1 /* libunwind - a platform-independent unwind library
2 Copyright (C) 2006-2007 IBM
4 Corey Ashford <cjashfor@us.ibm.com>
5 Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
7 This file is part of libunwind.
9 Permission is hereby granted, free of charge, to any person obtaining
10 a copy of this software and associated documentation files (the
11 "Software"), to deal in the Software without restriction, including
12 without limitation the rights to use, copy, modify, merge, publish,
13 distribute, sublicense, and/or sell copies of the Software, and to
14 permit persons to whom the Software is furnished to do so, subject to
15 the following conditions:
17 The above copyright notice and this permission notice shall be
18 included in all copies or substantial portions of the Software.
20 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
29 #include "ucontext_i.h"
32 /* This definition originates in /usr/include/asm-ppc64/ptrace.h, but is
33 defined there only when __KERNEL__ is defined. We reproduce it here for
34 our use at the user level in order to locate the ucontext record, which
35 appears to be at this offset relative to the stack pointer when in the
36 context of the signal handler return trampoline code -
37 __kernel_sigtramp_rt64. */
38 #define __SIGNAL_FRAMESIZE 128
40 /* This definition comes from the document "64-bit PowerPC ELF Application
41 Binary Interface Supplement 1.9", section 3.2.2.
42 http://www.linux-foundation.org/spec/ELF/ppc64/PPC-elf64abi-1.9.html#STACK */
46 long unsigned back_chain;
47 long unsigned cr_save;
48 long unsigned lr_save;
49 /* many more fields here, but they are unused by this code */
54 unw_step (unw_cursor_t * cursor)
56 struct cursor *c = (struct cursor *) cursor;
58 unw_word_t back_chain_offset, lr_save_offset, v_regs_ptr;
59 struct dwarf_loc back_chain_loc, lr_save_loc, sp_loc, ip_loc, v_regs_loc;
62 Debug (1, "(cursor=%p, ip=0x%016lx)\n", c, (unsigned long) c->dwarf.ip);
66 /* Unless the cursor or stack is corrupt or uninitialized,
67 we've most likely hit the top of the stack */
71 /* Try DWARF-based unwinding... */
73 ret = dwarf_step (&c->dwarf);
75 if (ret < 0 && ret != -UNW_ENOINFO)
77 Debug (2, "returning %d\n", ret);
81 if (unlikely (ret < 0))
83 if (likely (!unw_is_signal_frame (cursor)))
85 /* DWARF unwinding failed. As of 09/26/2006, gcc in 64-bit mode
86 produces the mandatory level of traceback record in the code, but
87 I get the impression that this is transitory, that eventually gcc
88 will not produce any traceback records at all. So, for now, we
89 won't bother to try to find and use these records.
91 We can, however, attempt to unwind the frame by using the callback
92 chain. This is very crude, however, and won't be able to unwind
93 any registers besides the IP, SP, and LR . */
95 back_chain_offset = ((void *) &dummy.back_chain - (void *) &dummy);
96 lr_save_offset = ((void *) &dummy.lr_save - (void *) &dummy);
98 back_chain_loc = DWARF_LOC (c->dwarf.cfa + back_chain_offset, 0);
101 dwarf_get (&c->dwarf, back_chain_loc, &c->dwarf.cfa)) < 0)
104 "Unable to retrieve CFA from back chain in stack frame - %d\n",
108 if (c->dwarf.cfa == 0)
109 /* Unless the cursor or stack is corrupt or uninitialized we've most
110 likely hit the top of the stack */
113 lr_save_loc = DWARF_LOC (c->dwarf.cfa + lr_save_offset, 0);
115 if ((ret = dwarf_get (&c->dwarf, lr_save_loc, &c->dwarf.ip)) < 0)
118 "Unable to retrieve IP from lr save in stack frame - %d\n",
126 /* Find the sigcontext record by taking the CFA and adjusting by
127 the dummy signal frame size.
