/* Subroutines for insn-output.c for Windows NT.
Contributed by Douglas Rupp (drupp@cs.washington.edu)
- Copyright (C) 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
- Free Software Foundation, Inc.
+ Copyright (C) 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
+ 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
This file is part of GCC.
GCC 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, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
for more details.
You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "tree.h"
#include "flags.h"
#include "tm_p.h"
-#include "toplev.h"
+#include "diagnostic-core.h"
#include "hashtab.h"
+#include "langhooks.h"
#include "ggc.h"
+#include "target.h"
+#include "except.h"
+#include "lto-streamer.h"
/* i386/PE specific attribute support.
multiple times.
*/
-static tree associated_type (tree);
-static const char * gen_stdcall_suffix (tree);
-static const char * gen_fastcall_suffix (tree);
-static int i386_pe_dllexport_p (tree);
-static int i386_pe_dllimport_p (tree);
-static void i386_pe_mark_dllexport (tree);
-static void i386_pe_mark_dllimport (tree);
-
-/* This is we how mark internal identifiers with dllimport or dllexport
- attributes. */
-#ifndef DLL_IMPORT_PREFIX
-#define DLL_IMPORT_PREFIX "#i."
-#endif
-#ifndef DLL_EXPORT_PREFIX
-#define DLL_EXPORT_PREFIX "#e."
-#endif
-
-/* Handle a "dllimport" or "dllexport" attribute;
+/* Handle a "shared" attribute;
arguments as in struct attribute_spec.handler. */
tree
-ix86_handle_dll_attribute (tree * pnode, tree name, tree args, int flags,
- bool *no_add_attrs)
+ix86_handle_shared_attribute (tree *node, tree name,
+ tree args ATTRIBUTE_UNUSED,
+ int flags ATTRIBUTE_UNUSED, bool *no_add_attrs)
{
- tree node = *pnode;
-
- /* These attributes may apply to structure and union types being created,
- but otherwise should pass to the declaration involved. */
- if (!DECL_P (node))
- {
- if (flags & ((int) ATTR_FLAG_DECL_NEXT | (int) ATTR_FLAG_FUNCTION_NEXT
- | (int) ATTR_FLAG_ARRAY_NEXT))
- {
- *no_add_attrs = true;
- return tree_cons (name, args, NULL_TREE);
- }
- if (TREE_CODE (node) != RECORD_TYPE && TREE_CODE (node) != UNION_TYPE)
- {
- warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
- *no_add_attrs = true;
- }
-
- return NULL_TREE;
- }
-
- /* Report error on dllimport ambiguities seen now before they cause
- any damage. */
- else if (is_attribute_p ("dllimport", name))
- {
- /* Like MS, treat definition of dllimported variables and
- non-inlined functions on declaration as syntax errors.
- We allow the attribute for function definitions if declared
- inline, but just ignore it in i386_pe_dllimport_p. */
- if (TREE_CODE (node) == FUNCTION_DECL && DECL_INITIAL (node)
- && !DECL_INLINE (node))
- {
- error ("%Jfunction `%D' definition is marked dllimport.", node, node);
- *no_add_attrs = true;
- }
-
- else if (TREE_CODE (node) == VAR_DECL)
- {
- if (DECL_INITIAL (node))
- {
- error ("%Jvariable `%D' definition is marked dllimport.",
- node, node);
- *no_add_attrs = true;
- }
-
- /* `extern' needn't be specified with dllimport.
- Specify `extern' now and hope for the best. Sigh. */
- DECL_EXTERNAL (node) = 1;
- /* Also, implicitly give dllimport'd variables declared within
- a function global scope, unless declared static. */
- if (current_function_decl != NULL_TREE && !TREE_STATIC (node))
- TREE_PUBLIC (node) = 1;
- }
- }
-
- /* Report error if symbol is not accessible at global scope. */
- if (!TREE_PUBLIC (node)
- && (TREE_CODE (node) == VAR_DECL
- || TREE_CODE (node) == FUNCTION_DECL))
+ if (TREE_CODE (*node) != VAR_DECL)
{
- error ("%Jexternal linkage required for symbol '%D' because of "
- "'%s' attribute.", node, node, IDENTIFIER_POINTER (name));
+ warning (OPT_Wattributes, "%qE attribute only applies to variables",
+ name);
*no_add_attrs = true;
}
return NULL_TREE;
}
-/* Handle a "shared" attribute;
+/* Handle a "selectany" attribute;
arguments as in struct attribute_spec.handler. */
tree
-ix86_handle_shared_attribute (tree *node, tree name,
- tree args ATTRIBUTE_UNUSED,
- int flags ATTRIBUTE_UNUSED, bool *no_add_attrs)
+ix86_handle_selectany_attribute (tree *node, tree name,
+ tree args ATTRIBUTE_UNUSED,
+ int flags ATTRIBUTE_UNUSED,
+ bool *no_add_attrs)
{
- if (TREE_CODE (*node) != VAR_DECL)
- {
- warning ("`%s' attribute only applies to variables",
- IDENTIFIER_POINTER (name));
+ /* The attribute applies only to objects that are initialized and have
+ external linkage. However, we may not know about initialization
+ until the language frontend has processed the decl. We'll check for
+ initialization later in encode_section_info. */
+ if (TREE_CODE (*node) != VAR_DECL || !TREE_PUBLIC (*node))
+ {
+ error ("%qE attribute applies only to initialized variables"
+ " with external linkage", name);
*no_add_attrs = true;
}
return NULL_TREE;
}
+
\f
/* Return the type that we should use to determine if DECL is
imported or exported. */
static tree
associated_type (tree decl)
{
- tree t = NULL_TREE;
-
- /* In the C++ frontend, DECL_CONTEXT for a method doesn't actually refer
- to the containing class. So we look at the 'this' arg. */
- if (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
- {
- /* Artificial methods are not affected by the import/export status
- of their class unless they are COMDAT. Implicit copy ctor's and
- dtor's are not affected by class status but virtual and
- non-virtual thunks are. */
- if (!DECL_ARTIFICIAL (decl) || DECL_COMDAT (decl))
- t = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl))));
- }
- else if (DECL_CONTEXT (decl)
- && TREE_CODE_CLASS (TREE_CODE (DECL_CONTEXT (decl))) == 't')
- t = DECL_CONTEXT (decl);
-
- return t;
+ return (DECL_CONTEXT (decl) && TYPE_P (DECL_CONTEXT (decl))
+ ? DECL_CONTEXT (decl) : NULL_TREE);
}
-/* Return nonzero if DECL is a dllexport'd object. */
+/* Return true if DECL should be a dllexport'd object. */
-static int
-i386_pe_dllexport_p (tree decl)
+static bool
+i386_pe_determine_dllexport_p (tree decl)
{
- tree exp;
+ if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != FUNCTION_DECL)
+ return false;
- if (TREE_CODE (decl) != VAR_DECL
- && TREE_CODE (decl) != FUNCTION_DECL)
- return 0;
- exp = lookup_attribute ("dllexport", DECL_ATTRIBUTES (decl));
- if (exp)
- return 1;
