gdb/hppabsd-nat.c - gdb

Functions defined

Source code

  1. /* Native-dependent code for HP PA-RISC BSD's.

  3.    Copyright (C) 2004-2015 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 3 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, see <http://www.gnu.org/licenses/>.  */

  20. #include "defs.h"
  21. #include "inferior.h"
  22. #include "regcache.h"
  23. #include "target.h"

  25. #include <sys/types.h>
  26. #include <sys/ptrace.h>
  27. #include <machine/reg.h>

  29. #include "hppa-tdep.h"
  30. #include "inf-ptrace.h"

  32. static int
  33. ‌hppabsd_gregset_supplies_p (int regnum)
  34. {
  35.   return (regnum >= HPPA_R0_REGNUM && regnum <= HPPA_CR27_REGNUM);
  36. }

  38. static int
  39. ‌hppabsd_fpregset_supplies_p (int regnum)
  40. {
  41.   return (regnum >= HPPA_FP0_REGNUM && regnum <= HPPA_FP31R_REGNUM);
  42. }

  44. /* Supply the general-purpose registers stored in GREGS to REGCACHE.  */

  46. static void
  47. ‌hppabsd_supply_gregset (struct regcache *regcache, const void *gregs)
  48. {
  49.   gdb_byte zero[4] = { 0 };
  50.   const char *regs = gregs;
  51.   int regnum;

  53.   regcache_raw_supply (regcache, HPPA_R0_REGNUM, &zero);
  54.   for (regnum = HPPA_R1_REGNUM; regnum <= HPPA_R31_REGNUM; regnum++)
  55.     regcache_raw_supply (regcache, regnum, regs + regnum * 4);

  57.   if (sizeof(struct reg) >= 46 * 4)
  58.     {
  59.       regcache_raw_supply (regcache, HPPA_IPSW_REGNUM, regs);
  60.       regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs + 32 * 4);
  61.       regcache_raw_supply (regcache, HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
  62.       regcache_raw_supply (regcache, HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
  63.       regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
  64.       regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
  65.       regcache_raw_supply (regcache, HPPA_SR0_REGNUM, regs + 37 * 4);
  66.       regcache_raw_supply (regcache, HPPA_SR1_REGNUM, regs + 38 * 4);
  67.       regcache_raw_supply (regcache, HPPA_SR2_REGNUM, regs + 39 * 4);
  68.       regcache_raw_supply (regcache, HPPA_SR3_REGNUM, regs + 40 * 4);
  69.       regcache_raw_supply (regcache, HPPA_SR4_REGNUM, regs + 41 * 4);
  70.       regcache_raw_supply (regcache, HPPA_SR5_REGNUM, regs + 42 * 4);
  71.       regcache_raw_supply (regcache, HPPA_SR6_REGNUM, regs + 43 * 4);
  72.       regcache_raw_supply (regcache, HPPA_SR7_REGNUM, regs + 44 * 4);
  73.       regcache_raw_supply (regcache, HPPA_CR26_REGNUM, regs + 45 * 4);
  74.       regcache_raw_supply (regcache, HPPA_CR27_REGNUM, regs + 46 * 4);
  75.     }
  76.   else
  77.     {
  78.       regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs);
  79.       regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
  80.       regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
  81.     }
  82. }

  84. /* Supply the floating-point registers stored in FPREGS to REGCACHE.  */

  86. static void
  87. ‌hppabsd_supply_fpregset (struct regcache *regcache, const void *fpregs)
  88. {
  89.   const char *regs = fpregs;
  90.   int regnum;

  92.   for (regnum = HPPA_FP0_REGNUM; regnum <= HPPA_FP31R_REGNUM;
  93.        regnum += 2, regs += 8)
  94.     {
  95.       regcache_raw_supply (regcache, regnum, regs);
  96.       regcache_raw_supply (regcache, regnum + 1, regs + 4);
  97.     }
  98. }

  100. /* Collect the general-purpose registers from REGCACHE and store them
  101.    in GREGS.  */

  103. static void
  104. ‌hppabsd_collect_gregset (const struct regcache *regcache,
  105.                           void *gregs, int regnum)
  106. {
  107.   char *regs = gregs;
  108.   int i;

  110.   for (i = HPPA_R1_REGNUM; i <= HPPA_R31_REGNUM; i++)
  111.     {
  112.       if (regnum == -1 || regnum == i)
  113.         regcache_raw_collect (regcache, i, regs + i * 4);
  114.     }

