mn10300-linux-tdep.c revision 1.5 
1/* Target-dependent code for the Matsushita MN10300 for GDB, the GNU debugger.
2
3   Copyright (C) 2003-2015 Free Software Foundation, Inc.
4
5   This file is part of GDB.
6
7   This program is free software; you can redistribute it and/or modify
8   it under the terms of the GNU General Public License as published by
9   the Free Software Foundation; either version 3 of the License, or
10   (at your option) any later version.
11
12   This program is distributed in the hope that it will be useful,
13   but WITHOUT ANY WARRANTY; without even the implied warranty of
14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   GNU General Public License for more details.
16
17   You should have received a copy of the GNU General Public License
18   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
19
20#include "defs.h"
21#include "gdbcore.h"
22#include "regcache.h"
23#include "mn10300-tdep.h"
24#include "bfd.h"
25#include "elf-bfd.h"
26#include "osabi.h"
27#include "regset.h"
28#include "solib-svr4.h"
29#include "frame.h"
30#include "trad-frame.h"
31#include "tramp-frame.h"
32#include "linux-tdep.h"
33
34/* Transliterated from <asm-mn10300/elf.h>...  */
35#define MN10300_ELF_NGREG 28
36#define MN10300_ELF_NFPREG 32
37
38typedef gdb_byte   mn10300_elf_greg_t[4];
39typedef mn10300_elf_greg_t mn10300_elf_gregset_t[MN10300_ELF_NGREG];
40
41typedef gdb_byte   mn10300_elf_fpreg_t[4];
42typedef struct
43{
44  mn10300_elf_fpreg_t fpregs[MN10300_ELF_NFPREG];
45  gdb_byte    fpcr[4];
46} mn10300_elf_fpregset_t;
47
48/* elf_gregset_t register indices stolen from include/asm-mn10300/ptrace.h.  */
49#define MN10300_ELF_GREGSET_T_REG_INDEX_A3	0
50#define MN10300_ELF_GREGSET_T_REG_INDEX_A2	1
51#define MN10300_ELF_GREGSET_T_REG_INDEX_D3	2
52#define	MN10300_ELF_GREGSET_T_REG_INDEX_D2	3
53#define MN10300_ELF_GREGSET_T_REG_INDEX_MCVF	4
54#define	MN10300_ELF_GREGSET_T_REG_INDEX_MCRL	5
55#define MN10300_ELF_GREGSET_T_REG_INDEX_MCRH	6
56#define	MN10300_ELF_GREGSET_T_REG_INDEX_MDRQ	7
57#define	MN10300_ELF_GREGSET_T_REG_INDEX_E1	8
58#define	MN10300_ELF_GREGSET_T_REG_INDEX_E0	9
59#define	MN10300_ELF_GREGSET_T_REG_INDEX_E7	10
60#define	MN10300_ELF_GREGSET_T_REG_INDEX_E6	11
61#define	MN10300_ELF_GREGSET_T_REG_INDEX_E5	12
62#define	MN10300_ELF_GREGSET_T_REG_INDEX_E4	13
63#define	MN10300_ELF_GREGSET_T_REG_INDEX_E3	14
64#define	MN10300_ELF_GREGSET_T_REG_INDEX_E2	15
65#define	MN10300_ELF_GREGSET_T_REG_INDEX_SP	16
66#define	MN10300_ELF_GREGSET_T_REG_INDEX_LAR	17
67#define	MN10300_ELF_GREGSET_T_REG_INDEX_LIR	18
68#define	MN10300_ELF_GREGSET_T_REG_INDEX_MDR	19
69#define	MN10300_ELF_GREGSET_T_REG_INDEX_A1	20
70#define	MN10300_ELF_GREGSET_T_REG_INDEX_A0	21
71#define	MN10300_ELF_GREGSET_T_REG_INDEX_D1	22
72#define	MN10300_ELF_GREGSET_T_REG_INDEX_D0	23
73#define MN10300_ELF_GREGSET_T_REG_INDEX_ORIG_D0	24
74#define	MN10300_ELF_GREGSET_T_REG_INDEX_EPSW	25
75#define	MN10300_ELF_GREGSET_T_REG_INDEX_PC	26
76
77/* New gdbarch API for corefile registers.