+ /* Don't export local clones of dllexports. */
+ if (!TREE_PUBLIC (decl))
+ return false;
- /* Class members get the dllexport status of their class. */
- if (associated_type (decl))
- {
- exp = lookup_attribute ("dllexport",
- TYPE_ATTRIBUTES (associated_type (decl)));
- if (exp)
- return 1;
- }
+ if (lookup_attribute ("dllexport", DECL_ATTRIBUTES (decl)))
+ return true;
- return 0;
+ return false;
}
-/* Return nonzero if DECL is a dllimport'd object. */
+/* Return true if DECL should be a dllimport'd object. */
-static int
-i386_pe_dllimport_p (tree decl)
+static bool
+i386_pe_determine_dllimport_p (tree decl)
{
- tree imp;
- int context_imp = 0;
+ tree assoc;
+
+ if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != FUNCTION_DECL)
+ return false;
+
+ if (DECL_DLLIMPORT_P (decl))
+ return true;
+
+ /* The DECL_DLLIMPORT_P flag was set for decls in the class definition
+ by targetm.cxx.adjust_class_at_definition. Check again to emit
+ error message if the class attribute has been overridden by an
+ out-of-class definition of static data. */
+ assoc = associated_type (decl);
+ if (assoc && lookup_attribute ("dllimport", TYPE_ATTRIBUTES (assoc))
+ && TREE_CODE (decl) == VAR_DECL
+ && TREE_STATIC (decl) && TREE_PUBLIC (decl)
+ && !DECL_EXTERNAL (decl)
+ /* vtable's are linkonce constants, so defining a vtable is not
+ an error as long as we don't try to import it too. */
+ && !DECL_VIRTUAL_P (decl))
+ error ("definition of static data member %q+D of "
+ "dllimport%'d class", decl);
+
+ return false;
+}
- if (TREE_CODE (decl) == FUNCTION_DECL
- && TARGET_NOP_FUN_DLLIMPORT)
- return 0;
+/* Handle the -mno-fun-dllimport target switch. */
- if (TREE_CODE (decl) != VAR_DECL
- && TREE_CODE (decl) != FUNCTION_DECL)
- return 0;
+bool
+i386_pe_valid_dllimport_attribute_p (const_tree decl)
+{
+ if (TARGET_NOP_FUN_DLLIMPORT && TREE_CODE (decl) == FUNCTION_DECL)
+ return false;
+ return true;
+}
- imp = lookup_attribute ("dllimport", DECL_ATTRIBUTES (decl));
+/* Return string which is the function name, identified by ID, modified
+ with a suffix consisting of an atsign (@) followed by the number of
+ bytes of arguments. If ID is NULL use the DECL_NAME as base. If
+ FASTCALL is true, also add the FASTCALL_PREFIX.
+ Return NULL if no change required. */
- /* Class members get the dllimport status of their class. */
- if (!imp && associated_type (decl))
- {
- imp = lookup_attribute ("dllimport",
- TYPE_ATTRIBUTES (associated_type (decl)));
- if (imp)
- context_imp = 1;
- }
+static tree
+gen_stdcall_or_fastcall_suffix (tree decl, tree id, bool fastcall)
+{
+ HOST_WIDE_INT total = 0;
+ const char *old_str = IDENTIFIER_POINTER (id != NULL_TREE ? id : DECL_NAME (decl));
+ char *new_str, *p;
+ tree type = TREE_TYPE (DECL_ORIGIN (decl));
+ tree arg;
+ function_args_iterator args_iter;
- if (imp)
- {
- /* Don't mark defined functions as dllimport. If the definition
- itself was marked with dllimport, than ix86_handle_dll_attribute
- reports an error. This handles the case when the definition
- overrides an earlier declaration. */
- if (TREE_CODE (decl) == FUNCTION_DECL && DECL_INITIAL (decl)
- && !DECL_INLINE (decl))
- {
- /* Don't warn about artificial methods. */
- if (!DECL_ARTIFICIAL (decl))
- warning ("%Jfunction '%D' is defined after prior declaration "
- "as dllimport: attribute ignored", decl, decl);
- return 0;
- }
+ gcc_assert (TREE_CODE (decl) == FUNCTION_DECL);
- /* We ignore the dllimport attribute for inline member functions.
- This differs from MSVC behavior which treats it like GNUC
- 'extern inline' extension. */
- else if (TREE_CODE (decl) == FUNCTION_DECL && DECL_INLINE (decl))
- {
- if (extra_warnings)
- warning ("%Jinline function '%D' is declared as dllimport: "
- "attribute ignored.", decl, decl);
- return 0;
- }
+ if (prototype_p (type))
+ {
+ /* This attribute is ignored for variadic functions. */
+ if (stdarg_p (type))
+ return NULL_TREE;
- /* Don't allow definitions of static data members in dllimport class,
- Just ignore attribute for vtable data. */
- else if (TREE_CODE (decl) == VAR_DECL
- && TREE_STATIC (decl) && TREE_PUBLIC (decl)
- && !DECL_EXTERNAL (decl) && context_imp)
+ /* Quit if we hit an incomplete type. Error is reported
+ by convert_arguments in c-typeck.c or cp/typeck.c. */
+ FOREACH_FUNCTION_ARGS(type, arg, args_iter)
{
- if (!DECL_VIRTUAL_P (decl))
- error ("%Jdefinition of static data member '%D' of "
- "dllimport'd class.", decl, decl);
- return 0;
- }
+ HOST_WIDE_INT parm_size;
+ HOST_WIDE_INT parm_boundary_bytes = PARM_BOUNDARY / BITS_PER_UNIT;
- /* Since we can't treat a pointer to a dllimport'd symbol as a
- constant address, we turn off the attribute on C++ virtual
- methods to allow creation of vtables using thunks. Don't mark
- artificial methods either (in associated_type, only COMDAT
- artificial method get import status from class context). */
- else if (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE
- && (DECL_VIRTUAL_P (decl) || DECL_ARTIFICIAL (decl)))
- return 0;
+ if (! COMPLETE_TYPE_P (arg))
+ break;
- return 1;
- }
+ parm_size = int_size_in_bytes (arg);
+ if (parm_size < 0)
+ break;
- return 0;
-}
+ /* Must round up to include padding. This is done the same
+ way as in store_one_arg. */
+ parm_size = ((parm_size + parm_boundary_bytes - 1)
+ / parm_boundary_bytes * parm_boundary_bytes);
+ total += parm_size;
+ }
+ }
-/* Return nonzero if SYMBOL is marked as being dllexport'd. */
+ /* Assume max of 8 base 10 digits in the suffix. */
+ p = new_str = XALLOCAVEC (char, 1 + strlen (old_str) + 1 + 8 + 1);
+ if (fastcall)
+ *p++ = FASTCALL_PREFIX;
+ sprintf (p, "%s@" HOST_WIDE_INT_PRINT_DEC, old_str, total);
-int
-i386_pe_dllexport_name_p (const char *symbol)
-{
- return (strncmp (DLL_EXPORT_PREFIX, symbol,
- strlen (DLL_EXPORT_PREFIX)) == 0);
+ return get_identifier (new_str);
}
-/* Return nonzero if SYMBOL is marked as being dllimport'd. */
+/* Maybe decorate and get a new identifier for the DECL of a stdcall or
+ fastcall function. The original identifier is supplied in ID. */
-int
-i386_pe_dllimport_name_p (const char *symbol)
+static tree
+i386_pe_maybe_mangle_decl_assembler_name (tree decl, tree id)
{
- return (strncmp (DLL_IMPORT_PREFIX, symbol,
- strlen (DLL_IMPORT_PREFIX)) == 0);
-}
-
-/* Mark a DECL as being dllexport'd.
