/* dwarf2dbg.c - DWARF2 debug support
|
/* dwarf2dbg.c - DWARF2 debug support
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Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
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Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
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Free Software Foundation, Inc.
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Free Software Foundation, Inc.
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Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
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Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
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|
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This file is part of GAS, the GNU Assembler.
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This file is part of GAS, the GNU Assembler.
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|
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GAS is free software; you can redistribute it and/or modify
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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any later version.
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|
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GAS is distributed in the hope that it will be useful,
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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GNU General Public License for more details.
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|
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to the Free
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along with GAS; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
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Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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02110-1301, USA. */
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/* Logical line numbers can be controlled by the compiler via the
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/* Logical line numbers can be controlled by the compiler via the
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following directives:
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following directives:
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|
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.file FILENO "file.c"
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.file FILENO "file.c"
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.loc FILENO LINENO [COLUMN] [basic_block] [prologue_end] \
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.loc FILENO LINENO [COLUMN] [basic_block] [prologue_end] \
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[epilogue_begin] [is_stmt VALUE] [isa VALUE] \
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[epilogue_begin] [is_stmt VALUE] [isa VALUE] \
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[discriminator VALUE]
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[discriminator VALUE]
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*/
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*/
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#include "as.h"
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#include "as.h"
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#include "safe-ctype.h"
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#include "safe-ctype.h"
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|
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#ifdef HAVE_LIMITS_H
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#ifdef HAVE_LIMITS_H
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#include <limits.h>
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#include <limits.h>
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#else
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#else
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#ifdef HAVE_SYS_PARAM_H
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#ifdef HAVE_SYS_PARAM_H
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#include <sys/param.h>
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#include <sys/param.h>
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#endif
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#endif
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#ifndef INT_MAX
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#ifndef INT_MAX
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#define INT_MAX (int) (((unsigned) (-1)) >> 1)
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#define INT_MAX (int) (((unsigned) (-1)) >> 1)
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#endif
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#endif
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#endif
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#endif
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#include "dwarf2dbg.h"
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#include "dwarf2dbg.h"
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#include <filenames.h>
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#include <filenames.h>
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#ifdef HAVE_DOS_BASED_FILE_SYSTEM
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#ifdef HAVE_DOS_BASED_FILE_SYSTEM
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/* We need to decide which character to use as a directory separator.
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/* We need to decide which character to use as a directory separator.
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Just because HAVE_DOS_BASED_FILE_SYSTEM is defined, it does not
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Just because HAVE_DOS_BASED_FILE_SYSTEM is defined, it does not
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necessarily mean that the backslash character is the one to use.
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necessarily mean that the backslash character is the one to use.
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Some environments, eg Cygwin, can support both naming conventions.
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Some environments, eg Cygwin, can support both naming conventions.
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So we use the heuristic that we only need to use the backslash if
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So we use the heuristic that we only need to use the backslash if
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the path is an absolute path starting with a DOS style drive
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the path is an absolute path starting with a DOS style drive
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selector. eg C: or D: */
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selector. eg C: or D: */
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# define INSERT_DIR_SEPARATOR(string, offset) \
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# define INSERT_DIR_SEPARATOR(string, offset) \
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do \
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do \
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{ \
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{ \
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if (offset > 1 \
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if (offset > 1 \
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&& string[0] != 0 \
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&& string[0] != 0 \
