/* 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, 2005
- 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, 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "tm_p.h"
#include "toplev.h"
#include "hashtab.h"
+#include "langhooks.h"
#include "ggc.h"
+#include "target.h"
+#include "lto-streamer.h"
/* i386/PE specific attribute support.
multiple times.
*/
-static tree associated_type (tree);
-static tree gen_stdcall_or_fastcall_suffix (tree, bool);
-static bool i386_pe_dllexport_p (tree);
-static bool 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 "shared" attribute;
arguments as in struct attribute_spec.handler. */
tree
{
if (TREE_CODE (*node) != VAR_DECL)
{
- warning (OPT_Wattributes, "%qs attribute only applies to variables",
- IDENTIFIER_POINTER (name));
+ warning (OPT_Wattributes, "%qE attribute only applies to variables",
+ name);
*no_add_attrs = true;
}
bool *no_add_attrs)
{
/* The attribute applies only to objects that are initialized and have
- external linkage, */
- if (TREE_CODE (*node) == VAR_DECL && TREE_PUBLIC (*node)
- && (DECL_INITIAL (*node)
- /* 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 (*node))))
- make_decl_one_only (*node);
- else
+ 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 ("%qs attribute applies only to initialized variables"
- " with external linkage", IDENTIFIER_POINTER (name));
+ error ("%qE attribute applies only to initialized variables"
+ " with external linkage", name);
*no_add_attrs = true;
}
static tree
associated_type (tree decl)
{
- return (DECL_CONTEXT (decl) && TYPE_P (DECL_CONTEXT (decl)))
- ? DECL_CONTEXT (decl) : NULL_TREE;
+ return (DECL_CONTEXT (decl) && TYPE_P (DECL_CONTEXT (decl))
+ ? DECL_CONTEXT (decl) : NULL_TREE);
}
-
-/* Return true if DECL is a dllexport'd object. */
+/* Return true if DECL should be a dllexport'd object. */
static bool
-i386_pe_dllexport_p (tree decl)
+i386_pe_determine_dllexport_p (tree decl)
{
- if (TREE_CODE (decl) != VAR_DECL
- && TREE_CODE (decl) != FUNCTION_DECL)
+ if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != FUNCTION_DECL)
+ return false;
+
+ /* Don't export local clones of dllexports. */
+ if (!TREE_PUBLIC (decl))
return false;
if (lookup_attribute ("dllexport", DECL_ATTRIBUTES (decl)))
return true;
- /* Also mark class members of exported classes with dllexport. */
- if (associated_type (decl)
- && lookup_attribute ("dllexport",
- TYPE_ATTRIBUTES (associated_type (decl))))
- return i386_pe_type_dllexport_p (decl);
-
return false;
}
+/* Return true if DECL should be a dllimport'd object. */
+
static bool
-i386_pe_dllimport_p (tree decl)
+i386_pe_determine_dllimport_p (tree decl)
{
- if (TREE_CODE (decl) != VAR_DECL
- && TREE_CODE (decl) != FUNCTION_DECL)
+ tree assoc;
+
+ if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != FUNCTION_DECL)
return false;
- /* Lookup the attribute rather than rely on the DECL_DLLIMPORT_P flag.
- We may need to override an earlier decision. */
- if (lookup_attribute ("dllimport", DECL_ATTRIBUTES (decl)))
+ 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
- warnings if the class attribute has been overriden by an
- out-of-class definition. */
- if (associated_type (decl)
- && lookup_attribute ("dllimport",
- TYPE_ATTRIBUTES (associated_type (decl))))
- return i386_pe_type_dllimport_p (decl);
+ 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;
}
/* Handle the -mno-fun-dllimport target switch. */
+
bool
-i386_pe_valid_dllimport_attribute_p (tree decl)
+i386_pe_valid_dllimport_attribute_p (const_tree decl)
{
if (TARGET_NOP_FUN_DLLIMPORT && TREE_CODE (decl) == FUNCTION_DECL)
return false;
return true;
}
-/* Return nonzero if SYMBOL is marked as being dllexport'd. */
+/* 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. */
-int
-i386_pe_dllexport_name_p (const char *symbol)
+static tree
+gen_stdcall_or_fastcall_suffix (tree decl, tree id, bool fastcall)
{
- return (strncmp (DLL_EXPORT_PREFIX, symbol,
- strlen (DLL_EXPORT_PREFIX)) == 0);
-}
+ 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);
+ tree arg;
+ function_args_iterator args_iter;
-/* Return nonzero if SYMBOL is marked as being dllimport'd. */
+ gcc_assert (TREE_CODE (decl) == FUNCTION_DECL);
-int
-i386_pe_dllimport_name_p (const char *symbol)
-{
- return (strncmp (DLL_IMPORT_PREFIX, symbol,
- strlen (DLL_IMPORT_PREFIX)) == 0);
-}
+ if (prototype_p (type))
+ {
+ /* This attribute is ignored for variadic functions. */
+ if (stdarg_p (type))
+ return NULL_TREE;
-/* Mark a DECL as being dllexport'd.