- Note that we override the previous setting (eg: dllimport). */
-
-static void
-i386_pe_mark_dllexport (tree decl)
-{
- const char *oldname;
- char *newname;
- rtx rtlname;
- tree idp;
-
- rtlname = XEXP (DECL_RTL (decl), 0);
- if (GET_CODE (rtlname) == SYMBOL_REF)
- oldname = XSTR (rtlname, 0);
- else if (GET_CODE (rtlname) == MEM
- && GET_CODE (XEXP (rtlname, 0)) == SYMBOL_REF)
- oldname = XSTR (XEXP (rtlname, 0), 0);
- else
- abort ();
- if (i386_pe_dllimport_name_p (oldname))
- {
- warning ("%Jinconsistent dll linkage for '%D', dllexport assumed.",
- decl, decl);
- /* Remove DLL_IMPORT_PREFIX. */
- oldname += strlen (DLL_IMPORT_PREFIX);
- DECL_NON_ADDR_CONST_P (decl) = 0;
- }
- else if (i386_pe_dllexport_name_p (oldname))
- return; /* already done */
-
- newname = alloca (strlen (DLL_EXPORT_PREFIX) + strlen (oldname) + 1);
- sprintf (newname, "%s%s", DLL_EXPORT_PREFIX, oldname);
-
- /* We pass newname through get_identifier to ensure it has a unique
- address. RTL processing can sometimes peek inside the symbol ref
- and compare the string's addresses to see if two symbols are
- identical. */
- idp = get_identifier (newname);
-
- XEXP (DECL_RTL (decl), 0) =
- gen_rtx_SYMBOL_REF (Pmode, IDENTIFIER_POINTER (idp));
-}
+ tree new_id = NULL_TREE;
-/* Mark a DECL as being dllimport'd. */
-
-static void
-i386_pe_mark_dllimport (tree decl)
-{
- const char *oldname;
- char *newname;
- tree idp;
- rtx rtlname, newrtl;
-
- rtlname = XEXP (DECL_RTL (decl), 0);
- if (GET_CODE (rtlname) == SYMBOL_REF)
- oldname = XSTR (rtlname, 0);
- else if (GET_CODE (rtlname) == MEM
- && GET_CODE (XEXP (rtlname, 0)) == SYMBOL_REF)
- oldname = XSTR (XEXP (rtlname, 0), 0);
- else
- abort ();
- if (i386_pe_dllexport_name_p (oldname))
- {
- error ("`%s' declared as both exported to and imported from a DLL",
- IDENTIFIER_POINTER (DECL_NAME (decl)));
- return;
- }
- else if (i386_pe_dllimport_name_p (oldname))
- {
- /* Already done, but do a sanity check to prevent assembler errors. */
- if (!DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl))
- {
- error ("%Jfailure in redeclaration of '%D': dllimport'd "
- "symbol lacks external linkage.", decl, decl);
- abort();
+ if (TREE_CODE (decl) == FUNCTION_DECL)
+ {
+ unsigned int ccvt = ix86_get_callcvt (TREE_TYPE (decl));
+ if ((ccvt & IX86_CALLCVT_STDCALL) != 0)
+ {
+ if (TARGET_RTD)
+ /* If we are using -mrtd emit undecorated symbol and let linker
+ do the proper resolving. */
+ return NULL_TREE;
+ new_id = gen_stdcall_or_fastcall_suffix (decl, id, false);
}
- return;
+ else if ((ccvt & IX86_CALLCVT_FASTCALL) != 0)
+ new_id = gen_stdcall_or_fastcall_suffix (decl, id, true);
}
- newname = alloca (strlen (DLL_IMPORT_PREFIX) + strlen (oldname) + 1);
- sprintf (newname, "%s%s", DLL_IMPORT_PREFIX, oldname);
-
- /* We pass newname through get_identifier to ensure it has a unique
- address. RTL processing can sometimes peek inside the symbol ref
- and compare the string's addresses to see if two symbols are
- identical. */
- idp = get_identifier (newname);
+ return new_id;
+}
- newrtl = gen_rtx_MEM (Pmode,
- gen_rtx_SYMBOL_REF (Pmode,
- IDENTIFIER_POINTER (idp)));
- XEXP (DECL_RTL (decl), 0) = newrtl;
+/* Emit an assembler directive to set symbol for DECL visibility to
+ the visibility type VIS, which must not be VISIBILITY_DEFAULT.
+ As for PE there is no hidden support in gas, we just warn for
+ user-specified visibility attributes. */
- /* Can't treat a pointer to this as a constant address */
- DECL_NON_ADDR_CONST_P (decl) = 1;
+void
+i386_pe_assemble_visibility (tree decl,
+ int vis ATTRIBUTE_UNUSED)
+{
+ if (!decl
+ || !lookup_attribute ("visibility", DECL_ATTRIBUTES (decl)))
+ return;
+ warning (OPT_Wattributes, "visibility attribute not supported "
+ "in this configuration; ignored");
}
-/* Return string which is the former assembler name modified with a
- prefix consisting of FASTCALL_PREFIX and a suffix consisting of an
- atsign (@) followed by the number of bytes of arguments. */
-
-static const char *
-gen_fastcall_suffix (tree decl)
-{
- int total = 0;
- const char *asmname = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
- char *newsym;
-
- if (TYPE_ARG_TYPES (TREE_TYPE (decl)))
- if (TREE_VALUE (tree_last (TYPE_ARG_TYPES (TREE_TYPE (decl))))
- == void_type_node)
- {
- tree formal_type = TYPE_ARG_TYPES (TREE_TYPE (decl));
-
- /* Quit if we hit an incomplete type. Error is reported
- by convert_arguments in c-typeck.c or cp/typeck.c. */
- while (TREE_VALUE (formal_type) != void_type_node
- && COMPLETE_TYPE_P (TREE_VALUE (formal_type)))
- {
- int parm_size
- = TREE_INT_CST_LOW (TYPE_SIZE (TREE_VALUE (formal_type)));
- /* Must round up to include padding. This is done the same
- way as in store_one_arg. */
- parm_size = ((parm_size + PARM_BOUNDARY - 1)
- / PARM_BOUNDARY * PARM_BOUNDARY);
- total += parm_size;
- formal_type = TREE_CHAIN (formal_type);
- }
- }
+/* This is used as a target hook to modify the DECL_ASSEMBLER_NAME
+ in the language-independent default hook
+ langhooks,c:lhd_set_decl_assembler_name ()
+ and in cp/mangle,c:mangle_decl (). */
+tree
+i386_pe_mangle_decl_assembler_name (tree decl, tree id)
+{
+ tree new_id = i386_pe_maybe_mangle_decl_assembler_name (decl, id);
- /* Assume max of 8 base 10 digits in the suffix. */
- newsym = xmalloc (1 + strlen (asmname) + 1 + 8 + 1);
- sprintf (newsym, "%c%s@%d", FASTCALL_PREFIX, asmname, total/BITS_PER_UNIT);
- return IDENTIFIER_POINTER (get_identifier (newsym));
+ return (new_id ? new_id : id);
}
