch (unsigned long inst)
1401 /* Return the register number for a GR which is saved by INST or
1402 zero if INST does not save a GR.
1407 https://parisc.wiki.kernel.org/images-parisc/6/68/Pa11_acd.pdf
1410 https://parisc.wiki.kernel.org/images-parisc/7/73/Parisc2.0.pdf
1412 According to Table 6-5 of Chapter 6 (Memory Reference Instructions)
1413 on page 106 in parisc 2.0, all instructions for storing values from
1414 the general registers are:
1416 Store: stb, sth, stw, std (according to Chapter 7, they
1417 are only in both "inst >> 26" and "inst >> 6".
1418 Store Absolute: stwa, stda (according to Chapter 7, they are only
1420 Store Bytes: stby, stdby (according to Chapter 7, they are
1421 only in "inst >> 6").
1423 For (inst >> 26), according to Chapter 7:
1425 The effective memory reference address is formed by the addition
1426 of an immediate displacement to a base value.
1428 - stb: 0x18, store a byte from a general register.
1430 - sth: 0x19, store a halfword from a general register.
1432 - stw: 0x1a, store a word from a general register.
1434 - stwm: 0x1b, store a word from a general register and perform base
1435 register modification (2.0 will still treate it as stw).
1437 - std: 0x1c, store a doubleword from a general register (2.0 only).
1439 - stw: 0x1f, store a word from a general register (2.0 only).
1441 For (inst >> 6) when ((inst >> 26) == 0x03), according to Chapter 7:
1443 The effective memory reference address is formed by the addition
1444 of an index value to a base value specified in the instruction.
1446 - stb: 0x08, store a byte from a general register (1.1 calls stbs).
1448 - sth: 0x09, store a halfword from a general register (1.1 calls
1451 - stw: 0x0a, store a word from a general register (1.1 calls stws).
1453 - std: 0x0b: store a doubleword from a general register (2.0 only)
1455 Implement fast byte moves (stores) to unaligned word or doubleword
1458 - stby: 0x0c, for unaligned word (1.1 calls stbys).
1460 - stdby: 0x0d for unaligned doubleword (2.0 only).
1462 Store a word or doubleword using an absolute memory address formed
1463 using short or long displacement or indexed
1465 - stwa: 0x0e, store a word from a general register to an absolute
1466 address (1.0 calls stwas).
1468 - stda: 0x0f, store a doubleword from a general register to an
1469 absolute address (2.0 only). */
1472 inst_saves_gr (unsigned long inst)
1474 switch ((inst >> 26) & 0x0f)
1477 switch ((inst >> 6) & 0x0f)
1487 return hppa_extract_5R_store (inst);
1496 /* no 0x1d or 0x1e -- according to parisc 2.0 document */
1498 return hppa_extract_5R_store (inst);
1504 /* Return the register number for a FR which is saved by INST or
1505 zero it INST does not save a FR.
1507 Note we only care about full 64bit register stores (that's the only
1508 kind of stores the prologue will use).
1510 FIXME: What about argument stores with the HP compiler in ANSI mode? */
1513 inst_saves_fr (unsigned long inst)
1515 /* Is this an FSTD? */
1516 if ((inst & 0xfc00dfc0) == 0x2c001200)
1517 return hppa_extract_5r_store (inst);
1518 if ((inst & 0xfc000002) == 0x70000002)
1519 return hppa_extract_5R_store (inst);
1520 /* Is this an FSTW? */
1521 if ((inst & 0xfc00df80) == 0x24001200)
1522 return hppa_extract_5r_store (inst);
1523 if ((inst & 0xfc000002) == 0x7c000000)
1524 return hppa_extract_5R_store (inst);
1528 /* Advance PC across any function entry prologue instructions
1529 to reach some "real" code.
1531 Use information in the unwind table to determine what exactly should
1532 be in the prologue. */
1536 skip_prologue_hard_way (struct gdbarch *gdbarch, CORE_ADDR pc,
1537 int stop_before_branch)
1539 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1541 CORE_ADDR orig_pc = pc;
1542 unsigned long inst, stack_remaining, save_gr, save_fr, save_rp, save_sp;
1543 unsigned long args_stored, status, i, restart_gr, restart_fr;
1544 struct unwind_table_entry *u;
1545 int final_iteration;
1551 u = find_unwind_entry (pc);
1555 /* If we are not at the beginning of a function, then return now. */
1556 if ((pc & ~0x3) != u->region_start)
1559 /* This is how much of a frame adjustment we need to account for. */
1560 stack_remaining = u->Total_frame_size << 3;
1562 /* Magic register saves we want to know about. */
1563 save_rp = u->Save_RP;
1564 save_sp = u->Save_SP;
1566 /* An indication that args may be stored into the stack. Unfortunately
1567 the HPUX compilers tend to set this in cases where no args were
1571 /* Turn the Entry_GR field into a bitmask. */
1573 for (i = 3; i < u->Entry_GR + 3; i++)
1575 /* Frame pointer gets saved into a special location. */
1576 if (u->Save_SP && i == HPPA_FP_REGNUM)
1579 save_gr |= (1 << i);
1581 save_gr &= ~restart_gr;
1583 /* Turn the Entry_FR field into a bitmask too. */
1585 for (i = 12; i < u->Entry_FR + 12; i++)
1586 save_fr |= (1 << i);
1587 save_fr &= ~restart_fr;
1589 final_iteration = 0;
1591 /* Loop until we find everything of interest or hit a branch.
1593 For unoptimized GCC code and for any HP CC code this will never ever
1594 examine any user instructions.
1596 For optimzied GCC code we're faced with problems. GCC will schedule
1597 its prologue and make prologue instructions available for delay slot
1598 filling. The end result is user code gets mixed in with the prologue
1599 and a prologue instruction may be in the delay slot of the first branch
1602 Some unexpected things are expected with debugging optimized code, so
1603 we allow this routine to walk past user instructions in optimized
1605 while (save_gr || save_fr || save_rp || save_sp || stack_remaining > 0
1608 unsigned int reg_num;
1609 unsigned long old_stack_remaining, old_save_gr, old_save_fr;
1610 unsigned long old_save_rp, old_save_sp, next_inst;
1612 /* Save copies of all the triggers so we can compare them later
1614 old_save_gr = save_gr;
1615 old_save_fr = save_fr;
1616 old_save_rp = save_rp;
1617 old_save_sp = save_sp;
1618 old_stack_remaining = stack_remaining;
1620 status = target_read_memory (pc, buf, 4);
1621 inst = extract_unsigned_integer (buf, 4, byte_order);
1627 /* Note the interesting effects of this instruction. */
1628 stack_remaining -= prologue_inst_adjust_sp (inst);
1630 /* There are limited ways to store the return pointer into the
1632 if (inst == 0x6bc23fd9 || inst == 0x0fc212c1 || inst == 0x73c23fe1)
1635 /* These are the only ways we save SP into the stack. At this time
1636 the HP compilers never bother to save SP into the stack. */
1637 if ((inst & 0xffffc000) == 0x6fc10000
1638 || (inst & 0xffffc00c) == 0x73c10008)
1641 /* Are we loading some register with an offset from the argument
1643 if ((inst & 0xffe00000) == 0x37a00000
1644 || (inst & 0xffffffe0) == 0x081d0240)
1650 /* Account for general and floating-point register saves. */
1651 reg_num = inst_saves_gr (inst);
1652 save_gr &= ~(1 << reg_num);
1654 /* Ugh. Also account for argument stores into the stack.
