Rename 32- and 64-bit Intel files from "i386" to "x86"

This commit renames nine files that contain code used by both 32- and
64-bit Intel ports such that their names are prefixed with "x86"
rather than "i386".  All types, functions and variables within these
files are likewise renamed such that their names are prefixed with
"x86" rather than "i386".  This makes GDB follow the convention used
by gdbserver such that 32-bit Intel code lives in files called
"i386-*", 64-bit Intel code lives in files called "amd64-*", and code
for both 32- and 64-bit Intel lives in files called "x86-*".

This commit only renames OS-independent files.  The Linux ports of
both GDB and gdbserver now follow the i386/amd64/x86 convention fully.
Some ports still use the old convention where "i386" in file/function/
type/variable names can mean "32-bit only" or "32- and 64-bit" but I
don't want to touch ports I can't fully test except where absolutely
necessary.

gdb/ChangeLog:

	* i386-nat.h: Renamed as...
	* x86-nat.h: New file.  All type, function and variable name
	prefixes changed from "i386_" to "x86_".  All references updated.
	* i386-nat.c: Renamed as...
	* x86-nat.c: New file.  All type, function and variable name
	prefixes changed from "i386_" to "x86_".  All references updated.
	* common/i386-xstate.h: Renamed as...
	* common/x86-xstate.h: New file.  All type, function and variable
	name prefixes changed from "i386_" to "x86_".  All references
	updated.
	* nat/i386-cpuid.h: Renamed as...
	* nat/x86-cpuid.h: New file.  All type, function and variable name
	prefixes changed from "i386_" to "x86_".  All references updated.
	* nat/i386-gcc-cpuid.h: Renamed as...
	* nat/x86-gcc-cpuid.h: New file.  All type, function and variable
	name prefixes changed from "i386_" to "x86_".  All references
	updated.
	* nat/i386-dregs.h: Renamed as...
	* nat/x86-dregs.h: New file.  All type, function and variable name
	prefixes changed from "i386_" to "x86_".  All references updated.
	* nat/i386-dregs.c: Renamed as...
	* nat/x86-dregs.c: New file.  All type, function and variable name
	prefixes changed from "i386_" to "x86_".  All references updated.

gdb/gdbserver/ChangeLog:

	* i386-low.h: Renamed as...
	* x86-low.h: New file.  All type, function and variable name
	prefixes changed from "i386_" to "x86_".  All references updated.
	* i386-low.c: Renamed as...
	* x86-low.c: New file.  All type, function and variable name
	prefixes changed from "i386_" to "x86_".  All references updated.

1 files changed, 126 insertions, 0 deletions

diff --git a/gdb/nat/x86-dregs.h b/gdb/nat/x86-dregs.h
new file mode 100644
index 0000000..fb179a5
--- /dev/null
+++ b/gdb/nat/x86-dregs.h
@@ -0,0 +1,126 @@
+/* Debug register code for x86 (i386 and x86-64).
+
+   Copyright (C) 2009-2014 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/>.  */
+
+/* Support for hardware watchpoints and breakpoints using the x86
+   debug registers.
+
+   This provides several functions for inserting and removing
+   hardware-assisted breakpoints and watchpoints, testing if one or
+   more of the watchpoints triggered and at what address, checking
+   whether a given region can be watched, etc.
+
+   The functions below implement debug registers sharing by reference
+   counts, and allow to watch regions up to 16 bytes long
+   (32 bytes on 64 bit hosts).  */
+
+#ifndef X86_DREGS_H
+#define X86_DREGS_H 1
+
+/* Forward declaration.  */
+enum target_hw_bp_type;
+
+/* Low-level function vector.  */
+
+struct x86_dr_low_type
+  {
+    /* Set the debug control (DR7) register to a given value for
+       all LWPs.  May be NULL if the debug control register cannot
+       be set.  */
+    void (*set_control) (unsigned long);
+
+    /* Put an address into one debug register for all LWPs.  May
+       be NULL if debug registers cannot be set*/
+    void (*set_addr) (int, CORE_ADDR);
+
+    /* Return the address in a given debug register of the current
+       LWP.  */
+    CORE_ADDR (*get_addr) (int);
+
+    /* Return the value of the debug status (DR6) register for
+       current LWP.  */
+    unsigned long (*get_status) (void);
+
+    /* Return the value of the debug control (DR7) register for
+       current LWP.  */
+    unsigned long (*get_control) (void);
+
+    /* Number of bytes used for debug registers (4 or 8).  */
+    int debug_register_length;
+  };
+
+extern struct x86_dr_low_type x86_dr_low;
+
+/* Debug registers' indices.  */
+#define DR_FIRSTADDR 0
+#define DR_LASTADDR  3
+#define DR_NADDR     4	/* The number of debug address registers.  */
+#define DR_STATUS    6	/* Index of debug status register (DR6).  */
+#define DR_CONTROL   7	/* Index of debug control register (DR7).  */
+
+/* Global state needed to track h/w watchpoints.  */
+
+struct x86_debug_reg_state
+{
+  /* Mirror the inferior's DRi registers.  We keep the status and
+     control registers separated because they don't hold addresses.
+     Note that since we can change these mirrors while threads are
+     running, we never trust them to explain a cause of a trap.
+     For that, we need to peek directly in the inferior registers.  */
+  CORE_ADDR dr_mirror[DR_NADDR];
+  unsigned dr_status_mirror, dr_control_mirror;
+
+  /* Reference counts for each debug register.  */
+  int dr_ref_count[DR_NADDR];
+};
+
+/* A macro to loop over all debug registers.  */
+#define ALL_DEBUG_REGISTERS(i)	for (i = 0; i < DR_NADDR; i++)
+
+/* Insert a watchpoint to watch a memory region which starts at
+   address ADDR and whose length is LEN bytes.  Watch memory accesses
+   of the type TYPE.  Return 0 on success, -1 on failure.  */
+extern int x86_dr_insert_watchpoint (struct x86_debug_reg_state *state,
+				     enum target_hw_bp_type type,
+				     CORE_ADDR addr,
+				     int len);
+
+/* Remove a watchpoint that watched the memory region which starts at
+   address ADDR, whose length is LEN bytes, and for accesses of the
+   type TYPE.  Return 0 on success, -1 on failure.  */
+extern int x86_dr_remove_watchpoint (struct x86_debug_reg_state *state,
+				     enum target_hw_bp_type type,
+				     CORE_ADDR addr,
+				     int len);
+
+/* Return non-zero if we can watch a memory region that starts at
+   address ADDR and whose length is LEN bytes.  */
+extern int x86_dr_region_ok_for_watchpoint (struct x86_debug_reg_state *state,
+					    CORE_ADDR addr, int len);
+
+/* If the inferior has some break/watchpoint that triggered, set the
+   address associated with that break/watchpoint and return true.
+   Otherwise, return false.  */
+extern int x86_dr_stopped_data_address (struct x86_debug_reg_state *state,
+					CORE_ADDR *addr_p);
+
+/* Return true if the inferior has some watchpoint that triggered.
+   Otherwise return false.  */
+extern int x86_dr_stopped_by_watchpoint (struct x86_debug_reg_state *state);
+
+#endif /* X86_DREGS_H */