gcc/config/i386/sol2.h

   1 /* Target definitions for GCC for Intel 80386 running Solaris 2
   2    Copyright (C) 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
   3    Free Software Foundation, Inc.
   4    Contributed by Fred Fish (fnf@cygnus.com).
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2, or (at your option)
  11 any later version.
  12
  13 GCC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING.  If not, write to
  20 the Free Software Foundation, 59 Temple Place - Suite 330,
  21 Boston, MA 02111-1307, USA.  */
  22
  23 /* The Solaris 2.0 x86 linker botches alignment of code sections.
  24    It tries to align to a 16 byte boundary by padding with 0x00000090
  25    ints, rather than 0x90 bytes (nop).  This generates trash in the
  26    ".init" section since the contribution from crtbegin.o is only 7
  27    bytes.  The linker pads it to 16 bytes with a single 0x90 byte, and
  28    two 0x00000090 ints, which generates a segmentation violation when
  29    executed.  This macro forces the assembler to do the padding, since
  30    it knows what it is doing.  */
  31 #define FORCE_CODE_SECTION_ALIGN  asm(ALIGN_ASM_OP "16");
  32
  33 /* Select a format to encode pointers in exception handling data.  CODE
  34    is 0 for data, 1 for code labels, 2 for function pointers.  GLOBAL is
  35    true if the symbol may be affected by dynamic relocations.  */
  36 #undef ASM_PREFERRED_EH_DATA_FORMAT
  37 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)                       \
  38   (flag_pic ? (GLOBAL ? DW_EH_PE_indirect : 0) | DW_EH_PE_datarel       \
  39    : DW_EH_PE_absptr)
  40
  41 /* Solaris 2/Intel as chokes on #line directives.  */
  42 #undef CPP_SPEC
  43 #define CPP_SPEC "%{.S:-P} %(cpp_subtarget)"
  44
  45 /* FIXME: Removed -K PIC from generic Solaris 2 ASM_SPEC: the native assembler
  46    gives many warnings: R_386_32 relocation is used for symbol ".text".  */
  47 #undef ASM_SPEC
  48 #define ASM_SPEC "\
  49 %{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s \
  50 %(asm_cpu) \
  51 "
  52
  53 #define ASM_CPU_SPEC ""
  54
  55 #undef SUBTARGET_EXTRA_SPECS
  56 #define SUBTARGET_EXTRA_SPECS \
  57   { "cpp_subtarget",    CPP_SUBTARGET_SPEC },   \
  58   { "asm_cpu",          ASM_CPU_SPEC },         \
  59   { "startfile_arch",   STARTFILE_ARCH_SPEC },  \
  60   { "link_arch",        LINK_ARCH_SPEC }
  61
  62 #undef LOCAL_LABEL_PREFIX
  63 #define LOCAL_LABEL_PREFIX "."
  64
  65 /* The Solaris assembler does not support .quad.  Do not use it.  */
  66 #undef ASM_QUAD
  67
  68 /* The Solaris assembler wants a .local for non-exported aliases.  */
  69 #define ASM_OUTPUT_DEF_FROM_DECLS(FILE, DECL, TARGET)   \
  70   do {                                                  \
  71     const char *declname =                              \
  72       IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL));  \
  73     ASM_OUTPUT_DEF ((FILE), declname,                   \
  74                     IDENTIFIER_POINTER (TARGET));       \
  75     if (! TREE_PUBLIC (DECL))                           \
  76       {                                                 \
  77         fprintf ((FILE), "%s", LOCAL_ASM_OP);           \
  78         assemble_name ((FILE), declname);               \
  79         fprintf ((FILE), "\n");                         \
  80       }                                                 \
  81   } while (0)
  82
  83 /* Solaris-specific #pragmas are implemented on top of attributes.  Hook in
  84    the bits from config/sol2.c.  */
  85 #define SUBTARGET_INSERT_ATTRIBUTES solaris_insert_attributes
  86 #define SUBTARGET_ATTRIBUTE_TABLE SOLARIS_ATTRIBUTE_TABLE
  87
  88 /* Output a simple call for .init/.fini.  */
  89 #define ASM_OUTPUT_CALL(FILE, NAME)                     \
  90   fprintf (FILE, "\tcall\t%s\n", NAME)