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&& string[1] == ':') \
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&& string[1] == ':') \
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string [offset] = '\\'; \
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string [offset] = '\\'; \
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else \
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else \
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string [offset] = '/'; \
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string [offset] = '/'; \
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} \
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} \
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while (0)
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while (0)
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#else
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#else
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# define INSERT_DIR_SEPARATOR(string, offset) string[offset] = '/'
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# define INSERT_DIR_SEPARATOR(string, offset) string[offset] = '/'
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#endif
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#endif
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|
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#ifndef DWARF2_FORMAT
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#ifndef DWARF2_FORMAT
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# define DWARF2_FORMAT(SEC) dwarf2_format_32bit
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# define DWARF2_FORMAT(SEC) dwarf2_format_32bit
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#endif
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#endif
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#ifndef DWARF2_ADDR_SIZE
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#ifndef DWARF2_ADDR_SIZE
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# define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8)
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# define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8)
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#endif
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#endif
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|
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#ifndef DWARF2_FILE_NAME
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#ifndef DWARF2_FILE_NAME
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#define DWARF2_FILE_NAME(FILENAME, DIRNAME) FILENAME
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#define DWARF2_FILE_NAME(FILENAME, DIRNAME) FILENAME
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#endif
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#endif
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|
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#ifndef DWARF2_FILE_TIME_NAME
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#ifndef DWARF2_FILE_TIME_NAME
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#define DWARF2_FILE_TIME_NAME(FILENAME,DIRNAME) 0
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#define DWARF2_FILE_TIME_NAME(FILENAME,DIRNAME) 0
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#endif
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#endif
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|
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#ifndef DWARF2_FILE_SIZE_NAME
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#ifndef DWARF2_FILE_SIZE_NAME
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#define DWARF2_FILE_SIZE_NAME(FILENAME,DIRNAME) 0
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#define DWARF2_FILE_SIZE_NAME(FILENAME,DIRNAME) 0
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#endif
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#endif
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|
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#ifndef DWARF2_VERSION
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#ifndef DWARF2_VERSION
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#define DWARF2_VERSION 2
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#define DWARF2_VERSION 2
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#endif
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#endif
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|
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#include "subsegs.h"
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#include "subsegs.h"
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|
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#include "dwarf2.h"
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#include "dwarf2.h"
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|
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/* Since we can't generate the prolog until the body is complete, we
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/* Since we can't generate the prolog until the body is complete, we
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use three different subsegments for .debug_line: one holding the
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use three different subsegments for .debug_line: one holding the
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prolog, one for the directory and filename info, and one for the
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prolog, one for the directory and filename info, and one for the
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body ("statement program"). */
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body ("statement program"). */
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#define DL_PROLOG 0
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#define DL_PROLOG 0
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#define DL_FILES 1
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#define DL_FILES 1
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#define DL_BODY 2
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#define DL_BODY 2
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|
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/* If linker relaxation might change offsets in the code, the DWARF special
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/* If linker relaxation might change offsets in the code, the DWARF special
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opcodes and variable-length operands cannot be used. If this macro is
|
opcodes and variable-length operands cannot be used. If this macro is
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nonzero, use the DW_LNS_fixed_advance_pc opcode instead. */
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nonzero, use the DW_LNS_fixed_advance_pc opcode instead. */
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#ifndef DWARF2_USE_FIXED_ADVANCE_PC
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#ifndef DWARF2_USE_FIXED_ADVANCE_PC
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# define DWARF2_USE_FIXED_ADVANCE_PC 0
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# define DWARF2_USE_FIXED_ADVANCE_PC 0
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#endif
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#endif
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|
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/* First special line opcde - leave room for the standard opcodes.
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/* First special line opcde - leave room for the standard opcodes.