-/* Return string which is the former assembler name modified with a
- suffix consisting of an atsign (@) followed by the number of bytes of
- arguments */
+/* This hook behaves the same as varasm.c/assemble_name(), but
+ generates the name into memory rather than outputting it to
+ a file stream. */
-static const char *
-gen_stdcall_suffix (tree decl)
-{
- int total = 0;
- /* ??? This probably should use XSTR (XEXP (DECL_RTL (decl), 0), 0) instead
- of DECL_ASSEMBLER_NAME. */
- const char *asmname = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
- char *newsym;
-
- if (TYPE_ARG_TYPES (TREE_TYPE (decl)))
- if (TREE_VALUE (tree_last (TYPE_ARG_TYPES (TREE_TYPE (decl))))
- == void_type_node)
- {
- tree formal_type = TYPE_ARG_TYPES (TREE_TYPE (decl));
-
- /* Quit if we hit an incomplete type. Error is reported
- by convert_arguments in c-typeck.c or cp/typeck.c. */
- while (TREE_VALUE (formal_type) != void_type_node
- && COMPLETE_TYPE_P (TREE_VALUE (formal_type)))
- {
- int parm_size
- = TREE_INT_CST_LOW (TYPE_SIZE (TREE_VALUE (formal_type)));
- /* Must round up to include padding. This is done the same
- way as in store_one_arg. */
- parm_size = ((parm_size + PARM_BOUNDARY - 1)
- / PARM_BOUNDARY * PARM_BOUNDARY);
- total += parm_size;
- formal_type = TREE_CHAIN (formal_type);
- }
- }
-
- /* Assume max of 8 base 10 digits in the suffix. */
- newsym = xmalloc (strlen (asmname) + 1 + 8 + 1);
- sprintf (newsym, "%s@%d", asmname, total/BITS_PER_UNIT);
- return IDENTIFIER_POINTER (get_identifier (newsym));
+tree
+i386_pe_mangle_assembler_name (const char *name ATTRIBUTE_UNUSED)
+{
+ const char *skipped = name + (*name == '*' ? 1 : 0);
+ const char *stripped = targetm.strip_name_encoding (skipped);
+ if (*name != '*' && *user_label_prefix && *stripped != FASTCALL_PREFIX)
+ stripped = ACONCAT ((user_label_prefix, stripped, NULL));
+ return get_identifier (stripped);
}
void
i386_pe_encode_section_info (tree decl, rtx rtl, int first)
{
- default_encode_section_info (decl, rtl, first);
+ rtx symbol;
+ int flags;
- if (TREE_CODE (decl) == FUNCTION_DECL)
- {
- if (lookup_attribute ("stdcall",
- TYPE_ATTRIBUTES (TREE_TYPE (decl))))
- XEXP (DECL_RTL (decl), 0) =
- gen_rtx_SYMBOL_REF (Pmode, gen_stdcall_suffix (decl));
- else if (lookup_attribute ("fastcall",
- TYPE_ATTRIBUTES (TREE_TYPE (decl))))
- XEXP (DECL_RTL (decl), 0) =
- gen_rtx_SYMBOL_REF (Pmode, gen_fastcall_suffix (decl));
- }
-
- /* Mark the decl so we can tell from the rtl whether the object is
- dllexport'd or dllimport'd. This also handles dllexport/dllimport
- override semantics. */
-
- if (i386_pe_dllexport_p (decl))
- i386_pe_mark_dllexport (decl);
- else if (i386_pe_dllimport_p (decl))
- i386_pe_mark_dllimport (decl);
- /* It might be that DECL has already been marked as dllimport, but a
- subsequent definition nullified that. The attribute is gone but
- DECL_RTL still has (DLL_IMPORT_PREFIX) prefixed. We need to remove
- that. Ditto for the DECL_NON_ADDR_CONST_P flag. */
- else if ((TREE_CODE (decl) == FUNCTION_DECL
- || TREE_CODE (decl) == VAR_DECL)
- && DECL_RTL (decl) != NULL_RTX
- && GET_CODE (DECL_RTL (decl)) == MEM
- && GET_CODE (XEXP (DECL_RTL (decl), 0)) == MEM
- && GET_CODE (XEXP (XEXP (DECL_RTL (decl), 0), 0)) == SYMBOL_REF
- && i386_pe_dllimport_name_p (XSTR (XEXP (XEXP (DECL_RTL (decl), 0), 0), 0)))
- {
- const char *oldname = XSTR (XEXP (XEXP (DECL_RTL (decl), 0), 0), 0);
+ /* Do this last, due to our frobbing of DECL_DLLIMPORT_P above. */
+ default_encode_section_info (decl, rtl, first);
- /* Remove DLL_IMPORT_PREFIX. */
- tree idp = get_identifier (oldname + strlen (DLL_IMPORT_PREFIX));
- rtx newrtl = gen_rtx_SYMBOL_REF (Pmode, IDENTIFIER_POINTER (idp));
+ /* Careful not to prod global register variables. */
+ if (!MEM_P (rtl))
+ return;
- if (DECL_INITIAL (decl) || !DECL_EXTERNAL (decl))
- warning ("%J'%D' defined locally after being "
- "referenced with dllimport linkage", decl, decl);
- else
- warning ("%J'%D' redeclared without dllimport attribute "
- "after being referenced with dllimport linkage", decl, decl);
+ symbol = XEXP (rtl, 0);
+ gcc_assert (GET_CODE (symbol) == SYMBOL_REF);
- XEXP (DECL_RTL (decl), 0) = newrtl;
+ switch (TREE_CODE (decl))
+ {
+ case FUNCTION_DECL:
+ /* FIXME: Imported stdcall names are not modified by the Ada frontend.
+ Check and decorate the RTL name now. */
+ if (strcmp (lang_hooks.name, "GNU Ada") == 0)
+ {
+ tree new_id;
+ tree old_id = DECL_ASSEMBLER_NAME (decl);
+ const char* asm_str = IDENTIFIER_POINTER (old_id);
+ /* Do not change the identifier if a verbatim asmspec
+ or if stdcall suffix already added. */
+ if (!(*asm_str == '*' || strchr (asm_str, '@'))
+ && (new_id = i386_pe_maybe_mangle_decl_assembler_name (decl,
+ old_id)))
+ XSTR (symbol, 0) = IDENTIFIER_POINTER (new_id);
+ }
+ break;
- DECL_NON_ADDR_CONST_P (decl) = 0;
+ case VAR_DECL:
+ if (lookup_attribute ("selectany", DECL_ATTRIBUTES (decl)))
+ {
+ if (DECL_INITIAL (decl)
+ /* If an object is initialized with a ctor, the static
+ initialization and destruction code for it is present in
+ each unit defining the object. The code that calls the
+ ctor is protected by a link-once guard variable, so that
+ the object still has link-once semantics, */
+ || TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl)))
+ make_decl_one_only (decl, DECL_ASSEMBLER_NAME (decl));
+ else
+ error ("%q+D:'selectany' attribute applies only to "
+ "initialized objects", decl);
+ }
+ break;
- /* We previously set TREE_PUBLIC and DECL_EXTERNAL.