78   Given a section name and size, create a struct reg object
79   with a supply_register and a collect_register method.  */
80
81/* Copy register value of REGNUM from regset to regcache.
82   If REGNUM is -1, do this for all gp registers in regset.  */
83
84static void
85am33_supply_gregset_method (const struct regset *regset,
86			    struct regcache *regcache,
87			    int regnum, const void *gregs, size_t len)
88{
89  char zerobuf[MAX_REGISTER_SIZE];
90  const mn10300_elf_greg_t *regp = (const mn10300_elf_greg_t *) gregs;
91  int i;
92
93  gdb_assert (len >= sizeof (mn10300_elf_gregset_t));
94
95  switch (regnum) {
96  case E_D0_REGNUM:
97    regcache_raw_supply (regcache, E_D0_REGNUM,
98			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D0));
99    break;
100  case E_D1_REGNUM:
101    regcache_raw_supply (regcache, E_D1_REGNUM,
102			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D1));
103    break;
104  case E_D2_REGNUM:
105    regcache_raw_supply (regcache, E_D2_REGNUM,
106			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D2));
107    break;
108  case E_D3_REGNUM:
109    regcache_raw_supply (regcache, E_D3_REGNUM,
110			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D3));
111    break;
112  case E_A0_REGNUM:
113    regcache_raw_supply (regcache, E_A0_REGNUM,
114			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A0));
115    break;
116  case E_A1_REGNUM:
117    regcache_raw_supply (regcache, E_A1_REGNUM,
118			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A1));
119    break;
120  case E_A2_REGNUM:
121    regcache_raw_supply (regcache, E_A2_REGNUM,
122			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A2));
123    break;
124  case E_A3_REGNUM:
125    regcache_raw_supply (regcache, E_A3_REGNUM,
126			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A3));
127    break;
128  case E_SP_REGNUM:
129    regcache_raw_supply (regcache, E_SP_REGNUM,
130			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_SP));
131    break;
132  case E_PC_REGNUM:
133    regcache_raw_supply (regcache, E_PC_REGNUM,
134			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_PC));
135    break;
136  case E_MDR_REGNUM:
137    regcache_raw_supply (regcache, E_MDR_REGNUM,
138			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MDR));
139    break;
140  case E_PSW_REGNUM:
141    regcache_raw_supply (regcache, E_PSW_REGNUM,
142			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_EPSW));
143    break;
144  case E_LIR_REGNUM:
145    regcache_raw_supply (regcache, E_LIR_REGNUM,
146			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_LIR));
147    break;
148  case E_LAR_REGNUM:
149    regcache_raw_supply (regcache, E_LAR_REGNUM,
150			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_LAR));
151    break;
152  case E_MDRQ_REGNUM:
153    regcache_raw_supply (regcache, E_MDRQ_REGNUM,
154			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MDRQ));
155    break;
156  case E_E0_REGNUM:
157    regcache_raw_supply (regcache, E_E0_REGNUM,
158			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E0));
159    break;
160  case E_E1_REGNUM:
161    regcache_raw_supply (regcache, E_E1_REGNUM,
162			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E1));
163    break;
164  case E_E2_REGNUM:
165    regcache_raw_supply (regcache, E_E2_REGNUM,
166			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E2));
167    break;
168  case E_E3_REGNUM:
169    regcache_raw_supply (regcache, E_E3_REGNUM,
170			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E3));
171    break;
172  case E_E4_REGNUM:
173    regcache_raw_supply (regcache, E_E4_REGNUM,
174			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E4));
175    break;
176  case E_E5_REGNUM:
177    regcache_raw_supply (regcache, E_E5_REGNUM,
178			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E5));
179    break;
180  case E_E6_REGNUM:
181    regcache_raw_supply (regcache, E_E6_REGNUM,
182			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E6));
183    break;
184  case E_E7_REGNUM:
185    regcache_raw_supply (regcache, E_E7_REGNUM,
186			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E7));
187    break;
188
189    /* ssp, msp, and usp are inaccessible.  */
190  case E_E8_REGNUM:
191    memset (zerobuf, 0, MAX_REGISTER_SIZE);
192    regcache_raw_supply (regcache, E_E8_REGNUM, zerobuf);
193    break;
194  case E_E9_REGNUM:
195    memset (zerobuf, 0, MAX_REGISTER_SIZE);
196    regcache_raw_supply (regcache, E_E9_REGNUM, zerobuf);
197    break;
198  case E_E10_REGNUM:
199    memset (zerobuf, 0, MAX_REGISTER_SIZE);
200    regcache_raw_supply (regcache, E_E10_REGNUM, zerobuf);
201
202    break;
203  case E_MCRH_REGNUM:
204    regcache_raw_supply (regcache, E_MCRH_REGNUM,
205			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MCRH));
206    break;
207  case E_MCRL_REGNUM:
208    regcache_raw_supply (regcache, E_MCRL_REGNUM,
209			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MCRL));
210    break;
211  case E_MCVF_REGNUM:
212    regcache_raw_supply (regcache, E_MCVF_REGNUM,
213			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MCVF));
214    break;
215  case E_FPCR_REGNUM:
216    /* FPCR is numbered among the GP regs, but handled as an FP reg.
