1 |
227 |
jeremybenn |
/* Target-dependent code for GNU/Linux running on PA-RISC, for GDB.
|
2 |
|
|
|
3 |
|
|
Copyright (C) 2004, 2006, 2007, 2008, 2009, 2010
|
4 |
|
|
Free Software Foundation, Inc.
|
5 |
|
|
|
6 |
|
|
This file is part of GDB.
|
7 |
|
|
|
8 |
|
|
This program is free software; you can redistribute it and/or modify
|
9 |
|
|
it under the terms of the GNU General Public License as published by
|
10 |
|
|
the Free Software Foundation; either version 3 of the License, or
|
11 |
|
|
(at your option) any later version.
|
12 |
|
|
|
13 |
|
|
This program is distributed in the hope that it will be useful,
|
14 |
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
15 |
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
16 |
|
|
GNU General Public License for more details.
|
17 |
|
|
|
18 |
|
|
You should have received a copy of the GNU General Public License
|
19 |
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
20 |
|
|
|
21 |
|
|
#include "defs.h"
|
22 |
|
|
#include "gdbcore.h"
|
23 |
|
|
#include "osabi.h"
|
24 |
|
|
#include "target.h"
|
25 |
|
|
#include "objfiles.h"
|
26 |
|
|
#include "solib-svr4.h"
|
27 |
|
|
#include "glibc-tdep.h"
|
28 |
|
|
#include "frame-unwind.h"
|
29 |
|
|
#include "trad-frame.h"
|
30 |
|
|
#include "dwarf2-frame.h"
|
31 |
|
|
#include "value.h"
|
32 |
|
|
#include "regset.h"
|
33 |
|
|
#include "regcache.h"
|
34 |
|
|
#include "hppa-tdep.h"
|
35 |
|
|
|
36 |
|
|
#include "elf/common.h"
|
37 |
|
|
|
38 |
|
|
/* Map DWARF DBX register numbers to GDB register numbers. */
|
39 |
|
|
static int
|
40 |
|
|
hppa_dwarf_reg_to_regnum (struct gdbarch *gdbarch, int reg)
|
41 |
|
|
{
|
42 |
|
|
/* The general registers and the sar are the same in both sets. */
|
43 |
|
|
if (reg <= 32)
|
44 |
|
|
return reg;
|
45 |
|
|
|
46 |
|
|
/* fr4-fr31 (left and right halves) are mapped from 72. */
|
47 |
|
|
if (reg >= 72 && reg <= 72 + 28 * 2)
|
48 |
|
|
return HPPA_FP4_REGNUM + (reg - 72);
|
49 |
|
|
|
50 |
|
|
warning (_("Unmapped DWARF DBX Register #%d encountered."), reg);
|
51 |
|
|
return -1;
|
52 |
|
|
}
|
53 |
|
|
|
54 |
|
|
static void
|
55 |
|
|
hppa_linux_target_write_pc (struct regcache *regcache, CORE_ADDR v)
|
56 |
|
|
{
|
57 |
|
|
/* Probably this should be done by the kernel, but it isn't. */
|
58 |
|
|
regcache_cooked_write_unsigned (regcache, HPPA_PCOQ_HEAD_REGNUM, v | 0x3);
|
59 |
|
|
regcache_cooked_write_unsigned (regcache, HPPA_PCOQ_TAIL_REGNUM, (v + 4) | 0x3);
|
60 |
|
|
}
|
61 |
|
|
|
62 |
|
|
/* An instruction to match. */
|
63 |
|
|
struct insn_pattern
|
64 |
|
|
{
|
65 |
|
|
unsigned int data; /* See if it matches this.... */
|
66 |
|
|
unsigned int mask; /* ... with this mask. */
|
67 |
|
|
};
|
68 |
|
|
|
69 |
|
|
static struct insn_pattern hppa_sigtramp[] = {
|
70 |
|
|
/* ldi 0, %r25 or ldi 1, %r25 */
|
71 |
|
|
{ 0x34190000, 0xfffffffd },
|
72 |
|
|
/* ldi __NR_rt_sigreturn, %r20 */
|
73 |
|
|
{ 0x3414015a, 0xffffffff },
|
74 |
|
|
/* be,l 0x100(%sr2, %r0), %sr0, %r31 */
|
75 |
|
|
{ 0xe4008200, 0xffffffff },
|
76 |
|
|
/* nop */
|
77 |
|
|
{ 0x08000240, 0xffffffff },
|
78 |
|
|
{ 0, 0 }
|
79 |
|
|
};
|
80 |
|
|
|
81 |
|
|
#define HPPA_MAX_INSN_PATTERN_LEN (4)
|
82 |
|
|
|
83 |
|
|
/* Return non-zero if the instructions at PC match the series
|
84 |
|
|
described in PATTERN, or zero otherwise. PATTERN is an array of
|
85 |
|
|
'struct insn_pattern' objects, terminated by an entry whose mask is
|
86 |
|
|
zero.