- We leave these alone for now. */
+ default:
+ return;
}
-}
-/* Strip only the leading encoding, leaving the stdcall suffix and fastcall
- prefix if it exists. */
+ /* Mark the decl so we can tell from the rtl whether the object is
+ dllexport'd or dllimport'd. tree.c: merge_dllimport_decl_attributes
+ handles dllexport/dllimport override semantics. */
+ flags = (SYMBOL_REF_FLAGS (symbol) &
+ ~(SYMBOL_FLAG_DLLIMPORT | SYMBOL_FLAG_DLLEXPORT));
+ if (i386_pe_determine_dllexport_p (decl))
+ flags |= SYMBOL_FLAG_DLLEXPORT;
+ else if (i386_pe_determine_dllimport_p (decl))
+ flags |= SYMBOL_FLAG_DLLIMPORT;
+
+ SYMBOL_REF_FLAGS (symbol) = flags;
+}
-const char *
-i386_pe_strip_name_encoding (const char *str)
+bool
+i386_pe_binds_local_p (const_tree exp)
{
- if (strncmp (str, DLL_IMPORT_PREFIX, strlen (DLL_IMPORT_PREFIX))
- == 0)
- str += strlen (DLL_IMPORT_PREFIX);
- else if (strncmp (str, DLL_EXPORT_PREFIX, strlen (DLL_EXPORT_PREFIX))
- == 0)
- str += strlen (DLL_EXPORT_PREFIX);
- if (*str == '*')
- str += 1;
- return str;
+ /* PE does not do dynamic binding. Indeed, the only kind of
+ non-local reference comes from a dllimport'd symbol. */
+ if ((TREE_CODE (exp) == VAR_DECL || TREE_CODE (exp) == FUNCTION_DECL)
+ && DECL_DLLIMPORT_P (exp))
+ return false;
+
+ /* Or a weak one, now that they are supported. */
+ if ((TREE_CODE (exp) == VAR_DECL || TREE_CODE (exp) == FUNCTION_DECL)
+ && DECL_WEAK (exp))
+ return false;
+
+ return true;
}
/* Also strip the fastcall prefix and stdcall suffix. */
i386_pe_strip_name_encoding_full (const char *str)
{
const char *p;
- const char *name = i386_pe_strip_name_encoding (str);
+ const char *name = default_strip_name_encoding (str);
/* Strip leading '@' on fastcall symbols. */
if (*name == '@')
return name;
}
-/* Output a reference to a label. Fastcall symbols are prefixed with @,
- whereas symbols for functions using other calling conventions don't
- have a prefix (unless they are marked dllimport or dllexport). */
-
-void i386_pe_output_labelref (FILE *stream, const char *name)
-{
- if (strncmp (name, DLL_IMPORT_PREFIX, strlen (DLL_IMPORT_PREFIX))
- == 0)
- /* A dll import */
- {
- if (name[strlen (DLL_IMPORT_PREFIX)] == FASTCALL_PREFIX)
- /* A dllimport fastcall symbol. */
- {
- fprintf (stream, "__imp_%s",
- i386_pe_strip_name_encoding (name));
- }
- else
- /* A dllimport non-fastcall symbol. */
- {
- fprintf (stream, "__imp__%s",
- i386_pe_strip_name_encoding (name));
- }
- }
- else if ((name[0] == FASTCALL_PREFIX)
- || (strncmp (name, DLL_EXPORT_PREFIX, strlen (DLL_EXPORT_PREFIX)
- == 0
- && name[strlen (DLL_EXPORT_PREFIX)] == FASTCALL_PREFIX)))
- /* A fastcall symbol. */
- {
- fprintf (stream, "%s",
- i386_pe_strip_name_encoding (name));
- }
- else
- /* Everything else. */
- {
- fprintf (stream, "%s%s", USER_LABEL_PREFIX,
- i386_pe_strip_name_encoding (name));
- }
-}
-
void
i386_pe_unique_section (tree decl, int reloc)
{
else
prefix = ".data$";
len = strlen (name) + strlen (prefix);
- string = alloca (len + 1);
+ string = XALLOCAVEC (char, len + 1);
sprintf (string, "%s%s", prefix, name);
DECL_SECTION_NAME (decl) = build_string (len, string);
unsigned int **slot;
/* The names we put in the hashtable will always be the unique
- versions gived to us by the stringtable, so we can just use
+ versions given to us by the stringtable, so we can just use
their addresses as the keys. */
if (!htab)
htab = htab_create (31, htab_hash_pointer, htab_eq_pointer, NULL);
else
{
if (decl && **slot != flags)
- error ("%J'%D' causes a section type conflict", decl, decl);
+ error ("%q+D causes a section type conflict", decl);
}
return flags;
}
void
-i386_pe_asm_named_section (const char *name, unsigned int flags)
+i386_pe_asm_named_section (const char *name, unsigned int flags,
+ tree decl)
{
char flagchars[8], *f = flagchars;
+#if defined (HAVE_GAS_SECTION_EXCLUDE) && HAVE_GAS_SECTION_EXCLUDE == 1
+ if ((flags & SECTION_EXCLUDE) != 0)
+ *f++ = 'e';
+#endif
+
if ((flags & (SECTION_CODE | SECTION_WRITE)) == 0)
/* readonly data */
{
*f++ = 'w';
if (flags & SECTION_PE_SHARED)
*f++ = 's';
+#if !defined (HAVE_GAS_SECTION_EXCLUDE) || HAVE_GAS_SECTION_EXCLUDE == 0
+ /* If attribute "e" isn't supported we mark this section as
+ never-load. */
+ if ((flags & SECTION_EXCLUDE) != 0)
+ *f++ = 'n';
+#endif
}
+ /* LTO sections need 1-byte alignment to avoid confusing the
+ zlib decompression algorithm with trailing zero pad bytes. */
+ if (strncmp (name, LTO_SECTION_NAME_PREFIX,
+ strlen (LTO_SECTION_NAME_PREFIX)) == 0)
+ *f++ = '0';
+
*f = '\0';
fprintf (asm_out_file, "\t.section\t%s,\"%s\"\n", name, flagchars);
if (flags & SECTION_LINKONCE)
{
/* Functions may have been compiled at various levels of
- optimization so we can't use `same_size' here.
- Instead, have the linker pick one. */
+ optimization so we can't use `same_size' here.
+ Instead, have the linker pick one, without warning.