- Note that we override the previous setting (e.g.: dllimport). */
+ /* 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)
+ {
+ HOST_WIDE_INT parm_size;
+ HOST_WIDE_INT parm_boundary_bytes = PARM_BOUNDARY / BITS_PER_UNIT;
-static void
-i386_pe_mark_dllexport (tree decl)
-{
- const char *oldname;
- char *newname;
- rtx rtlname;
- rtx symref;
- tree idp;
-
- rtlname = XEXP (DECL_RTL (decl), 0);
- if (GET_CODE (rtlname) == MEM)
- rtlname = XEXP (rtlname, 0);
- gcc_assert (GET_CODE (rtlname) == SYMBOL_REF);
- oldname = XSTR (rtlname, 0);
- if (i386_pe_dllimport_name_p (oldname))
- {
- warning (0, "inconsistent dll linkage for %q+D, dllexport assumed",
- decl);
- /* Remove DLL_IMPORT_PREFIX. */
- oldname += strlen (DLL_IMPORT_PREFIX);
- }
- else if (i386_pe_dllexport_name_p (oldname))
- return; /* already done */
+ if (! COMPLETE_TYPE_P (arg))
+ break;
- newname = alloca (strlen (DLL_EXPORT_PREFIX) + strlen (oldname) + 1);
- sprintf (newname, "%s%s", DLL_EXPORT_PREFIX, oldname);
+ parm_size = int_size_in_bytes (arg);
+ if (parm_size < 0)
+ break;
- /* 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);
+ /* 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;
+ }
+ }
+ /* 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);
- symref = gen_rtx_SYMBOL_REF (Pmode, IDENTIFIER_POINTER (idp));
- SYMBOL_REF_DECL (symref) = decl;
- XEXP (DECL_RTL (decl), 0) = symref;
+ return get_identifier (new_str);
}
-/* Mark a DECL 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. */
-static void
-i386_pe_mark_dllimport (tree decl)
+static tree
+i386_pe_maybe_mangle_decl_assembler_name (tree decl, tree id)
{
- const char *oldname;
- char *newname;
- tree idp;
- rtx rtlname, newrtl;
- rtx symref;
-
- rtlname = XEXP (DECL_RTL (decl), 0);
- if (GET_CODE (rtlname) == MEM)
- rtlname = XEXP (rtlname, 0);
- gcc_assert (GET_CODE (rtlname) == SYMBOL_REF);
- oldname = XSTR (rtlname, 0);
- if (i386_pe_dllexport_name_p (oldname))
- {
- error ("%qs 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. */
- gcc_assert (DECL_EXTERNAL (decl) && TREE_PUBLIC (decl)
- && DECL_DLLIMPORT_P (decl));
- return;
- }
+ tree new_id = NULL_TREE;
- 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);
-
- symref = gen_rtx_SYMBOL_REF (Pmode, IDENTIFIER_POINTER (idp));
- SYMBOL_REF_DECL (symref) = decl;
- newrtl = gen_rtx_MEM (Pmode,symref);
- XEXP (DECL_RTL (decl), 0) = newrtl;
+ if (TREE_CODE (decl) == FUNCTION_DECL)
+ {
+ tree type_attributes = TYPE_ATTRIBUTES (TREE_TYPE (decl));
+ if (lookup_attribute ("stdcall", type_attributes))
+ new_id = gen_stdcall_or_fastcall_suffix (decl, id, false);
+ else if (lookup_attribute ("fastcall", type_attributes))
+ new_id = gen_stdcall_or_fastcall_suffix (decl, id, true);
+ }
- DECL_DLLIMPORT_P (decl) = 1;
+ return new_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. If FASTCALL is true, also add the FASTCALL_PREFIX. */
-
-static tree
-gen_stdcall_or_fastcall_suffix (tree decl, bool fastcall)
+/* 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)
{
- 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;
- char *p;
- tree formal_type;
-
- /* Do not change the identifier if a verbatim asmspec or already done. */
- if (*asmname == '*' || strchr (asmname, '@'))
- return DECL_ASSEMBLER_NAME (decl);
-
- formal_type = TYPE_ARG_TYPES (TREE_TYPE (decl));
- if (formal_type != NULL_TREE)
- {
- /* These attributes are ignored for variadic functions in
- i386.c:ix86_return_pops_args. For compatibility with MS
- compiler do not add @0 suffix here. */
- if (TREE_VALUE (tree_last (formal_type)) != void_type_node)
- return DECL_ASSEMBLER_NAME (decl);
+ tree new_id = i386_pe_maybe_mangle_decl_assembler_name (decl, id);
- /* 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 = alloca (1 + strlen (asmname) + 1 + 8 + 1);
- p = newsym;
- if (fastcall)
- *p++ = FASTCALL_PREFIX;
- sprintf (p, "%s@%d", asmname, total/BITS_PER_UNIT);
- return get_identifier (newsym);
