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    2004
   4    Free Software Foundation, Inc.
   5    Contributed by Fred Fish (fnf@cygnus.com).
   6
   7 This file is part of GCC.
   8
   9 GCC is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2, or (at your option)
  12 any later version.
  13
  14 GCC is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GCC; see the file COPYING.  If not, write to
  21 the Free Software Foundation, 59 Temple Place - Suite 330,
  22 Boston, MA 02111-1307, USA.  */
  23
  24 /* The Solaris 2.0 x86 linker botches alignment of code sections.
  25    It tries to align to a 16 byte boundary by padding with 0x00000090
  26    ints, rather than 0x90 bytes (nop).  This generates trash in the
  27    ".init" section since the contribution from crtbegin.o is only 7
  28    bytes.  The linker pads it to 16 bytes with a single 0x90 byte, and
  29    two 0x00000090 ints, which generates a segmentation violation when
  30    executed.  This macro forces the assembler to do the padding, since
  31    it knows what it is doing.  */
  32 #define FORCE_CODE_SECTION_ALIGN  asm(ALIGN_ASM_OP "16");
  33
  34 /* Old versions of the Solaris assembler can not handle the difference of
  35    labels in different sections, so force DW_EH_PE_datarel.  */
  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)                         \
  39                | (TARGET_64BIT ? DW_EH_PE_pcrel | DW_EH_PE_sdata4       \
  40                   : DW_EH_PE_datarel))                                  \
  41    : DW_EH_PE_absptr)
  42
  43 /* The Solaris linker will not merge a read-only .eh_frame section
  44    with a read-write .eh_frame section.  None of the encodings used
  45    with non-PIC code require runtime relocations.  In 64-bit mode,
  46    since there is no backwards compatibility issue, we use a read-only
  47    section for .eh_frame.  In 32-bit mode, we use a writable .eh_frame
  48    section in order to be compatible with G++ for Solaris x86.  */
  49 #undef EH_TABLES_CAN_BE_READ_ONLY
  50 #define EH_TABLES_CAN_BE_READ_ONLY (TARGET_64BIT)
  51
  52 /* Solaris 2/Intel as chokes on #line directives.  */
  53 #undef CPP_SPEC
  54 #define CPP_SPEC "%{.S:-P} %(cpp_subtarget)"
  55
  56 /* FIXME: Removed -K PIC from generic Solaris 2 ASM_SPEC: the native assembler
  57    gives many warnings: R_386_32 relocation is used for symbol ".text".  */
  58 #undef ASM_SPEC
  59 #define ASM_SPEC "\
  60 %{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s \
  61 %(asm_cpu) \
  62 "
  63
  64 #define ASM_CPU_SPEC ""
  65
  66 #undef SUBTARGET_EXTRA_SPECS
  67 #define SUBTARGET_EXTRA_SPECS \
  68   { "cpp_subtarget",    CPP_SUBTARGET_SPEC },   \
  69   { "asm_cpu",          ASM_CPU_SPEC },         \
  70   { "startfile_arch",   STARTFILE_ARCH_SPEC },  \
  71   { "link_arch",        LINK_ARCH_SPEC }
  72
  73 #undef LOCAL_LABEL_PREFIX
  74 #define LOCAL_LABEL_PREFIX "."
  75
  76 /* The 32-bit Solaris assembler does not support .quad.  Do not use it.  */
  77 #ifndef TARGET_BI_ARCH
  78 #undef ASM_QUAD
  79 #endif
  80
  81 /* The Solaris assembler wants a .local for non-exported aliases.  */
  82 #define ASM_OUTPUT_DEF_FROM_DECLS(FILE, DECL, TARGET)   \
  83   do {                                                  \
  84     const char *declname =                              \
  85       IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL));  \
  86     ASM_OUTPUT_DEF ((FILE), declname,                   \
  87                     IDENTIFIER_POINTER (TARGET));       \
  88     if (! TREE_PUBLIC (DECL))                           \
  89       {                                                 \
  90         fprintf ((FILE), "%s", LOCAL_ASM_OP);           \
  91         assemble_name ((FILE), declname);               \
  92         fprintf ((FILE), "\n");                         \
  93       }                                                 \
  94   } while (0)
  95
  96 /* Solaris-specific #pragmas are implemented on top of attributes.  Hook in
  97    the bits from config/sol2.c.  */
  98 #define SUBTARGET_INSERT_ATTRIBUTES solaris_insert_attributes
  99 #define SUBTARGET_ATTRIBUTE_TABLE SOLARIS_ATTRIBUTE_TABLE
 100
 101 /* Output a simple call for .init/.fini.  */
 102 #define ASM_OUTPUT_CALL(FILE, FN)                               \
 103   do                                                            \
 104     {                                                           \
 105       fprintf (FILE, "\tcall\t");                               \
 106       print_operand (FILE, XEXP (DECL_RTL (FN), 0), 'P');       \
 107       fprintf (FILE, "\n");                                     \
 108     }                                                           \
 109   while (0)
 110
 111 /* We do not need NT_VERSION notes.  */
 112 #undef X86_FILE_START_VERSION_DIRECTIVE
 113 #define X86_FILE_START_VERSION_DIRECTIVE false