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Commit | Line | Data |
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a7aad9aa | 1 | /* Target-dependent code for the HP PA-RISC architecture. |
cda5a58a | 2 | |
4a94e368 | 3 | Copyright (C) 1986-2022 Free Software Foundation, Inc. |
c906108c SS |
4 | |
5 | Contributed by the Center for Software Science at the | |
6 | University of Utah (pa-gdb-bugs@cs.utah.edu). | |
7 | ||
c5aa993b | 8 | This file is part of GDB. |
c906108c | 9 | |
c5aa993b JM |
10 | This program is free software; you can redistribute it and/or modify |
11 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 12 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 13 | (at your option) any later version. |
c906108c | 14 | |
c5aa993b JM |
15 | This program is distributed in the hope that it will be useful, |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
c906108c | 19 | |
c5aa993b | 20 | You should have received a copy of the GNU General Public License |
a9762ec7 | 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
22 | |
23 | #include "defs.h" | |
c906108c SS |
24 | #include "bfd.h" |
25 | #include "inferior.h" | |
4e052eda | 26 | #include "regcache.h" |
e5d66720 | 27 | #include "completer.h" |
59623e27 | 28 | #include "osabi.h" |
343af405 | 29 | #include "arch-utils.h" |
1777feb0 | 30 | /* For argument passing to the inferior. */ |
c906108c | 31 | #include "symtab.h" |
fde2cceb | 32 | #include "dis-asm.h" |
26d08f08 AC |
33 | #include "trad-frame.h" |
34 | #include "frame-unwind.h" | |
35 | #include "frame-base.h" | |
c906108c | 36 | |
c906108c SS |
37 | #include "gdbcore.h" |
38 | #include "gdbcmd.h" | |
e6bb342a | 39 | #include "gdbtypes.h" |
c906108c | 40 | #include "objfiles.h" |
3ff7cf9e | 41 | #include "hppa-tdep.h" |
325fac50 | 42 | #include <algorithm> |
c906108c | 43 | |
491144b5 | 44 | static bool hppa_debug = false; |
369aa520 | 45 | |
60383d10 | 46 | /* Some local constants. */ |
3ff7cf9e JB |
47 | static const int hppa32_num_regs = 128; |
48 | static const int hppa64_num_regs = 96; | |
49 | ||
61a12cfa JK |
50 | /* We use the objfile->obj_private pointer for two things: |
51 | * 1. An unwind table; | |
52 | * | |
53 | * 2. A pointer to any associated shared library object. | |
54 | * | |
55 | * #defines are used to help refer to these objects. | |
56 | */ | |
57 | ||
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. | |
63 | */ | |
64 | struct hppa_unwind_info | |
65 | { | |
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 */ | |
69 | }; | |
70 | ||
71 | struct hppa_objfile_private | |
72 | { | |
abed5aa8 TT |
73 | struct hppa_unwind_info *unwind_info = nullptr; /* a pointer */ |
74 | struct so_list *so_info = nullptr; /* a pointer */ | |
75 | CORE_ADDR dp = 0; | |
61a12cfa | 76 | |
abed5aa8 TT |
77 | int dummy_call_sequence_reg = 0; |
78 | CORE_ADDR dummy_call_sequence_addr = 0; | |
61a12cfa JK |
79 | }; |
80 | ||
7c46b9fb RC |
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. */ | |
abed5aa8 | 87 | static const struct objfile_key<hppa_objfile_private> hppa_objfile_priv_data; |
7c46b9fb | 88 | |
405feb71 | 89 | /* Get at various relevant fields of an instruction word. */ |
e2ac8128 JB |
90 | #define MASK_5 0x1f |
91 | #define MASK_11 0x7ff | |
92 | #define MASK_14 0x3fff | |
93 | #define MASK_21 0x1fffff | |
94 | ||
e2ac8128 JB |
95 | /* Sizes (in bytes) of the native unwind entries. */ |
96 | #define UNWIND_ENTRY_SIZE 16 | |
97 | #define STUB_UNWIND_ENTRY_SIZE 8 | |
98 | ||
c906108c | 99 | /* Routines to extract various sized constants out of hppa |
1777feb0 | 100 | instructions. */ |
c906108c SS |
101 | |
102 | /* This assumes that no garbage lies outside of the lower bits of | |
1777feb0 | 103 | value. */ |
c906108c | 104 | |
63807e1d | 105 | static int |
abc485a1 | 106 | hppa_sign_extend (unsigned val, unsigned bits) |
c906108c | 107 | { |
66c6502d | 108 | return (int) (val >> (bits - 1) ? (-(1 << bits)) | val : val); |
c906108c SS |
109 | } |
110 | ||
1777feb0 | 111 | /* For many immediate values the sign bit is the low bit! */ |
c906108c | 112 | |
63807e1d | 113 | static int |
abc485a1 | 114 | hppa_low_hppa_sign_extend (unsigned val, unsigned bits) |
c906108c | 115 | { |
66c6502d | 116 | return (int) ((val & 0x1 ? (-(1 << (bits - 1))) : 0) | val >> 1); |
c906108c SS |
117 | } |
118 | ||
e2ac8128 | 119 | /* Extract the bits at positions between FROM and TO, using HP's numbering |
1777feb0 | 120 | (MSB = 0). */ |
e2ac8128 | 121 | |
abc485a1 RC |
122 | int |
123 | hppa_get_field (unsigned word, int from, int to) | |
e2ac8128 JB |
124 | { |
125 | return ((word) >> (31 - (to)) & ((1 << ((to) - (from) + 1)) - 1)); | |
126 | } | |
127 | ||
1777feb0 | 128 | /* Extract the immediate field from a ld{bhw}s instruction. */ |
c906108c | 129 | |
abc485a1 RC |
130 | int |
131 | hppa_extract_5_load (unsigned word) | |
c906108c | 132 | { |
abc485a1 | 133 | return hppa_low_hppa_sign_extend (word >> 16 & MASK_5, 5); |
c906108c SS |
134 | } |
135 | ||
1777feb0 | 136 | /* Extract the immediate field from a break instruction. */ |
c906108c | 137 | |
abc485a1 RC |
138 | unsigned |
139 | hppa_extract_5r_store (unsigned word) | |
c906108c SS |
140 | { |
141 | return (word & MASK_5); | |
142 | } | |
143 | ||
1777feb0 | 144 | /* Extract the immediate field from a {sr}sm instruction. */ |
c906108c | 145 | |
abc485a1 RC |
146 | unsigned |
147 | hppa_extract_5R_store (unsigned word) | |
c906108c SS |
148 | { |
149 | return (word >> 16 & MASK_5); | |
150 | } | |
151 | ||
1777feb0 | 152 | /* Extract a 14 bit immediate field. */ |
c906108c | 153 | |
abc485a1 RC |
154 | int |
155 | hppa_extract_14 (unsigned word) | |
c906108c | 156 | { |
abc485a1 | 157 | return hppa_low_hppa_sign_extend (word & MASK_14, 14); |
c906108c SS |
158 | } |
159 | ||
1777feb0 | 160 | /* Extract a 21 bit constant. */ |
c906108c | 161 | |
abc485a1 RC |
162 | int |
163 | hppa_extract_21 (unsigned word) | |
c906108c SS |
164 | { |
165 | int val; | |
166 | ||
167 | word &= MASK_21; | |
168 | word <<= 11; | |
abc485a1 | 169 | val = hppa_get_field (word, 20, 20); |
c906108c | 170 | val <<= 11; |
abc485a1 | 171 | val |= hppa_get_field (word, 9, 19); |
c906108c | 172 | val <<= 2; |
abc485a1 | 173 | val |= hppa_get_field (word, 5, 6); |
c906108c | 174 | val <<= 5; |
abc485a1 | 175 | val |= hppa_get_field (word, 0, 4); |
c906108c | 176 | val <<= 2; |
abc485a1 RC |
177 | val |= hppa_get_field (word, 7, 8); |
178 | return hppa_sign_extend (val, 21) << 11; | |
c906108c SS |
179 | } |
180 | ||
c906108c | 181 | /* extract a 17 bit constant from branch instructions, returning the |
1777feb0 | 182 | 19 bit signed value. */ |
c906108c | 183 | |
abc485a1 RC |
184 | int |
185 | hppa_extract_17 (unsigned word) | |
c906108c | 186 | { |
abc485a1 RC |
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 | | |
c906108c SS |
190 | (word & 0x1) << 16, 17) << 2; |
191 | } | |
3388d7ff RC |
192 | |
193 | CORE_ADDR | |
194 | hppa_symbol_address(const char *sym) | |
195 | { | |
3b7344d5 | 196 | struct bound_minimal_symbol minsym; |
3388d7ff RC |
197 | |
198 | minsym = lookup_minimal_symbol (sym, NULL, NULL); | |
3b7344d5 | 199 | if (minsym.minsym) |
77e371c0 | 200 | return BMSYMBOL_VALUE_ADDRESS (minsym); |
3388d7ff RC |
201 | else |
202 | return (CORE_ADDR)-1; | |
203 | } | |
77d18ded | 204 | |
c906108c SS |
205 | \f |
206 | ||
207 | /* Compare the start address for two unwind entries returning 1 if | |
208 | the first address is larger than the second, -1 if the second is | |
209 | larger than the first, and zero if they are equal. */ | |
210 | ||
211 | static int | |
fba45db2 | 212 | compare_unwind_entries (const void *arg1, const void *arg2) |
c906108c | 213 | { |
9a3c8263 SM |
214 | const struct unwind_table_entry *a = (const struct unwind_table_entry *) arg1; |
215 | const struct unwind_table_entry *b = (const struct unwind_table_entry *) arg2; | |
c906108c SS |
216 | |
217 | if (a->region_start > b->region_start) | |
218 | return 1; | |
219 | else if (a->region_start < b->region_start) | |
220 | return -1; | |
221 | else | |
222 | return 0; | |
223 | } | |
224 | ||
53a5351d | 225 | static void |
fdd72f95 | 226 | record_text_segment_lowaddr (bfd *abfd, asection *section, void *data) |
53a5351d | 227 | { |
fdd72f95 | 228 | if ((section->flags & (SEC_ALLOC | SEC_LOAD | SEC_READONLY)) |
53a5351d | 229 | == (SEC_ALLOC | SEC_LOAD | SEC_READONLY)) |
fdd72f95 RC |
230 | { |
231 | bfd_vma value = section->vma - section->filepos; | |
232 | CORE_ADDR *low_text_segment_address = (CORE_ADDR *)data; | |
233 | ||
234 | if (value < *low_text_segment_address) | |
dda83cd7 | 235 | *low_text_segment_address = value; |
fdd72f95 | 236 | } |
53a5351d JM |
237 | } |
238 | ||
c906108c | 239 | static void |
fba45db2 | 240 | internalize_unwinds (struct objfile *objfile, struct unwind_table_entry *table, |
1777feb0 | 241 | asection *section, unsigned int entries, |
241fd515 | 242 | size_t size, CORE_ADDR text_offset) |
c906108c SS |
243 | { |
244 | /* We will read the unwind entries into temporary memory, then | |
245 | fill in the actual unwind table. */ | |
fdd72f95 | 246 | |
c906108c SS |
247 | if (size > 0) |
248 | { | |
08feed99 | 249 | struct gdbarch *gdbarch = objfile->arch (); |
345bd07c | 250 | hppa_gdbarch_tdep *tdep = (hppa_gdbarch_tdep *) gdbarch_tdep (gdbarch); |
c906108c SS |
251 | unsigned long tmp; |
252 | unsigned i; | |
224c3ddb | 253 | char *buf = (char *) alloca (size); |
fdd72f95 | 254 | CORE_ADDR low_text_segment_address; |
c906108c | 255 | |
fdd72f95 | 256 | /* For ELF targets, then unwinds are supposed to |
1777feb0 | 257 | be segment relative offsets instead of absolute addresses. |
c2c6d25f JM |
258 | |
259 | Note that when loading a shared library (text_offset != 0) the | |
260 | unwinds are already relative to the text_offset that will be | |
261 | passed in. */ | |
345bd07c | 262 | if (tdep->is_elf && text_offset == 0) |
53a5351d | 263 | { |
dda83cd7 | 264 | low_text_segment_address = -1; |
fdd72f95 | 265 | |
53a5351d | 266 | bfd_map_over_sections (objfile->obfd, |
fdd72f95 RC |
267 | record_text_segment_lowaddr, |
268 | &low_text_segment_address); | |
53a5351d | 269 | |
fdd72f95 | 270 | text_offset = low_text_segment_address; |
53a5351d | 271 | } |
345bd07c | 272 | else if (tdep->solib_get_text_base) |
dda83cd7 | 273 | { |
345bd07c | 274 | text_offset = tdep->solib_get_text_base (objfile); |
acf86d54 | 275 | } |
53a5351d | 276 | |
c906108c SS |
277 | bfd_get_section_contents (objfile->obfd, section, buf, 0, size); |
278 | ||
279 | /* Now internalize the information being careful to handle host/target | |
dda83cd7 | 280 | endian issues. */ |
c906108c SS |
281 | for (i = 0; i < entries; i++) |
282 | { | |
283 | table[i].region_start = bfd_get_32 (objfile->obfd, | |
c5aa993b | 284 | (bfd_byte *) buf); |
c906108c SS |
285 | table[i].region_start += text_offset; |
286 | buf += 4; | |
c5aa993b | 287 | table[i].region_end = bfd_get_32 (objfile->obfd, (bfd_byte *) buf); |
c906108c SS |
288 | table[i].region_end += text_offset; |
289 | buf += 4; | |
c5aa993b | 290 | tmp = bfd_get_32 (objfile->obfd, (bfd_byte *) buf); |
c906108c SS |
291 | buf += 4; |
292 | table[i].Cannot_unwind = (tmp >> 31) & 0x1; | |
293 | table[i].Millicode = (tmp >> 30) & 0x1; | |
294 | table[i].Millicode_save_sr0 = (tmp >> 29) & 0x1; | |
295 | table[i].Region_description = (tmp >> 27) & 0x3; | |
6fcecea0 | 296 | table[i].reserved = (tmp >> 26) & 0x1; |
c906108c SS |
297 | table[i].Entry_SR = (tmp >> 25) & 0x1; |
298 | table[i].Entry_FR = (tmp >> 21) & 0xf; | |
299 | table[i].Entry_GR = (tmp >> 16) & 0x1f; | |
300 | table[i].Args_stored = (tmp >> 15) & 0x1; | |
301 | table[i].Variable_Frame = (tmp >> 14) & 0x1; | |
302 | table[i].Separate_Package_Body = (tmp >> 13) & 0x1; | |
303 | table[i].Frame_Extension_Millicode = (tmp >> 12) & 0x1; | |
304 | table[i].Stack_Overflow_Check = (tmp >> 11) & 0x1; | |
305 | table[i].Two_Instruction_SP_Increment = (tmp >> 10) & 0x1; | |
6fcecea0 | 306 | table[i].sr4export = (tmp >> 9) & 0x1; |
c906108c SS |
307 | table[i].cxx_info = (tmp >> 8) & 0x1; |
308 | table[i].cxx_try_catch = (tmp >> 7) & 0x1; | |
309 | table[i].sched_entry_seq = (tmp >> 6) & 0x1; | |
6fcecea0 | 310 | table[i].reserved1 = (tmp >> 5) & 0x1; |
c906108c SS |
311 | table[i].Save_SP = (tmp >> 4) & 0x1; |
312 | table[i].Save_RP = (tmp >> 3) & 0x1; | |
313 | table[i].Save_MRP_in_frame = (tmp >> 2) & 0x1; | |
6fcecea0 | 314 | table[i].save_r19 = (tmp >> 1) & 0x1; |
c906108c | 315 | table[i].Cleanup_defined = tmp & 0x1; |
c5aa993b | 316 | tmp = bfd_get_32 (objfile->obfd, (bfd_byte *) buf); |
c906108c SS |
317 | buf += 4; |
318 | table[i].MPE_XL_interrupt_marker = (tmp >> 31) & 0x1; | |
319 | table[i].HP_UX_interrupt_marker = (tmp >> 30) & 0x1; | |
320 | table[i].Large_frame = (tmp >> 29) & 0x1; | |
6fcecea0 RC |
321 | table[i].alloca_frame = (tmp >> 28) & 0x1; |
322 | table[i].reserved2 = (tmp >> 27) & 0x1; | |
c906108c SS |
323 | table[i].Total_frame_size = tmp & 0x7ffffff; |
324 | ||
1777feb0 | 325 | /* Stub unwinds are handled elsewhere. */ |
c906108c SS |
326 | table[i].stub_unwind.stub_type = 0; |
327 | table[i].stub_unwind.padding = 0; | |
328 | } | |
329 | } | |
330 | } | |
331 | ||
332 | /* Read in the backtrace information stored in the `$UNWIND_START$' section of | |
333 | the object file. This info is used mainly by find_unwind_entry() to find | |
334 | out the stack frame size and frame pointer used by procedures. We put | |
335 | everything on the psymbol obstack in the objfile so that it automatically | |
336 | gets freed when the objfile is destroyed. */ | |
337 | ||
338 | static void | |
fba45db2 | 339 | read_unwind_info (struct objfile *objfile) |
c906108c | 340 | { |
d4f3574e | 341 | asection *unwind_sec, *stub_unwind_sec; |
241fd515 | 342 | size_t unwind_size, stub_unwind_size, total_size; |
d4f3574e | 343 | unsigned index, unwind_entries; |
c906108c SS |
344 | unsigned stub_entries, total_entries; |
345 | CORE_ADDR text_offset; | |
7c46b9fb RC |
346 | struct hppa_unwind_info *ui; |
347 | struct hppa_objfile_private *obj_private; | |
c906108c | 348 | |
b3b3bada | 349 | text_offset = objfile->text_section_offset (); |
7c46b9fb RC |
350 | ui = (struct hppa_unwind_info *) obstack_alloc (&objfile->objfile_obstack, |
351 | sizeof (struct hppa_unwind_info)); | |
c906108c SS |
352 | |
353 | ui->table = NULL; | |
354 | ui->cache = NULL; | |
355 | ui->last = -1; | |
356 | ||
d4f3574e SS |
357 | /* For reasons unknown the HP PA64 tools generate multiple unwinder |
358 | sections in a single executable. So we just iterate over every | |
85102364 | 359 | section in the BFD looking for unwinder sections instead of trying |
1777feb0 | 360 | to do a lookup with bfd_get_section_by_name. |
c906108c | 361 | |
d4f3574e SS |
362 | First determine the total size of the unwind tables so that we |
363 | can allocate memory in a nice big hunk. */ | |
364 | total_entries = 0; | |
365 | for (unwind_sec = objfile->obfd->sections; | |
366 | unwind_sec; | |
367 | unwind_sec = unwind_sec->next) | |
c906108c | 368 | { |
d4f3574e SS |
369 | if (strcmp (unwind_sec->name, "$UNWIND_START$") == 0 |
370 | || strcmp (unwind_sec->name, ".PARISC.unwind") == 0) | |
371 | { | |
fd361982 | 372 | unwind_size = bfd_section_size (unwind_sec); |
d4f3574e | 373 | unwind_entries = unwind_size / UNWIND_ENTRY_SIZE; |
c906108c | 374 | |
d4f3574e SS |
375 | total_entries += unwind_entries; |
376 | } | |
c906108c SS |
377 | } |
378 | ||
d4f3574e | 379 | /* Now compute the size of the stub unwinds. Note the ELF tools do not |
043f5962 | 380 | use stub unwinds at the current time. */ |
d4f3574e SS |
381 | stub_unwind_sec = bfd_get_section_by_name (objfile->obfd, "$UNWIND_END$"); |
382 | ||
c906108c SS |
383 | if (stub_unwind_sec) |
384 | { | |
fd361982 | 385 | stub_unwind_size = bfd_section_size (stub_unwind_sec); |
c906108c SS |
386 | stub_entries = stub_unwind_size / STUB_UNWIND_ENTRY_SIZE; |
387 | } | |
388 | else | |
389 | { | |
390 | stub_unwind_size = 0; | |
391 | stub_entries = 0; | |
392 | } | |
393 | ||
394 | /* Compute total number of unwind entries and their total size. */ | |
d4f3574e | 395 | total_entries += stub_entries; |
c906108c SS |
396 | total_size = total_entries * sizeof (struct unwind_table_entry); |
397 | ||
398 | /* Allocate memory for the unwind table. */ | |
399 | ui->table = (struct unwind_table_entry *) | |
8b92e4d5 | 400 | obstack_alloc (&objfile->objfile_obstack, total_size); |
c5aa993b | 401 | ui->last = total_entries - 1; |
c906108c | 402 | |
d4f3574e SS |
403 | /* Now read in each unwind section and internalize the standard unwind |
404 | entries. */ | |
c906108c | 405 | index = 0; |
d4f3574e SS |
406 | for (unwind_sec = objfile->obfd->sections; |
407 | unwind_sec; | |
408 | unwind_sec = unwind_sec->next) | |