217       Do nothing.  */
218    break;
219  case E_FPCR_REGNUM + 1:
220    /* The two unused registers beyond fpcr are inaccessible.  */
221    memset (zerobuf, 0, MAX_REGISTER_SIZE);
222    regcache_raw_supply (regcache, E_FPCR_REGNUM + 1, zerobuf);
223    break;
224  case E_FPCR_REGNUM + 2:
225    memset (zerobuf, 0, MAX_REGISTER_SIZE);
226    regcache_raw_supply (regcache, E_FPCR_REGNUM + 2, zerobuf);
227    break;
228  default:	/* An error, obviously, but should we error out?  */
229    break;
230  case -1:
231    for (i = 0; i < MN10300_ELF_NGREG; i++)
232      am33_supply_gregset_method (regset, regcache, i, gregs, len);
233    break;
234  }
235  return;
236}
237
238/* Copy fp register value of REGNUM from regset to regcache.
239   If REGNUM is -1, do this for all fp registers in regset.  */
240
241static void
242am33_supply_fpregset_method (const struct regset *regset,
243			     struct regcache *regcache,
244			     int regnum, const void *fpregs, size_t len)
245{
246  const mn10300_elf_fpregset_t *fpregset = fpregs;
247
248  gdb_assert (len >= sizeof (mn10300_elf_fpregset_t));
249
250  if (regnum == -1)
251    {
252      int i;
253
254      for (i = 0; i < MN10300_ELF_NFPREG; i++)
255	am33_supply_fpregset_method (regset, regcache,
256	                             E_FS0_REGNUM + i, fpregs, len);
257      am33_supply_fpregset_method (regset, regcache,
258				   E_FPCR_REGNUM, fpregs, len);
259    }
260  else if (regnum == E_FPCR_REGNUM)
261    regcache_raw_supply (regcache, E_FPCR_REGNUM,
262			 &fpregset->fpcr);
263  else if (E_FS0_REGNUM <= regnum
264	   && regnum < E_FS0_REGNUM + MN10300_ELF_NFPREG)
265    regcache_raw_supply (regcache, regnum,
266			 &fpregset->fpregs[regnum - E_FS0_REGNUM]);
267
268  return;
269}
270
271/* Copy register values from regcache to regset.  */
272
273static void
274am33_collect_gregset_method (const struct regset *regset,
275			     const struct regcache *regcache,
276			     int regnum, void *gregs, size_t len)
277{
278  mn10300_elf_gregset_t *regp = gregs;
279  int i;
280
281  gdb_assert (len >= sizeof (mn10300_elf_gregset_t));
282
283  switch (regnum) {
284  case E_D0_REGNUM:
285    regcache_raw_collect (regcache, E_D0_REGNUM,
286			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D0));
287    break;
288  case E_D1_REGNUM:
289    regcache_raw_collect (regcache, E_D1_REGNUM,
290			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D1));
291    break;
292  case E_D2_REGNUM:
293    regcache_raw_collect (regcache, E_D2_REGNUM,
294			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D2));
295    break;
296  case E_D3_REGNUM:
297    regcache_raw_collect (regcache, E_D3_REGNUM,
298			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D3));
299    break;
300  case E_A0_REGNUM:
301    regcache_raw_collect (regcache, E_A0_REGNUM,
302			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A0));
303    break;
304  case E_A1_REGNUM:
305    regcache_raw_collect (regcache, E_A1_REGNUM,
306			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A1));
307    break;
308  case E_A2_REGNUM:
309    regcache_raw_collect (regcache, E_A2_REGNUM,
310			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A2));
311    break;
312  case E_A3_REGNUM:
313    regcache_raw_collect (regcache, E_A3_REGNUM,
314			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A3));
