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 regcache_raw_supply (current_regcache
, 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 regcache_raw_supply (current_regcache
, ARM_F0_REGNUM
+ fn
, (char *) &mem
[0]);
120 fetch_nwfpe_none (unsigned int fn
)
122 unsigned int mem
[3] =
125 regcache_raw_supply (current_regcache
, 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 regcache_raw_supply (current_regcache
, 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_raw_collect (current_regcache
, ARM_F0_REGNUM
+ fn
,
170 fpa11
->fpreg
[fn
].fSingle
= mem
[0];
171 fpa11
->fType
[fn
] = typeSingle
;
175 store_nwfpe_double (unsigned int fn
, FPA11
*fpa11
)
179 regcache_raw_collect (current_regcache
, ARM_F0_REGNUM
+ fn
,
181 fpa11
->fpreg
[fn
].fDouble
[1] = mem
[0];
182 fpa11
->fpreg
[fn
].fDouble
[0] = mem
[1];
183 fpa11
->fType
[fn
] = typeDouble
;
187 store_nwfpe_extended (unsigned int fn
, FPA11
*fpa11
)
191 regcache_raw_collect (current_regcache
, ARM_F0_REGNUM
+ fn
,
193 fpa11
->fpreg
[fn
].fExtended
[0] = mem
[0]; /* sign & exponent */
194 fpa11
->fpreg
[fn
].fExtended
[2] = mem
[1]; /* ls bits */
195 fpa11
->fpreg
[fn
].fExtended
[1] = mem
[2]; /* ms bits */
196 fpa11
->fType
[fn
] = typeDouble
;
200 store_nwfpe_register (int regno
, FPA11
* fpa11
)
202 if (register_cached (regno
))
204 unsigned int fn
= regno
- ARM_F0_REGNUM
;
205 switch (fpa11
->fType
[fn
])
208 store_nwfpe_single (fn
, fpa11
);
212 store_nwfpe_double (fn
, fpa11
);
216 store_nwfpe_extended (fn
, fpa11
);
223 /* Get the value of a particular register from the floating point
224 state of the process and store it into regcache. */
227 fetch_fpregister (int regno
)
232 /* Get the thread id for the ptrace call. */
233 tid
= GET_THREAD_ID (inferior_ptid
);
235 /* Read the floating point state. */
236 ret
= ptrace (PT_GETFPREGS
, tid
, 0, &fp
);
239 warning (_("Unable to fetch floating point register."));
244 if (ARM_FPS_REGNUM
== regno
)
245 regcache_raw_supply (current_regcache
, ARM_FPS_REGNUM
, (char *) &fp
.fpsr
);
247 /* Fetch the floating point register. */
248 if (regno
>= ARM_F0_REGNUM
&& regno
<= ARM_F7_REGNUM
)
250 int fn
= regno
- ARM_F0_REGNUM
;
252 switch (fp
.fType
[fn
])
255 fetch_nwfpe_single (fn
, &fp
);
259 fetch_nwfpe_double (fn
, &fp
);
263 fetch_nwfpe_extended (fn
, &fp
);
267 fetch_nwfpe_none (fn
);
272 /* Get the whole floating point state of the process and store it
281 /* Get the thread id for the ptrace call. */
282 tid
= GET_THREAD_ID (inferior_ptid
);
284 /* Read the floating point state. */
285 ret
= ptrace (PT_GETFPREGS
, tid
, 0, &fp
);
288 warning (_("Unable to fetch the floating point registers."));
293 regcache_raw_supply (current_regcache
, ARM_FPS_REGNUM
, (char *) &fp
.fpsr
);
295 /* Fetch the floating point registers. */
296 for (regno
= ARM_F0_REGNUM
; regno
<= ARM_F7_REGNUM
; regno
++)
298 int fn
= regno
- ARM_F0_REGNUM
;
300 switch (fp
.fType
[fn
])