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Note: If you want to change this, you'll have to update the
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Note: If you want to change this, you'll have to update the
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"standard_opcode_lengths" table that is emitted below in
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"standard_opcode_lengths" table that is emitted below in
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out_debug_line(). */
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out_debug_line(). */
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#define DWARF2_LINE_OPCODE_BASE 13
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#define DWARF2_LINE_OPCODE_BASE 13
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|
|
#ifndef DWARF2_LINE_BASE
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#ifndef DWARF2_LINE_BASE
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/* Minimum line offset in a special line info. opcode. This value
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/* Minimum line offset in a special line info. opcode. This value
|
was chosen to give a reasonable range of values. */
|
was chosen to give a reasonable range of values. */
|
# define DWARF2_LINE_BASE -5
|
# define DWARF2_LINE_BASE -5
|
#endif
|
#endif
|
|
|
/* Range of line offsets in a special line info. opcode. */
|
/* Range of line offsets in a special line info. opcode. */
|
#ifndef DWARF2_LINE_RANGE
|
#ifndef DWARF2_LINE_RANGE
|
# define DWARF2_LINE_RANGE 14
|
# define DWARF2_LINE_RANGE 14
|
#endif
|
#endif
|
|
|
#ifndef DWARF2_LINE_MIN_INSN_LENGTH
|
#ifndef DWARF2_LINE_MIN_INSN_LENGTH
|
/* Define the architecture-dependent minimum instruction length (in
|
/* Define the architecture-dependent minimum instruction length (in
|
bytes). This value should be rather too small than too big. */
|
bytes). This value should be rather too small than too big. */
|
# define DWARF2_LINE_MIN_INSN_LENGTH 1
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# define DWARF2_LINE_MIN_INSN_LENGTH 1
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#endif
|
#endif
|
|
|
/* Flag that indicates the initial value of the is_stmt_start flag. */
|
/* Flag that indicates the initial value of the is_stmt_start flag. */
|
#define DWARF2_LINE_DEFAULT_IS_STMT 1
|
#define DWARF2_LINE_DEFAULT_IS_STMT 1
|
|
|
/* Given a special op, return the line skip amount. */
|
/* Given a special op, return the line skip amount. */
|
#define SPECIAL_LINE(op) \
|
#define SPECIAL_LINE(op) \
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(((op) - DWARF2_LINE_OPCODE_BASE)%DWARF2_LINE_RANGE + DWARF2_LINE_BASE)
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(((op) - DWARF2_LINE_OPCODE_BASE)%DWARF2_LINE_RANGE + DWARF2_LINE_BASE)
|
|
|
/* Given a special op, return the address skip amount (in units of
|
/* Given a special op, return the address skip amount (in units of
|
DWARF2_LINE_MIN_INSN_LENGTH. */
|
DWARF2_LINE_MIN_INSN_LENGTH. */
|
#define SPECIAL_ADDR(op) (((op) - DWARF2_LINE_OPCODE_BASE)/DWARF2_LINE_RANGE)
|
#define SPECIAL_ADDR(op) (((op) - DWARF2_LINE_OPCODE_BASE)/DWARF2_LINE_RANGE)
|
|
|
/* The maximum address skip amount that can be encoded with a special op. */
|
/* The maximum address skip amount that can be encoded with a special op. */
|
#define MAX_SPECIAL_ADDR_DELTA SPECIAL_ADDR(255)
|
#define MAX_SPECIAL_ADDR_DELTA SPECIAL_ADDR(255)
|
|
|
struct line_entry {
|
struct line_entry {
|
struct line_entry *next;
|
struct line_entry *next;
|
symbolS *label;
|
symbolS *label;
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struct dwarf2_line_info loc;
|
struct dwarf2_line_info loc;
|
};
|
};
|
|
|
struct line_subseg {
|
struct line_subseg {
|
struct line_subseg *next;
|