|
87 |
|
|
|
88 |
|
|
When the match is successful, fill INSN[i] with what PATTERN[i]
|
89 |
|
|
matched. */
|
90 |
|
|
static int
|
91 |
|
|
insns_match_pattern (struct gdbarch *gdbarch, CORE_ADDR pc,
|
92 |
|
|
struct insn_pattern *pattern,
|
93 |
|
|
unsigned int *insn)
|
94 |
|
|
{
|
95 |
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
96 |
|
|
int i;
|
97 |
|
|
CORE_ADDR npc = pc;
|
98 |
|
|
|
99 |
|
|
for (i = 0; pattern[i].mask; i++)
|
100 |
|
|
{
|
101 |
|
|
char buf[4];
|
102 |
|
|
|
103 |
|
|
target_read_memory (npc, buf, 4);
|
104 |
|
|
insn[i] = extract_unsigned_integer (buf, 4, byte_order);
|
105 |
|
|
if ((insn[i] & pattern[i].mask) == pattern[i].data)
|
106 |
|
|
npc += 4;
|
107 |
|
|
else
|
108 |
|
|
return 0;
|
109 |
|
|
}
|
110 |
|
|
return 1;
|
111 |
|
|
}
|
112 |
|
|
|
113 |
|
|
/* Signal frames. */
|
114 |
|
|
|
115 |
|
|
/* (This is derived from MD_FALLBACK_FRAME_STATE_FOR in gcc.)
|
116 |
|
|
|
117 |
|
|
Unfortunately, because of various bugs and changes to the kernel,
|
118 |
|
|
we have several cases to deal with.
|
119 |
|
|
|
120 |
|
|
In 2.4, the signal trampoline is 4 bytes, and pc should point directly at
|
121 |
|
|
the beginning of the trampoline and struct rt_sigframe.
|
122 |
|
|
|
123 |
|
|
In <= 2.6.5-rc2-pa3, the signal trampoline is 9 bytes, and pc points at
|
124 |
|
|
the 4th word in the trampoline structure. This is wrong, it should point
|
125 |
|
|
at the 5th word. This is fixed in 2.6.5-rc2-pa4.
|
126 |
|
|
|
127 |
|
|
To detect these cases, we first take pc, align it to 64-bytes
|
128 |
|
|
to get the beginning of the signal frame, and then check offsets 0, 4
|
129 |
|
|
and 5 to see if we found the beginning of the trampoline. This will
|
130 |
|
|
tell us how to locate the sigcontext structure.