+ If 'selectany' attribute has been specified, MS compiler
+ sets 'discard' characteristic, rather than telling linker
+ to warn of size or content mismatch, so do the same. */
+ bool discard = (flags & SECTION_CODE)
+ || lookup_attribute ("selectany",
+ DECL_ATTRIBUTES (decl));
fprintf (asm_out_file, "\t.linkonce %s\n",
- (flags & SECTION_CODE ? "discard" : "same_size"));
+ (discard ? "discard" : "same_size"));
}
}
+
+/* Beware, DECL may be NULL if compile_file() is emitting the LTO marker. */
+
+void
+i386_pe_asm_output_aligned_decl_common (FILE *stream, tree decl,
+ const char *name, HOST_WIDE_INT size,
+ HOST_WIDE_INT align ATTRIBUTE_UNUSED)
+{
+ HOST_WIDE_INT rounded;
+
+ /* Compute as in assemble_noswitch_variable, since we don't have
+ support for aligned common on older binutils. We must also
+ avoid emitting a common symbol of size zero, as this is the
+ overloaded representation that indicates an undefined external
+ symbol in the PE object file format. */
+ rounded = size ? size : 1;
+ rounded += (BIGGEST_ALIGNMENT / BITS_PER_UNIT) - 1;
+ rounded = (rounded / (BIGGEST_ALIGNMENT / BITS_PER_UNIT)
+ * (BIGGEST_ALIGNMENT / BITS_PER_UNIT));
+
+ i386_pe_maybe_record_exported_symbol (decl, name, 1);
+
+ fprintf (stream, "\t.comm\t");
+ assemble_name (stream, name);
+ if (use_pe_aligned_common)
+ fprintf (stream, ", " HOST_WIDE_INT_PRINT_DEC ", %d\n",
+ size ? size : (HOST_WIDE_INT) 1,
+ exact_log2 (align) - exact_log2 (CHAR_BIT));
+ else
+ fprintf (stream, ", " HOST_WIDE_INT_PRINT_DEC "\t" ASM_COMMENT_START
+ " " HOST_WIDE_INT_PRINT_DEC "\n", rounded, size);
+}
\f
/* The Microsoft linker requires that every function be marked as
DT_FCN. When using gas on cygwin, we must emit appropriate .type
/* Mark a function appropriately. This should only be called for
functions for which we are not emitting COFF debugging information.
FILE is the assembler output file, NAME is the name of the
- function, and PUBLIC is nonzero if the function is globally
+ function, and PUB is nonzero if the function is globally
visible. */
void
-i386_pe_declare_function_type (FILE *file, const char *name, int public)
+i386_pe_declare_function_type (FILE *file, const char *name, int pub)
{
fprintf (file, "\t.def\t");
assemble_name (file, name);
fprintf (file, ";\t.scl\t%d;\t.type\t%d;\t.endef\n",
- public ? (int) C_EXT : (int) C_STAT,
+ pub ? (int) C_EXT : (int) C_STAT,
(int) DT_FCN << N_BTSHFT);
}
/* Keep a list of external functions. */
-struct extern_list
+struct GTY(()) extern_list
{
struct extern_list *next;
+ tree decl;
const char *name;
};
-static struct extern_list *extern_head;
+static GTY(()) struct extern_list *extern_head;
/* Assemble an external function reference. We need to keep a list of
these, so that we can output the function types at the end of the
for it then. */
void
-i386_pe_record_external_function (const char *name)
+i386_pe_record_external_function (tree decl, const char *name)
{
struct extern_list *p;
- p = (struct extern_list *) xmalloc (sizeof *p);
+ p = ggc_alloc_extern_list ();
p->next = extern_head;
+ p->decl = decl;
p->name = name;
extern_head = p;
}
/* Keep a list of exported symbols. */
-struct export_list
+struct GTY(()) export_list
{
struct export_list *next;
const char *name;
int is_data; /* used to type tag exported symbols. */
};
-static struct export_list *export_head;
+static GTY(()) struct export_list *export_head;
/* Assemble an export symbol entry. We need to keep a list of
these, so that we can output the export list at the end of the
assembly. We used to output these export symbols in each function,
but that causes problems with GNU ld when the sections are
- linkonce. */
+ linkonce. Beware, DECL may be NULL if compile_file() is emitting
+ the LTO marker. */
void
-i386_pe_record_exported_symbol (const char *name, int is_data)
+i386_pe_maybe_record_exported_symbol (tree decl, const char *name, int is_data)
{
+ rtx symbol;
struct export_list *p;
- p = (struct export_list *) xmalloc (sizeof *p);
+ if (!decl)
+ return;
+
+ symbol = XEXP (DECL_RTL (decl), 0);
+ gcc_assert (GET_CODE (symbol) == SYMBOL_REF);
+ if (!SYMBOL_REF_DLLEXPORT_P (symbol))
+ return;
+
+ gcc_assert (TREE_PUBLIC (decl));
+
+ p = ggc_alloc_export_list ();
p->next = export_head;
p->name = name;
p->is_data = is_data;
export_head = p;
}
+#ifdef CXX_WRAP_SPEC_LIST
+
+/* Hash table equality helper function. */
+
+static int
+wrapper_strcmp (const void *x, const void *y)
+{
+ return !strcmp ((const char *) x, (const char *) y);
+}
+
+/* Search for a function named TARGET in the list of library wrappers
+ we are using, returning a pointer to it if found or NULL if not.