409 | { | |
410 | if (strcmp (unwind_sec->name, "$UNWIND_START$") == 0 | |
411 | || strcmp (unwind_sec->name, ".PARISC.unwind") == 0) | |
412 | { | |
fd361982 | 413 | unwind_size = bfd_section_size (unwind_sec); |
d4f3574e SS |
414 | unwind_entries = unwind_size / UNWIND_ENTRY_SIZE; |
415 | ||
416 | internalize_unwinds (objfile, &ui->table[index], unwind_sec, | |
417 | unwind_entries, unwind_size, text_offset); | |
418 | index += unwind_entries; | |
419 | } | |
420 | } | |
421 | ||
422 | /* Now read in and internalize the stub unwind entries. */ | |
c906108c SS |
423 | if (stub_unwind_size > 0) |
424 | { | |
425 | unsigned int i; | |
224c3ddb | 426 | char *buf = (char *) alloca (stub_unwind_size); |
c906108c SS |
427 | |
428 | /* Read in the stub unwind entries. */ | |
429 | bfd_get_section_contents (objfile->obfd, stub_unwind_sec, buf, | |
430 | 0, stub_unwind_size); | |
431 | ||
432 | /* Now convert them into regular unwind entries. */ | |
433 | for (i = 0; i < stub_entries; i++, index++) | |
434 | { | |
435 | /* Clear out the next unwind entry. */ | |
436 | memset (&ui->table[index], 0, sizeof (struct unwind_table_entry)); | |
437 | ||
1777feb0 | 438 | /* Convert offset & size into region_start and region_end. |
c906108c SS |
439 | Stuff away the stub type into "reserved" fields. */ |
440 | ui->table[index].region_start = bfd_get_32 (objfile->obfd, | |
441 | (bfd_byte *) buf); | |
442 | ui->table[index].region_start += text_offset; | |
443 | buf += 4; | |
444 | ui->table[index].stub_unwind.stub_type = bfd_get_8 (objfile->obfd, | |
c5aa993b | 445 | (bfd_byte *) buf); |
c906108c SS |
446 | buf += 2; |
447 | ui->table[index].region_end | |
c5aa993b JM |
448 | = ui->table[index].region_start + 4 * |
449 | (bfd_get_16 (objfile->obfd, (bfd_byte *) buf) - 1); | |
c906108c SS |
450 | buf += 2; |
451 | } | |
452 | ||
453 | } | |
454 | ||
455 | /* Unwind table needs to be kept sorted. */ | |
456 | qsort (ui->table, total_entries, sizeof (struct unwind_table_entry), | |
457 | compare_unwind_entries); | |
458 | ||
459 | /* Keep a pointer to the unwind information. */ | |
9a73f0ad | 460 | obj_private = hppa_objfile_priv_data.get (objfile); |
7c46b9fb | 461 | if (obj_private == NULL) |
abed5aa8 | 462 | obj_private = hppa_objfile_priv_data.emplace (objfile); |
77d18ded | 463 | |
c906108c SS |
464 | obj_private->unwind_info = ui; |
465 | } | |
466 | ||
467 | /* Lookup the unwind (stack backtrace) info for the given PC. We search all | |
468 | of the objfiles seeking the unwind table entry for this PC. Each objfile | |
469 | contains a sorted list of struct unwind_table_entry. Since we do a binary | |
470 | search of the unwind tables, we depend upon them to be sorted. */ | |
471 | ||
472 | struct unwind_table_entry * | |
fba45db2 | 473 | find_unwind_entry (CORE_ADDR pc) |
c906108c SS |
474 | { |
475 | int first, middle, last; | |
c906108c | 476 | |
369aa520 | 477 | if (hppa_debug) |
5af949e3 | 478 | fprintf_unfiltered (gdb_stdlog, "{ find_unwind_entry %s -> ", |
dda83cd7 | 479 | hex_string (pc)); |
369aa520 | 480 | |
1777feb0 | 481 | /* A function at address 0? Not in HP-UX! */ |
c906108c | 482 | if (pc == (CORE_ADDR) 0) |
369aa520 RC |
483 | { |
484 | if (hppa_debug) | |
485 | fprintf_unfiltered (gdb_stdlog, "NULL }\n"); | |
486 | return NULL; | |
487 | } | |
c906108c | 488 | |
2030c079 | 489 | for (objfile *objfile : current_program_space->objfiles ()) |
aed57c53 TT |
490 | { |
491 | struct hppa_unwind_info *ui; | |
492 | ui = NULL; | |
abed5aa8 | 493 | struct hppa_objfile_private *priv = hppa_objfile_priv_data.get (objfile); |
aed57c53 | 494 | if (priv) |
abed5aa8 | 495 | ui = priv->unwind_info; |
aed57c53 TT |
496 | |
497 | if (!ui) | |
498 | { | |
499 | read_unwind_info (objfile); | |
9a73f0ad | 500 | priv = hppa_objfile_priv_data.get (objfile); |
aed57c53 TT |
501 | if (priv == NULL) |
502 | error (_("Internal error reading unwind information.")); | |
abed5aa8 | 503 | ui = priv->unwind_info; |
aed57c53 TT |
504 | } |
505 | ||
506 | /* First, check the cache. */ | |
507 | ||
508 | if (ui->cache | |
509 | && pc >= ui->cache->region_start | |
510 | && pc <= ui->cache->region_end) | |
511 | { | |
512 | if (hppa_debug) | |
513 | fprintf_unfiltered (gdb_stdlog, "%s (cached) }\n", | |
514 | hex_string ((uintptr_t) ui->cache)); | |
515 | return ui->cache; | |
516 | } | |
517 | ||
518 | /* Not in the cache, do a binary search. */ | |
519 | ||
520 | first = 0; | |
521 | last = ui->last; | |
522 | ||
523 | while (first <= last) | |
524 | { | |
525 | middle = (first + last) / 2; | |
526 | if (pc >= ui->table[middle].region_start | |
527 | && pc <= ui->table[middle].region_end) | |
528 | { | |
529 | ui->cache = &ui->table[middle]; | |
530 | if (hppa_debug) | |
531 | fprintf_unfiltered (gdb_stdlog, "%s }\n", | |
532 | hex_string ((uintptr_t) ui->cache)); | |
533 | return &ui->table[middle]; | |
534 | } | |
535 | ||
536 | if (pc < ui->table[middle].region_start) | |
537 | last = middle - 1; | |
538 | else | |
539 | first = middle + 1; | |
540 | } | |
541 | } | |
369aa520 RC |
542 | |
543 | if (hppa_debug) | |
544 | fprintf_unfiltered (gdb_stdlog, "NULL (not found) }\n"); | |
545 | ||
c906108c SS |
546 | return NULL; |
547 | } | |
548 | ||
c9cf6e20 MG |
549 | /* Implement the stack_frame_destroyed_p gdbarch method. |
550 | ||
551 | The epilogue is defined here as the area either on the `bv' instruction | |
1777feb0 | 552 | itself or an instruction which destroys the function's stack frame. |
1fb24930 RC |
553 | |
554 | We do not assume that the epilogue is at the end of a function as we can | |
555 | also have return sequences in the middle of a function. */ | |
c9cf6e20 | 556 | |
1fb24930 | 557 | static int |
c9cf6e20 | 558 | hppa_stack_frame_destroyed_p (struct gdbarch *gdbarch, CORE_ADDR pc) |
1fb24930 | 559 | { |
e17a4113 | 560 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
1fb24930 RC |
561 | unsigned long status; |
562 | unsigned int inst; | |
e362b510 | 563 | gdb_byte buf[4]; |
1fb24930 | 564 | |
8defab1a | 565 | status = target_read_memory (pc, buf, 4); |
1fb24930 RC |
566 | if (status != 0) |
567 | return 0; | |
568 | ||
e17a4113 | 569 | inst = extract_unsigned_integer (buf, 4, byte_order); |
1fb24930 RC |
570 | |
571 | /* The most common way to perform a stack adjustment ldo X(sp),sp | |
572 | We are destroying a stack frame if the offset is negative. */ | |
573 | if ((inst & 0xffffc000) == 0x37de0000 | |
574 | && hppa_extract_14 (inst) < 0) | |
575 | return 1; | |
576 | ||
577 | /* ldw,mb D(sp),X or ldd,mb D(sp),X */ | |
578 | if (((inst & 0x0fc010e0) == 0x0fc010e0 | |
579 | || (inst & 0x0fc010e0) == 0x0fc010e0) | |
580 | && hppa_extract_14 (inst) < 0) | |
581 | return 1; | |
582 | ||
583 | /* bv %r0(%rp) or bv,n %r0(%rp) */ | |
584 | if (inst == 0xe840c000 || inst == 0xe840c002) | |
585 | return 1; | |
586 | ||
587 | return 0; | |
588 | } | |
589 | ||
04180708 | 590 | constexpr gdb_byte hppa_break_insn[] = {0x00, 0x01, 0x00, 0x04}; |
598cc9dc | 591 | |
04180708 | 592 | typedef BP_MANIPULATION (hppa_break_insn) hppa_breakpoint; |
aaab4dba | 593 | |
e23457df AC |
594 | /* Return the name of a register. */ |
595 | ||
4a302917 | 596 | static const char * |
d93859e2 | 597 | hppa32_register_name (struct gdbarch *gdbarch, int i) |
e23457df | 598 | { |
a121b7c1 | 599 | static const char *names[] = { |
e23457df AC |
600 | "flags", "r1", "rp", "r3", |
601 | "r4", "r5", "r6", "r7", | |
602 | "r8", "r9", "r10", "r11", | |
603 | "r12", "r13", "r14", "r15", | |
604 | "r16", "r17", "r18", "r19", | |
605 | "r20", "r21", "r22", "r23", | |
606 | "r24", "r25", "r26", "dp", | |
607 | "ret0", "ret1", "sp", "r31", | |
608 | "sar", "pcoqh", "pcsqh", "pcoqt", | |
609 | "pcsqt", "eiem", "iir", "isr", | |
610 | "ior", "ipsw", "goto", "sr4", | |
611 | "sr0", "sr1", "sr2", "sr3", | |
612 | "sr5", "sr6", "sr7", "cr0", | |
613 | "cr8", "cr9", "ccr", "cr12", | |
614 | "cr13", "cr24", "cr25", "cr26", | |
615 | "mpsfu_high","mpsfu_low","mpsfu_ovflo","pad", | |
616 | "fpsr", "fpe1", "fpe2", "fpe3", | |
617 | "fpe4", "fpe5", "fpe6", "fpe7", | |
618 | "fr4", "fr4R", "fr5", "fr5R", | |
619 | "fr6", "fr6R", "fr7", "fr7R", | |
620 | "fr8", "fr8R", "fr9", "fr9R", | |
621 | "fr10", "fr10R", "fr11", "fr11R", | |
622 | "fr12", "fr12R", "fr13", "fr13R", | |
623 | "fr14", "fr14R", "fr15", "fr15R", | |
624 | "fr16", "fr16R", "fr17", "fr17R", | |
625 | "fr18", "fr18R", "fr19", "fr19R", | |
626 | "fr20", "fr20R", "fr21", "fr21R", | |
627 | "fr22", "fr22R", "fr23", "fr23R", | |
628 | "fr24", "fr24R", "fr25", "fr25R", | |
629 | "fr26", "fr26R", "fr27", "fr27R", | |
630 | "fr28", "fr28R", "fr29", "fr29R", | |
631 | "fr30", "fr30R", "fr31", "fr31R" | |
632 | }; | |
633 | if (i < 0 || i >= (sizeof (names) / sizeof (*names))) | |
634 | return NULL; | |
635 | else | |
636 | return names[i]; | |
637 | } | |
638 | ||
4a302917 | 639 | static const char * |
d93859e2 | 640 | hppa64_register_name (struct gdbarch *gdbarch, int i) |
e23457df | 641 | { |
a121b7c1 | 642 | static const char *names[] = { |
e23457df AC |
643 | "flags", "r1", "rp", "r3", |
644 | "r4", "r5", "r6", "r7", | |
645 | "r8", "r9", "r10", "r11", | |
646 | "r12", "r13", "r14", "r15", | |
647 | "r16", "r17", "r18", "r19", | |
648 | "r20", "r21", "r22", "r23", | |
649 | "r24", "r25", "r26", "dp", | |
650 | "ret0", "ret1", "sp", "r31", | |
651 | "sar", "pcoqh", "pcsqh", "pcoqt", | |
652 | "pcsqt", "eiem", "iir", "isr", | |
653 | "ior", "ipsw", "goto", "sr4", | |
654 | "sr0", "sr1", "sr2", "sr3", | |
655 | "sr5", "sr6", "sr7", "cr0", | |
656 | "cr8", "cr9", "ccr", "cr12", | |
657 | "cr13", "cr24", "cr25", "cr26", | |
658 | "mpsfu_high","mpsfu_low","mpsfu_ovflo","pad", | |
659 | "fpsr", "fpe1", "fpe2", "fpe3", | |
660 | "fr4", "fr5", "fr6", "fr7", | |
661 | "fr8", "fr9", "fr10", "fr11", | |
662 | "fr12", "fr13", "fr14", "fr15", | |
663 | "fr16", "fr17", "fr18", "fr19", | |
664 | "fr20", "fr21", "fr22", "fr23", | |
665 | "fr24", "fr25", "fr26", "fr27", | |
666 | "fr28", "fr29", "fr30", "fr31" | |
667 | }; | |
668 | if (i < 0 || i >= (sizeof (names) / sizeof (*names))) | |
669 | return NULL; | |
670 | else | |
671 | return names[i]; | |
672 | } | |
673 | ||
85c83e99 | 674 | /* Map dwarf DBX register numbers to GDB register numbers. */ |
1ef7fcb5 | 675 | static int |
d3f73121 | 676 | hppa64_dwarf_reg_to_regnum (struct gdbarch *gdbarch, int reg) |
1ef7fcb5 | 677 | { |
85c83e99 | 678 | /* The general registers and the sar are the same in both sets. */ |
0fde2c53 | 679 | if (reg >= 0 && reg <= 32) |
1ef7fcb5 RC |
680 | return reg; |
681 | ||
682 | /* fr4-fr31 are mapped from 72 in steps of 2. */ | |
85c83e99 | 683 | if (reg >= 72 && reg < 72 + 28 * 2 && !(reg & 1)) |
1ef7fcb5 RC |
684 | return HPPA64_FP4_REGNUM + (reg - 72) / 2; |
685 | ||
1ef7fcb5 RC |
686 | return -1; |
687 | } | |
688 | ||
79508e1e AC |
689 | /* This function pushes a stack frame with arguments as part of the |
690 | inferior function calling mechanism. | |
691 | ||
692 | This is the version of the function for the 32-bit PA machines, in | |
693 | which later arguments appear at lower addresses. (The stack always | |
694 | grows towards higher addresses.) | |
695 | ||
696 | We simply allocate the appropriate amount of stack space and put | |
697 | arguments into their proper slots. */ | |
698 | ||
4a302917 | 699 | static CORE_ADDR |
7d9b040b | 700 | hppa32_push_dummy_call (struct gdbarch *gdbarch, struct value *function, |
79508e1e AC |
701 | struct regcache *regcache, CORE_ADDR bp_addr, |
702 | int nargs, struct value **args, CORE_ADDR sp, | |
cf84fa6b AH |
703 | function_call_return_method return_method, |
704 | CORE_ADDR struct_addr) | |
79508e1e | 705 | { |
e17a4113 UW |
706 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
707 | ||
79508e1e AC |
708 | /* Stack base address at which any pass-by-reference parameters are |
709 | stored. */ | |
710 | CORE_ADDR struct_end = 0; | |
711 | /* Stack base address at which the first parameter is stored. */ | |
712 | CORE_ADDR param_end = 0; | |
713 | ||
79508e1e AC |
714 | /* Two passes. First pass computes the location of everything, |
715 | second pass writes the bytes out. */ | |
716 | int write_pass; | |
d49771ef RC |
717 | |
718 | /* Global pointer (r19) of the function we are trying to call. */ | |
719 | CORE_ADDR gp; | |
720 | ||
345bd07c | 721 | hppa_gdbarch_tdep *tdep = (hppa_gdbarch_tdep *) gdbarch_tdep (gdbarch); |
d49771ef | 722 | |
79508e1e AC |
723 | for (write_pass = 0; write_pass < 2; write_pass++) |
724 | { | |
1797a8f6 | 725 | CORE_ADDR struct_ptr = 0; |
1777feb0 | 726 | /* The first parameter goes into sp-36, each stack slot is 4-bytes. |
dda83cd7 | 727 | struct_ptr is adjusted for each argument below, so the first |
2a6228ef RC |
728 | argument will end up at sp-36. */ |
729 | CORE_ADDR param_ptr = 32; | |
79508e1e | 730 | int i; |
2a6228ef RC |
731 | int small_struct = 0; |
732 | ||
79508e1e AC |
733 | for (i = 0; i < nargs; i++) |
734 | { | |
735 | struct value *arg = args[i]; | |
4991999e | 736 | struct type *type = check_typedef (value_type (arg)); |
79508e1e AC |
737 | /* The corresponding parameter that is pushed onto the |
738 | stack, and [possibly] passed in a register. */ | |
948f8e3d | 739 | gdb_byte param_val[8]; |
79508e1e AC |
740 | int param_len; |
741 | memset (param_val, 0, sizeof param_val); | |
742 | if (TYPE_LENGTH (type) > 8) | |
743 | { | |
744 | /* Large parameter, pass by reference. Store the value | |
745 | in "struct" area and then pass its address. */ | |
746 | param_len = 4; | |
1797a8f6 | 747 | struct_ptr += align_up (TYPE_LENGTH (type), 8); |
79508e1e | 748 | if (write_pass) |
50888e42 SM |
749 | write_memory (struct_end - struct_ptr, |
750 | value_contents (arg).data (), TYPE_LENGTH (type)); | |
e17a4113 UW |
751 | store_unsigned_integer (param_val, 4, byte_order, |
752 | struct_end - struct_ptr); | |
79508e1e | 753 | } |
78134374 SM |
754 | else if (type->code () == TYPE_CODE_INT |
755 | || type->code () == TYPE_CODE_ENUM) | |
79508e1e AC |
756 | { |
757 | /* Integer value store, right aligned. "unpack_long" | |
758 | takes care of any sign-extension problems. */ | |
759 | param_len = align_up (TYPE_LENGTH (type), 4); | |
50888e42 SM |
760 | store_unsigned_integer |
761 | (param_val, param_len, byte_order, | |
762 | unpack_long (type, value_contents (arg).data ())); | |
79508e1e | 763 | } |
78134374 | 764 | else if (type->code () == TYPE_CODE_FLT) |
dda83cd7 | 765 | { |
2a6228ef RC |
766 | /* Floating point value store, right aligned. */ |
767 | param_len = align_up (TYPE_LENGTH (type), 4); | |
50888e42 | 768 | memcpy (param_val, value_contents (arg).data (), param_len); |
dda83cd7 | 769 | } |
79508e1e AC |
770 | else |
771 | { | |
79508e1e | 772 | param_len = align_up (TYPE_LENGTH (type), 4); |
2a6228ef RC |
773 | |
774 | /* Small struct value are stored right-aligned. */ | |
79508e1e | 775 | memcpy (param_val + param_len - TYPE_LENGTH (type), |
50888e42 | 776 | value_contents (arg).data (), TYPE_LENGTH (type)); |
2a6228ef RC |
777 | |
778 | /* Structures of size 5, 6 and 7 bytes are special in that | |
dda83cd7 | 779 | the higher-ordered word is stored in the lower-ordered |
2a6228ef RC |
780 | argument, and even though it is a 8-byte quantity the |
781 | registers need not be 8-byte aligned. */ | |
1b07b470 | 782 | if (param_len > 4 && param_len < 8) |
2a6228ef | 783 | small_struct = 1; |
79508e1e | 784 | } |
2a6228ef | 785 | |
1797a8f6 | 786 | param_ptr += param_len; |
2a6228ef | 787 | if (param_len == 8 && !small_struct) |
dda83cd7 | 788 | param_ptr = align_up (param_ptr, 8); |
2a6228ef RC |
789 | |
790 | /* First 4 non-FP arguments are passed in gr26-gr23. | |
791 | First 4 32-bit FP arguments are passed in fr4L-fr7L. | |
792 | First 2 64-bit FP arguments are passed in fr5 and fr7. | |
793 | ||
794 | The rest go on the stack, starting at sp-36, towards lower | |
795 | addresses. 8-byte arguments must be aligned to a 8-byte | |
796 | stack boundary. */ | |
79508e1e AC |
797 | if (write_pass) |
798 | { | |
1797a8f6 | 799 | write_memory (param_end - param_ptr, param_val, param_len); |
2a6228ef RC |
800 | |
801 | /* There are some cases when we don't know the type | |
802 | expected by the callee (e.g. for variadic functions), so | |
803 | pass the parameters in both general and fp regs. */ | |
804 | if (param_ptr <= 48) | |
79508e1e | 805 | { |
2a6228ef RC |
806 | int grreg = 26 - (param_ptr - 36) / 4; |
807 | int fpLreg = 72 + (param_ptr - 36) / 4 * 2; | |
808 | int fpreg = 74 + (param_ptr - 32) / 8 * 4; | |
809 | ||
b66f5587 SM |
810 | regcache->cooked_write (grreg, param_val); |
811 | regcache->cooked_write (fpLreg, param_val); | |
2a6228ef | 812 | |
79508e1e | 813 | if (param_len > 4) |
2a6228ef | 814 | { |
b66f5587 | 815 | regcache->cooked_write (grreg + 1, param_val + 4); |
2a6228ef | 816 | |
