477 lines
12 KiB
C
477 lines
12 KiB
C
/* Copyright (C) 2007-2016 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 "x86-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);
|
|
extern const struct target_desc *tdesc_amd64;
|
|
#else
|
|
/* Defined in auto-generated file reg-i386.c. */
|
|
void init_registers_i386 (void);
|
|
extern const struct target_desc *tdesc_i386;
|
|
#endif
|
|
|
|
static struct x86_debug_reg_state debug_reg_state;
|
|
|
|
static int
|
|
update_debug_registers_callback (struct inferior_list_entry *entry,
|
|
void *pid_p)
|
|
{
|
|
struct thread_info *thr = (struct thread_info *) entry;
|
|
win32_thread_info *th = (win32_thread_info *) inferior_target_data (thr);
|
|
int pid = *(int *) pid_p;
|
|
|
|
/* Only update the threads of this process. */
|
|
if (pid_of (thr) == pid)
|
|
{
|
|
/* The actual update is done later just before resuming the lwp,
|
|
we just mark that the registers need updating. */
|
|
th->debug_registers_changed = 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Update the inferior's debug register REGNUM from STATE. */
|
|
|
|
static void
|
|
x86_dr_low_set_addr (int regnum, CORE_ADDR addr)
|
|
{
|
|
/* Only update the threads of this process. */
|
|
int pid = pid_of (current_thread);
|
|
|
|
gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);
|
|
|
|
find_inferior (&all_threads, update_debug_registers_callback, &pid);
|
|
}
|
|
|
|
/* Update the inferior's DR7 debug control register from STATE. */
|
|
|
|
static void
|
|
x86_dr_low_set_control (unsigned long control)
|
|
{
|
|
/* Only update the threads of this process. */
|
|
int pid = pid_of (current_thread);
|
|
|
|
find_inferior (&all_threads, update_debug_registers_callback, &pid);
|
|
}
|
|
|
|
/* Return the current value of a DR register of the current thread's
|
|
context. */
|
|
|
|
static DWORD64
|
|
win32_get_current_dr (int dr)
|
|
{
|
|
win32_thread_info *th
|
|
= (win32_thread_info *) inferior_target_data (current_thread);
|
|
|
|
win32_require_context (th);
|
|
|
|
#define RET_DR(DR) \
|
|
case DR: \
|
|
return th->context.Dr ## DR
|
|
|
|
switch (dr)
|
|
{
|
|
RET_DR (0);
|
|
RET_DR (1);
|
|
RET_DR (2);
|
|
RET_DR (3);
|
|
RET_DR (6);
|
|
RET_DR (7);
|
|
}
|
|
|
|
#undef RET_DR
|
|
|
|
gdb_assert_not_reached ("unhandled dr");
|
|
}
|
|
|
|
static CORE_ADDR
|
|
x86_dr_low_get_addr (int regnum)
|
|
{
|
|
gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);
|
|
|
|
return win32_get_current_dr (regnum - DR_FIRSTADDR);
|
|
}
|
|
|
|
static unsigned long
|
|
x86_dr_low_get_control (void)
|
|
{
|
|
return win32_get_current_dr (7);
|
|
}
|
|
|
|
/* Get the value of the DR6 debug status register from the inferior
|
|
and record it in STATE. */
|
|
|
|
static unsigned long
|
|
x86_dr_low_get_status (void)
|
|
{
|
|
return win32_get_current_dr (6);
|
|
}
|
|
|
|
/* Low-level function vector. */
|
|
struct x86_dr_low_type x86_dr_low =
|
|
{
|
|
x86_dr_low_set_control,
|
|
x86_dr_low_set_addr,
|
|
x86_dr_low_get_addr,
|
|
x86_dr_low_get_status,
|
|
x86_dr_low_get_control,
|
|
