1 /* Copyright (C) 2020-2023 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 "server.h" 23 #include "netbsd-low.h" 24 #include "gdbsupport/x86-xstate.h" 25 #include "arch/i386.h" 26 #include "x86-tdesc.h" 27 #include "tdesc.h" 28 29 /* The index of various registers inside the regcache. */ 30 31 enum netbsd_i386_gdb_regnum 32 { 33 I386_EAX_REGNUM, /* %eax */ 34 I386_ECX_REGNUM, /* %ecx */ 35 I386_EDX_REGNUM, /* %edx */ 36 I386_EBX_REGNUM, /* %ebx */ 37 I386_ESP_REGNUM, /* %esp */ 38 I386_EBP_REGNUM, /* %ebp */ 39 I386_ESI_REGNUM, /* %esi */ 40 I386_EDI_REGNUM, /* %edi */ 41 I386_EIP_REGNUM, /* %eip */ 42 I386_EFLAGS_REGNUM, /* %eflags */ 43 I386_CS_REGNUM, /* %cs */ 44 I386_SS_REGNUM, /* %ss */ 45 I386_DS_REGNUM, /* %ds */ 46 I386_ES_REGNUM, /* %es */ 47 I386_FS_REGNUM, /* %fs */ 48 I386_GS_REGNUM, /* %gs */ 49 I386_ST0_REGNUM /* %st(0) */ 50 }; 51 52 /* The fill_function for the general-purpose register set. */ 53 54 static void 55 netbsd_i386_fill_gregset (struct regcache *regcache, char *buf) 56 { 57 struct reg *r = (struct reg *) buf; 58 59 #define netbsd_i386_collect_gp(regnum, fld) do { \ 60 collect_register (regcache, regnum, &r->r_##fld); \ 61 } while (0) 62 63 netbsd_i386_collect_gp (I386_EAX_REGNUM, eax); 64 netbsd_i386_collect_gp (I386_EBX_REGNUM, ebx); 65 netbsd_i386_collect_gp (I386_ECX_REGNUM, ecx); 66 netbsd_i386_collect_gp (I386_EDX_REGNUM, edx); 67 netbsd_i386_collect_gp (I386_ESP_REGNUM, esp); 68 netbsd_i386_collect_gp (I386_EBP_REGNUM, ebp); 69 netbsd_i386_collect_gp (I386_ESI_REGNUM, esi); 70 netbsd_i386_collect_gp (I386_EDI_REGNUM, edi); 71 netbsd_i386_collect_gp (I386_EIP_REGNUM, eip); 72 netbsd_i386_collect_gp (I386_EFLAGS_REGNUM, eflags); 73 netbsd_i386_collect_gp (I386_CS_REGNUM, cs); 74 netbsd_i386_collect_gp (I386_SS_REGNUM, ss); 75 netbsd_i386_collect_gp (I386_DS_REGNUM, ds); 76 netbsd_i386_collect_gp (I386_ES_REGNUM, es); 77 netbsd_i386_collect_gp (I386_FS_REGNUM, fs); 78 netbsd_i386_collect_gp (I386_GS_REGNUM, gs); 79 } 80 81 /* The store_function for the general-purpose register set. */ 82 83 static void 84 netbsd_i386_store_gregset (struct regcache *regcache, const char *buf) 85 { 86 struct reg *r = (struct reg *) buf; 87 88 #define netbsd_i386_supply_gp(regnum, fld) do { \ 89 supply_register (regcache, regnum, &r->r_##fld); \ 90 } while(0) 91 92 netbsd_i386_supply_gp (I386_EAX_REGNUM, eax); 93 netbsd_i386_supply_gp (I386_EBX_REGNUM, ebx); 94 netbsd_i386_supply_gp (I386_ECX_REGNUM, ecx); 95 netbsd_i386_supply_gp (I386_EDX_REGNUM, edx); 96 netbsd_i386_supply_gp (I386_ESP_REGNUM, esp); 97 netbsd_i386_supply_gp (I386_EBP_REGNUM, ebp); 98 netbsd_i386_supply_gp (I386_ESI_REGNUM, esi); 99 netbsd_i386_supply_gp (I386_EDI_REGNUM, edi); 100 netbsd_i386_supply_gp (I386_EIP_REGNUM, eip); 101 netbsd_i386_supply_gp (I386_EFLAGS_REGNUM, eflags); 102 netbsd_i386_supply_gp (I386_CS_REGNUM, cs); 103 netbsd_i386_supply_gp (I386_SS_REGNUM, ss); 104 netbsd_i386_supply_gp (I386_DS_REGNUM, ds); 105 netbsd_i386_supply_gp (I386_ES_REGNUM, es); 106 netbsd_i386_supply_gp (I386_FS_REGNUM, fs); 107 netbsd_i386_supply_gp (I386_GS_REGNUM, gs); 108 } 109 110 /* Description of all the x86-netbsd register sets. */ 111 112 static const struct netbsd_regset_info netbsd_target_regsets[] = 113 { 114 /* General Purpose Registers. */ 115 {PT_GETREGS, PT_SETREGS, sizeof (struct reg), 116 netbsd_i386_fill_gregset, netbsd_i386_store_gregset}, 117 /* End of list marker. */ 118 {0, 0, -1, NULL, NULL } 119 }; 120 121 /* NetBSD target op definitions for the amd64 architecture. */ 122 123 class netbsd_i386_target : public netbsd_process_target 124 { 125 public: 126 const netbsd_regset_info *get_regs_info () override; 127 128 void low_arch_setup () override; 129 }; 130 131 const netbsd_regset_info * 132 netbsd_i386_target::get_regs_info () 133 { 134 return netbsd_target_regsets; 135 } 136 137 /* Initialize the target description for the architecture of the 138 inferior. */ 139 140 void 141 netbsd_i386_target::low_arch_setup () 142 { 143 target_desc *tdesc 144 = i386_create_target_description (X86_XSTATE_SSE_MASK, false, false); 145 146 init_target_desc (tdesc, i386_expedite_regs); 147 148 current_process ()->tdesc = tdesc; 149 } 150 151 /* The singleton target ops object. */ 152 153 static netbsd_i386_target the_netbsd_i386_target; 154 155 /* The NetBSD target ops object. */ 156 157 netbsd_process_target *the_netbsd_target = &the_netbsd_i386_target; 158