| /* 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 |
| |
| /* Defined in auto-generated file reg-i386.c. */ |
| void init_registers_i386 (void); |
| |
| 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 = { |
| init_registers_i386, |
| 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 */ |
| }; |