gcc/config/ia64/sysv4.h

   1 /* Override definitions in elfos.h/svr4.h to be correct for IA64.  */
   2
   3 /* We want DWARF2 as specified by the IA64 ABI.  */
   4 #undef PREFERRED_DEBUGGING_TYPE
   5 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
   6
   7 /* Stabs does not work properly for 64-bit targets.  */
   8 #undef DBX_DEBUGGING_INFO
   9
  10 /* Various pseudo-ops for which the Intel assembler uses non-standard
  11    definitions.  */
  12
  13 #undef STRING_ASM_OP
  14 #define STRING_ASM_OP "\tstringz\t"
  15
  16 #undef SKIP_ASM_OP
  17 #define SKIP_ASM_OP "\t.skip\t"
  18
  19 #undef COMMON_ASM_OP
  20 #define COMMON_ASM_OP "\t.common\t"
  21
  22 #undef ASCII_DATA_ASM_OP
  23 #define ASCII_DATA_ASM_OP "\tstring\t"
  24
  25 /* ia64-specific options for gas
  26    ??? ia64 gas doesn't accept standard svr4 assembler options?  */
  27 #undef ASM_SPEC
  28 #define ASM_SPEC "-x %{mconstant-gp} %{mauto-pic} %(asm_extra)"
  29
  30 /* ??? Unfortunately, .lcomm doesn't work, because it puts things in either
  31    .bss or .sbss, and we can't control the decision of which is used.  When
  32    I use .lcomm, I get a cryptic "Section group has no member" error from
  33    the Intel simulator.  So we must explicitly put variables in .bss
  34    instead.  This matters only if we care about the Intel assembler.  */
  35
  36 /* This is asm_output_aligned_bss from varasm.c without the
  37    (*targetm.asm_out.globalize_label) call at the beginning.  */
  38
  39 /* This is for final.c, because it is used by ASM_DECLARE_OBJECT_NAME.  */
  40 extern int size_directive_output;
  41
  42 #undef ASM_OUTPUT_ALIGNED_LOCAL
  43 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
  44 do {                                                                    \
  45   if ((DECL) && sdata_symbolic_operand (XEXP (DECL_RTL (DECL), 0), Pmode)) \
  46     sbss_section ();                                                    \
  47   else                                                                  \
  48     bss_section ();                                                     \
  49   ASM_OUTPUT_ALIGN (FILE, floor_log2 ((ALIGN) / BITS_PER_UNIT));        \
  50   ASM_DECLARE_OBJECT_NAME (FILE, NAME, DECL);                           \
  51   ASM_OUTPUT_SKIP (FILE, SIZE ? SIZE : 1);                              \
  52 } while (0)
  53
  54 /* The # tells the Intel assembler that this is not a register name.
  55    However, we can't emit the # in a label definition, so we set a variable
  56    in ASM_OUTPUT_LABEL to control whether we want the postfix here or not.
  57    We append the # to the label name, but since NAME can be an expression
  58    we have to scan it for a non-label character and insert the # there.  */
  59
  60 #undef ASM_OUTPUT_LABELREF
  61 #define ASM_OUTPUT_LABELREF(STREAM, NAME)       \
  62 do {                                            \
  63   const char *name_ = NAME;                     \
  64   if (*name_ == ENCODE_SECTION_INFO_CHAR)       \
  65     name_ += 2;                                 \
  66   if (*name_ == '*')                            \
  67     name_++;                                    \
  68   else                                          \
  69     fputs (user_label_prefix, STREAM);          \
  70   fputs (name_, STREAM);                        \
  71   if (!ia64_asm_output_label)                   \
  72     fputc ('#', STREAM);                        \
  73 } while (0)
  74
  75 /* Intel assembler requires both flags and type if declaring a non-predefined
  76    section.  */
  77 #undef INIT_SECTION_ASM_OP
  78 #define INIT_SECTION_ASM_OP     "\t.section\t.init,\"ax\",\"progbits\""
  79 #undef FINI_SECTION_ASM_OP
  80 #define FINI_SECTION_ASM_OP     "\t.section\t.fini,\"ax\",\"progbits\""
  81
  82 /* svr4.h undefines this, so we need to define it here.  */
  83 #define DBX_REGISTER_NUMBER(REGNO) \
  84   ia64_dbx_register_number(REGNO)
  85
  86 /* Things that svr4.h defines to the wrong type, because it assumes 32 bit
  87    ints and 32 bit longs.  */
  88
  89 #undef SIZE_TYPE
  90 #define SIZE_TYPE "long unsigned int"
  91
  92 #undef PTRDIFF_TYPE