315    break;
316  case E_SP_REGNUM:
317    regcache_raw_collect (regcache, E_SP_REGNUM,
318			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_SP));
319    break;
320  case E_PC_REGNUM:
321    regcache_raw_collect (regcache, E_PC_REGNUM,
322			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_PC));
323    break;
324  case E_MDR_REGNUM:
325    regcache_raw_collect (regcache, E_MDR_REGNUM,
326			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MDR));
327    break;
328  case E_PSW_REGNUM:
329    regcache_raw_collect (regcache, E_PSW_REGNUM,
330			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_EPSW));
331    break;
332  case E_LIR_REGNUM:
333    regcache_raw_collect (regcache, E_LIR_REGNUM,
334			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_LIR));
335    break;
336  case E_LAR_REGNUM:
337    regcache_raw_collect (regcache, E_LAR_REGNUM,
338			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_LAR));
339    break;
340  case E_MDRQ_REGNUM:
341    regcache_raw_collect (regcache, E_MDRQ_REGNUM,
342			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MDRQ));
343    break;
344  case E_E0_REGNUM:
345    regcache_raw_collect (regcache, E_E0_REGNUM,
346			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E0));
347    break;
348  case E_E1_REGNUM:
349    regcache_raw_collect (regcache, E_E1_REGNUM,
350			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E1));
351    break;
352  case E_E2_REGNUM:
353    regcache_raw_collect (regcache, E_E2_REGNUM,
354			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E2));
355    break;
356  case E_E3_REGNUM:
357    regcache_raw_collect (regcache, E_E3_REGNUM,
358			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E3));
359    break;
360  case E_E4_REGNUM:
361    regcache_raw_collect (regcache, E_E4_REGNUM,
362			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E4));
363    break;
364  case E_E5_REGNUM:
365    regcache_raw_collect (regcache, E_E5_REGNUM,
366			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E5));
367    break;
368  case E_E6_REGNUM:
369    regcache_raw_collect (regcache, E_E6_REGNUM,
370			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E6));
371    break;
372  case E_E7_REGNUM:
373    regcache_raw_collect (regcache, E_E7_REGNUM,
374			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E7));
375    break;
376
377    /* ssp, msp, and usp are inaccessible.  */
378  case E_E8_REGNUM:
379    /* The gregset struct has noplace to put this: do nothing.  */
380    break;
381  case E_E9_REGNUM:
382    /* The gregset struct has noplace to put this: do nothing.  */
383    break;
384  case E_E10_REGNUM:
385    /* The gregset struct has noplace to put this: do nothing.  */
386    break;
387  case E_MCRH_REGNUM:
388    regcache_raw_collect (regcache, E_MCRH_REGNUM,
389			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MCRH));
390    break;
391  case E_MCRL_REGNUM:
392    regcache_raw_collect (regcache, E_MCRL_REGNUM,
393			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MCRL));
394    break;
395  case E_MCVF_REGNUM:
396    regcache_raw_collect (regcache, E_MCVF_REGNUM,
397			 (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MCVF));
398    break;
399  case E_FPCR_REGNUM:
400    /* FPCR is numbered among the GP regs, but handled as an FP reg.
