492 lines
13 KiB
C
492 lines
13 KiB
C
/* Output xcoff-format symbol table information from GNU compiler.
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Copyright (C) 1992, 1994, 1995, 1997, 1998, 1999, 2000, 2002
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Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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/* Output xcoff-format symbol table data. The main functionality is contained
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in dbxout.c. This file implements the sdbout-like parts of the xcoff
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interface. Many functions are very similar to their counterparts in
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sdbout.c. */
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#include "config.h"
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#include "system.h"
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#include "tree.h"
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#include "rtl.h"
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#include "flags.h"
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#include "toplev.h"
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#include "output.h"
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#include "ggc.h"
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#ifdef XCOFF_DEBUGGING_INFO
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/* This defines the C_* storage classes. */
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#include "dbxstclass.h"
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#include "xcoffout.h"
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#include "dbxout.h"
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#include "gstab.h"
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/* Line number of beginning of current function, minus one.
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Negative means not in a function or not using xcoff. */
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static int xcoff_begin_function_line = -1;
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static int xcoff_inlining = 0;
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/* Name of the current include file. */
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const char *xcoff_current_include_file;
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/* Name of the current function file. This is the file the `.bf' is
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emitted from. In case a line is emitted from a different file,
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(by including that file of course), then the line number will be
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absolute. */
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static const char *xcoff_current_function_file;
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/* Names of bss and data sections. These should be unique names for each
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compilation unit. */
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char *xcoff_bss_section_name;
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char *xcoff_private_data_section_name;
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char *xcoff_read_only_section_name;
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/* Last source file name mentioned in a NOTE insn. */
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const char *xcoff_lastfile;
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/* Macro definitions used below. */
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#define ABS_OR_RELATIVE_LINENO(LINENO) \
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((xcoff_inlining) ? (LINENO) : (LINENO) - xcoff_begin_function_line)
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/* Output source line numbers via ".line" rather than ".stabd". */
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#define ASM_OUTPUT_SOURCE_LINE(FILE,LINENUM) \
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do \
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{ \
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if (xcoff_begin_function_line >= 0) \
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fprintf (FILE, "\t.line\t%d\n", ABS_OR_RELATIVE_LINENO (LINENUM)); \
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} \
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while (0)
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#define ASM_OUTPUT_LFB(FILE,LINENUM) \
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{ \
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if (xcoff_begin_function_line == -1) \
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{ \
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xcoff_begin_function_line = (LINENUM) - 1;\
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fprintf (FILE, "\t.bf\t%d\n", (LINENUM)); \
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} \
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xcoff_current_function_file \
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= (xcoff_current_include_file \
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? xcoff_current_include_file : main_input_filename); \
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}
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#define ASM_OUTPUT_LFE(FILE,LINENUM) \
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do \
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{ \
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fprintf (FILE, "\t.ef\t%d\n", (LINENUM)); \
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xcoff_begin_function_line = -1; \
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} \
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while (0)
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#define ASM_OUTPUT_LBB(FILE,LINENUM,BLOCKNUM) \
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fprintf (FILE, "\t.bb\t%d\n", ABS_OR_RELATIVE_LINENO (LINENUM))
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#define ASM_OUTPUT_LBE(FILE,LINENUM,BLOCKNUM) \
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fprintf (FILE, "\t.eb\t%d\n", ABS_OR_RELATIVE_LINENO (LINENUM))
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static void assign_type_number PARAMS ((tree, const char *, int));
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static void xcoffout_block PARAMS ((tree, int, tree));
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static void xcoffout_source_file PARAMS ((FILE *, const char *, int));
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/* Support routines for XCOFF debugging info. */
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/* Assign NUMBER as the stabx type number for the type described by NAME.
