gcc/xcoffout.h

   1 /* XCOFF definitions.  These are needed in dbxout.c, final.c,
   2    and xcoffout.h.  */
   3
   4 #define ASM_STABS_OP ".stabx"
   5
   6 /* Tags and typedefs are C_DECL in XCOFF, not C_LSYM.  */
   7
   8 #define DBX_TYPE_DECL_STABS_CODE N_DECL
   9
  10 /* Use the XCOFF predefined type numbers.  */
  11
  12 /* ??? According to metin, typedef stabx must go in text control section,
  13    but he did not make this changes everywhere where such typedef stabx
  14    can be emitted, so it is really needed or not?  */
  15
  16 #define DBX_OUTPUT_STANDARD_TYPES(SYMS)         \
  17 {                                               \
  18   text_section ();                              \
  19   xcoff_output_standard_types (SYMS);           \
  20 }
  21
  22 /* Any type with a negative type index has already been output.  */
  23
  24 #define DBX_TYPE_DEFINED(TYPE) (TYPE_SYMTAB_ADDRESS (TYPE) < 0)
  25
  26 /* Must use N_STSYM for static const variables (those in the text section)
  27    instead of N_FUN.  */
  28
  29 #define DBX_STATIC_CONST_VAR_CODE N_STSYM
  30
  31 /* For static variables, output code to define the start of a static block.
  32
  33    ??? The IBM rs6000/AIX assembler has a bug that causes bss block debug
  34    info to be occasionally lost.  A simple example is this:
  35         int a; static int b;
  36    The commands `gcc -g -c tmp.c; dump -t tmp.o' gives
  37 [10]    m   0x00000016         1     0    0x8f  0x0000            .bs
  38 [11]    m   0x00000000         1     0    0x90  0x0000            .es
  39 ...
  40 [21]    m   0x00000000        -2     0    0x85  0x0000            b:S-1
  41    which is wrong.  The `b:S-1' must be between the `.bs' and `.es'.
  42    We can apparently work around the problem by forcing the text section
  43    (even if we are already in the text section) immediately before outputting
  44    the `.bs'.  This should be fixed in the next major AIX release (3.3?).  */
  45
  46 #define DBX_STATIC_BLOCK_START(ASMFILE,CODE)                            \
  47 {                                                                       \
  48   if ((CODE) == N_STSYM)                                                \
  49     fprintf ((ASMFILE), "\t.bs\t%s[RW]\n", xcoff_private_data_section_name);\
  50   else if ((CODE) == N_LCSYM)                                           \
  51     {                                                                   \
  52       fprintf ((ASMFILE), "%s\n", TEXT_SECTION_ASM_OP);                 \
  53       fprintf ((ASMFILE), "\t.bs\t%s\n", xcoff_bss_section_name);       \
  54     }                                                                   \
  55 }
  56
  57 /* For static variables, output code to define the end of a static block.  */
  58
  59 #define DBX_STATIC_BLOCK_END(ASMFILE,CODE)                              \
  60 {                                                                       \
  61   if ((CODE) == N_STSYM || (CODE) == N_LCSYM)                           \
  62     fputs ("\t.es\n", (ASMFILE));                                       \
  63 }
  64
  65 /* We must use N_RPYSM instead of N_RSYM for register parameters.  */
  66
  67 #define DBX_REGPARM_STABS_CODE N_RPSYM
  68
  69 /* We must use 'R' instead of 'P' for register parameters.  */
  70
  71 #define DBX_REGPARM_STABS_LETTER 'R'
  72
  73 /* Define our own finish symbol function, since xcoff stabs have their
  74    own different format.  */
  75
  76 #define DBX_FINISH_SYMBOL(SYM)                                  \
  77 {                                                               \
  78   if (current_sym_addr && current_sym_code == N_FUN)            \
  79     fprintf (asmfile, "\",.");                                  \
  80   else                                                          \
  81     fprintf (asmfile, "\",");                                   \
  82   /* If we are writing a function name, we must ensure that     \
  83      there is no storage-class suffix on the name.  */          \