401       Do nothing.  */
402    break;
403  case E_FPCR_REGNUM + 1:
404    /* The gregset struct has noplace to put this: do nothing.  */
405    break;
406  case E_FPCR_REGNUM + 2:
407    /* The gregset struct has noplace to put this: do nothing.  */
408    break;
409  default:	/* An error, obviously, but should we error out?  */
410    break;
411  case -1:
412    for (i = 0; i < MN10300_ELF_NGREG; i++)
413      am33_collect_gregset_method (regset, regcache, i, gregs, len);
414    break;
415  }
416  return;
417}
418
419/* Copy fp register values from regcache to regset.  */
420
421static void
422am33_collect_fpregset_method (const struct regset *regset,
423			      const struct regcache *regcache,
424			      int regnum, void *fpregs, size_t len)
425{
426  mn10300_elf_fpregset_t *fpregset = fpregs;
427
428  gdb_assert (len >= sizeof (mn10300_elf_fpregset_t));
429
430  if (regnum == -1)
431    {
432      int i;
433      for (i = 0; i < MN10300_ELF_NFPREG; i++)
434	am33_collect_fpregset_method (regset, regcache, E_FS0_REGNUM + i,
435	                              fpregs, len);
436      am33_collect_fpregset_method (regset, regcache,
437				    E_FPCR_REGNUM, fpregs, len);
438    }
439  else if (regnum == E_FPCR_REGNUM)
440    regcache_raw_collect (regcache, E_FPCR_REGNUM,
441			  &fpregset->fpcr);
442  else if (E_FS0_REGNUM <= regnum
443           && regnum < E_FS0_REGNUM + MN10300_ELF_NFPREG)
444    regcache_raw_collect (regcache, regnum,
445			  &fpregset->fpregs[regnum - E_FS0_REGNUM]);
446
447  return;
448}
449
450static const struct regset am33_gregset =
451  {
452    NULL, am33_supply_gregset_method, am33_collect_gregset_method
453  };
454
455static const struct regset am33_fpregset =
456  {
457    NULL, am33_supply_fpregset_method, am33_collect_fpregset_method
458  };
459
460/* Iterate over core file register note sections.  */
461
462static void
463am33_iterate_over_regset_sections (struct gdbarch *gdbarch,
464				   iterate_over_regset_sections_cb *cb,
465				   void *cb_data,
466				   const struct regcache *regcache)
467{
468  cb (".reg", sizeof (mn10300_elf_gregset_t), &am33_gregset,
469      NULL, cb_data);
470  cb (".reg2", sizeof(mn10300_elf_fpregset_t), &am33_fpregset,
471      NULL, cb_data);
472}
473
474static void
475am33_linux_sigframe_cache_init (const struct tramp_frame *self,
476                                struct frame_info *this_frame,
477			        struct trad_frame_cache *this_cache,
478			        CORE_ADDR func);
479
480static const struct tramp_frame am33_linux_sigframe = {
481  SIGTRAMP_FRAME,
482  1,
483  {
484    /* mov     119,d0 */
485    { 0x2c, -1 },
486    { 0x77, -1 },
487    { 0x00, -1 },
488    /* syscall 0 */
489    { 0xf0, -1 },
490    { 0xe0, -1 },
491    { TRAMP_SENTINEL_INSN, -1 }
492  },
493  am33_linux_sigframe_cache_init
494};
495
496static const struct tramp_frame am33_linux_rt_sigframe = {
497  SIGTRAMP_FRAME,
498  1,
499  {
500    /* mov     173,d0 */
501    { 0x2c, -1 },
502    { 0xad, -1 },
503    { 0x00, -1 },
504    /* syscall 0 */
505    { 0xf0, -1 },
506    { 0xe0, -1 },
507    { TRAMP_SENTINEL_INSN, -1 }
508  },
509  am33_linux_sigframe_cache_init
510};
511
512/* Relevant struct definitions for signal handling...
