1 /* GNU/Linux on ARM native support.
2 Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
24 #include "gdb_string.h"
30 #include <sys/ptrace.h>
31 #include <sys/utsname.h>
32 #include <sys/procfs.h>
34 /* Prototypes for supply_gregset etc. */
37 extern int arm_apcs_32
;
40 #define typeSingle 0x01
41 #define typeDouble 0x02
42 #define typeExtended 0x03
44 #define ARM_CPSR_REGNUM 16
46 typedef union tagFPREG
49 unsigned int fDouble
[2];
50 unsigned int fExtended
[3];
54 typedef struct tagFPA11
56 FPREG fpreg
[8]; /* 8 floating point registers */
57 unsigned int fpsr
; /* floating point status register */
58 unsigned int fpcr
; /* floating point control register */
59 unsigned char fType
[8]; /* type of floating point value held in
60 floating point registers. */
61 int initflag
; /* NWFPE initialization flag. */
65 /* The following variables are used to determine the version of the
66 underlying GNU/Linux operating system. Examples:
68 GNU/Linux 2.0.35 GNU/Linux 2.2.12
69 os_version = 0x00020023 os_version = 0x0002020c
70 os_major = 2 os_major = 2
71 os_minor = 0 os_minor = 2
72 os_release = 35 os_release = 12
74 Note: os_version = (os_major << 16) | (os_minor << 8) | os_release
76 These are initialized using get_linux_version() from
77 _initialize_arm_linux_nat(). */
79 static unsigned int os_version
, os_major
, os_minor
, os_release
;
81 /* On GNU/Linux, threads are implemented as pseudo-processes, in which
82 case we may be tracing more than one process at a time. In that
83 case, inferior_ptid will contain the main process ID and the
84 individual thread (process) ID. get_thread_id () is used to get
85 the thread id if it's available, and the process id otherwise. */
88 get_thread_id (ptid_t ptid
)
90 int tid
= TIDGET (ptid
);
95 #define GET_THREAD_ID(PTID) get_thread_id ((PTID));
98 fetch_nwfpe_single (unsigned int fn
, FPA11
* fpa11
)
102 mem
[0] = fpa11
->fpreg
[fn
].fSingle
;
105 supply_register (ARM_F0_REGNUM
+ fn
, (char *) &mem
[0]);
109 fetch_nwfpe_double (unsigned int fn
, FPA11
* fpa11
)
113 mem
[0] = fpa11
->fpreg
[fn
].fDouble
[1];
114 mem
[1] = fpa11
->fpreg
[fn
].fDouble
[0];
116 supply_register (ARM_F0_REGNUM
+ fn
, (char *) &mem
[0]);
120 fetch_nwfpe_none (unsigned int fn
)
122 unsigned int mem
[3] =
125 supply_register (ARM_F0_REGNUM
+ fn
, (char *) &mem
[0]);
129 fetch_nwfpe_extended (unsigned int fn
, FPA11
* fpa11
)
133 mem
[0] = fpa11
->fpreg
[fn
].fExtended
[0]; /* sign & exponent */
134 mem
[1] = fpa11
->fpreg
[fn
].fExtended
[2]; /* ls bits */
135 mem
[2] = fpa11
->fpreg
[fn
].fExtended
[1]; /* ms bits */
136 supply_register (ARM_F0_REGNUM
+ fn
, (char *) &mem
[0]);
140 fetch_nwfpe_register (int regno
, FPA11
* fpa11
)
142 int fn
= regno
- ARM_F0_REGNUM
;
144 switch (fpa11
->fType
[fn
])
147 fetch_nwfpe_single (fn
, fpa11
);
151 fetch_nwfpe_double (fn
, fpa11
);
155 fetch_nwfpe_extended (fn
, fpa11
);
159 fetch_nwfpe_none (fn
);
164 store_nwfpe_single (unsigned int fn
, FPA11
*fpa11
)
168 regcache_collect (ARM_F0_REGNUM
+ fn
, (char *) &mem
[0]);
169 fpa11
->fpreg
[fn
].fSingle
= mem
[0];
170 fpa11
->fType
[fn
] = typeSingle
;
174 store_nwfpe_double (unsigned int fn
, FPA11
*fpa11
)
178 regcache_collect (ARM_F0_REGNUM
+ fn
, (char *) &mem
[0]);
179 fpa11
->fpreg
[fn
].fDouble
[1] = mem
[0];
180 fpa11
->fpreg
[fn
].fDouble
[0] = mem
[1];
181 fpa11
->fType
[fn
] = typeDouble
;
185 store_nwfpe_extended (unsigned int fn
, FPA11
*fpa11
)
189 regcache_collect (ARM_F0_REGNUM
+ fn
, (char *) &mem
[0]);
