* gdb/fileio.h: New file.
[deliverable/binutils-gdb.git] / gdb / mipsm3-nat.c
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1// OBSOLETE /* Definitions to make GDB run on a mips box under Mach 3.0
2// OBSOLETE Copyright 1992, 1993, 1998, 2000, 2001 Free Software Foundation, Inc.
3// OBSOLETE
4// OBSOLETE This file is part of GDB.
5// OBSOLETE
6// OBSOLETE This program is free software; you can redistribute it and/or modify
7// OBSOLETE it under the terms of the GNU General Public License as published by
8// OBSOLETE the Free Software Foundation; either version 2 of the License, or
9// OBSOLETE (at your option) any later version.
10// OBSOLETE
11// OBSOLETE This program is distributed in the hope that it will be useful,
12// OBSOLETE but WITHOUT ANY WARRANTY; without even the implied warranty of
13// OBSOLETE MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14// OBSOLETE GNU General Public License for more details.
15// OBSOLETE
16// OBSOLETE You should have received a copy of the GNU General Public License
17// OBSOLETE along with this program; if not, write to the Free Software
18// OBSOLETE Foundation, Inc., 59 Temple Place - Suite 330,
19// OBSOLETE Boston, MA 02111-1307, USA. */
20// OBSOLETE
21// OBSOLETE /* Mach specific routines for little endian mips (e.g. pmax)
22// OBSOLETE * running Mach 3.0
23// OBSOLETE *
24// OBSOLETE * Author: Jukka Virtanen <jtv@hut.fi>
25// OBSOLETE */
26// OBSOLETE
27// OBSOLETE #include "defs.h"
28// OBSOLETE #include "inferior.h"
29// OBSOLETE #include "regcache.h"
30// OBSOLETE
31// OBSOLETE #include <stdio.h>
32// OBSOLETE
33// OBSOLETE #include <mach.h>
34// OBSOLETE #include <mach/message.h>
35// OBSOLETE #include <mach/exception.h>
36// OBSOLETE #include <mach_error.h>
37// OBSOLETE
38// OBSOLETE /* Find offsets to thread states at compile time.
39// OBSOLETE * If your compiler does not grok this, check the hand coded
40// OBSOLETE * offsets and use them.
41// OBSOLETE */
42// OBSOLETE
43// OBSOLETE #if 1
44// OBSOLETE
45// OBSOLETE #define REG_OFFSET(reg) (int)(&((struct mips_thread_state *)0)->reg)
46// OBSOLETE #define CREG_OFFSET(reg) (int)(&((struct mips_float_state *)0)->reg)
47// OBSOLETE #define EREG_OFFSET(reg) (int)(&((struct mips_exc_state *)0)->reg)
48// OBSOLETE
49// OBSOLETE /* at reg_offset[i] is the offset to the mips_thread_state
50// OBSOLETE * location where the gdb registers[i] is stored.
51// OBSOLETE *
52// OBSOLETE * -1 means mach does not save it anywhere.
53// OBSOLETE */
54// OBSOLETE static int reg_offset[] =
55// OBSOLETE {
56// OBSOLETE /* zero at v0 v1 */
57// OBSOLETE -1, REG_OFFSET (r1), REG_OFFSET (r2), REG_OFFSET (r3),
58// OBSOLETE
59// OBSOLETE /* a0 a1 a2 a3 */
60// OBSOLETE REG_OFFSET (r4), REG_OFFSET (r5), REG_OFFSET (r6), REG_OFFSET (r7),
61// OBSOLETE
62// OBSOLETE /* t0 t1 t2 t3 */
63// OBSOLETE REG_OFFSET (r8), REG_OFFSET (r9), REG_OFFSET (r10), REG_OFFSET (r11),
64// OBSOLETE