struct line_subseg *next;
|
subsegT subseg;
|
subsegT subseg;
|
struct line_entry *head;
|
struct line_entry *head;
|
struct line_entry **ptail;
|
struct line_entry **ptail;
|
};
|
};
|
|
|
struct line_seg {
|
struct line_seg {
|
struct line_seg *next;
|
struct line_seg *next;
|
segT seg;
|
segT seg;
|
struct line_subseg *head;
|
struct line_subseg *head;
|
symbolS *text_start;
|
symbolS *text_start;
|
symbolS *text_end;
|
symbolS *text_end;
|
};
|
};
|
|
|
/* Collects data for all line table entries during assembly. */
|
/* Collects data for all line table entries during assembly. */
|
static struct line_seg *all_segs;
|
static struct line_seg *all_segs;
|
/* Hash used to quickly lookup a segment by name, avoiding the need to search
|
/* Hash used to quickly lookup a segment by name, avoiding the need to search
|
through the all_segs list. */
|
through the all_segs list. */
|
static struct hash_control *all_segs_hash;
|
static struct hash_control *all_segs_hash;
|
static struct line_seg **last_seg_ptr;
|
static struct line_seg **last_seg_ptr;
|
|
|
struct file_entry {
|
struct file_entry {
|
const char *filename;
|
const char *filename;
|
unsigned int dir;
|
unsigned int dir;
|
};
|
};
|
|
|
/* Table of files used by .debug_line. */
|
/* Table of files used by .debug_line. */
|
static struct file_entry *files;
|
static struct file_entry *files;
|
static unsigned int files_in_use;
|
static unsigned int files_in_use;
|
static unsigned int files_allocated;
|
static unsigned int files_allocated;
|
|
|
/* Table of directories used by .debug_line. */
|
/* Table of directories used by .debug_line. */
|
static char **dirs;
|
static char **dirs;
|
static unsigned int dirs_in_use;
|
static unsigned int dirs_in_use;
|
static unsigned int dirs_allocated;
|
static unsigned int dirs_allocated;
|
|
|
/* TRUE when we've seen a .loc directive recently. Used to avoid
|
/* TRUE when we've seen a .loc directive recently. Used to avoid
|
doing work when there's nothing to do. */
|
doing work when there's nothing to do. */
|
bfd_boolean dwarf2_loc_directive_seen;
|
bfd_boolean dwarf2_loc_directive_seen;
|
|
|
/* TRUE when we're supposed to set the basic block mark whenever a
|
/* TRUE when we're supposed to set the basic block mark whenever a
|
label is seen. */
|
label is seen. */
|
bfd_boolean dwarf2_loc_mark_labels;
|
bfd_boolean dwarf2_loc_mark_labels;
|
|
|
/* Current location as indicated by the most recent .loc directive. */
|
/* Current location as indicated by the most recent .loc directive. */
|
static struct dwarf2_line_info current = {
|
static struct dwarf2_line_info current = {
|
1, 1, 0, 0,
|
1, 1, 0, 0,
|
DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0,
|
DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0,
|
0
|
0
|
};
|
};
|
|
|
/* The size of an address on the target. */
|
/* The size of an address on the target. */
|
static unsigned int sizeof_address;
|
static unsigned int sizeof_address;
|
|
|
static unsigned int get_filenum (const char *, unsigned int);
|
static unsigned int get_filenum (const char *, unsigned int);
|
|
|
#ifndef TC_DWARF2_EMIT_OFFSET
|
#ifndef TC_DWARF2_EMIT_OFFSET
|
#define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset
|
#define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset
|
|
|
/* Create an offset to .dwarf2_*. */
|
/* Create an offset to .dwarf2_*. */
|
|
|
static void
|
static void
|
generic_dwarf2_emit_offset (symbolS *symbol, unsigned int size)
|
generic_dwarf2_emit_offset (symbolS *symbol, unsigned int size)
|
{
|
{
|
expressionS exp;
|
expressionS exp;
|
|
|
exp.X_op = O_symbol;
|
exp.X_op = O_symbol;
|
exp.X_add_symbol = symbol;
|
exp.X_add_symbol = symbol;
|
exp.X_add_number = 0;
|
exp.X_add_number = 0;
|
emit_expr (&exp, size);
|
emit_expr (&exp, size);
|
}
|
}
|
#endif
|
#endif
|
