1 /* Copyright (C) 2020-2024 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 #include <sys/types.h> 19 #include <sys/ptrace.h> 20 #include <limits.h> 21 22 #include "netbsd-low.h" 23 #include "gdbsupport/x86-xstate.h" 24 #include "arch/i386.h" 25 #include "x86-tdesc.h" 26 #include "tdesc.h" 27 28 /* The index of various registers inside the regcache. */ 29 30 enum netbsd_i386_gdb_regnum 31 { 32 I386_EAX_REGNUM, /* %eax */ 33 I386_ECX_REGNUM, /* %ecx */ 34 I386_EDX_REGNUM, /* %edx */ 35 I386_EBX_REGNUM, /* %ebx */ 36 I386_ESP_REGNUM, /* %esp */ 37 I386_EBP_REGNUM, /* %ebp */ 38 I386_ESI_REGNUM, /* %esi */ 39 I386_EDI_REGNUM, /* %edi */ 40 I386_EIP_REGNUM, /* %eip */ 41 I386_EFLAGS_REGNUM, /* %eflags */ 42 I386_CS_REGNUM, /* %cs */ 43 I386_SS_REGNUM, /* %ss */ 44 I386_DS_REGNUM, /* %ds */ 45 I386_ES_REGNUM, /* %es */ 46 I386_FS_REGNUM, /* %fs */ 47 I386_GS_REGNUM, /* %gs */ 48 I386_ST0_REGNUM /* %st(0) */ 49 }; 50 51 /* The fill_function for the general-purpose register set. */ 52 53 static void 54 netbsd_i386_fill_gregset (struct regcache *regcache, char *buf) 55 { 56 struct reg *r = (struct reg *) buf; 57 58 #define netbsd_i386_collect_gp(regnum, fld) do { \ 59 collect_register (regcache, regnum, &r->r_##fld); \ 60 } while (0) 61 62 netbsd_i386_collect_gp (I386_EAX_REGNUM, eax); 63 netbsd_i386_collect_gp (I386_EBX_REGNUM, ebx); 64 netbsd_i386_collect_gp (I386_ECX_REGNUM, ecx); 65 netbsd_i386_collect_gp (I386_EDX_REGNUM, edx); 66 netbsd_i386_collect_gp (I386_ESP_REGNUM, esp); 67 netbsd_i386_collect_gp (I386_EBP_REGNUM, ebp); 68 netbsd_i386_collect_gp (I386_ESI_REGNUM, esi); 69 netbsd_i386_collect_gp (I386_EDI_REGNUM, edi); 70 netbsd_i386_collect_gp (I386_EIP_REGNUM, eip); 71 netbsd_i386_collect_gp (I386_EFLAGS_REGNUM, eflags); 72 netbsd_i386_collect_gp (I386_CS_REGNUM, cs); 73 netbsd_i386_collect_gp (I386_SS_REGNUM, ss); 74 netbsd_i386_collect_gp (I386_DS_REGNUM, ds); 75 netbsd_i386_collect_gp (I386_ES_REGNUM, es); 76 netbsd_i386_collect_gp (I386_FS_REGNUM, fs); 77 netbsd_i386_collect_gp (I386_GS_REGNUM, gs); 78 } 79 80 /* The store_function for the general-purpose register set. */ 81 82 static void 83 netbsd_i386_store_gregset (struct regcache *regcache, const char *buf) 84 { 85 struct reg *r = (struct reg *) buf; 86 87 #define netbsd_i386_supply_gp(regnum, fld) do { \ 88 supply_register (regcache, regnum, &r->r_##fld); \ 89 } while(0) 90 91 netbsd_i386_supply_gp (I386_EAX_REGNUM, eax); 92 netbsd_i386_supply_gp (I386_EBX_REGNUM, ebx); 93 netbsd_i386_supply_gp (I386_ECX_REGNUM, ecx); 94 netbsd_i386_supply_gp (I386_EDX_REGNUM, edx); 95 netbsd_i386_supply_gp (I386_ESP_REGNUM, esp); 96 netbsd_i386_supply_gp (I386_EBP_REGNUM, ebp); 97 netbsd_i386_supply_gp (I386_ESI_REGNUM, esi); 98 netbsd_i386_supply_gp (I386_EDI_REGNUM, edi); 99 netbsd_i386_supply_gp (I386_EIP_REGNUM, eip); 100 netbsd_i386_supply_gp (I386_EFLAGS_REGNUM, eflags); 101 netbsd_i386_supply_gp (I386_CS_REGNUM, cs); 102 netbsd_i386_supply_gp (I386_SS_REGNUM, ss); 103 netbsd_i386_supply_gp (I386_DS_REGNUM, ds); 104 netbsd_i386_supply_gp (I386_ES_REGNUM, es); 105 netbsd_i386_supply_gp (I386_FS_REGNUM, fs); 106 netbsd_i386_supply_gp (I386_GS_REGNUM, gs); 107 } 108 109 /* Description of all the x86-netbsd register sets. */ 110 111 static const struct netbsd_regset_info netbsd_target_regsets[] = 112 { 113 /* General Purpose Registers. */ 114 {PT_GETREGS, PT_SETREGS, sizeof (struct reg), 115 netbsd_i386_fill_gregset, netbsd_i386_store_gregset}, 116 /* End of list marker. */ 117 {0, 0, -1, NULL, NULL } 118 }; 119 120 /* NetBSD target op definitions for the amd64 architecture. */ 121 122 class netbsd_i386_target : public netbsd_process_target 123 { 124 public: 125 const netbsd_regset_info *get_regs_info () override; 126 127 void low_arch_setup () override; 128 }; 129 130 const netbsd_regset_info * 131 netbsd_i386_target::get_regs_info () 132 { 133 return netbsd_target_regsets; 134 } 135 136 /* Initialize the target description for the architecture of the 137 inferior. */ 138 139 void 140 netbsd_i386_target::low_arch_setup () 141 { 142 target_desc *tdesc 143 = i386_create_target_description (X86_XSTATE_SSE_MASK, false, false); 144 145 init_target_desc (tdesc, i386_expedite_regs); 146 147 current_process ()->tdesc = tdesc; 148 } 149 150 /* The singleton target ops object. */ 151 152 static netbsd_i386_target the_netbsd_i386_target; 153 154 /* The NetBSD target ops object. */ 155 156 netbsd_process_target *the_netbsd_target = &the_netbsd_i386_target; 157