gdb/aarch32-linux-nat.c

   1 /* Copyright (C) 1999-2024 Free Software Foundation, Inc.
   2
   3    This file is part of GDB.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18
  19 #include "regcache.h"
  20 #include "arm-tdep.h"
  21 #include "arm-linux-tdep.h"
  22 #include "arch/arm-linux.h"
  23
  24 #include "aarch32-linux-nat.h"
  25
  26 /* Supply GP registers contents, stored in REGS, to REGCACHE.  ARM_APCS_32
  27    is true if the 32-bit mode is in use, otherwise, it is false.  */
  28
  29 void
  30 aarch32_gp_regcache_supply (struct regcache *regcache, uint32_t *regs,
  31                             int arm_apcs_32)
  32 {
  33   int regno;
  34
  35   for (regno = ARM_A1_REGNUM; regno < ARM_PC_REGNUM; regno++)
  36     regcache->raw_supply (regno, &regs[regno]);
  37
  38   if (arm_apcs_32)
  39     {
  40       /* Clear reserved bits bit 20 to bit 23.  */
  41       regs[ARM_CPSR_GREGNUM] &= 0xff0fffff;
  42       regcache->raw_supply (ARM_PS_REGNUM, &regs[ARM_CPSR_GREGNUM]);
  43     }
  44   else
  45     regcache->raw_supply (ARM_PS_REGNUM, &regs[ARM_PC_REGNUM]);
  46
  47   regs[ARM_PC_REGNUM] = gdbarch_addr_bits_remove
  48                           (regcache->arch (), regs[ARM_PC_REGNUM]);
  49   regcache->raw_supply (ARM_PC_REGNUM, &regs[ARM_PC_REGNUM]);
  50 }
  51
  52 /* Collect GP registers from REGCACHE to buffer REGS.  ARM_APCS_32 is
  53    true if the 32-bit mode is in use, otherwise, it is false.  */
  54
  55 void
  56 aarch32_gp_regcache_collect (const struct regcache *regcache, uint32_t *regs,
  57                              int arm_apcs_32)
  58 {
  59   int regno;
  60
  61   for (regno = ARM_A1_REGNUM; regno <= ARM_PC_REGNUM; regno++)
  62     {
  63       if (REG_VALID == regcache->get_register_status (regno))
  64         regcache->raw_collect (regno, &regs[regno]);
  65     }
  66
  67   if (arm_apcs_32
  68       && REG_VALID == regcache->get_register_status (ARM_PS_REGNUM))
  69     {
  70       uint32_t cpsr = regs[ARM_CPSR_GREGNUM];
  71
  72       regcache->raw_collect (ARM_PS_REGNUM, &regs[ARM_CPSR_GREGNUM]);
  73       /* Keep reserved bits bit 20 to bit 23.  */
  74       regs[ARM_CPSR_GREGNUM] = ((regs[ARM_CPSR_GREGNUM] & 0xff0fffff)
  75                                 | (cpsr & 0x00f00000));
  76     }
  77 }
  78
  79 /* Supply VFP registers contents, stored in REGS, to REGCACHE.
  80    VFP_REGISTER_COUNT is the number of VFP registers.  */
  81
  82 void
  83 aarch32_vfp_regcache_supply (struct regcache *regcache, gdb_byte *regs,
  84                              const int vfp_register_count)
  85 {
  86   int regno;
  87
  88   for (regno = 0; regno < vfp_register_count; regno++)
  89     regcache->raw_supply (regno + ARM_D0_REGNUM, regs + regno * 8);
  90
  91   regcache->raw_supply (ARM_FPSCR_REGNUM, regs + 32 * 8);
  92 }
  93
  94 /* Collect VFP registers from REGCACHE to buffer REGS.
  95    VFP_REGISTER_COUNT is the number VFP registers.  */
  96
  97 void
  98 aarch32_vfp_regcache_collect (const struct regcache *regcache, gdb_byte *regs,
  99                               const int vfp_register_count)
 100 {
 101   int regno;
 102
 103   for (regno = 0; regno < vfp_register_count; regno++)
 104     regcache->raw_collect (regno + ARM_D0_REGNUM, regs + regno * 8);
 105
 106   regcache->raw_collect (ARM_FPSCR_REGNUM, regs + 32 * 8);
 107 }