513
514From arch/mn10300/kernel/sigframe.h:
515
516struct sigframe
517{
518	void (*pretcode)(void);
519	int sig;
520	struct sigcontext *psc;
521	struct sigcontext sc;
522	struct fpucontext fpuctx;
523	unsigned long extramask[_NSIG_WORDS-1];
524	char retcode[8];
525};
526
527struct rt_sigframe
528{
529	void (*pretcode)(void);
530	int sig;
531	struct siginfo *pinfo;
532	void *puc;
533	struct siginfo info;
534	struct ucontext uc;
535	struct fpucontext fpuctx;
536	char retcode[8];
537};
538
539From include/asm-mn10300/ucontext.h:
540
541struct ucontext {
542	unsigned long	  uc_flags;
543	struct ucontext  *uc_link;
544	stack_t		  uc_stack;
545	struct sigcontext uc_mcontext;
546	sigset_t	  uc_sigmask;
547};
548
549From include/asm-mn10300/sigcontext.h:
550
551struct fpucontext {
552	unsigned long	fs[32];
553	unsigned long	fpcr;
554};
555
556struct sigcontext {
557	unsigned long	d0;
558	unsigned long	d1;
559	unsigned long	d2;
560	unsigned long	d3;
561	unsigned long	a0;
562	unsigned long	a1;
563	unsigned long	a2;
564	unsigned long	a3;
565	unsigned long	e0;
566	unsigned long	e1;
567	unsigned long	e2;
568	unsigned long	e3;
569	unsigned long	e4;
570	unsigned long	e5;
571	unsigned long	e6;
572	unsigned long	e7;
573	unsigned long	lar;
574	unsigned long	lir;
575	unsigned long	mdr;
576	unsigned long	mcvf;
577	unsigned long	mcrl;
578	unsigned long	mcrh;
579	unsigned long	mdrq;
580	unsigned long	sp;
581	unsigned long	epsw;
582	unsigned long	pc;
583	struct fpucontext *fpucontext;
584	unsigned long	oldmask;
585}; */
586
587
588#define AM33_SIGCONTEXT_D0 0
589#define AM33_SIGCONTEXT_D1 4
590#define AM33_SIGCONTEXT_D2 8
591#define AM33_SIGCONTEXT_D3 12
592#define AM33_SIGCONTEXT_A0 16
593#define AM33_SIGCONTEXT_A1 20
594#define AM33_SIGCONTEXT_A2 24
595#define AM33_SIGCONTEXT_A3 28
596#define AM33_SIGCONTEXT_E0 32
597#define AM33_SIGCONTEXT_E1 36
598#define AM33_SIGCONTEXT_E2 40
599#define AM33_SIGCONTEXT_E3 44
600#define AM33_SIGCONTEXT_E4 48
601#define AM33_SIGCONTEXT_E5 52
602#define AM33_SIGCONTEXT_E6 56
603#define AM33_SIGCONTEXT_E7 60
604#define AM33_SIGCONTEXT_LAR 64
605#define AM33_SIGCONTEXT_LIR 68
606#define AM33_SIGCONTEXT_MDR 72
607#define AM33_SIGCONTEXT_MCVF 76
608#define AM33_SIGCONTEXT_MCRL 80
609#define AM33_SIGCONTEXT_MCRH 84
610#define AM33_SIGCONTEXT_MDRQ 88
611#define AM33_SIGCONTEXT_SP 92
612#define AM33_SIGCONTEXT_EPSW 96
613#define AM33_SIGCONTEXT_PC 100
614#define AM33_SIGCONTEXT_FPUCONTEXT 104
615
616
617static void
618am33_linux_sigframe_cache_init (const struct tramp_frame *self,
619                                struct frame_info *this_frame,
620			        struct trad_frame_cache *this_cache,
621			        CORE_ADDR func)
622{
623  CORE_ADDR sc_base, fpubase;
624  int i;
625
626  sc_base = get_frame_register_unsigned (this_frame, E_SP_REGNUM);
627  if (self == &am33_linux_sigframe)
628    {
629      sc_base += 8;
630      sc_base = get_frame_memory_unsigned (this_frame, sc_base, 4);
631    }
632  else
633    {
634      sc_base += 12;
635      sc_base = get_frame_memory_unsigned (this_frame, sc_base, 4);
636      sc_base += 20;
637    }
638
639  trad_frame_set_reg_addr (this_cache, E_D0_REGNUM,
640                           sc_base + AM33_SIGCONTEXT_D0);
641  trad_frame_set_reg_addr (this_cache, E_D1_REGNUM,
642                           sc_base + AM33_SIGCONTEXT_D1);
643  trad_frame_set_reg_addr (this_cache, E_D2_REGNUM,
644                           sc_base + AM33_SIGCONTEXT_D2);
645  trad_frame_set_reg_addr (this_cache, E_D3_REGNUM,
646                           sc_base + AM33_SIGCONTEXT_D3);
647
648  trad_frame_set_reg_addr (this_cache, E_A0_REGNUM,
649                           sc_base + AM33_SIGCONTEXT_A0);
650  trad_frame_set_reg_addr (this_cache, E_A1_REGNUM,