|
131 |
|
|
|
132 |
|
|
Note that with a 2.4 64-bit kernel, the signal context is not properly
|
133 |
|
|
passed back to userspace so the unwind will not work correctly. */
|
134 |
|
|
static CORE_ADDR
|
135 |
|
|
hppa_linux_sigtramp_find_sigcontext (struct gdbarch *gdbarch, CORE_ADDR pc)
|
136 |
|
|
{
|
137 |
|
|
unsigned int dummy[HPPA_MAX_INSN_PATTERN_LEN];
|
138 |
|
|
int offs = 0;
|
139 |
|
|
int try;
|
140 |
|
|
/* offsets to try to find the trampoline */
|
141 |
|
|
static int pcoffs[] = { 0, 4*4, 5*4 };
|
142 |
|
|
/* offsets to the rt_sigframe structure */
|
143 |
|
|
static int sfoffs[] = { 4*4, 10*4, 10*4 };
|
144 |
|
|
CORE_ADDR sp;
|
145 |
|
|
|
146 |
|
|
/* Most of the time, this will be correct. The one case when this will
|
147 |
|
|
fail is if the user defined an alternate stack, in which case the
|
148 |
|
|
beginning of the stack will not be align_down (pc, 64). */
|
149 |
|
|
sp = align_down (pc, 64);
|
150 |
|
|
|
151 |
|
|
/* rt_sigreturn trampoline:
|
152 |
|
|
3419000x ldi 0, %r25 or ldi 1, %r25 (x = 0 or 2)
|
153 |
|
|
3414015a ldi __NR_rt_sigreturn, %r20
|
154 |
|
|
e4008200 be,l 0x100(%sr2, %r0), %sr0, %r31
|
155 |
|
|
08000240 nop */
|
156 |
|
|
|
157 |
|
|
for (try = 0; try < ARRAY_SIZE (pcoffs); try++)
|
158 |
|
|
{
|
159 |
|
|
if (insns_match_pattern (gdbarch, sp + pcoffs[try],
|
160 |
|
|
hppa_sigtramp, dummy))
|
161 |
|
|
{
|
162 |
|
|
offs = sfoffs[try];
|
163 |
|
|
break;
|
164 |
|
|
}
|
165 |
|
|
}
|
166 |
|
|
|
167 |
|
|
if (offs == 0)
|
168 |
|
|
{
|
169 |
|
|
if (insns_match_pattern (gdbarch, pc, hppa_sigtramp, dummy))
|
170 |
|
|
{
|
171 |
|
|
/* sigaltstack case: we have no way of knowing which offset to
|
172 |
|
|
use in this case; default to new kernel handling. If this is
|
173 |
|
|
wrong the unwinding will fail. */
|
174 |
|
|
try = 2;
|
175 |
|
|
sp = pc - pcoffs[try];
|
176 |
|
|
}
|
177 |
|
|
else
|
178 |
|
|
{
|
179 |
|
|
return 0;
|
180 |
|
|
}
|
181 |
|
|
}
|
182 |
|
|
|
183 |
|
|
/* sp + sfoffs[try] points to a struct rt_sigframe, which contains
|
184 |
|
|
a struct siginfo and a struct ucontext. struct ucontext contains
|
185 |
|
|
a struct sigcontext. Return an offset to this sigcontext here. Too
|
186 |
|
|
bad we cannot include system specific headers :-(.
|
187 |
|
|
sizeof(struct siginfo) == 128
|
188 |
|
|
offsetof(struct ucontext, uc_mcontext) == 24. */
|
189 |
|
|
return sp + sfoffs[try] + 128 + 24;
|
190 |
|
|
}
|
191 |
|
|
|
192 |
|
|
struct hppa_linux_sigtramp_unwind_cache
|
193 |
|
|
{
|
194 |
|
|
CORE_ADDR base;
|
195 |
|
|
struct trad_frame_saved_reg *saved_regs;
|
196 |
|
|
};
|
197 |
|
|
|
198 |
|
|
static struct hppa_linux_sigtramp_unwind_cache *
|
199 |
|
|
hppa_linux_sigtramp_frame_unwind_cache (struct frame_info *this_frame,
|
200 |
