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- /* Output xcoff-format symbol table information from GNU compiler.
- Copyright (C) 1992 Free Software Foundation, Inc.
-
- This file is part of GNU CC.
-
- GNU CC is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- GNU CC is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU CC; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-
- /* Output xcoff-format symbol table data. The main functionality is contained
- in dbxout.c. This file implements the sdbout-like parts of the xcoff
- interface. Many functions are very similar to their counterparts in
- sdbout.c. */
-
- /* Include this first, because it may define MIN and MAX. */
- #include <stdio.h>
-
- #include "config.h"
- #include "tree.h"
- #include "rtl.h"
- #include "flags.h"
-
- #ifdef XCOFF_DEBUGGING_INFO
-
- /* This defines the C_* storage classes. */
- #include <dbxstclass.h>
-
- #include "xcoffout.h"
-
- #if defined (USG) || defined (NO_STAB_H)
- #include "gstab.h"
- #else
- #include <stab.h>
-
- /* This is a GNU extension we need to reference in this file. */
- #ifndef N_CATCH
- #define N_CATCH 0x54
- #endif
- #endif
-
- /* These are GNU extensions we need to reference in this file. */
- #ifndef N_DSLINE
- #define N_DSLINE 0x46
- #endif
- #ifndef N_BSLINE
- #define N_BSLINE 0x48
- #endif
-
- /* Line number of beginning of current function, minus one.
- Negative means not in a function or not using xcoff. */
-
- int xcoff_begin_function_line = -1;
-
- /* Name of the current include file. */
-
- char *xcoff_current_include_file;
-
- /* Name of the current function file. This is the file the `.bf' is
- emitted from. In case a line is emitted from a different file,
- (by including that file of course), then the line number will be
- absolute. */
-
- char *xcoff_current_function_file;
-
- /* Names of bss and data sections. These should be unique names for each
- compilation unit. */
-
- char *xcoff_bss_section_name;
- char *xcoff_private_data_section_name;
- char *xcoff_read_only_section_name;
-
- /* Macro definitions used below. */
- /* Ensure we don't output a negative line number. */
- #define MAKE_LINE_SAFE(LINE) \
- if (LINE <= xcoff_begin_function_line) \
- LINE = xcoff_begin_function_line + 1 \
-
- #define ASM_OUTPUT_LFB(FILE,LINENUM) \
- { \
- if (xcoff_begin_function_line == -1) \
- { \
- xcoff_begin_function_line = (LINENUM) - 1;\
- fprintf (FILE, "\t.bf\t%d\n", (LINENUM)); \
- } \
- xcoff_current_function_file \
- = (xcoff_current_include_file \
- ? xcoff_current_include_file : main_input_filename); \
- }
-
- #define ASM_OUTPUT_LFE(FILE,LINENUM) \
- do { \
- int linenum = LINENUM; \
- MAKE_LINE_SAFE (linenum); \
- fprintf (FILE, "\t.ef\t%d\n", ABS_OR_RELATIVE_LINENO (linenum)); \
- xcoff_begin_function_line = -1; \
- } while (0)
-
- #define ASM_OUTPUT_LBB(FILE,LINENUM,BLOCKNUM) \
- do { \
- int linenum = LINENUM; \
- MAKE_LINE_SAFE (linenum); \
- fprintf (FILE, "\t.bb\t%d\n", ABS_OR_RELATIVE_LINENO (linenum)); \
- } while (0)
-
- #define ASM_OUTPUT_LBE(FILE,LINENUM,BLOCKNUM) \
- do { \
- int linenum = LINENUM; \
- MAKE_LINE_SAFE (linenum); \
- fprintf (FILE, "\t.eb\t%d\n", ABS_OR_RELATIVE_LINENO (linenum)); \
- } while (0)
-
- /* Support routines for XCOFF debugging info. */
-
- /* Assign NUMBER as the stabx type number for the type described by NAME.
