gdbserver/netbsd-i386-low.cc

   1 /* Copyright (C) 2020-2021 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;