1 /* GNU/Linux on ARM native support.
2 Copyright 1999, 2000, 2001, 2002, 2004, 2005
3 Free Software Foundation, Inc.
5 This file is part of GDB.
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 2 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
25 #include "gdb_string.h"
28 #include "linux-nat.h"
33 #include <sys/ptrace.h>
34 #include <sys/utsname.h>
35 #include <sys/procfs.h>
37 /* Prototypes for supply_gregset etc. */
40 extern int arm_apcs_32;
43 #define typeSingle 0x01
44 #define typeDouble 0x02
45 #define typeExtended 0x03
47 #define ARM_CPSR_REGNUM 16
49 typedef union tagFPREG
52 unsigned int fDouble[2];
53 unsigned int fExtended[3];
57 typedef struct tagFPA11
59 FPREG fpreg[8]; /* 8 floating point registers */
60 unsigned int fpsr; /* floating point status register */
61 unsigned int fpcr; /* floating point control register */
62 unsigned char fType[8]; /* type of floating point value held in
63 floating point registers. */
64 int initflag; /* NWFPE initialization flag. */
68 /* The following variables are used to determine the version of the
69 underlying GNU/Linux operating system. Examples:
71 GNU/Linux 2.0.35 GNU/Linux 2.2.12
72 os_version = 0x00020023 os_version = 0x0002020c
73 os_major = 2 os_major = 2
74 os_minor = 0 os_minor = 2
75 os_release = 35 os_release = 12
77 Note: os_version = (os_major << 16) | (os_minor << 8) | os_release
79 These are initialized using get_linux_version() from
80 _initialize_arm_linux_nat(). */
82 static unsigned int os_version, os_major, os_minor, os_release;
84 /* On GNU/Linux, threads are implemented as pseudo-processes, in which
85 case we may be tracing more than one process at a time. In that
86 case, inferior_ptid will contain the main process ID and the
87 individual thread (process) ID. get_thread_id () is used to get
88 the thread id if it's available, and the process id otherwise. */
91 get_thread_id (ptid_t ptid)
93 int tid = TIDGET (ptid);
98 #define GET_THREAD_ID(PTID) get_thread_id ((PTID));
101 fetch_nwfpe_single (unsigned int fn, FPA11 * fpa11)
105 mem[0] = fpa11->fpreg[fn].fSingle;
108 regcache_raw_supply (current_regcache, ARM_F0_REGNUM + fn, (char *) &mem[0]);
112 fetch_nwfpe_double (unsigned int fn, FPA11 * fpa11)
116 mem[0] = fpa11->fpreg[fn].fDouble[1];
117 mem[1] = fpa11->fpreg[fn].fDouble[0];
119 regcache_raw_supply (current_regcache, ARM_F0_REGNUM + fn, (char *) &mem[0]);
123 fetch_nwfpe_none (unsigned int fn)
125 unsigned int mem[3] =
128 regcache_raw_supply (current_regcache, ARM_F0_REGNUM + fn, (char *) &mem[0]);
132 fetch_nwfpe_extended (unsigned int fn, FPA11 * fpa11)
136 mem[0] = fpa11->fpreg[fn].fExtended[0]; /* sign & exponent */
137 mem[1] = fpa11->fpreg[fn].fExtended[2]; /* ls bits */
138 mem[2] = fpa11->fpreg[fn].fExtended[1]; /* ms bits */
139 regcache_raw_supply (current_regcache, ARM_F0_REGNUM + fn, (char *) &mem[0]);
143 fetch_nwfpe_register (int regno, FPA11 * fpa11)
145 int fn = regno - ARM_F0_REGNUM;
147 switch (fpa11->fType[fn])
150 fetch_nwfpe_single (fn, fpa11);
154 fetch_nwfpe_double (fn, fpa11);
158 fetch_nwfpe_extended (fn, fpa11);
162 fetch_nwfpe_none (fn);
167 store_nwfpe_single (unsigned int fn, FPA11 *fpa11)
171 regcache_raw_collect (current_regcache, ARM_F0_REGNUM + fn,
173 fpa11->fpreg[fn].fSingle = mem[0];
174 fpa11->fType[fn] = typeSingle;
178 store_nwfpe_double (unsigned int fn, FPA11 *fpa11)
182 regcache_raw_collect (current_regcache, ARM_F0_REGNUM + fn,
184 fpa11->fpreg[fn].fDouble[1] = mem[0];
185 fpa11->fpreg[fn].fDouble[0] = mem[1];
186 fpa11->fType[fn] = typeDouble;
190 store_nwfpe_extended (unsigned int fn, FPA11 *fpa11)
194 regcache_raw_collect (current_regcache, ARM_F0_REGNUM + fn,
196 fpa11->fpreg[fn].fExtended[0] = mem[0]; /* sign & exponent */
