1 /* Target-dependent code for ARM BSD's. 2 3 Copyright (C) 2006-2020 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 "osabi.h" 22 #include "regcache.h" 23 #include "regset.h" 24 25 #include "arm-tdep.h" 26 27 /* Core file support. */ 28 29 /* Sizeof `struct reg' in <machine/reg.h>. */ 30 #define ARMBSD_SIZEOF_GREGS (17 * 4) 31 32 /* Sizeof `struct fpreg' in <machine/reg.h. */ 33 #define ARMBSD_SIZEOF_FPREGS ((1 + (8 * 3)) * 4) 34 35 static int 36 armbsd_fpreg_offset (int regnum) 37 { 38 if (regnum == ARM_FPS_REGNUM) 39 return 0; 40 41 return 4 + (regnum - ARM_F0_REGNUM) * 12; 42 } 43 44 /* Supply register REGNUM from the buffer specified by FPREGS and LEN 45 in the floating-point register set REGSET to register cache 46 REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ 47 48 static void 49 armbsd_supply_fpregset (const struct regset *regset, 50 struct regcache *regcache, 51 int regnum, const void *fpregs, size_t len) 52 { 53 const gdb_byte *regs = (const gdb_byte *) fpregs; 54 int i; 55 56 gdb_assert (len >= ARMBSD_SIZEOF_FPREGS); 57 58 for (i = ARM_F0_REGNUM; i <= ARM_FPS_REGNUM; i++) 59 { 60 if (regnum == i || regnum == -1) 61 regcache->raw_supply (i, regs + armbsd_fpreg_offset (i)); 62 } 63 } 64 65 /* Supply register REGNUM from the buffer specified by GREGS and LEN 66 in the general-purpose register set REGSET to register cache 67 REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ 68 69 static void 70 armbsd_supply_gregset (const struct regset *regset, 71 struct regcache *regcache, 72 int regnum, const void *gregs, size_t len) 73 { 74 const gdb_byte *regs = (const gdb_byte *) gregs; 75 int i; 76 77 gdb_assert (len >= ARMBSD_SIZEOF_GREGS); 78 79 for (i = ARM_A1_REGNUM; i <= ARM_PC_REGNUM; i++) 80 { 81 if (regnum == i || regnum == -1) 82 regcache->raw_supply (i, regs + i * 4); 83 } 84 85 if (regnum == ARM_PS_REGNUM || regnum == -1) 86 regcache->raw_supply (i, regs + 16 * 4); 87 88 if (len >= ARMBSD_SIZEOF_GREGS + ARMBSD_SIZEOF_FPREGS) 89 { 90 regs += ARMBSD_SIZEOF_GREGS; 91 len -= ARMBSD_SIZEOF_GREGS; 92 armbsd_supply_fpregset (regset, regcache, regnum, regs, len); 93 } 94 } 95 96 /* ARM register sets. */ 97 98 static const struct regset armbsd_gregset = 99 { 100 NULL, 101 armbsd_supply_gregset, 102 NULL, 103 REGSET_VARIABLE_SIZE 104 }; 105 106 static const struct regset armbsd_fpregset = 107 { 108 NULL, 109 armbsd_supply_fpregset 110 }; 111 112 /* Iterate over supported core file register note sections. */ 113 114 void 115 armbsd_iterate_over_regset_sections (struct gdbarch *gdbarch, 116 iterate_over_regset_sections_cb *cb, 117 void *cb_data, 118 const struct regcache *regcache) 119 { 120 cb (".reg", ARMBSD_SIZEOF_GREGS, ARMBSD_SIZEOF_GREGS, &armbsd_gregset, NULL, 121 cb_data); 122 cb (".reg2", ARMBSD_SIZEOF_FPREGS, ARMBSD_SIZEOF_FPREGS, &armbsd_fpregset, 123 NULL, cb_data); 124 } 125