sizeof (void *),
|
|
};
|
|
|
|
/* Breakpoint/watchpoint support. */
|
|
|
|
static int
|
|
i386_supports_z_point_type (char z_type)
|
|
{
|
|
switch (z_type)
|
|
{
|
|
case Z_PACKET_WRITE_WP:
|
|
case Z_PACKET_ACCESS_WP:
|
|
return 1;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static int
|
|
i386_insert_point (enum raw_bkpt_type type, CORE_ADDR addr,
|
|
int size, struct raw_breakpoint *bp)
|
|
{
|
|
switch (type)
|
|
{
|
|
case raw_bkpt_type_write_wp:
|
|
case raw_bkpt_type_access_wp:
|
|
{
|
|
enum target_hw_bp_type hw_type
|
|
= raw_bkpt_type_to_target_hw_bp_type (type);
|
|
|
|
return x86_dr_insert_watchpoint (&debug_reg_state,
|
|
hw_type, addr, size);
|
|
}
|
|
default:
|
|
/* Unsupported. */
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
static int
|
|
i386_remove_point (enum raw_bkpt_type type, CORE_ADDR addr,
|
|
int size, struct raw_breakpoint *bp)
|
|
{
|
|
switch (type)
|
|
{
|
|
case raw_bkpt_type_write_wp:
|
|
case raw_bkpt_type_access_wp:
|
|
{
|
|
enum target_hw_bp_type hw_type
|
|
= raw_bkpt_type_to_target_hw_bp_type (type);
|
|
|
|
return x86_dr_remove_watchpoint (&debug_reg_state,
|
|
hw_type, addr, size);
|
|
}
|
|
default:
|
|
/* Unsupported. */
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
static int
|
|
x86_stopped_by_watchpoint (void)
|
|
{
|
|
return x86_dr_stopped_by_watchpoint (&debug_reg_state);
|
|
}
|
|
|
|
static CORE_ADDR
|
|
x86_stopped_data_address (void)
|
|
{
|
|
CORE_ADDR addr;
|
|
if (x86_dr_stopped_data_address (&debug_reg_state, &addr))
|
|
return addr;
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
i386_initial_stuff (void)
|
|
{
|
|
x86_low_init_dregs (&debug_reg_state);
|
|
}
|
|
|
|
static void
|
|
i386_get_thread_context (win32_thread_info *th)
|
|
{
|
|
/* 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);
|
|
}
|
|
}
|
|
|
|
static void
|
|
i386_prepare_to_resume (win32_thread_info *th)
|
|
{
|
|
if (th->debug_registers_changed)
|
|
{
|
|
struct x86_debug_reg_state *dr = &debug_reg_state;
|
|
|
|
win32_require_context (th);
|
|
|
|
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;
|
|
|
|
th->debug_registers_changed = 0;
|
|
}
|
|
}
|
|
|
|
static void
|
|
i386_thread_added (win32_thread_info *th)
|
|
{
|
|
th->debug_registers_changed = 1;
|
|
}
|
|
|
|
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
|
|
i386_arch_setup (void)
|
|
{
|
|
#ifdef __x86_64__
|
|
init_registers_amd64 ();
|
|
win32_tdesc = tdesc_amd64;
|
|
#else
|
|
init_registers_i386 ();
|
|
win32_tdesc = tdesc_i386;
|
|
#endif
|
|
}
|
|
|
|
struct win32_target_ops the_low_target = {
|
|
i386_arch_setup,
|
|
sizeof (mappings) / sizeof (mappings[0]),
|
|
i386_initial_stuff,
|
|
i386_get_thread_context,
|
|
i386_prepare_to_resume,
|
|
i386_thread_added,
|
|
i386_fetch_inferior_register,
|
|
i386_store_inferior_register,
|
|
i386_single_step,
|
|
&i386_win32_breakpoint,
|
|
i386_win32_breakpoint_len,
|
|
i386_supports_z_point_type,
|
|
i386_insert_point,
|
|
i386_remove_point,
|
|
x86_stopped_by_watchpoint,
|
|
x86_stopped_data_address
|
|
};
|