65// OBSOLETE /* t4 t5 t6 t7 */
66// OBSOLETE REG_OFFSET (r12), REG_OFFSET (r13), REG_OFFSET (r14), REG_OFFSET (r15),
67// OBSOLETE
68// OBSOLETE /* s0 s1 s2 s3 */
69// OBSOLETE REG_OFFSET (r16), REG_OFFSET (r17), REG_OFFSET (r18), REG_OFFSET (r19),
70// OBSOLETE
71// OBSOLETE /* s4 s5 s6 s7 */
72// OBSOLETE REG_OFFSET (r20), REG_OFFSET (r21), REG_OFFSET (r22), REG_OFFSET (r23),
73// OBSOLETE
74// OBSOLETE /* t8 t9 k0 k1 */
75// OBSOLETE REG_OFFSET (r24), REG_OFFSET (r25), REG_OFFSET (r26), REG_OFFSET (r27),
76// OBSOLETE
77// OBSOLETE /* gp sp s8(30) == fp(72) ra */
78// OBSOLETE REG_OFFSET (r28), REG_OFFSET (r29), REG_OFFSET (r30), REG_OFFSET (r31),
79// OBSOLETE
80// OBSOLETE /* sr(32) PS_REGNUM */
81// OBSOLETE EREG_OFFSET (coproc_state),
82// OBSOLETE
83// OBSOLETE /* lo(33) hi(34) */
84// OBSOLETE REG_OFFSET (mdlo), REG_OFFSET (mdhi),
85// OBSOLETE
86// OBSOLETE /* bad(35) cause(36) pc(37) */
87// OBSOLETE EREG_OFFSET (address), EREG_OFFSET (cause), REG_OFFSET (pc),
88// OBSOLETE
89// OBSOLETE /* f0(38) f1(39) f2(40) f3(41) */
90// OBSOLETE CREG_OFFSET (r0), CREG_OFFSET (r1), CREG_OFFSET (r2), CREG_OFFSET (r3),
91// OBSOLETE CREG_OFFSET (r4), CREG_OFFSET (r5), CREG_OFFSET (r6), CREG_OFFSET (r7),
92// OBSOLETE CREG_OFFSET (r8), CREG_OFFSET (r9), CREG_OFFSET (r10), CREG_OFFSET (r11),
93// OBSOLETE CREG_OFFSET (r12), CREG_OFFSET (r13), CREG_OFFSET (r14), CREG_OFFSET (r15),
94// OBSOLETE CREG_OFFSET (r16), CREG_OFFSET (r17), CREG_OFFSET (r18), CREG_OFFSET (r19),
95// OBSOLETE CREG_OFFSET (r20), CREG_OFFSET (r21), CREG_OFFSET (r22), CREG_OFFSET (r23),
96// OBSOLETE CREG_OFFSET (r24), CREG_OFFSET (r25), CREG_OFFSET (r26), CREG_OFFSET (r27),
97// OBSOLETE CREG_OFFSET (r28), CREG_OFFSET (r29), CREG_OFFSET (r30), CREG_OFFSET (r31),
98// OBSOLETE
99// OBSOLETE /* fsr(70) fir(71) fp(72) == s8(30) */
100// OBSOLETE CREG_OFFSET (csr), CREG_OFFSET (esr), REG_OFFSET (r30)
101// OBSOLETE };
102// OBSOLETE #else
103// OBSOLETE /* If the compiler does not grok the above defines */
104// OBSOLETE static int reg_offset[] =
105// OBSOLETE {
106// OBSOLETE /* mach_thread_state offsets: */
107// OBSOLETE -1, 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56,
108// OBSOLETE 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 108, 112, 116, 120,
109// OBSOLETE /*sr, lo, hi,addr,cause,pc */
110// OBSOLETE 8, 124, 128, 4, 0, 132,
111// OBSOLETE /* mach_float_state offsets: */
112// OBSOLETE 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60,
113// OBSOLETE 64, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 108, 112, 116, 120, 124,
114// OBSOLETE /*fsr,fir */
115// OBSOLETE 128, 132,
116// OBSOLETE /* FP_REGNUM pseudo maps to s8==r30 in mach_thread_state */
117// OBSOLETE 116
118// OBSOLETE };
119// OBSOLETE #endif
120// OBSOLETE
121// OBSOLETE /* Fetch COUNT contiguous registers from thread STATE starting from REGNUM
122// OBSOLETE * Caller knows that the regs handled in one transaction are of same size.