b66f5587 SM |
817 | regcache->cooked_write (fpreg, param_val); |
818 | regcache->cooked_write (fpreg + 1, param_val + 4); | |
2a6228ef | 819 | } |
79508e1e AC |
820 | } |
821 | } | |
822 | } | |
823 | ||
824 | /* Update the various stack pointers. */ | |
825 | if (!write_pass) | |
826 | { | |
2a6228ef | 827 | struct_end = sp + align_up (struct_ptr, 64); |
79508e1e AC |
828 | /* PARAM_PTR already accounts for all the arguments passed |
829 | by the user. However, the ABI mandates minimum stack | |
830 | space allocations for outgoing arguments. The ABI also | |
831 | mandates minimum stack alignments which we must | |
832 | preserve. */ | |
2a6228ef | 833 | param_end = struct_end + align_up (param_ptr, 64); |
79508e1e AC |
834 | } |
835 | } | |
836 | ||
837 | /* If a structure has to be returned, set up register 28 to hold its | |
1777feb0 | 838 | address. */ |
cf84fa6b | 839 | if (return_method == return_method_struct) |
9c9acae0 | 840 | regcache_cooked_write_unsigned (regcache, 28, struct_addr); |
79508e1e | 841 | |
e38c262f | 842 | gp = tdep->find_global_pointer (gdbarch, function); |
d49771ef RC |
843 | |
844 | if (gp != 0) | |
9c9acae0 | 845 | regcache_cooked_write_unsigned (regcache, 19, gp); |
d49771ef | 846 | |
79508e1e | 847 | /* Set the return address. */ |
77d18ded RC |
848 | if (!gdbarch_push_dummy_code_p (gdbarch)) |
849 | regcache_cooked_write_unsigned (regcache, HPPA_RP_REGNUM, bp_addr); | |
79508e1e | 850 | |
c4557624 | 851 | /* Update the Stack Pointer. */ |
34f75cc1 | 852 | regcache_cooked_write_unsigned (regcache, HPPA_SP_REGNUM, param_end); |
c4557624 | 853 | |
2a6228ef | 854 | return param_end; |
79508e1e AC |
855 | } |
856 | ||
38ca4e0c MK |
857 | /* The 64-bit PA-RISC calling conventions are documented in "64-Bit |
858 | Runtime Architecture for PA-RISC 2.0", which is distributed as part | |
859 | as of the HP-UX Software Transition Kit (STK). This implementation | |
860 | is based on version 3.3, dated October 6, 1997. */ | |
2f690297 | 861 | |
38ca4e0c | 862 | /* Check whether TYPE is an "Integral or Pointer Scalar Type". */ |
2f690297 | 863 | |
38ca4e0c MK |
864 | static int |
865 | hppa64_integral_or_pointer_p (const struct type *type) | |
866 | { | |
78134374 | 867 | switch (type->code ()) |
38ca4e0c MK |
868 | { |
869 | case TYPE_CODE_INT: | |
870 | case TYPE_CODE_BOOL: | |
871 | case TYPE_CODE_CHAR: | |
872 | case TYPE_CODE_ENUM: | |
873 | case TYPE_CODE_RANGE: | |
874 | { | |
875 | int len = TYPE_LENGTH (type); | |
876 | return (len == 1 || len == 2 || len == 4 || len == 8); | |
877 | } | |
878 | case TYPE_CODE_PTR: | |
879 | case TYPE_CODE_REF: | |
aa006118 | 880 | case TYPE_CODE_RVALUE_REF: |
38ca4e0c MK |
881 | return (TYPE_LENGTH (type) == 8); |
882 | default: | |
883 | break; | |
884 | } | |
885 | ||
886 | return 0; | |
887 | } | |
888 | ||
889 | /* Check whether TYPE is a "Floating Scalar Type". */ | |
890 | ||
891 | static int | |
892 | hppa64_floating_p (const struct type *type) | |
893 | { | |
78134374 | 894 | switch (type->code ()) |
38ca4e0c MK |
895 | { |
896 | case TYPE_CODE_FLT: | |
897 | { | |
898 | int len = TYPE_LENGTH (type); | |
899 | return (len == 4 || len == 8 || len == 16); | |
900 | } | |
901 | default: | |
902 | break; | |
903 | } | |
904 | ||
905 | return 0; | |
906 | } | |
2f690297 | 907 | |
1218e655 RC |
908 | /* If CODE points to a function entry address, try to look up the corresponding |
909 | function descriptor and return its address instead. If CODE is not a | |
910 | function entry address, then just return it unchanged. */ | |
911 | static CORE_ADDR | |
e17a4113 | 912 | hppa64_convert_code_addr_to_fptr (struct gdbarch *gdbarch, CORE_ADDR code) |
1218e655 | 913 | { |
e17a4113 | 914 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
1218e655 RC |
915 | struct obj_section *sec, *opd; |
916 | ||
917 | sec = find_pc_section (code); | |
918 | ||
919 | if (!sec) | |
920 | return code; | |
921 | ||
922 | /* If CODE is in a data section, assume it's already a fptr. */ | |
923 | if (!(sec->the_bfd_section->flags & SEC_CODE)) | |
924 | return code; | |
925 | ||
926 | ALL_OBJFILE_OSECTIONS (sec->objfile, opd) | |
927 | { | |
928 | if (strcmp (opd->the_bfd_section->name, ".opd") == 0) | |
aded6f54 | 929 | break; |
1218e655 RC |
930 | } |
931 | ||
932 | if (opd < sec->objfile->sections_end) | |
933 | { | |
0c1bcd23 | 934 | for (CORE_ADDR addr = opd->addr (); addr < opd->endaddr (); addr += 2 * 8) |
aded6f54 | 935 | { |
1218e655 | 936 | ULONGEST opdaddr; |
948f8e3d | 937 | gdb_byte tmp[8]; |
1218e655 RC |
938 | |
939 | if (target_read_memory (addr, tmp, sizeof (tmp))) | |
940 | break; | |
e17a4113 | 941 | opdaddr = extract_unsigned_integer (tmp, sizeof (tmp), byte_order); |
1218e655 | 942 | |
aded6f54 | 943 | if (opdaddr == code) |
1218e655 RC |
944 | return addr - 16; |
945 | } | |
946 | } | |
947 | ||
948 | return code; | |
949 | } | |
950 | ||
4a302917 | 951 | static CORE_ADDR |
7d9b040b | 952 | hppa64_push_dummy_call (struct gdbarch *gdbarch, struct value *function, |
2f690297 AC |
953 | struct regcache *regcache, CORE_ADDR bp_addr, |
954 | int nargs, struct value **args, CORE_ADDR sp, | |
cf84fa6b AH |
955 | function_call_return_method return_method, |
956 | CORE_ADDR struct_addr) | |
2f690297 | 957 | { |
345bd07c | 958 | hppa_gdbarch_tdep *tdep = (hppa_gdbarch_tdep *) gdbarch_tdep (gdbarch); |
e17a4113 | 959 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
38ca4e0c MK |
960 | int i, offset = 0; |
961 | CORE_ADDR gp; | |
2f690297 | 962 | |
38ca4e0c MK |
963 | /* "The outgoing parameter area [...] must be aligned at a 16-byte |
964 | boundary." */ | |
965 | sp = align_up (sp, 16); | |
2f690297 | 966 | |
38ca4e0c MK |
967 | for (i = 0; i < nargs; i++) |
968 | { | |
969 | struct value *arg = args[i]; | |
970 | struct type *type = value_type (arg); | |
971 | int len = TYPE_LENGTH (type); | |
0fd88904 | 972 | const bfd_byte *valbuf; |
1218e655 | 973 | bfd_byte fptrbuf[8]; |
38ca4e0c | 974 | int regnum; |
2f690297 | 975 | |
38ca4e0c MK |
976 | /* "Each parameter begins on a 64-bit (8-byte) boundary." */ |
977 | offset = align_up (offset, 8); | |
77d18ded | 978 | |
38ca4e0c | 979 | if (hppa64_integral_or_pointer_p (type)) |
2f690297 | 980 | { |
38ca4e0c | 981 | /* "Integral scalar parameters smaller than 64 bits are |
dda83cd7 SM |
982 | padded on the left (i.e., the value is in the |
983 | least-significant bits of the 64-bit storage unit, and | |
984 | the high-order bits are undefined)." Therefore we can | |
985 | safely sign-extend them. */ | |
38ca4e0c | 986 | if (len < 8) |
449e1137 | 987 | { |
df4df182 | 988 | arg = value_cast (builtin_type (gdbarch)->builtin_int64, arg); |
38ca4e0c MK |
989 | len = 8; |
990 | } | |
991 | } | |
992 | else if (hppa64_floating_p (type)) | |
993 | { | |
994 | if (len > 8) | |
995 | { | |
996 | /* "Quad-precision (128-bit) floating-point scalar | |
997 | parameters are aligned on a 16-byte boundary." */ | |
998 | offset = align_up (offset, 16); | |
999 | ||
1000 | /* "Double-extended- and quad-precision floating-point | |
dda83cd7 SM |
1001 | parameters within the first 64 bytes of the parameter |
1002 | list are always passed in general registers." */ | |
449e1137 AC |
1003 | } |
1004 | else | |
1005 | { | |
38ca4e0c | 1006 | if (len == 4) |
449e1137 | 1007 | { |
38ca4e0c MK |
1008 | /* "Single-precision (32-bit) floating-point scalar |
1009 | parameters are padded on the left with 32 bits of | |
1010 | garbage (i.e., the floating-point value is in the | |
1011 | least-significant 32 bits of a 64-bit storage | |
1012 | unit)." */ | |
1013 | offset += 4; | |
449e1137 | 1014 | } |
38ca4e0c MK |
1015 | |
1016 | /* "Single- and double-precision floating-point | |
dda83cd7 SM |
1017 | parameters in this area are passed according to the |
1018 | available formal parameter information in a function | |
1019 | prototype. [...] If no prototype is in scope, | |
1020 | floating-point parameters must be passed both in the | |
1021 | corresponding general registers and in the | |
1022 | corresponding floating-point registers." */ | |
38ca4e0c MK |
1023 | regnum = HPPA64_FP4_REGNUM + offset / 8; |
1024 | ||
1025 | if (regnum < HPPA64_FP4_REGNUM + 8) | |
449e1137 | 1026 | { |
38ca4e0c MK |
1027 | /* "Single-precision floating-point parameters, when |
1028 | passed in floating-point registers, are passed in | |
1029 | the right halves of the floating point registers; | |
1030 | the left halves are unused." */ | |
e4c4a59b | 1031 | regcache->cooked_write_part (regnum, offset % 8, len, |
50888e42 | 1032 | value_contents (arg).data ()); |
449e1137 AC |
1033 | } |
1034 | } | |
2f690297 | 1035 | } |
38ca4e0c | 1036 | else |
2f690297 | 1037 | { |
38ca4e0c MK |
1038 | if (len > 8) |
1039 | { | |
1040 | /* "Aggregates larger than 8 bytes are aligned on a | |
1041 | 16-byte boundary, possibly leaving an unused argument | |
1777feb0 | 1042 | slot, which is filled with garbage. If necessary, |
38ca4e0c MK |
1043 | they are padded on the right (with garbage), to a |
1044 | multiple of 8 bytes." */ | |
1045 | offset = align_up (offset, 16); | |
1046 | } | |
1047 | } | |
1048 | ||
1218e655 | 1049 | /* If we are passing a function pointer, make sure we pass a function |
dda83cd7 | 1050 | descriptor instead of the function entry address. */ |
78134374 | 1051 | if (type->code () == TYPE_CODE_PTR |
dda83cd7 SM |
1052 | && TYPE_TARGET_TYPE (type)->code () == TYPE_CODE_FUNC) |
1053 | { | |
1218e655 RC |
1054 | ULONGEST codeptr, fptr; |
1055 | ||
50888e42 | 1056 | codeptr = unpack_long (type, value_contents (arg).data ()); |
e17a4113 UW |
1057 | fptr = hppa64_convert_code_addr_to_fptr (gdbarch, codeptr); |
1058 | store_unsigned_integer (fptrbuf, TYPE_LENGTH (type), byte_order, | |
1059 | fptr); | |
1218e655 RC |
1060 | valbuf = fptrbuf; |
1061 | } | |
1062 | else | |
dda83cd7 | 1063 | { |
50888e42 | 1064 | valbuf = value_contents (arg).data (); |
1218e655 RC |
1065 | } |
1066 | ||
38ca4e0c | 1067 | /* Always store the argument in memory. */ |
1218e655 | 1068 | write_memory (sp + offset, valbuf, len); |
38ca4e0c | 1069 | |
38ca4e0c MK |
1070 | regnum = HPPA_ARG0_REGNUM - offset / 8; |
1071 | while (regnum > HPPA_ARG0_REGNUM - 8 && len > 0) | |
1072 | { | |
e4c4a59b SM |
1073 | regcache->cooked_write_part (regnum, offset % 8, std::min (len, 8), |
1074 | valbuf); | |
325fac50 PA |
1075 | offset += std::min (len, 8); |
1076 | valbuf += std::min (len, 8); | |
1077 | len -= std::min (len, 8); | |
38ca4e0c | 1078 | regnum--; |
2f690297 | 1079 | } |
38ca4e0c MK |
1080 | |
1081 | offset += len; | |
2f690297 AC |
1082 | } |
1083 | ||
38ca4e0c MK |
1084 | /* Set up GR29 (%ret1) to hold the argument pointer (ap). */ |
1085 | regcache_cooked_write_unsigned (regcache, HPPA_RET1_REGNUM, sp + 64); | |
1086 | ||
1087 | /* Allocate the outgoing parameter area. Make sure the outgoing | |
1088 | parameter area is multiple of 16 bytes in length. */ | |
325fac50 | 1089 | sp += std::max (align_up (offset, 16), (ULONGEST) 64); |
38ca4e0c MK |
1090 | |
1091 | /* Allocate 32-bytes of scratch space. The documentation doesn't | |
1092 | mention this, but it seems to be needed. */ | |
1093 | sp += 32; | |
1094 | ||
1095 | /* Allocate the frame marker area. */ | |
1096 | sp += 16; | |
1097 | ||
1098 | /* If a structure has to be returned, set up GR 28 (%ret0) to hold | |
1099 | its address. */ | |
cf84fa6b | 1100 | if (return_method == return_method_struct) |
38ca4e0c | 1101 | regcache_cooked_write_unsigned (regcache, HPPA_RET0_REGNUM, struct_addr); |
2f690297 | 1102 | |
38ca4e0c | 1103 | /* Set up GR27 (%dp) to hold the global pointer (gp). */ |
e38c262f | 1104 | gp = tdep->find_global_pointer (gdbarch, function); |
77d18ded | 1105 | if (gp != 0) |
38ca4e0c | 1106 | regcache_cooked_write_unsigned (regcache, HPPA_DP_REGNUM, gp); |
77d18ded | 1107 | |
38ca4e0c | 1108 | /* Set up GR2 (%rp) to hold the return pointer (rp). */ |
77d18ded RC |
1109 | if (!gdbarch_push_dummy_code_p (gdbarch)) |
1110 | regcache_cooked_write_unsigned (regcache, HPPA_RP_REGNUM, bp_addr); | |
2f690297 | 1111 | |
38ca4e0c MK |
1112 | /* Set up GR30 to hold the stack pointer (sp). */ |
1113 | regcache_cooked_write_unsigned (regcache, HPPA_SP_REGNUM, sp); | |
c4557624 | 1114 | |
38ca4e0c | 1115 | return sp; |
2f690297 | 1116 | } |
38ca4e0c | 1117 | \f |
2f690297 | 1118 | |
08a27113 MK |
1119 | /* Handle 32/64-bit struct return conventions. */ |
1120 | ||
1121 | static enum return_value_convention | |
6a3a010b | 1122 | hppa32_return_value (struct gdbarch *gdbarch, struct value *function, |
08a27113 | 1123 | struct type *type, struct regcache *regcache, |
e127f0db | 1124 | gdb_byte *readbuf, const gdb_byte *writebuf) |
08a27113 MK |
1125 | { |
1126 | if (TYPE_LENGTH (type) <= 2 * 4) | |
1127 | { | |
1128 | /* The value always lives in the right hand end of the register | |
1129 | (or register pair)? */ | |
1130 | int b; | |
78134374 | 1131 | int reg = type->code () == TYPE_CODE_FLT ? HPPA_FP4_REGNUM : 28; |
08a27113 MK |
1132 | int part = TYPE_LENGTH (type) % 4; |
1133 | /* The left hand register contains only part of the value, | |
1134 | transfer that first so that the rest can be xfered as entire | |
1135 | 4-byte registers. */ | |
1136 | if (part > 0) | |
1137 | { | |
1138 | if (readbuf != NULL) | |
73bb0000 | 1139 | regcache->cooked_read_part (reg, 4 - part, part, readbuf); |
08a27113 | 1140 | if (writebuf != NULL) |
e4c4a59b | 1141 | regcache->cooked_write_part (reg, 4 - part, part, writebuf); |
08a27113 MK |
1142 | reg++; |
1143 | } | |
1144 | /* Now transfer the remaining register values. */ | |
1145 | for (b = part; b < TYPE_LENGTH (type); b += 4) | |
1146 | { | |
1147 | if (readbuf != NULL) | |
dca08e1f | 1148 | regcache->cooked_read (reg, readbuf + b); |
08a27113 | 1149 | if (writebuf != NULL) |
b66f5587 | 1150 | regcache->cooked_write (reg, writebuf + b); |
08a27113 MK |
1151 | reg++; |
1152 | } | |
1153 | return RETURN_VALUE_REGISTER_CONVENTION; | |
1154 | } | |
1155 | else | |
1156 | return RETURN_VALUE_STRUCT_CONVENTION; | |
1157 | } | |
1158 | ||
1159 | static enum return_value_convention | |
6a3a010b | 1160 | hppa64_return_value (struct gdbarch *gdbarch, struct value *function, |
08a27113 | 1161 | struct type *type, struct regcache *regcache, |
e127f0db | 1162 | gdb_byte *readbuf, const gdb_byte *writebuf) |
08a27113 MK |
1163 | { |
1164 | int len = TYPE_LENGTH (type); | |
1165 | int regnum, offset; | |
1166 | ||
bad43aa5 | 1167 | if (len > 16) |
08a27113 | 1168 | { |
85102364 | 1169 | /* All return values larger than 128 bits must be aggregate |
dda83cd7 | 1170 | return values. */ |
9738b034 MK |
1171 | gdb_assert (!hppa64_integral_or_pointer_p (type)); |
1172 | gdb_assert (!hppa64_floating_p (type)); | |
08a27113 MK |
1173 | |
1174 | /* "Aggregate return values larger than 128 bits are returned in | |
1175 | a buffer allocated by the caller. The address of the buffer | |
1176 | must be passed in GR 28." */ | |
1177 | return RETURN_VALUE_STRUCT_CONVENTION; | |
1178 | } | |
1179 | ||
1180 | if (hppa64_integral_or_pointer_p (type)) | |
1181 | { | |
1182 | /* "Integral return values are returned in GR 28. Values | |
dda83cd7 | 1183 | smaller than 64 bits are padded on the left (with garbage)." */ |
08a27113 MK |
1184 | regnum = HPPA_RET0_REGNUM; |
1185 | offset = 8 - len; | |
1186 | } | |
1187 | else if (hppa64_floating_p (type)) | |
1188 | { | |
1189 | if (len > 8) | |
1190 | { | |
1191 | /* "Double-extended- and quad-precision floating-point | |
1192 | values are returned in GRs 28 and 29. The sign, | |
1193 | exponent, and most-significant bits of the mantissa are | |
1194 | returned in GR 28; the least-significant bits of the | |
1195 | mantissa are passed in GR 29. For double-extended | |
1196 | precision values, GR 29 is padded on the right with 48 | |
1197 | bits of garbage." */ | |
1198 | regnum = HPPA_RET0_REGNUM; | |
1199 | offset = 0; | |
1200 | } | |
1201 | else | |
1202 | { | |
1203 | /* "Single-precision and double-precision floating-point | |
1204 | return values are returned in FR 4R (single precision) or | |
1205 | FR 4 (double-precision)." */ | |
1206 | regnum = HPPA64_FP4_REGNUM; | |
1207 | offset = 8 - len; | |
1208 | } | |
1209 | } | |
1210 | else | |
1211 | { | |
1212 | /* "Aggregate return values up to 64 bits in size are returned | |
dda83cd7 SM |
1213 | in GR 28. Aggregates smaller than 64 bits are left aligned |
1214 | in the register; the pad bits on the right are undefined." | |
08a27113 MK |
1215 | |
1216 | "Aggregate return values between 65 and 128 bits are returned | |
1217 | in GRs 28 and 29. The first 64 bits are placed in GR 28, and | |
1218 | the remaining bits are placed, left aligned, in GR 29. The | |
1219 | pad bits on the right of GR 29 (if any) are undefined." */ | |
1220 | regnum = HPPA_RET0_REGNUM; | |