1655 Unfortunately args_stored only tells us that some arguments
1656 where stored into the stack. Not how many or what kind!
1658 This is a kludge as on the HP compiler sets this bit and it
1659 never does prologue scheduling. So once we see one, skip past
1660 all of them. We have similar code for the fp arg stores below.
1662 FIXME. Can still die if we have a mix of GR and FR argument
1664 if (reg_num >= (gdbarch_ptr_bit (gdbarch) == 64 ? 19 : 23)
1667 while (reg_num >= (gdbarch_ptr_bit (gdbarch) == 64 ? 19 : 23)
1671 status = target_read_memory (pc, buf, 4);
1672 inst = extract_unsigned_integer (buf, 4, byte_order);
1675 reg_num = inst_saves_gr (inst);
1681 reg_num = inst_saves_fr (inst);
1682 save_fr &= ~(1 << reg_num);
1684 status = target_read_memory (pc + 4, buf, 4);
1685 next_inst = extract_unsigned_integer (buf, 4, byte_order);
1691 /* We've got to be read to handle the ldo before the fp register
1693 if ((inst & 0xfc000000) == 0x34000000
1694 && inst_saves_fr (next_inst) >= 4
1695 && inst_saves_fr (next_inst)
1696 <= (gdbarch_ptr_bit (gdbarch) == 64 ? 11 : 7))
1698 /* So we drop into the code below in a reasonable state. */
1699 reg_num = inst_saves_fr (next_inst);
1703 /* Ugh. Also account for argument stores into the stack.
1704 This is a kludge as on the HP compiler sets this bit and it
1705 never does prologue scheduling. So once we see one, skip past
1708 && reg_num <= (gdbarch_ptr_bit (gdbarch) == 64 ? 11 : 7))
1712 <= (gdbarch_ptr_bit (gdbarch) == 64 ? 11 : 7))
1715 status = target_read_memory (pc, buf, 4);
1716 inst = extract_unsigned_integer (buf, 4, byte_order);
1719 if ((inst & 0xfc000000) != 0x34000000)
1721 status = target_read_memory (pc + 4, buf, 4);
1722 next_inst = extract_unsigned_integer (buf, 4, byte_order);
1725 reg_num = inst_saves_fr (next_inst);
1731 /* Quit if we hit any kind of branch. This can happen if a prologue
1732 instruction is in the delay slot of the first call/branch. */
1733 if (is_branch (inst) && stop_before_branch)
1736 /* What a crock. The HP compilers set args_stored even if no
1737 arguments were stored into the stack (boo hiss). This could
1738 cause this code to then skip a bunch of user insns (up to the
1741 To combat this we try to identify when args_stored was bogusly
1742 set and clear it. We only do this when args_stored is nonzero,
1743 all other resources are accounted for, and nothing changed on
1746 && !(save_gr || save_fr || save_rp || save_sp || stack_remaining > 0)
1747 && old_save_gr == save_gr && old_save_fr == save_fr
1748 && old_save_rp == save_rp && old_save_sp == save_sp
1749 && old_stack_remaining == stack_remaining)
1755 /* !stop_before_branch, so also look at the insn in the delay slot
1757 if (final_iteration)
1759 if (is_branch (inst))
1760 final_iteration = 1;
1763 /* We've got a tenative location for the end of the prologue. However
1764 because of limitations in the unwind descriptor mechanism we may
1765 have went too far into user code looking for the save of a register
1766 that does not exist. So, if there registers we expected to be saved
1767 but never were, mask them out and restart.
1769 This should only happen in optimized code, and should be very rare. */
1770 if (save_gr || (save_fr && !(restart_fr || restart_gr)))
1773 restart_gr = save_gr;
1774 restart_fr = save_fr;
1782 /* Return the address of the PC after the last prologue instruction if
1783 we can determine it from the debug symbols. Else return zero. */
1786 after_prologue (CORE_ADDR pc)
1788 struct symtab_and_line sal;
1789 CORE_ADDR func_addr, func_end;
1791 /* If we can not find the symbol in the partial symbol table, then
1792 there is no hope we can determine the function's start address
1794 if (!find_pc_partial_function (pc, NULL, &func_addr, &func_end))
1797 /* Get the line associated with FUNC_ADDR. */
1798 sal = find_pc_line (func_addr, 0);
1800 /* There are only two cases to consider. First, the end of the source line
1801 is within the function bounds. In that case we return the end of the
1802 source line. Second is the end of the source line extends beyond the
1803 bounds of the current function. We need to use the slow code to
1804 examine instructions in that case.
1806 Anything else is simply a bug elsewhere. Fixing it here is absolutely
1807 the wrong thing to do. In fact, it should be entirely possible for this
1808 function to always return zero since the slow instruction scanning code
1809 is supposed to *always* work. If it does not, then it is a bug. */
1810 if (sal.end < func_end)
1816 /* To skip prologues, I use this predicate. Returns either PC itself
1817 if the code at PC does not look like a function prologue; otherwise
1818 returns an address that (if we're lucky) follows the prologue.
1820 hppa_skip_prologue is called by gdb to place a breakpoint in a function.
1821 It doesn't necessarily skips all the insns in the prologue. In fact
1822 we might not want to skip all the insns because a prologue insn may
1823 appear in the delay slot of the first branch, and we don't want to
1824 skip over the branch in that case. */
1827 hppa_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
1829 CORE_ADDR post_prologue_pc;
1831 /* See if we can determine the end of the prologue via the symbol table.
1832 If so, then return either PC, or the PC after the prologue, whichever
1835 post_prologue_pc = after_prologue (pc);
1837 /* If after_prologue returned a useful address, then use it. Else
1838 fall back on the instruction skipping code.
1840 Some folks have claimed this causes problems because the breakpoint
1841 may be the first instruction of the prologue. If that happens, then
1842 the instruction skipping code has a bug that needs to be fixed. */
1843 if (post_prologue_pc != 0)
1844 return std::max (pc, post_prologue_pc);
1846 return (skip_prologue_hard_way (gdbarch, pc, 1));
1849 /* Return an unwind entry that falls within the frame's code block. */
1851 static struct unwind_table_entry *
1852 hppa_find_unwind_entry_in_block (struct frame_info *this_frame)
1854 CORE_ADDR pc = get_frame_address_in_block (this_frame);
1856 /* FIXME drow/20070101: Calling gdbarch_addr_bits_remove on the
1857 result of get_frame_address_in_block implies a problem.
