gdb/gdbserver/linux-amd64-ipa.c

   1 /* GNU/Linux/x86-64 specific low level interface, for the in-process
   2    agent library for GDB.
   3
   4    Copyright (C) 2010 Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #include "server.h"
  22
  23 /* Defined in auto-generated file amd64-linux.c.  */
  24 void init_registers_amd64_linux (void);
  25
  26 /* fast tracepoints collect registers.  */
  27
  28 #define FT_CR_RIP 0
  29 #define FT_CR_EFLAGS 1
  30 #define FT_CR_R8 2
  31 #define FT_CR_R9 3
  32 #define FT_CR_R10 4
  33 #define FT_CR_R11 5
  34 #define FT_CR_R12 6
  35 #define FT_CR_R13 7
  36 #define FT_CR_R14 8
  37 #define FT_CR_R15 9
  38 #define FT_CR_RAX 10
  39 #define FT_CR_RBX 11
  40 #define FT_CR_RCX 12
  41 #define FT_CR_RDX 13
  42 #define FT_CR_RSI 14
  43 #define FT_CR_RDI 15
  44 #define FT_CR_RBP 16
  45 #define FT_CR_RSP 17
  46
  47 static const int x86_64_ft_collect_regmap[] = {
  48   FT_CR_RAX * 8, FT_CR_RBX * 8, FT_CR_RCX * 8, FT_CR_RDX * 8,
  49   FT_CR_RSI * 8, FT_CR_RDI * 8, FT_CR_RBP * 8, FT_CR_RSP * 8,
  50   FT_CR_R8 * 8,  FT_CR_R9 * 8,  FT_CR_R10 * 8, FT_CR_R11 * 8,
  51   FT_CR_R12 * 8, FT_CR_R13 * 8, FT_CR_R14 * 8, FT_CR_R15 * 8,
  52   FT_CR_RIP * 8, FT_CR_EFLAGS * 8
  53 };
  54
  55 #define X86_64_NUM_FT_COLLECT_GREGS \
  56   (sizeof (x86_64_ft_collect_regmap) / sizeof(x86_64_ft_collect_regmap[0]))
  57
  58 void
  59 supply_fast_tracepoint_registers (struct regcache *regcache,
  60                                   const unsigned char *buf)
  61 {
  62   int i;
  63
  64   for (i = 0; i < X86_64_NUM_FT_COLLECT_GREGS; i++)
  65     supply_register (regcache, i,
  66                      ((char *) buf) + x86_64_ft_collect_regmap[i]);
  67 }
  68
  69 ULONGEST __attribute__ ((visibility("default"), used))
  70 gdb_agent_get_raw_reg (const unsigned char *raw_regs, int regnum)
  71 {
  72   if (regnum > X86_64_NUM_FT_COLLECT_GREGS)
  73     return 0;
  74
  75   return *(ULONGEST *) (raw_regs + x86_64_ft_collect_regmap[regnum]);
  76 }
  77
  78 /* This is only needed because reg-i386-linux-lib.o references it.  We
  79    may use it proper at some point.  */
  80 const char *gdbserver_xmltarget;
  81
  82 void
  83 initialize_low_tracepoint (void)
  84 {
  85   init_registers_amd64_linux ();
  86 }