129 Note that there isn't any way to determined if SA_SIGINFO was
130 set in the sa_flags parameter to sigaction when the signal
131 handler was established. If it was not set, the ucontext
132 record is not required to be on the stack, in which case the
133 following code will likely cause a seg fault or other crash
136 unw_word_t ucontext = c->dwarf.cfa + __SIGNAL_FRAMESIZE;
138 Debug (1, "signal frame, skip over trampoline\n");
140 c->sigcontext_format = PPC_SCF_LINUX_RT_SIGFRAME;
141 c->sigcontext_addr = ucontext;
143 sp_loc = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R1, 0);
144 ip_loc = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_NIP, 0);
146 ret = dwarf_get (&c->dwarf, sp_loc, &c->dwarf.cfa);
149 Debug (2, "returning %d\n", ret);
152 ret = dwarf_get (&c->dwarf, ip_loc, &c->dwarf.ip);
155 Debug (2, "returning %d\n", ret);
159 /* Instead of just restoring the non-volatile registers, do all
160 of the registers for now. This will incur a performance hit,
161 but it's rare enough not to cause too much of a problem, and
162 might be useful in some cases. */
163 c->dwarf.loc[UNW_PPC64_R0] =
164 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R0, 0);
165 c->dwarf.loc[UNW_PPC64_R1] =
166 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R1, 0);
167 c->dwarf.loc[UNW_PPC64_R2] =
168 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R2, 0);
169 c->dwarf.loc[UNW_PPC64_R3] =
170 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R3, 0);
171 c->dwarf.loc[UNW_PPC64_R4] =
172 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R4, 0);
173 c->dwarf.loc[UNW_PPC64_R5] =
174 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R5, 0);
175 c->dwarf.loc[UNW_PPC64_R6] =
176 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R6, 0);
177 c->dwarf.loc[UNW_PPC64_R7] =
178 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R7, 0);
179 c->dwarf.loc[UNW_PPC64_R8] =
180 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R8, 0);
181 c->dwarf.loc[UNW_PPC64_R9] =
182 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R9, 0);
183 c->dwarf.loc[UNW_PPC64_R10] =
184 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R10, 0);
185 c->dwarf.loc[UNW_PPC64_R11] =
186 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R11, 0);
187 c->dwarf.loc[UNW_PPC64_R12] =
188 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R12, 0);
189 c->dwarf.loc[UNW_PPC64_R13] =
190 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R13, 0);
191 c->dwarf.loc[UNW_PPC64_R14] =
192 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R14, 0);
193 c->dwarf.loc[UNW_PPC64_R15] =
194 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R15, 0);
195 c->dwarf.loc[UNW_PPC64_R16] =
196 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R16, 0);
197 c->dwarf.loc[UNW_PPC64_R17] =
198 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R17, 0);
199 c->dwarf.loc[UNW_PPC64_R18] =
200 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R18, 0);
201 c->dwarf.loc[UNW_PPC64_R19] =
202 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R19, 0);
203 c->dwarf.loc[UNW_PPC64_R20] =
204 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R20, 0);
205 c->dwarf.loc[UNW_PPC64_R21] =
206 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R21, 0);
207 c->dwarf.loc[UNW_PPC64_R22] =
208 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R22, 0);
209 c->dwarf.loc[UNW_PPC64_R23] =
210 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R23, 0);
211 c->dwarf.loc[UNW_PPC64_R24] =
212 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R24, 0);
213 c->dwarf.loc[UNW_PPC64_R25] =
214 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R25, 0);
215 c->dwarf.loc[UNW_PPC64_R26] =
216 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R26, 0);
217 c->dwarf.loc[UNW_PPC64_R27] =
218 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R27, 0);
219 c->dwarf.loc[UNW_PPC64_R28] =
220 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R28, 0);
221 c->dwarf.loc[UNW_PPC64_R29] =
222 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R29, 0);
223 c->dwarf.loc[UNW_PPC64_R30] =
224 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R30, 0);
225 c->dwarf.loc[UNW_PPC64_R31] =
226 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R31, 0);
228 c->dwarf.loc[UNW_PPC64_LR] =
229 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_LINK, 0);
230 c->dwarf.loc[UNW_PPC64_CTR] =
231 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_CTR, 0);
232 /* This CR0 assignment is probably wrong. There are 8 dwarf columns
233 assigned to the CR registers, but only one CR register in the