1858 The bits should have been removed earlier, before the return
1859 value of gdbarch_unwind_pc. That might be happening already;
1860 if it isn't, it should be fixed. Then this call can be
1862 pc = gdbarch_addr_bits_remove (get_frame_arch (this_frame), pc);
1863 return find_unwind_entry (pc);
1866 struct hppa_frame_cache
1869 struct trad_frame_saved_reg *saved_regs;
1872 static struct hppa_frame_cache *
1873 hppa_frame_cache (struct frame_info *this_frame, void **this_cache)
1875 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1876 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1877 int word_size = gdbarch_ptr_bit (gdbarch) / 8;
1878 struct hppa_frame_cache *cache;
1882 struct unwind_table_entry *u;
1883 CORE_ADDR prologue_end;
1888 fprintf_unfiltered (gdb_stdlog, "{ hppa_frame_cache (frame=%d) -> ",
1889 frame_relative_level(this_frame));
1891 if ((*this_cache) != NULL)
1894 fprintf_unfiltered (gdb_stdlog, "base=%s (cached) }",
1895 paddress (gdbarch, ((struct hppa_frame_cache *)*this_cache)->base));
1896 return (struct hppa_frame_cache *) (*this_cache);
1898 cache = FRAME_OBSTACK_ZALLOC (struct hppa_frame_cache);
1899 (*this_cache) = cache;
1900 cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
1903 u = hppa_find_unwind_entry_in_block (this_frame);
1907 fprintf_unfiltered (gdb_stdlog, "base=NULL (no unwind entry) }");
1908 return (struct hppa_frame_cache *) (*this_cache);
1911 /* Turn the Entry_GR field into a bitmask. */
1913 for (i = 3; i < u->Entry_GR + 3; i++)
1915 /* Frame pointer gets saved into a special location. */
1916 if (u->Save_SP && i == HPPA_FP_REGNUM)
1919 saved_gr_mask |= (1 << i);
1922 /* Turn the Entry_FR field into a bitmask too. */
1924 for (i = 12; i < u->Entry_FR + 12; i++)
1925 saved_fr_mask |= (1 << i);
1927 /* Loop until we find everything of interest or hit a branch.
1929 For unoptimized GCC code and for any HP CC code this will never ever
1930 examine any user instructions.
1932 For optimized GCC code we're faced with problems. GCC will schedule
1933 its prologue and make prologue instructions available for delay slot
1934 filling. The end result is user code gets mixed in with the prologue
1935 and a prologue instruction may be in the delay slot of the first branch
1938 Some unexpected things are expected with debugging optimized code, so
1939 we allow this routine to walk past user instructions in optimized
1942 int final_iteration = 0;
1943 CORE_ADDR pc, start_pc, end_pc;
1944 int looking_for_sp = u->Save_SP;
1945 int looking_for_rp = u->Save_RP;
1948 /* We have to use skip_prologue_hard_way instead of just
1949 skip_prologue_using_sal, in case we stepped into a function without
1950 symbol information. hppa_skip_prologue also bounds the returned
1951 pc by the passed in pc, so it will not return a pc in the next
1954 We used to call hppa_skip_prologue to find the end of the prologue,
1955 but if some non-prologue instructions get scheduled into the prologue,
1956 and the program is compiled with debug information, the "easy" way
1957 in hppa_skip_prologue will return a prologue end that is too early
1958 for us to notice any potential frame adjustments. */
1960 /* We used to use get_frame_func to locate the beginning of the
1961 function to pass to skip_prologue. However, when objects are
1962 compiled without debug symbols, get_frame_func can return the wrong
1963 function (or 0). We can do better than that by using unwind records.
1964 This only works if the Region_description of the unwind record
1965 indicates that it includes the entry point of the function.
1966 HP compilers sometimes generate unwind records for regions that
1967 do not include the entry or exit point of a function. GNU tools
1970 if ((u->Region_description & 0x2) == 0)
1971 start_pc = u->region_start;
1973 start_pc = get_frame_func (this_frame);
1975 prologue_end = skip_prologue_hard_way (gdbarch, start_pc, 0);
1976 end_pc = get_frame_pc (this_frame);
1978 if (prologue_end != 0 && end_pc > prologue_end)
1979 end_pc = prologue_end;
1984 ((saved_gr_mask || saved_fr_mask
1985 || looking_for_sp || looking_for_rp
1986 || frame_size < (u->Total_frame_size << 3))
1994 if (!safe_frame_unwind_memory (this_frame, pc, buf4, sizeof buf4))
1996 error (_("Cannot read instruction at %s."),
1997 paddress (gdbarch, pc));
1998 return (struct hppa_frame_cache *) (*this_cache);
2001 inst = extract_unsigned_integer (buf4, sizeof buf4, byte_order);
2003 /* Note the interesting effects of this instruction. */
2004 frame_size += prologue_inst_adjust_sp (inst);
2006 /* There are limited ways to store the return pointer into the
2008 if (inst == 0x6bc23fd9) /* stw rp,-0x14(sr0,sp) */
2011 cache->saved_regs[HPPA_RP_REGNUM].addr = -20;
2013 else if (inst == 0x6bc23fd1) /* stw rp,-0x18(sr0,sp) */
2016 cache->saved_regs[HPPA_RP_REGNUM].addr = -24;
2018 else if (inst == 0x0fc212c1
2019 || inst == 0x73c23fe1) /* std rp,-0x10(sr0,sp) */
2022 cache->saved_regs[HPPA_RP_REGNUM].addr = -16;
2025 /* Check to see if we saved SP into the stack. This also
2026 happens to indicate the location of the saved frame
2028 if ((inst & 0xffffc000) == 0x6fc10000 /* stw,ma r1,N(sr0,sp) */
2029 || (inst & 0xffffc00c) == 0x73c10008) /* std,ma r1,N(sr0,sp) */
2032 cache->saved_regs[HPPA_FP_REGNUM].addr = 0;
2034 else if (inst == 0x08030241) /* copy %r3, %r1 */
2039 /* Account for general and floating-point register saves. */
2040 reg = inst_saves_gr (inst);
2041 if (reg >= 3 && reg <= 18
2042 && (!u->Save_SP || reg != HPPA_FP_REGNUM))
2044 saved_gr_mask &= ~(1 << reg);
2045 if ((inst >> 26) == 0x1b && hppa_extract_14 (inst) >= 0)
2046 /* stwm with a positive displacement is a _post_
2048 cache->saved_regs[reg].addr = 0;
2049 else if ((inst & 0xfc00000c) == 0x70000008)
2050 /* A std has explicit post_modify forms. */
2051 cache->saved_regs[reg].addr = 0;
2056 if ((inst >> 26) == 0x1c)
2057 offset = (inst & 0x1 ? -(1 << 13) : 0)
2058 | (((inst >> 4) & 0x3ff) << 3);
2059 else if ((inst >> 26) == 0x03)
2060 offset = hppa_low_hppa_sign_extend (inst & 0x1f, 5);
2062 offset = hppa_extract_14 (inst);
2064 /* Handle code with and without frame pointers. */
2066 cache->saved_regs[reg].addr = offset;
2068 cache->saved_regs[reg].addr
2069 = (u->Total_frame_size << 3) + offset;
2073 /* GCC handles callee saved FP regs a little differently.
2075 It emits an instruction to put the value of the start of
2076 the FP store area into %r1. It then uses fstds,ma with a
2077 basereg of %r1 for the stores.
2079 HP CC emits them at the current stack pointer modifying the
2080 stack pointer as it stores each register. */
2082 /* ldo X(%r3),%r1 or ldo X(%r30),%r1. */
2083 if ((inst & 0xffffc000) == 0x34610000
2084 || (inst & 0xffffc000) == 0x37c10000)
2085 fp_loc = hppa_extract_14 (inst);
2087 reg = inst_saves_fr (inst);
2088 if (reg >= 12 && reg <= 21)
2090 /* Note +4 braindamage below is necessary because the FP
2091 status registers are internally 8 registers rather than
2092 the expected 4 registers. */
2093 saved_fr_mask &= ~(1 << reg);
2096 /* 1st HP CC FP register store. After this
2097 instruction we've set enough state that the GCC and
2098 HPCC code are both handled in the same manner. */
2099 cache->saved_regs[reg + HPPA_FP4_REGNUM + 4].addr = 0;
2104 cache->saved_regs[reg + HPPA_FP0_REGNUM + 4].addr = fp_loc;
2109 /* Quit if we hit any kind of branch the previous iteration. */
2110 if (final_iteration)
2112 /* We want to look precisely one instruction beyond the branch
2113 if we have not found everything yet. */
2114 if (is_branch (inst))
2115 final_iteration = 1;
2120 /* The frame base always represents the value of %sp at entry to
2121 the current function (and is thus equivalent to the "saved"
2123 CORE_ADDR this_sp = get_frame_register_unsigned (this_frame,
2128 fprintf_unfiltered (gdb_stdlog, " (this_sp=%s, pc=%s, "
2129 "prologue_end=%s) ",
2130 paddress (gdbarch, this_sp),
2131 paddress (gdbarch, get_frame_pc (this_frame)),
2132 paddress (gdbarch, prologue_end));
2134 /* Check to see if a frame pointer is available, and use it for
2135 frame unwinding if it is.