|
|
/* Find or create an entry for SEG+SUBSEG in ALL_SEGS. */
|
/* Find or create an entry for SEG+SUBSEG in ALL_SEGS. */
|
|
|
static struct line_subseg *
|
static struct line_subseg *
|
get_line_subseg (segT seg, subsegT subseg)
|
get_line_subseg (segT seg, subsegT subseg)
|
{
|
{
|
static segT last_seg;
|
static segT last_seg;
|
static subsegT last_subseg;
|
static subsegT last_subseg;
|
static struct line_subseg *last_line_subseg;
|
static struct line_subseg *last_line_subseg;
|
|
|
struct line_seg *s;
|
struct line_seg *s;
|
struct line_subseg **pss, *lss;
|
struct line_subseg **pss, *lss;
|
|
|
if (seg == last_seg && subseg == last_subseg)
|
if (seg == last_seg && subseg == last_subseg)
|
return last_line_subseg;
|
return last_line_subseg;
|
|
|
s = (struct line_seg *) hash_find (all_segs_hash, seg->name);
|
s = (struct line_seg *) hash_find (all_segs_hash, seg->name);
|
if (s == NULL)
|
if (s == NULL)
|
{
|
{
|
s = (struct line_seg *) xmalloc (sizeof (*s));
|
s = (struct line_seg *) xmalloc (sizeof (*s));
|
s->next = NULL;
|
s->next = NULL;
|
s->seg = seg;
|
s->seg = seg;
|
s->head = NULL;
|
s->head = NULL;
|
*last_seg_ptr = s;
|
*last_seg_ptr = s;
|
last_seg_ptr = &s->next;
|
last_seg_ptr = &s->next;
|
hash_insert (all_segs_hash, seg->name, s);
|
hash_insert (all_segs_hash, seg->name, s);
|
}
|
}
|
gas_assert (seg == s->seg);
|
gas_assert (seg == s->seg);
|
|
|
for (pss = &s->head; (lss = *pss) != NULL ; pss = &lss->next)
|
for (pss = &s->head; (lss = *pss) != NULL ; pss = &lss->next)
|
{
|
{
|
if (lss->subseg == subseg)
|
if (lss->subseg == subseg)
|
goto found_subseg;
|
goto found_subseg;
|
if (lss->subseg > subseg)
|
if (lss->subseg > subseg)
|
break;
|
break;
|
}
|
}
|
|
|
lss = (struct line_subseg *) xmalloc (sizeof (*lss));
|
lss = (struct line_subseg *) xmalloc (sizeof (*lss));
|
lss->next = *pss;
|
lss->next = *pss;
|
lss->subseg = subseg;
|
lss->subseg = subseg;
|
lss->head = NULL;
|
lss->head = NULL;
|
lss->ptail = &lss->head;
|
lss->ptail = &lss->head;
|
*pss = lss;
|
*pss = lss;
|
|
|
found_subseg:
|
found_subseg:
|
last_seg = seg;
|
last_seg = seg;
|
last_subseg = subseg;
|
last_subseg = subseg;
|
last_line_subseg = lss;
|
last_line_subseg = lss;
|
|
|
return lss;
|
return lss;
|
}
|
}
|
|
|
/* Record an entry for LOC occurring at LABEL. */
|
/* Record an entry for LOC occurring at LABEL. */
|
|
|
static void
|
static void
|
dwarf2_gen_line_info_1 (symbolS *label, struct dwarf2_line_info *loc)
|
dwarf2_gen_line_info_1 (symbolS *label, struct dwarf2_line_info *loc)
|
{
|
{
|
struct line_subseg *lss;
|
struct line_subseg *lss;
|
struct line_entry *e;
|
struct line_entry *e;
|
|
|
e = (struct line_entry *) xmalloc (sizeof (*e));
|
e = (struct line_entry *) xmalloc (sizeof (*e));
|
e->next = NULL;
|
e->next = NULL;
|
e->label = label;
|
e->label = label;
|
e->loc = *loc;
|
e->loc = *loc;
|
|
|
lss = get_line_subseg (now_seg, now_subseg);
|
lss = get_line_subseg (now_seg, now_subseg);
|
*lss->ptail = e;
|
*lss->ptail = e;
|
lss->ptail = &e->next;
|
lss->ptail = &e->next;
|
}
|
}
|
|
|
/* Record an entry for LOC occurring at OFS within the current fragment. */
|
/* Record an entry for LOC occurring at OFS within the current fragment. */
|
|
|
void
|
void
|
dwarf2_gen_line_info (addressT ofs, struct dwarf2_line_info *loc)
|
dwarf2_gen_line_info (addressT ofs, struct dwarf2_line_info *loc)
|
{
|
{
|
static unsigned int line = -1;
|
static unsigned int line = -1;
|
static unsigned int filenum = -1;
|
static unsigned int filenum = -1;
|
|
|
symbolS *sym;
|
symbolS *sym;
|
|
|
/* Early out for as-yet incomplete location information. */
|
/* Early out for as-yet incomplete location information. */
|
if (loc->filenum == 0 || loc->line == 0)
|
if (loc->filenum == 0 || loc->line == 0)
|
return;
|
return;
|
|
|
