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, ®s[regno]); 38 39 if (arm_apcs_32) 40 { 41 /* Clear reserved bits bit 20 to bit 23. */ 42 regs[ARM_CPSR_GREGNUM] &= 0xff0fffff; 43 regcache_raw_supply (regcache, ARM_PS_REGNUM, ®s[ARM_CPSR_GREGNUM]); 44 } 45 else 46 regcache_raw_supply (regcache, ARM_PS_REGNUM, ®s[ARM_PC_REGNUM]); 47 48 regs[ARM_PC_REGNUM] = gdbarch_addr_bits_remove 49 (get_regcache_arch (regcache), regs[ARM_PC_REGNUM]); 50 regcache_raw_supply (regcache, ARM_PC_REGNUM, ®s[ARM_PC_REGNUM]); 51 } 52 53 /* Collect GP registers from REGCACHE to buffer REGS. ARM_APCS_32 is 54 true if the 32-bit mode is in use, otherwise, it is false. */ 55 56 void 57 aarch32_gp_regcache_collect (const struct regcache *regcache, uint32_t *regs, 58 int arm_apcs_32) 59 { 60 int regno; 61 62 for (regno = ARM_A1_REGNUM; regno <= ARM_PC_REGNUM; regno++) 63 { 64 if (REG_VALID == regcache_register_status (regcache, regno)) 65 regcache_raw_collect (regcache, regno, ®s[regno]); 66 } 67 68 if (arm_apcs_32 69 && REG_VALID == regcache_register_status (regcache, ARM_PS_REGNUM)) 70 { 71 uint32_t cpsr = regs[ARM_CPSR_GREGNUM]; 72 73 regcache_raw_collect (regcache, ARM_PS_REGNUM, 74 ®s[ARM_CPSR_GREGNUM]); 75 /* Keep reserved bits bit 20 to bit 23. */ 76 regs[ARM_CPSR_GREGNUM] = ((regs[ARM_CPSR_GREGNUM] & 0xff0fffff) 77 | (cpsr & 0x00f00000)); 78 } 79 } 80 81 /* Supply VFP registers contents, stored in REGS, to REGCACHE. 82 VFP_REGISTER_COUNT is the number of VFP registers. */ 83 84 void 85 aarch32_vfp_regcache_supply (struct regcache *regcache, gdb_byte *regs, 86 const int vfp_register_count) 87 { 88 int regno; 89 90 for (regno = 0; regno < vfp_register_count; regno++) 91 regcache_raw_supply (regcache, regno + ARM_D0_REGNUM, 92 regs + regno * 8); 93 94 regcache_raw_supply (regcache, ARM_FPSCR_REGNUM, 95 regs + 32 * 8); 96 } 97 98 /* Collect VFP registers from REGCACHE to buffer REGS. 99 VFP_REGISTER_COUNT is the number VFP registers. */ 100 101 void 102 aarch32_vfp_regcache_collect (const struct regcache *regcache, gdb_byte *regs, 103 const int vfp_register_count) 104 { 105 int regno; 106 107 for (regno = 0; regno < vfp_register_count; regno++) 108 regcache_raw_collect (regcache, regno + ARM_D0_REGNUM, regs + regno * 8); 109 110 regcache_raw_collect (regcache, ARM_FPSCR_REGNUM, regs + 32 * 8); 111 } 112