|
|
void **this_cache)
|
201 |
|
|
{
|
202 |
|
|
struct gdbarch *gdbarch = get_frame_arch (this_frame);
|
203 |
|
|
struct hppa_linux_sigtramp_unwind_cache *info;
|
204 |
|
|
CORE_ADDR pc, scptr;
|
205 |
|
|
int i;
|
206 |
|
|
|
207 |
|
|
if (*this_cache)
|
208 |
|
|
return *this_cache;
|
209 |
|
|
|
210 |
|
|
info = FRAME_OBSTACK_ZALLOC (struct hppa_linux_sigtramp_unwind_cache);
|
211 |
|
|
*this_cache = info;
|
212 |
|
|
info->saved_regs = trad_frame_alloc_saved_regs (this_frame);
|
213 |
|
|
|
214 |
|
|
pc = get_frame_pc (this_frame);
|
215 |
|
|
scptr = hppa_linux_sigtramp_find_sigcontext (gdbarch, pc);
|
216 |
|
|
|
217 |
|
|
/* structure of struct sigcontext:
|
218 |
|
|
|
219 |
|
|
struct sigcontext {
|
220 |
|
|
unsigned long sc_flags;
|
221 |
|
|
unsigned long sc_gr[32];
|
222 |
|
|
unsigned long long sc_fr[32];
|
223 |
|
|
unsigned long sc_iasq[2];
|
224 |
|
|
unsigned long sc_iaoq[2];
|
225 |
|
|
unsigned long sc_sar; */
|
226 |
|
|
|
227 |
|
|
/* Skip sc_flags. */
|
228 |
|
|
scptr += 4;
|
229 |
|
|
|
230 |
|
|
/* GR[0] is the psw. */
|
231 |
|
|
info->saved_regs[HPPA_IPSW_REGNUM].addr = scptr;
|
232 |
|
|
scptr += 4;
|
233 |
|
|
|
234 |
|
|
/* General registers. */
|
235 |
|
|
for (i = 1; i < 32; i++)
|
236 |
|
|
{
|
237 |
|
|
info->saved_regs[HPPA_R0_REGNUM + i].addr = scptr;
|
238 |
|
|
scptr += 4;
|
239 |
|
|
}
|
240 |
|
|
|
241 |
|
|
/* Pad to long long boundary. */
|
242 |
|
|
scptr += 4;
|
243 |
|
|
|
244 |
|
|
/* FP regs; FP0-3 are not restored. */
|
245 |
|
|
scptr += (8 * 4);
|
246 |
|
|
|
247 |
|
|
for (i = 4; i < 32; i++)
|
248 |
|
|
{
|
249 |
|
|
info->saved_regs[HPPA_FP0_REGNUM + (i * 2)].addr = scptr;
|
250 |
|
|
scptr += 4;
|
251 |
|
|
info->saved_regs[HPPA_FP0_REGNUM + (i * 2) + 1].addr = scptr;
|
252 |
|
|
scptr += 4;
|
253 |
|
|
}
|
254 |
|
|
|
255 |
|
|
/* IASQ/IAOQ. */
|
256 |
|
|
info->saved_regs[HPPA_PCSQ_HEAD_REGNUM].addr = scptr;
|
257 |
|
|
scptr += 4;
|
258 |
|
|
info->saved_regs[HPPA_PCSQ_TAIL_REGNUM].addr = scptr;
|
259 |
|
|
scptr += 4;
|
260 |
|
|
|
261 |
|
|
info->saved_regs[HPPA_PCOQ_HEAD_REGNUM].addr = scptr;
|
262 |
|
|
scptr += 4;
|
263 |
|
|
info->saved_regs[HPPA_PCOQ_TAIL_REGNUM].addr = scptr;
|
264 |
|
|
scptr += 4;
|
265 |
|
|
|
266 |
|
|
info->saved_regs[HPPA_SAR_REGNUM].addr = scptr;
|
267 |
|
|
|
268 |
|
|
info->base = get_frame_register_unsigned (this_frame, HPPA_SP_REGNUM);
|
269 |
|
|
|
270 |
|
|
return info;
|
271 |
|
|
}
|
272 |
|
|
|
273 |
|
|
static void
|
274 |
|
|
hppa_linux_sigtramp_frame_this_id (struct frame_info *this_frame,
|
275 |
|
|
void **this_prologue_cache,
|
276 |
|
|
struct frame_id *this_id)
|
277 |
|
|
{
|
278 |
|
|
struct hppa_linux_sigtramp_unwind_cache *info
|
279 |
|
|
= hppa_linux_sigtramp_frame_unwind_cache (this_frame, this_prologue_cache);
