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
  25 #if defined __i386__ || !defined IN_PROCESS_AGENT
  26 #include "../features/i386/32bit-core.c"
  27 #include "../features/i386/32bit-linux.c"
  28 #include "../features/i386/32bit-sse.c"
  29 #include "../features/i386/32bit-avx.c"
  30 #include "../features/i386/32bit-avx512.c"
  31 #include "../features/i386/32bit-mpx.c"
  32 #include "../features/i386/32bit-pkeys.c"
  33
  34 /* Defined in auto-generated file i386-linux.c.  */
  35 void init_registers_i386_linux (void);
  36 extern const struct target_desc *tdesc_i386_linux;
  37
  38 /* Defined in auto-generated file i386-mmx-linux.c.  */
  39 void init_registers_i386_mmx_linux (void);
  40 extern const struct target_desc *tdesc_i386_mmx_linux;
  41
  42 /* Defined in auto-generated file i386-avx-linux.c.  */
  43 void init_registers_i386_avx_linux (void);
  44 extern const struct target_desc *tdesc_i386_avx_linux;
  45
  46 /* Defined in auto-generated file i386-avx-mpx-linux.c.  */
  47 void init_registers_i386_avx_mpx_linux (void);
  48 extern const struct target_desc *tdesc_i386_avx_mpx_linux;
  49
  50 /* Defined in auto-generated file i386-avx-avx512-linux.c.  */
  51 void init_registers_i386_avx_avx512_linux (void);
  52 extern const struct target_desc *tdesc_i386_avx_avx512_linux;
  53
  54 /* Defined in auto-generated file i386-avx-mpx-avx512-linux.c.  */
  55 void init_registers_i386_avx_mpx_avx512_pku_linux (void);
  56 extern const struct target_desc *tdesc_i386_avx_mpx_avx512_pku_linux;
  57
  58 /* Defined in auto-generated file i386-mpx-linux.c.  */
  59 void init_registers_i386_mpx_linux (void);
  60 extern const struct target_desc *tdesc_i386_mpx_linux;
  61 #endif
  62
  63 static struct target_desc *i386_tdescs[X86_TDESC_LAST] = { };
  64
  65 #if defined GDB_SELF_TEST && !defined IN_PROCESS_AGENT
  66 #include "selftest.h"
  67
  68 namespace selftests {
  69 namespace tdesc {
  70 static void
  71 i386_tdesc_test ()
  72 {
  73   struct
  74   {
  75     unsigned int mask;
  76     const target_desc *tdesc;
  77   } tdesc_tests[] = {
  78     { X86_XSTATE_X87, tdesc_i386_mmx_linux },
  79     { X86_XSTATE_SSE_MASK, tdesc_i386_linux },
  80     { X86_XSTATE_AVX_MASK, tdesc_i386_avx_linux },
  81     { X86_XSTATE_MPX_MASK, tdesc_i386_mpx_linux },
  82     { X86_XSTATE_AVX_MPX_MASK, tdesc_i386_avx_mpx_linux },
  83     { X86_XSTATE_AVX_AVX512_MASK, tdesc_i386_avx_avx512_linux },
  84     { X86_XSTATE_AVX_MPX_AVX512_PKU_MASK, tdesc_i386_avx_mpx_avx512_pku_linux }
  85   };
  86
  87   for (auto &elem : tdesc_tests)
  88     {
  89       const target_desc *tdesc = i386_linux_read_description (elem.mask);
  90
  91       SELF_CHECK (*tdesc == *elem.tdesc);
  92     }
  93 }
  94 }
  95 } // namespace selftests
  96 #endif /* GDB_SELF_TEST */
  97
  98 void
  99 initialize_low_tdesc ()
 100 {
 101 #if defined __i386__ || !defined IN_PROCESS_AGENT
 102   init_registers_i386_linux ();
 103   init_registers_i386_mmx_linux ();
 104   init_registers_i386_avx_linux ();