+ return (new_id ? new_id : id);
}
void
i386_pe_encode_section_info (tree decl, rtx rtl, int first)
{
+ rtx symbol;
+ int flags;
+
+ /* Do this last, due to our frobbing of DECL_DLLIMPORT_P above. */
default_encode_section_info (decl, rtl, first);
- if (first && TREE_CODE (decl) == FUNCTION_DECL)
+ /* Careful not to prod global register variables. */
+ if (!MEM_P (rtl))
+ return;
+
+ symbol = XEXP (rtl, 0);
+ gcc_assert (GET_CODE (symbol) == SYMBOL_REF);
+
+ switch (TREE_CODE (decl))
{
- tree type_attributes = TYPE_ATTRIBUTES (TREE_TYPE (decl));
- tree newid = NULL_TREE;
+ 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;
- if (lookup_attribute ("stdcall", type_attributes))
- newid = gen_stdcall_or_fastcall_suffix (decl, false);
- else if (lookup_attribute ("fastcall", type_attributes))
- newid = gen_stdcall_or_fastcall_suffix (decl, true);
- if (newid != NULL_TREE)
+ case VAR_DECL:
+ if (lookup_attribute ("selectany", DECL_ATTRIBUTES (decl)))
{
- rtx rtlname = XEXP (rtl, 0);
- if (GET_CODE (rtlname) == MEM)
- rtlname = XEXP (rtlname, 0);
- XSTR (rtlname, 0) = IDENTIFIER_POINTER (newid);
- /* These attributes must be present on first declaration,
- change_decl_assembler_name will warn if they are added
- later and the decl has been referenced, but duplicate_decls
- should catch the mismatch before this is called. */
- change_decl_assembler_name (decl, newid);
+ 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;
+
+ default:
+ return;
}
/* 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. */
-
- 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 been declared as dllimport, but a
- subsequent definition nullified that. Assert that
- tree.c: merge_dllimport_decl_attributes has removed the attribute
- before the RTL name was marked with the DLL_IMPORT_PREFIX. */
- else
- gcc_assert (!((TREE_CODE (decl) == FUNCTION_DECL
- || TREE_CODE (decl) == VAR_DECL)
- && rtl != NULL_RTX
- && GET_CODE (rtl) == MEM
- && GET_CODE (XEXP (rtl, 0)) == MEM
- && GET_CODE (XEXP (XEXP (rtl, 0), 0)) == SYMBOL_REF
- && i386_pe_dllimport_name_p (XSTR (XEXP (XEXP (rtl, 0), 0), 0))));
+ 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;
}
-/* Strip only the leading encoding, leaving the stdcall suffix and fastcall
- prefix if it exists. */
-
-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))
+ /* But x64 gets confused and attempts to use unsupported GOTPCREL
+ relocations if we tell it the truth, so we still return true in
+ that case until the deeper problem can be fixed. */
+ return (TARGET_64BIT && DEFAULT_ABI == MS_ABI);
+
+ 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);
flags = SECTION_CODE;
else if (decl && decl_readonly_section (decl, reloc))
flags = 0;
+ else if (current_function_decl
+ && cfun
+ && crtl->subsections.unlikely_text_section_name
+ && strcmp (name, crtl->subsections.unlikely_text_section_name) == 0)
+ flags = SECTION_CODE;
+ else if (!decl
+ && (!current_function_decl || !cfun)
+ && strcmp (name, UNLIKELY_EXECUTED_TEXT_SECTION_NAME) == 0)
+ flags = SECTION_CODE;
else
{
flags = SECTION_WRITE;
*f++ = 's';
}
+ /* 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);
(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 GTY(())
+struct GTY(()) extern_list
{
struct extern_list *next;
tree decl;
/* Keep a list of exported symbols. */
-struct export_list GTY(())
+struct GTY(()) export_list
{
struct export_list *next;
const char *name;
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;
+ 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 = (struct export_list *) ggc_alloc (sizeof *p);
p->next = export_head;
p->name = name;
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;
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));
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" : "");
+ default_strip_name_encoding (q->name),
+ (q->is_data ? ",data" : ""));
}
}
}
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