-/* Copyright (C) 2007 Free Software Foundation, Inc.
+/* Copyright (C) 2007-2019 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 2 of the License, or
+ 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,
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, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "server.h"
#include "win32-low.h"
+#include "x86-low.h"
+#include "gdbsupport/x86-xstate.h"
+#ifdef __x86_64__
+#include "arch/amd64.h"
+#endif
+#include "arch/i386.h"
+#include "tdesc.h"
+#include "x86-tdesc.h"
+
+#ifndef CONTEXT_EXTENDED_REGISTERS
+#define CONTEXT_EXTENDED_REGISTERS 0
+#endif
#define FCS_REGNUM 27
#define FOP_REGNUM 31
#define FLAG_TRACE_BIT 0x100
-static unsigned dr[8];
+static struct x86_debug_reg_state debug_reg_state;
static void
-initial_stuff (void)
+update_debug_registers (thread_info *thread)
{
- memset (&dr, 0, sizeof (dr));
+ win32_thread_info *th = (win32_thread_info *) thread_target_data (thread);
+
+ /* The actual update is done later just before resuming the lwp,
+ we just mark that the registers need updating. */
+ th->debug_registers_changed = 1;
}
+/* Update the inferior's debug register REGNUM from STATE. */
+
static void
-store_debug_registers (win32_thread_info *th)
+x86_dr_low_set_addr (int regnum, CORE_ADDR addr)
{
- 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;
+ gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);
+
+ /* Only update the threads of this process. */
+ for_each_thread (current_thread->id.pid (), update_debug_registers);
}
+/* Update the inferior's DR7 debug control register from STATE. */
+
static void
-load_debug_registers (win32_thread_info *th)
+x86_dr_low_set_control (unsigned long control)
+{
+ /* Only update the threads of this process. */
+ for_each_thread (current_thread->id.pid (), update_debug_registers);
+}
+
+/* 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 *) thread_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)
{
- 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];
+ 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;
}
-/* Fetch register(s) from gdbserver regcache data. */
static void
-do_fetch_inferior_registers (win32_thread_info *th, int r)
+i386_initial_stuff (void)
{
- char *context_offset = regptr (&th->context, r);
+ x86_low_init_dregs (&debug_reg_state);
+}
- long l;
- if (r == FCS_REGNUM)
+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))
{
- l = *((long *) context_offset) & 0xffff;
- supply_register (r, (char *) &l);
+ DWORD e = GetLastError ();
+
+ if (extended_registers && e == ERROR_INVALID_PARAMETER)
+ {
+ extended_registers = 0;
+ goto again;
+ }
+
+ error ("GetThreadContext failure %ld\n", (long) e);
}
- else if (r == FOP_REGNUM)
+}
+
+static void
+i386_prepare_to_resume (win32_thread_info *th)
+{
+ if (th->debug_registers_changed)
{
- l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1);
- supply_register (r, (char *) &l);
+ 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;
}
- else
- supply_register (r, context_offset);
}
static void
-single_step (win32_thread_info *th)
+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
};
#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)
+{
+ struct target_desc *tdesc;
+
+#ifdef __x86_64__
+ tdesc = amd64_create_target_description (X86_XSTATE_SSE_MASK, false,
+ false, false);
+ const char **expedite_regs = amd64_expedite_regs;
+#else
+ tdesc = i386_create_target_description (X86_XSTATE_SSE_MASK, false, false);
+ const char **expedite_regs = i386_expedite_regs;
+#endif
+
+ init_target_desc (tdesc, expedite_regs);
+
+ win32_tdesc = tdesc;
+}
+
struct win32_target_ops the_low_target = {
- mappings,
+ i386_arch_setup,
sizeof (mappings) / sizeof (mappings[0]),
- initial_stuff,
- store_debug_registers,
- load_debug_registers,
- do_fetch_inferior_registers,
- single_step,
- (const char*)NULL, /* breakpoint */
- 0, /* breakpoint_len */
- "i386" /* arch_string */
+ 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
};
projects / deliverable / binutils-gdb.git / blobdiff