| 1 | /* XCOFF definitions. These are needed in dbxout.c, final.c,
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| 2 | and xcoffout.h.
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| 3 | Copyright (C) 1998, 2000 Free Software Foundation, Inc.
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| 4 |
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| 5 | This file is part of GCC.
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| 6 |
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| 7 | GCC is free software; you can redistribute it and/or modify it under
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| 8 | the terms of the GNU General Public License as published by the Free
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| 9 | Software Foundation; either version 2, or (at your option) any later
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| 10 | version.
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| 11 |
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| 12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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| 13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or
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| 14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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| 15 | for more details.
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| 16 |
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| 17 | You should have received a copy of the GNU General Public License
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| 18 | along with GCC; see the file COPYING. If not, write to the Free
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| 19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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| 20 | 02111-1307, USA. */
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| 21 |
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| 22 |
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| 23 | #define ASM_STABS_OP "\t.stabx\t"
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| 24 |
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| 25 | /* Tags and typedefs are C_DECL in XCOFF, not C_LSYM. */
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| 26 |
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| 27 | #define DBX_TYPE_DECL_STABS_CODE N_DECL
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| 28 |
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| 29 | /* Use the XCOFF predefined type numbers. */
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| 30 |
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| 31 | /* ??? According to metin, typedef stabx must go in text control section,
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| 32 | but he did not make this changes everywhere where such typedef stabx
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| 33 | can be emitted, so it is really needed or not? */
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| 34 |
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| 35 | #define DBX_OUTPUT_STANDARD_TYPES(SYMS) \
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| 36 | { \
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| 37 | text_section (); \
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| 38 | xcoff_output_standard_types (SYMS); \
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| 39 | }
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| 40 |
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| 41 | /* Any type with a negative type index has already been output. */
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| 42 |
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| 43 | #define DBX_TYPE_DEFINED(TYPE) (TYPE_SYMTAB_ADDRESS (TYPE) < 0)
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| 44 |
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| 45 | /* Must use N_STSYM for static const variables (those in the text section)
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| 46 | instead of N_FUN. */
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| 47 |
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| 48 | #define DBX_STATIC_CONST_VAR_CODE N_STSYM
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| 49 |
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| 50 | /* For static variables, output code to define the start of a static block.
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| 51 |
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| 52 | ??? The IBM rs6000/AIX assembler has a bug that causes bss block debug
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| 53 | info to be occasionally lost. A simple example is this:
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| 54 | int a; static int b;
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| 55 | The commands `gcc -g -c tmp.c; dump -t tmp.o' gives
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| 56 | [10] m 0x00000016 1 0 0x8f 0x0000 .bs
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| 57 | [11] m 0x00000000 1 0 0x90 0x0000 .es
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| 58 | ...
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| 59 | [21] m 0x00000000 -2 0 0x85 0x0000 b:S-1
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| 60 | which is wrong. The `b:S-1' must be between the `.bs' and `.es'.