2137 There are some situations where we need to rely on the frame
2138 pointer to do stack unwinding. For example, if a function calls
2139 alloca (), the stack pointer can get adjusted inside the body of
2140 the function. In this case, the ABI requires that the compiler
2141 maintain a frame pointer for the function.
2143 The unwind record has a flag (alloca_frame) that indicates that
2144 a function has a variable frame; unfortunately, gcc/binutils
2145 does not set this flag. Instead, whenever a frame pointer is used
2146 and saved on the stack, the Save_SP flag is set. We use this to
2147 decide whether to use the frame pointer for unwinding.
2149 TODO: For the HP compiler, maybe we should use the alloca_frame flag
2150 instead of Save_SP. */
2152 fp = get_frame_register_unsigned (this_frame, HPPA_FP_REGNUM);
2154 if (u->alloca_frame)
2155 fp -= u->Total_frame_size << 3;
2157 if (get_frame_pc (this_frame) >= prologue_end
2158 && (u->Save_SP || u->alloca_frame) && fp != 0)
2163 fprintf_unfiltered (gdb_stdlog, " (base=%s) [frame pointer]",
2164 paddress (gdbarch, cache->base));
2167 && trad_frame_addr_p (cache->saved_regs, HPPA_SP_REGNUM))
2169 /* Both we're expecting the SP to be saved and the SP has been
2170 saved. The entry SP value is saved at this frame's SP
2172 cache->base = read_memory_integer (this_sp, word_size, byte_order);
2175 fprintf_unfiltered (gdb_stdlog, " (base=%s) [saved]",
2176 paddress (gdbarch, cache->base));
2180 /* The prologue has been slowly allocating stack space. Adjust
2182 cache->base = this_sp - frame_size;
2184 fprintf_unfiltered (gdb_stdlog, " (base=%s) [unwind adjust]",
2185 paddress (gdbarch, cache->base));
2188 trad_frame_set_value (cache->saved_regs, HPPA_SP_REGNUM, cache->base);
2191 /* The PC is found in the "return register", "Millicode" uses "r31"
2192 as the return register while normal code uses "rp". */
2195 if (trad_frame_addr_p (cache->saved_regs, 31))
2197 cache->saved_regs[HPPA_PCOQ_HEAD_REGNUM] = cache->saved_regs[31];
2199 fprintf_unfiltered (gdb_stdlog, " (pc=r31) [stack] } ");
2203 ULONGEST r31 = get_frame_register_unsigned (this_frame, 31);
2204 trad_frame_set_value (cache->saved_regs, HPPA_PCOQ_HEAD_REGNUM, r31);
2206 fprintf_unfiltered (gdb_stdlog, " (pc=r31) [frame] } ");
2211 if (trad_frame_addr_p (cache->saved_regs, HPPA_RP_REGNUM))
2213 cache->saved_regs[HPPA_PCOQ_HEAD_REGNUM] =
2214 cache->saved_regs[HPPA_RP_REGNUM];
2216 fprintf_unfiltered (gdb_stdlog, " (pc=rp) [stack] } ");
2220 ULONGEST rp = get_frame_register_unsigned (this_frame,
2222 trad_frame_set_value (cache->saved_regs, HPPA_PCOQ_HEAD_REGNUM, rp);
2224 fprintf_unfiltered (gdb_stdlog, " (pc=rp) [frame] } ");
2228 /* If Save_SP is set, then we expect the frame pointer to be saved in the
2229 frame. However, there is a one-insn window where we haven't saved it
2230 yet, but we've already clobbered it. Detect this case and fix it up.
2232 The prologue sequence for frame-pointer functions is:
2233 0: stw %rp, -20(%sp)
2236 c: stw,ma %r1, XX(%sp)
2238 So if we are at offset c, the r3 value that we want is not yet saved
2239 on the stack, but it's been overwritten. The prologue analyzer will
2240 set fp_in_r1 when it sees the copy insn so we know to get the value
2242 if (u->Save_SP && !trad_frame_addr_p (cache->saved_regs, HPPA_FP_REGNUM)
2245 ULONGEST r1 = get_frame_register_unsigned (this_frame, 1);
2246 trad_frame_set_value (cache->saved_regs, HPPA_FP_REGNUM, r1);
2250 /* Convert all the offsets into addresses. */
2252 for (reg = 0; reg < gdbarch_num_regs (gdbarch); reg++)
2254 if (trad_frame_addr_p (cache->saved_regs, reg))
2255 cache->saved_regs[reg].addr += cache->base;
2260 struct gdbarch_tdep *tdep;
2262 tdep = gdbarch_tdep (gdbarch);
2264 if (tdep->unwind_adjust_stub)
2265 tdep->unwind_adjust_stub (this_frame, cache->base, cache->saved_regs);
2269 fprintf_unfiltered (gdb_stdlog, "base=%s }",
2270 paddress (gdbarch, ((struct hppa_frame_cache *)*this_cache)->base));
2271 return (struct hppa_frame_cache *) (*this_cache);
2275 hppa_frame_this_id (struct frame_info *this_frame, void **this_cache,
2276 struct frame_id *this_id)
2278 struct hppa_frame_cache *info;
2279 struct unwind_table_entry *u;
2281 info = hppa_frame_cache (this_frame, this_cache);
2282 u = hppa_find_unwind_entry_in_block (this_frame);
2284 (*this_id) = frame_id_build (info->base, u->region_start);
2287 static struct value *
2288 hppa_frame_prev_register (struct frame_info *this_frame,
2289 void **this_cache, int regnum)
2291 struct hppa_frame_cache *info = hppa_frame_cache (this_frame, this_cache);
2293 return hppa_frame_prev_register_helper (this_frame,
2294 info->saved_regs, regnum);
2298 hppa_frame_unwind_sniffer (const struct frame_unwind *self,
2299 struct frame_info *this_frame, void **this_cache)
2301 if (hppa_find_unwind_entry_in_block (this_frame))
2307 static const struct frame_unwind hppa_frame_unwind =
2310 default_frame_unwind_stop_reason,
2312 hppa_frame_prev_register,
2314 hppa_frame_unwind_sniffer
2317 /* This is a generic fallback frame unwinder that kicks in if we fail all
2318 the other ones. Normally we would expect the stub and regular unwinder
2319 to work, but in some cases we might hit a function that just doesn't
2320 have any unwind information available. In this case we try to do
2321 unwinding solely based on code reading. This is obviously going to be
2322 slow, so only use this as a last resort. Currently this will only
2323 identify the stack and pc for the frame. */