303 fetch_nwfpe_single (fn
, &fp
);
307 fetch_nwfpe_double (fn
, &fp
);
311 fetch_nwfpe_extended (fn
, &fp
);
315 fetch_nwfpe_none (fn
);
320 /* Save a particular register into the floating point state of the
321 process using the contents from regcache. */
324 store_fpregister (int regno
)
329 /* Get the thread id for the ptrace call. */
330 tid
= GET_THREAD_ID (inferior_ptid
);
332 /* Read the floating point state. */
333 ret
= ptrace (PT_GETFPREGS
, tid
, 0, &fp
);
336 warning (_("Unable to fetch the floating point registers."));
341 if (ARM_FPS_REGNUM
== regno
&& register_cached (ARM_FPS_REGNUM
))
342 regcache_raw_collect (current_regcache
, ARM_FPS_REGNUM
, (char *) &fp
.fpsr
);
344 /* Store the floating point register. */
345 if (regno
>= ARM_F0_REGNUM
&& regno
<= ARM_F7_REGNUM
)
347 store_nwfpe_register (regno
, &fp
);
350 ret
= ptrace (PTRACE_SETFPREGS
, tid
, 0, &fp
);
353 warning (_("Unable to store floating point register."));
358 /* Save the whole floating point state of the process using
359 the contents from regcache. */
367 /* Get the thread id for the ptrace call. */
368 tid
= GET_THREAD_ID (inferior_ptid
);
370 /* Read the floating point state. */
371 ret
= ptrace (PT_GETFPREGS
, tid
, 0, &fp
);
374 warning (_("Unable to fetch the floating point registers."));
379 if (register_cached (ARM_FPS_REGNUM
))
380 regcache_raw_collect (current_regcache
, ARM_FPS_REGNUM
, (char *) &fp
.fpsr
);
382 /* Store the floating point registers. */
383 for (regno
= ARM_F0_REGNUM
; regno
<= ARM_F7_REGNUM
; regno
++)
385 fetch_nwfpe_register (regno
, &fp
);
388 ret
= ptrace (PTRACE_SETFPREGS
, tid
, 0, &fp
);
391 warning (_("Unable to store floating point registers."));
396 /* Fetch a general register of the process and store into
400 fetch_register (int regno
)
405 /* Get the thread id for the ptrace call. */
406 tid
= GET_THREAD_ID (inferior_ptid
);
408 ret
= ptrace (PTRACE_GETREGS
, tid
, 0, ®s
);
411 warning (_("Unable to fetch general register."));
415 if (regno
>= ARM_A1_REGNUM
&& regno
< ARM_PC_REGNUM
)
416 regcache_raw_supply (current_regcache
, regno
, (char *) ®s
[regno
]);
418 if (ARM_PS_REGNUM
== regno
)
421 regcache_raw_supply (current_regcache
, ARM_PS_REGNUM
,
422 (char *) ®s
[ARM_CPSR_REGNUM
]);
424 regcache_raw_supply (current_regcache
, ARM_PS_REGNUM
,
425 (char *) ®s
[ARM_PC_REGNUM
]);
428 if (ARM_PC_REGNUM
== regno
)
430 regs
[ARM_PC_REGNUM
] = ADDR_BITS_REMOVE (regs
[ARM_PC_REGNUM
]);
431 regcache_raw_supply (current_regcache
, ARM_PC_REGNUM
,
432 (char *) ®s
[ARM_PC_REGNUM
]);
436 /* Fetch all general registers of the process and store into
445 /* Get the thread id for the ptrace call. */
446 tid
= GET_THREAD_ID (inferior_ptid
);
448 ret
= ptrace (PTRACE_GETREGS
, tid
, 0, ®s
);
451 warning (_("Unable to fetch general registers."));
455 for (regno
= ARM_A1_REGNUM
; regno
< ARM_PC_REGNUM
; regno
++)
456 regcache_raw_supply (current_regcache
, regno
, (char *) ®s
[regno