190 fpa11
->fpreg
[fn
].fExtended
[0] = mem
[0]; /* sign & exponent */
191 fpa11
->fpreg
[fn
].fExtended
[2] = mem
[1]; /* ls bits */
192 fpa11
->fpreg
[fn
].fExtended
[1] = mem
[2]; /* ms bits */
193 fpa11
->fType
[fn
] = typeDouble
;
197 store_nwfpe_register (int regno
, FPA11
* fpa11
)
199 if (register_cached (regno
))
201 unsigned int fn
= regno
- ARM_F0_REGNUM
;
202 switch (fpa11
->fType
[fn
])
205 store_nwfpe_single (fn
, fpa11
);
209 store_nwfpe_double (fn
, fpa11
);
213 store_nwfpe_extended (fn
, fpa11
);
220 /* Get the value of a particular register from the floating point
221 state of the process and store it into regcache. */
224 fetch_fpregister (int regno
)
229 /* Get the thread id for the ptrace call. */
230 tid
= GET_THREAD_ID (inferior_ptid
);
232 /* Read the floating point state. */
233 ret
= ptrace (PT_GETFPREGS
, tid
, 0, &fp
);
236 warning ("Unable to fetch floating point register.");
241 if (ARM_FPS_REGNUM
== regno
)
242 supply_register (ARM_FPS_REGNUM
, (char *) &fp
.fpsr
);
244 /* Fetch the floating point register. */
245 if (regno
>= ARM_F0_REGNUM
&& regno
<= ARM_F7_REGNUM
)
247 int fn
= regno
- ARM_F0_REGNUM
;
249 switch (fp
.fType
[fn
])
252 fetch_nwfpe_single (fn
, &fp
);
256 fetch_nwfpe_double (fn
, &fp
);
260 fetch_nwfpe_extended (fn
, &fp
);
264 fetch_nwfpe_none (fn
);
269 /* Get the whole floating point state of the process and store it
278 /* Get the thread id for the ptrace call. */
279 tid
= GET_THREAD_ID (inferior_ptid
);
281 /* Read the floating point state. */
282 ret
= ptrace (PT_GETFPREGS
, tid
, 0, &fp
);
285 warning ("Unable to fetch the floating point registers.");
290 supply_register (ARM_FPS_REGNUM
, (char *) &fp
.fpsr
);
292 /* Fetch the floating point registers. */
293 for (regno
= ARM_F0_REGNUM
; regno
<= ARM_F7_REGNUM
; regno
++)
295 int fn
= regno
- ARM_F0_REGNUM
;
297 switch (fp
.fType
[fn
])
300 fetch_nwfpe_single (fn
, &fp
);
304 fetch_nwfpe_double (fn
, &fp
);
308 fetch_nwfpe_extended (fn
, &fp
);
312 fetch_nwfpe_none (fn
);
317 /* Save a particular register into the floating point state of the
318 process using the contents from regcache. */
321 store_fpregister (int regno
)
326 /* Get the thread id for the ptrace call. */
327 tid
= GET_THREAD_ID (inferior_ptid
);
329 /* Read the floating point state. */
330 ret
= ptrace (PT_GETFPREGS
, tid
, 0, &fp
);
333 warning ("Unable to fetch the floating point registers.");
338 if (ARM_FPS_REGNUM
== regno
&& register_cached (ARM_FPS_REGNUM
))
339 regcache_collect (ARM_FPS_REGNUM
, (char *) &fp
.fpsr
);
341 /* Store the floating point register. */
342 if (regno
>= ARM_F0_REGNUM
&& regno
<= ARM_F7_REGNUM
)
344 store_nwfpe_register (regno
, &fp
);
347 ret
= ptrace (PTRACE_SETFPREGS
, tid
, 0, &fp
);
350 warning ("Unable to store floating point register.");
355 /* Save the whole floating point state of the process using
356 the contents from regcache. */
364 /* Get the thread id for the ptrace call. */
365 tid
= GET_THREAD_ID (inferior_ptid
);
367 /* Read the floating point state. */
368 ret
= ptrace (PT_GETFPREGS
, tid
, 0, &fp
);
371 warning ("Unable to fetch the floating point registers.");
376 if (register_cached (ARM_FPS_REGNUM
))
377 regcache_collect (ARM_FPS_REGNUM
, (char *) &fp
.fpsr
);
379 /* Store the floating point registers. */
380 for (regno
= ARM_F0_REGNUM
; regno
<= ARM_F7_REGNUM
; regno
++)
382 fetch_nwfpe_register (regno
, &fp
);
385 ret
= ptrace (PTRACE_SETFPREGS
, tid
, 0, &fp
);
388 warning ("Unable to store floating point registers.");