2325 static struct hppa_frame_cache *
2326 hppa_fallback_frame_cache (struct frame_info *this_frame, void **this_cache)
2328 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2329 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2330 struct hppa_frame_cache *cache;
2331 unsigned int frame_size = 0;
2336 fprintf_unfiltered (gdb_stdlog,
2337 "{ hppa_fallback_frame_cache (frame=%d) -> ",
2338 frame_relative_level (this_frame));
2340 cache = FRAME_OBSTACK_ZALLOC (struct hppa_frame_cache);
2341 (*this_cache) = cache;
2342 cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
2344 start_pc = get_frame_func (this_frame);
2347 CORE_ADDR cur_pc = get_frame_pc (this_frame);
2350 for (pc = start_pc; pc < cur_pc; pc += 4)
2354 insn = read_memory_unsigned_integer (pc, 4, byte_order);
2355 frame_size += prologue_inst_adjust_sp (insn);
2357 /* There are limited ways to store the return pointer into the
2359 if (insn == 0x6bc23fd9) /* stw rp,-0x14(sr0,sp) */
2361 cache->saved_regs[HPPA_RP_REGNUM].addr = -20;
2364 else if (insn == 0x0fc212c1
2365 || insn == 0x73c23fe1) /* std rp,-0x10(sr0,sp) */
2367 cache->saved_regs[HPPA_RP_REGNUM].addr = -16;
2374 fprintf_unfiltered (gdb_stdlog, " frame_size=%d, found_rp=%d }\n",
2375 frame_size, found_rp);
2377 cache->base = get_frame_register_unsigned (this_frame, HPPA_SP_REGNUM);
2378 cache->base -= frame_size;
2379 trad_frame_set_value (cache->saved_regs, HPPA_SP_REGNUM, cache->base);
2381 if (trad_frame_addr_p (cache->saved_regs, HPPA_RP_REGNUM))
2383 cache->saved_regs[HPPA_RP_REGNUM].addr += cache->base;
2384 cache->saved_regs[HPPA_PCOQ_HEAD_REGNUM] =
2385 cache->saved_regs[HPPA_RP_REGNUM];
2390 rp = get_frame_register_unsigned (this_frame, HPPA_RP_REGNUM);
2391 trad_frame_set_value (cache->saved_regs, HPPA_PCOQ_HEAD_REGNUM, rp);
2398 hppa_fallback_frame_this_id (struct frame_info *this_frame, void **this_cache,
2399 struct frame_id *this_id)
2401 struct hppa_frame_cache *info =
2402 hppa_fallback_frame_cache (this_frame, this_cache);
2404 (*this_id) = frame_id_build (info->base, get_frame_func (this_frame));
2407 static struct value *
2408 hppa_fallback_frame_prev_register (struct frame_info *this_frame,
2409 void **this_cache, int regnum)
2411 struct hppa_frame_cache *info
2412 = hppa_fallback_frame_cache (this_frame, this_cache);
2414 return hppa_frame_prev_register_helper (this_frame,
2415 info->saved_regs, regnum);
2418 static const struct frame_unwind hppa_fallback_frame_unwind =
2421 default_frame_unwind_stop_reason,
2422 hppa_fallback_frame_this_id,
2423 hppa_fallback_frame_prev_register,
2425 default_frame_sniffer
2428 /* Stub frames, used for all kinds of call stubs. */
2429 struct hppa_stub_unwind_cache
2432 struct trad_frame_saved_reg *saved_regs;
2435 static struct hppa_stub_unwind_cache *
2436 hppa_stub_frame_unwind_cache (struct frame_info *this_frame,
2439 struct hppa_stub_unwind_cache *info;
2442 return (struct hppa_stub_unwind_cache *) *this_cache;
2444 info = FRAME_OBSTACK_ZALLOC (struct hppa_stub_unwind_cache);
2446 info->saved_regs = trad_frame_alloc_saved_regs (this_frame);
2448 info->base = get_frame_register_unsigned (this_frame, HPPA_SP_REGNUM);
2450 /* By default we assume that stubs do not change the rp. */
2451 info->saved_regs[HPPA_PCOQ_HEAD_REGNUM].realreg = HPPA_RP_REGNUM;
2457 hppa_stub_frame_this_id (struct frame_info *this_frame,
2458 void **this_prologue_cache,
2459 struct frame_id *this_id)
2461 struct hppa_stub_unwind_cache *info
2462 = hppa_stub_frame_unwind_cache (this_frame, this_prologue_cache);
2465 *this_id = frame_id_build (info->base, get_frame_func (this_frame));
2468 static struct value *
2469 hppa_stub_frame_prev_register (struct frame_info *this_frame,
2470 void **this_prologue_cache, int regnum)
2472 struct hppa_stub_unwind_cache *info
2473 = hppa_stub_frame_unwind_cache (this_frame, this_prologue_cache);
2476 error (_("Requesting registers from null frame."));
2478 return hppa_frame_prev_register_helper (this_frame,
2479 info->saved_regs, regnum);
2483 hppa_stub_unwind_sniffer (const struct frame_unwind *self,
2484 struct frame_info *this_frame,
2487 CORE_ADDR pc = get_frame_address_in_block (this_frame);
2488 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2489 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
2492 || (tdep->in_solib_call_trampoline != NULL
2493 && tdep->in_solib_call_trampoline (gdbarch, pc))
2494 || gdbarch_in_solib_return_trampoline (gdbarch, pc, NULL))
2499 static const struct frame_unwind hppa_stub_frame_unwind = {
2501 default_frame_unwind_stop_reason,
2502 hppa_stub_frame_this_id,
2503 hppa_stub_frame_prev_register,
2505 hppa_stub_unwind_sniffer
2508 static struct frame_id
2509 hppa_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
2511 return frame_id_build (get_frame_register_unsigned (this_frame,
2513 get_frame_pc (this_frame));
2517 hppa_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
2522 ipsw = frame_unwind_register_unsigned (next_frame, HPPA_IPSW_REGNUM);
2523 pc = frame_unwind_register_unsigned (next_frame, HPPA_PCOQ_HEAD_REGNUM);
2525 /* If the current instruction is nullified, then we are effectively
2526 still executing the previous instruction. Pretend we are still
2527 there. This is needed when single stepping; if the nullified
2528 instruction is on a different line, we don't want GDB to think
2529 we've stepped onto that line. */
2530 if (ipsw & 0x00200000)
2536 /* Return the minimal symbol whose name is NAME and stub type is STUB_TYPE.