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Search all decls in the list SYMS to find the type NAME. */
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static void
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assign_type_number (syms, name, number)
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tree syms;
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const char *name;
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int number;
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{
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tree decl;
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for (decl = syms; decl; decl = TREE_CHAIN (decl))
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if (DECL_NAME (decl)
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&& strcmp (IDENTIFIER_POINTER (DECL_NAME (decl)), name) == 0)
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{
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TREE_ASM_WRITTEN (decl) = 1;
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TYPE_SYMTAB_ADDRESS (TREE_TYPE (decl)) = number;
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}
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}
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/* Setup gcc primitive types to use the XCOFF built-in type numbers where
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possible. */
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void
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xcoff_output_standard_types (syms)
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tree syms;
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{
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/* Handle built-in C types here. */
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assign_type_number (syms, "int", -1);
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assign_type_number (syms, "char", -2);
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assign_type_number (syms, "short int", -3);
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assign_type_number (syms, "long int", (TARGET_64BIT ? -31 : -4));
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assign_type_number (syms, "unsigned char", -5);
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assign_type_number (syms, "signed char", -6);
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assign_type_number (syms, "short unsigned int", -7);
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assign_type_number (syms, "unsigned int", -8);
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/* No such type "unsigned". */
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assign_type_number (syms, "long unsigned int", (TARGET_64BIT ? -32 : -10));
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assign_type_number (syms, "void", -11);
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assign_type_number (syms, "float", -12);
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assign_type_number (syms, "double", -13);
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assign_type_number (syms, "long double", -14);
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/* Pascal and Fortran types run from -15 to -29. */
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assign_type_number (syms, "wchar", -30);
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assign_type_number (syms, "long long int", -31);
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assign_type_number (syms, "long long unsigned int", -32);
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/* Additional Fortran types run from -33 to -37. */
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/* ??? Should also handle built-in C++ and Obj-C types. There perhaps
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aren't any that C doesn't already have. */
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}
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/* Print an error message for unrecognized stab codes. */
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#define UNKNOWN_STAB(STR) \
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internal_error ("no sclass for %s stab (0x%x)\n", STR, stab)
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/* Conversion routine from BSD stabs to AIX storage classes. */
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int
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stab_to_sclass (stab)
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int stab;
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{
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switch (stab)
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{
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case N_GSYM:
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return C_GSYM;
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case N_FNAME:
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UNKNOWN_STAB ("N_FNAME");
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case N_FUN:
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return C_FUN;
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case N_STSYM:
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case N_LCSYM:
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return C_STSYM;
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case N_MAIN:
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UNKNOWN_STAB ("N_MAIN");
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case N_RSYM:
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return C_RSYM;
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case N_SSYM:
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UNKNOWN_STAB ("N_SSYM");
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case N_RPSYM:
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return C_RPSYM;
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case N_PSYM:
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return C_PSYM;
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case N_LSYM:
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return C_LSYM;
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case N_DECL:
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return C_DECL;
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case N_ENTRY:
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return C_ENTRY;
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case N_SO:
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UNKNOWN_STAB ("N_SO");
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case N_SOL:
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UNKNOWN_STAB ("N_SOL");
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case N_SLINE:
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UNKNOWN_STAB ("N_SLINE");
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case N_DSLINE:
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UNKNOWN_STAB ("N_DSLINE");
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case N_BSLINE:
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UNKNOWN_STAB ("N_BSLINE");
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case N_BINCL:
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UNKNOWN_STAB ("N_BINCL");
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case N_EINCL:
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UNKNOWN_STAB ("N_EINCL");
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case N_EXCL:
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UNKNOWN_STAB ("N_EXCL");
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case N_LBRAC:
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UNKNOWN_STAB ("N_LBRAC");
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case N_RBRAC:
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UNKNOWN_STAB ("N_RBRAC");
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case N_BCOMM:
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return C_BCOMM;
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case N_ECOMM:
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return C_ECOMM;
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case N_ECOML:
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return C_ECOML;
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case N_LENG:
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UNKNOWN_STAB ("N_LENG");
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case N_PC:
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UNKNOWN_STAB ("N_PC");
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case N_M2C:
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UNKNOWN_STAB ("N_M2C");
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case N_SCOPE:
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UNKNOWN_STAB ("N_SCOPE");
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case N_CATCH:
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UNKNOWN_STAB ("N_CATCH");
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case N_OPT:
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UNKNOWN_STAB ("N_OPT");
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default:
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UNKNOWN_STAB ("?");
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}
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}
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/* Output debugging info to FILE to switch to sourcefile FILENAME.
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INLINE_P is true if this is from an inlined function. */
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static void
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xcoffout_source_file (file, filename, inline_p)
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FILE *file;
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const char *filename;
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int inline_p;
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{
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if (filename
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&& (xcoff_lastfile == 0 || strcmp (filename, xcoff_lastfile)
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|| (inline_p && ! xcoff_inlining)
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|| (! inline_p && xcoff_inlining)))
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{
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if (xcoff_current_include_file)
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{
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fprintf (file, "\t.ei\t");
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output_quoted_string (file, xcoff_current_include_file);
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fprintf (file, "\n");
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xcoff_current_include_file = NULL;
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}
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xcoff_inlining = inline_p;
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if (strcmp (main_input_filename, filename) || inline_p)
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{
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fprintf (file, "\t.bi\t");
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output_quoted_string (file, filename);
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fprintf (file, "\n");
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xcoff_current_include_file = filename;
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}
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xcoff_lastfile = filename;
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}
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}
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/* Output a line number symbol entry for location (FILENAME, LINE). */
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void
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xcoffout_source_line (line, filename)
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unsigned int line;
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const char *filename;
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{
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bool inline_p = (strcmp (xcoff_current_function_file, filename) != 0
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|| (int) line < xcoff_begin_function_line);
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xcoffout_source_file (asm_out_file, filename, inline_p);
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ASM_OUTPUT_SOURCE_LINE (asm_out_file, line);
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}
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/* Output the symbols defined in block number DO_BLOCK.