393 /* Fetch a general register of the process and store into
397 fetch_register (int regno
)
402 /* Get the thread id for the ptrace call. */
403 tid
= GET_THREAD_ID (inferior_ptid
);
405 ret
= ptrace (PTRACE_GETREGS
, tid
, 0, ®s
);
408 warning ("Unable to fetch general register.");
412 if (regno
>= ARM_A1_REGNUM
&& regno
< ARM_PC_REGNUM
)
413 supply_register (regno
, (char *) ®s
[regno
]);
415 if (ARM_PS_REGNUM
== regno
)
418 supply_register (ARM_PS_REGNUM
, (char *) ®s
[ARM_CPSR_REGNUM
]);
420 supply_register (ARM_PS_REGNUM
, (char *) ®s
[ARM_PC_REGNUM
]);
423 if (ARM_PC_REGNUM
== regno
)
425 regs
[ARM_PC_REGNUM
] = ADDR_BITS_REMOVE (regs
[ARM_PC_REGNUM
]);
426 supply_register (ARM_PC_REGNUM
, (char *) ®s
[ARM_PC_REGNUM
]);
430 /* Fetch all general registers of the process and store into
439 /* Get the thread id for the ptrace call. */
440 tid
= GET_THREAD_ID (inferior_ptid
);
442 ret
= ptrace (PTRACE_GETREGS
, tid
, 0, ®s
);
445 warning ("Unable to fetch general registers.");
449 for (regno
= ARM_A1_REGNUM
; regno
< ARM_PC_REGNUM
; regno
++)
450 supply_register (regno
, (char *) ®s
[regno
]);
453 supply_register (ARM_PS_REGNUM
, (char *) ®s
[ARM_CPSR_REGNUM
]);
455 supply_register (ARM_PS_REGNUM
, (char *) ®s
[ARM_PC_REGNUM
]);
457 regs
[ARM_PC_REGNUM
] = ADDR_BITS_REMOVE (regs
[ARM_PC_REGNUM
]);
458 supply_register (ARM_PC_REGNUM
, (char *) ®s
[ARM_PC_REGNUM
]);
461 /* Store all general registers of the process from the values in
465 store_register (int regno
)
470 if (!register_cached (regno
))
473 /* Get the thread id for the ptrace call. */
474 tid
= GET_THREAD_ID (inferior_ptid
);
476 /* Get the general registers from the process. */
477 ret
= ptrace (PTRACE_GETREGS
, tid
, 0, ®s
);
480 warning ("Unable to fetch general registers.");
484 if (regno
>= ARM_A1_REGNUM
&& regno
<= ARM_PC_REGNUM
)
485 regcache_collect (regno
, (char *) ®s
[regno
]);
487 ret
= ptrace (PTRACE_SETREGS
, tid
, 0, ®s
);
490 warning ("Unable to store general register.");
501 /* Get the thread id for the ptrace call. */
502 tid
= GET_THREAD_ID (inferior_ptid
);
504 /* Fetch the general registers. */
505 ret
= ptrace (PTRACE_GETREGS
, tid
, 0, ®s
);
508 warning ("Unable to fetch general registers.");
512 for (regno
= ARM_A1_REGNUM
; regno
<= ARM_PC_REGNUM
; regno
++)
514 if (register_cached (regno
))
515 regcache_collect (regno
, (char *) ®s
[regno
]);
518 ret
= ptrace (PTRACE_SETREGS
, tid
, 0, ®s
);
522 warning ("Unable to store general registers.");
527 /* Fetch registers from the child process. Fetch all registers if
528 regno == -1, otherwise fetch all general registers or all floating
529 point registers depending upon the value of regno. */
532 fetch_inferior_registers (int regno
)
541 if (regno
< ARM_F0_REGNUM
|| regno
> ARM_FPS_REGNUM
)
542 fetch_register (regno
);
544 if (regno
>= ARM_F0_REGNUM
&& regno
<= ARM_FPS_REGNUM
)
545 fetch_fpregister (regno
);
549 /* Store registers back into the inferior. Store all registers if
550 regno == -1, otherwise store all general registers or all floating
551 point registers depending upon the value of regno. */
554 store_inferior_registers (int regno
)
563 if ((regno
< ARM_F0_REGNUM
) || (regno
> ARM_FPS_REGNUM
))
564 store_register (regno
);
566 if ((regno
>= ARM_F0_REGNUM
) && (regno
<= ARM_FPS_REGNUM
))
567 store_fpregister (regno
);
571 /* Fill register regno (if it is a general-purpose register) in
572 *gregsetp with the appropriate value from GDB's register array.