123// OBSOLETE */
124// OBSOLETE #define FETCH_REGS(state, regnum, count) \
125// OBSOLETE memcpy (&deprecated_registers[REGISTER_BYTE (regnum)], \
126// OBSOLETE (char *)state+reg_offset[ regnum ], \
127// OBSOLETE count*REGISTER_SIZE)
128// OBSOLETE
129// OBSOLETE /* Store COUNT contiguous registers to thread STATE starting from REGNUM */
130// OBSOLETE #define STORE_REGS(state, regnum, count) \
131// OBSOLETE memcpy ((char *)state+reg_offset[ regnum ], \
132// OBSOLETE &deprecated_registers[REGISTER_BYTE (regnum)], \
133// OBSOLETE count*REGISTER_SIZE)
134// OBSOLETE
135// OBSOLETE #define REGS_ALL -1
136// OBSOLETE #define REGS_NORMAL 1
137// OBSOLETE #define REGS_EXC 2
138// OBSOLETE #define REGS_COP1 4
139// OBSOLETE
140// OBSOLETE /* Hardware regs that matches FP_REGNUM */
141// OBSOLETE #define MACH_FP_REGNUM 30
142// OBSOLETE
143// OBSOLETE /* Fech thread's registers. if regno == -1, fetch all regs */
144// OBSOLETE void
145// OBSOLETE fetch_inferior_registers (int regno)
146// OBSOLETE {
147// OBSOLETE kern_return_t ret;
148// OBSOLETE
149// OBSOLETE thread_state_data_t state;
150// OBSOLETE struct mips_exc_state exc_state;
151// OBSOLETE
152// OBSOLETE int stateCnt = MIPS_THREAD_STATE_COUNT;
153// OBSOLETE
154// OBSOLETE int which_regs = 0; /* A bit mask */
155// OBSOLETE
156// OBSOLETE if (!MACH_PORT_VALID (current_thread))
157// OBSOLETE error ("fetch inferior registers: Invalid thread");
158// OBSOLETE
159// OBSOLETE if (regno < -1 || regno >= NUM_REGS)
160// OBSOLETE error ("invalid register %d supplied to fetch_inferior_registers", regno);
161// OBSOLETE
162// OBSOLETE if (regno == -1)
163// OBSOLETE which_regs = REGS_ALL;
164// OBSOLETE else if (regno == ZERO_REGNUM)
165// OBSOLETE {
166// OBSOLETE int zero = 0;
167// OBSOLETE supply_register (ZERO_REGNUM, &zero);
168// OBSOLETE return;
169// OBSOLETE }
170// OBSOLETE else if ((ZERO_REGNUM < regno && regno < PS_REGNUM)
171// OBSOLETE || regno == FP_REGNUM
172// OBSOLETE || regno == LO_REGNUM
173// OBSOLETE || regno == HI_REGNUM
174// OBSOLETE || regno == PC_REGNUM)
175// OBSOLETE which_regs = REGS_NORMAL;
176// OBSOLETE else if (FP0_REGNUM <= regno && regno <= FCRIR_REGNUM)
177// OBSOLETE which_regs = REGS_COP1 | REGS_EXC;
178// OBSOLETE else
179// OBSOLETE which_regs = REGS_EXC;
180// OBSOLETE
181// OBSOLETE /* fetch regs saved to mips_thread_state */
182// OBSOLETE if (which_regs & REGS_NORMAL)
183// OBSOLETE {
184// OBSOLETE ret = thread_get_state (current_thread,
185// OBSOLETE MIPS_THREAD_STATE,
186// OBSOLETE state,
187// OBSOLETE &stateCnt);
188// OBSOLETE CHK ("fetch inferior registers: thread_get_state", ret);
189// OBSOLETE
190// OBSOLETE if (which_regs == REGS_NORMAL)
191// OBSOLETE {
192// OBSOLETE /* Fetch also FP_REGNUM if fetching MACH_FP_REGNUM and vice versa */
193// OBSOLETE if (regno == MACH_FP_REGNUM || regno == FP_REGNUM)
194// OBSOLETE {
195// OBSOLETE supply_register (FP_REGNUM,
196// OBSOLETE (char *) state + reg_offset[MACH_FP_REGNUM]);
197// OBSOLETE supply_register (MACH_FP_REGNUM,
198// OBSOLETE (char *) state + reg_offset[MACH_FP_REGNUM]);
199// OBSOLETE }
200// OBSOLETE else
201// OBSOLETE supply_register (regno,
202// OBSOLETE (char *) state + reg_offset[regno]);
203// OBSOLETE return;
204// OBSOLETE }
205// OBSOLETE
206// OBSOLETE /* ZERO_REGNUM is always zero */
207// OBSOLETE *(int *) deprecated_registers = 0;
208// OBSOLETE
209// OBSOLETE /* Copy thread saved regs 1..31 to gdb's reg value array
210// OBSOLETE * Luckily, they are contiquous
211// OBSOLETE */
212// OBSOLETE FETCH_REGS (state, 1, 31);
213// OBSOLETE
214// OBSOLETE /* Copy mdlo and mdhi */
215// OBSOLETE FETCH_REGS (state, LO_REGNUM, 2);
216// OBSOLETE
217// OBSOLETE /* Copy PC */
218// OBSOLETE FETCH_REGS (state, PC_REGNUM, 1);
219// OBSOLETE
220// OBSOLETE /* Mach 3.0 saves FP to MACH_FP_REGNUM.
