| 1 | /* Copyright (C) 1995-2015 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 "server.h" |
| 19 | #include "arch/arm.h" |
| 20 | #include "linux-low.h" |
| 21 | #include "linux-aarch32-low.h" |
| 22 | |
| 23 | #include <sys/ptrace.h> |
| 24 | /* Don't include elf.h if linux/elf.h got included by gdb_proc_service.h. |
| 25 | On Bionic elf.h and linux/elf.h have conflicting definitions. */ |
| 26 | #ifndef ELFMAG0 |
| 27 | #include <elf.h> |
| 28 | #endif |
| 29 | |
| 30 | /* Some older versions of GNU/Linux and Android do not define |
| 31 | the following macros. */ |
| 32 | #ifndef NT_ARM_VFP |
| 33 | #define NT_ARM_VFP 0x400 |
| 34 | #endif |
| 35 | |
| 36 | /* Collect GP registers from REGCACHE to buffer BUF. */ |
| 37 | |
| 38 | void |
| 39 | arm_fill_gregset (struct regcache *regcache, void *buf) |
| 40 | { |
| 41 | int i; |
| 42 | uint32_t *regs = buf; |
| 43 | |
| 44 | for (i = ARM_A1_REGNUM; i <= ARM_PC_REGNUM; i++) |
| 45 | collect_register (regcache, i, ®s[i]); |
| 46 | |
| 47 | collect_register (regcache, ARM_PS_REGNUM, ®s[16]); |
| 48 | } |
| 49 | |
| 50 | /* Supply GP registers contents, stored in BUF, to REGCACHE. */ |
| 51 | |
| 52 | void |
| 53 | arm_store_gregset (struct regcache *regcache, const void *buf) |
| 54 | { |
| 55 | int i; |
| 56 | char zerobuf[8]; |
| 57 | const uint32_t *regs = buf; |
| 58 | |
| 59 | memset (zerobuf, 0, 8); |
| 60 | for (i = ARM_A1_REGNUM; i <= ARM_PC_REGNUM; i++) |
| 61 | supply_register (regcache, i, ®s[i]); |
| 62 | |
| 63 | for (; i < ARM_PS_REGNUM; i++) |
| 64 | supply_register (regcache, i, zerobuf); |
| 65 | |
| 66 | supply_register (regcache, ARM_PS_REGNUM, ®s[16]); |
| 67 | } |
| 68 | |
| 69 | /* Collect NUM number of VFP registers from REGCACHE to buffer BUF. */ |
| 70 | |
| 71 | void |
| 72 | arm_fill_vfpregset_num (struct regcache *regcache, void *buf, int num) |
| 73 | { |
| 74 | int i, base; |
| 75 | |
| 76 | gdb_assert (num == 16 || num == 32); |
| 77 | |
| 78 | base = find_regno (regcache->tdesc, "d0"); |
| 79 | for (i = 0; i < num; i++) |
| 80 | collect_register (regcache, base + i, (char *) buf + i * 8); |
| 81 | |
| 82 | collect_register_by_name (regcache, "fpscr", (char *) buf + 32 * 8); |
| 83 | } |
| 84 | |
| 85 | /* Supply NUM number of VFP registers contents, stored in BUF, to |
| 86 | REGCACHE. */ |
| 87 | |
| 88 | void |
| 89 | arm_store_vfpregset_num (struct regcache *regcache, const void *buf, int num) |
| 90 | { |
| 91 | int i, base; |
| 92 | |
| 93 | gdb_assert (num == 16 || num == 32); |
| 94 | |
| 95 | base = find_regno (regcache->tdesc, "d0"); |
| 96 | for (i = 0; i < num; i++) |
| 97 | supply_register (regcache, base + i, (char *) buf + i * 8); |
| 98 | |
| 99 | supply_register_by_name (regcache, "fpscr", (char *) buf + 32 * 8); |
| 100 | } |
| 101 | |
| 102 | static void |
| 103 | arm_fill_vfpregset (struct regcache *regcache, void *buf) |
| 104 | { |
| 105 | arm_fill_vfpregset_num (regcache, buf, 32); |
| 106 | } |
| 107 | |
| 108 | static void |
| 109 | arm_store_vfpregset (struct regcache *regcache, const void *buf) |
| 110 | { |
| 111 | arm_store_vfpregset_num (regcache, buf, 32); |
| 112 | } |
| 113 | |
| 114 | /* Register sets with using PTRACE_GETREGSET. */ |
| 115 | |
| 116 | static struct regset_info aarch32_regsets[] = { |
| 117 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PRSTATUS, 18 * 4, |
| 118 | GENERAL_REGS, |
| 119 | arm_fill_gregset, arm_store_gregset }, |
| 120 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_ARM_VFP, 32 * 8 + 4, |
| 121 | EXTENDED_REGS, |
| 122 | arm_fill_vfpregset, arm_store_vfpregset }, |
| 123 | NULL_REGSET |
| 124 | }; |
| 125 | |
| 126 | static struct regsets_info aarch32_regsets_info = |
| 127 | { |
| 128 | aarch32_regsets, /* regsets */ |
| 129 | 0, /* num_regsets */ |
| 130 | NULL, /* disabled_regsets */ |
| 131 | }; |
| 132 | |
| 133 | struct regs_info regs_info_aarch32 = |
| 134 | { |
| 135 | NULL, /* regset_bitmap */ |
| 136 | NULL, /* usrregs */ |
| 137 | &aarch32_regsets_info |
| 138 | }; |
| 139 | |
| 140 | void |
| 141 | initialize_low_arch_aarch32 (void) |
| 142 | { |
| 143 | init_registers_arm_with_neon (); |
| 144 | |
| 145 | initialize_regsets_info (&aarch32_regsets_info); |
| 146 | } |