573 If regno is -1, do this for all registers. */
576 fill_gregset (gdb_gregset_t
*gregsetp
, int regno
)
581 for (regnum
= ARM_A1_REGNUM
; regnum
<= ARM_PC_REGNUM
; regnum
++)
582 regcache_collect (regnum
, (char *) &(*gregsetp
)[regnum
]);
584 else if (regno
>= ARM_A1_REGNUM
&& regno
<= ARM_PC_REGNUM
)
585 regcache_collect (regno
, (char *) &(*gregsetp
)[regno
]);
587 if (ARM_PS_REGNUM
== regno
|| -1 == regno
)
590 regcache_collect (ARM_PS_REGNUM
,
591 (char *) &(*gregsetp
)[ARM_CPSR_REGNUM
]);
593 regcache_collect (ARM_PC_REGNUM
,
594 (char *) &(*gregsetp
)[ARM_PC_REGNUM
]);
598 /* Fill GDB's register array with the general-purpose register values
602 supply_gregset (gdb_gregset_t
*gregsetp
)
606 for (regno
= ARM_A1_REGNUM
; regno
< ARM_PC_REGNUM
; regno
++)
607 supply_register (regno
, (char *) &(*gregsetp
)[regno
]);
610 supply_register (ARM_PS_REGNUM
, (char *) &(*gregsetp
)[ARM_CPSR_REGNUM
]);
612 supply_register (ARM_PS_REGNUM
, (char *) &(*gregsetp
)[ARM_PC_REGNUM
]);
614 reg_pc
= ADDR_BITS_REMOVE ((CORE_ADDR
)(*gregsetp
)[ARM_PC_REGNUM
]);
615 supply_register (ARM_PC_REGNUM
, (char *) ®_pc
);
618 /* Fill register regno (if it is a floating-point register) in
619 *fpregsetp with the appropriate value from GDB's register array.
620 If regno is -1, do this for all registers. */
623 fill_fpregset (gdb_fpregset_t
*fpregsetp
, int regno
)
625 FPA11
*fp
= (FPA11
*) fpregsetp
;
630 for (regnum
= ARM_F0_REGNUM
; regnum
<= ARM_F7_REGNUM
; regnum
++)
631 store_nwfpe_register (regnum
, fp
);
633 else if (regno
>= ARM_F0_REGNUM
&& regno
<= ARM_F7_REGNUM
)
635 store_nwfpe_register (regno
, fp
);
640 if (ARM_FPS_REGNUM
== regno
|| -1 == regno
)
641 regcache_collect (ARM_FPS_REGNUM
, (char *) &fp
->fpsr
);
644 /* Fill GDB's register array with the floating-point register values
648 supply_fpregset (gdb_fpregset_t
*fpregsetp
)
651 FPA11
*fp
= (FPA11
*) fpregsetp
;
654 supply_register (ARM_FPS_REGNUM
, (char *) &fp
->fpsr
);
656 /* Fetch the floating point registers. */
657 for (regno
= ARM_F0_REGNUM
; regno
<= ARM_F7_REGNUM
; regno
++)
659 fetch_nwfpe_register (regno
, fp
);
664 arm_linux_kernel_u_size (void)
666 return (sizeof (struct user
));
670 get_linux_version (unsigned int *vmajor
,
671 unsigned int *vminor
,
672 unsigned int *vrelease
)
675 char *pmajor
, *pminor
, *prelease
, *tail
;
677 if (-1 == uname (&info
))
679 warning ("Unable to determine GNU/Linux version.");
683 pmajor
= strtok (info
.release
, ".");
684 pminor
= strtok (NULL
, ".");
685 prelease
= strtok (NULL
, ".");
687 *vmajor
= (unsigned int) strtoul (pmajor
, &tail
, 0);
688 *vminor
= (unsigned int) strtoul (pminor
, &tail
, 0);
689 *vrelease
= (unsigned int) strtoul (prelease
, &tail
, 0);
691 return ((*vmajor
<< 16) | (*vminor
<< 8) | *vrelease
);
695 _initialize_arm_linux_nat (void)
697 os_version
= get_linux_version (&os_major
, &os_minor
, &os_release
);
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