gdb/arm-fbsd-nat.c

   1 /* Native-dependent code for FreeBSD/arm.
   2
   3    Copyright (C) 2017-2024 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   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.
  11
  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.
  16
  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/>.  */
  19
  20 #include "inferior.h"
  21 #include "target.h"
  22
  23 #include "elf/common.h"
  24
  25 #include <sys/types.h>
  26 #include <sys/ptrace.h>
  27 #include <machine/reg.h>
  28
  29 #include "fbsd-nat.h"
  30 #include "arm-tdep.h"
  31 #include "arm-fbsd-tdep.h"
  32 #include "inf-ptrace.h"
  33
  34 struct arm_fbsd_nat_target : public fbsd_nat_target
  35 {
  36   void fetch_registers (struct regcache *, int) override;
  37   void store_registers (struct regcache *, int) override;
  38   const struct target_desc *read_description () override;
  39 };
  40
  41 static arm_fbsd_nat_target the_arm_fbsd_nat_target;
  42
  43 /* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
  44    for all registers.  */
  45
  46 void
  47 arm_fbsd_nat_target::fetch_registers (struct regcache *regcache, int regnum)
  48 {
  49   fetch_register_set<struct reg> (regcache, regnum, PT_GETREGS,
  50                                   &arm_fbsd_gregset);
  51 #ifdef PT_GETVFPREGS
  52   fetch_register_set<struct vfpreg> (regcache, regnum, PT_GETVFPREGS,
  53                                      &arm_fbsd_vfpregset);
  54 #endif
  55 #ifdef PT_GETREGSET
  56   gdbarch *gdbarch = regcache->arch ();
  57   arm_gdbarch_tdep *tdep = gdbarch_tdep<arm_gdbarch_tdep> (gdbarch);
  58
  59   if (tdep->tls_regnum > 0)
  60     fetch_regset<uint32_t> (regcache, regnum, NT_ARM_TLS, &arm_fbsd_tls_regset,
  61                             tdep->tls_regnum);
  62 #endif
  63 }
  64
  65 /* Store register REGNUM back into the inferior.  If REGNUM is -1, do
  66    this for all registers.  */
  67
  68 void
  69 arm_fbsd_nat_target::store_registers (struct regcache *regcache, int regnum)
  70 {
  71   store_register_set<struct reg> (regcache, regnum, PT_GETREGS, PT_SETREGS,
  72                                   &arm_fbsd_gregset);
  73 #ifdef PT_GETVFPREGS
  74   store_register_set<struct vfpreg> (regcache, regnum, PT_GETVFPREGS,
  75                                      PT_SETVFPREGS, &arm_fbsd_vfpregset);
  76 #endif
  77 #ifdef PT_GETREGSET
  78   gdbarch *gdbarch = regcache->arch ();
  79   arm_gdbarch_tdep *tdep = gdbarch_tdep<arm_gdbarch_tdep> (gdbarch);
  80
  81   if (tdep->tls_regnum > 0)
  82     store_regset<uint32_t> (regcache, regnum, NT_ARM_TLS, &arm_fbsd_tls_regset,
  83                             tdep->tls_regnum);
  84 #endif
  85 }
  86
  87 /* Implement the to_read_description method.  */
  88
  89 const struct target_desc *
  90 arm_fbsd_nat_target::read_description ()
  91 {
  92   const struct target_desc *desc;
  93   bool tls = false;
  94
  95   if (inferior_ptid == null_ptid)
  96     return this->beneath ()->read_description ();
  97
  98 #ifdef PT_GETREGSET
  99   tls = have_regset (inferior_ptid, NT_ARM_TLS) != 0;
 100 #endif
 101   desc = arm_fbsd_read_description_auxv (tls);
 102   if (desc == NULL)
 103     desc = this->beneath ()->read_description ();
 104   return desc;
 105 }
 106
 107 void _initialize_arm_fbsd_nat ();
 108 void
 109 _initialize_arm_fbsd_nat ()
 110 {
 111   add_inf_child_target (&the_arm_fbsd_nat_target);
 112 }