  93 #define PTRDIFF_TYPE "long int"
  94
  95 #undef WCHAR_TYPE
  96 #define WCHAR_TYPE "int"
  97
  98 #undef WCHAR_TYPE_SIZE
  99 #define WCHAR_TYPE_SIZE 32
 100
 101 /* We redefine this to use the ia64 .proc pseudo-op.  */
 102
 103 #undef ASM_DECLARE_FUNCTION_NAME
 104 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
 105 do {                                                                    \
 106   fputs ("\t.proc ", FILE);                                             \
 107   assemble_name (FILE, NAME);                                           \
 108   fputc ('\n', FILE);                                                   \
 109   ASM_OUTPUT_LABEL (FILE, NAME);                                        \
 110 } while (0)
 111
 112 /* We redefine this to use the ia64 .endp pseudo-op.  */
 113
 114 #undef ASM_DECLARE_FUNCTION_SIZE
 115 #define ASM_DECLARE_FUNCTION_SIZE(FILE, NAME, DECL) \
 116 do {                                                                    \
 117   fputs ("\t.endp ", FILE);                                             \
 118   assemble_name (FILE, NAME);                                           \
 119   fputc ('\n', FILE);                                                   \
 120 } while (0)
 121
 122 /* A C expression which outputs to the stdio stream STREAM some appropriate
 123    text to go at the start of an assembler file.  */
 124
 125 /* ??? Looks like almost every port, except for a few original ones, get this
 126    wrong.  Must emit #NO_APP as first line of file to turn of special assembler
 127    preprocessing of files.  */
 128
 129 /* ??? Even worse, it doesn't work, because gas does not accept the tab chars
 130    that dwarf2out.c emits when #NO_APP.  */
 131
 132 /* ??? Unrelated, but dwarf2out.c emits unnecessary newlines after strings,
 133    may as well fix at the same time.  */
 134
 135 #undef ASM_FILE_START
 136 #define ASM_FILE_START(STREAM) \
 137 do {                                                                    \
 138   output_file_directive (STREAM, main_input_filename);                  \
 139   emit_safe_across_calls (STREAM);                                      \
 140 } while (0)
 141
 142 /* Override default elf definition.  */
 143 #undef  TARGET_ASM_SELECT_RTX_SECTION
 144 #define TARGET_ASM_SELECT_RTX_SECTION  ia64_select_rtx_section
 145
 146 #undef EXTRA_SECTIONS
 147 #define EXTRA_SECTIONS in_sdata, in_sbss
 148
 149 #undef EXTRA_SECTION_FUNCTIONS
 150 #define EXTRA_SECTION_FUNCTIONS                                         \
 151   SDATA_SECTION_FUNCTION                                                \
 152   SBSS_SECTION_FUNCTION
 153
 154 #define SDATA_SECTION_ASM_OP "\t.sdata"
 155
 156 #define SDATA_SECTION_FUNCTION                                          \
 157 void                                                                    \
 158 sdata_section ()                                                        \
 159 {                                                                       \
 160   if (in_section != in_sdata)                                           \
 161     {                                                                   \
 162       fprintf (asm_out_file, "%s\n", SDATA_SECTION_ASM_OP);             \
 163       in_section = in_sdata;                                            \
 164     }                                                                   \
 165 }
 166
 167 #define SBSS_SECTION_ASM_OP "\t.sbss"
 168
 169 #define SBSS_SECTION_FUNCTION                                           \
 170 void                                                                    \
 171 sbss_section ()                                                         \
 172 {                                                                       \
 173   if (in_section != in_sbss)                                            \
 174     {                                                                   \
 175       fprintf (asm_out_file, "%s\n", SBSS_SECTION_ASM_OP);              \
 176       in_section = in_sbss;                                             \
 177     }                                                                   \
 178 }