1221 | offset = 0; | |
1222 | } | |
1223 | ||
1224 | if (readbuf) | |
1225 | { | |
08a27113 MK |
1226 | while (len > 0) |
1227 | { | |
73bb0000 SM |
1228 | regcache->cooked_read_part (regnum, offset, std::min (len, 8), |
1229 | readbuf); | |
325fac50 PA |
1230 | readbuf += std::min (len, 8); |
1231 | len -= std::min (len, 8); | |
08a27113 MK |
1232 | regnum++; |
1233 | } | |
1234 | } | |
1235 | ||
1236 | if (writebuf) | |
1237 | { | |
08a27113 MK |
1238 | while (len > 0) |
1239 | { | |
e4c4a59b SM |
1240 | regcache->cooked_write_part (regnum, offset, std::min (len, 8), |
1241 | writebuf); | |
325fac50 PA |
1242 | writebuf += std::min (len, 8); |
1243 | len -= std::min (len, 8); | |
08a27113 MK |
1244 | regnum++; |
1245 | } | |
1246 | } | |
1247 | ||
1248 | return RETURN_VALUE_REGISTER_CONVENTION; | |
1249 | } | |
1250 | \f | |
1251 | ||
d49771ef | 1252 | static CORE_ADDR |
a7aad9aa | 1253 | hppa32_convert_from_func_ptr_addr (struct gdbarch *gdbarch, CORE_ADDR addr, |
d49771ef RC |
1254 | struct target_ops *targ) |
1255 | { | |
1256 | if (addr & 2) | |
1257 | { | |
0dfff4cb | 1258 | struct type *func_ptr_type = builtin_type (gdbarch)->builtin_func_ptr; |
a7aad9aa | 1259 | CORE_ADDR plabel = addr & ~3; |
0dfff4cb | 1260 | return read_memory_typed_address (plabel, func_ptr_type); |
d49771ef RC |
1261 | } |
1262 | ||
1263 | return addr; | |
1264 | } | |
1265 | ||
1797a8f6 AC |
1266 | static CORE_ADDR |
1267 | hppa32_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr) | |
1268 | { | |
1269 | /* HP frames are 64-byte (or cache line) aligned (yes that's _byte_ | |
1270 | and not _bit_)! */ | |
1271 | return align_up (addr, 64); | |
1272 | } | |
1273 | ||
2f690297 AC |
1274 | /* Force all frames to 16-byte alignment. Better safe than sorry. */ |
1275 | ||
1276 | static CORE_ADDR | |
1797a8f6 | 1277 | hppa64_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr) |
2f690297 AC |
1278 | { |
1279 | /* Just always 16-byte align. */ | |
1280 | return align_up (addr, 16); | |
1281 | } | |
1282 | ||
cb8c24b6 | 1283 | static CORE_ADDR |
c113ed0c | 1284 | hppa_read_pc (readable_regcache *regcache) |
c906108c | 1285 | { |
cc72850f | 1286 | ULONGEST ipsw; |
61a1198a | 1287 | ULONGEST pc; |
c906108c | 1288 | |
c113ed0c YQ |
1289 | regcache->cooked_read (HPPA_IPSW_REGNUM, &ipsw); |
1290 | regcache->cooked_read (HPPA_PCOQ_HEAD_REGNUM, &pc); | |
fe46cd3a RC |
1291 | |
1292 | /* If the current instruction is nullified, then we are effectively | |
1293 | still executing the previous instruction. Pretend we are still | |
cc72850f MK |
1294 | there. This is needed when single stepping; if the nullified |
1295 | instruction is on a different line, we don't want GDB to think | |
1296 | we've stepped onto that line. */ | |
fe46cd3a RC |
1297 | if (ipsw & 0x00200000) |
1298 | pc -= 4; | |
1299 | ||
cc72850f | 1300 | return pc & ~0x3; |
c906108c SS |
1301 | } |
1302 | ||
cc72850f | 1303 | void |
61a1198a | 1304 | hppa_write_pc (struct regcache *regcache, CORE_ADDR pc) |
c906108c | 1305 | { |
61a1198a UW |
1306 | regcache_cooked_write_unsigned (regcache, HPPA_PCOQ_HEAD_REGNUM, pc); |
1307 | regcache_cooked_write_unsigned (regcache, HPPA_PCOQ_TAIL_REGNUM, pc + 4); | |
c906108c SS |
1308 | } |
1309 | ||
c906108c | 1310 | /* For the given instruction (INST), return any adjustment it makes |
1777feb0 | 1311 | to the stack pointer or zero for no adjustment. |
c906108c SS |
1312 | |
1313 | This only handles instructions commonly found in prologues. */ | |
1314 | ||
1315 | static int | |
fba45db2 | 1316 | prologue_inst_adjust_sp (unsigned long inst) |
c906108c SS |
1317 | { |
1318 | /* This must persist across calls. */ | |
1319 | static int save_high21; | |
1320 | ||
1321 | /* The most common way to perform a stack adjustment ldo X(sp),sp */ | |
1322 | if ((inst & 0xffffc000) == 0x37de0000) | |
abc485a1 | 1323 | return hppa_extract_14 (inst); |
c906108c SS |
1324 | |
1325 | /* stwm X,D(sp) */ | |
1326 | if ((inst & 0xffe00000) == 0x6fc00000) | |
abc485a1 | 1327 | return hppa_extract_14 (inst); |
c906108c | 1328 | |
104c1213 JM |
1329 | /* std,ma X,D(sp) */ |
1330 | if ((inst & 0xffe00008) == 0x73c00008) | |
66c6502d | 1331 | return (inst & 0x1 ? -(1 << 13) : 0) | (((inst >> 4) & 0x3ff) << 3); |
104c1213 | 1332 | |
e22b26cb | 1333 | /* addil high21,%r30; ldo low11,(%r1),%r30) |
c906108c | 1334 | save high bits in save_high21 for later use. */ |
e22b26cb | 1335 | if ((inst & 0xffe00000) == 0x2bc00000) |
c906108c | 1336 | { |
abc485a1 | 1337 | save_high21 = hppa_extract_21 (inst); |
c906108c SS |
1338 | return 0; |
1339 | } | |
1340 | ||
1341 | if ((inst & 0xffff0000) == 0x343e0000) | |
abc485a1 | 1342 | return save_high21 + hppa_extract_14 (inst); |
c906108c SS |
1343 | |
1344 | /* fstws as used by the HP compilers. */ | |
1345 | if ((inst & 0xffffffe0) == 0x2fd01220) | |
abc485a1 | 1346 | return hppa_extract_5_load (inst); |
c906108c SS |
1347 | |
1348 | /* No adjustment. */ | |
1349 | return 0; | |
1350 | } | |
1351 | ||
1352 | /* Return nonzero if INST is a branch of some kind, else return zero. */ | |
1353 | ||
1354 | static int | |
fba45db2 | 1355 | is_branch (unsigned long inst) |
c906108c SS |
1356 | { |
1357 | switch (inst >> 26) | |
1358 | { | |
1359 | case 0x20: | |
1360 | case 0x21: | |
1361 | case 0x22: | |
1362 | case 0x23: | |
7be570e7 | 1363 | case 0x27: |
c906108c SS |
1364 | case 0x28: |
1365 | case 0x29: | |
1366 | case 0x2a: | |
1367 | case 0x2b: | |
7be570e7 | 1368 | case 0x2f: |
c906108c SS |
1369 | case 0x30: |
1370 | case 0x31: | |
1371 | case 0x32: | |
1372 | case 0x33: | |
1373 | case 0x38: | |
1374 | case 0x39: | |
1375 | case 0x3a: | |
7be570e7 | 1376 | case 0x3b: |
c906108c SS |
1377 | return 1; |
1378 | ||
1379 | default: | |
1380 | return 0; | |
1381 | } | |
1382 | } | |
1383 | ||
1384 | /* Return the register number for a GR which is saved by INST or | |
b35018fd | 1385 | zero if INST does not save a GR. |
c906108c | 1386 | |
b35018fd | 1387 | Referenced from: |
7be570e7 | 1388 | |
b35018fd CG |
1389 | parisc 1.1: |
1390 | https://parisc.wiki.kernel.org/images-parisc/6/68/Pa11_acd.pdf | |
c906108c | 1391 | |
b35018fd CG |
1392 | parisc 2.0: |
1393 | https://parisc.wiki.kernel.org/images-parisc/7/73/Parisc2.0.pdf | |
c906108c | 1394 | |
b35018fd CG |
1395 | According to Table 6-5 of Chapter 6 (Memory Reference Instructions) |
1396 | on page 106 in parisc 2.0, all instructions for storing values from | |
1397 | the general registers are: | |
c5aa993b | 1398 | |
b35018fd | 1399 | Store: stb, sth, stw, std (according to Chapter 7, they |
dda83cd7 | 1400 | are only in both "inst >> 26" and "inst >> 6". |
b35018fd | 1401 | Store Absolute: stwa, stda (according to Chapter 7, they are only |
dda83cd7 | 1402 | in "inst >> 6". |
b35018fd | 1403 | Store Bytes: stby, stdby (according to Chapter 7, they are |
dda83cd7 | 1404 | only in "inst >> 6"). |
b35018fd CG |
1405 | |
1406 | For (inst >> 26), according to Chapter 7: | |
1407 | ||
1408 | The effective memory reference address is formed by the addition | |
1409 | of an immediate displacement to a base value. | |
1410 | ||
1411 | - stb: 0x18, store a byte from a general register. | |
1412 | ||
1413 | - sth: 0x19, store a halfword from a general register. | |
1414 | ||
1415 | - stw: 0x1a, store a word from a general register. | |
1416 | ||
1417 | - stwm: 0x1b, store a word from a general register and perform base | |
85102364 | 1418 | register modification (2.0 will still treat it as stw). |
b35018fd CG |
1419 | |
1420 | - std: 0x1c, store a doubleword from a general register (2.0 only). | |
1421 | ||
1422 | - stw: 0x1f, store a word from a general register (2.0 only). | |
1423 | ||
1424 | For (inst >> 6) when ((inst >> 26) == 0x03), according to Chapter 7: | |
1425 | ||
1426 | The effective memory reference address is formed by the addition | |
1427 | of an index value to a base value specified in the instruction. | |
1428 | ||
1429 | - stb: 0x08, store a byte from a general register (1.1 calls stbs). | |
1430 | ||
1431 | - sth: 0x09, store a halfword from a general register (1.1 calls | |
1432 | sths). | |
1433 | ||
1434 | - stw: 0x0a, store a word from a general register (1.1 calls stws). | |
1435 | ||
1436 | - std: 0x0b: store a doubleword from a general register (2.0 only) | |
1437 | ||
1438 | Implement fast byte moves (stores) to unaligned word or doubleword | |
1439 | destination. | |
1440 | ||
1441 | - stby: 0x0c, for unaligned word (1.1 calls stbys). | |
1442 | ||
1443 | - stdby: 0x0d for unaligned doubleword (2.0 only). | |
1444 | ||
1445 | Store a word or doubleword using an absolute memory address formed | |
1446 | using short or long displacement or indexed | |
1447 | ||
1448 | - stwa: 0x0e, store a word from a general register to an absolute | |
1449 | address (1.0 calls stwas). | |
1450 | ||
1451 | - stda: 0x0f, store a doubleword from a general register to an | |
1452 | absolute address (2.0 only). */ | |
1453 | ||
1454 | static int | |
1455 | inst_saves_gr (unsigned long inst) | |
1456 | { | |
1457 | switch ((inst >> 26) & 0x0f) | |
1458 | { | |
1459 | case 0x03: | |
1460 | switch ((inst >> 6) & 0x0f) | |
1461 | { | |
1462 | case 0x08: | |
1463 | case 0x09: | |
1464 | case 0x0a: | |
1465 | case 0x0b: | |
1466 | case 0x0c: | |
1467 | case 0x0d: | |
1468 | case 0x0e: | |
1469 | case 0x0f: | |
1470 | return hppa_extract_5R_store (inst); | |
1471 | default: | |
1472 | return 0; | |
1473 | } | |
1474 | case 0x18: | |
1475 | case 0x19: | |
1476 | case 0x1a: | |
1477 | case 0x1b: | |
1478 | case 0x1c: | |
1479 | /* no 0x1d or 0x1e -- according to parisc 2.0 document */ | |
1480 | case 0x1f: | |
1481 | return hppa_extract_5R_store (inst); | |
1482 | default: | |
1483 | return 0; | |
1484 | } | |
c906108c SS |
1485 | } |
1486 | ||
1487 | /* Return the register number for a FR which is saved by INST or | |
1488 | zero it INST does not save a FR. | |
1489 | ||
1490 | Note we only care about full 64bit register stores (that's the only | |
1491 | kind of stores the prologue will use). | |
1492 | ||
1493 | FIXME: What about argument stores with the HP compiler in ANSI mode? */ | |
1494 | ||
1495 | static int | |
fba45db2 | 1496 | inst_saves_fr (unsigned long inst) |
c906108c | 1497 | { |
1777feb0 | 1498 | /* Is this an FSTD? */ |
c906108c | 1499 | if ((inst & 0xfc00dfc0) == 0x2c001200) |
abc485a1 | 1500 | return hppa_extract_5r_store (inst); |
7be570e7 | 1501 | if ((inst & 0xfc000002) == 0x70000002) |
abc485a1 | 1502 | return hppa_extract_5R_store (inst); |
1777feb0 | 1503 | /* Is this an FSTW? */ |
c906108c | 1504 | if ((inst & 0xfc00df80) == 0x24001200) |
abc485a1 | 1505 | return hppa_extract_5r_store (inst); |
7be570e7 | 1506 | if ((inst & 0xfc000002) == 0x7c000000) |
abc485a1 | 1507 | return hppa_extract_5R_store (inst); |
c906108c SS |
1508 | return 0; |
1509 | } | |
1510 | ||
1511 | /* Advance PC across any function entry prologue instructions | |
1777feb0 | 1512 | to reach some "real" code. |
c906108c SS |
1513 | |
1514 | Use information in the unwind table to determine what exactly should | |
1515 | be in the prologue. */ | |
1516 | ||
1517 | ||
a71f8c30 | 1518 | static CORE_ADDR |
be8626e0 MD |
1519 | skip_prologue_hard_way (struct gdbarch *gdbarch, CORE_ADDR pc, |
1520 | int stop_before_branch) | |
c906108c | 1521 | { |
e17a4113 | 1522 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
e362b510 | 1523 | gdb_byte buf[4]; |
c906108c SS |
1524 | CORE_ADDR orig_pc = pc; |
1525 | unsigned long inst, stack_remaining, save_gr, save_fr, save_rp, save_sp; | |
1526 | unsigned long args_stored, status, i, restart_gr, restart_fr; | |
1527 | struct unwind_table_entry *u; | |
a71f8c30 | 1528 | int final_iteration; |
c906108c SS |
1529 | |
1530 | restart_gr = 0; | |
1531 | restart_fr = 0; | |
1532 | ||
1533 | restart: | |
1534 | u = find_unwind_entry (pc); | |
1535 | if (!u) | |
1536 | return pc; | |
1537 | ||
1777feb0 | 1538 | /* If we are not at the beginning of a function, then return now. */ |
c906108c SS |
1539 | if ((pc & ~0x3) != u->region_start) |
1540 | return pc; | |
1541 | ||
1542 | /* This is how much of a frame adjustment we need to account for. */ | |
1543 | stack_remaining = u->Total_frame_size << 3; | |
1544 | ||
1545 | /* Magic register saves we want to know about. */ | |
1546 | save_rp = u->Save_RP; | |
1547 | save_sp = u->Save_SP; | |
1548 | ||
1549 | /* An indication that args may be stored into the stack. Unfortunately | |
1550 | the HPUX compilers tend to set this in cases where no args were | |
1551 | stored too!. */ | |
1552 | args_stored = 1; | |
1553 | ||
1554 | /* Turn the Entry_GR field into a bitmask. */ | |
1555 | save_gr = 0; | |
1556 | for (i = 3; i < u->Entry_GR + 3; i++) | |
1557 | { | |
1558 | /* Frame pointer gets saved into a special location. */ | |
eded0a31 | 1559 | if (u->Save_SP && i == HPPA_FP_REGNUM) |
c906108c SS |
1560 | continue; |
1561 | ||
1562 | save_gr |= (1 << i); | |
1563 | } | |
1564 | save_gr &= ~restart_gr; | |
1565 | ||
1566 | /* Turn the Entry_FR field into a bitmask too. */ | |
1567 | save_fr = 0; | |
1568 | for (i = 12; i < u->Entry_FR + 12; i++) | |
1569 | save_fr |= (1 << i); | |
1570 | save_fr &= ~restart_fr; | |
1571 | ||
a71f8c30 RC |
1572 | final_iteration = 0; |
1573 | ||
c906108c SS |
1574 | /* Loop until we find everything of interest or hit a branch. |
1575 | ||
1576 | For unoptimized GCC code and for any HP CC code this will never ever | |
1577 | examine any user instructions. | |
1578 | ||
85102364 | 1579 | For optimized GCC code we're faced with problems. GCC will schedule |
c906108c SS |
1580 | its prologue and make prologue instructions available for delay slot |
1581 | filling. The end result is user code gets mixed in with the prologue | |
1582 | and a prologue instruction may be in the delay slot of the first branch | |
1583 | or call. | |
1584 | ||
1585 | Some unexpected things are expected with debugging optimized code, so | |
1586 | we allow this routine to walk past user instructions in optimized | |
1587 | GCC code. */ | |
1588 | while (save_gr || save_fr || save_rp || save_sp || stack_remaining > 0 | |
1589 | || args_stored) | |
1590 | { | |
1591 | unsigned int reg_num; | |
1592 | unsigned long old_stack_remaining, old_save_gr, old_save_fr; | |
1593 | unsigned long old_save_rp, old_save_sp, next_inst; | |
1594 | ||
1595 | /* Save copies of all the triggers so we can compare them later | |
dda83cd7 | 1596 | (only for HPC). */ |
c906108c SS |
1597 | old_save_gr = save_gr; |
1598 | old_save_fr = save_fr; | |
1599 | old_save_rp = save_rp; | |
1600 | old_save_sp = save_sp; | |
1601 | old_stack_remaining = stack_remaining; | |
1602 | ||
8defab1a | 1603 | status = target_read_memory (pc, buf, 4); |
e17a4113 | 1604 | inst = extract_unsigned_integer (buf, 4, byte_order); |
c5aa993b | 1605 | |
c906108c SS |
1606 | /* Yow! */ |
1607 | if (status != 0) | |
1608 | return pc; | |
1609 | ||
1610 | /* Note the interesting effects of this instruction. */ | |
1611 | stack_remaining -= prologue_inst_adjust_sp (inst); | |
1612 | ||
7be570e7 JM |
1613 | /* There are limited ways to store the return pointer into the |
1614 | stack. */ | |
c4c79048 | 1615 | if (inst == 0x6bc23fd9 || inst == 0x0fc212c1 || inst == 0x73c23fe1) |
c906108c SS |
1616 | save_rp = 0; |
1617 | ||
104c1213 | 1618 | /* These are the only ways we save SP into the stack. At this time |
dda83cd7 | 1619 | the HP compilers never bother to save SP into the stack. */ |
104c1213 JM |
1620 | if ((inst & 0xffffc000) == 0x6fc10000 |
1621 | || (inst & 0xffffc00c) == 0x73c10008) | |
c906108c SS |
1622 | save_sp = 0; |
1623 | ||
6426a772 | 1624 | /* Are we loading some register with an offset from the argument |
dda83cd7 | 1625 | pointer? */ |
6426a772 JM |
1626 | if ((inst & 0xffe00000) == 0x37a00000 |
1627 | || (inst & 0xffffffe0) == 0x081d0240) | |
1628 | { | |
1629 | pc += 4; | |
1630 | continue; | |
1631 | } | |
1632 | ||
c906108c SS |
1633 | /* Account for general and floating-point register saves. */ |
1634 | reg_num = inst_saves_gr (inst); | |
1635 | save_gr &= ~(1 << reg_num); | |
1636 | ||
1637 | /* Ugh. Also account for argument stores into the stack. | |
dda83cd7 SM |
1638 | Unfortunately args_stored only tells us that some arguments |
1639 | where stored into the stack. Not how many or what kind! | |
c906108c | 1640 | |
dda83cd7 SM |
1641 | This is a kludge as on the HP compiler sets this bit and it |
1642 | never does prologue scheduling. So once we see one, skip past | |
1643 | all of them. We have similar code for the fp arg stores below. | |
c906108c | 1644 | |
dda83cd7 SM |
1645 | FIXME. Can still die if we have a mix of GR and FR argument |
1646 | stores! */ | |
be8626e0 | 1647 | if (reg_num >= (gdbarch_ptr_bit (gdbarch) == 64 ? 19 : 23) |
819844ad | 1648 | && reg_num <= 26) |
c906108c | 1649 | { |
