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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.1/] [gdb/] [gdbserver/] [win32-i386-low.c] - Rev 280
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/* Copyright (C) 2007, 2008, 2009, 2010 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" #include "i386-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 struct i386_debug_reg_state debug_reg_state; static int debug_registers_changed = 0; static int debug_registers_used = 0; /* Update the inferior's debug register REGNUM from STATE. */ void i386_dr_low_set_addr (const struct i386_debug_reg_state *state, int regnum) { if (! (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR)) fatal ("Invalid debug register %d", regnum); /* debug_reg_state.dr_mirror is already set. Just notify i386_set_thread_context, i386_thread_added that the registers need to be updated. */ debug_registers_changed = 1; debug_registers_used = 1; } /* Update the inferior's DR7 debug control register from STATE. */ void i386_dr_low_set_control (const struct i386_debug_reg_state *state) { /* debug_reg_state.dr_control_mirror is already set. Just notify i386_set_thread_context, i386_thread_added that the registers need to be updated. */ debug_registers_changed = 1; debug_registers_used = 1; } /* Get the value of the DR6 debug status register from the inferior and record it in STATE. */ void i386_dr_low_get_status (struct i386_debug_reg_state *state) { /* We don't need to do anything here, the last call to thread_rec for current_event.dwThreadId id has already set it. */ } /* Watchpoint support. */ static int i386_insert_point (char type, CORE_ADDR addr, int len) { switch (type) { case '2': case '3': case '4': return i386_low_insert_watchpoint (&debug_reg_state, type, addr, len); default: /* Unsupported. */ return 1; } } static int i386_remove_point (char type, CORE_ADDR addr, int len) { switch (type) { case '2': case '3': case '4': return i386_low_remove_watchpoint (&debug_reg_state, type, addr, len); default: /* Unsupported. */ return 1; } } static int i386_stopped_by_watchpoint (void) { return i386_low_stopped_by_watchpoint (&debug_reg_state); } static CORE_ADDR i386_stopped_data_address (void) { CORE_ADDR addr; if (i386_low_stopped_data_address (&debug_reg_state, &addr)) return addr; return 0; } static void i386_initial_stuff (void) { i386_low_init_dregs (&debug_reg_state); debug_registers_changed = 0; debug_registers_used = 0; } static void i386_get_thread_context (win32_thread_info *th, DEBUG_EVENT* current_event) { /* Requesting the CONTEXT_EXTENDED_REGISTERS register set fails if the system doesn't support extended registers. */ static DWORD extended_registers = CONTEXT_EXTENDED_REGISTERS; again: th->context.ContextFlags = (CONTEXT_FULL | CONTEXT_FLOATING_POINT | CONTEXT_DEBUG_REGISTERS | extended_registers); if (!GetThreadContext (th->h, &th->context)) { DWORD e = GetLastError (); if (extended_registers && e == ERROR_INVALID_PARAMETER) { extended_registers = 0; goto again; } error ("GetThreadContext failure %ld\n", (long) e); } debug_registers_changed = 0; if (th->tid == current_event->dwThreadId) { /* Copy dr values from the current thread. */ struct i386_debug_reg_state *dr = &debug_reg_state; dr->dr_mirror[0] = th->context.Dr0; dr->dr_mirror[1] = th->context.Dr1; dr->dr_mirror[2] = th->context.Dr2; dr->dr_mirror[3] = th->context.Dr3; dr->dr_status_mirror = th->context.Dr6; dr->dr_control_mirror = th->context.Dr7; } } static void i386_set_thread_context (win32_thread_info *th, DEBUG_EVENT* current_event) { if (debug_registers_changed) { struct i386_debug_reg_state *dr = &debug_reg_state; th->context.Dr0 = dr->dr_mirror[0]; th->context.Dr1 = dr->dr_mirror[1]; th->context.Dr2 = dr->dr_mirror[2]; th->context.Dr3 = dr->dr_mirror[3]; /* th->context.Dr6 = dr->dr_status_mirror; FIXME: should we set dr6 also ?? */ th->context.Dr7 = dr->dr_control_mirror; } 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) { struct i386_debug_reg_state *dr = &debug_reg_state; th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS; GetThreadContext (th->h, &th->context); th->context.Dr0 = dr->dr_mirror[0]; th->context.Dr1 = dr->dr_mirror[1]; th->context.Dr2 = dr->dr_mirror[2]; th->context.Dr3 = dr->dr_mirror[3]; /* th->context.Dr6 = dr->dr_status_mirror; FIXME: should we set dr6 also ?? */ th->context.Dr7 = dr->dr_control_mirror; 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 (struct regcache *regcache, 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 (regcache, r, (char *) &l); } else if (r == FOP_REGNUM) { l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1); supply_register (regcache, r, (char *) &l); } else supply_register (regcache, r, context_offset); } /* Store a new register value into the thread context of TH. */ static void i386_store_inferior_register (struct regcache *regcache, win32_thread_info *th, int r) { char *context_offset = (char *) &th->context + mappings[r]; collect_register (regcache, r, context_offset); } static const unsigned char i386_win32_breakpoint = 0xcc; #define i386_win32_breakpoint_len 1 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, &i386_win32_breakpoint, i386_win32_breakpoint_len, i386_insert_point, i386_remove_point, i386_stopped_by_watchpoint, i386_stopped_data_address };
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