gdbserver/netbsd-amd64-low.cc

   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/amd64.h"
  25 #include "x86-tdesc.h"
  26 #include "tdesc.h"
  27
  28 /* The index of various registers inside the regcache.  */
  29
  30 enum netbsd_x86_64_gdb_regnum
  31 {
  32   AMD64_RAX_REGNUM,          /* %rax */
  33   AMD64_RBX_REGNUM,          /* %rbx */
  34   AMD64_RCX_REGNUM,          /* %rcx */
  35   AMD64_RDX_REGNUM,          /* %rdx */
  36   AMD64_RSI_REGNUM,          /* %rsi */
  37   AMD64_RDI_REGNUM,          /* %rdi */
  38   AMD64_RBP_REGNUM,          /* %rbp */
  39   AMD64_RSP_REGNUM,          /* %rsp */
  40   AMD64_R8_REGNUM,            /* %r8 */
  41   AMD64_R9_REGNUM,            /* %r9 */
  42   AMD64_R10_REGNUM,          /* %r10 */
  43   AMD64_R11_REGNUM,          /* %r11 */
  44   AMD64_R12_REGNUM,          /* %r12 */
  45   AMD64_R13_REGNUM,          /* %r13 */
  46   AMD64_R14_REGNUM,          /* %r14 */
  47   AMD64_R15_REGNUM,          /* %r15 */
  48   AMD64_RIP_REGNUM,          /* %rip */
  49   AMD64_EFLAGS_REGNUM,    /* %eflags */
  50   AMD64_CS_REGNUM,            /* %cs */
  51   AMD64_SS_REGNUM,            /* %ss */
  52   AMD64_DS_REGNUM,            /* %ds */
  53   AMD64_ES_REGNUM,            /* %es */
  54   AMD64_FS_REGNUM,            /* %fs */
  55   AMD64_GS_REGNUM,            /* %gs */
  56   AMD64_ST0_REGNUM = 24,     /* %st0 */
  57   AMD64_ST1_REGNUM,          /* %st1 */
  58   AMD64_FCTRL_REGNUM = AMD64_ST0_REGNUM + 8,
  59   AMD64_FSTAT_REGNUM = AMD64_ST0_REGNUM + 9,
  60   AMD64_FTAG_REGNUM = AMD64_ST0_REGNUM + 10,
  61   AMD64_XMM0_REGNUM = 40,   /* %xmm0 */
  62   AMD64_XMM1_REGNUM,        /* %xmm1 */
  63   AMD64_MXCSR_REGNUM = AMD64_XMM0_REGNUM + 16,
  64   AMD64_YMM0H_REGNUM,      /* %ymm0h */
  65   AMD64_YMM15H_REGNUM = AMD64_YMM0H_REGNUM + 15,
  66   AMD64_BND0R_REGNUM = AMD64_YMM15H_REGNUM + 1,
  67   AMD64_BND3R_REGNUM = AMD64_BND0R_REGNUM + 3,
  68   AMD64_BNDCFGU_REGNUM,
  69   AMD64_BNDSTATUS_REGNUM,
  70   AMD64_XMM16_REGNUM,
  71   AMD64_XMM31_REGNUM = AMD64_XMM16_REGNUM + 15,
  72   AMD64_YMM16H_REGNUM,
  73   AMD64_YMM31H_REGNUM = AMD64_YMM16H_REGNUM + 15,
  74   AMD64_K0_REGNUM,
  75   AMD64_K7_REGNUM = AMD64_K0_REGNUM + 7,
  76   AMD64_ZMM0H_REGNUM,
  77   AMD64_ZMM31H_REGNUM = AMD64_ZMM0H_REGNUM + 31,
  78   AMD64_PKRU_REGNUM,
  79   AMD64_FSBASE_REGNUM,
  80   AMD64_GSBASE_REGNUM
  81 };
  82
  83 /* The fill_function for the general-purpose register set.  */
  84
  85 static void
  86 netbsd_x86_64_fill_gregset (struct regcache *regcache, char *buf)
  87 {
  88   struct reg *r = (struct reg *) buf;
  89
  90 #define netbsd_x86_64_collect_gp(regnum, fld) do {              \
  91     collect_register (regcache, regnum, &r->regs[_REG_##fld]);  \
  92   } while (0)
  93
  94   netbsd_x86_64_collect_gp (AMD64_RAX_REGNUM, RAX);
  95   netbsd_x86_64_collect_gp (AMD64_RBX_REGNUM, RBX);
  96   netbsd_x86_64_collect_gp (AMD64_RCX_REGNUM, RCX);
  97   netbsd_x86_64_collect_gp (AMD64_RDX_REGNUM, RDX);
  98   netbsd_x86_64_collect_gp (AMD64_RSI_REGNUM, RSI);
  99   netbsd_x86_64_collect_gp (AMD64_RDI_REGNUM, RDI);
 100   netbsd_x86_64_collect_gp (AMD64_RBP_REGNUM, RBP);
 101   netbsd_x86_64_collect_gp (AMD64_RSP_REGNUM, RSP);
 102   netbsd_x86_64_collect_gp (AMD64_R8_REGNUM, R8);
 103   netbsd_x86_64_collect_gp (AMD64_R9_REGNUM, R9);
 104   netbsd_x86_64_collect_gp (AMD64_R10_REGNUM, R10);
 105   netbsd_x86_64_collect_gp (AMD64_R11_REGNUM, R11);
 106   netbsd_x86_64_collect_gp (AMD64_R12_REGNUM, R12);
 107   netbsd_x86_64_collect_gp (AMD64_R13_REGNUM, R13);
 108   netbsd_x86_64_collect_gp (AMD64_R14_REGNUM, R14);
 109   netbsd_x86_64_collect_gp (AMD64_R15_REGNUM, R15);