221// OBSOLETE * For some reason gdb wants to assign a pseudo register for it.
222// OBSOLETE */
223// OBSOLETE FETCH_REGS (state, FP_REGNUM, 1);
224// OBSOLETE }
225// OBSOLETE
226// OBSOLETE /* Read exc state. Also read if need to fetch floats */
227// OBSOLETE if (which_regs & REGS_EXC)
228// OBSOLETE {
229// OBSOLETE stateCnt = MIPS_EXC_STATE_COUNT;
230// OBSOLETE ret = thread_get_state (current_thread,
231// OBSOLETE MIPS_EXC_STATE,
232// OBSOLETE (thread_state_t) & exc_state,
233// OBSOLETE &stateCnt);
234// OBSOLETE CHK ("fetch inferior regs (exc): thread_get_state", ret);
235// OBSOLETE
236// OBSOLETE /* We need to fetch exc_state to see if the floating
237// OBSOLETE * state is valid for the thread.
238// OBSOLETE */
239// OBSOLETE
240// OBSOLETE /* cproc_state: Which coprocessors the thread uses */
241// OBSOLETE supply_register (PS_REGNUM,
242// OBSOLETE (char *) &exc_state + reg_offset[PS_REGNUM]);
243// OBSOLETE
244// OBSOLETE if (which_regs == REGS_EXC || which_regs == REGS_ALL)
245// OBSOLETE {
246// OBSOLETE supply_register (BADVADDR_REGNUM,
247// OBSOLETE (char *) &exc_state + reg_offset[BADVADDR_REGNUM]);
248// OBSOLETE
249// OBSOLETE supply_register (CAUSE_REGNUM,
250// OBSOLETE (char *) &exc_state + reg_offset[CAUSE_REGNUM]);
251// OBSOLETE if (which_regs == REGS_EXC)
252// OBSOLETE return;
253// OBSOLETE }
254// OBSOLETE }
255// OBSOLETE
256// OBSOLETE
257// OBSOLETE if (which_regs & REGS_COP1)
258// OBSOLETE {
259// OBSOLETE /* If the thread does not have saved COPROC1, set regs to zero */
260// OBSOLETE
261// OBSOLETE if (!(exc_state.coproc_state & MIPS_STATUS_USE_COP1))
262// OBSOLETE bzero (&deprecated_registers[REGISTER_BYTE (FP0_REGNUM)],
263// OBSOLETE sizeof (struct mips_float_state));
264// OBSOLETE else
265// OBSOLETE {
266// OBSOLETE stateCnt = MIPS_FLOAT_STATE_COUNT;
267// OBSOLETE ret = thread_get_state (current_thread,
268// OBSOLETE MIPS_FLOAT_STATE,
269// OBSOLETE state,
270// OBSOLETE &stateCnt);
271// OBSOLETE CHK ("fetch inferior regs (floats): thread_get_state", ret);
272// OBSOLETE
273// OBSOLETE if (regno != -1)
274// OBSOLETE {
275// OBSOLETE supply_register (regno,
276// OBSOLETE (char *) state + reg_offset[regno]);
277// OBSOLETE return;
278// OBSOLETE }
279// OBSOLETE
280// OBSOLETE FETCH_REGS (state, FP0_REGNUM, 34);
281// OBSOLETE }
282// OBSOLETE }
283// OBSOLETE
284// OBSOLETE /* All registers are valid, if not returned yet */
285// OBSOLETE deprecated_registers_fetched ();
286// OBSOLETE }
287// OBSOLETE
288// OBSOLETE /* Store gdb's view of registers to the thread.
289// OBSOLETE * All registers are always valid when entering here.
290// OBSOLETE * @@ ahem, maybe that is too strict, we could validate the necessary ones
291// OBSOLETE * here.
292// OBSOLETE *
293// OBSOLETE * Hmm. It seems that gdb set $reg=value command first reads everything,
294// OBSOLETE * then sets the reg and then stores everything. -> we must make sure
295// OBSOLETE * that the immutable registers are not changed by reading them first.
296// OBSOLETE */
297// OBSOLETE
298// OBSOLETE void
299// OBSOLETE store_inferior_registers (register int regno)
300// OBSOLETE {
301// OBSOLETE thread_state_data_t state;
302// OBSOLETE kern_return_t ret;
303// OBSOLETE
304// OBSOLETE if (!MACH_PORT_VALID (current_thread))
305// OBSOLETE error ("store inferior registers: Invalid thread");
306// OBSOLETE
307// OBSOLETE /* Check for read only regs.