|
280 |
|
|
*this_id = frame_id_build (info->base, get_frame_pc (this_frame));
|
281 |
|
|
}
|
282 |
|
|
|
283 |
|
|
static struct value *
|
284 |
|
|
hppa_linux_sigtramp_frame_prev_register (struct frame_info *this_frame,
|
285 |
|
|
void **this_prologue_cache,
|
286 |
|
|
int regnum)
|
287 |
|
|
{
|
288 |
|
|
struct hppa_linux_sigtramp_unwind_cache *info
|
289 |
|
|
= hppa_linux_sigtramp_frame_unwind_cache (this_frame, this_prologue_cache);
|
290 |
|
|
return hppa_frame_prev_register_helper (this_frame,
|
291 |
|
|
info->saved_regs, regnum);
|
292 |
|
|
}
|
293 |
|
|
|
294 |
|
|
/* hppa-linux always uses "new-style" rt-signals. The signal handler's return
|
295 |
|
|
address should point to a signal trampoline on the stack. The signal
|
296 |
|
|
trampoline is embedded in a rt_sigframe structure that is aligned on
|
297 |
|
|
the stack. We take advantage of the fact that sp must be 64-byte aligned,
|
298 |
|
|
and the trampoline is small, so by rounding down the trampoline address
|
299 |
|
|
we can find the beginning of the struct rt_sigframe. */
|
300 |
|
|
static int
|
301 |
|
|
hppa_linux_sigtramp_frame_sniffer (const struct frame_unwind *self,
|
302 |
|
|
struct frame_info *this_frame,
|
303 |
|
|
void **this_prologue_cache)
|
304 |
|
|
{
|
305 |
|
|
struct gdbarch *gdbarch = get_frame_arch (this_frame);
|
306 |
|
|
CORE_ADDR pc = get_frame_pc (this_frame);
|
307 |
|
|
|
308 |
|
|
if (hppa_linux_sigtramp_find_sigcontext (gdbarch, pc))
|
309 |
|
|
return 1;
|
310 |
|
|
|
311 |
|
|
return 0;
|
312 |
|
|
}
|
313 |
|
|
|
314 |
|
|
static const struct frame_unwind hppa_linux_sigtramp_frame_unwind = {
|
315 |
|
|
SIGTRAMP_FRAME,
|
316 |
|
|
hppa_linux_sigtramp_frame_this_id,
|
317 |
|
|
hppa_linux_sigtramp_frame_prev_register,
|
318 |
|
|
NULL,
|
319 |
|
|
hppa_linux_sigtramp_frame_sniffer
|
320 |
|
|
};
|
321 |
|
|
|
322 |
|
|
/* Attempt to find (and return) the global pointer for the given
|
323 |
|
|
function.
|
324 |
|
|
|
325 |
|
|
This is a rather nasty bit of code searchs for the .dynamic section
|
326 |
|
|
in the objfile corresponding to the pc of the function we're trying
|
327 |
|
|
to call. Once it finds the addresses at which the .dynamic section
|
328 |
|
|
lives in the child process, it scans the Elf32_Dyn entries for a
|
329 |
|
|
DT_PLTGOT tag. If it finds one of these, the corresponding
|
330 |
|
|
d_un.d_ptr value is the global pointer. */
|
331 |
|
|
|
332 |
|
|
static CORE_ADDR
|
333 |
|
|
hppa_linux_find_global_pointer (struct gdbarch *gdbarch, struct value *function)
|
334 |
|
|
{
|
335 |
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
336 |
|
|
struct obj_section *faddr_sect;
|
337 |
|
|
CORE_ADDR faddr;
|
338 |
|
|
|
339 |
|
|
faddr = value_as_address (function);
