gdb/gdbserver/linux-x86-tdesc.c

   1 /* GNU/Linux/x86-64 specific target description, for the remote server
   2    for GDB.
   3    Copyright (C) 2017 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 "server.h"
  21 #include "tdesc.h"
  22 #include "linux-x86-tdesc.h"
  23 #include "x86-xstate.h"
  24 #include <inttypes.h>
  25
  26 #if defined __i386__ || !defined IN_PROCESS_AGENT
  27 #include "../features/i386/32bit-core.c"
  28 #include "../features/i386/32bit-linux.c"
  29 #include "../features/i386/32bit-sse.c"
  30 #include "../features/i386/32bit-avx.c"
  31 #include "../features/i386/32bit-avx512.c"
  32 #include "../features/i386/32bit-mpx.c"
  33 #include "../features/i386/32bit-pkeys.c"
  34
  35 /* Defined in auto-generated file i386-linux.c.  */
  36 void init_registers_i386_linux (void);
  37 extern const struct target_desc *tdesc_i386_linux;
  38
  39 /* Defined in auto-generated file i386-mmx-linux.c.  */
  40 void init_registers_i386_mmx_linux (void);
  41 extern const struct target_desc *tdesc_i386_mmx_linux;
  42
  43 /* Defined in auto-generated file i386-avx-linux.c.  */
  44 void init_registers_i386_avx_linux (void);
  45 extern const struct target_desc *tdesc_i386_avx_linux;
  46
  47 /* Defined in auto-generated file i386-avx-mpx-linux.c.  */
  48 void init_registers_i386_avx_mpx_linux (void);
  49 extern const struct target_desc *tdesc_i386_avx_mpx_linux;
  50
  51 /* Defined in auto-generated file i386-avx-avx512-linux.c.  */
  52 void init_registers_i386_avx_avx512_linux (void);
  53 extern const struct target_desc *tdesc_i386_avx_avx512_linux;
  54
  55 /* Defined in auto-generated file i386-avx-mpx-avx512-linux.c.  */
  56 void init_registers_i386_avx_mpx_avx512_pku_linux (void);
  57 extern const struct target_desc *tdesc_i386_avx_mpx_avx512_pku_linux;
  58
  59 /* Defined in auto-generated file i386-mpx-linux.c.  */
  60 void init_registers_i386_mpx_linux (void);
  61 extern const struct target_desc *tdesc_i386_mpx_linux;
  62 #endif
  63
  64 static struct target_desc *i386_tdescs[X86_TDESC_LAST] = { };
  65
  66 void
  67 initialize_low_tdesc ()
  68 {
  69 #if defined __i386__ || !defined IN_PROCESS_AGENT
  70   init_registers_i386_linux ();
  71   init_registers_i386_mmx_linux ();
  72   init_registers_i386_avx_linux ();
  73   init_registers_i386_mpx_linux ();
  74   init_registers_i386_avx_mpx_linux ();
  75   init_registers_i386_avx_avx512_linux ();
  76   init_registers_i386_avx_mpx_avx512_pku_linux ();
  77 #endif
  78 }
  79
  80 #if defined __i386__ || !defined IN_PROCESS_AGENT
  81
  82 /* Return the target description according to XCR0.  */
  83
  84 const struct target_desc *
  85 i386_linux_read_description (uint64_t xcr0)
  86 {
  87   struct target_desc **tdesc = NULL;
  88
  89   if (xcr0 & X86_XSTATE_PKRU)
  90      tdesc = &i386_tdescs[X86_TDESC_AVX_MPX_AVX512_PKU];
  91   else if (xcr0 & X86_XSTATE_AVX512)
  92     tdesc = &i386_tdescs[X86_TDESC_AVX_AVX512];