be8626e0 | 1650 | while (reg_num >= (gdbarch_ptr_bit (gdbarch) == 64 ? 19 : 23) |
819844ad | 1651 | && reg_num <= 26) |
c906108c SS |
1652 | { |
1653 | pc += 4; | |
8defab1a | 1654 | status = target_read_memory (pc, buf, 4); |
e17a4113 | 1655 | inst = extract_unsigned_integer (buf, 4, byte_order); |
c906108c SS |
1656 | if (status != 0) |
1657 | return pc; | |
1658 | reg_num = inst_saves_gr (inst); | |
1659 | } | |
1660 | args_stored = 0; | |
1661 | continue; | |
1662 | } | |
1663 | ||
1664 | reg_num = inst_saves_fr (inst); | |
1665 | save_fr &= ~(1 << reg_num); | |
1666 | ||
8defab1a | 1667 | status = target_read_memory (pc + 4, buf, 4); |
e17a4113 | 1668 | next_inst = extract_unsigned_integer (buf, 4, byte_order); |
c5aa993b | 1669 | |
c906108c SS |
1670 | /* Yow! */ |
1671 | if (status != 0) | |
1672 | return pc; | |
1673 | ||
1674 | /* We've got to be read to handle the ldo before the fp register | |
dda83cd7 | 1675 | save. */ |
c906108c SS |
1676 | if ((inst & 0xfc000000) == 0x34000000 |
1677 | && inst_saves_fr (next_inst) >= 4 | |
819844ad | 1678 | && inst_saves_fr (next_inst) |
be8626e0 | 1679 | <= (gdbarch_ptr_bit (gdbarch) == 64 ? 11 : 7)) |
c906108c SS |
1680 | { |
1681 | /* So we drop into the code below in a reasonable state. */ | |
1682 | reg_num = inst_saves_fr (next_inst); | |
1683 | pc -= 4; | |
1684 | } | |
1685 | ||
1686 | /* Ugh. Also account for argument stores into the stack. | |
dda83cd7 SM |
1687 | This is a kludge as on the HP compiler sets this bit and it |
1688 | never does prologue scheduling. So once we see one, skip past | |
1689 | all of them. */ | |
819844ad | 1690 | if (reg_num >= 4 |
be8626e0 | 1691 | && reg_num <= (gdbarch_ptr_bit (gdbarch) == 64 ? 11 : 7)) |
c906108c | 1692 | { |
819844ad UW |
1693 | while (reg_num >= 4 |
1694 | && reg_num | |
be8626e0 | 1695 | <= (gdbarch_ptr_bit (gdbarch) == 64 ? 11 : 7)) |
c906108c SS |
1696 | { |
1697 | pc += 8; | |
8defab1a | 1698 | status = target_read_memory (pc, buf, 4); |
e17a4113 | 1699 | inst = extract_unsigned_integer (buf, 4, byte_order); |
c906108c SS |
1700 | if (status != 0) |
1701 | return pc; | |
1702 | if ((inst & 0xfc000000) != 0x34000000) | |
1703 | break; | |
8defab1a | 1704 | status = target_read_memory (pc + 4, buf, 4); |
e17a4113 | 1705 | next_inst = extract_unsigned_integer (buf, 4, byte_order); |
c906108c SS |
1706 | if (status != 0) |
1707 | return pc; | |
1708 | reg_num = inst_saves_fr (next_inst); | |
1709 | } | |
1710 | args_stored = 0; | |
1711 | continue; | |
1712 | } | |
1713 | ||
1714 | /* Quit if we hit any kind of branch. This can happen if a prologue | |
dda83cd7 | 1715 | instruction is in the delay slot of the first call/branch. */ |
a71f8c30 | 1716 | if (is_branch (inst) && stop_before_branch) |
c906108c SS |
1717 | break; |
1718 | ||
1719 | /* What a crock. The HP compilers set args_stored even if no | |
dda83cd7 SM |
1720 | arguments were stored into the stack (boo hiss). This could |
1721 | cause this code to then skip a bunch of user insns (up to the | |
1722 | first branch). | |
1723 | ||
1724 | To combat this we try to identify when args_stored was bogusly | |
1725 | set and clear it. We only do this when args_stored is nonzero, | |
1726 | all other resources are accounted for, and nothing changed on | |
1727 | this pass. */ | |
c906108c | 1728 | if (args_stored |
c5aa993b | 1729 | && !(save_gr || save_fr || save_rp || save_sp || stack_remaining > 0) |
c906108c SS |
1730 | && old_save_gr == save_gr && old_save_fr == save_fr |
1731 | && old_save_rp == save_rp && old_save_sp == save_sp | |
1732 | && old_stack_remaining == stack_remaining) | |
1733 | break; | |
c5aa993b | 1734 | |
c906108c SS |
1735 | /* Bump the PC. */ |
1736 | pc += 4; | |
a71f8c30 RC |
1737 | |
1738 | /* !stop_before_branch, so also look at the insn in the delay slot | |
dda83cd7 | 1739 | of the branch. */ |
a71f8c30 RC |
1740 | if (final_iteration) |
1741 | break; | |
1742 | if (is_branch (inst)) | |
1743 | final_iteration = 1; | |
c906108c SS |
1744 | } |
1745 | ||
85102364 | 1746 | /* We've got a tentative location for the end of the prologue. However |
c906108c SS |
1747 | because of limitations in the unwind descriptor mechanism we may |
1748 | have went too far into user code looking for the save of a register | |
1749 | that does not exist. So, if there registers we expected to be saved | |
1750 | but never were, mask them out and restart. | |
1751 | ||
1752 | This should only happen in optimized code, and should be very rare. */ | |
c5aa993b | 1753 | if (save_gr || (save_fr && !(restart_fr || restart_gr))) |
c906108c SS |
1754 | { |
1755 | pc = orig_pc; | |
1756 | restart_gr = save_gr; | |
1757 | restart_fr = save_fr; | |
1758 | goto restart; | |
1759 | } | |
1760 | ||
1761 | return pc; | |
1762 | } | |
1763 | ||
1764 | ||
7be570e7 JM |
1765 | /* Return the address of the PC after the last prologue instruction if |
1766 | we can determine it from the debug symbols. Else return zero. */ | |
c906108c SS |
1767 | |
1768 | static CORE_ADDR | |
fba45db2 | 1769 | after_prologue (CORE_ADDR pc) |
c906108c SS |
1770 | { |
1771 | struct symtab_and_line sal; | |
1772 | CORE_ADDR func_addr, func_end; | |
c906108c | 1773 | |
7be570e7 JM |
1774 | /* If we can not find the symbol in the partial symbol table, then |
1775 | there is no hope we can determine the function's start address | |
1776 | with this code. */ | |
c906108c | 1777 | if (!find_pc_partial_function (pc, NULL, &func_addr, &func_end)) |
7be570e7 | 1778 | return 0; |
c906108c | 1779 | |
7be570e7 | 1780 | /* Get the line associated with FUNC_ADDR. */ |
c906108c SS |
1781 | sal = find_pc_line (func_addr, 0); |
1782 | ||
7be570e7 JM |
1783 | /* There are only two cases to consider. First, the end of the source line |
1784 | is within the function bounds. In that case we return the end of the | |
1785 | source line. Second is the end of the source line extends beyond the | |
1786 | bounds of the current function. We need to use the slow code to | |
1777feb0 | 1787 | examine instructions in that case. |
c906108c | 1788 | |
7be570e7 JM |
1789 | Anything else is simply a bug elsewhere. Fixing it here is absolutely |
1790 | the wrong thing to do. In fact, it should be entirely possible for this | |
1791 | function to always return zero since the slow instruction scanning code | |
1792 | is supposed to *always* work. If it does not, then it is a bug. */ | |
1793 | if (sal.end < func_end) | |
1794 | return sal.end; | |
c5aa993b | 1795 | else |
7be570e7 | 1796 | return 0; |
c906108c SS |
1797 | } |
1798 | ||
1799 | /* To skip prologues, I use this predicate. Returns either PC itself | |
1800 | if the code at PC does not look like a function prologue; otherwise | |
1777feb0 | 1801 | returns an address that (if we're lucky) follows the prologue. |
a71f8c30 RC |
1802 | |
1803 | hppa_skip_prologue is called by gdb to place a breakpoint in a function. | |
1777feb0 | 1804 | It doesn't necessarily skips all the insns in the prologue. In fact |
a71f8c30 RC |
1805 | we might not want to skip all the insns because a prologue insn may |
1806 | appear in the delay slot of the first branch, and we don't want to | |
1807 | skip over the branch in that case. */ | |
c906108c | 1808 | |
8d153463 | 1809 | static CORE_ADDR |
6093d2eb | 1810 | hppa_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc) |
c906108c | 1811 | { |
c5aa993b | 1812 | CORE_ADDR post_prologue_pc; |
c906108c | 1813 | |
c5aa993b JM |
1814 | /* See if we can determine the end of the prologue via the symbol table. |
1815 | If so, then return either PC, or the PC after the prologue, whichever | |
1816 | is greater. */ | |
c906108c | 1817 | |
c5aa993b | 1818 | post_prologue_pc = after_prologue (pc); |
c906108c | 1819 | |
7be570e7 JM |
1820 | /* If after_prologue returned a useful address, then use it. Else |
1821 | fall back on the instruction skipping code. | |
1822 | ||
1823 | Some folks have claimed this causes problems because the breakpoint | |
1824 | may be the first instruction of the prologue. If that happens, then | |
1825 | the instruction skipping code has a bug that needs to be fixed. */ | |
c5aa993b | 1826 | if (post_prologue_pc != 0) |
325fac50 | 1827 | return std::max (pc, post_prologue_pc); |
c5aa993b | 1828 | else |
be8626e0 | 1829 | return (skip_prologue_hard_way (gdbarch, pc, 1)); |
c906108c SS |
1830 | } |
1831 | ||
29d375ac | 1832 | /* Return an unwind entry that falls within the frame's code block. */ |
227e86ad | 1833 | |
29d375ac | 1834 | static struct unwind_table_entry * |
227e86ad | 1835 | hppa_find_unwind_entry_in_block (struct frame_info *this_frame) |
29d375ac | 1836 | { |
227e86ad | 1837 | CORE_ADDR pc = get_frame_address_in_block (this_frame); |
93d42b30 DJ |
1838 | |
1839 | /* FIXME drow/20070101: Calling gdbarch_addr_bits_remove on the | |
ad1193e7 | 1840 | result of get_frame_address_in_block implies a problem. |
93d42b30 | 1841 | The bits should have been removed earlier, before the return |
c7ce8faa | 1842 | value of gdbarch_unwind_pc. That might be happening already; |
93d42b30 DJ |
1843 | if it isn't, it should be fixed. Then this call can be |
1844 | removed. */ | |
227e86ad | 1845 | pc = gdbarch_addr_bits_remove (get_frame_arch (this_frame), pc); |
29d375ac RC |
1846 | return find_unwind_entry (pc); |
1847 | } | |
1848 | ||
26d08f08 AC |
1849 | struct hppa_frame_cache |
1850 | { | |
1851 | CORE_ADDR base; | |
098caef4 | 1852 | trad_frame_saved_reg *saved_regs; |
26d08f08 AC |
1853 | }; |
1854 | ||
1855 | static struct hppa_frame_cache * | |
227e86ad | 1856 | hppa_frame_cache (struct frame_info *this_frame, void **this_cache) |
26d08f08 | 1857 | { |
227e86ad | 1858 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
e17a4113 UW |
1859 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
1860 | int word_size = gdbarch_ptr_bit (gdbarch) / 8; | |
26d08f08 AC |
1861 | struct hppa_frame_cache *cache; |
1862 | long saved_gr_mask; | |
1863 | long saved_fr_mask; | |
26d08f08 AC |
1864 | long frame_size; |
1865 | struct unwind_table_entry *u; | |
9f7194c3 | 1866 | CORE_ADDR prologue_end; |
50b2f48a | 1867 | int fp_in_r1 = 0; |
26d08f08 AC |
1868 | int i; |
1869 | ||
369aa520 RC |
1870 | if (hppa_debug) |
1871 | fprintf_unfiltered (gdb_stdlog, "{ hppa_frame_cache (frame=%d) -> ", | |
227e86ad | 1872 | frame_relative_level(this_frame)); |
369aa520 | 1873 | |
26d08f08 | 1874 | if ((*this_cache) != NULL) |
369aa520 RC |
1875 | { |
1876 | if (hppa_debug) | |
dda83cd7 SM |
1877 | fprintf_unfiltered (gdb_stdlog, "base=%s (cached) }", |
1878 | paddress (gdbarch, ((struct hppa_frame_cache *)*this_cache)->base)); | |
9a3c8263 | 1879 | return (struct hppa_frame_cache *) (*this_cache); |
369aa520 | 1880 | } |
26d08f08 AC |
1881 | cache = FRAME_OBSTACK_ZALLOC (struct hppa_frame_cache); |
1882 | (*this_cache) = cache; | |
227e86ad | 1883 | cache->saved_regs = trad_frame_alloc_saved_regs (this_frame); |
26d08f08 AC |
1884 | |
1885 | /* Yow! */ | |
227e86ad | 1886 | u = hppa_find_unwind_entry_in_block (this_frame); |
26d08f08 | 1887 | if (!u) |
369aa520 RC |
1888 | { |
1889 | if (hppa_debug) | |
dda83cd7 | 1890 | fprintf_unfiltered (gdb_stdlog, "base=NULL (no unwind entry) }"); |
9a3c8263 | 1891 | return (struct hppa_frame_cache *) (*this_cache); |
369aa520 | 1892 | } |
26d08f08 AC |
1893 | |
1894 | /* Turn the Entry_GR field into a bitmask. */ | |
1895 | saved_gr_mask = 0; | |
1896 | for (i = 3; i < u->Entry_GR + 3; i++) | |
1897 | { | |
1898 | /* Frame pointer gets saved into a special location. */ | |
eded0a31 | 1899 | if (u->Save_SP && i == HPPA_FP_REGNUM) |
26d08f08 AC |
1900 | continue; |
1901 | ||
1902 | saved_gr_mask |= (1 << i); | |
1903 | } | |
1904 | ||
1905 | /* Turn the Entry_FR field into a bitmask too. */ | |
1906 | saved_fr_mask = 0; | |
1907 | for (i = 12; i < u->Entry_FR + 12; i++) | |
1908 | saved_fr_mask |= (1 << i); | |
1909 | ||
1910 | /* Loop until we find everything of interest or hit a branch. | |
1911 | ||
1912 | For unoptimized GCC code and for any HP CC code this will never ever | |
1913 | examine any user instructions. | |
1914 | ||
1915 | For optimized GCC code we're faced with problems. GCC will schedule | |
1916 | its prologue and make prologue instructions available for delay slot | |
1917 | filling. The end result is user code gets mixed in with the prologue | |
1918 | and a prologue instruction may be in the delay slot of the first branch | |
1919 | or call. | |
1920 | ||
1921 | Some unexpected things are expected with debugging optimized code, so | |
1922 | we allow this routine to walk past user instructions in optimized | |
1923 | GCC code. */ | |
1924 | { | |
1925 | int final_iteration = 0; | |
46acf081 | 1926 | CORE_ADDR pc, start_pc, end_pc; |
26d08f08 AC |
1927 | int looking_for_sp = u->Save_SP; |
1928 | int looking_for_rp = u->Save_RP; | |
1929 | int fp_loc = -1; | |
9f7194c3 | 1930 | |
a71f8c30 | 1931 | /* We have to use skip_prologue_hard_way instead of just |
9f7194c3 RC |
1932 | skip_prologue_using_sal, in case we stepped into a function without |
1933 | symbol information. hppa_skip_prologue also bounds the returned | |
1934 | pc by the passed in pc, so it will not return a pc in the next | |
1777feb0 | 1935 | function. |
a71f8c30 RC |
1936 | |
1937 | We used to call hppa_skip_prologue to find the end of the prologue, | |
1938 | but if some non-prologue instructions get scheduled into the prologue, | |
1939 | and the program is compiled with debug information, the "easy" way | |
1940 | in hppa_skip_prologue will return a prologue end that is too early | |
1941 | for us to notice any potential frame adjustments. */ | |
d5c27f81 | 1942 | |
ef02daa9 DJ |
1943 | /* We used to use get_frame_func to locate the beginning of the |
1944 | function to pass to skip_prologue. However, when objects are | |
1945 | compiled without debug symbols, get_frame_func can return the wrong | |
1777feb0 | 1946 | function (or 0). We can do better than that by using unwind records. |
46acf081 | 1947 | This only works if the Region_description of the unwind record |
1777feb0 | 1948 | indicates that it includes the entry point of the function. |
46acf081 RC |
1949 | HP compilers sometimes generate unwind records for regions that |
1950 | do not include the entry or exit point of a function. GNU tools | |
1951 | do not do this. */ | |
1952 | ||
1953 | if ((u->Region_description & 0x2) == 0) | |
1954 | start_pc = u->region_start; | |
1955 | else | |
227e86ad | 1956 | start_pc = get_frame_func (this_frame); |
d5c27f81 | 1957 | |
be8626e0 | 1958 | prologue_end = skip_prologue_hard_way (gdbarch, start_pc, 0); |
227e86ad | 1959 | end_pc = get_frame_pc (this_frame); |
9f7194c3 RC |
1960 | |
1961 | if (prologue_end != 0 && end_pc > prologue_end) | |
1962 | end_pc = prologue_end; | |
1963 | ||
26d08f08 | 1964 | frame_size = 0; |
9f7194c3 | 1965 | |
46acf081 | 1966 | for (pc = start_pc; |
26d08f08 AC |
1967 | ((saved_gr_mask || saved_fr_mask |
1968 | || looking_for_sp || looking_for_rp | |
1969 | || frame_size < (u->Total_frame_size << 3)) | |
9f7194c3 | 1970 | && pc < end_pc); |
26d08f08 AC |
1971 | pc += 4) |
1972 | { | |
1973 | int reg; | |
e362b510 | 1974 | gdb_byte buf4[4]; |
4a302917 RC |
1975 | long inst; |
1976 | ||
bdec2917 | 1977 | if (!safe_frame_unwind_memory (this_frame, pc, buf4)) |
4a302917 | 1978 | { |
5af949e3 UW |
1979 | error (_("Cannot read instruction at %s."), |
1980 | paddress (gdbarch, pc)); | |
9a3c8263 | 1981 | return (struct hppa_frame_cache *) (*this_cache); |
4a302917 RC |
1982 | } |
1983 | ||
e17a4113 | 1984 | inst = extract_unsigned_integer (buf4, sizeof buf4, byte_order); |
9f7194c3 | 1985 | |
26d08f08 AC |
1986 | /* Note the interesting effects of this instruction. */ |
1987 | frame_size += prologue_inst_adjust_sp (inst); | |
1988 | ||
1989 | /* There are limited ways to store the return pointer into the | |
1990 | stack. */ | |
1991 | if (inst == 0x6bc23fd9) /* stw rp,-0x14(sr0,sp) */ | |
1992 | { | |
1993 | looking_for_rp = 0; | |
098caef4 | 1994 | cache->saved_regs[HPPA_RP_REGNUM].set_addr (-20); |
26d08f08 | 1995 | } |
dfaf8edb MK |
1996 | else if (inst == 0x6bc23fd1) /* stw rp,-0x18(sr0,sp) */ |
1997 | { | |
1998 | looking_for_rp = 0; | |
098caef4 | 1999 | cache->saved_regs[HPPA_RP_REGNUM].set_addr (-24); |
dfaf8edb | 2000 | } |
c4c79048 | 2001 | else if (inst == 0x0fc212c1 |
dda83cd7 | 2002 | || inst == 0x73c23fe1) /* std rp,-0x10(sr0,sp) */ |
26d08f08 AC |
2003 | { |
2004 | looking_for_rp = 0; | |
098caef4 | 2005 | cache->saved_regs[HPPA_RP_REGNUM].set_addr (-16); |
26d08f08 AC |
2006 | } |
2007 | ||
2008 | /* Check to see if we saved SP into the stack. This also | |
2009 | happens to indicate the location of the saved frame | |
2010 | pointer. */ | |
2011 | if ((inst & 0xffffc000) == 0x6fc10000 /* stw,ma r1,N(sr0,sp) */ | |