|
340 |
|
|
|
341 |
|
|
/* Is this a plabel? If so, dereference it to get the gp value. */
|
342 |
|
|
if (faddr & 2)
|
343 |
|
|
{
|
344 |
|
|
int status;
|
345 |
|
|
char buf[4];
|
346 |
|
|
|
347 |
|
|
faddr &= ~3;
|
348 |
|
|
|
349 |
|
|
status = target_read_memory (faddr + 4, buf, sizeof (buf));
|
350 |
|
|
if (status == 0)
|
351 |
|
|
return extract_unsigned_integer (buf, sizeof (buf), byte_order);
|
352 |
|
|
}
|
353 |
|
|
|
354 |
|
|
/* If the address is in the plt section, then the real function hasn't
|
355 |
|
|
yet been fixed up by the linker so we cannot determine the gp of
|
356 |
|
|
that function. */
|
357 |
|
|
if (in_plt_section (faddr, NULL))
|
358 |
|
|
return 0;
|
359 |
|
|
|
360 |
|
|
faddr_sect = find_pc_section (faddr);
|
361 |
|
|
if (faddr_sect != NULL)
|
362 |
|
|
{
|
363 |
|
|
struct obj_section *osect;
|
364 |
|
|
|
365 |
|
|
ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect)
|
366 |
|
|
{
|
367 |
|
|
if (strcmp (osect->the_bfd_section->name, ".dynamic") == 0)
|
368 |
|
|
break;
|
369 |
|
|
}
|
370 |
|
|
|
371 |
|
|
if (osect < faddr_sect->objfile->sections_end)
|
372 |
|
|
{
|
373 |
|
|
CORE_ADDR addr, endaddr;
|
374 |
|
|
|
375 |
|
|
addr = obj_section_addr (osect);
|
376 |
|
|
endaddr = obj_section_endaddr (osect);
|
377 |
|
|
|
378 |
|
|
while (addr < endaddr)
|
379 |
|
|
{
|
380 |
|
|
int status;
|
381 |
|
|
LONGEST tag;
|
382 |
|
|
char buf[4];
|
383 |
|
|
|
384 |
|
|
status = target_read_memory (addr, buf, sizeof (buf));
|
385 |
|
|
if (status != 0)
|
386 |
|
|
break;
|
387 |
|
|
tag = extract_signed_integer (buf, sizeof (buf), byte_order);
|
388 |
|
|
|
389 |
|
|
if (tag == DT_PLTGOT)
|
390 |
|
|
{
|
391 |
|
|
CORE_ADDR global_pointer;
|
392 |
|
|
|
393 |
|
|
status = target_read_memory (addr + 4, buf, sizeof (buf));
|
394 |
|
|
if (status != 0)
|
395 |
|
|
break;
|
396 |
|
|
global_pointer = extract_unsigned_integer (buf, sizeof (buf),
|
397 |
|
|
byte_order);
|
398 |
|
|
/* The payoff... */
|
399 |
|
|
return global_pointer;
|
400 |
|
|
}
|
401 |
|
|
|
402 |
|
|
if (tag == DT_NULL)
|
403 |
|
|
break;
|
404 |
|
|
|
405 |
|
|
addr += 8;
|
406 |
|
|
}
|
407 |
|
|
}
|
408 |
|
|
}
|
409 |
|
|
return 0;
|
410 |
|
|
}
|
411 |
|
|
|
412 |
|
|
/*
|
413 |
|
|
* Registers saved in a coredump:
|
414 |
|
|
* gr0..gr31
|
415 |
|
|
* sr0..sr7
|
416 |
|
|
* iaoq0..iaoq1
|
417 |
|
|
* iasq0..iasq1
|
418 |
|
|
* sar, iir, isr, ior, ipsw
|
419 |
|
|
* cr0, cr24..cr31
|
420 |
|
|
* cr8,9,12,13
|
421 |
|
|
* cr10, cr15
|
422 |
|
|
*/
|
423 |
|
|
|
424 |
|
|
#define GR_REGNUM(_n) (HPPA_R0_REGNUM+_n)
|
425 |
|
|
#define TR_REGNUM(_n) (HPPA_TR0_REGNUM+_n)
|
426 |
|
|
static const int greg_map[] =
|
427 |
|
|
{
|
428 |
|
|
GR_REGNUM(0), GR_REGNUM(1), GR_REGNUM(2), GR_REGNUM(3),
|