/* Don't emit sequences of line symbols for the same line when the
|
/* Don't emit sequences of line symbols for the same line when the
|
symbols apply to assembler code. It is necessary to emit
|
symbols apply to assembler code. It is necessary to emit
|
duplicate line symbols when a compiler asks for them, because GDB
|
duplicate line symbols when a compiler asks for them, because GDB
|
uses them to determine the end of the prologue. */
|
uses them to determine the end of the prologue. */
|
if (debug_type == DEBUG_DWARF2
|
if (debug_type == DEBUG_DWARF2
|
&& line == loc->line && filenum == loc->filenum)
|
&& line == loc->line && filenum == loc->filenum)
|
return;
|
return;
|
|
|
line = loc->line;
|
line = loc->line;
|
filenum = loc->filenum;
|
filenum = loc->filenum;
|
|
|
sym = symbol_temp_new (now_seg, ofs, frag_now);
|
sym = symbol_temp_new (now_seg, ofs, frag_now);
|
dwarf2_gen_line_info_1 (sym, loc);
|
dwarf2_gen_line_info_1 (sym, loc);
|
}
|
}
|
|
|
/* Returns the current source information. If .file directives have
|
/* Returns the current source information. If .file directives have
|
been encountered, the info for the corresponding source file is
|
been encountered, the info for the corresponding source file is
|
returned. Otherwise, the info for the assembly source file is
|
returned. Otherwise, the info for the assembly source file is
|
returned. */
|
returned. */
|
|
|
void
|
void
|
dwarf2_where (struct dwarf2_line_info *line)
|
dwarf2_where (struct dwarf2_line_info *line)
|
{
|
{
|
if (debug_type == DEBUG_DWARF2)
|
if (debug_type == DEBUG_DWARF2)
|
{
|
{
|
char *filename;
|
char *filename;
|
as_where (&filename, &line->line);
|
as_where (&filename, &line->line);
|
line->filenum = get_filenum (filename, 0);
|
line->filenum = get_filenum (filename, 0);
|
line->column = 0;
|
line->column = 0;
|
line->flags = DWARF2_FLAG_IS_STMT;
|
line->flags = DWARF2_FLAG_IS_STMT;
|
line->isa = current.isa;
|
line->isa = current.isa;
|
line->discriminator = current.discriminator;
|
line->discriminator = current.discriminator;
|
}
|
}
|
else
|
else
|
*line = current;
|
*line = current;
|
}
|
}
|
|
|
/* A hook to allow the target backend to inform the line number state
|
/* A hook to allow the target backend to inform the line number state
|
machine of isa changes when assembler debug info is enabled. */
|
machine of isa changes when assembler debug info is enabled. */
|
|
|
void
|
void
|
dwarf2_set_isa (unsigned int isa)
|
dwarf2_set_isa (unsigned int isa)
|
{
|
{
|
current.isa = isa;
|
current.isa = isa;
|
}
|
}
|
|
|
/* Called for each machine instruction, or relatively atomic group of
|
/* Called for each machine instruction, or relatively atomic group of
|
machine instructions (ie built-in macro). The instruction or group
|
machine instructions (ie built-in macro). The instruction or group
|
is SIZE bytes in length. If dwarf2 line number generation is called
|
is SIZE bytes in length. If dwarf2 line number generation is called
|
for, emit a line statement appropriately. */
|
for, emit a line statement appropriately. */
|
|
|
void
|
void
|
dwarf2_emit_insn (int size)
|
dwarf2_emit_insn (int size)
|
{
|
{
|
struct dwarf2_line_info loc;
|
struct dwarf2_line_info loc;
|
|
|
if (!dwarf2_loc_directive_seen && debug_type != DEBUG_DWARF2)
|
if (!dwarf2_loc_directive_seen && debug_type != DEBUG_DWARF2)
|
return;
|
return;
|
|
|
dwarf2_where (&loc);
|
dwarf2_where (&loc);
|
|
|
dwarf2_gen_line_info (frag_now_fix () - size, &loc);
|
dwarf2_gen_line_info (frag_now_fix () - size, &loc);
|
dwarf2_consume_line_info ();
|
dwarf2_consume_line_info ();
|
}
|
}
|
|
|
/* Called after the current line information has been either used with
|
/* Called after the current line information has been either used with
|
dwarf2_gen_line_info or saved with a machine instruction for later use.
