gdb/aarch32-linux-nat.c

   1 /* Copyright (C) 1999-2016 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 #include "defs.h"
  19
  20 #include "regcache.h"
  21 #include "arm-tdep.h"
  22 #include "arm-linux-tdep.h"
  23 #include "arch/arm-linux.h"
  24
  25 #include "aarch32-linux-nat.h"
  26
  27 /* Supply GP registers contents, stored in REGS, to REGCACHE.  ARM_APCS_32
  28    is true if the 32-bit mode is in use, otherwise, it is false.  */
  29
  30 void
  31 aarch32_gp_regcache_supply (struct regcache *regcache, uint32_t *regs,
  32                             int arm_apcs_32)
  33 {
  34   int regno;
  35
  36   for (regno = ARM_A1_REGNUM; regno < ARM_PC_REGNUM; regno++)
  37     regcache_raw_supply (regcache, regno, &regs[regno]);
  38
  39   if (arm_apcs_32)
  40     regcache_raw_supply (regcache, ARM_PS_REGNUM, &regs[ARM_CPSR_GREGNUM]);
  41   else
  42     regcache_raw_supply (regcache, ARM_PS_REGNUM, &regs[ARM_PC_REGNUM]);
  43
  44   regs[ARM_PC_REGNUM] = gdbarch_addr_bits_remove
  45                           (get_regcache_arch (regcache), regs[ARM_PC_REGNUM]);
  46   regcache_raw_supply (regcache, ARM_PC_REGNUM, &regs[ARM_PC_REGNUM]);
  47 }
  48
  49 /* Collect GP registers from REGCACHE to buffer REGS.  ARM_APCS_32 is
  50    true if the 32-bit mode is in use, otherwise, it is false.  */
  51
  52 void
  53 aarch32_gp_regcache_collect (const struct regcache *regcache, uint32_t *regs,
  54                              int arm_apcs_32)
  55 {
  56   int regno;
  57
  58   for (regno = ARM_A1_REGNUM; regno <= ARM_PC_REGNUM; regno++)
  59     {
  60       if (REG_VALID == regcache_register_status (regcache, regno))
  61         regcache_raw_collect (regcache, regno, &regs[regno]);
  62     }
  63
  64   if (arm_apcs_32
  65       && REG_VALID == regcache_register_status (regcache, ARM_PS_REGNUM))
  66     regcache_raw_collect (regcache, ARM_PS_REGNUM,
  67                           &regs[ARM_CPSR_GREGNUM]);
  68 }
  69
  70 /* Supply VFP registers contents, stored in REGS, to REGCACHE.
  71    VFP_REGISTER_COUNT is the number of VFP registers.  */
  72
  73 void
  74 aarch32_vfp_regcache_supply (struct regcache *regcache, gdb_byte *regs,
  75                              const int vfp_register_count)
  76 {
  77   int regno;
  78
  79   for (regno = 0; regno < vfp_register_count; regno++)
  80     regcache_raw_supply (regcache, regno + ARM_D0_REGNUM,
  81                          regs + regno * 8);
  82
  83   regcache_raw_supply (regcache, ARM_FPSCR_REGNUM,
  84                        regs + 32 * 8);
  85 }
  86
  87 /* Collect VFP registers from REGCACHE to buffer REGS.
  88    VFP_REGISTER_COUNT is the number VFP registers.  */
  89
  90 void
  91 aarch32_vfp_regcache_collect (const struct regcache *regcache, gdb_byte *regs,
  92                               const int vfp_register_count)
  93 {
  94   int regno;
  95
  96   for (regno = 0; regno < vfp_register_count; regno++)
  97     regcache_raw_collect (regcache, regno + ARM_D0_REGNUM, regs + regno * 8);
  98
  99   regcache_raw_collect (regcache, ARM_FPSCR_REGNUM, regs + 32 * 8);
 100 }