197 fpa11->fpreg[fn].fExtended[2] = mem[1]; /* ls bits */
198 fpa11->fpreg[fn].fExtended[1] = mem[2]; /* ms bits */
199 fpa11->fType[fn] = typeDouble;
203 store_nwfpe_register (int regno, FPA11 * fpa11)
205 if (register_cached (regno))
207 unsigned int fn = regno - ARM_F0_REGNUM;
208 switch (fpa11->fType[fn])
211 store_nwfpe_single (fn, fpa11);
215 store_nwfpe_double (fn, fpa11);
219 store_nwfpe_extended (fn, fpa11);
226 /* Get the value of a particular register from the floating point
227 state of the process and store it into regcache. */
230 fetch_fpregister (int regno)
235 /* Get the thread id for the ptrace call. */
236 tid = GET_THREAD_ID (inferior_ptid);
238 /* Read the floating point state. */
239 ret = ptrace (PT_GETFPREGS, tid, 0, &fp);
242 warning (_("Unable to fetch floating point register."));
247 if (ARM_FPS_REGNUM == regno)
248 regcache_raw_supply (current_regcache, ARM_FPS_REGNUM, (char *) &fp.fpsr);
250 /* Fetch the floating point register. */
251 if (regno >= ARM_F0_REGNUM && regno <= ARM_F7_REGNUM)
253 int fn = regno - ARM_F0_REGNUM;
255 switch (fp.fType[fn])
258 fetch_nwfpe_single (fn, &fp);
262 fetch_nwfpe_double (fn, &fp);
266 fetch_nwfpe_extended (fn, &fp);
270 fetch_nwfpe_none (fn);
275 /* Get the whole floating point state of the process and store it
284 /* Get the thread id for the ptrace call. */
285 tid = GET_THREAD_ID (inferior_ptid);
287 /* Read the floating point state. */
288 ret = ptrace (PT_GETFPREGS, tid, 0, &fp);
291 warning (_("Unable to fetch the floating point registers."));
296 regcache_raw_supply (current_regcache, ARM_FPS_REGNUM, (char *) &fp.fpsr);
298 /* Fetch the floating point registers. */
299 for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++)
301 int fn = regno - ARM_F0_REGNUM;
303 switch (fp.fType[fn])
306 fetch_nwfpe_single (fn, &fp);
310 fetch_nwfpe_double (fn, &fp);
314 fetch_nwfpe_extended (fn, &fp);
318 fetch_nwfpe_none (fn);
323 /* Save a particular register into the floating point state of the
324 process using the contents from regcache. */
327 store_fpregister (int regno)
332 /* Get the thread id for the ptrace call. */
333 tid = GET_THREAD_ID (inferior_ptid);
335 /* Read the floating point state. */
336 ret = ptrace (PT_GETFPREGS, tid, 0, &fp);
339 warning (_("Unable to fetch the floating point registers."));
344 if (ARM_FPS_REGNUM == regno && register_cached (ARM_FPS_REGNUM))
345 regcache_raw_collect (current_regcache, ARM_FPS_REGNUM, (char *) &fp.fpsr);
347 /* Store the floating point register. */
348 if (regno >= ARM_F0_REGNUM && regno <= ARM_F7_REGNUM)
350 store_nwfpe_register (regno, &fp);
353 ret = ptrace (PTRACE_SETFPREGS, tid, 0, &fp);
356 warning (_("Unable to store floating point register."));
361 /* Save the whole floating point state of the process using
362 the contents from regcache. */
370 /* Get the thread id for the ptrace call. */
371 tid = GET_THREAD_ID (inferior_ptid);
373 /* Read the floating point state. */
374 ret = ptrace (PT_GETFPREGS, tid, 0, &fp);
377 warning (_("Unable to fetch the floating point registers."));
382 if (register_cached (ARM_FPS_REGNUM))
383 regcache_raw_collect (current_regcache, ARM_FPS_REGNUM, (char *) &fp.fpsr);
385 /* Store the floating point registers. */
386 for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++)
388 fetch_nwfpe_register (regno, &fp);
391 ret = ptrace (PTRACE_SETFPREGS, tid, 0, &fp);
394 warning (_("Unable to store floating point registers."));
399 /* Fetch a general register of the process and store into
403 fetch_register (int regno)
408 /* Get the thread id for the ptrace call. */
409 tid = GET_THREAD_ID (inferior_ptid);
411 ret = ptrace (PTRACE_GETREGS, tid, 0, ®s);
414 warning (_("Unable to fetch general register."));
418 if (regno >= ARM_A1_REGNUM && regno < ARM_PC_REGNUM)