 110   netbsd_x86_64_collect_gp (AMD64_RIP_REGNUM, RIP);
 111   netbsd_x86_64_collect_gp (AMD64_EFLAGS_REGNUM, RFLAGS);
 112   netbsd_x86_64_collect_gp (AMD64_CS_REGNUM, CS);
 113   netbsd_x86_64_collect_gp (AMD64_SS_REGNUM, SS);
 114   netbsd_x86_64_collect_gp (AMD64_DS_REGNUM, DS);
 115   netbsd_x86_64_collect_gp (AMD64_ES_REGNUM, ES);
 116   netbsd_x86_64_collect_gp (AMD64_FS_REGNUM, FS);
 117   netbsd_x86_64_collect_gp (AMD64_GS_REGNUM, GS);
 118 }
 119
 120 /* The store_function for the general-purpose register set.  */
 121
 122 static void
 123 netbsd_x86_64_store_gregset (struct regcache *regcache, const char *buf)
 124 {
 125   struct reg *r = (struct reg *) buf;
 126
 127 #define netbsd_x86_64_supply_gp(regnum, fld) do {               \
 128     supply_register (regcache, regnum, &r->regs[_REG_##fld]);   \
 129   } while(0)
 130
 131   netbsd_x86_64_supply_gp (AMD64_RAX_REGNUM, RAX);
 132   netbsd_x86_64_supply_gp (AMD64_RBX_REGNUM, RBX);
 133   netbsd_x86_64_supply_gp (AMD64_RCX_REGNUM, RCX);
 134   netbsd_x86_64_supply_gp (AMD64_RDX_REGNUM, RDX);
 135   netbsd_x86_64_supply_gp (AMD64_RSI_REGNUM, RSI);
 136   netbsd_x86_64_supply_gp (AMD64_RDI_REGNUM, RDI);
 137   netbsd_x86_64_supply_gp (AMD64_RBP_REGNUM, RBP);
 138   netbsd_x86_64_supply_gp (AMD64_RSP_REGNUM, RSP);
 139   netbsd_x86_64_supply_gp (AMD64_R8_REGNUM, R8);
 140   netbsd_x86_64_supply_gp (AMD64_R9_REGNUM, R9);
 141   netbsd_x86_64_supply_gp (AMD64_R10_REGNUM, R10);
 142   netbsd_x86_64_supply_gp (AMD64_R11_REGNUM, R11);
 143   netbsd_x86_64_supply_gp (AMD64_R12_REGNUM, R12);
 144   netbsd_x86_64_supply_gp (AMD64_R13_REGNUM, R13);
 145   netbsd_x86_64_supply_gp (AMD64_R14_REGNUM, R14);
 146   netbsd_x86_64_supply_gp (AMD64_R15_REGNUM, R15);
 147   netbsd_x86_64_supply_gp (AMD64_RIP_REGNUM, RIP);
 148   netbsd_x86_64_supply_gp (AMD64_EFLAGS_REGNUM, RFLAGS);
 149   netbsd_x86_64_supply_gp (AMD64_CS_REGNUM, CS);
 150   netbsd_x86_64_supply_gp (AMD64_SS_REGNUM, SS);
 151   netbsd_x86_64_supply_gp (AMD64_DS_REGNUM, DS);
 152   netbsd_x86_64_supply_gp (AMD64_ES_REGNUM, ES);
 153   netbsd_x86_64_supply_gp (AMD64_FS_REGNUM, FS);
 154   netbsd_x86_64_supply_gp (AMD64_GS_REGNUM, GS);
 155 }
 156
 157 /* Description of all the x86-netbsd register sets.  */
 158
 159 static const struct netbsd_regset_info netbsd_target_regsets[] =
 160 {
 161   /* General Purpose Registers.  */
 162   {PT_GETREGS, PT_SETREGS, sizeof (struct reg),
 163    netbsd_x86_64_fill_gregset, netbsd_x86_64_store_gregset},
 164   /* End of list marker.  */
 165   {0, 0, -1, NULL, NULL }
 166 };
 167
 168 /* NetBSD target op definitions for the amd64 architecture.  */
 169
 170 class netbsd_amd64_target : public netbsd_process_target
 171 {
 172 protected:
 173   const netbsd_regset_info *get_regs_info () override;
 174
 175   void low_arch_setup () override;
 176 };
 177
 178 /* Return the information to access registers.  */
 179
 180 const netbsd_regset_info *
 181 netbsd_amd64_target::get_regs_info ()
 182 {
 183   return netbsd_target_regsets;
 184 }
 185
 186 /* Architecture-specific setup for the current process.  */
 187
 188 void
 189 netbsd_amd64_target::low_arch_setup ()
 190 {
 191   target_desc *tdesc
 192     = amd64_create_target_description (X86_XSTATE_SSE_MASK, false, false, false);
 193
 194   init_target_desc (tdesc, amd64_expedite_regs);
 195
 196   current_process ()->tdesc = tdesc;
 197 }
 198
 199 /* The singleton target ops object.  */
 200
 201 static netbsd_amd64_target the_netbsd_amd64_target;
 202
 203 /* The NetBSD target ops object.  */
 204
 205 netbsd_process_target *the_netbsd_target = &the_netbsd_amd64_target;