gdb/config/i386/nm-go32.h

   1 /* Native definitions for Intel x86 running DJGPP.
   2    Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #define NO_PTRACE_H
  22
  23 #include "i386/nm-i386v.h"
  24
  25 #define TARGET_HAS_HARDWARE_WATCHPOINTS
  26
  27 /* Returns the number of hardware watchpoints of type TYPE that we can
  28    set.  Value is positive if we can set CNT watchpoints, zero if
  29    setting watchpoints of type TYPE is not supported, and negative if
  30    CNT is more than the maximum number of watchpoints of type TYPE
  31    that we can support.  TYPE is one of bp_hardware_watchpoint,
  32    bp_read_watchpoint, bp_write_watchpoint, or bp_hardware_breakpoint.
  33    CNT is the number of such watchpoints used so far (including this
  34    one).  OTHERTYPE is non-zero if other types of watchpoints are
  35    currently enabled.
  36
  37    We always return 1 here because we don't have enough information
  38    about possible overlap of addresses that they want to watch.  As
  39    an extreme example, consider the case where all the watchpoints
  40    watch the same address and the same region length: then we can
  41    handle a virtually unlimited number of watchpoints, due to debug
  42    register sharing implemented via reference counts in go32-nat.c.  */
  43
  44 #define TARGET_CAN_USE_HARDWARE_WATCHPOINT(type, cnt, ot) 1
  45
  46 /* Returns non-zero if we can use hardware watchpoints to watch a region
  47    whose address is ADDR and whose length is LEN.  */
  48
  49 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(addr,len) \
  50         go32_region_ok_for_watchpoint(addr,len)
  51
  52 /* After a watchpoint trap, the PC points to the instruction after the
  53    one that caused the trap.  Therefore we don't need to step over it.
  54    But we do need to reset the status register to avoid another trap.  */
  55
  56 #define HAVE_CONTINUABLE_WATCHPOINT
  57
  58 #define STOPPED_BY_WATCHPOINT(W)  \
  59   go32_stopped_by_watchpoint (inferior_pid, 0)
  60
  61 #define target_stopped_data_address() \
  62   go32_stopped_by_watchpoint (inferior_pid, 1)
  63
  64 /* Use these macros for watchpoint insertion/removal.  */
  65
  66 #define target_insert_watchpoint(addr, len, type)  \
  67   go32_insert_watchpoint (inferior_pid, addr, len, type)
  68
  69 #define target_remove_watchpoint(addr, len, type)  \
  70   go32_remove_watchpoint (inferior_pid, addr, len, type)
  71
  72 #define target_insert_hw_breakpoint(addr, shadow)  \
  73   go32_insert_hw_breakpoint(addr, shadow)
  74
  75 #define target_remove_hw_breakpoint(addr, shadow)  \
  76   go32_remove_hw_breakpoint(addr, shadow)
  77
  78 #define DECR_PC_AFTER_HW_BREAK 0
  79
  80 #undef FLOAT_INFO
  81 #define FLOAT_INFO { i386_go32_float_info (); }
  82
  83 extern void i386_go32_float_info (void);