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[/] [openrisc/] [tags/] [gnu-src/] [gcc-4.5.1/] [gcc-4.5.1-or32-1.0rc2/] [gcc/] [config/] [arm/] [pe.c] - Rev 492
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/* Routines for GCC for ARM/pe. Copyright (C) 1995, 1996, 2000, 2001, 2002, 2004, 2005, 2007, 2008 Free Software Foundation, Inc. Contributed by Doug Evans (dje@cygnus.com). 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 3, or (at your option) any later version. GCC 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 GCC; see the file COPYING3. If not see <http://www.gnu.org/licenses/>. */ #include "config.h" #include "system.h" #include "coretypes.h" #include "tm.h" #include "rtl.h" #include "output.h" #include "flags.h" #include "tree.h" #include "expr.h" #include "toplev.h" #include "tm_p.h" extern int current_function_anonymous_args; /* Return nonzero if DECL is a dllexport'd object. */ tree current_class_type; /* FIXME */ int arm_dllexport_p (tree decl) { tree exp; if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != FUNCTION_DECL) return 0; exp = lookup_attribute ("dllexport", DECL_ATTRIBUTES (decl)); if (exp) return 1; return 0; } /* Return nonzero if DECL is a dllimport'd object. */ int arm_dllimport_p (tree decl) { tree imp; if (TREE_CODE (decl) == FUNCTION_DECL && TARGET_NOP_FUN_DLLIMPORT) return 0; if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != FUNCTION_DECL) return 0; imp = lookup_attribute ("dllimport", DECL_ATTRIBUTES (decl)); if (imp) return 1; return 0; } /* Return nonzero if SYMBOL is marked as being dllexport'd. */ int arm_dllexport_name_p (const char *symbol) { return symbol[0] == ARM_PE_FLAG_CHAR && symbol[1] == 'e' && symbol[2] == '.'; } /* Return nonzero if SYMBOL is marked as being dllimport'd. */ int arm_dllimport_name_p (const char *symbol) { return symbol[0] == ARM_PE_FLAG_CHAR && symbol[1] == 'i' && symbol[2] == '.'; } /* Mark a DECL as being dllexport'd. Note that we override the previous setting (e.g.: dllimport). */ void arm_mark_dllexport (tree decl) { const char * oldname; char * newname; rtx rtlname; 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 (arm_dllimport_name_p (oldname)) oldname += 9; else if (arm_dllexport_name_p (oldname)) return; /* already done */ newname = XALLOCAVEC (char, strlen (oldname) + 4); sprintf (newname, "%ce.%s", ARM_PE_FLAG_CHAR, 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. */ /* ??? At least I think that's why we do this. */ idp = get_identifier (newname); XEXP (DECL_RTL (decl), 0) = gen_rtx_SYMBOL_REF (Pmode, IDENTIFIER_POINTER (idp)); } /* Mark a DECL as being dllimport'd. */ void arm_mark_dllimport (tree decl) { const char * oldname; char * newname; tree idp; rtx rtlname, newrtl; 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); gcc_assert (!arm_dllexport_name_p (oldname)); if (arm_dllimport_name_p (oldname)) return; /* already done */ /* ??? One can well ask why we're making these checks here, and that would be a good question. */ /* Imported variables can't be initialized. */ if (TREE_CODE (decl) == VAR_DECL && !DECL_VIRTUAL_P (decl) && DECL_INITIAL (decl)) { error ("initialized variable %q+D is marked dllimport", decl); return; } /* Nor can they be static. */ if (TREE_CODE (decl) == VAR_DECL /* ??? Is this test for vtables needed? */ && !DECL_VIRTUAL_P (decl) && 0 /*???*/) { error ("static variable %q+D is marked dllimport", decl); return; } /* `extern' needn't be specified with dllimport. Specify `extern' now and hope for the best. Sigh. */ if (TREE_CODE (decl) == VAR_DECL /* ??? Is this test for vtables needed? */ && !DECL_VIRTUAL_P (decl)) { DECL_EXTERNAL (decl) = 1; TREE_PUBLIC (decl) = 1; } newname = XALLOCAVEC (char, strlen (oldname) + 11); sprintf (newname, "%ci.__imp_%s", ARM_PE_FLAG_CHAR, 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. */ /* ??? At least I think that's why we do this. */ idp = get_identifier (newname); newrtl = gen_rtx_MEM (Pmode, gen_rtx_SYMBOL_REF (Pmode, IDENTIFIER_POINTER (idp))); XEXP (DECL_RTL (decl), 0) = newrtl; } void arm_pe_encode_section_info (tree decl, rtx rtl, int first ATTRIBUTE_UNUSED) { /* This bit is copied from arm_encode_section_info. */ if (optimize > 0 && TREE_CONSTANT (decl)) SYMBOL_REF_FLAG (XEXP (rtl, 0)) = 1; /* Mark the decl so we can tell from the rtl whether the object is dllexport'd or dllimport'd. */ if (arm_dllexport_p (decl)) arm_mark_dllexport (decl); else if (arm_dllimport_p (decl)) arm_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 @i.__imp_foo. We need to remove that. */ 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 && arm_dllimport_name_p (XSTR (XEXP (XEXP (DECL_RTL (decl), 0), 0), 0))) { const char *oldname = XSTR (XEXP (XEXP (DECL_RTL (decl), 0), 0), 0); tree idp = get_identifier (oldname + 9); rtx newrtl = gen_rtx_SYMBOL_REF (Pmode, IDENTIFIER_POINTER (idp)); XEXP (DECL_RTL (decl), 0) = newrtl; /* We previously set TREE_PUBLIC and DECL_EXTERNAL. ??? We leave these alone for now. */ } } void arm_pe_unique_section (tree decl, int reloc) { int len; const char * name; char * string; const char * prefix; name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); name = arm_strip_name_encoding (name); /* The object is put in, for example, section .text$foo. The linker will then ultimately place them in .text (everything from the $ on is stripped). */ if (TREE_CODE (decl) == FUNCTION_DECL) prefix = ".text$"; else if (decl_readonly_section (decl, reloc)) prefix = ".rdata$"; else prefix = ".data$"; len = strlen (name) + strlen (prefix); string = XALLOCAVEC (char, len + 1); sprintf (string, "%s%s", prefix, name); DECL_SECTION_NAME (decl) = build_string (len, string); }
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