234 mcontext structure */
235 c->dwarf.loc[UNW_PPC64_CR0] =
236 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_CCR, 0);
237 c->dwarf.loc[UNW_PPC64_XER] =
238 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_XER, 0);
239 c->dwarf.loc[UNW_PPC64_NIP] =
240 DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_NIP, 0);
242 /* TODO: Is there a way of obtaining the value of the
243 pseudo frame pointer (which is sp + some fixed offset, I
244 assume), based on the contents of the ucontext record
245 structure? For now, set this loc to null. */
246 c->dwarf.loc[UNW_PPC64_FRAME_POINTER] = DWARF_NULL_LOC;
248 c->dwarf.loc[UNW_PPC64_F0] =
249 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R0, 0);
250 c->dwarf.loc[UNW_PPC64_F1] =
251 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R1, 0);
252 c->dwarf.loc[UNW_PPC64_F2] =
253 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R2, 0);
254 c->dwarf.loc[UNW_PPC64_F3] =
255 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R3, 0);
256 c->dwarf.loc[UNW_PPC64_F4] =
257 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R4, 0);
258 c->dwarf.loc[UNW_PPC64_F5] =
259 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R5, 0);
260 c->dwarf.loc[UNW_PPC64_F6] =
261 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R6, 0);
262 c->dwarf.loc[UNW_PPC64_F7] =
263 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R7, 0);
264 c->dwarf.loc[UNW_PPC64_F8] =
265 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R8, 0);
266 c->dwarf.loc[UNW_PPC64_F9] =
267 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R9, 0);
268 c->dwarf.loc[UNW_PPC64_F10] =
269 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R10, 0);
270 c->dwarf.loc[UNW_PPC64_F11] =
271 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R11, 0);
272 c->dwarf.loc[UNW_PPC64_F12] =
273 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R12, 0);
274 c->dwarf.loc[UNW_PPC64_F13] =
275 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R13, 0);
276 c->dwarf.loc[UNW_PPC64_F14] =
277 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R14, 0);
278 c->dwarf.loc[UNW_PPC64_F15] =
279 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R15, 0);
280 c->dwarf.loc[UNW_PPC64_F16] =
281 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R16, 0);
282 c->dwarf.loc[UNW_PPC64_F17] =
283 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R17, 0);
284 c->dwarf.loc[UNW_PPC64_F18] =
285 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R18, 0);
286 c->dwarf.loc[UNW_PPC64_F19] =
287 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R19, 0);
288 c->dwarf.loc[UNW_PPC64_F20] =
289 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R20, 0);
290 c->dwarf.loc[UNW_PPC64_F21] =
291 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R21, 0);
292 c->dwarf.loc[UNW_PPC64_F22] =
293 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R22, 0);
294 c->dwarf.loc[UNW_PPC64_F23] =
295 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R23, 0);
296 c->dwarf.loc[UNW_PPC64_F24] =
297 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R24, 0);
298 c->dwarf.loc[UNW_PPC64_F25] =
299 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R25, 0);
300 c->dwarf.loc[UNW_PPC64_F26] =
301 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R26, 0);
302 c->dwarf.loc[UNW_PPC64_F27] =
303 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R27, 0);
304 c->dwarf.loc[UNW_PPC64_F28] =
305 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R28, 0);
306 c->dwarf.loc[UNW_PPC64_F29] =
307 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R29, 0);
308 c->dwarf.loc[UNW_PPC64_F30] =
309 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R30, 0);
310 c->dwarf.loc[UNW_PPC64_F31] =
311 DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R31, 0);
312 /* Note that there is no .eh_section register column for the
313 FPSCR register. I don't know why this is. */
315 v_regs_loc = DWARF_LOC (ucontext + UC_MCONTEXT_V_REGS, 0);
316 ret = dwarf_get (&c->dwarf, v_regs_loc, &v_regs_ptr);
319 Debug (2, "returning %d\n", ret);
324 /* The v_regs_ptr is not null. Set all of the AltiVec locs */
326 c->dwarf.loc[UNW_PPC64_V0] =
327 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R0, 0);
328 c->dwarf.loc[UNW_PPC64_V1] =
329 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R1, 0);
330 c->dwarf.loc[UNW_PPC64_V2] =
331 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R2, 0);
332 c->dwarf.loc[UNW_PPC64_V3] =
333 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R3, 0);
334 c->dwarf.loc[UNW_PPC64_V4] =
335 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R4, 0);