  93   else if ((xcr0 & X86_XSTATE_AVX_MPX_MASK) == X86_XSTATE_AVX_MPX_MASK)
  94     tdesc = &i386_tdescs[X86_TDESC_AVX_MPX];
  95   else if (xcr0 & X86_XSTATE_MPX)
  96     tdesc = &i386_tdescs[X86_TDESC_MPX];
  97   else if (xcr0 & X86_XSTATE_AVX)
  98     tdesc = &i386_tdescs[X86_TDESC_AVX];
  99   else if (xcr0 & X86_XSTATE_SSE)
 100     tdesc = &i386_tdescs[X86_TDESC_SSE];
 101   else if (xcr0 & X86_XSTATE_X87)
 102     tdesc = &i386_tdescs[X86_TDESC_MMX];
 103
 104   if (tdesc == NULL)
 105     return NULL;
 106
 107   if (*tdesc == NULL)
 108     {
 109       *tdesc = new target_desc ();
 110
 111       long regnum = 0;
 112
 113       if (xcr0 & X86_XSTATE_X87)
 114         regnum = create_feature_i386_32bit_core (*tdesc, regnum);
 115
 116       if (xcr0 & X86_XSTATE_SSE)
 117         regnum = create_feature_i386_32bit_sse (*tdesc, regnum);
 118
 119       regnum = create_feature_i386_32bit_linux (*tdesc, regnum);
 120
 121       if (xcr0 & X86_XSTATE_AVX)
 122         regnum = create_feature_i386_32bit_avx (*tdesc, regnum);
 123
 124       if (xcr0 & X86_XSTATE_MPX)
 125         regnum = create_feature_i386_32bit_mpx (*tdesc, regnum);
 126
 127       if (xcr0 & X86_XSTATE_AVX512)
 128         regnum = create_feature_i386_32bit_avx512 (*tdesc, regnum);
 129
 130       if (xcr0 & X86_XSTATE_PKRU)
 131         regnum = create_feature_i386_32bit_pkeys (*tdesc, regnum);
 132
 133       init_target_desc (*tdesc);
 134
 135 #ifndef IN_PROCESS_AGENT
 136       static const char *expedite_regs_i386[] = { "ebp", "esp", "eip", NULL };
 137       (*tdesc)->expedite_regs = expedite_regs_i386;
 138
 139       if (xcr0 & X86_XSTATE_PKRU)
 140         (*tdesc)->xmltarget = "i386-avx-mpx-avx512-pku-linux.xml";
 141       else if (xcr0 & X86_XSTATE_AVX512)
 142         (*tdesc)->xmltarget = "i386-avx-avx512-linux.xml";
 143       else if ((xcr0 & X86_XSTATE_AVX_MPX_MASK) == X86_XSTATE_AVX_MPX_MASK)
 144         (*tdesc)->xmltarget = "i386-avx-mpx-linux.xml";
 145       else if (xcr0 & X86_XSTATE_MPX)
 146         (*tdesc)->xmltarget = "i386-mpx-linux.xml";
 147       else if (xcr0 & X86_XSTATE_AVX)
 148         (*tdesc)->xmltarget = "i386-avx-linux.xml";
 149       else if (xcr0 & X86_XSTATE_SSE)
 150         (*tdesc)->xmltarget = "i386-linux.xml";
 151       else if (xcr0 & X86_XSTATE_X87)
 152         (*tdesc)->xmltarget = "i386-mmx-linux.xml";
 153       else
 154         internal_error (__FILE__, __LINE__,
 155                         "unknown xcr0: %" PRIu64, xcr0);
 156 #endif
 157     }
 158
 159   return *tdesc;;
 160 }
 161 #endif
 162
 163 #ifndef IN_PROCESS_AGENT
 164 int
 165 i386_get_ipa_tdesc_idx (const struct target_desc *tdesc)
 166 {
 167   for (int i = 0; i < X86_TDESC_LAST; i++)
 168     {
 169       if (tdesc == i386_tdescs[i])
 170         return i;
 171     }
 172
 173   /* If none tdesc is found, return the one with minimum features.  */
 174   return X86_TDESC_MMX;
 175 }
 176
 177 #endif