419 regcache_raw_supply (current_regcache, regno, (char *) ®s[regno]);
421 if (ARM_PS_REGNUM == regno)
424 regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
425 (char *) ®s[ARM_CPSR_REGNUM]);
427 regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
428 (char *) ®s[ARM_PC_REGNUM]);
431 if (ARM_PC_REGNUM == regno)
433 regs[ARM_PC_REGNUM] = ADDR_BITS_REMOVE (regs[ARM_PC_REGNUM]);
434 regcache_raw_supply (current_regcache, ARM_PC_REGNUM,
435 (char *) ®s[ARM_PC_REGNUM]);
439 /* Fetch all general registers of the process and store into
448 /* Get the thread id for the ptrace call. */
449 tid = GET_THREAD_ID (inferior_ptid);
451 ret = ptrace (PTRACE_GETREGS, tid, 0, ®s);
454 warning (_("Unable to fetch general registers."));
458 for (regno = ARM_A1_REGNUM; regno < ARM_PC_REGNUM; regno++)
459 regcache_raw_supply (current_regcache, regno, (char *) ®s[regno]);
462 regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
463 (char *) ®s[ARM_CPSR_REGNUM]);
465 regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
466 (char *) ®s[ARM_PC_REGNUM]);
468 regs[ARM_PC_REGNUM] = ADDR_BITS_REMOVE (regs[ARM_PC_REGNUM]);
469 regcache_raw_supply (current_regcache, ARM_PC_REGNUM,
470 (char *) ®s[ARM_PC_REGNUM]);
473 /* Store all general registers of the process from the values in
477 store_register (int regno)
482 if (!register_cached (regno))
485 /* Get the thread id for the ptrace call. */
486 tid = GET_THREAD_ID (inferior_ptid);
488 /* Get the general registers from the process. */
489 ret = ptrace (PTRACE_GETREGS, tid, 0, ®s);
492 warning (_("Unable to fetch general registers."));
496 if (regno >= ARM_A1_REGNUM && regno <= ARM_PC_REGNUM)
497 regcache_raw_collect (current_regcache, regno, (char *) ®s[regno]);
498 else if (arm_apcs_32 && regno == ARM_PS_REGNUM)
499 regcache_raw_collect (current_regcache, regno,
500 (char *) ®s[ARM_CPSR_REGNUM]);
501 else if (!arm_apcs_32 && regno == ARM_PS_REGNUM)
502 regcache_raw_collect (current_regcache, ARM_PC_REGNUM,
503 (char *) ®s[ARM_PC_REGNUM]);
505 ret = ptrace (PTRACE_SETREGS, tid, 0, ®s);
508 warning (_("Unable to store general register."));
519 /* Get the thread id for the ptrace call. */
520 tid = GET_THREAD_ID (inferior_ptid);
522 /* Fetch the general registers. */
523 ret = ptrace (PTRACE_GETREGS, tid, 0, ®s);
526 warning (_("Unable to fetch general registers."));
530 for (regno = ARM_A1_REGNUM; regno <= ARM_PC_REGNUM; regno++)
532 if (register_cached (regno))
533 regcache_raw_collect (current_regcache, regno, (char *) ®s[regno]);
536 if (arm_apcs_32 && register_cached (ARM_PS_REGNUM))
537 regcache_raw_collect (current_regcache, ARM_PS_REGNUM,
538 (char *) ®s[ARM_CPSR_REGNUM]);
540 ret = ptrace (PTRACE_SETREGS, tid, 0, ®s);
544 warning (_("Unable to store general registers."));
549 /* Fetch registers from the child process. Fetch all registers if
550 regno == -1, otherwise fetch all general registers or all floating
551 point registers depending upon the value of regno. */
554 arm_linux_fetch_inferior_registers (int regno)
563 if (regno < ARM_F0_REGNUM || regno > ARM_FPS_REGNUM)
564 fetch_register (regno);
566 if (regno >= ARM_F0_REGNUM && regno <= ARM_FPS_REGNUM)
567 fetch_fpregister (regno);
571 /* Store registers back into the inferior. Store all registers if
572 regno == -1, otherwise store all general registers or all floating
573 point registers depending upon the value of regno. */
576 arm_linux_store_inferior_registers (int regno)
585 if ((regno < ARM_F0_REGNUM) || (regno > ARM_FPS_REGNUM))
586 store_register (regno);
588 if ((regno >= ARM_F0_REGNUM) && (regno <= ARM_FPS_REGNUM))
589 store_fpregister (regno);
593 /* Fill register regno (if it is a general-purpose register) in
594 *gregsetp with the appropriate value from GDB's register array.