2537 Return NULL if no such symbol was found. */
2539 struct bound_minimal_symbol
2540 hppa_lookup_stub_minimal_symbol (const char *name,
2541 enum unwind_stub_types stub_type)
2543 struct bound_minimal_symbol result = { NULL, NULL };
2545 for (objfile *objfile : all_objfiles (current_program_space))
2547 for (minimal_symbol *msym : objfile_msymbols (objfile))
2549 if (strcmp (MSYMBOL_LINKAGE_NAME (msym), name) == 0)
2551 struct unwind_table_entry *u;
2553 u = find_unwind_entry (MSYMBOL_VALUE (msym));
2554 if (u != NULL && u->stub_unwind.stub_type == stub_type)
2556 result.objfile = objfile;
2557 result.minsym = msym;
2568 unwind_command (const char *exp, int from_tty)
2571 struct unwind_table_entry *u;
2573 /* If we have an expression, evaluate it and use it as the address. */
2575 if (exp != 0 && *exp != 0)
2576 address = parse_and_eval_address (exp);
2580 u = find_unwind_entry (address);
2584 printf_unfiltered ("Can't find unwind table entry for %s\n", exp);
2588 printf_unfiltered ("unwind_table_entry (%s):\n", host_address_to_string (u));
2590 printf_unfiltered ("\tregion_start = %s\n", hex_string (u->region_start));
2591 gdb_flush (gdb_stdout);
2593 printf_unfiltered ("\tregion_end = %s\n", hex_string (u->region_end));
2594 gdb_flush (gdb_stdout);
2596 #define pif(FLD) if (u->FLD) printf_unfiltered (" "#FLD);
2598 printf_unfiltered ("\n\tflags =");
2599 pif (Cannot_unwind);
2601 pif (Millicode_save_sr0);
2604 pif (Variable_Frame);
2605 pif (Separate_Package_Body);
2606 pif (Frame_Extension_Millicode);
2607 pif (Stack_Overflow_Check);
2608 pif (Two_Instruction_SP_Increment);
2611 pif (cxx_try_catch);
2612 pif (sched_entry_seq);
2615 pif (Save_MRP_in_frame);
2617 pif (Cleanup_defined);
2618 pif (MPE_XL_interrupt_marker);
2619 pif (HP_UX_interrupt_marker);
2623 putchar_unfiltered ('\n');
2625 #define pin(FLD) printf_unfiltered ("\t"#FLD" = 0x%x\n", u->FLD);
2627 pin (Region_description);
2630 pin (Total_frame_size);
2632 if (u->stub_unwind.stub_type)
2634 printf_unfiltered ("\tstub type = ");
2635 switch (u->stub_unwind.stub_type)
2638 printf_unfiltered ("long branch\n");
2640 case PARAMETER_RELOCATION:
2641 printf_unfiltered ("parameter relocation\n");
2644 printf_unfiltered ("export\n");
2647 printf_unfiltered ("import\n");
2650 printf_unfiltered ("import shlib\n");
2653 printf_unfiltered ("unknown (%d)\n", u->stub_unwind.stub_type);
2658 /* Return the GDB type object for the "standard" data type of data in
2661 static struct type *
2662 hppa32_register_type (struct gdbarch *gdbarch, int regnum)
2664 if (regnum < HPPA_FP4_REGNUM)
2665 return builtin_type (gdbarch)->builtin_uint32;
2667 return builtin_type (gdbarch)->builtin_float;
2670 static struct type *
2671 hppa64_register_type (struct gdbarch *gdbarch, int regnum)
2673 if (regnum < HPPA64_FP4_REGNUM)
2674 return builtin_type (gdbarch)->builtin_uint64;
2676 return builtin_type (gdbarch)->builtin_double;
2679 /* Return non-zero if REGNUM is not a register available to the user
2680 through ptrace/ttrace. */
2683 hppa32_cannot_store_register (struct gdbarch *gdbarch, int regnum)
2686 || regnum == HPPA_PCSQ_HEAD_REGNUM
2687 || (regnum >= HPPA_PCSQ_TAIL_REGNUM && regnum < HPPA_IPSW_REGNUM)
2688 || (regnum > HPPA_IPSW_REGNUM && regnum < HPPA_FP4_REGNUM));
2692 hppa32_cannot_fetch_register (struct gdbarch *gdbarch, int regnum)
2694 /* cr26 and cr27 are readable (but not writable) from userspace. */
2695 if (regnum == HPPA_CR26_REGNUM || regnum == HPPA_CR27_REGNUM)
2698 return hppa32_cannot_store_register (gdbarch, regnum);
2702 hppa64_cannot_store_register (struct gdbarch *gdbarch, int regnum)
2705 || regnum == HPPA_PCSQ_HEAD_REGNUM
2706 || (regnum >= HPPA_PCSQ_TAIL_REGNUM && regnum < HPPA_IPSW_REGNUM)
2707 || (regnum > HPPA_IPSW_REGNUM && regnum < HPPA64_FP4_REGNUM));
2711 hppa64_cannot_fetch_register (struct gdbarch *gdbarch, int regnum)
2713 /* cr26 and cr27 are readable (but not writable) from userspace. */
2714 if (regnum == HPPA_CR26_REGNUM || regnum == HPPA_CR27_REGNUM)
2717 return hppa64_cannot_store_register (gdbarch, regnum);
2721 hppa_addr_bits_remove (struct gdbarch *gdbarch, CORE_ADDR addr)
2723 /* The low two bits of the PC on the PA contain the privilege level.
2724 Some genius implementing a (non-GCC) compiler apparently decided
2725 this means that "addresses" in a text section therefore include a
2726 privilege level, and thus symbol tables should contain these bits.
2727 This seems like a bonehead thing to do--anyway, it seems to work
2728 for our purposes to just ignore those bits. */
2730 return (addr &= ~0x3);
2733 /* Get the ARGIth function argument for the current function. */
2736 hppa_fetch_pointer_argument (struct frame_info *frame, int argi,
2739 return get_frame_register_unsigned (frame, HPPA_R0_REGNUM + 26 - argi);
2742 static enum register_status
2743 hppa_pseudo_register_read (struct gdbarch *gdbarch, readable_regcache *regcache,
2744 int regnum, gdb_byte *buf)
2746 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2748 enum register_status status;
2750 status = regcache->raw_read (regnum, &tmp);
2751 if (status == REG_VALID)
2753 if (regnum == HPPA_PCOQ_HEAD_REGNUM || regnum == HPPA_PCOQ_TAIL_REGNUM)
2755 store_unsigned_integer (buf, sizeof tmp, byte_order, tmp);
2761 hppa_find_global_pointer (struct gdbarch *gdbarch, struct value *function)
2767 hppa_frame_prev_register_helper (struct frame_info *this_frame,
2768 struct trad_frame_saved_reg saved_regs[],
2771 struct gdbarch *arch = get_frame_arch (this_frame);
2772 enum bfd_endian byte_order = gdbarch_byte_order (arch);
2774 if (regnum == HPPA_PCOQ_TAIL_REGNUM)
2776 int size = register_size (arch, HPPA_PCOQ_HEAD_REGNUM);
2778 struct value *pcoq_val =
