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1 /* Target definitions for GCC for Intel 80386 running Solaris 2
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2 Copyright (C) 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
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3 2004, 2007, 2008 Free Software Foundation, Inc.
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4 Contributed by Fred Fish (fnf@cygnus.com).
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5
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6 This file is part of GCC.
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7
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8 GCC is free software; you can redistribute it and/or modify
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9 it under the terms of the GNU General Public License as published by
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10 the Free Software Foundation; either version 3, or (at your option)
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11 any later version.
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12
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13 GCC is distributed in the hope that it will be useful,
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14 but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 GNU General Public License for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with GCC; see the file COPYING3. If not see
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20 <http://www.gnu.org/licenses/>. */
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21
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22 /* The Solaris 2.0 x86 linker botches alignment of code sections.
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23 It tries to align to a 16 byte boundary by padding with 0x00000090
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24 ints, rather than 0x90 bytes (nop). This generates trash in the
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25 ".init" section since the contribution from crtbegin.o is only 7
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26 bytes. The linker pads it to 16 bytes with a single 0x90 byte, and
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27 two 0x00000090 ints, which generates a segmentation violation when
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28 executed. This macro forces the assembler to do the padding, since
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29 it knows what it is doing. */
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30 #define FORCE_CODE_SECTION_ALIGN asm(ALIGN_ASM_OP "16");
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31
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32 /* Old versions of the Solaris assembler can not handle the difference of
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33 labels in different sections, so force DW_EH_PE_datarel. */
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34 #undef ASM_PREFERRED_EH_DATA_FORMAT
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35 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
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36 (flag_pic ? ((GLOBAL ? DW_EH_PE_indirect : 0) \
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37 | (TARGET_64BIT ? DW_EH_PE_pcrel | DW_EH_PE_sdata4 \
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38 : DW_EH_PE_datarel)) \
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39 : DW_EH_PE_absptr)
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40
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41 /* The Solaris linker will not merge a read-only .eh_frame section
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42 with a read-write .eh_frame section. None of the encodings used
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43 with non-PIC code require runtime relocations. In 64-bit mode,
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44 since there is no backwards compatibility issue, we use a read-only
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45 section for .eh_frame. In 32-bit mode, we use a writable .eh_frame
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46 section in order to be compatible with G++ for Solaris x86. */
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47 #undef EH_TABLES_CAN_BE_READ_ONLY
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48 #define EH_TABLES_CAN_BE_READ_ONLY (TARGET_64BIT)
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49
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50 /* Solaris 2/Intel as chokes on #line directives. */
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51 #undef CPP_SPEC
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52 #define CPP_SPEC "%{,assembler-with-cpp:-P} %(cpp_subtarget)"
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53
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54 /* FIXME: Removed -K PIC from generic Solaris 2 ASM_SPEC: the native assembler
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55 gives many warnings: R_386_32 relocation is used for symbol ".text". */
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56 #undef ASM_SPEC
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57 #define ASM_SPEC "\
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58 %{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s \
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59 %(asm_cpu) \
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60 "
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61
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62 #define ASM_CPU_SPEC ""
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63
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64 #undef SUBTARGET_EXTRA_SPECS
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65 #define SUBTARGET_EXTRA_SPECS \
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66 { "cpp_subtarget", CPP_SUBTARGET_SPEC }, \
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67 { "asm_cpu", ASM_CPU_SPEC }, \
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68 { "startfile_arch", STARTFILE_ARCH_SPEC }, \
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69 { "link_arch", LINK_ARCH_SPEC }
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70
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71 #undef LOCAL_LABEL_PREFIX
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72 #define LOCAL_LABEL_PREFIX "."
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73
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74 /* The 32-bit Solaris assembler does not support .quad. Do not use it. */
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75 #ifndef TARGET_BI_ARCH
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76 #undef ASM_QUAD
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77 #endif
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78
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79 /* The Solaris assembler wants a .local for non-exported aliases. */
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80 #define ASM_OUTPUT_DEF_FROM_DECLS(FILE, DECL, TARGET) \
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81 do { \
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82 const char *declname = \
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83 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL)); \
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84 ASM_OUTPUT_DEF ((FILE), declname, \
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85 IDENTIFIER_POINTER (TARGET)); \
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86 if (! TREE_PUBLIC (DECL)) \
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87 { \
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88 fprintf ((FILE), "%s", LOCAL_ASM_OP); \
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89 assemble_name ((FILE), declname); \
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90 fprintf ((FILE), "\n"); \
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91 } \
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92 } while (0)
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93
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94 /* Solaris-specific #pragmas are implemented on top of attributes. Hook in
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95 the bits from config/sol2.c. */
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96 #define SUBTARGET_INSERT_ATTRIBUTES solaris_insert_attributes
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97 #define SUBTARGET_ATTRIBUTE_TABLE SOLARIS_ATTRIBUTE_TABLE
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98
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99 /* Register the Solaris-specific #pragma directives. */
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100 #define REGISTER_SUBTARGET_PRAGMAS() solaris_register_pragmas ()
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101
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102 /* Output a simple call for .init/.fini. */
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103 #define ASM_OUTPUT_CALL(FILE, FN) \
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104 do \
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105 { \
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106 fprintf (FILE, "\tcall\t"); \
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107 print_operand (FILE, XEXP (DECL_RTL (FN), 0), 'P'); \
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108 fprintf (FILE, "\n"); \
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109 } \
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110 while (0)
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111
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112 /* We do not need NT_VERSION notes. */
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113 #undef X86_FILE_START_VERSION_DIRECTIVE
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114 #define X86_FILE_START_VERSION_DIRECTIVE false
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