| /* 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" |
| |
| #ifndef CONTEXT_EXTENDED_REGISTERS |
| #define CONTEXT_EXTENDED_REGISTERS 0 |
| #endif |
| |
| #define FCS_REGNUM 27 |
| #define FOP_REGNUM 31 |
| |
| #define FLAG_TRACE_BIT 0x100 |
| |
| #ifdef __x86_64__ |
| /* Defined in auto-generated file reg-amd64.c. */ |
| void init_registers_amd64 (void); |
| #else |
| /* Defined in auto-generated file reg-i386.c. */ |
| void init_registers_i386 (void); |
| #endif |
| |
| 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; |
| } |
| |
| #ifndef __x86_64__ |
| |
| /* 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 |
| |
| #else /* __x86_64__ */ |
| |
| #define context_offset(x) (offsetof (CONTEXT, x)) |
| static const int mappings[] = |
| { |
| context_offset (Rax), |
| context_offset (Rbx), |
| context_offset (Rcx), |
| context_offset (Rdx), |
| context_offset (Rsi), |
| context_offset (Rdi), |
| context_offset (Rbp), |
| context_offset (Rsp), |
| context_offset (R8), |
| context_offset (R9), |
| context_offset (R10), |
| context_offset (R11), |
| context_offset (R12), |
| context_offset (R13), |
| context_offset (R14), |
| context_offset (R15), |
| context_offset (Rip), |
| context_offset (EFlags), |
| context_offset (SegCs), |
| context_offset (SegSs), |
| context_offset (SegDs), |
| context_offset (SegEs), |
| context_offset (SegFs), |
| context_offset (SegGs), |
| context_offset (FloatSave.FloatRegisters[0]), |
| context_offset (FloatSave.FloatRegisters[1]), |
| context_offset (FloatSave.FloatRegisters[2]), |
| context_offset (FloatSave.FloatRegisters[3]), |
| context_offset (FloatSave.FloatRegisters[4]), |
| context_offset (FloatSave.FloatRegisters[5]), |
| context_offset (FloatSave.FloatRegisters[6]), |
| context_offset (FloatSave.FloatRegisters[7]), |
| 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 (Xmm0), |
| context_offset (Xmm1), |
| context_offset (Xmm2), |
| context_offset (Xmm3), |
| context_offset (Xmm4), |
| context_offset (Xmm5), |
| context_offset (Xmm6), |
| context_offset (Xmm7), |
| context_offset (Xmm8), |
| context_offset (Xmm9), |
| context_offset (Xmm10), |
| context_offset (Xmm11), |
| context_offset (Xmm12), |
| context_offset (Xmm13), |
| context_offset (Xmm14), |
| context_offset (Xmm15), |
| /* MXCSR */ |
| context_offset (FloatSave.MxCsr) |
| }; |
| #undef context_offset |
| |
| #endif /* __x86_64__ */ |
| |
| /* 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 |
| |
| static void |
| init_windows_x86 (void) |
| { |
| #ifdef __x86_64__ |
| init_registers_amd64 (); |
| #else |
| init_registers_i386 (); |
| #endif |
| } |
| |
| struct win32_target_ops the_low_target = { |
| init_windows_x86, |
| 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 |
| }; |