/* 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, 2006, 2007 Free Software Foundation, Inc.
+ 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
This file is part of GCC.
#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.
{
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;
}
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 bool
i386_pe_determine_dllexport_p (tree decl)
{
- tree assoc;
-
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. */
- assoc = associated_type (decl);
- if (assoc && lookup_attribute ("dllexport", TYPE_ATTRIBUTES (assoc)))
- return i386_pe_type_dllexport_p (decl);
-
return false;
}
if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != FUNCTION_DECL)
return false;
- /* Lookup the attribute in addition to checking the DECL_DLLIMPORT_P flag.
- We may need to override an earlier decision. */
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 overridden by an
- out-of-class definition. */
+ 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)))
- return i386_pe_type_dllimport_p (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;
}
}
}
/* Assume max of 8 base 10 digits in the suffix. */
- p = new_str = alloca (1 + strlen (old_str) + 1 + 8 + 1);
+ 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);
switch (TREE_CODE (decl))
{
case FUNCTION_DECL:
- if (first)
+ /* 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)
{
- /* FIXME: In Ada, and perhaps other language frontends,
- imported stdcall names may not yet have been modified.
- Check and do it know. */
- 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
+ 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, '@'))
- break;
- if ((new_id = i386_pe_maybe_mangle_decl_assembler_name (decl, old_id)))
- {
- /* 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 first. */
- change_decl_assembler_name (decl, new_id);
- XSTR (symbol, 0) = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
- }
+ 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;
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);
+ make_decl_one_only (decl, DECL_ASSEMBLER_NAME (decl));
else
error ("%q+D:'selectany' attribute applies only to "
"initialized objects", decl);
if (i386_pe_determine_dllexport_p (decl))
flags |= SYMBOL_FLAG_DLLEXPORT;
else if (i386_pe_determine_dllimport_p (decl))
- {
- flags |= SYMBOL_FLAG_DLLIMPORT;
- /* If we went through the associated_type path, this won't already
- be set. Though, frankly, this seems wrong, and should be fixed
- elsewhere. */
- if (!DECL_DLLIMPORT_P (decl))
- {
- DECL_DLLIMPORT_P (decl) = 1;
- flags &= ~SYMBOL_FLAG_LOCAL;
- }
- }
+ flags |= SYMBOL_FLAG_DLLIMPORT;
+
SYMBOL_REF_FLAGS (symbol) = flags;
}
&& 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;
}
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);
*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);
}
}
+/* 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 rounded;
- /* Compute as in assemble_noswitch_variable, since we don't actually
- support aligned common. */
+ /* 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)
fprintf (stream, "\t.comm\t");
assemble_name (stream, name);
- fprintf (stream, ", " HOST_WIDE_INT_PRINT_DEC "\t" ASM_COMMENT_START
- " " HOST_WIDE_INT_PRINT_DEC "\n",
- rounded, size);
+ 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
/* 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_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));
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