2012 | || (inst & 0xffffc00c) == 0x73c10008) /* std,ma r1,N(sr0,sp) */ | |
2013 | { | |
2014 | looking_for_sp = 0; | |
098caef4 | 2015 | cache->saved_regs[HPPA_FP_REGNUM].set_addr (0); |
26d08f08 | 2016 | } |
50b2f48a RC |
2017 | else if (inst == 0x08030241) /* copy %r3, %r1 */ |
2018 | { | |
2019 | fp_in_r1 = 1; | |
2020 | } | |
26d08f08 AC |
2021 | |
2022 | /* Account for general and floating-point register saves. */ | |
2023 | reg = inst_saves_gr (inst); | |
2024 | if (reg >= 3 && reg <= 18 | |
eded0a31 | 2025 | && (!u->Save_SP || reg != HPPA_FP_REGNUM)) |
26d08f08 AC |
2026 | { |
2027 | saved_gr_mask &= ~(1 << reg); | |
abc485a1 | 2028 | if ((inst >> 26) == 0x1b && hppa_extract_14 (inst) >= 0) |
26d08f08 AC |
2029 | /* stwm with a positive displacement is a _post_ |
2030 | _modify_. */ | |
098caef4 | 2031 | cache->saved_regs[reg].set_addr (0); |
26d08f08 AC |
2032 | else if ((inst & 0xfc00000c) == 0x70000008) |
2033 | /* A std has explicit post_modify forms. */ | |
098caef4 | 2034 | cache->saved_regs[reg].set_addr (0); |
26d08f08 AC |
2035 | else |
2036 | { | |
2037 | CORE_ADDR offset; | |
2038 | ||
2039 | if ((inst >> 26) == 0x1c) | |
66c6502d | 2040 | offset = (inst & 0x1 ? -(1 << 13) : 0) |
1777feb0 | 2041 | | (((inst >> 4) & 0x3ff) << 3); |
26d08f08 | 2042 | else if ((inst >> 26) == 0x03) |
abc485a1 | 2043 | offset = hppa_low_hppa_sign_extend (inst & 0x1f, 5); |
26d08f08 | 2044 | else |
abc485a1 | 2045 | offset = hppa_extract_14 (inst); |
26d08f08 AC |
2046 | |
2047 | /* Handle code with and without frame pointers. */ | |
2048 | if (u->Save_SP) | |
098caef4 | 2049 | cache->saved_regs[reg].set_addr (offset); |
26d08f08 | 2050 | else |
098caef4 LM |
2051 | cache->saved_regs[reg].set_addr ((u->Total_frame_size << 3) |
2052 | + offset); | |
26d08f08 AC |
2053 | } |
2054 | } | |
2055 | ||
2056 | /* GCC handles callee saved FP regs a little differently. | |
2057 | ||
2058 | It emits an instruction to put the value of the start of | |
2059 | the FP store area into %r1. It then uses fstds,ma with a | |
2060 | basereg of %r1 for the stores. | |
2061 | ||
2062 | HP CC emits them at the current stack pointer modifying the | |
2063 | stack pointer as it stores each register. */ | |
2064 | ||
2065 | /* ldo X(%r3),%r1 or ldo X(%r30),%r1. */ | |
2066 | if ((inst & 0xffffc000) == 0x34610000 | |
2067 | || (inst & 0xffffc000) == 0x37c10000) | |
abc485a1 | 2068 | fp_loc = hppa_extract_14 (inst); |
26d08f08 AC |
2069 | |
2070 | reg = inst_saves_fr (inst); | |
2071 | if (reg >= 12 && reg <= 21) | |
2072 | { | |
2073 | /* Note +4 braindamage below is necessary because the FP | |
2074 | status registers are internally 8 registers rather than | |
2075 | the expected 4 registers. */ | |
2076 | saved_fr_mask &= ~(1 << reg); | |
2077 | if (fp_loc == -1) | |
2078 | { | |
2079 | /* 1st HP CC FP register store. After this | |
2080 | instruction we've set enough state that the GCC and | |
2081 | HPCC code are both handled in the same manner. */ | |
098caef4 | 2082 | cache->saved_regs[reg + HPPA_FP4_REGNUM + 4].set_addr (0); |
26d08f08 AC |
2083 | fp_loc = 8; |
2084 | } | |
2085 | else | |
2086 | { | |
098caef4 | 2087 | cache->saved_regs[reg + HPPA_FP0_REGNUM + 4].set_addr (fp_loc); |
26d08f08 AC |
2088 | fp_loc += 8; |
2089 | } | |
2090 | } | |
2091 | ||
1777feb0 | 2092 | /* Quit if we hit any kind of branch the previous iteration. */ |
26d08f08 AC |
2093 | if (final_iteration) |
2094 | break; | |
2095 | /* We want to look precisely one instruction beyond the branch | |
2096 | if we have not found everything yet. */ | |
2097 | if (is_branch (inst)) | |
2098 | final_iteration = 1; | |
2099 | } | |
2100 | } | |
2101 | ||
2102 | { | |
2103 | /* The frame base always represents the value of %sp at entry to | |
2104 | the current function (and is thus equivalent to the "saved" | |
2105 | stack pointer. */ | |
227e86ad | 2106 | CORE_ADDR this_sp = get_frame_register_unsigned (this_frame, |
dda83cd7 | 2107 | HPPA_SP_REGNUM); |
ed70ba00 | 2108 | CORE_ADDR fp; |
9f7194c3 RC |
2109 | |
2110 | if (hppa_debug) | |
5af949e3 | 2111 | fprintf_unfiltered (gdb_stdlog, " (this_sp=%s, pc=%s, " |
dda83cd7 SM |
2112 | "prologue_end=%s) ", |
2113 | paddress (gdbarch, this_sp), | |
5af949e3 UW |
2114 | paddress (gdbarch, get_frame_pc (this_frame)), |
2115 | paddress (gdbarch, prologue_end)); | |
9f7194c3 | 2116 | |
ed70ba00 | 2117 | /* Check to see if a frame pointer is available, and use it for |
dda83cd7 | 2118 | frame unwinding if it is. |
ed70ba00 | 2119 | |
dda83cd7 SM |
2120 | There are some situations where we need to rely on the frame |
2121 | pointer to do stack unwinding. For example, if a function calls | |
2122 | alloca (), the stack pointer can get adjusted inside the body of | |
2123 | the function. In this case, the ABI requires that the compiler | |
2124 | maintain a frame pointer for the function. | |
ed70ba00 | 2125 | |
dda83cd7 SM |
2126 | The unwind record has a flag (alloca_frame) that indicates that |
2127 | a function has a variable frame; unfortunately, gcc/binutils | |
2128 | does not set this flag. Instead, whenever a frame pointer is used | |
2129 | and saved on the stack, the Save_SP flag is set. We use this to | |
2130 | decide whether to use the frame pointer for unwinding. | |
ed70ba00 | 2131 | |
dda83cd7 | 2132 | TODO: For the HP compiler, maybe we should use the alloca_frame flag |
ed70ba00 RC |
2133 | instead of Save_SP. */ |
2134 | ||
227e86ad | 2135 | fp = get_frame_register_unsigned (this_frame, HPPA_FP_REGNUM); |
46acf081 | 2136 | |
6fcecea0 | 2137 | if (u->alloca_frame) |
46acf081 | 2138 | fp -= u->Total_frame_size << 3; |
ed70ba00 | 2139 | |
227e86ad | 2140 | if (get_frame_pc (this_frame) >= prologue_end |
dda83cd7 | 2141 | && (u->Save_SP || u->alloca_frame) && fp != 0) |
ed70ba00 | 2142 | { |
24b21115 | 2143 | cache->base = fp; |
ed70ba00 | 2144 | |
24b21115 | 2145 | if (hppa_debug) |
5af949e3 UW |
2146 | fprintf_unfiltered (gdb_stdlog, " (base=%s) [frame pointer]", |
2147 | paddress (gdbarch, cache->base)); | |
ed70ba00 | 2148 | } |
1658da49 | 2149 | else if (u->Save_SP |
a9a87d35 | 2150 | && cache->saved_regs[HPPA_SP_REGNUM].is_addr ()) |
9f7194c3 | 2151 | { |
dda83cd7 | 2152 | /* Both we're expecting the SP to be saved and the SP has been |
9f7194c3 RC |
2153 | saved. The entry SP value is saved at this frame's SP |
2154 | address. */ | |
dda83cd7 | 2155 | cache->base = read_memory_integer (this_sp, word_size, byte_order); |
9f7194c3 RC |
2156 | |
2157 | if (hppa_debug) | |
5af949e3 | 2158 | fprintf_unfiltered (gdb_stdlog, " (base=%s) [saved]", |
dda83cd7 | 2159 | paddress (gdbarch, cache->base)); |
9f7194c3 | 2160 | } |
492325c4 | 2161 | else |
9f7194c3 | 2162 | { |
dda83cd7 | 2163 | /* The prologue has been slowly allocating stack space. Adjust |
1658da49 | 2164 | the SP back. */ |
dda83cd7 | 2165 | cache->base = this_sp - frame_size; |
9f7194c3 | 2166 | if (hppa_debug) |
5af949e3 UW |
2167 | fprintf_unfiltered (gdb_stdlog, " (base=%s) [unwind adjust]", |
2168 | paddress (gdbarch, cache->base)); | |
9f7194c3 RC |
2169 | |
2170 | } | |
a9a87d35 | 2171 | cache->saved_regs[HPPA_SP_REGNUM].set_value (cache->base); |
26d08f08 AC |
2172 | } |
2173 | ||
412275d5 AC |
2174 | /* The PC is found in the "return register", "Millicode" uses "r31" |
2175 | as the return register while normal code uses "rp". */ | |
26d08f08 | 2176 | if (u->Millicode) |
9f7194c3 | 2177 | { |
a9a87d35 | 2178 | if (cache->saved_regs[31].is_addr ()) |
dda83cd7 SM |
2179 | { |
2180 | cache->saved_regs[HPPA_PCOQ_HEAD_REGNUM] = cache->saved_regs[31]; | |
9ed5ba24 RC |
2181 | if (hppa_debug) |
2182 | fprintf_unfiltered (gdb_stdlog, " (pc=r31) [stack] } "); | |
dda83cd7 | 2183 | } |
9f7194c3 RC |
2184 | else |
2185 | { | |
227e86ad | 2186 | ULONGEST r31 = get_frame_register_unsigned (this_frame, 31); |
a9a87d35 | 2187 | cache->saved_regs[HPPA_PCOQ_HEAD_REGNUM].set_value (r31); |
9ed5ba24 RC |
2188 | if (hppa_debug) |
2189 | fprintf_unfiltered (gdb_stdlog, " (pc=r31) [frame] } "); | |
dda83cd7 | 2190 | } |
9f7194c3 | 2191 | } |
26d08f08 | 2192 | else |
9f7194c3 | 2193 | { |
a9a87d35 | 2194 | if (cache->saved_regs[HPPA_RP_REGNUM].is_addr ()) |
dda83cd7 SM |
2195 | { |
2196 | cache->saved_regs[HPPA_PCOQ_HEAD_REGNUM] = | |
9ed5ba24 RC |
2197 | cache->saved_regs[HPPA_RP_REGNUM]; |
2198 | if (hppa_debug) | |
2199 | fprintf_unfiltered (gdb_stdlog, " (pc=rp) [stack] } "); | |
dda83cd7 | 2200 | } |
9f7194c3 RC |
2201 | else |
2202 | { | |
227e86ad | 2203 | ULONGEST rp = get_frame_register_unsigned (this_frame, |
dda83cd7 | 2204 | HPPA_RP_REGNUM); |
a9a87d35 | 2205 | cache->saved_regs[HPPA_PCOQ_HEAD_REGNUM].set_value (rp); |
9ed5ba24 RC |
2206 | if (hppa_debug) |
2207 | fprintf_unfiltered (gdb_stdlog, " (pc=rp) [frame] } "); | |
9f7194c3 RC |
2208 | } |
2209 | } | |
26d08f08 | 2210 | |
50b2f48a RC |
2211 | /* If Save_SP is set, then we expect the frame pointer to be saved in the |
2212 | frame. However, there is a one-insn window where we haven't saved it | |
2213 | yet, but we've already clobbered it. Detect this case and fix it up. | |
2214 | ||
2215 | The prologue sequence for frame-pointer functions is: | |
2216 | 0: stw %rp, -20(%sp) | |
2217 | 4: copy %r3, %r1 | |
2218 | 8: copy %sp, %r3 | |
2219 | c: stw,ma %r1, XX(%sp) | |
2220 | ||
2221 | So if we are at offset c, the r3 value that we want is not yet saved | |
2222 | on the stack, but it's been overwritten. The prologue analyzer will | |
2223 | set fp_in_r1 when it sees the copy insn so we know to get the value | |
2224 | from r1 instead. */ | |
a9a87d35 | 2225 | if (u->Save_SP && !cache->saved_regs[HPPA_FP_REGNUM].is_addr () |
50b2f48a RC |
2226 | && fp_in_r1) |
2227 | { | |
227e86ad | 2228 | ULONGEST r1 = get_frame_register_unsigned (this_frame, 1); |
a9a87d35 | 2229 | cache->saved_regs[HPPA_FP_REGNUM].set_value (r1); |
50b2f48a | 2230 | } |
1658da49 | 2231 | |
26d08f08 AC |
2232 | { |
2233 | /* Convert all the offsets into addresses. */ | |
2234 | int reg; | |
65c5db89 | 2235 | for (reg = 0; reg < gdbarch_num_regs (gdbarch); reg++) |
26d08f08 | 2236 | { |
a9a87d35 | 2237 | if (cache->saved_regs[reg].is_addr ()) |
098caef4 LM |
2238 | cache->saved_regs[reg].set_addr (cache->saved_regs[reg].addr () |
2239 | + cache->base); | |
26d08f08 AC |
2240 | } |
2241 | } | |
2242 | ||
f77a2124 | 2243 | { |
345bd07c | 2244 | hppa_gdbarch_tdep *tdep = (hppa_gdbarch_tdep *) gdbarch_tdep (gdbarch); |
f77a2124 RC |
2245 | |
2246 | if (tdep->unwind_adjust_stub) | |
227e86ad | 2247 | tdep->unwind_adjust_stub (this_frame, cache->base, cache->saved_regs); |
f77a2124 RC |
2248 | } |
2249 | ||
369aa520 | 2250 | if (hppa_debug) |
5af949e3 UW |
2251 | fprintf_unfiltered (gdb_stdlog, "base=%s }", |
2252 | paddress (gdbarch, ((struct hppa_frame_cache *)*this_cache)->base)); | |
9a3c8263 | 2253 | return (struct hppa_frame_cache *) (*this_cache); |
26d08f08 AC |
2254 | } |
2255 | ||
2256 | static void | |
227e86ad JB |
2257 | hppa_frame_this_id (struct frame_info *this_frame, void **this_cache, |
2258 | struct frame_id *this_id) | |
26d08f08 | 2259 | { |
d5c27f81 | 2260 | struct hppa_frame_cache *info; |
d5c27f81 RC |
2261 | struct unwind_table_entry *u; |
2262 | ||
227e86ad JB |
2263 | info = hppa_frame_cache (this_frame, this_cache); |
2264 | u = hppa_find_unwind_entry_in_block (this_frame); | |
d5c27f81 RC |
2265 | |
2266 | (*this_id) = frame_id_build (info->base, u->region_start); | |
26d08f08 AC |
2267 | } |
2268 | ||
227e86ad JB |
2269 | static struct value * |
2270 | hppa_frame_prev_register (struct frame_info *this_frame, | |
2271 | void **this_cache, int regnum) | |
26d08f08 | 2272 | { |
227e86ad JB |
2273 | struct hppa_frame_cache *info = hppa_frame_cache (this_frame, this_cache); |
2274 | ||
1777feb0 MS |
2275 | return hppa_frame_prev_register_helper (this_frame, |
2276 | info->saved_regs, regnum); | |
227e86ad JB |
2277 | } |
2278 | ||
2279 | static int | |
2280 | hppa_frame_unwind_sniffer (const struct frame_unwind *self, | |
dda83cd7 | 2281 | struct frame_info *this_frame, void **this_cache) |
227e86ad JB |
2282 | { |
2283 | if (hppa_find_unwind_entry_in_block (this_frame)) | |
2284 | return 1; | |
2285 | ||
2286 | return 0; | |
0da28f8a RC |
2287 | } |
2288 | ||
2289 | static const struct frame_unwind hppa_frame_unwind = | |
2290 | { | |
a154d838 | 2291 | "hppa unwind table", |
0da28f8a | 2292 | NORMAL_FRAME, |
8fbca658 | 2293 | default_frame_unwind_stop_reason, |
0da28f8a | 2294 | hppa_frame_this_id, |
227e86ad JB |
2295 | hppa_frame_prev_register, |
2296 | NULL, | |
2297 | hppa_frame_unwind_sniffer | |
0da28f8a RC |
2298 | }; |
2299 | ||
0da28f8a RC |
2300 | /* This is a generic fallback frame unwinder that kicks in if we fail all |
2301 | the other ones. Normally we would expect the stub and regular unwinder | |
2302 | to work, but in some cases we might hit a function that just doesn't | |
2303 | have any unwind information available. In this case we try to do | |
2304 | unwinding solely based on code reading. This is obviously going to be | |
2305 | slow, so only use this as a last resort. Currently this will only | |
2306 | identify the stack and pc for the frame. */ | |
2307 | ||
2308 | static struct hppa_frame_cache * | |
227e86ad | 2309 | hppa_fallback_frame_cache (struct frame_info *this_frame, void **this_cache) |
0da28f8a | 2310 | { |
e17a4113 UW |
2311 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
2312 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
0da28f8a | 2313 | struct hppa_frame_cache *cache; |
4ba6a975 MK |
2314 | unsigned int frame_size = 0; |
2315 | int found_rp = 0; | |
2316 | CORE_ADDR start_pc; | |
0da28f8a | 2317 | |
d5c27f81 | 2318 | if (hppa_debug) |
4ba6a975 MK |
2319 | fprintf_unfiltered (gdb_stdlog, |
2320 | "{ hppa_fallback_frame_cache (frame=%d) -> ", | |
227e86ad | 2321 | frame_relative_level (this_frame)); |
d5c27f81 | 2322 | |
0da28f8a RC |
2323 | cache = FRAME_OBSTACK_ZALLOC (struct hppa_frame_cache); |
2324 | (*this_cache) = cache; | |
227e86ad | 2325 | cache->saved_regs = trad_frame_alloc_saved_regs (this_frame); |
0da28f8a | 2326 | |
227e86ad | 2327 | start_pc = get_frame_func (this_frame); |
4ba6a975 | 2328 | if (start_pc) |
0da28f8a | 2329 | { |
227e86ad | 2330 | CORE_ADDR cur_pc = get_frame_pc (this_frame); |
4ba6a975 | 2331 | CORE_ADDR pc; |
0da28f8a | 2332 | |
4ba6a975 MK |
2333 | for (pc = start_pc; pc < cur_pc; pc += 4) |
2334 | { | |
2335 | unsigned int insn; | |
0da28f8a | 2336 | |
e17a4113 | 2337 | insn = read_memory_unsigned_integer (pc, 4, byte_order); |
4ba6a975 | 2338 | frame_size += prologue_inst_adjust_sp (insn); |
6d1be3f1 | 2339 | |
4ba6a975 MK |
2340 | /* There are limited ways to store the return pointer into the |
2341 | stack. */ | |
2342 | if (insn == 0x6bc23fd9) /* stw rp,-0x14(sr0,sp) */ | |
2343 | { | |
098caef4 | 2344 | cache->saved_regs[HPPA_RP_REGNUM].set_addr (-20); |
4ba6a975 MK |
2345 | found_rp = 1; |
2346 | } | |
c4c79048 | 2347 | else if (insn == 0x0fc212c1 |
dda83cd7 | 2348 | || insn == 0x73c23fe1) /* std rp,-0x10(sr0,sp) */ |
4ba6a975 | 2349 | { |
098caef4 | 2350 | cache->saved_regs[HPPA_RP_REGNUM].set_addr (-16); |
4ba6a975 MK |
2351 | found_rp = 1; |
2352 | } | |
2353 | } | |
412275d5 | 2354 | } |
0da28f8a | 2355 | |
d5c27f81 | 2356 | if (hppa_debug) |
4ba6a975 MK |
2357 | fprintf_unfiltered (gdb_stdlog, " frame_size=%d, found_rp=%d }\n", |
2358 | frame_size, found_rp); | |
d5c27f81 | 2359 | |
227e86ad | 2360 | cache->base = get_frame_register_unsigned (this_frame, HPPA_SP_REGNUM); |
4ba6a975 | 2361 | cache->base -= frame_size; |
a9a87d35 | 2362 | cache->saved_regs[HPPA_SP_REGNUM].set_value (cache->base); |
0da28f8a | 2363 | |
a9a87d35 | 2364 | if (cache->saved_regs[HPPA_RP_REGNUM].is_addr ()) |
0da28f8a | 2365 | { |
098caef4 LM |
2366 | cache->saved_regs[HPPA_RP_REGNUM].set_addr (cache->saved_regs[HPPA_RP_REGNUM].addr () |
2367 | + cache->base); | |
4ba6a975 MK |
2368 | cache->saved_regs[HPPA_PCOQ_HEAD_REGNUM] = |
2369 | cache->saved_regs[HPPA_RP_REGNUM]; | |
0da28f8a | 2370 | } |
412275d5 AC |
2371 | else |
2372 | { | |
4ba6a975 | 2373 | ULONGEST rp; |
227e86ad | 2374 | rp = get_frame_register_unsigned (this_frame, HPPA_RP_REGNUM); |
a9a87d35 | 2375 | cache->saved_regs[HPPA_PCOQ_HEAD_REGNUM].set_value (rp); |
412275d5 | 2376 | } |
0da28f8a RC |
2377 | |
2378 | return cache; | |
26d08f08 AC |
2379 | } |
2380 | ||
0da28f8a | 2381 | static void |
227e86ad | 2382 | hppa_fallback_frame_this_id (struct frame_info *this_frame, void **this_cache, |
0da28f8a RC |
2383 | struct frame_id *this_id) |
2384 | { | |
2385 | struct hppa_frame_cache *info = | |
227e86ad JB |
2386 | hppa_fallback_frame_cache (this_frame, this_cache); |
2387 | ||
2388 | (*this_id) = frame_id_build (info->base, get_frame_func (this_frame)); | |
0da28f8a RC |
2389 | } |
2390 | ||
227e86ad JB |