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| 61 | We can apparently work around the problem by forcing the text section
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| 62 | (even if we are already in the text section) immediately before outputting
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| 63 | the `.bs'. This should be fixed in the next major AIX release (3.3?). */
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| 64 |
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| 65 | #define DBX_STATIC_BLOCK_START(ASMFILE,CODE) \
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| 66 | { \
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| 67 | if ((CODE) == N_STSYM) \
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| 68 | fprintf ((ASMFILE), "\t.bs\t%s[RW]\n", xcoff_private_data_section_name);\
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| 69 | else if ((CODE) == N_LCSYM) \
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| 70 | { \
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| 71 | fprintf ((ASMFILE), "%s\n", TEXT_SECTION_ASM_OP); \
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| 72 | fprintf ((ASMFILE), "\t.bs\t%s\n", xcoff_bss_section_name); \
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| 73 | } \
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| 74 | }
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| 75 |
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| 76 | /* For static variables, output code to define the end of a static block. */
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| 77 |
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| 78 | #define DBX_STATIC_BLOCK_END(ASMFILE,CODE) \
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| 79 | { \
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| 80 | if ((CODE) == N_STSYM || (CODE) == N_LCSYM) \
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| 81 | fputs ("\t.es\n", (ASMFILE)); \
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| 82 | }
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| 83 |
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| 84 | /* We must use N_RPYSM instead of N_RSYM for register parameters. */
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| 85 |
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| 86 | #define DBX_REGPARM_STABS_CODE N_RPSYM
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| 87 |
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| 88 | /* We must use 'R' instead of 'P' for register parameters. */
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| 89 |
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| 90 | #define DBX_REGPARM_STABS_LETTER 'R'
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| 91 |
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| 92 | /* Define our own finish symbol function, since xcoff stabs have their
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| 93 | own different format. */
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| 94 |
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| 95 | #define DBX_FINISH_SYMBOL(SYM) \
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| 96 | { \
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| 97 | if (current_sym_addr && current_sym_code == N_FUN) \
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| 98 | fprintf (asmfile, "\",."); \
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| 99 | else \
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| 100 | fprintf (asmfile, "\","); \
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| 101 | /* If we are writing a function name, we must ensure that \
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| 102 | there is no storage-class suffix on the name. */ \
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| 103 | if (current_sym_addr && current_sym_code == N_FUN \
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| 104 | && GET_CODE (current_sym_addr) == SYMBOL_REF) \
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| 105 | { \
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| 106 | const char *_p = XSTR (current_sym_addr, 0); \
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| 107 | if (*_p == '*') \
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| 108 | fprintf (asmfile, "%s", _p+1); \
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| 109 | else \
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| 110 | for (; *_p != '[' && *_p; _p++) \
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| 111 | fprintf (asmfile, "%c", *_p); \
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| 112 | } \
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| 113 | else if (current_sym_addr) \
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| 114 | output_addr_const (asmfile, current_sym_addr); \
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| 115 | else if (current_sym_code == N_GSYM) \
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| 116 | assemble_name (asmfile, XSTR (XEXP (DECL_RTL (sym), 0), 0)); \
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| 117 | else \
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| 118 | fprintf (asmfile, "%d", current_sym_value); \
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| 119 | fprintf (asmfile, ",%d,0\n", stab_to_sclass (current_sym_code)); \
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| 120 | }
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| 121 |
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| 122 | /* These are IBM XCOFF extensions we need to reference in dbxout.c
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| 123 | and xcoffout.c. */
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| 124 |
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| 125 | /* AIX XCOFF uses this for typedefs. This can have any value, since it is
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| 126 | only used for translation into a C_DECL storage class. */
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| 127 | #ifndef N_DECL
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| 128 | #define N_DECL 0x8c
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| 129 | #endif
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| 130 | /* AIX XCOFF uses this for parameters passed in registers. This can have
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| 131 | any value, since it is only used for translation into a C_RPSYM storage
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| 132 | class. */
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| 133 | #ifndef N_RPSYM
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| 134 | #define N_RPSYM 0x8e
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| 135 | #endif
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| 136 |
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| 137 | /* Name of the current include file. */
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| 138 |
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| 139 | extern const char *xcoff_current_include_file;
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| 140 |
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| 141 | /* Names of bss and data sections. These should be unique names for each
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| 142 | compilation unit. */
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| 143 |
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| 144 | extern char *xcoff_bss_section_name;
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| 145 | extern char *xcoff_private_data_section_name;
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| 146 | extern char *xcoff_read_only_section_name;
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| 147 |
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| 148 | /* Last source file name mentioned in a NOTE insn. */
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| 149 |
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| 150 | extern const char *xcoff_lastfile;
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| 151 |
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| 152 | /* Don't write out path name for main source file. */
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| 153 | #define DBX_OUTPUT_MAIN_SOURCE_DIRECTORY(FILE,FILENAME)
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| 154 |
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| 155 | /* Write out main source file name using ".file" rather than ".stabs".