  116.   if (sizeof(struct reg) >= 46 * 4)
  117.     {
  118.       if (regnum == -1 || regnum == HPPA_IPSW_REGNUM)
  119.         regcache_raw_collect (regcache, HPPA_IPSW_REGNUM, regs);
  120.       if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
  121.         regcache_raw_collect (regcache, HPPA_SAR_REGNUM, regs + 32 * 4);
  122.       if (regnum == -1 || regnum == HPPA_PCSQ_HEAD_REGNUM)
  123.         regcache_raw_collect (regcache, HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
  124.       if (regnum == -1 || regnum == HPPA_PCSQ_TAIL_REGNUM)
  125.         regcache_raw_collect (regcache, HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
  126.       if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
  127.         regcache_raw_collect (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
  128.       if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
  129.         regcache_raw_collect (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
  130.       if (regnum == -1 || regnum == HPPA_SR0_REGNUM)
  131.         regcache_raw_collect (regcache, HPPA_SR0_REGNUM, regs + 37 * 4);
  132.       if (regnum == -1 || regnum == HPPA_SR1_REGNUM)
  133.         regcache_raw_collect (regcache, HPPA_SR1_REGNUM, regs + 38 * 4);
  134.       if (regnum == -1 || regnum == HPPA_SR2_REGNUM)
  135.         regcache_raw_collect (regcache, HPPA_SR2_REGNUM, regs + 39 * 4);
  136.       if (regnum == -1 || regnum == HPPA_SR3_REGNUM)
  137.         regcache_raw_collect (regcache, HPPA_SR3_REGNUM, regs + 40 * 4);
  138.       if (regnum == -1 || regnum == HPPA_SR4_REGNUM)
  139.         regcache_raw_collect (regcache, HPPA_SR4_REGNUM, regs + 41 * 4);
  140.       if (regnum == -1 || regnum == HPPA_SR5_REGNUM)
  141.         regcache_raw_collect (regcache, HPPA_SR5_REGNUM, regs + 42 * 4);
  142.       if (regnum == -1 || regnum == HPPA_SR6_REGNUM)
  143.         regcache_raw_collect (regcache, HPPA_SR6_REGNUM, regs + 43 * 4);
  144.       if (regnum == -1 || regnum == HPPA_SR7_REGNUM)
  145.         regcache_raw_collect (regcache, HPPA_SR7_REGNUM, regs + 44 * 4);
  146.       if (regnum == -1 || regnum == HPPA_CR26_REGNUM)
  147.         regcache_raw_collect (regcache, HPPA_CR26_REGNUM, regs + 45 * 4);
  148.       if (regnum == -1 || regnum == HPPA_CR27_REGNUM)
  149.         regcache_raw_collect (regcache, HPPA_CR27_REGNUM, regs + 46 * 4);
  150.     }
  151.   else
  152.     {
  153.       if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
  154.         regcache_raw_collect (regcache, HPPA_SAR_REGNUM, regs);
  155.       if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
  156.         regcache_raw_collect (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
  157.       if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
  158.         regcache_raw_collect (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
  159.     }
  160. }

  162. /* Collect the floating-point registers from REGCACHE and store them
  163.    in FPREGS.  */

  165. static void
  166. ‌hppabsd_collect_fpregset (struct regcache *regcache,
  167.                           void *fpregs, int regnum)
  168. {
  169.   char *regs = fpregs;
  170.   int i;

  172.   for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i += 2, regs += 8)
  173.     {
  174.       if (regnum == -1 || regnum == i || regnum == i + 1)
  175.         {
  176.           regcache_raw_collect (regcache, i, regs);
  177.           regcache_raw_collect (regcache, i + 1, regs + 4);
  178.         }
  179.     }
  180. }


  183. /* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
  184.    for all registers (including the floating-point registers).  */

  186. static void
  187. ‌hppabsd_fetch_registers (struct target_ops *ops,
  188.                          struct regcache *regcache, int regnum)
  189. {
  190.   if (regnum == -1 || hppabsd_gregset_supplies_p (regnum))
  191.     {
  192.       struct reg regs;

  194.       if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid),
  195.                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  196.         perror_with_name (_("Couldn't get registers"));

  198.       hppabsd_supply_gregset (regcache, &regs);
  199.     }

  201.   if (regnum == -1 || hppabsd_fpregset_supplies_p (regnum))
  202.     {
  203.       struct fpreg fpregs;

  205.       if (ptrace (PT_GETFPREGS, ptid_get_pid (inferior_ptid),
  206.                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
  207.         perror_with_name (_("Couldn't get floating point status"));

  209.       hppabsd_supply_fpregset (regcache, &fpregs);
  210.     }
  211. }

  213. /* Store register REGNUM back into the inferior.  If REGNUM is -1, do
  214.    this for all registers (including the floating-point registers).  */

  216. static void
  217. ‌hppabsd_store_registers (struct target_ops *ops,
  218.                          struct regcache *regcache, int regnum)
  219. {
  220.   if (regnum == -1 || hppabsd_gregset_supplies_p (regnum))
  221.     {
  222.       struct reg regs;

  224.       if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid),
  225.                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  226.         perror_with_name (_("Couldn't get registers"));

  228.       hppabsd_collect_gregset (regcache, &regs, regnum);

  230.       if (ptrace (PT_SETREGS, ptid_get_pid (inferior_ptid),
  231.                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  232.         perror_with_name (_("Couldn't write registers"));
  233.     }

  235.   if (regnum == -1 || hppabsd_fpregset_supplies_p (regnum))
  236.     {
  237.       struct fpreg fpregs;

  239.       if (ptrace (PT_GETFPREGS, ptid_get_pid (inferior_ptid),
  240.                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
  241.         perror_with_name (_("Couldn't get floating point status"));

  243.       hppabsd_collect_fpregset (regcache, &fpregs, regnum);

  245.       if (ptrace (PT_SETFPREGS, ptid_get_pid (inferior_ptid),
  246.                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
  247.         perror_with_name (_("Couldn't write floating point status"));
  248.     }
  249. }

  251. /* Provide a prototype to silence -Wmissing-prototypes.  */
  252. void _initialize_hppabsd_nat (void);

  254. void
  255. ‌_initialize_hppabsd_nat (void)
  256. {
  257.   struct target_ops *t;

  259.   /* Add in local overrides.  */
  260.   t = inf_ptrace_target ();
  261.   t->to_fetch_registers = hppabsd_fetch_registers;
  262.   t->to_store_registers = hppabsd_store_registers;
  263.   add_target (t);
  264. }