336 c->dwarf.loc[UNW_PPC64_V5] =
337 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R5, 0);
338 c->dwarf.loc[UNW_PPC64_V6] =
339 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R6, 0);
340 c->dwarf.loc[UNW_PPC64_V7] =
341 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R7, 0);
342 c->dwarf.loc[UNW_PPC64_V8] =
343 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R8, 0);
344 c->dwarf.loc[UNW_PPC64_V9] =
345 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R9, 0);
346 c->dwarf.loc[UNW_PPC64_V10] =
347 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R10, 0);
348 c->dwarf.loc[UNW_PPC64_V11] =
349 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R11, 0);
350 c->dwarf.loc[UNW_PPC64_V12] =
351 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R12, 0);
352 c->dwarf.loc[UNW_PPC64_V13] =
353 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R13, 0);
354 c->dwarf.loc[UNW_PPC64_V14] =
355 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R14, 0);
356 c->dwarf.loc[UNW_PPC64_V15] =
357 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R15, 0);
358 c->dwarf.loc[UNW_PPC64_V16] =
359 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R16, 0);
360 c->dwarf.loc[UNW_PPC64_V17] =
361 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R17, 0);
362 c->dwarf.loc[UNW_PPC64_V18] =
363 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R18, 0);
364 c->dwarf.loc[UNW_PPC64_V19] =
365 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R19, 0);
366 c->dwarf.loc[UNW_PPC64_V20] =
367 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R20, 0);
368 c->dwarf.loc[UNW_PPC64_V21] =
369 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R21, 0);
370 c->dwarf.loc[UNW_PPC64_V22] =
371 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R22, 0);
372 c->dwarf.loc[UNW_PPC64_V23] =
373 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R23, 0);
374 c->dwarf.loc[UNW_PPC64_V24] =
375 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R24, 0);
376 c->dwarf.loc[UNW_PPC64_V25] =
377 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R25, 0);
378 c->dwarf.loc[UNW_PPC64_V26] =
379 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R26, 0);
380 c->dwarf.loc[UNW_PPC64_V27] =
381 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R27, 0);
382 c->dwarf.loc[UNW_PPC64_V28] =
383 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R28, 0);
384 c->dwarf.loc[UNW_PPC64_V29] =
385 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R29, 0);
386 c->dwarf.loc[UNW_PPC64_V30] =
387 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R30, 0);
388 c->dwarf.loc[UNW_PPC64_V31] =
389 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R31, 0);
390 c->dwarf.loc[UNW_PPC64_VRSAVE] =
391 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_VRSAVE, 0);
392 c->dwarf.loc[UNW_PPC64_VSCR] =
393 DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_VSCR, 0);
397 c->dwarf.loc[UNW_PPC64_V0] = DWARF_NULL_LOC;
398 c->dwarf.loc[UNW_PPC64_V1] = DWARF_NULL_LOC;
399 c->dwarf.loc[UNW_PPC64_V2] = DWARF_NULL_LOC;
400 c->dwarf.loc[UNW_PPC64_V3] = DWARF_NULL_LOC;
401 c->dwarf.loc[UNW_PPC64_V4] = DWARF_NULL_LOC;
402 c->dwarf.loc[UNW_PPC64_V5] = DWARF_NULL_LOC;
403 c->dwarf.loc[UNW_PPC64_V6] = DWARF_NULL_LOC;
404 c->dwarf.loc[UNW_PPC64_V7] = DWARF_NULL_LOC;
405 c->dwarf.loc[UNW_PPC64_V8] = DWARF_NULL_LOC;
406 c->dwarf.loc[UNW_PPC64_V9] = DWARF_NULL_LOC;
407 c->dwarf.loc[UNW_PPC64_V10] = DWARF_NULL_LOC;
408 c->dwarf.loc[UNW_PPC64_V11] = DWARF_NULL_LOC;
409 c->dwarf.loc[UNW_PPC64_V12] = DWARF_NULL_LOC;
410 c->dwarf.loc[UNW_PPC64_V13] = DWARF_NULL_LOC;
411 c->dwarf.loc[UNW_PPC64_V14] = DWARF_NULL_LOC;
412 c->dwarf.loc[UNW_PPC64_V15] = DWARF_NULL_LOC;
413 c->dwarf.loc[UNW_PPC64_V16] = DWARF_NULL_LOC;
414 c->dwarf.loc[UNW_PPC64_V17] = DWARF_NULL_LOC;
415 c->dwarf.loc[UNW_PPC64_V18] = DWARF_NULL_LOC;
416 c->dwarf.loc[UNW_PPC64_V19] = DWARF_NULL_LOC;
417 c->dwarf.loc[UNW_PPC64_V20] = DWARF_NULL_LOC;
418 c->dwarf.loc[UNW_PPC64_V21] = DWARF_NULL_LOC;
419 c->dwarf.loc[UNW_PPC64_V22] = DWARF_NULL_LOC;
420 c->dwarf.loc[UNW_PPC64_V23] = DWARF_NULL_LOC;
421 c->dwarf.loc[UNW_PPC64_V24] = DWARF_NULL_LOC;
422 c->dwarf.loc[UNW_PPC64_V25] = DWARF_NULL_LOC;
423 c->dwarf.loc[UNW_PPC64_V26] = DWARF_NULL_LOC;
424 c->dwarf.loc[UNW_PPC64_V27] = DWARF_NULL_LOC;
425 c->dwarf.loc[UNW_PPC64_V28] = DWARF_NULL_LOC;
426 c->dwarf.loc[UNW_PPC64_V29] = DWARF_NULL_LOC;
427 c->dwarf.loc[UNW_PPC64_V30] = DWARF_NULL_LOC;
428 c->dwarf.loc[UNW_PPC64_V31] = DWARF_NULL_LOC;
429 c->dwarf.loc[UNW_PPC64_VRSAVE] = DWARF_NULL_LOC;
430 c->dwarf.loc[UNW_PPC64_VSCR] = DWARF_NULL_LOC;