  84   if (current_sym_addr && current_sym_code == N_FUN             \
  85       && GET_CODE (current_sym_addr) == SYMBOL_REF)             \
  86     {                                                           \
  87       char *_p = XSTR (current_sym_addr, 0);                    \
  88       if (*_p == '*')                                           \
  89         fprintf (asmfile, "%s", _p+1);                          \
  90       else                                                      \
  91         for (; *_p != '[' && *_p; _p++)                         \
  92           fprintf (asmfile, "%c", *_p);                         \
  93     }                                                           \
  94   else if (current_sym_addr)                                    \
  95     output_addr_const (asmfile, current_sym_addr);              \
  96   else if (current_sym_code == N_GSYM)                          \
  97     assemble_name (asmfile, XSTR (XEXP (DECL_RTL (sym), 0), 0)); \
  98   else                                                          \
  99     fprintf (asmfile, "%d", current_sym_value);                 \
 100   fprintf (asmfile, ",%d,0\n", stab_to_sclass (current_sym_code)); \
 101 }
 102
 103 /* These are IBM XCOFF extensions we need to reference in dbxout.c
 104    and xcoffout.c.  */
 105
 106 /* AIX XCOFF uses this for typedefs.  This can have any value, since it is
 107    only used for translation into a C_DECL storage class.  */
 108 #ifndef N_DECL
 109 #define N_DECL 0x8c
 110 #endif
 111 /* AIX XCOFF uses this for parameters passed in registers.  This can have
 112    any value, since it is only used for translation into a C_RPSYM storage
 113    class.  */
 114 #ifndef N_RPSYM
 115 #define N_RPSYM 0x8e
 116 #endif
 117
 118 /* Name of the current include file.  */
 119
 120 extern char *xcoff_current_include_file;
 121
 122 /* Names of bss and data sections.  These should be unique names for each
 123    compilation unit.  */
 124
 125 extern char *xcoff_bss_section_name;
 126 extern char *xcoff_private_data_section_name;
 127 extern char *xcoff_read_only_section_name;
 128
 129 /* Last source file name mentioned in a NOTE insn.  */
 130
 131 extern char *xcoff_lastfile;
 132
 133 /* Don't write out path name for main source file.  */
 134 #define DBX_OUTPUT_MAIN_SOURCE_DIRECTORY(FILE,FILENAME)
 135
 136 /* Write out main source file name using ".file" rather than ".stabs".
 137    We don't actually do this here, because the assembler gets confused if there
 138    is more than one .file directive.  ASM_FILE_START in config/rs6000/rs6000.h
 139    is already emitting a .file directory, so we don't output one here also.
 140    Initialize xcoff_lastfile.  */
 141 #define DBX_OUTPUT_MAIN_SOURCE_FILENAME(FILE,FILENAME) \
 142   xcoff_lastfile = (FILENAME)
 143
 144 /* If we are still in an include file, its end must be marked.  */
 145 #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME) \
 146 {                                                       \
 147   if (xcoff_current_include_file)                       \
 148     {                                                   \
 149       fputs ("\t.ei\t", (FILE));                        \
 150       output_quoted_string ((FILE), xcoff_current_include_file);        \
 151       putc ('\n', (FILE));                              \
 152       xcoff_current_include_file = NULL;                \
 153     }                                                   \
 154 }
 155
 156 /* Do not break .stabs pseudos into continuations.  */
 157 #define DBX_CONTIN_LENGTH 0
 158
 159 /* Don't try to use the `x' type-cross-reference character in DBX data.
 160    Also has the consequence of putting each struct, union or enum
 161    into a separate .stabs, containing only cross-refs to the others.  */
 162 #define DBX_NO_XREFS
 163
 164 /* We must put stabs in the text section.  If we don't the assembler
 165    won't handle them correctly; it will sometimes put stabs where gdb
 166    can't find them.  */
 167
 168 #define DEBUG_SYMS_TEXT