gdbserver: rename source files to .cc

For the same reasons outlined in the previous patch, this patch renames
gdbserver source files to .cc.

I have moved the "-x c++" switch to only those rules that require it.

gdbserver/ChangeLog:

	* Makefile.in: Rename source files from .c to .cc.
	* %.c: Rename to %.cc.
	* configure.ac: Rename server.c to server.cc.
	* configure: Re-generate.

1 files changed, 468 insertions, 0 deletions

diff --git a/gdbserver/win32-i386-low.cc b/gdbserver/win32-i386-low.cc
new file mode 100644
index 00000000000..f5f09e96a57
--- /dev/null
+++ b/gdbserver/win32-i386-low.cc
@@ -0,0 +1,468 @@
+/* Copyright (C) 2007-2020 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"
+#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 struct x86_debug_reg_state debug_reg_state;
+
+static void
+update_debug_registers (thread_info *thread)
+{
+  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
+x86_dr_low_set_addr (int regnum, CORE_ADDR addr)
+{
+  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
+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)
+{
+  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)
+{
+  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 = {
+  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
+};