651                           sc_base + AM33_SIGCONTEXT_A1);
652  trad_frame_set_reg_addr (this_cache, E_A2_REGNUM,
653                           sc_base + AM33_SIGCONTEXT_A2);
654  trad_frame_set_reg_addr (this_cache, E_A3_REGNUM,
655                           sc_base + AM33_SIGCONTEXT_A3);
656
657  trad_frame_set_reg_addr (this_cache, E_E0_REGNUM,
658                           sc_base + AM33_SIGCONTEXT_E0);
659  trad_frame_set_reg_addr (this_cache, E_E1_REGNUM,
660                           sc_base + AM33_SIGCONTEXT_E1);
661  trad_frame_set_reg_addr (this_cache, E_E2_REGNUM,
662                           sc_base + AM33_SIGCONTEXT_E2);
663  trad_frame_set_reg_addr (this_cache, E_E3_REGNUM,
664                           sc_base + AM33_SIGCONTEXT_E3);
665  trad_frame_set_reg_addr (this_cache, E_E4_REGNUM,
666                           sc_base + AM33_SIGCONTEXT_E4);
667  trad_frame_set_reg_addr (this_cache, E_E5_REGNUM,
668                           sc_base + AM33_SIGCONTEXT_E5);
669  trad_frame_set_reg_addr (this_cache, E_E6_REGNUM,
670                           sc_base + AM33_SIGCONTEXT_E6);
671  trad_frame_set_reg_addr (this_cache, E_E7_REGNUM,
672                           sc_base + AM33_SIGCONTEXT_E7);
673
674  trad_frame_set_reg_addr (this_cache, E_LAR_REGNUM,
675                           sc_base + AM33_SIGCONTEXT_LAR);
676  trad_frame_set_reg_addr (this_cache, E_LIR_REGNUM,
677                           sc_base + AM33_SIGCONTEXT_LIR);
678  trad_frame_set_reg_addr (this_cache, E_MDR_REGNUM,
679                           sc_base + AM33_SIGCONTEXT_MDR);
680  trad_frame_set_reg_addr (this_cache, E_MCVF_REGNUM,
681                           sc_base + AM33_SIGCONTEXT_MCVF);
682  trad_frame_set_reg_addr (this_cache, E_MCRL_REGNUM,
683                           sc_base + AM33_SIGCONTEXT_MCRL);
684  trad_frame_set_reg_addr (this_cache, E_MDRQ_REGNUM,
685                           sc_base + AM33_SIGCONTEXT_MDRQ);
686
687  trad_frame_set_reg_addr (this_cache, E_SP_REGNUM,
688                           sc_base + AM33_SIGCONTEXT_SP);
689  trad_frame_set_reg_addr (this_cache, E_PSW_REGNUM,
690                           sc_base + AM33_SIGCONTEXT_EPSW);
691  trad_frame_set_reg_addr (this_cache, E_PC_REGNUM,
692                           sc_base + AM33_SIGCONTEXT_PC);
693
694  fpubase = get_frame_memory_unsigned (this_frame,
695                                       sc_base + AM33_SIGCONTEXT_FPUCONTEXT,
696				       4);
697  if (fpubase)
698    {
699      for (i = 0; i < 32; i++)
700	{
701	  trad_frame_set_reg_addr (this_cache, E_FS0_REGNUM + i,
702	                           fpubase + 4 * i);
703	}
704      trad_frame_set_reg_addr (this_cache, E_FPCR_REGNUM, fpubase + 4 * 32);
705    }
706
707  trad_frame_set_id (this_cache, frame_id_build (sc_base, func));
708}
709
710/* AM33 GNU/Linux osabi has been recognized.
711   Now's our chance to register our corefile handling.  */
712
713static void
714am33_linux_init_osabi (struct gdbarch_info info, struct gdbarch *gdbarch)
715{
716  linux_init_abi (info, gdbarch);
717
718  set_gdbarch_iterate_over_regset_sections
719    (gdbarch, am33_iterate_over_regset_sections);
720  set_solib_svr4_fetch_link_map_offsets
721    (gdbarch, svr4_ilp32_fetch_link_map_offsets);
722
723  tramp_frame_prepend_unwinder (gdbarch, &am33_linux_sigframe);
724  tramp_frame_prepend_unwinder (gdbarch, &am33_linux_rt_sigframe);
725}
726
727/* Provide a prototype to silence -Wmissing-prototypes.  */
728extern initialize_file_ftype _initialize_mn10300_linux_tdep;
729
730void
731_initialize_mn10300_linux_tdep (void)
732{
733  gdbarch_register_osabi (bfd_arch_mn10300, 0,
734			  GDB_OSABI_LINUX, am33_linux_init_osabi);
735}
736
737