- Search all decls in the list SYMS to find the type NAME. */
-
- static void
- assign_type_number (syms, name, number)
- tree syms;
- char *name;
- int number;
- {
- tree decl;
-
- for (decl = syms; decl; decl = TREE_CHAIN (decl))
- if (DECL_NAME (decl)
- && strcmp (IDENTIFIER_POINTER (DECL_NAME (decl)), name) == 0)
- {
- TREE_ASM_WRITTEN (decl) = 1;
- TYPE_SYMTAB_ADDRESS (TREE_TYPE (decl)) = number;
- }
- }
-
- /* Setup gcc primitive types to use the XCOFF built-in type numbers where
- possible. */
-
- void
- xcoff_output_standard_types (syms)
- tree syms;
- {
- /* Handle built-in C types here. */
-
- assign_type_number (syms, "int", -1);
- assign_type_number (syms, "char", -2);
- assign_type_number (syms, "short int", -3);
- assign_type_number (syms, "long int", -4);
- assign_type_number (syms, "unsigned char", -5);
- assign_type_number (syms, "signed char", -6);
- assign_type_number (syms, "short unsigned int", -7);
- assign_type_number (syms, "unsigned int", -8);
- /* No such type "unsigned". */
- assign_type_number (syms, "long unsigned int", -10);
- assign_type_number (syms, "void", -11);
- assign_type_number (syms, "float", -12);
- assign_type_number (syms, "double", -13);
- assign_type_number (syms, "long double", -14);
- /* Pascal and Fortran types run from -15 to -29. */
- /* No such type "wchar". */
-
- /* "long long int", and "long long unsigned int", are not handled here,
- because there are no predefined types that match them. */
-
- /* ??? Should also handle built-in C++ and Obj-C types. There perhaps
- aren't any that C doesn't already have. */
- }
-
- /* Print an error message for unrecognized stab codes. */
-
- #define UNKNOWN_STAB(STR) \
- do { \
- fprintf(stderr, "Error, unknown stab %s: : 0x%x\n", STR, stab); \
- fflush (stderr); \
- } while (0)
-
- /* Conversion routine from BSD stabs to AIX storage classes. */
-
- int
- stab_to_sclass (stab)
- int stab;
- {
- switch (stab)
- {
- case N_GSYM:
- return C_GSYM;
-
- case N_FNAME:
- UNKNOWN_STAB ("N_FNAME");
- abort();
-
- case N_FUN:
- return C_FUN;
-
- case N_STSYM:
- case N_LCSYM:
- return C_STSYM;
-
- case N_MAIN:
- UNKNOWN_STAB ("N_MAIN");
- abort ();
-
- case N_RSYM:
- return C_RSYM;
-
- case N_SSYM:
- UNKNOWN_STAB ("N_SSYM");
- abort ();
-
- case N_RPSYM:
- return C_RPSYM;
-
- case N_PSYM:
- return C_PSYM;
- case N_LSYM:
- return C_LSYM;
- case N_DECL:
- return C_DECL;
- case N_ENTRY:
- return C_ENTRY;
-
- case N_SO:
- UNKNOWN_STAB ("N_SO");
- abort ();
-
- case N_SOL:
- UNKNOWN_STAB ("N_SOL");
- abort ();
-
- case N_SLINE:
- UNKNOWN_STAB ("N_SLINE");
- abort ();
-
- case N_DSLINE:
- UNKNOWN_STAB ("N_DSLINE");
- abort ();
-
- case N_BSLINE:
- UNKNOWN_STAB ("N_BSLINE");
- abort ();
- #if 0
- /* This has the same value as N_BSLINE. */
- case N_BROWS:
- UNKNOWN_STAB ("N_BROWS");
- abort ();
- #endif
-
- case N_BINCL:
- UNKNOWN_STAB ("N_BINCL");
- abort ();
-
- case N_EINCL:
- UNKNOWN_STAB ("N_EINCL");
- abort ();
-
- case N_EXCL:
- UNKNOWN_STAB ("N_EXCL");
- abort ();
-
- case N_LBRAC:
- UNKNOWN_STAB ("N_LBRAC");
- abort ();
-
- case N_RBRAC:
- UNKNOWN_STAB ("N_RBRAC");
- abort ();
-
- case N_BCOMM:
- return C_BCOMM;
- case N_ECOMM:
- return C_ECOMM;
- case N_ECOML:
- return C_ECOML;
-
- case N_LENG:
- UNKNOWN_STAB ("N_LENG");
- abort ();
-
- case N_PC:
- UNKNOWN_STAB ("N_PC");
- abort ();
-
- case N_M2C:
- UNKNOWN_STAB ("N_M2C");
- abort ();
-
- case N_SCOPE:
- UNKNOWN_STAB ("N_SCOPE");
- abort ();
-
- case N_CATCH:
- UNKNOWN_STAB ("N_CATCH");
- abort ();
-
- default:
- UNKNOWN_STAB ("default");
- abort ();
- }
- }
-
- /* In XCOFF, we have to have this .bf before the function prologue.