2779 trad_frame_get_prev_register (this_frame, saved_regs,
2780 HPPA_PCOQ_HEAD_REGNUM);
2782 pc = extract_unsigned_integer (value_contents_all (pcoq_val),
2784 return frame_unwind_got_constant (this_frame, regnum, pc + 4);
2787 return trad_frame_get_prev_register (this_frame, saved_regs, regnum);
2791 /* An instruction to match. */
2794 unsigned int data; /* See if it matches this.... */
2795 unsigned int mask; /* ... with this mask. */
2798 /* See bfd/elf32-hppa.c */
2799 static struct insn_pattern hppa_long_branch_stub[] = {
2800 /* ldil LR'xxx,%r1 */
2801 { 0x20200000, 0xffe00000 },
2802 /* be,n RR'xxx(%sr4,%r1) */
2803 { 0xe0202002, 0xffe02002 },
2807 static struct insn_pattern hppa_long_branch_pic_stub[] = {
2809 { 0xe8200000, 0xffe00000 },
2810 /* addil LR'xxx - ($PIC_pcrel$0 - 4), %r1 */
2811 { 0x28200000, 0xffe00000 },
2812 /* be,n RR'xxxx - ($PIC_pcrel$0 - 8)(%sr4, %r1) */
2813 { 0xe0202002, 0xffe02002 },
2817 static struct insn_pattern hppa_import_stub[] = {
2818 /* addil LR'xxx, %dp */
2819 { 0x2b600000, 0xffe00000 },
2820 /* ldw RR'xxx(%r1), %r21 */
2821 { 0x48350000, 0xffffb000 },
2823 { 0xeaa0c000, 0xffffffff },
2824 /* ldw RR'xxx+4(%r1), %r19 */
2825 { 0x48330000, 0xffffb000 },
2829 static struct insn_pattern hppa_import_pic_stub[] = {
2830 /* addil LR'xxx,%r19 */
2831 { 0x2a600000, 0xffe00000 },
2832 /* ldw RR'xxx(%r1),%r21 */
2833 { 0x48350000, 0xffffb000 },
2835 { 0xeaa0c000, 0xffffffff },
2836 /* ldw RR'xxx+4(%r1),%r19 */
2837 { 0x48330000, 0xffffb000 },
2841 static struct insn_pattern hppa_plt_stub[] = {
2842 /* b,l 1b, %r20 - 1b is 3 insns before here */
2843 { 0xea9f1fdd, 0xffffffff },
2844 /* depi 0,31,2,%r20 */
2845 { 0xd6801c1e, 0xffffffff },
2849 /* Maximum number of instructions on the patterns above. */
2850 #define HPPA_MAX_INSN_PATTERN_LEN 4
2852 /* Return non-zero if the instructions at PC match the series
2853 described in PATTERN, or zero otherwise. PATTERN is an array of
2854 'struct insn_pattern' objects, terminated by an entry whose mask is
2857 When the match is successful, fill INSN[i] with what PATTERN[i]
2861 hppa_match_insns (struct gdbarch *gdbarch, CORE_ADDR pc,
2862 struct insn_pattern *pattern, unsigned int *insn)
2864 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2868 for (i = 0; pattern[i].mask; i++)
2870 gdb_byte buf[HPPA_INSN_SIZE];
2872 target_read_memory (npc, buf, HPPA_INSN_SIZE);
2873 insn[i] = extract_unsigned_integer (buf, HPPA_INSN_SIZE, byte_order);
2874 if ((insn[i] & pattern[i].mask) == pattern[i].data)
2883 /* This relaxed version of the insstruction matcher allows us to match
2884 from somewhere inside the pattern, by looking backwards in the
2885 instruction scheme. */
2888 hppa_match_insns_relaxed (struct gdbarch *gdbarch, CORE_ADDR pc,
2889 struct insn_pattern *pattern, unsigned int *insn)
2891 int offset, len = 0;
2893 while (pattern[len].mask)
2896 for (offset = 0; offset < len; offset++)
2897 if (hppa_match_insns (gdbarch, pc - offset * HPPA_INSN_SIZE,
2905 hppa_in_dyncall (CORE_ADDR pc)
2907 struct unwind_table_entry *u;
2909 u = find_unwind_entry (hppa_symbol_address ("$$dyncall"));
2913 return (pc >= u->region_start && pc <= u->region_end);
2917 hppa_in_solib_call_trampoline (struct gdbarch *gdbarch, CORE_ADDR pc)
2919 unsigned int insn[HPPA_MAX_INSN_PATTERN_LEN];
2920 struct unwind_table_entry *u;
2922 if (in_plt_section (pc) || hppa_in_dyncall (pc))
2925 /* The GNU toolchain produces linker stubs without unwind
2926 information. Since the pattern matching for linker stubs can be
2927 quite slow, so bail out if we do have an unwind entry. */
2929 u = find_unwind_entry (pc);
2934 (hppa_match_insns_relaxed (gdbarch, pc, hppa_import_stub, insn)
2935 || hppa_match_insns_relaxed (gdbarch, pc, hppa_import_pic_stub, insn)
2936 || hppa_match_insns_relaxed (gdbarch, pc, hppa_long_branch_stub, insn)
2937 || hppa_match_insns_relaxed (gdbarch, pc,
2938 hppa_long_branch_pic_stub, insn));
2941 /* This code skips several kind of "trampolines" used on PA-RISC
2942 systems: $$dyncall, import stubs and PLT stubs. */
2945 hppa_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
2947 struct gdbarch *gdbarch = get_frame_arch (frame);
2948 struct type *func_ptr_type = builtin_type (gdbarch)->builtin_func_ptr;
2950 unsigned int insn[HPPA_MAX_INSN_PATTERN_LEN];
2953 /* $$dyncall handles both PLABELs and direct addresses. */
2954 if (hppa_in_dyncall (pc))
2956 pc = get_frame_register_unsigned (frame, HPPA_R0_REGNUM + 22);
2958 /* PLABELs have bit 30 set; if it's a PLABEL, then dereference it. */
2960 pc = read_memory_typed_address (pc & ~0x3, func_ptr_type);
2965 dp_rel = hppa_match_insns (gdbarch, pc, hppa_import_stub, insn);
2966 if (dp_rel || hppa_match_insns (gdbarch, pc, hppa_import_pic_stub, insn))
2968 /* Extract the target address from the addil/ldw sequence. */
2969 pc = hppa_extract_21 (insn[0]) + hppa_extract_14 (insn[1]);
2972 pc += get_frame_register_unsigned (frame, HPPA_DP_REGNUM);
2974 pc += get_frame_register_unsigned (frame, HPPA_R0_REGNUM + 19);
2979 if (in_plt_section (pc))
2981 pc = read_memory_typed_address (pc, func_ptr_type);
2983 /* If the PLT slot has not yet been resolved, the target will be
2985 if (in_plt_section (pc))
2987 /* Sanity check: are we pointing to the PLT stub? */
2988 if (!hppa_match_insns (gdbarch, pc, hppa_plt_stub, insn))
2990 warning (_("Cannot resolve PLT stub at %s."),
2991 paddress (gdbarch, pc));
2995 /* This should point to the fixup routine. */
2996 pc = read_memory_typed_address (pc + 8, func_ptr_type);
3004 /* Here is a table of C type sizes on hppa with various compiles
3005 and options. I measured this on PA 9000/800 with HP-UX 11.11
3006 and these compilers:
