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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [gdb/] [gdbserver/] [win32-i386-low.c] - Rev 321
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/* Copyright (C) 2007, 2008 Free Software Foundation, Inc. This file is part of GDB. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include "server.h" #include "win32-low.h" #define FCS_REGNUM 27 #define FOP_REGNUM 31 #define FLAG_TRACE_BIT 0x100 static unsigned dr[8]; static int debug_registers_changed = 0; static int debug_registers_used = 0; static void i386_initial_stuff (void) { memset (&dr, 0, sizeof (dr)); debug_registers_changed = 0; debug_registers_used = 0; } static void i386_get_thread_context (win32_thread_info *th, DEBUG_EVENT* current_event) { th->context.ContextFlags = \ CONTEXT_FULL | \ CONTEXT_FLOATING_POINT | \ CONTEXT_EXTENDED_REGISTERS | \ CONTEXT_DEBUG_REGISTERS; GetThreadContext (th->h, &th->context); debug_registers_changed = 0; if (th->tid == current_event->dwThreadId) { /* Copy dr values from the current thread. */ dr[0] = th->context.Dr0; dr[1] = th->context.Dr1; dr[2] = th->context.Dr2; dr[3] = th->context.Dr3; dr[6] = th->context.Dr6; dr[7] = th->context.Dr7; } } static void i386_set_thread_context (win32_thread_info *th, DEBUG_EVENT* current_event) { if (debug_registers_changed) { th->context.Dr0 = dr[0]; th->context.Dr1 = dr[1]; th->context.Dr2 = dr[2]; th->context.Dr3 = dr[3]; /* th->context.Dr6 = dr[6]; FIXME: should we set dr6 also ?? */ th->context.Dr7 = dr[7]; } SetThreadContext (th->h, &th->context); } static void i386_thread_added (win32_thread_info *th) { /* Set the debug registers for the new thread if they are used. */ if (debug_registers_used) { th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS; GetThreadContext (th->h, &th->context); th->context.Dr0 = dr[0]; th->context.Dr1 = dr[1]; th->context.Dr2 = dr[2]; th->context.Dr3 = dr[3]; /* th->context.Dr6 = dr[6]; FIXME: should we set dr6 also ?? */ th->context.Dr7 = dr[7]; SetThreadContext (th->h, &th->context); th->context.ContextFlags = 0; } } static void i386_single_step (win32_thread_info *th) { th->context.EFlags |= FLAG_TRACE_BIT; } /* An array of offset mappings into a Win32 Context structure. This is a one-to-one mapping which is indexed by gdb's register numbers. It retrieves an offset into the context structure where the 4 byte register is located. An offset value of -1 indicates that Win32 does not provide this register in it's CONTEXT structure. In this case regptr will return a pointer into a dummy register. */ #define context_offset(x) ((int)&(((CONTEXT *)NULL)->x)) static const int mappings[] = { context_offset (Eax), context_offset (Ecx), context_offset (Edx), context_offset (Ebx), context_offset (Esp), context_offset (Ebp), context_offset (Esi), context_offset (Edi), context_offset (Eip), context_offset (EFlags), context_offset (SegCs), context_offset (SegSs), context_offset (SegDs), context_offset (SegEs), context_offset (SegFs), context_offset (SegGs), context_offset (FloatSave.RegisterArea[0 * 10]), context_offset (FloatSave.RegisterArea[1 * 10]), context_offset (FloatSave.RegisterArea[2 * 10]), context_offset (FloatSave.RegisterArea[3 * 10]), context_offset (FloatSave.RegisterArea[4 * 10]), context_offset (FloatSave.RegisterArea[5 * 10]), context_offset (FloatSave.RegisterArea[6 * 10]), context_offset (FloatSave.RegisterArea[7 * 10]), context_offset (FloatSave.ControlWord), context_offset (FloatSave.StatusWord), context_offset (FloatSave.TagWord), context_offset (FloatSave.ErrorSelector), context_offset (FloatSave.ErrorOffset), context_offset (FloatSave.DataSelector), context_offset (FloatSave.DataOffset), context_offset (FloatSave.ErrorSelector), /* XMM0-7 */ context_offset (ExtendedRegisters[10 * 16]), context_offset (ExtendedRegisters[11 * 16]), context_offset (ExtendedRegisters[12 * 16]), context_offset (ExtendedRegisters[13 * 16]), context_offset (ExtendedRegisters[14 * 16]), context_offset (ExtendedRegisters[15 * 16]), context_offset (ExtendedRegisters[16 * 16]), context_offset (ExtendedRegisters[17 * 16]), /* MXCSR */ context_offset (ExtendedRegisters[24]) }; #undef context_offset /* Fetch register from gdbserver regcache data. */ static void i386_fetch_inferior_register (win32_thread_info *th, int r) { char *context_offset = (char *) &th->context + mappings[r]; long l; if (r == FCS_REGNUM) { l = *((long *) context_offset) & 0xffff; supply_register (r, (char *) &l); } else if (r == FOP_REGNUM) { l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1); supply_register (r, (char *) &l); } else supply_register (r, context_offset); } /* Store a new register value into the thread context of TH. */ static void i386_store_inferior_register (win32_thread_info *th, int r) { char *context_offset = (char *) &th->context + mappings[r]; collect_register (r, context_offset); } struct win32_target_ops the_low_target = { sizeof (mappings) / sizeof (mappings[0]), i386_initial_stuff, i386_get_thread_context, i386_set_thread_context, i386_thread_added, i386_fetch_inferior_register, i386_store_inferior_register, i386_single_step, NULL, /* breakpoint */ 0, /* breakpoint_len */ "i386" /* arch_string */ };
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