- Rely on the value of `dbx_begin_function_line' not to duplicate .bf. */
-
- void
- xcoffout_output_first_source_line (file, last_linenum)
- FILE *file;
- int last_linenum;
- {
- ASM_OUTPUT_LFB (file, last_linenum);
- dbxout_parms (DECL_ARGUMENTS (current_function_decl));
- ASM_OUTPUT_SOURCE_LINE (file, last_linenum);
- }
-
- /* Output the symbols defined in block number DO_BLOCK.
- Set NEXT_BLOCK_NUMBER to 0 before calling.
-
- This function works by walking the tree structure of blocks,
- counting blocks until it finds the desired block. */
-
- static int do_block = 0;
-
- static int next_block_number;
-
- static void
- xcoffout_block (block, depth, args)
- register tree block;
- int depth;
- tree args;
- {
- while (block)
- {
- /* Ignore blocks never expanded or otherwise marked as real. */
- if (TREE_USED (block))
- {
- /* When we reach the specified block, output its symbols. */
- if (next_block_number == do_block)
- {
- /* Output the syms of the block. */
- if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0)
- dbxout_syms (BLOCK_VARS (block));
- if (args)
- dbxout_reg_parms (args);
-
- /* We are now done with the block. Don't go to inner blocks. */
- return;
- }
- /* If we are past the specified block, stop the scan. */
- else if (next_block_number >= do_block)
- return;
-
- next_block_number++;
-
- /* Output the subblocks. */
- xcoffout_block (BLOCK_SUBBLOCKS (block), depth + 1, NULL_TREE);
- }
- block = BLOCK_CHAIN (block);
- }
- }
-
- /* Describe the beginning of an internal block within a function.
- Also output descriptions of variables defined in this block.
-
- N is the number of the block, by order of beginning, counting from 1,
- and not counting the outermost (function top-level) block.
- The blocks match the BLOCKs in DECL_INITIAL (current_function_decl),
- if the count starts at 0 for the outermost one. */
-
- void
- xcoffout_begin_block (file, line, n)
- FILE *file;
- int line;
- int n;
- {
- tree decl = current_function_decl;
-
- ASM_OUTPUT_LBB (file, line, n);
-
- do_block = n;
- next_block_number = 0;
- xcoffout_block (DECL_INITIAL (decl), 0, DECL_ARGUMENTS (decl));
- }
-
- /* Describe the end line-number of an internal block within a function. */
-
- void
- xcoffout_end_block (file, line, n)
- FILE *file;
- int line;
- int n;
- {
- ASM_OUTPUT_LBE (file, line, n);
- }
-
- /* Called at beginning of function (before prologue).
- Declare function as needed for debugging. */
-
- void
- xcoffout_declare_function (file, decl, name)
- FILE *file;
- tree decl;
- char *name;
- {
- char *n = name;
- int i;
-
- for (i = 0; name[i]; ++i)
- {
- if (name[i] == '[')
- {
- n = (char *) alloca (i + 1);
- strncpy (n, name, i);
- n[i] = '\0';
- break;
- }
- }
-
- dbxout_symbol (decl, 0);
- fprintf (file, "\t.function .%s,.%s,16,044,FE..%s-.%s\n", n, n, n, n);
- }
-
- /* Called at beginning of function body (after prologue).
- Record the function's starting line number, so we can output
- relative line numbers for the other lines.
- Record the file name that this function is contained in. */
-
- void
- xcoffout_begin_function (file, last_linenum)
- FILE *file;
- int last_linenum;
- {
- ASM_OUTPUT_LFB (file, last_linenum);
- }
-
- /* Called at end of function (before epilogue).
- Describe end of outermost block. */
-
- void
- xcoffout_end_function (file, last_linenum)
- FILE *file;
- int last_linenum;
- {
- ASM_OUTPUT_LFE (file, last_linenum);
- }
-
- /* Output xcoff info for the absolute end of a function.
- Called after the epilogue is output. */
-
- void
- xcoffout_end_epilogue (file)
- FILE *file;
- {
- /* We need to pass the correct function size to .function, otherwise,
- the xas assembler can't figure out the correct size for the function
- aux entry. So, we emit a label after the last instruction which can
- be used by the .function pseudo op to calculate the function size. */
-
- char *fname = XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0);
- if (*fname == '*')
- ++fname;
- fprintf (file, "FE..");
- ASM_OUTPUT_LABEL (file, fname);
- }
- #endif /* XCOFF_DEBUGGING_INFO */
-