 105   init_registers_i386_mpx_linux ();
 106   init_registers_i386_avx_mpx_linux ();
 107   init_registers_i386_avx_avx512_linux ();
 108   init_registers_i386_avx_mpx_avx512_pku_linux ();
 109
 110 #if GDB_SELF_TEST && !defined IN_PROCESS_AGENT
 111   selftests::register_test (selftests::tdesc::i386_tdesc_test);
 112 #endif
 113 #endif
 114 }
 115
 116 #if defined __i386__ || !defined IN_PROCESS_AGENT
 117
 118 /* Return the target description according to XCR0.  */
 119
 120 const struct target_desc *
 121 i386_linux_read_description (uint64_t xcr0)
 122 {
 123   struct target_desc **tdesc = NULL;
 124
 125   if (xcr0 & X86_XSTATE_PKRU)
 126      tdesc = &i386_tdescs[X86_TDESC_AVX_MPX_AVX512_PKU];
 127   else if (xcr0 & X86_XSTATE_AVX512)
 128     tdesc = &i386_tdescs[X86_TDESC_AVX_AVX512];
 129   else if ((xcr0 & X86_XSTATE_AVX_MPX_MASK) == X86_XSTATE_AVX_MPX_MASK)
 130     tdesc = &i386_tdescs[X86_TDESC_AVX_MPX];
 131   else if (xcr0 & X86_XSTATE_MPX)
 132     tdesc = &i386_tdescs[X86_TDESC_MPX];
 133   else if (xcr0 & X86_XSTATE_AVX)
 134     tdesc = &i386_tdescs[X86_TDESC_AVX];
 135   else if (xcr0 & X86_XSTATE_SSE)
 136     tdesc = &i386_tdescs[X86_TDESC_SSE];
 137   else if (xcr0 & X86_XSTATE_X87)
 138     tdesc = &i386_tdescs[X86_TDESC_MMX];
 139
 140   if (tdesc == NULL)
 141     return NULL;
 142
 143   if (*tdesc == NULL)
 144     {
 145       *tdesc = new target_desc ();
 146
 147 #ifndef IN_PROCESS_AGENT
 148       set_tdesc_architecture (*tdesc, "i386");
 149       set_tdesc_osabi (*tdesc, "GNU/Linux");
 150 #endif
 151
 152       long regnum = 0;
 153
 154       if (xcr0 & X86_XSTATE_X87)
 155         regnum = create_feature_i386_32bit_core (*tdesc, regnum);
 156
 157       if (xcr0 & X86_XSTATE_SSE)
 158         regnum = create_feature_i386_32bit_sse (*tdesc, regnum);
 159
 160       regnum = create_feature_i386_32bit_linux (*tdesc, regnum);
 161
 162       if (xcr0 & X86_XSTATE_AVX)
 163         regnum = create_feature_i386_32bit_avx (*tdesc, regnum);
 164
 165       if (xcr0 & X86_XSTATE_MPX)
 166         regnum = create_feature_i386_32bit_mpx (*tdesc, regnum);
 167
 168       if (xcr0 & X86_XSTATE_AVX512)
 169         regnum = create_feature_i386_32bit_avx512 (*tdesc, regnum);
 170
 171       if (xcr0 & X86_XSTATE_PKRU)
 172         regnum = create_feature_i386_32bit_pkeys (*tdesc, regnum);
 173
 174       init_target_desc (*tdesc);
 175
 176 #ifndef IN_PROCESS_AGENT
 177       static const char *expedite_regs_i386[] = { "ebp", "esp", "eip", NULL };
 178       (*tdesc)->expedite_regs = expedite_regs_i386;
 179 #endif
 180     }
 181
 182   return *tdesc;;
 183 }
 184 #endif
 185
 186 #ifndef IN_PROCESS_AGENT
 187 int
 188 i386_get_ipa_tdesc_idx (const struct target_desc *tdesc)
 189 {
 190   for (int i = 0; i < X86_TDESC_LAST; i++)
 191     {
 192       if (tdesc == i386_tdescs[i])
 193         return i;
 194     }
 195
 196   /* If none tdesc is found, return the one with minimum features.  */
 197   return X86_TDESC_MMX;
 198 }
 199
 200 #endif