429 |
|
|
GR_REGNUM(4), GR_REGNUM(5), GR_REGNUM(6), GR_REGNUM(7),
|
430 |
|
|
GR_REGNUM(8), GR_REGNUM(9), GR_REGNUM(10), GR_REGNUM(11),
|
431 |
|
|
GR_REGNUM(12), GR_REGNUM(13), GR_REGNUM(14), GR_REGNUM(15),
|
432 |
|
|
GR_REGNUM(16), GR_REGNUM(17), GR_REGNUM(18), GR_REGNUM(19),
|
433 |
|
|
GR_REGNUM(20), GR_REGNUM(21), GR_REGNUM(22), GR_REGNUM(23),
|
434 |
|
|
GR_REGNUM(24), GR_REGNUM(25), GR_REGNUM(26), GR_REGNUM(27),
|
435 |
|
|
GR_REGNUM(28), GR_REGNUM(29), GR_REGNUM(30), GR_REGNUM(31),
|
436 |
|
|
|
437 |
|
|
HPPA_SR4_REGNUM+1, HPPA_SR4_REGNUM+2, HPPA_SR4_REGNUM+3, HPPA_SR4_REGNUM+4,
|
438 |
|
|
HPPA_SR4_REGNUM, HPPA_SR4_REGNUM+5, HPPA_SR4_REGNUM+6, HPPA_SR4_REGNUM+7,
|
439 |
|
|
|
440 |
|
|
HPPA_PCOQ_HEAD_REGNUM, HPPA_PCOQ_TAIL_REGNUM,
|
441 |
|
|
HPPA_PCSQ_HEAD_REGNUM, HPPA_PCSQ_TAIL_REGNUM,
|
442 |
|
|
|
443 |
|
|
HPPA_SAR_REGNUM, HPPA_IIR_REGNUM, HPPA_ISR_REGNUM, HPPA_IOR_REGNUM,
|
444 |
|
|
HPPA_IPSW_REGNUM, HPPA_RCR_REGNUM,
|
445 |
|
|
|
446 |
|
|
TR_REGNUM(0), TR_REGNUM(1), TR_REGNUM(2), TR_REGNUM(3),
|
447 |
|
|
TR_REGNUM(4), TR_REGNUM(5), TR_REGNUM(6), TR_REGNUM(7),
|
448 |
|
|
|
449 |
|
|
HPPA_PID0_REGNUM, HPPA_PID1_REGNUM, HPPA_PID2_REGNUM, HPPA_PID3_REGNUM,
|
450 |
|
|
HPPA_CCR_REGNUM, HPPA_EIEM_REGNUM,
|
451 |
|
|
};
|
452 |
|
|
|
453 |
|
|
static void
|
454 |
|
|
hppa_linux_supply_regset (const struct regset *regset,
|
455 |
|
|
struct regcache *regcache,
|
456 |
|
|
int regnum, const void *regs, size_t len)
|
457 |
|
|
{
|
458 |
|
|
struct gdbarch *arch = get_regcache_arch (regcache);
|
459 |
|
|
struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
|
460 |
|
|
const char *buf = regs;
|
461 |
|
|
int i, offset;
|
462 |
|
|
|
463 |
|
|
offset = 0;
|
464 |
|
|
for (i = 0; i < ARRAY_SIZE (greg_map); i++)
|
465 |
|
|
{
|
466 |
|
|
if (regnum == greg_map[i] || regnum == -1)
|
467 |
|
|
regcache_raw_supply (regcache, greg_map[i], buf + offset);
|
468 |
|
|
|
469 |
|
|
offset += tdep->bytes_per_address;
|
470 |
|
|
}
|
471 |
|
|
}
|
472 |
|
|
|
473 |
|
|
static void
|
474 |
|
|
hppa_linux_supply_fpregset (const struct regset *regset,
|
475 |
|
|
struct regcache *regcache,
|
476 |
|
|
int regnum, const void *regs, size_t len)
|
477 |
|
|
{
|
478 |
|
|
const char *buf = regs;
|
479 |
|
|
int i, offset;
|
480 |
|
|
|
481 |
|
|
offset = 0;
|
482 |
|
|
for (i = 0; i < 64; i++)
|
483 |
|
|
{
|
484 |
|
|
if (regnum == HPPA_FP0_REGNUM + i || regnum == -1)
|
485 |
|
|
regcache_raw_supply (regcache, HPPA_FP0_REGNUM + i,
|
486 |
|
|
buf + offset);
|
487 |
|
|
offset += 4;
|
488 |
|
|
}
|
489 |
|
|
}
|
490 |
|
|
|
491 |
|
|
/* HPPA Linux kernel register set. */
|
492 |
|
|
static struct regset hppa_linux_regset =
|
493 |
|
|
{
|
494 |
|
|
NULL,
|
495 |
|
|
hppa_linux_supply_regset
|
496 |
|
|
};
|
497 |