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| 156 | We don't actually do this here, because the assembler gets confused if there
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| 157 | is more than one .file directive. ASM_FILE_START in config/rs6000/rs6000.h
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| 158 | is already emitting a .file directory, so we don't output one here also.
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| 159 | Initialize xcoff_lastfile. */
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| 160 | #define DBX_OUTPUT_MAIN_SOURCE_FILENAME(FILE,FILENAME) \
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| 161 | xcoff_lastfile = (FILENAME)
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| 162 |
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| 163 | /* If we are still in an include file, its end must be marked. */
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| 164 | #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME) \
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| 165 | { \
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| 166 | if (xcoff_current_include_file) \
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| 167 | { \
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| 168 | fputs ("\t.ei\t", (FILE)); \
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| 169 | output_quoted_string ((FILE), xcoff_current_include_file); \
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| 170 | putc ('\n', (FILE)); \
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| 171 | xcoff_current_include_file = NULL; \
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| 172 | } \
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| 173 | }
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| 174 |
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| 175 | /* .stabx has the type in a different place. */
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| 176 | #if 0 /* Do not emit any marker for XCOFF until assembler allows XFT_CV. */
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| 177 | #define DBX_OUTPUT_GCC_MARKER(FILE) \
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| 178 | fprintf ((FILE), "%s\"%s\",0,%d,0\n", ASM_STABS_OP, STABS_GCC_MARKER, \
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| 179 | stab_to_sclass (N_GSYM))
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| 180 | #else
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| 181 | #define DBX_OUTPUT_GCC_MARKER(FILE)
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| 182 | #endif
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| 183 |
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| 184 | /* Do not break .stabs pseudos into continuations. */
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| 185 | #define DBX_CONTIN_LENGTH 0
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| 186 |
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| 187 | /* Don't try to use the `x' type-cross-reference character in DBX data.
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| 188 | Also has the consequence of putting each struct, union or enum
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| 189 | into a separate .stabs, containing only cross-refs to the others. */
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| 190 | #define DBX_NO_XREFS
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| 191 |
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| 192 | /* We must put stabs in the text section. If we don't the assembler
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| 193 | won't handle them correctly; it will sometimes put stabs where gdb
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| 194 | can't find them. */
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| 195 |
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| 196 | #define DEBUG_SYMS_TEXT
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| 197 |
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| 198 | /* Prototype functions in xcoffout.c. */
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| 199 |
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| 200 | extern int stab_to_sclass PARAMS ((int));
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| 201 | #ifdef BUFSIZ
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| 202 | extern void xcoffout_begin_prologue PARAMS ((unsigned int,
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| 203 | const char *));
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| 204 | extern void xcoffout_begin_block PARAMS ((unsigned, unsigned));
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| 205 | extern void xcoffout_end_epilogue PARAMS ((void));
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| 206 | extern void xcoffout_end_function PARAMS ((unsigned int));
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| 207 | extern void xcoffout_end_block PARAMS ((unsigned, unsigned));
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| 208 | #endif /* BUFSIZ */
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| 209 |
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| 210 | #ifdef TREE_CODE
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| 211 | extern void xcoff_output_standard_types PARAMS ((tree));
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| 212 | #ifdef BUFSIZ
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| 213 | extern void xcoffout_declare_function PARAMS ((FILE *, tree, const char *));
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| 214 | #endif /* BUFSIZ */
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| 215 | #endif /* TREE_CODE */
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| 216 |
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| 217 | #ifdef RTX_CODE
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| 218 | #ifdef BUFSIZ
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| 219 | extern void xcoffout_source_line PARAMS ((unsigned int,
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| 220 | const char *));
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| 221 | #endif /* BUFSIZ */
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| 222 | #endif /* RTX_CODE */
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