]);
459 regcache_raw_supply (current_regcache
, ARM_PS_REGNUM
,
460 (char *) ®s
[ARM_CPSR_REGNUM
]);
462 regcache_raw_supply (current_regcache
, ARM_PS_REGNUM
,
463 (char *) ®s
[ARM_PC_REGNUM
]);
465 regs
[ARM_PC_REGNUM
] = ADDR_BITS_REMOVE (regs
[ARM_PC_REGNUM
]);
466 regcache_raw_supply (current_regcache
, ARM_PC_REGNUM
,
467 (char *) ®s
[ARM_PC_REGNUM
]);
470 /* Store all general registers of the process from the values in
474 store_register (int regno
)
479 if (!register_cached (regno
))
482 /* Get the thread id for the ptrace call. */
483 tid
= GET_THREAD_ID (inferior_ptid
);
485 /* Get the general registers from the process. */
486 ret
= ptrace (PTRACE_GETREGS
, tid
, 0, ®s
);
489 warning (_("Unable to fetch general registers."));
493 if (regno
>= ARM_A1_REGNUM
&& regno
<= ARM_PC_REGNUM
)
494 regcache_raw_collect (current_regcache
, regno
, (char *) ®s
[regno
]);
495 else if (arm_apcs_32
&& regno
== ARM_PS_REGNUM
)
496 regcache_raw_collect (current_regcache
, regno
,
497 (char *) ®s
[ARM_CPSR_REGNUM
]);
498 else if (!arm_apcs_32
&& regno
== ARM_PS_REGNUM
)
499 regcache_raw_collect (current_regcache
, ARM_PC_REGNUM
,
500 (char *) ®s
[ARM_PC_REGNUM
]);
502 ret
= ptrace (PTRACE_SETREGS
, tid
, 0, ®s
);
505 warning (_("Unable to store general register."));
516 /* Get the thread id for the ptrace call. */
517 tid
= GET_THREAD_ID (inferior_ptid
);
519 /* Fetch the general registers. */
520 ret
= ptrace (PTRACE_GETREGS
, tid
, 0, ®s
);
523 warning (_("Unable to fetch general registers."));
527 for (regno
= ARM_A1_REGNUM
; regno
<= ARM_PC_REGNUM
; regno
++)
529 if (register_cached (regno
))
530 regcache_raw_collect (current_regcache
, regno
, (char *) ®s
[regno
]);
533 if (arm_apcs_32
&& register_cached (ARM_PS_REGNUM
))
534 regcache_raw_collect (current_regcache
, ARM_PS_REGNUM
,
535 (char *) ®s
[ARM_CPSR_REGNUM
]);
537 ret
= ptrace (PTRACE_SETREGS
, tid
, 0, ®s
);
541 warning (_("Unable to store general registers."));
546 /* Fetch registers from the child process. Fetch all registers if
547 regno == -1, otherwise fetch all general registers or all floating
548 point registers depending upon the value of regno. */
551 fetch_inferior_registers (int regno
)
560 if (regno
< ARM_F0_REGNUM
|| regno
> ARM_FPS_REGNUM
)
561 fetch_register (regno
);
563 if (regno
>= ARM_F0_REGNUM
&& regno
<= ARM_FPS_REGNUM
)
564 fetch_fpregister (regno
);
568 /* Store registers back into the inferior. Store all registers if
569 regno == -1, otherwise store all general registers or all floating
570 point registers depending upon the value of regno. */
573 store_inferior_registers (int regno
)
582 if ((regno
< ARM_F0_REGNUM
) || (regno
> ARM_FPS_REGNUM
))
583 store_register (regno
);
585 if ((regno
>= ARM_F0_REGNUM
) && (regno
<= ARM_FPS_REGNUM
))
586 store_fpregister (regno
);
590 /* Fill register regno (if it is a general-purpose register) in
591 *gregsetp with the appropriate value from GDB's register array.