3008 /usr/ccs/bin/cc HP92453-01 A.11.01.21
3009 /opt/ansic/bin/cc HP92453-01 B.11.11.28706.GP
3010 /opt/aCC/bin/aCC B3910B A.03.45
3011 gcc gcc 3.3.2 native hppa2.0w-hp-hpux11.11
3013 cc : 1 2 4 4 8 : 4 8 -- : 4 4
3014 ansic +DA1.1 : 1 2 4 4 8 : 4 8 16 : 4 4
3015 ansic +DA2.0 : 1 2 4 4 8 : 4 8 16 : 4 4
3016 ansic +DA2.0W : 1 2 4 8 8 : 4 8 16 : 8 8
3017 acc +DA1.1 : 1 2 4 4 8 : 4 8 16 : 4 4
3018 acc +DA2.0 : 1 2 4 4 8 : 4 8 16 : 4 4
3019 acc +DA2.0W : 1 2 4 8 8 : 4 8 16 : 8 8
3020 gcc : 1 2 4 4 8 : 4 8 16 : 4 4
3024 compiler and options
3025 char, short, int, long, long long
3026 float, double, long double
3029 So all these compilers use either ILP32 or LP64 model.
3030 TODO: gcc has more options so it needs more investigation.
3032 For floating point types, see:
3034 http://docs.hp.com/hpux/pdf/B3906-90006.pdf
3035 HP-UX floating-point guide, hpux 11.00
3037 -- chastain 2003-12-18 */
3039 static struct gdbarch *
3040 hppa_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
3042 struct gdbarch_tdep *tdep;
3043 struct gdbarch *gdbarch;
3045 /* find a candidate among the list of pre-declared architectures. */
3046 arches = gdbarch_list_lookup_by_info (arches, &info);
3048 return (arches->gdbarch);
3050 /* If none found, then allocate and initialize one. */
3051 tdep = XCNEW (struct gdbarch_tdep);
3052 gdbarch = gdbarch_alloc (&info, tdep);
3054 /* Determine from the bfd_arch_info structure if we are dealing with
3055 a 32 or 64 bits architecture. If the bfd_arch_info is not available,
3056 then default to a 32bit machine. */
3057 if (info.bfd_arch_info != NULL)
3058 tdep->bytes_per_address =
3059 info.bfd_arch_info->bits_per_address / info.bfd_arch_info->bits_per_byte;
3061 tdep->bytes_per_address = 4;
3063 tdep->find_global_pointer = hppa_find_global_pointer;
3065 /* Some parts of the gdbarch vector depend on whether we are running
3066 on a 32 bits or 64 bits target. */
3067 switch (tdep->bytes_per_address)
3070 set_gdbarch_num_regs (gdbarch, hppa32_num_regs);
3071 set_gdbarch_register_name (gdbarch, hppa32_register_name);
3072 set_gdbarch_register_type (gdbarch, hppa32_register_type);
3073 set_gdbarch_cannot_store_register (gdbarch,
3074 hppa32_cannot_store_register);
3075 set_gdbarch_cannot_fetch_register (gdbarch,
3076 hppa32_cannot_fetch_register);
3079 set_gdbarch_num_regs (gdbarch, hppa64_num_regs);
3080 set_gdbarch_register_name (gdbarch, hppa64_register_name);
3081 set_gdbarch_register_type (gdbarch, hppa64_register_type);
3082 set_gdbarch_dwarf2_reg_to_regnum (gdbarch, hppa64_dwarf_reg_to_regnum);
3083 set_gdbarch_cannot_store_register (gdbarch,
3084 hppa64_cannot_store_register);
3085 set_gdbarch_cannot_fetch_register (gdbarch,
3086 hppa64_cannot_fetch_register);
3089 internal_error (__FILE__, __LINE__, _("Unsupported address size: %d"),
3090 tdep->bytes_per_address);
3093 set_gdbarch_long_bit (gdbarch, tdep->bytes_per_address * TARGET_CHAR_BIT);
3094 set_gdbarch_ptr_bit (gdbarch, tdep->bytes_per_address * TARGET_CHAR_BIT);
3096 /* The following gdbarch vector elements are the same in both ILP32
3097 and LP64, but might show differences some day. */
3098 set_gdbarch_long_long_bit (gdbarch, 64);
3099 set_gdbarch_long_double_bit (gdbarch, 128);
3100 set_gdbarch_long_double_format (gdbarch, floatformats_ia64_quad);
3102 /* The following gdbarch vector elements do not depend on the address
3103 size, or in any other gdbarch element previously set. */
3104 set_gdbarch_skip_prologue (gdbarch, hppa_skip_prologue);
3105 set_gdbarch_stack_frame_destroyed_p (gdbarch,
3106 hppa_stack_frame_destroyed_p);
3107 set_gdbarch_inner_than (gdbarch, core_addr_greaterthan);
3108 set_gdbarch_sp_regnum (gdbarch, HPPA_SP_REGNUM);
3109 set_gdbarch_fp0_regnum (gdbarch, HPPA_FP0_REGNUM);
3110 set_gdbarch_addr_bits_remove (gdbarch, hppa_addr_bits_remove);
3111 set_gdbarch_believe_pcc_promotion (gdbarch, 1);
3112 set_gdbarch_read_pc (gdbarch, hppa_read_pc);
3113 set_gdbarch_write_pc (gdbarch, hppa_write_pc);
3115 /* Helper for function argument information. */
3116 set_gdbarch_fetch_pointer_argument (gdbarch, hppa_fetch_pointer_argument);
3118 /* When a hardware watchpoint triggers, we'll move the inferior past
3119 it by removing all eventpoints; stepping past the instruction
3120 that caused the trigger; reinserting eventpoints; and checking
3121 whether any watched location changed. */
3122 set_gdbarch_have_nonsteppable_watchpoint (gdbarch, 1);
3124 /* Inferior function call methods. */
3125 switch (tdep->bytes_per_address)
3128 set_gdbarch_push_dummy_call (gdbarch, hppa32_push_dummy_call);
3129 set_gdbarch_frame_align (gdbarch, hppa32_frame_align);
3130 set_gdbarch_convert_from_func_ptr_addr
3131 (gdbarch, hppa32_convert_from_func_ptr_addr);
3134 set_gdbarch_push_dummy_call (gdbarch, hppa64_push_dummy_call);
3135 set_gdbarch_frame_align (gdbarch, hppa64_frame_align);
3138 internal_error (__FILE__, __LINE__, _("bad switch"));
3141 /* Struct return methods. */
3142 switch (tdep->bytes_per_address)
3145 set_gdbarch_return_value (gdbarch, hppa32_return_value);
3148 set_gdbarch_return_value (gdbarch, hppa64_return_value);
3151 internal_error (__FILE__, __LINE__, _("bad switch"));
3154 set_gdbarch_breakpoint_kind_from_pc (gdbarch, hppa_breakpoint::kind_from_pc);
3155 set_gdbarch_sw_breakpoint_from_kind (gdbarch, hppa_breakpoint::bp_from_kind);
3156 set_gdbarch_pseudo_register_read (gdbarch, hppa_pseudo_register_read);
3158 /* Frame unwind methods. */
3159 set_gdbarch_dummy_id (gdbarch, hppa_dummy_id);
3160 set_gdbarch_unwind_pc (gdbarch, hppa_unwind_pc);
3162 /* Hook in ABI-specific overrides, if they have been registered. */
3163 gdbarch_init_osabi (info, gdbarch);
3165 /* Hook in the default unwinders. */
3166 frame_unwind_append_unwinder (gdbarch, &hppa_stub_frame_unwind);
3167 frame_unwind_append_unwinder (gdbarch, &hppa_frame_unwind);
3168 frame_unwind_append_unwinder (gdbarch, &hppa_fallback_frame_unwind);
3174 hppa_dump_tdep (struct gdbarch *gdbarch, struct ui_file *file)
3176 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
3178 fprintf_unfiltered (file, "bytes_per_address = %d\n",
3179 tdep->bytes_per_address);
3180 fprintf_unfiltered (file, "elf = %s\n", tdep->is_elf ? "yes" : "no");
3184 _initialize_hppa_tdep (void)
3186 gdbarch_register (bfd_arch_hppa, hppa_gdbarch_init, hppa_dump_tdep);
3188 hppa_objfile_priv_data = register_objfile_data ();
3190 add_cmd ("unwind", class_maintenance, unwind_command,
3191 _("Print unwind table entry at given address."),
3192 &maintenanceprintlist);
3194 /* Debug this files internals. */
3195 add_setshow_boolean_cmd ("hppa", class_maintenance, &hppa_debug, _("\
3196 Set whether hppa target specific debugging information should be displayed."),
3198 Show whether hppa target specific debugging information is displayed."), _("\
3199 This flag controls whether hppa target specific debugging information is\n\
3200 displayed. This information is particularly useful for debugging frame\n\
3201 unwinding problems."),
3203 NULL, /* FIXME: i18n: hppa debug flag is %s. */
3204 &setdebuglist, &showdebuglist);