595 If regno is -1, do this for all registers. */
598 fill_gregset (gdb_gregset_t *gregsetp, int regno)
603 for (regnum = ARM_A1_REGNUM; regnum <= ARM_PC_REGNUM; regnum++)
604 regcache_raw_collect (current_regcache, regnum,
605 (char *) &(*gregsetp)[regnum]);
607 else if (regno >= ARM_A1_REGNUM && regno <= ARM_PC_REGNUM)
608 regcache_raw_collect (current_regcache, regno,
609 (char *) &(*gregsetp)[regno]);
611 if (ARM_PS_REGNUM == regno || -1 == regno)
614 regcache_raw_collect (current_regcache, ARM_PS_REGNUM,
615 (char *) &(*gregsetp)[ARM_CPSR_REGNUM]);
617 regcache_raw_collect (current_regcache, ARM_PC_REGNUM,
618 (char *) &(*gregsetp)[ARM_PC_REGNUM]);
622 /* Fill GDB's register array with the general-purpose register values
626 supply_gregset (gdb_gregset_t *gregsetp)
630 for (regno = ARM_A1_REGNUM; regno < ARM_PC_REGNUM; regno++)
631 regcache_raw_supply (current_regcache, regno,
632 (char *) &(*gregsetp)[regno]);
635 regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
636 (char *) &(*gregsetp)[ARM_CPSR_REGNUM]);
638 regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
639 (char *) &(*gregsetp)[ARM_PC_REGNUM]);
641 reg_pc = ADDR_BITS_REMOVE ((CORE_ADDR)(*gregsetp)[ARM_PC_REGNUM]);
642 regcache_raw_supply (current_regcache, ARM_PC_REGNUM, (char *) ®_pc);
645 /* Fill register regno (if it is a floating-point register) in
646 *fpregsetp with the appropriate value from GDB's register array.
647 If regno is -1, do this for all registers. */
650 fill_fpregset (gdb_fpregset_t *fpregsetp, int regno)
652 FPA11 *fp = (FPA11 *) fpregsetp;
657 for (regnum = ARM_F0_REGNUM; regnum <= ARM_F7_REGNUM; regnum++)
658 store_nwfpe_register (regnum, fp);
660 else if (regno >= ARM_F0_REGNUM && regno <= ARM_F7_REGNUM)
662 store_nwfpe_register (regno, fp);
667 if (ARM_FPS_REGNUM == regno || -1 == regno)
668 regcache_raw_collect (current_regcache, ARM_FPS_REGNUM,
672 /* Fill GDB's register array with the floating-point register values
676 supply_fpregset (gdb_fpregset_t *fpregsetp)
679 FPA11 *fp = (FPA11 *) fpregsetp;
682 regcache_raw_supply (current_regcache, ARM_FPS_REGNUM, (char *) &fp->fpsr);
684 /* Fetch the floating point registers. */
685 for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++)
687 fetch_nwfpe_register (regno, fp);
692 arm_linux_kernel_u_size (void)
694 return (sizeof (struct user));
698 get_linux_version (unsigned int *vmajor,
699 unsigned int *vminor,
700 unsigned int *vrelease)
703 char *pmajor, *pminor, *prelease, *tail;
705 if (-1 == uname (&info))
707 warning (_("Unable to determine GNU/Linux version."));
711 pmajor = strtok (info.release, ".");
712 pminor = strtok (NULL, ".");
713 prelease = strtok (NULL, ".");
715 *vmajor = (unsigned int) strtoul (pmajor, &tail, 0);
716 *vminor = (unsigned int) strtoul (pminor, &tail, 0);
717 *vrelease = (unsigned int) strtoul (prelease, &tail, 0);
719 return ((*vmajor << 16) | (*vminor << 8) | *vrelease);
722 void _initialize_arm_linux_nat (void);
725 _initialize_arm_linux_nat (void)
727 struct target_ops *t;
729 os_version = get_linux_version (&os_major, &os_minor, &os_release);
731 /* Fill in the generic GNU/Linux methods. */
734 /* Add our register access methods. */
735 t->to_fetch_registers = arm_linux_fetch_inferior_registers;
736 t->to_store_registers = arm_linux_store_inferior_registers;
738 /* Register the target. */