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This function works by walking the tree structure of blocks,
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counting blocks until it finds the desired block. */
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static int do_block = 0;
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static void
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xcoffout_block (block, depth, args)
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tree block;
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int depth;
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tree args;
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{
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while (block)
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{
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/* Ignore blocks never expanded or otherwise marked as real. */
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if (TREE_USED (block))
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{
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/* When we reach the specified block, output its symbols. */
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if (BLOCK_NUMBER (block) == do_block)
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{
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/* Output the syms of the block. */
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if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0)
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dbxout_syms (BLOCK_VARS (block));
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if (args)
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dbxout_reg_parms (args);
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/* We are now done with the block. Don't go to inner blocks. */
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return;
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}
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/* If we are past the specified block, stop the scan. */
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else if (BLOCK_NUMBER (block) >= do_block)
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return;
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/* Output the subblocks. */
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xcoffout_block (BLOCK_SUBBLOCKS (block), depth + 1, NULL_TREE);
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}
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block = BLOCK_CHAIN (block);
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}
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}
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/* Describe the beginning of an internal block within a function.
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Also output descriptions of variables defined in this block.
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N is the number of the block, by order of beginning, counting from 1,
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and not counting the outermost (function top-level) block.
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The blocks match the BLOCKs in DECL_INITIAL (current_function_decl),
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if the count starts at 0 for the outermost one. */
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void
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xcoffout_begin_block (line, n)
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unsigned int line;
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unsigned int n;
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{
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tree decl = current_function_decl;
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/* The IBM AIX compiler does not emit a .bb for the function level scope,
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so we avoid it here also. */
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if (n != 1)
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ASM_OUTPUT_LBB (asm_out_file, line, n);
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do_block = n;
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xcoffout_block (DECL_INITIAL (decl), 0, DECL_ARGUMENTS (decl));
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}
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/* Describe the end line-number of an internal block within a function. */
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void
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xcoffout_end_block (line, n)
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unsigned int line;
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unsigned int n;
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{
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if (n != 1)
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ASM_OUTPUT_LBE (asm_out_file, line, n);
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}
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/* Called at beginning of function (before prologue).
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Declare function as needed for debugging. */
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void
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xcoffout_declare_function (file, decl, name)
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FILE *file;
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tree decl;
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const char *name;
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{
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int i;
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if (*name == '*')
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name++;
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else
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for (i = 0; name[i]; ++i)
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{
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if (name[i] == '[')
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{
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char *n = (char *) alloca (i + 1);
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strncpy (n, name, i);
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n[i] = '\0';
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name = n;
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break;
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}
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}
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/* Any pending .bi or .ei must occur before the .function pseudo op.
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Otherwise debuggers will think that the function is in the previous
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file and/or at the wrong line number. */
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xcoffout_source_file (file, DECL_SOURCE_FILE (decl), 0);
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dbxout_symbol (decl, 0);
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/* .function NAME, TOP, MAPPING, TYPE, SIZE
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16 and 044 are placeholders for backwards compatibility */
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fprintf (file, "\t.function .%s,.%s,16,044,FE..%s-.%s\n",
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name, name, name, name);
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}
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/* Called at beginning of function body (at start of prologue).
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Record the function's starting line number, so we can output
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relative line numbers for the other lines.
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Record the file name that this function is contained in. */
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void
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xcoffout_begin_prologue (line, file)
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unsigned int line;
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const char *file ATTRIBUTE_UNUSED;
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{
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ASM_OUTPUT_LFB (asm_out_file, line);
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dbxout_parms (DECL_ARGUMENTS (current_function_decl));
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/* Emit the symbols for the outermost BLOCK's variables. sdbout.c does this
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in sdbout_begin_block, but there is no guarantee that there will be any
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inner block 1, so we must do it here. This gives a result similar to
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dbxout, so it does make some sense. */
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do_block = BLOCK_NUMBER (DECL_INITIAL (current_function_decl));
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xcoffout_block (DECL_INITIAL (current_function_decl), 0,
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DECL_ARGUMENTS (current_function_decl));
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ASM_OUTPUT_SOURCE_LINE (asm_out_file, line);
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}
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/* Called at end of function (before epilogue).
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Describe end of outermost block. */
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void
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xcoffout_end_function (last_linenum)
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unsigned int last_linenum;
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{
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ASM_OUTPUT_LFE (asm_out_file, last_linenum);
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}
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/* Output xcoff info for the absolute end of a function.
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Called after the epilogue is output. */
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void
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xcoffout_end_epilogue ()
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{
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/* We need to pass the correct function size to .function, otherwise,
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the xas assembler can't figure out the correct size for the function
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aux entry. So, we emit a label after the last instruction which can
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be used by the .function pseudo op to calculate the function size. */
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const char *fname = XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0);
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if (*fname == '*')
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++fname;
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fprintf (asm_out_file, "FE..");
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ASM_OUTPUT_LABEL (asm_out_file, fname);
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}
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#endif /* XCOFF_DEBUGGING_INFO */
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