592 If regno is -1, do this for all registers. */
595 fill_gregset (gdb_gregset_t
*gregsetp
, int regno
)
600 for (regnum
= ARM_A1_REGNUM
; regnum
<= ARM_PC_REGNUM
; regnum
++)
601 regcache_raw_collect (current_regcache
, regnum
,
602 (char *) &(*gregsetp
)[regnum
]);
604 else if (regno
>= ARM_A1_REGNUM
&& regno
<= ARM_PC_REGNUM
)
605 regcache_raw_collect (current_regcache
, regno
,
606 (char *) &(*gregsetp
)[regno
]);
608 if (ARM_PS_REGNUM
== regno
|| -1 == regno
)
611 regcache_raw_collect (current_regcache
, ARM_PS_REGNUM
,
612 (char *) &(*gregsetp
)[ARM_CPSR_REGNUM
]);
614 regcache_raw_collect (current_regcache
, ARM_PC_REGNUM
,
615 (char *) &(*gregsetp
)[ARM_PC_REGNUM
]);
619 /* Fill GDB's register array with the general-purpose register values
623 supply_gregset (gdb_gregset_t
*gregsetp
)
627 for (regno
= ARM_A1_REGNUM
; regno
< ARM_PC_REGNUM
; regno
++)
628 regcache_raw_supply (current_regcache
, regno
,
629 (char *) &(*gregsetp
)[regno
]);
632 regcache_raw_supply (current_regcache
, ARM_PS_REGNUM
,
633 (char *) &(*gregsetp
)[ARM_CPSR_REGNUM
]);
635 regcache_raw_supply (current_regcache
, ARM_PS_REGNUM
,
636 (char *) &(*gregsetp
)[ARM_PC_REGNUM
]);
638 reg_pc
= ADDR_BITS_REMOVE ((CORE_ADDR
)(*gregsetp
)[ARM_PC_REGNUM
]);
639 regcache_raw_supply (current_regcache
, ARM_PC_REGNUM
, (char *) ®_pc
);
642 /* Fill register regno (if it is a floating-point register) in
643 *fpregsetp with the appropriate value from GDB's register array.
644 If regno is -1, do this for all registers. */
647 fill_fpregset (gdb_fpregset_t
*fpregsetp
, int regno
)
649 FPA11
*fp
= (FPA11
*) fpregsetp
;
654 for (regnum
= ARM_F0_REGNUM
; regnum
<= ARM_F7_REGNUM
; regnum
++)
655 store_nwfpe_register (regnum
, fp
);
657 else if (regno
>= ARM_F0_REGNUM
&& regno
<= ARM_F7_REGNUM
)
659 store_nwfpe_register (regno
, fp
);
664 if (ARM_FPS_REGNUM
== regno
|| -1 == regno
)
665 regcache_raw_collect (current_regcache
, ARM_FPS_REGNUM
,
669 /* Fill GDB's register array with the floating-point register values
673 supply_fpregset (gdb_fpregset_t
*fpregsetp
)
676 FPA11
*fp
= (FPA11
*) fpregsetp
;
679 regcache_raw_supply (current_regcache
, ARM_FPS_REGNUM
, (char *) &fp
->fpsr
);
681 /* Fetch the floating point registers. */
682 for (regno
= ARM_F0_REGNUM
; regno
<= ARM_F7_REGNUM
; regno
++)
684 fetch_nwfpe_register (regno
, fp
);
689 arm_linux_kernel_u_size (void)
691 return (sizeof (struct user
));
695 get_linux_version (unsigned int *vmajor
,
696 unsigned int *vminor
,
697 unsigned int *vrelease
)
700 char *pmajor
, *pminor
, *prelease
, *tail
;
702 if (-1 == uname (&info
))
704 warning (_("Unable to determine GNU/Linux version."));
708 pmajor
= strtok (info
.release
, ".");
709 pminor
= strtok (NULL
, ".");
710 prelease
= strtok (NULL
, ".");
712 *vmajor
= (unsigned int) strtoul (pmajor
, &tail
, 0);
713 *vminor
= (unsigned int) strtoul (pminor
, &tail
, 0);
714 *vrelease
= (unsigned int) strtoul (prelease
, &tail
, 0);
716 return ((*vmajor
<< 16) | (*vminor
<< 8) | *vrelease
);
720 _initialize_arm_linux_nat (void)
722 os_version
= get_linux_version (&os_major
, &os_minor
, &os_release
);
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