2391 | static struct value * |
2392 | hppa_fallback_frame_prev_register (struct frame_info *this_frame, | |
dda83cd7 | 2393 | void **this_cache, int regnum) |
0da28f8a | 2394 | { |
1777feb0 MS |
2395 | struct hppa_frame_cache *info |
2396 | = hppa_fallback_frame_cache (this_frame, this_cache); | |
227e86ad | 2397 | |
1777feb0 MS |
2398 | return hppa_frame_prev_register_helper (this_frame, |
2399 | info->saved_regs, regnum); | |
0da28f8a RC |
2400 | } |
2401 | ||
2402 | static const struct frame_unwind hppa_fallback_frame_unwind = | |
26d08f08 | 2403 | { |
a154d838 | 2404 | "hppa prologue", |
26d08f08 | 2405 | NORMAL_FRAME, |
8fbca658 | 2406 | default_frame_unwind_stop_reason, |
0da28f8a | 2407 | hppa_fallback_frame_this_id, |
227e86ad JB |
2408 | hppa_fallback_frame_prev_register, |
2409 | NULL, | |
2410 | default_frame_sniffer | |
26d08f08 AC |
2411 | }; |
2412 | ||
7f07c5b6 RC |
2413 | /* Stub frames, used for all kinds of call stubs. */ |
2414 | struct hppa_stub_unwind_cache | |
2415 | { | |
2416 | CORE_ADDR base; | |
098caef4 | 2417 | trad_frame_saved_reg *saved_regs; |
7f07c5b6 RC |
2418 | }; |
2419 | ||
2420 | static struct hppa_stub_unwind_cache * | |
227e86ad | 2421 | hppa_stub_frame_unwind_cache (struct frame_info *this_frame, |
7f07c5b6 RC |
2422 | void **this_cache) |
2423 | { | |
7f07c5b6 RC |
2424 | struct hppa_stub_unwind_cache *info; |
2425 | ||
2426 | if (*this_cache) | |
9a3c8263 | 2427 | return (struct hppa_stub_unwind_cache *) *this_cache; |
7f07c5b6 RC |
2428 | |
2429 | info = FRAME_OBSTACK_ZALLOC (struct hppa_stub_unwind_cache); | |
2430 | *this_cache = info; | |
227e86ad | 2431 | info->saved_regs = trad_frame_alloc_saved_regs (this_frame); |
7f07c5b6 | 2432 | |
227e86ad | 2433 | info->base = get_frame_register_unsigned (this_frame, HPPA_SP_REGNUM); |
7f07c5b6 | 2434 | |
22b0923d | 2435 | /* By default we assume that stubs do not change the rp. */ |
098caef4 | 2436 | info->saved_regs[HPPA_PCOQ_HEAD_REGNUM].set_realreg (HPPA_RP_REGNUM); |
22b0923d | 2437 | |
7f07c5b6 RC |
2438 | return info; |
2439 | } | |
2440 | ||
2441 | static void | |
227e86ad | 2442 | hppa_stub_frame_this_id (struct frame_info *this_frame, |
7f07c5b6 RC |
2443 | void **this_prologue_cache, |
2444 | struct frame_id *this_id) | |
2445 | { | |
2446 | struct hppa_stub_unwind_cache *info | |
227e86ad | 2447 | = hppa_stub_frame_unwind_cache (this_frame, this_prologue_cache); |
f1b38a57 RC |
2448 | |
2449 | if (info) | |
227e86ad | 2450 | *this_id = frame_id_build (info->base, get_frame_func (this_frame)); |
7f07c5b6 RC |
2451 | } |
2452 | ||
227e86ad JB |
2453 | static struct value * |
2454 | hppa_stub_frame_prev_register (struct frame_info *this_frame, | |
2455 | void **this_prologue_cache, int regnum) | |
7f07c5b6 RC |
2456 | { |
2457 | struct hppa_stub_unwind_cache *info | |
227e86ad | 2458 | = hppa_stub_frame_unwind_cache (this_frame, this_prologue_cache); |
f1b38a57 | 2459 | |
227e86ad | 2460 | if (info == NULL) |
8a3fe4f8 | 2461 | error (_("Requesting registers from null frame.")); |
7f07c5b6 | 2462 | |
1777feb0 MS |
2463 | return hppa_frame_prev_register_helper (this_frame, |
2464 | info->saved_regs, regnum); | |
227e86ad | 2465 | } |
7f07c5b6 | 2466 | |
227e86ad JB |
2467 | static int |
2468 | hppa_stub_unwind_sniffer (const struct frame_unwind *self, | |
dda83cd7 SM |
2469 | struct frame_info *this_frame, |
2470 | void **this_cache) | |
7f07c5b6 | 2471 | { |
227e86ad JB |
2472 | CORE_ADDR pc = get_frame_address_in_block (this_frame); |
2473 | struct gdbarch *gdbarch = get_frame_arch (this_frame); | |
345bd07c | 2474 | hppa_gdbarch_tdep *tdep = (hppa_gdbarch_tdep *) gdbarch_tdep (gdbarch); |
7f07c5b6 | 2475 | |
6d1be3f1 | 2476 | if (pc == 0 |
84674fe1 | 2477 | || (tdep->in_solib_call_trampoline != NULL |
3e5d3a5a | 2478 | && tdep->in_solib_call_trampoline (gdbarch, pc)) |
464963c9 | 2479 | || gdbarch_in_solib_return_trampoline (gdbarch, pc, NULL)) |
227e86ad JB |
2480 | return 1; |
2481 | return 0; | |
7f07c5b6 RC |
2482 | } |
2483 | ||
227e86ad | 2484 | static const struct frame_unwind hppa_stub_frame_unwind = { |
a154d838 | 2485 | "hppa stub", |
227e86ad | 2486 | NORMAL_FRAME, |
8fbca658 | 2487 | default_frame_unwind_stop_reason, |
227e86ad JB |
2488 | hppa_stub_frame_this_id, |
2489 | hppa_stub_frame_prev_register, | |
2490 | NULL, | |
2491 | hppa_stub_unwind_sniffer | |
2492 | }; | |
2493 | ||
cc72850f | 2494 | CORE_ADDR |
26d08f08 AC |
2495 | hppa_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame) |
2496 | { | |
fe46cd3a RC |
2497 | ULONGEST ipsw; |
2498 | CORE_ADDR pc; | |
2499 | ||
cc72850f MK |
2500 | ipsw = frame_unwind_register_unsigned (next_frame, HPPA_IPSW_REGNUM); |
2501 | pc = frame_unwind_register_unsigned (next_frame, HPPA_PCOQ_HEAD_REGNUM); | |
fe46cd3a RC |
2502 | |
2503 | /* If the current instruction is nullified, then we are effectively | |
2504 | still executing the previous instruction. Pretend we are still | |
cc72850f MK |
2505 | there. This is needed when single stepping; if the nullified |
2506 | instruction is on a different line, we don't want GDB to think | |
2507 | we've stepped onto that line. */ | |
fe46cd3a RC |
2508 | if (ipsw & 0x00200000) |
2509 | pc -= 4; | |
2510 | ||
cc72850f | 2511 | return pc & ~0x3; |
26d08f08 AC |
2512 | } |
2513 | ||
ff644745 JB |
2514 | /* Return the minimal symbol whose name is NAME and stub type is STUB_TYPE. |
2515 | Return NULL if no such symbol was found. */ | |
2516 | ||
3b7344d5 | 2517 | struct bound_minimal_symbol |
ff644745 | 2518 | hppa_lookup_stub_minimal_symbol (const char *name, |
dda83cd7 | 2519 | enum unwind_stub_types stub_type) |
ff644745 | 2520 | { |
f6b3ad54 | 2521 | struct bound_minimal_symbol result; |
ff644745 | 2522 | |
2030c079 | 2523 | for (objfile *objfile : current_program_space->objfiles ()) |
ff644745 | 2524 | { |
7932255d | 2525 | for (minimal_symbol *msym : objfile->msymbols ()) |
5325b9bf | 2526 | { |
c9d95fa3 | 2527 | if (strcmp (msym->linkage_name (), name) == 0) |
3b7344d5 | 2528 | { |
5325b9bf TT |
2529 | struct unwind_table_entry *u; |
2530 | ||
2531 | u = find_unwind_entry (MSYMBOL_VALUE (msym)); | |
2532 | if (u != NULL && u->stub_unwind.stub_type == stub_type) | |
2533 | { | |
2534 | result.objfile = objfile; | |
2535 | result.minsym = msym; | |
2536 | return result; | |
2537 | } | |
3b7344d5 | 2538 | } |
5325b9bf | 2539 | } |
ff644745 JB |
2540 | } |
2541 | ||
3b7344d5 | 2542 | return result; |
ff644745 JB |
2543 | } |
2544 | ||
c906108c | 2545 | static void |
c482f52c | 2546 | unwind_command (const char *exp, int from_tty) |
c906108c SS |
2547 | { |
2548 | CORE_ADDR address; | |
2549 | struct unwind_table_entry *u; | |
2550 | ||
2551 | /* If we have an expression, evaluate it and use it as the address. */ | |
2552 | ||
2553 | if (exp != 0 && *exp != 0) | |
2554 | address = parse_and_eval_address (exp); | |
2555 | else | |
2556 | return; | |
2557 | ||
2558 | u = find_unwind_entry (address); | |
2559 | ||
2560 | if (!u) | |
2561 | { | |
56c5b29b | 2562 | printf_filtered ("Can't find unwind table entry for %s\n", exp); |
c906108c SS |
2563 | return; |
2564 | } | |
2565 | ||
56c5b29b | 2566 | printf_filtered ("unwind_table_entry (%s):\n", host_address_to_string (u)); |
c906108c | 2567 | |
56c5b29b | 2568 | printf_filtered ("\tregion_start = %s\n", hex_string (u->region_start)); |
c906108c | 2569 | |
56c5b29b | 2570 | printf_filtered ("\tregion_end = %s\n", hex_string (u->region_end)); |
c906108c | 2571 | |
56c5b29b | 2572 | #define pif(FLD) if (u->FLD) printf_filtered (" "#FLD); |
c906108c | 2573 | |
56c5b29b | 2574 | printf_filtered ("\n\tflags ="); |
c906108c SS |
2575 | pif (Cannot_unwind); |
2576 | pif (Millicode); | |
2577 | pif (Millicode_save_sr0); | |
2578 | pif (Entry_SR); | |
2579 | pif (Args_stored); | |
2580 | pif (Variable_Frame); | |
2581 | pif (Separate_Package_Body); | |
2582 | pif (Frame_Extension_Millicode); | |
2583 | pif (Stack_Overflow_Check); | |
2584 | pif (Two_Instruction_SP_Increment); | |
6fcecea0 RC |
2585 | pif (sr4export); |
2586 | pif (cxx_info); | |
2587 | pif (cxx_try_catch); | |
2588 | pif (sched_entry_seq); | |
c906108c SS |
2589 | pif (Save_SP); |
2590 | pif (Save_RP); | |
2591 | pif (Save_MRP_in_frame); | |
6fcecea0 | 2592 | pif (save_r19); |
c906108c SS |
2593 | pif (Cleanup_defined); |
2594 | pif (MPE_XL_interrupt_marker); | |
2595 | pif (HP_UX_interrupt_marker); | |
2596 | pif (Large_frame); | |
6fcecea0 | 2597 | pif (alloca_frame); |
c906108c | 2598 | |
a11ac3b3 | 2599 | gdb_putc ('\n'); |
c906108c | 2600 | |
56c5b29b | 2601 | #define pin(FLD) printf_filtered ("\t"#FLD" = 0x%x\n", u->FLD); |
c906108c SS |
2602 | |
2603 | pin (Region_description); | |
2604 | pin (Entry_FR); | |
2605 | pin (Entry_GR); | |
2606 | pin (Total_frame_size); | |
57dac9e1 RC |
2607 | |
2608 | if (u->stub_unwind.stub_type) | |
2609 | { | |
56c5b29b | 2610 | printf_filtered ("\tstub type = "); |
57dac9e1 | 2611 | switch (u->stub_unwind.stub_type) |
dda83cd7 | 2612 | { |
57dac9e1 | 2613 | case LONG_BRANCH: |
56c5b29b | 2614 | printf_filtered ("long branch\n"); |
57dac9e1 RC |
2615 | break; |
2616 | case PARAMETER_RELOCATION: | |
56c5b29b | 2617 | printf_filtered ("parameter relocation\n"); |
57dac9e1 RC |
2618 | break; |
2619 | case EXPORT: | |
56c5b29b | 2620 | printf_filtered ("export\n"); |
57dac9e1 RC |
2621 | break; |
2622 | case IMPORT: | |
56c5b29b | 2623 | printf_filtered ("import\n"); |
57dac9e1 RC |
2624 | break; |
2625 | case IMPORT_SHLIB: | |
56c5b29b | 2626 | printf_filtered ("import shlib\n"); |
57dac9e1 RC |
2627 | break; |
2628 | default: | |
56c5b29b | 2629 | printf_filtered ("unknown (%d)\n", u->stub_unwind.stub_type); |
57dac9e1 RC |
2630 | } |
2631 | } | |
c906108c | 2632 | } |
c906108c | 2633 | |
38ca4e0c MK |
2634 | /* Return the GDB type object for the "standard" data type of data in |
2635 | register REGNUM. */ | |
d709c020 | 2636 | |
eded0a31 | 2637 | static struct type * |
38ca4e0c | 2638 | hppa32_register_type (struct gdbarch *gdbarch, int regnum) |
d709c020 | 2639 | { |
38ca4e0c | 2640 | if (regnum < HPPA_FP4_REGNUM) |
df4df182 | 2641 | return builtin_type (gdbarch)->builtin_uint32; |
d709c020 | 2642 | else |
27067745 | 2643 | return builtin_type (gdbarch)->builtin_float; |
d709c020 JB |
2644 | } |
2645 | ||
eded0a31 | 2646 | static struct type * |
38ca4e0c | 2647 | hppa64_register_type (struct gdbarch *gdbarch, int regnum) |
3ff7cf9e | 2648 | { |
38ca4e0c | 2649 | if (regnum < HPPA64_FP4_REGNUM) |
df4df182 | 2650 | return builtin_type (gdbarch)->builtin_uint64; |
3ff7cf9e | 2651 | else |
27067745 | 2652 | return builtin_type (gdbarch)->builtin_double; |
3ff7cf9e JB |
2653 | } |
2654 | ||
38ca4e0c MK |
2655 | /* Return non-zero if REGNUM is not a register available to the user |
2656 | through ptrace/ttrace. */ | |
d709c020 | 2657 | |
8d153463 | 2658 | static int |
64a3914f | 2659 | hppa32_cannot_store_register (struct gdbarch *gdbarch, int regnum) |
d709c020 JB |
2660 | { |
2661 | return (regnum == 0 | |
dda83cd7 SM |
2662 | || regnum == HPPA_PCSQ_HEAD_REGNUM |
2663 | || (regnum >= HPPA_PCSQ_TAIL_REGNUM && regnum < HPPA_IPSW_REGNUM) | |
2664 | || (regnum > HPPA_IPSW_REGNUM && regnum < HPPA_FP4_REGNUM)); | |
38ca4e0c | 2665 | } |
d709c020 | 2666 | |
d037d088 | 2667 | static int |
64a3914f | 2668 | hppa32_cannot_fetch_register (struct gdbarch *gdbarch, int regnum) |
d037d088 CD |
2669 | { |
2670 | /* cr26 and cr27 are readable (but not writable) from userspace. */ | |
2671 | if (regnum == HPPA_CR26_REGNUM || regnum == HPPA_CR27_REGNUM) | |
2672 | return 0; | |
2673 | else | |
64a3914f | 2674 | return hppa32_cannot_store_register (gdbarch, regnum); |
d037d088 CD |
2675 | } |
2676 | ||
38ca4e0c | 2677 | static int |
64a3914f | 2678 | hppa64_cannot_store_register (struct gdbarch *gdbarch, int regnum) |
38ca4e0c MK |
2679 | { |
2680 | return (regnum == 0 | |
dda83cd7 SM |
2681 | || regnum == HPPA_PCSQ_HEAD_REGNUM |
2682 | || (regnum >= HPPA_PCSQ_TAIL_REGNUM && regnum < HPPA_IPSW_REGNUM) | |
2683 | || (regnum > HPPA_IPSW_REGNUM && regnum < HPPA64_FP4_REGNUM)); | |
d709c020 JB |
2684 | } |
2685 | ||
d037d088 | 2686 | static int |
64a3914f | 2687 | hppa64_cannot_fetch_register (struct gdbarch *gdbarch, int regnum) |
d037d088 CD |
2688 | { |
2689 | /* cr26 and cr27 are readable (but not writable) from userspace. */ | |
2690 | if (regnum == HPPA_CR26_REGNUM || regnum == HPPA_CR27_REGNUM) | |
2691 | return 0; | |
2692 | else | |
64a3914f | 2693 | return hppa64_cannot_store_register (gdbarch, regnum); |
d037d088 CD |
2694 | } |
2695 | ||
8d153463 | 2696 | static CORE_ADDR |
85ddcc70 | 2697 | hppa_addr_bits_remove (struct gdbarch *gdbarch, CORE_ADDR addr) |
d709c020 JB |
2698 | { |
2699 | /* The low two bits of the PC on the PA contain the privilege level. | |
2700 | Some genius implementing a (non-GCC) compiler apparently decided | |
2701 | this means that "addresses" in a text section therefore include a | |
2702 | privilege level, and thus symbol tables should contain these bits. | |
2703 | This seems like a bonehead thing to do--anyway, it seems to work | |
2704 | for our purposes to just ignore those bits. */ | |
2705 | ||
2706 | return (addr &= ~0x3); | |
2707 | } | |
2708 | ||
e127f0db MK |
2709 | /* Get the ARGIth function argument for the current function. */ |
2710 | ||
4a302917 | 2711 | static CORE_ADDR |
143985b7 AF |
2712 | hppa_fetch_pointer_argument (struct frame_info *frame, int argi, |
2713 | struct type *type) | |
2714 | { | |
e127f0db | 2715 | return get_frame_register_unsigned (frame, HPPA_R0_REGNUM + 26 - argi); |
143985b7 AF |
2716 | } |
2717 | ||
05d1431c | 2718 | static enum register_status |
849d0ba8 | 2719 | hppa_pseudo_register_read (struct gdbarch *gdbarch, readable_regcache *regcache, |
e127f0db | 2720 | int regnum, gdb_byte *buf) |
0f8d9d59 | 2721 | { |
05d1431c PA |
2722 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
2723 | ULONGEST tmp; | |
2724 | enum register_status status; | |
0f8d9d59 | 2725 | |
03f50fc8 | 2726 | status = regcache->raw_read (regnum, &tmp); |
05d1431c PA |
2727 | if (status == REG_VALID) |
2728 | { | |
2729 | if (regnum == HPPA_PCOQ_HEAD_REGNUM || regnum == HPPA_PCOQ_TAIL_REGNUM) | |
2730 | tmp &= ~0x3; | |
2731 | store_unsigned_integer (buf, sizeof tmp, byte_order, tmp); | |
2732 | } | |
2733 | return status; | |
0f8d9d59 RC |
2734 | } |
2735 | ||
d49771ef | 2736 | static CORE_ADDR |
e38c262f | 2737 | hppa_find_global_pointer (struct gdbarch *gdbarch, struct value *function) |
d49771ef RC |
2738 | { |
2739 | return 0; | |
2740 | } | |
2741 | ||
227e86ad JB |
2742 | struct value * |
2743 | hppa_frame_prev_register_helper (struct frame_info *this_frame, | |
098caef4 | 2744 | trad_frame_saved_reg saved_regs[], |
227e86ad | 2745 | int regnum) |
0da28f8a | 2746 | { |
227e86ad | 2747 | struct gdbarch *arch = get_frame_arch (this_frame); |
e17a4113 | 2748 | enum bfd_endian byte_order = gdbarch_byte_order (arch); |
8f4e467c | 2749 | |
8693c419 MK |
2750 | if (regnum == HPPA_PCOQ_TAIL_REGNUM) |
2751 | { | |
227e86ad JB |
2752 | int size = register_size (arch, HPPA_PCOQ_HEAD_REGNUM); |
2753 | CORE_ADDR pc; | |
2754 | struct value *pcoq_val = | |
dda83cd7 SM |
2755 | trad_frame_get_prev_register (this_frame, saved_regs, |
2756 | HPPA_PCOQ_HEAD_REGNUM); | |
8693c419 | 2757 | |
50888e42 | 2758 | pc = extract_unsigned_integer (value_contents_all (pcoq_val).data (), |
e17a4113 | 2759 | size, byte_order); |
227e86ad | 2760 | return frame_unwind_got_constant (this_frame, regnum, pc + 4); |
8693c419 | 2761 | } |
0da28f8a | 2762 | |
227e86ad | 2763 | return trad_frame_get_prev_register (this_frame, saved_regs, regnum); |
0da28f8a | 2764 | } |
8693c419 | 2765 | \f |
0da28f8a | 2766 | |
34f55018 MK |
2767 | /* An instruction to match. */ |
2768 | struct insn_pattern | |
2769 | { | |
2770 | unsigned int data; /* See if it matches this.... */ | |
2771 | unsigned int mask; /* ... with this mask. */ | |
2772 | }; | |
2773 | ||
2774 | /* See bfd/elf32-hppa.c */ | |
2775 | static struct insn_pattern hppa_long_branch_stub[] = { | |
2776 | /* ldil LR'xxx,%r1 */ | |
2777 | { 0x20200000, 0xffe00000 }, | |
2778 | /* be,n RR'xxx(%sr4,%r1) */ | |
2779 | { 0xe0202002, 0xffe02002 }, | |
2780 | { 0, 0 } | |
2781 | }; | |
2782 | ||
2783 | static struct insn_pattern hppa_long_branch_pic_stub[] = { | |
2784 | /* b,l .+8, %r1 */ | |
2785 | { 0xe8200000, 0xffe00000 }, | |
2786 | /* addil LR'xxx - ($PIC_pcrel$0 - 4), %r1 */ | |
2787 | { 0x28200000, 0xffe00000 }, | |
2788 | /* be,n RR'xxxx - ($PIC_pcrel$0 - 8)(%sr4, %r1) */ | |
2789 | { 0xe0202002, 0xffe02002 }, | |
2790 | { 0, 0 } | |
2791 | }; | |
2792 | ||
2793 | static struct insn_pattern hppa_import_stub[] = { | |
2794 | /* addil LR'xxx, %dp */ | |
2795 | { 0x2b600000, 0xffe00000 }, | |
2796 | /* ldw RR'xxx(%r1), %r21 */ | |
2797 | { 0x48350000, 0xffffb000 }, | |
