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1 /* Override definitions in elfos.h/svr4.h to be correct for IA64. */
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2
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3 #undef TARGET_INIT_LIBFUNCS
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4 #define TARGET_INIT_LIBFUNCS ia64_sysv4_init_libfuncs
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5
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6 /* We want DWARF2 as specified by the IA64 ABI. */
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7 #undef PREFERRED_DEBUGGING_TYPE
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8 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
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9
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10 /* Stabs does not work properly for 64-bit targets. */
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11 #undef DBX_DEBUGGING_INFO
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12
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13 /* Various pseudo-ops for which the Intel assembler uses non-standard
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14 definitions. */
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15
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16 #undef STRING_ASM_OP
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17 #define STRING_ASM_OP "\tstringz\t"
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18
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19 #undef SKIP_ASM_OP
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20 #define SKIP_ASM_OP "\t.skip\t"
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21
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22 #undef COMMON_ASM_OP
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23 #define COMMON_ASM_OP "\t.common\t"
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24
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25 #undef ASCII_DATA_ASM_OP
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26 #define ASCII_DATA_ASM_OP "\tstring\t"
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27
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28 /* ia64-specific options for gas
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29 ??? ia64 gas doesn't accept standard svr4 assembler options? */
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30 #undef ASM_SPEC
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31 #define ASM_SPEC "-x %{mconstant-gp} %{mauto-pic} %(asm_extra)"
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32
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33 /* ??? Unfortunately, .lcomm doesn't work, because it puts things in either
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34 .bss or .sbss, and we can't control the decision of which is used. When
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35 I use .lcomm, I get a cryptic "Section group has no member" error from
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36 the Intel simulator. So we must explicitly put variables in .bss
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37 instead. This matters only if we care about the Intel assembler. */
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38
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39 /* This is asm_output_aligned_bss from varasm.c without the
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40 (*targetm.asm_out.globalize_label) call at the beginning. */
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41
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42 /* This is for final.c, because it is used by ASM_DECLARE_OBJECT_NAME. */
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43 extern int size_directive_output;
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44
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45 #undef ASM_OUTPUT_ALIGNED_LOCAL
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46 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
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47 do { \
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48 if ((DECL) && sdata_symbolic_operand (XEXP (DECL_RTL (DECL), 0), Pmode)) \
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49 switch_to_section (sbss_section); \
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50 else \
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51 switch_to_section (bss_section); \
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52 ASM_OUTPUT_ALIGN (FILE, floor_log2 ((ALIGN) / BITS_PER_UNIT)); \
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53 ASM_DECLARE_OBJECT_NAME (FILE, NAME, DECL); \
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54 ASM_OUTPUT_SKIP (FILE, SIZE ? SIZE : 1); \
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55 } while (0)
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56
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57 /* The # tells the Intel assembler that this is not a register name.
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58 However, we can't emit the # in a label definition, so we set a variable
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59 in ASM_OUTPUT_LABEL to control whether we want the postfix here or not.
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60 We append the # to the label name, but since NAME can be an expression
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61 we have to scan it for a non-label character and insert the # there. */
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62
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63 #undef ASM_OUTPUT_LABELREF
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64 #define ASM_OUTPUT_LABELREF(STREAM, NAME) \
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65 do { \
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66 const char *name_ = NAME; \
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67 if (*name_ == '*') \
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68 name_++; \
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69 else \
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70 fputs (user_label_prefix, STREAM); \
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71 fputs (name_, STREAM); \
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72 if (!ia64_asm_output_label) \
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73 fputc ('#', STREAM); \
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74 } while (0)
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75
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76 /* Intel assembler requires both flags and type if declaring a non-predefined
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77 section. */
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78 #undef INIT_SECTION_ASM_OP
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79 #define INIT_SECTION_ASM_OP "\t.section\t.init,\"ax\",\"progbits\""
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80 #undef FINI_SECTION_ASM_OP
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81 #define FINI_SECTION_ASM_OP "\t.section\t.fini,\"ax\",\"progbits\""
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82
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83 /* svr4.h undefines this, so we need to define it here. */
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84 #define DBX_REGISTER_NUMBER(REGNO) \
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85 ia64_dbx_register_number(REGNO)
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86
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87 /* Things that svr4.h defines to the wrong type, because it assumes 32-bit
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88 ints and 32-bit longs. */
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89
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90 #undef SIZE_TYPE
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91 #define SIZE_TYPE "long unsigned int"
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92
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93 #undef PTRDIFF_TYPE
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94 #define PTRDIFF_TYPE "long int"
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95
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96 #undef WCHAR_TYPE
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97 #define WCHAR_TYPE "int"
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98
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99 #undef WCHAR_TYPE_SIZE
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100 #define WCHAR_TYPE_SIZE 32
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101
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102 /* We redefine this to use the ia64 .proc pseudo-op. */
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103
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104 #undef ASM_DECLARE_FUNCTION_NAME
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105 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
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106 do { \
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107 fputs ("\t.proc ", FILE); \
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108 assemble_name (FILE, NAME); \
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109 fputc ('\n', FILE); \
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110 ASM_OUTPUT_LABEL (FILE, NAME); \
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111 } while (0)
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112
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113 /* We redefine this to use the ia64 .endp pseudo-op. */
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114
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115 #undef ASM_DECLARE_FUNCTION_SIZE
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116 #define ASM_DECLARE_FUNCTION_SIZE(FILE, NAME, DECL) \
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117 do { \
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118 fputs ("\t.endp ", FILE); \
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119 assemble_name (FILE, NAME); \
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120 fputc ('\n', FILE); \
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121 } while (0)
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122
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123 /* Override default elf definition. */
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124 #undef TARGET_ASM_RELOC_RW_MASK
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125 #define TARGET_ASM_RELOC_RW_MASK ia64_reloc_rw_mask
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126 #undef TARGET_ASM_SELECT_RTX_SECTION
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127 #define TARGET_ASM_SELECT_RTX_SECTION ia64_select_rtx_section
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128
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129 #define SDATA_SECTION_ASM_OP "\t.sdata"
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130 #define SBSS_SECTION_ASM_OP "\t.sbss"
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