308// OBSOLETE * @@ If some of these is can be changed, fix this
309// OBSOLETE */
310// OBSOLETE if (regno == ZERO_REGNUM ||
311// OBSOLETE regno == PS_REGNUM ||
312// OBSOLETE regno == BADVADDR_REGNUM ||
313// OBSOLETE regno == CAUSE_REGNUM ||
314// OBSOLETE regno == FCRIR_REGNUM)
315// OBSOLETE {
316// OBSOLETE message ("You can not alter read-only register `%s'",
317// OBSOLETE REGISTER_NAME (regno));
318// OBSOLETE fetch_inferior_registers (regno);
319// OBSOLETE return;
320// OBSOLETE }
321// OBSOLETE
322// OBSOLETE if (regno == -1)
323// OBSOLETE {
324// OBSOLETE /* Don't allow these to change */
325// OBSOLETE
326// OBSOLETE /* ZERO_REGNUM */
327// OBSOLETE *(int *) deprecated_registers = 0;
328// OBSOLETE
329// OBSOLETE fetch_inferior_registers (PS_REGNUM);
330// OBSOLETE fetch_inferior_registers (BADVADDR_REGNUM);
331// OBSOLETE fetch_inferior_registers (CAUSE_REGNUM);
332// OBSOLETE fetch_inferior_registers (FCRIR_REGNUM);
333// OBSOLETE }
334// OBSOLETE
335// OBSOLETE if (regno == -1 || (ZERO_REGNUM < regno && regno <= PC_REGNUM))
336// OBSOLETE {
337// OBSOLETE #if 1
338// OBSOLETE /* Mach 3.0 saves thread's FP to MACH_FP_REGNUM.
339// OBSOLETE * GDB wants assigns a pseudo register FP_REGNUM for frame pointer.
340// OBSOLETE *
341// OBSOLETE * @@@ Here I assume (!) that gdb's FP has the value that
342// OBSOLETE * should go to threads frame pointer. If not true, this
343// OBSOLETE * fails badly!!!!!
344// OBSOLETE */
345// OBSOLETE memcpy (&deprecated_registers[REGISTER_BYTE (MACH_FP_REGNUM)],
346// OBSOLETE &deprecated_registers[REGISTER_BYTE (FP_REGNUM)],
347// OBSOLETE REGISTER_RAW_SIZE (FP_REGNUM));
348// OBSOLETE #endif
349// OBSOLETE
350// OBSOLETE /* Save gdb's regs 1..31 to thread saved regs 1..31
351// OBSOLETE * Luckily, they are contiquous
352// OBSOLETE */
353// OBSOLETE STORE_REGS (state, 1, 31);
354// OBSOLETE
355// OBSOLETE /* Save mdlo, mdhi */
356// OBSOLETE STORE_REGS (state, LO_REGNUM, 2);
357// OBSOLETE
358// OBSOLETE /* Save PC */
359// OBSOLETE STORE_REGS (state, PC_REGNUM, 1);
360// OBSOLETE
361// OBSOLETE ret = thread_set_state (current_thread,
362// OBSOLETE MIPS_THREAD_STATE,
363// OBSOLETE state,
364// OBSOLETE MIPS_FLOAT_STATE_COUNT);
365// OBSOLETE CHK ("store inferior regs : thread_set_state", ret);
366// OBSOLETE }
367// OBSOLETE
368// OBSOLETE if (regno == -1 || regno >= FP0_REGNUM)
369// OBSOLETE {
370// OBSOLETE /* If thread has floating state, save it */
371// OBSOLETE if (read_register (PS_REGNUM) & MIPS_STATUS_USE_COP1)
372// OBSOLETE {
373// OBSOLETE /* Do NOT save FCRIR_REGNUM */
374// OBSOLETE STORE_REGS (state, FP0_REGNUM, 33);
375// OBSOLETE
376// OBSOLETE ret = thread_set_state (current_thread,
377// OBSOLETE MIPS_FLOAT_STATE,
378// OBSOLETE state,
379// OBSOLETE MIPS_FLOAT_STATE_COUNT);
380// OBSOLETE CHK ("store inferior registers (floats): thread_set_state", ret);
381// OBSOLETE }
382// OBSOLETE else if (regno != -1)
383// OBSOLETE message
384// OBSOLETE ("Thread does not use floating point unit, floating regs not saved");
385// OBSOLETE }
386// OBSOLETE }
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