+ This function might be called on quite a few symbols, and we only
+ have the list of names of wrapped functions available to us as a
+ spec string, so first time round we lazily initialise a hash table
+ to make things quicker. */
+
+static const char *
+i386_find_on_wrapper_list (const char *target)
+{
+ static char first_time = 1;
+ static htab_t wrappers;
+
+ if (first_time)
+ {
+ /* Beware that this is not a complicated parser, it assumes
+ that any sequence of non-whitespace beginning with an
+ underscore is one of the wrapped symbols. For now that's
+ adequate to distinguish symbols from spec substitutions
+ and command-line options. */
+ static char wrapper_list_buffer[] = CXX_WRAP_SPEC_LIST;
+ char *bufptr;
+ /* Breaks up the char array into separated strings
+ strings and enter them into the hash table. */
+ wrappers = htab_create_alloc (8, htab_hash_string, wrapper_strcmp,
+ 0, xcalloc, free);
+ for (bufptr = wrapper_list_buffer; *bufptr; ++bufptr)
+ {
+ char *found = NULL;
+ if (ISSPACE (*bufptr))
+ continue;
+ if (*bufptr == '_')
+ found = bufptr;
+ while (*bufptr && !ISSPACE (*bufptr))
+ ++bufptr;
+ if (*bufptr)
+ *bufptr = 0;
+ if (found)
+ *htab_find_slot (wrappers, found, INSERT) = found;
+ }
+ first_time = 0;
+ }
+
+ return (const char *) htab_find (wrappers, target);
+}
+
+#endif /* CXX_WRAP_SPEC_LIST */
+
/* This is called at the end of assembly. For each external function
which has not been defined, we output a declaration now. We also
output the .drectve section. */
{
struct extern_list *p;
- ix86_file_end ();
-
for (p = extern_head; p != NULL; p = p->next)
{
tree decl;
- decl = get_identifier (p->name);
+ decl = p->decl;
/* Positively ensure only one declaration for any given symbol. */
- if (! TREE_ASM_WRITTEN (decl) && TREE_SYMBOL_REFERENCED (decl))
+ if (! TREE_ASM_WRITTEN (decl)
+ && TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
{
+#ifdef CXX_WRAP_SPEC_LIST
+ /* To ensure the DLL that provides the corresponding real
+ functions is still loaded at runtime, we must reference
+ the real function so that an (unused) import is created. */
+ const char *realsym = i386_find_on_wrapper_list (p->name);
+ if (realsym)
+ i386_pe_declare_function_type (asm_out_file,
+ concat ("__real_", realsym, NULL), TREE_PUBLIC (decl));
+#endif /* CXX_WRAP_SPEC_LIST */
TREE_ASM_WRITTEN (decl) = 1;
i386_pe_declare_function_type (asm_out_file, p->name,
TREE_PUBLIC (decl));
drectve_section ();
for (q = export_head; q != NULL; q = q->next)
{
- fprintf (asm_out_file, "\t.ascii \" -export:%s%s\"\n",
- i386_pe_strip_name_encoding (q->name),
- (q->is_data) ? ",data" : "");
+ fprintf (asm_out_file, "\t.ascii \" -export:\\\"%s\\\"%s\"\n",
+ default_strip_name_encoding (q->name),
+ (q->is_data ? ",data" : ""));
}
}
}
+
+\f
+/* x64 Structured Exception Handling unwind info. */
+
+struct seh_frame_state
+{
+ /* SEH records saves relative to the "current" stack pointer, whether
+ or not there's a frame pointer in place. This tracks the current
+ stack pointer offset from the CFA. */
+ HOST_WIDE_INT sp_offset;
+
+ /* The CFA is located at CFA_REG + CFA_OFFSET. */
+ HOST_WIDE_INT cfa_offset;
+ rtx cfa_reg;
+};
+
+/* Set up data structures beginning output for SEH. */
+
+void
+i386_pe_seh_init (FILE *f)
+{
+ struct seh_frame_state *seh;
+
+ if (!TARGET_SEH)
+ return;
+ if (cfun->is_thunk)
+ return;
+
+ /* We cannot support DRAP with SEH. We turned off support for it by
+ re-defining MAX_STACK_ALIGNMENT when SEH is enabled. */
+ gcc_assert (!stack_realign_drap);
+
+ seh = XCNEW (struct seh_frame_state);
+ cfun->machine->seh = seh;
+
+ seh->sp_offset = INCOMING_FRAME_SP_OFFSET;
+ seh->cfa_offset = INCOMING_FRAME_SP_OFFSET;
+ seh->cfa_reg = stack_pointer_rtx;
+
+ fputs ("\t.seh_proc\t", f);
+ assemble_name (f, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (cfun->decl)));
+ fputc ('\n', f);
+}
+
+void
+i386_pe_seh_end_prologue (FILE *f)
+{
+ struct seh_frame_state *seh;
+
+ if (!TARGET_SEH)
+ return;
+ if (cfun->is_thunk)
+ return;
+ seh = cfun->machine->seh;
+
+ /* Emit an assembler directive to set up the frame pointer. Always do
+ this last. The documentation talks about doing this "before" any
+ other code that uses offsets, but (experimentally) that's after we
+ emit the codes in reverse order (handled by the assembler). */
+ if (seh->cfa_reg != stack_pointer_rtx)
+ {
+ HOST_WIDE_INT offset = seh->sp_offset - seh->cfa_offset;
+
+ gcc_assert ((offset & 15) == 0);
+ gcc_assert (IN_RANGE (offset, 0, 240));
+
+ fputs ("\t.seh_setframe\t", f);
+ print_reg (seh->cfa_reg, 0, f);
+ fprintf (f, ", " HOST_WIDE_INT_PRINT_DEC "\n", offset);
+ }
+
+ XDELETE (seh);
+ cfun->machine->seh = NULL;
+
+ fputs ("\t.seh_endprologue\n", f);
+}
+
+static void
+i386_pe_seh_fini (FILE *f)
+{
+ if (!TARGET_SEH)
+ return;
+ if (cfun->is_thunk)
+ return;
+ fputs ("\t.seh_endproc\n", f);
+}
+
+/* Emit an assembler directive to save REG via a PUSH. */
+
+static void
+seh_emit_push (FILE *f, struct seh_frame_state *seh, rtx reg)
+{
+ unsigned int regno = REGNO (reg);
+
+ gcc_checking_assert (GENERAL_REGNO_P (regno));
+
+ seh->sp_offset += UNITS_PER_WORD;
+ if (seh->cfa_reg == stack_pointer_rtx)
+ seh->cfa_offset += UNITS_PER_WORD;
+
+ fputs ("\t.seh_pushreg\t", f);
+ print_reg (reg, 0, f);
+ fputc ('\n', f);
+}
+
+/* Emit an assembler directive to save REG at CFA - CFA_OFFSET. */
+
+static void
+seh_emit_save (FILE *f, struct seh_frame_state *seh,
+ rtx reg, HOST_WIDE_INT cfa_offset)
+{
+ unsigned int regno = REGNO (reg);
+ HOST_WIDE_INT offset;
+
+ /* Negative save offsets are of course not supported, since that
+ would be a store below the stack pointer and thus clobberable. */
+ gcc_assert (seh->sp_offset >= cfa_offset);
+ offset = seh->sp_offset - cfa_offset;
+
+ fputs ((SSE_REGNO_P (regno) ? "\t.seh_savexmm\t"
+ : GENERAL_REGNO_P (regno) ? "\t.seh_savereg\t"
+ : (gcc_unreachable (), "")), f);
+ print_reg (reg, 0, f);
+ fprintf (f, ", " HOST_WIDE_INT_PRINT_DEC "\n", offset);