|
|
|
498 |
|
|
static struct regset hppa_linux_fpregset =
|
499 |
|
|
{
|
500 |
|
|
NULL,
|
501 |
|
|
hppa_linux_supply_fpregset
|
502 |
|
|
};
|
503 |
|
|
|
504 |
|
|
static const struct regset *
|
505 |
|
|
hppa_linux_regset_from_core_section (struct gdbarch *gdbarch,
|
506 |
|
|
const char *sect_name,
|
507 |
|
|
size_t sect_size)
|
508 |
|
|
{
|
509 |
|
|
if (strcmp (sect_name, ".reg") == 0)
|
510 |
|
|
return &hppa_linux_regset;
|
511 |
|
|
else if (strcmp (sect_name, ".reg2") == 0)
|
512 |
|
|
return &hppa_linux_fpregset;
|
513 |
|
|
|
514 |
|
|
return NULL;
|
515 |
|
|
}
|
516 |
|
|
|
517 |
|
|
|
518 |
|
|
/* Forward declarations. */
|
519 |
|
|
extern initialize_file_ftype _initialize_hppa_linux_tdep;
|
520 |
|
|
|
521 |
|
|
static void
|
522 |
|
|
hppa_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
|
523 |
|
|
{
|
524 |
|
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
525 |
|
|
|
526 |
|
|
/* GNU/Linux is always ELF. */
|
527 |
|
|
tdep->is_elf = 1;
|
528 |
|
|
|
529 |
|
|
tdep->find_global_pointer = hppa_linux_find_global_pointer;
|
530 |
|
|
|
531 |
|
|
set_gdbarch_write_pc (gdbarch, hppa_linux_target_write_pc);
|
532 |
|
|
|
533 |
|
|
frame_unwind_append_unwinder (gdbarch, &hppa_linux_sigtramp_frame_unwind);
|
534 |
|
|
|
535 |
|
|
/* GNU/Linux uses SVR4-style shared libraries. */
|
536 |
|
|
set_solib_svr4_fetch_link_map_offsets
|
537 |
|
|
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
|
538 |
|
|
|
539 |
|
|
tdep->in_solib_call_trampoline = hppa_in_solib_call_trampoline;
|
540 |
|
|
set_gdbarch_skip_trampoline_code (gdbarch, hppa_skip_trampoline_code);
|
541 |
|
|
|
542 |
|
|
/* GNU/Linux uses the dynamic linker included in the GNU C Library. */
|
543 |
|
|
set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
|
544 |
|
|
|
545 |
|
|
/* On hppa-linux, currently, sizeof(long double) == 8. There has been
|
546 |
|
|
some discussions to support 128-bit long double, but it requires some
|
547 |
|
|
more work in gcc and glibc first. */
|
548 |
|
|
set_gdbarch_long_double_bit (gdbarch, 64);
|
549 |
|
|
|
550 |
|
|
set_gdbarch_regset_from_core_section
|
551 |
|
|
(gdbarch, hppa_linux_regset_from_core_section);
|
552 |
|
|
|
553 |
|
|
set_gdbarch_dwarf2_reg_to_regnum (gdbarch, hppa_dwarf_reg_to_regnum);
|
554 |
|
|
|
555 |
|
|
/* Enable TLS support. */
|
556 |
|
|
set_gdbarch_fetch_tls_load_module_address (gdbarch,
|
557 |
|
|
svr4_fetch_objfile_link_map);
|
558 |
|
|
}
|
559 |
|
|
|
560 |
|
|
void
|
561 |
|
|
_initialize_hppa_linux_tdep (void)
|
562 |
|
|
{
|
563 |
|
|
gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_LINUX, hppa_linux_init_abi);
|
564 |
|
|
gdbarch_register_osabi (bfd_arch_hppa, bfd_mach_hppa20w, GDB_OSABI_LINUX, hppa_linux_init_abi);
|
565 |
|
|
}
|