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 "defs.h"
  21 #include "inferior.h"
  22 #include "target.h"
  23
  24 #include "elf/common.h"
  25
  26 #include <sys/types.h>
  27 #include <sys/ptrace.h>
  28 #include <machine/reg.h>
  29
  30 #include "fbsd-nat.h"
  31 #include "arm-tdep.h"
  32 #include "arm-fbsd-tdep.h"
  33 #include "inf-ptrace.h"
  34
  35 struct arm_fbsd_nat_target : public fbsd_nat_target
  36 {
  37   void fetch_registers (struct regcache *, int) override;
  38   void store_registers (struct regcache *, int) override;
  39   const struct target_desc *read_description () override;
  40 };
  41
  42 static arm_fbsd_nat_target the_arm_fbsd_nat_target;
  43
  44 /* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
  45    for all registers.  */
  46
  47 void
  48 arm_fbsd_nat_target::fetch_registers (struct regcache *regcache, int regnum)
  49 {
  50   fetch_register_set<struct reg> (regcache, regnum, PT_GETREGS,
  51                                   &arm_fbsd_gregset);
  52 #ifdef PT_GETVFPREGS
  53   fetch_register_set<struct vfpreg> (regcache, regnum, PT_GETVFPREGS,
  54                                      &arm_fbsd_vfpregset);
  55 #endif
  56 #ifdef PT_GETREGSET
  57   gdbarch *gdbarch = regcache->arch ();
  58   arm_gdbarch_tdep *tdep = gdbarch_tdep<arm_gdbarch_tdep> (gdbarch);
  59
  60   if (tdep->tls_regnum > 0)
  61     fetch_regset<uint32_t> (regcache, regnum, NT_ARM_TLS, &arm_fbsd_tls_regset,
  62                             tdep->tls_regnum);
  63 #endif
  64 }
  65
  66 /* Store register REGNUM back into the inferior.  If REGNUM is -1, do
  67    this for all registers.  */
  68
  69 void
  70 arm_fbsd_nat_target::store_registers (struct regcache *regcache, int regnum)
  71 {
  72   store_register_set<struct reg> (regcache, regnum, PT_GETREGS, PT_SETREGS,
  73                                   &arm_fbsd_gregset);
  74 #ifdef PT_GETVFPREGS
  75   store_register_set<struct vfpreg> (regcache, regnum, PT_GETVFPREGS,
  76                                      PT_SETVFPREGS, &arm_fbsd_vfpregset);
  77 #endif
  78 #ifdef PT_GETREGSET
  79   gdbarch *gdbarch = regcache->arch ();
  80   arm_gdbarch_tdep *tdep = gdbarch_tdep<arm_gdbarch_tdep> (gdbarch);
  81
  82   if (tdep->tls_regnum > 0)
  83     store_regset<uint32_t> (regcache, regnum, NT_ARM_TLS, &arm_fbsd_tls_regset,
  84                             tdep->tls_regnum);
  85 #endif
  86 }
  87
  88 /* Implement the to_read_description method.  */
  89
  90 const struct target_desc *
  91 arm_fbsd_nat_target::read_description ()
  92 {
  93   const struct target_desc *desc;
  94   bool tls = false;
  95
  96   if (inferior_ptid == null_ptid)
  97     return this->beneath ()->read_description ();
  98
  99 #ifdef PT_GETREGSET
 100   tls = have_regset (inferior_ptid, NT_ARM_TLS) != 0;
 101 #endif
 102   desc = arm_fbsd_read_description_auxv (tls);
 103   if (desc == NULL)
 104     desc = this->beneath ()->read_description ();
 105   return desc;
 106 }
 107
 108 void _initialize_arm_fbsd_nat ();
 109 void
 110 _initialize_arm_fbsd_nat ()
 111 {
 112   add_inf_child_target (&the_arm_fbsd_nat_target);
 113 }