2798 | /* bv %r0(%r21) */ | |
2799 | { 0xeaa0c000, 0xffffffff }, | |
2800 | /* ldw RR'xxx+4(%r1), %r19 */ | |
2801 | { 0x48330000, 0xffffb000 }, | |
2802 | { 0, 0 } | |
2803 | }; | |
2804 | ||
2805 | static struct insn_pattern hppa_import_pic_stub[] = { | |
2806 | /* addil LR'xxx,%r19 */ | |
2807 | { 0x2a600000, 0xffe00000 }, | |
2808 | /* ldw RR'xxx(%r1),%r21 */ | |
2809 | { 0x48350000, 0xffffb000 }, | |
2810 | /* bv %r0(%r21) */ | |
2811 | { 0xeaa0c000, 0xffffffff }, | |
2812 | /* ldw RR'xxx+4(%r1),%r19 */ | |
2813 | { 0x48330000, 0xffffb000 }, | |
2814 | { 0, 0 }, | |
2815 | }; | |
2816 | ||
2817 | static struct insn_pattern hppa_plt_stub[] = { | |
2818 | /* b,l 1b, %r20 - 1b is 3 insns before here */ | |
2819 | { 0xea9f1fdd, 0xffffffff }, | |
2820 | /* depi 0,31,2,%r20 */ | |
2821 | { 0xd6801c1e, 0xffffffff }, | |
2822 | { 0, 0 } | |
34f55018 MK |
2823 | }; |
2824 | ||
2825 | /* Maximum number of instructions on the patterns above. */ | |
2826 | #define HPPA_MAX_INSN_PATTERN_LEN 4 | |
2827 | ||
2828 | /* Return non-zero if the instructions at PC match the series | |
2829 | described in PATTERN, or zero otherwise. PATTERN is an array of | |
2830 | 'struct insn_pattern' objects, terminated by an entry whose mask is | |
2831 | zero. | |
2832 | ||
2833 | When the match is successful, fill INSN[i] with what PATTERN[i] | |
2834 | matched. */ | |
2835 | ||
2836 | static int | |
e17a4113 UW |
2837 | hppa_match_insns (struct gdbarch *gdbarch, CORE_ADDR pc, |
2838 | struct insn_pattern *pattern, unsigned int *insn) | |
34f55018 | 2839 | { |
e17a4113 | 2840 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
34f55018 MK |
2841 | CORE_ADDR npc = pc; |
2842 | int i; | |
2843 | ||
2844 | for (i = 0; pattern[i].mask; i++) | |
2845 | { | |
2846 | gdb_byte buf[HPPA_INSN_SIZE]; | |
2847 | ||
8defab1a | 2848 | target_read_memory (npc, buf, HPPA_INSN_SIZE); |
e17a4113 | 2849 | insn[i] = extract_unsigned_integer (buf, HPPA_INSN_SIZE, byte_order); |
34f55018 | 2850 | if ((insn[i] & pattern[i].mask) == pattern[i].data) |
dda83cd7 | 2851 | npc += 4; |
34f55018 | 2852 | else |
dda83cd7 | 2853 | return 0; |
34f55018 MK |
2854 | } |
2855 | ||
2856 | return 1; | |
2857 | } | |
2858 | ||
85102364 | 2859 | /* This relaxed version of the instruction matcher allows us to match |
34f55018 MK |
2860 | from somewhere inside the pattern, by looking backwards in the |
2861 | instruction scheme. */ | |
2862 | ||
2863 | static int | |
e17a4113 UW |
2864 | hppa_match_insns_relaxed (struct gdbarch *gdbarch, CORE_ADDR pc, |
2865 | struct insn_pattern *pattern, unsigned int *insn) | |
34f55018 MK |
2866 | { |
2867 | int offset, len = 0; | |
2868 | ||
2869 | while (pattern[len].mask) | |
2870 | len++; | |
2871 | ||
2872 | for (offset = 0; offset < len; offset++) | |
e17a4113 UW |
2873 | if (hppa_match_insns (gdbarch, pc - offset * HPPA_INSN_SIZE, |
2874 | pattern, insn)) | |
34f55018 MK |
2875 | return 1; |
2876 | ||
2877 | return 0; | |
2878 | } | |
2879 | ||
2880 | static int | |
2881 | hppa_in_dyncall (CORE_ADDR pc) | |
2882 | { | |
2883 | struct unwind_table_entry *u; | |
2884 | ||
2885 | u = find_unwind_entry (hppa_symbol_address ("$$dyncall")); | |
2886 | if (!u) | |
2887 | return 0; | |
2888 | ||
2889 | return (pc >= u->region_start && pc <= u->region_end); | |
2890 | } | |
2891 | ||
2892 | int | |
3e5d3a5a | 2893 | hppa_in_solib_call_trampoline (struct gdbarch *gdbarch, CORE_ADDR pc) |
34f55018 MK |
2894 | { |
2895 | unsigned int insn[HPPA_MAX_INSN_PATTERN_LEN]; | |
2896 | struct unwind_table_entry *u; | |
2897 | ||
3e5d3a5a | 2898 | if (in_plt_section (pc) || hppa_in_dyncall (pc)) |
34f55018 MK |
2899 | return 1; |
2900 | ||
2901 | /* The GNU toolchain produces linker stubs without unwind | |
2902 | information. Since the pattern matching for linker stubs can be | |
2903 | quite slow, so bail out if we do have an unwind entry. */ | |
2904 | ||
2905 | u = find_unwind_entry (pc); | |
806e23c0 | 2906 | if (u != NULL) |
34f55018 MK |
2907 | return 0; |
2908 | ||
e17a4113 UW |
2909 | return |
2910 | (hppa_match_insns_relaxed (gdbarch, pc, hppa_import_stub, insn) | |
2911 | || hppa_match_insns_relaxed (gdbarch, pc, hppa_import_pic_stub, insn) | |
2912 | || hppa_match_insns_relaxed (gdbarch, pc, hppa_long_branch_stub, insn) | |
2913 | || hppa_match_insns_relaxed (gdbarch, pc, | |
2914 | hppa_long_branch_pic_stub, insn)); | |
34f55018 MK |
2915 | } |
2916 | ||
2917 | /* This code skips several kind of "trampolines" used on PA-RISC | |
2918 | systems: $$dyncall, import stubs and PLT stubs. */ | |
2919 | ||
2920 | CORE_ADDR | |
52f729a7 | 2921 | hppa_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc) |
34f55018 | 2922 | { |
0dfff4cb UW |
2923 | struct gdbarch *gdbarch = get_frame_arch (frame); |
2924 | struct type *func_ptr_type = builtin_type (gdbarch)->builtin_func_ptr; | |
2925 | ||
34f55018 MK |
2926 | unsigned int insn[HPPA_MAX_INSN_PATTERN_LEN]; |
2927 | int dp_rel; | |
2928 | ||
2929 | /* $$dyncall handles both PLABELs and direct addresses. */ | |
2930 | if (hppa_in_dyncall (pc)) | |
2931 | { | |
52f729a7 | 2932 | pc = get_frame_register_unsigned (frame, HPPA_R0_REGNUM + 22); |
34f55018 MK |
2933 | |
2934 | /* PLABELs have bit 30 set; if it's a PLABEL, then dereference it. */ | |
2935 | if (pc & 0x2) | |
0dfff4cb | 2936 | pc = read_memory_typed_address (pc & ~0x3, func_ptr_type); |
34f55018 MK |
2937 | |
2938 | return pc; | |
2939 | } | |
2940 | ||
e17a4113 UW |
2941 | dp_rel = hppa_match_insns (gdbarch, pc, hppa_import_stub, insn); |
2942 | if (dp_rel || hppa_match_insns (gdbarch, pc, hppa_import_pic_stub, insn)) | |
34f55018 MK |
2943 | { |
2944 | /* Extract the target address from the addil/ldw sequence. */ | |
2945 | pc = hppa_extract_21 (insn[0]) + hppa_extract_14 (insn[1]); | |
2946 | ||
2947 | if (dp_rel) | |
dda83cd7 | 2948 | pc += get_frame_register_unsigned (frame, HPPA_DP_REGNUM); |
34f55018 | 2949 | else |
dda83cd7 | 2950 | pc += get_frame_register_unsigned (frame, HPPA_R0_REGNUM + 19); |
34f55018 MK |
2951 | |
2952 | /* fallthrough */ | |
2953 | } | |
2954 | ||
3e5d3a5a | 2955 | if (in_plt_section (pc)) |
34f55018 | 2956 | { |
0dfff4cb | 2957 | pc = read_memory_typed_address (pc, func_ptr_type); |
34f55018 MK |
2958 | |
2959 | /* If the PLT slot has not yet been resolved, the target will be | |
dda83cd7 | 2960 | the PLT stub. */ |
3e5d3a5a | 2961 | if (in_plt_section (pc)) |
34f55018 MK |
2962 | { |
2963 | /* Sanity check: are we pointing to the PLT stub? */ | |
24b21115 | 2964 | if (!hppa_match_insns (gdbarch, pc, hppa_plt_stub, insn)) |
34f55018 | 2965 | { |
5af949e3 UW |
2966 | warning (_("Cannot resolve PLT stub at %s."), |
2967 | paddress (gdbarch, pc)); | |
34f55018 MK |
2968 | return 0; |
2969 | } | |
2970 | ||
2971 | /* This should point to the fixup routine. */ | |
0dfff4cb | 2972 | pc = read_memory_typed_address (pc + 8, func_ptr_type); |
34f55018 MK |
2973 | } |
2974 | } | |
2975 | ||
2976 | return pc; | |
2977 | } | |
2978 | \f | |
2979 | ||
8e8b2dba MC |
2980 | /* Here is a table of C type sizes on hppa with various compiles |
2981 | and options. I measured this on PA 9000/800 with HP-UX 11.11 | |
2982 | and these compilers: | |
2983 | ||
2984 | /usr/ccs/bin/cc HP92453-01 A.11.01.21 | |
2985 | /opt/ansic/bin/cc HP92453-01 B.11.11.28706.GP | |
2986 | /opt/aCC/bin/aCC B3910B A.03.45 | |
2987 | gcc gcc 3.3.2 native hppa2.0w-hp-hpux11.11 | |
2988 | ||
2989 | cc : 1 2 4 4 8 : 4 8 -- : 4 4 | |
2990 | ansic +DA1.1 : 1 2 4 4 8 : 4 8 16 : 4 4 | |
2991 | ansic +DA2.0 : 1 2 4 4 8 : 4 8 16 : 4 4 | |
2992 | ansic +DA2.0W : 1 2 4 8 8 : 4 8 16 : 8 8 | |
2993 | acc +DA1.1 : 1 2 4 4 8 : 4 8 16 : 4 4 | |
2994 | acc +DA2.0 : 1 2 4 4 8 : 4 8 16 : 4 4 | |
2995 | acc +DA2.0W : 1 2 4 8 8 : 4 8 16 : 8 8 | |
2996 | gcc : 1 2 4 4 8 : 4 8 16 : 4 4 | |
2997 | ||
2998 | Each line is: | |
2999 | ||
3000 | compiler and options | |
3001 | char, short, int, long, long long | |
3002 | float, double, long double | |
3003 | char *, void (*)() | |
3004 | ||
3005 | So all these compilers use either ILP32 or LP64 model. | |
3006 | TODO: gcc has more options so it needs more investigation. | |
3007 | ||
a2379359 MC |
3008 | For floating point types, see: |
3009 | ||
3010 | http://docs.hp.com/hpux/pdf/B3906-90006.pdf | |
3011 | HP-UX floating-point guide, hpux 11.00 | |
3012 | ||
8e8b2dba MC |
3013 | -- chastain 2003-12-18 */ |
3014 | ||
e6e68f1f JB |
3015 | static struct gdbarch * |
3016 | hppa_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) | |
3017 | { | |
3018 | struct gdbarch *gdbarch; | |
3019 | ||
3020 | /* find a candidate among the list of pre-declared architectures. */ | |
3021 | arches = gdbarch_list_lookup_by_info (arches, &info); | |
3022 | if (arches != NULL) | |
3023 | return (arches->gdbarch); | |
3024 | ||
3025 | /* If none found, then allocate and initialize one. */ | |
345bd07c | 3026 | hppa_gdbarch_tdep *tdep = new hppa_gdbarch_tdep; |
3ff7cf9e JB |
3027 | gdbarch = gdbarch_alloc (&info, tdep); |
3028 | ||
3029 | /* Determine from the bfd_arch_info structure if we are dealing with | |
3030 | a 32 or 64 bits architecture. If the bfd_arch_info is not available, | |
3031 | then default to a 32bit machine. */ | |
3032 | if (info.bfd_arch_info != NULL) | |
3033 | tdep->bytes_per_address = | |
3034 | info.bfd_arch_info->bits_per_address / info.bfd_arch_info->bits_per_byte; | |
3035 | else | |
3036 | tdep->bytes_per_address = 4; | |
3037 | ||
d49771ef RC |
3038 | tdep->find_global_pointer = hppa_find_global_pointer; |
3039 | ||
3ff7cf9e JB |
3040 | /* Some parts of the gdbarch vector depend on whether we are running |
3041 | on a 32 bits or 64 bits target. */ | |
3042 | switch (tdep->bytes_per_address) | |
3043 | { | |
3044 | case 4: | |
dda83cd7 SM |
3045 | set_gdbarch_num_regs (gdbarch, hppa32_num_regs); |
3046 | set_gdbarch_register_name (gdbarch, hppa32_register_name); | |
3047 | set_gdbarch_register_type (gdbarch, hppa32_register_type); | |
38ca4e0c MK |
3048 | set_gdbarch_cannot_store_register (gdbarch, |
3049 | hppa32_cannot_store_register); | |
3050 | set_gdbarch_cannot_fetch_register (gdbarch, | |
d037d088 | 3051 | hppa32_cannot_fetch_register); |
dda83cd7 | 3052 | break; |
3ff7cf9e | 3053 | case 8: |
dda83cd7 SM |
3054 | set_gdbarch_num_regs (gdbarch, hppa64_num_regs); |
3055 | set_gdbarch_register_name (gdbarch, hppa64_register_name); | |
3056 | set_gdbarch_register_type (gdbarch, hppa64_register_type); | |
3057 | set_gdbarch_dwarf2_reg_to_regnum (gdbarch, hppa64_dwarf_reg_to_regnum); | |
38ca4e0c MK |
3058 | set_gdbarch_cannot_store_register (gdbarch, |
3059 | hppa64_cannot_store_register); | |
3060 | set_gdbarch_cannot_fetch_register (gdbarch, | |
d037d088 | 3061 | hppa64_cannot_fetch_register); |
dda83cd7 | 3062 | break; |
3ff7cf9e | 3063 | default: |
dda83cd7 SM |
3064 | internal_error (__FILE__, __LINE__, _("Unsupported address size: %d"), |
3065 | tdep->bytes_per_address); | |
3ff7cf9e JB |
3066 | } |
3067 | ||
3ff7cf9e | 3068 | set_gdbarch_long_bit (gdbarch, tdep->bytes_per_address * TARGET_CHAR_BIT); |
3ff7cf9e | 3069 | set_gdbarch_ptr_bit (gdbarch, tdep->bytes_per_address * TARGET_CHAR_BIT); |
e6e68f1f | 3070 | |
8e8b2dba MC |
3071 | /* The following gdbarch vector elements are the same in both ILP32 |
3072 | and LP64, but might show differences some day. */ | |
3073 | set_gdbarch_long_long_bit (gdbarch, 64); | |
3074 | set_gdbarch_long_double_bit (gdbarch, 128); | |
8da61cc4 | 3075 | set_gdbarch_long_double_format (gdbarch, floatformats_ia64_quad); |
8e8b2dba | 3076 | |
3ff7cf9e JB |
3077 | /* The following gdbarch vector elements do not depend on the address |
3078 | size, or in any other gdbarch element previously set. */ | |
60383d10 | 3079 | set_gdbarch_skip_prologue (gdbarch, hppa_skip_prologue); |
c9cf6e20 MG |
3080 | set_gdbarch_stack_frame_destroyed_p (gdbarch, |
3081 | hppa_stack_frame_destroyed_p); | |
a2a84a72 | 3082 | set_gdbarch_inner_than (gdbarch, core_addr_greaterthan); |
eded0a31 AC |
3083 | set_gdbarch_sp_regnum (gdbarch, HPPA_SP_REGNUM); |
3084 | set_gdbarch_fp0_regnum (gdbarch, HPPA_FP0_REGNUM); | |
85ddcc70 | 3085 | set_gdbarch_addr_bits_remove (gdbarch, hppa_addr_bits_remove); |
60383d10 | 3086 | set_gdbarch_believe_pcc_promotion (gdbarch, 1); |
cc72850f MK |
3087 | set_gdbarch_read_pc (gdbarch, hppa_read_pc); |
3088 | set_gdbarch_write_pc (gdbarch, hppa_write_pc); | |
60383d10 | 3089 | |
143985b7 AF |
3090 | /* Helper for function argument information. */ |
3091 | set_gdbarch_fetch_pointer_argument (gdbarch, hppa_fetch_pointer_argument); | |
3092 | ||
3a3bc038 AC |
3093 | /* When a hardware watchpoint triggers, we'll move the inferior past |
3094 | it by removing all eventpoints; stepping past the instruction | |
3095 | that caused the trigger; reinserting eventpoints; and checking | |
3096 | whether any watched location changed. */ | |
3097 | set_gdbarch_have_nonsteppable_watchpoint (gdbarch, 1); | |
3098 | ||
5979bc46 | 3099 | /* Inferior function call methods. */ |
fca7aa43 | 3100 | switch (tdep->bytes_per_address) |
5979bc46 | 3101 | { |
fca7aa43 AC |
3102 | case 4: |
3103 | set_gdbarch_push_dummy_call (gdbarch, hppa32_push_dummy_call); | |
3104 | set_gdbarch_frame_align (gdbarch, hppa32_frame_align); | |
d49771ef | 3105 | set_gdbarch_convert_from_func_ptr_addr |
dda83cd7 | 3106 | (gdbarch, hppa32_convert_from_func_ptr_addr); |
fca7aa43 AC |
3107 | break; |
3108 | case 8: | |
782eae8b AC |
3109 | set_gdbarch_push_dummy_call (gdbarch, hppa64_push_dummy_call); |
3110 | set_gdbarch_frame_align (gdbarch, hppa64_frame_align); | |
fca7aa43 | 3111 | break; |
782eae8b | 3112 | default: |
e2e0b3e5 | 3113 | internal_error (__FILE__, __LINE__, _("bad switch")); |
fad850b2 AC |
3114 | } |
3115 | ||
3116 | /* Struct return methods. */ | |
fca7aa43 | 3117 | switch (tdep->bytes_per_address) |
fad850b2 | 3118 | { |
fca7aa43 AC |
3119 | case 4: |
3120 | set_gdbarch_return_value (gdbarch, hppa32_return_value); | |
3121 | break; | |
3122 | case 8: | |
782eae8b | 3123 | set_gdbarch_return_value (gdbarch, hppa64_return_value); |
f5f907e2 | 3124 | break; |
fca7aa43 | 3125 | default: |
e2e0b3e5 | 3126 | internal_error (__FILE__, __LINE__, _("bad switch")); |
e963316f | 3127 | } |
7f07c5b6 | 3128 | |
04180708 YQ |
3129 | set_gdbarch_breakpoint_kind_from_pc (gdbarch, hppa_breakpoint::kind_from_pc); |
3130 | set_gdbarch_sw_breakpoint_from_kind (gdbarch, hppa_breakpoint::bp_from_kind); | |
7f07c5b6 | 3131 | set_gdbarch_pseudo_register_read (gdbarch, hppa_pseudo_register_read); |
85f4f2d8 | 3132 | |
5979bc46 | 3133 | /* Frame unwind methods. */ |
782eae8b | 3134 | set_gdbarch_unwind_pc (gdbarch, hppa_unwind_pc); |
7f07c5b6 | 3135 | |
50306a9d RC |
3136 | /* Hook in ABI-specific overrides, if they have been registered. */ |
3137 | gdbarch_init_osabi (info, gdbarch); | |
3138 | ||
7f07c5b6 | 3139 | /* Hook in the default unwinders. */ |
227e86ad JB |
3140 | frame_unwind_append_unwinder (gdbarch, &hppa_stub_frame_unwind); |
3141 | frame_unwind_append_unwinder (gdbarch, &hppa_frame_unwind); | |
3142 | frame_unwind_append_unwinder (gdbarch, &hppa_fallback_frame_unwind); | |
5979bc46 | 3143 | |
e6e68f1f JB |
3144 | return gdbarch; |
3145 | } | |
3146 | ||
3147 | static void | |
464963c9 | 3148 | hppa_dump_tdep (struct gdbarch *gdbarch, struct ui_file *file) |
e6e68f1f | 3149 | { |
345bd07c | 3150 | hppa_gdbarch_tdep *tdep = (hppa_gdbarch_tdep *) gdbarch_tdep (gdbarch); |
fdd72f95 | 3151 | |
a1ea4cac TT |
3152 | fprintf_filtered (file, "bytes_per_address = %d\n", |
3153 | tdep->bytes_per_address); | |
3154 | fprintf_filtered (file, "elf = %s\n", tdep->is_elf ? "yes" : "no"); | |
e6e68f1f JB |
3155 | } |
3156 | ||
6c265988 | 3157 | void _initialize_hppa_tdep (); |
4facf7e8 | 3158 | void |
6c265988 | 3159 | _initialize_hppa_tdep () |
4facf7e8 | 3160 | { |
e6e68f1f | 3161 | gdbarch_register (bfd_arch_hppa, hppa_gdbarch_init, hppa_dump_tdep); |
4facf7e8 JB |
3162 | |
3163 | add_cmd ("unwind", class_maintenance, unwind_command, | |
1a966eab | 3164 | _("Print unwind table entry at given address."), |
4facf7e8 JB |
3165 | &maintenanceprintlist); |
3166 | ||
1777feb0 | 3167 | /* Debug this files internals. */ |
7915a72c AC |
3168 | add_setshow_boolean_cmd ("hppa", class_maintenance, &hppa_debug, _("\ |
3169 | Set whether hppa target specific debugging information should be displayed."), | |
3170 | _("\ | |
3171 | Show whether hppa target specific debugging information is displayed."), _("\ | |
4a302917 RC |
3172 | This flag controls whether hppa target specific debugging information is\n\ |
3173 | displayed. This information is particularly useful for debugging frame\n\ | |
7915a72c | 3174 | unwinding problems."), |
2c5b56ce | 3175 | NULL, |
7915a72c | 3176 | NULL, /* FIXME: i18n: hppa debug flag is %s. */ |
2c5b56ce | 3177 | &setdebuglist, &showdebuglist); |
4facf7e8 | 3178 | } |