+}
+
+/* Emit an assembler directive to adjust RSP by OFFSET. */
+
+static void
+seh_emit_stackalloc (FILE *f, struct seh_frame_state *seh,
+ HOST_WIDE_INT offset)
+{
+ /* We're only concerned with prologue stack allocations, which all
+ are subtractions from the stack pointer. */
+ gcc_assert (offset < 0);
+ offset = -offset;
+
+ if (seh->cfa_reg == stack_pointer_rtx)
+ seh->cfa_offset += offset;
+ seh->sp_offset += offset;
+
+ fprintf (f, "\t.seh_stackalloc\t" HOST_WIDE_INT_PRINT_DEC "\n", offset);
+}
+
+/* Process REG_CFA_ADJUST_CFA for SEH. */
+
+static void
+seh_cfa_adjust_cfa (FILE *f, struct seh_frame_state *seh, rtx pat)
+{
+ rtx dest, src;
+ HOST_WIDE_INT reg_offset = 0;
+ unsigned int dest_regno;
+
+ dest = SET_DEST (pat);
+ src = SET_SRC (pat);
+
+ if (GET_CODE (src) == PLUS)
+ {
+ reg_offset = INTVAL (XEXP (src, 1));
+ src = XEXP (src, 0);
+ }
+ else if (GET_CODE (src) == MINUS)
+ {
+ reg_offset = -INTVAL (XEXP (src, 1));
+ src = XEXP (src, 0);
+ }
+ gcc_assert (src == stack_pointer_rtx);
+ gcc_assert (seh->cfa_reg == stack_pointer_rtx);
+ dest_regno = REGNO (dest);
+
+ if (dest_regno == STACK_POINTER_REGNUM)
+ seh_emit_stackalloc (f, seh, reg_offset);
+ else if (dest_regno == HARD_FRAME_POINTER_REGNUM)
+ {
+ seh->cfa_reg = dest;
+ seh->cfa_offset -= reg_offset;
+ }
+ else
+ gcc_unreachable ();
+}
+
+/* Process REG_CFA_OFFSET for SEH. */
+
+static void
+seh_cfa_offset (FILE *f, struct seh_frame_state *seh, rtx pat)
+{
+ rtx dest, src;
+ HOST_WIDE_INT reg_offset;
+
+ dest = SET_DEST (pat);
+ src = SET_SRC (pat);
+
+ gcc_assert (MEM_P (dest));
+ dest = XEXP (dest, 0);
+ if (REG_P (dest))
+ reg_offset = 0;
+ else
+ {
+ gcc_assert (GET_CODE (dest) == PLUS);
+ reg_offset = INTVAL (XEXP (dest, 1));
+ dest = XEXP (dest, 0);
+ }
+ gcc_assert (dest == seh->cfa_reg);
+
+ seh_emit_save (f, seh, src, seh->cfa_offset - reg_offset);
+}
+
+/* Process a FRAME_RELATED_EXPR for SEH. */
+
+static void
+seh_frame_related_expr (FILE *f, struct seh_frame_state *seh, rtx pat)
+{
+ rtx dest, src;
+ HOST_WIDE_INT addend;
+
+ /* See the full loop in dwarf2out_frame_debug_expr. */
+ if (GET_CODE (pat) == PARALLEL || GET_CODE (pat) == SEQUENCE)
+ {
+ int i, n = XVECLEN (pat, 0), pass, npass;
+
+ npass = (GET_CODE (pat) == PARALLEL ? 2 : 1);
+ for (pass = 0; pass < npass; ++pass)
+ for (i = 0; i < n; ++i)
+ {
+ rtx ele = XVECEXP (pat, 0, i);
+
+ if (GET_CODE (ele) != SET)
+ continue;
+ dest = SET_DEST (ele);
+
+ /* Process each member of the PARALLEL independently. The first
+ member is always processed; others only if they are marked. */
+ if (i == 0 || RTX_FRAME_RELATED_P (ele))
+ {
+ /* Evaluate all register saves in the first pass and all
+ register updates in the second pass. */
+ if ((MEM_P (dest) ^ pass) || npass == 1)
+ seh_frame_related_expr (f, seh, ele);
+ }
+ }
+ return;
+ }
+
+ dest = SET_DEST (pat);
+ src = SET_SRC (pat);
+
+ switch (GET_CODE (dest))
+ {
+ case REG:
+ switch (GET_CODE (src))
+ {
+ case REG:
+ /* REG = REG: This should be establishing a frame pointer. */
+ gcc_assert (src == stack_pointer_rtx);
+ gcc_assert (dest == hard_frame_pointer_rtx);
+ seh_cfa_adjust_cfa (f, seh, pat);
+ break;
+
+ case PLUS:
+ addend = INTVAL (XEXP (src, 1));
+ src = XEXP (src, 0);
+ if (dest == hard_frame_pointer_rtx)
+ seh_cfa_adjust_cfa (f, seh, pat);
+ else if (dest == stack_pointer_rtx)
+ {
+ gcc_assert (src == stack_pointer_rtx);
+ seh_emit_stackalloc (f, seh, addend);
+ }
+ else
+ gcc_unreachable ();
+ break;
+
+ default:
+ gcc_unreachable ();
+ }
+ break;
+
+ case MEM:
+ /* A save of some kind. */
+ dest = XEXP (dest, 0);
+ if (GET_CODE (dest) == PRE_DEC)
+ {
+ gcc_checking_assert (GET_MODE (src) == Pmode);
+ gcc_checking_assert (REG_P (src));
+ seh_emit_push (f, seh, src);
+ }
+ else
+ seh_cfa_offset (f, seh, pat);
+ break;
+
+ default:
+ gcc_unreachable ();
+ }
+}
+
+/* This function looks at a single insn and emits any SEH directives
+ required for unwind of this insn. */
+
+void
+i386_pe_seh_unwind_emit (FILE *asm_out_file, rtx insn)
+{
+ rtx note, pat;
+ bool handled_one = false;
+ struct seh_frame_state *seh;
+
+ if (!TARGET_SEH)
+ return;
+
+ /* We free the SEH data once done with the prologue. Ignore those
+ RTX_FRAME_RELATED_P insns that are associated with the epilogue. */
+ seh = cfun->machine->seh;
+ if (seh == NULL)
+ return;
+
+ if (NOTE_P (insn) || !RTX_FRAME_RELATED_P (insn))
+ return;
+
+ for (note = REG_NOTES (insn); note ; note = XEXP (note, 1))
+ {
+ pat = XEXP (note, 0);
+ switch (REG_NOTE_KIND (note))
+ {
+ case REG_FRAME_RELATED_EXPR:
+ goto found;
+
+ case REG_CFA_DEF_CFA:
+ case REG_CFA_EXPRESSION:
+ /* Only emitted with DRAP, which we disable. */
+ gcc_unreachable ();
+ break;
+
+ case REG_CFA_REGISTER:
+ /* Only emitted in epilogues, which we skip. */
+ gcc_unreachable ();
+
+ case REG_CFA_ADJUST_CFA:
+ if (pat == NULL)
+ {
+ pat = PATTERN (insn);
+ if (GET_CODE (pat) == PARALLEL)
+ pat = XVECEXP (pat, 0, 0);
+ }
+ seh_cfa_adjust_cfa (asm_out_file, seh, pat);
+ handled_one = true;
+ break;
+
+ case REG_CFA_OFFSET:
+ if (pat == NULL)
+ pat = single_set (insn);
+ seh_cfa_offset (asm_out_file, seh, pat);
+ handled_one = true;
+ break;
+
+ default:
+ break;
+ }
+ }
+ if (handled_one)
+ return;
+ pat = PATTERN (insn);
+ found:
+ seh_frame_related_expr (asm_out_file, seh, pat);
+}
+\f
+void
+i386_pe_start_function (FILE *f, const char *name, tree decl)
+{
+ i386_pe_maybe_record_exported_symbol (decl, name, 0);
+ if (write_symbols != SDB_DEBUG)
+ i386_pe_declare_function_type (f, name, TREE_PUBLIC (decl));
+ /* In case section was altered by debugging output. */
+ if (decl != NULL_TREE)
+ switch_to_section (function_section (decl));
+ ASM_OUTPUT_FUNCTION_LABEL (f, name, decl);
+}
+
+void
+i386_pe_end_function (FILE *f, const char *name ATTRIBUTE_UNUSED,
+ tree decl ATTRIBUTE_UNUSED)
+{
+ i386_pe_seh_fini (f);
+}
+\f
+
+#include "gt-winnt.h"
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