|
dwarf2_gen_line_info or saved with a machine instruction for later use.
|
This resets the state of the line number information to reflect that
|
This resets the state of the line number information to reflect that
|
it has been used. */
|
it has been used. */
|
|
|
void
|
void
|
dwarf2_consume_line_info (void)
|
dwarf2_consume_line_info (void)
|
{
|
{
|
/* Unless we generate DWARF2 debugging information for each
|
/* Unless we generate DWARF2 debugging information for each
|
assembler line, we only emit one line symbol for one LOC. */
|
assembler line, we only emit one line symbol for one LOC. */
|
dwarf2_loc_directive_seen = FALSE;
|
dwarf2_loc_directive_seen = FALSE;
|
|
|
current.flags &= ~(DWARF2_FLAG_BASIC_BLOCK
|
current.flags &= ~(DWARF2_FLAG_BASIC_BLOCK
|
| DWARF2_FLAG_PROLOGUE_END
|
| DWARF2_FLAG_PROLOGUE_END
|
| DWARF2_FLAG_EPILOGUE_BEGIN);
|
| DWARF2_FLAG_EPILOGUE_BEGIN);
|
current.discriminator = 0;
|
current.discriminator = 0;
|
}
|
}
|
|
|
/* Called for each (preferably code) label. If dwarf2_loc_mark_labels
|
/* Called for each (preferably code) label. If dwarf2_loc_mark_labels
|
is enabled, emit a basic block marker. */
|
is enabled, emit a basic block marker. */
|
|
|
void
|
void
|
dwarf2_emit_label (symbolS *label)
|
dwarf2_emit_label (symbolS *label)
|
{
|
{
|
struct dwarf2_line_info loc;
|
struct dwarf2_line_info loc;
|
|
|
if (!dwarf2_loc_mark_labels)
|
if (!dwarf2_loc_mark_labels)
|
return;
|
return;
|
if (S_GET_SEGMENT (label) != now_seg)
|
if (S_GET_SEGMENT (label) != now_seg)
|
return;
|
return;
|
if (!(bfd_get_section_flags (stdoutput, now_seg) & SEC_CODE))
|
if (!(bfd_get_section_flags (stdoutput, now_seg) & SEC_CODE))
|
return;
|
return;
|
if (files_in_use == 0 && debug_type != DEBUG_DWARF2)
|
if (files_in_use == 0 && debug_type != DEBUG_DWARF2)
|
return;
|
return;
|
|
|
dwarf2_where (&loc);
|
dwarf2_where (&loc);
|
|
|
loc.flags |= DWARF2_FLAG_BASIC_BLOCK;
|
loc.flags |= DWARF2_FLAG_BASIC_BLOCK;
|
|
|
dwarf2_gen_line_info_1 (label, &loc);
|
dwarf2_gen_line_info_1 (label, &loc);
|
dwarf2_consume_line_info ();
|
dwarf2_consume_line_info ();
|
}
|
}
|
|
|
/* Get a .debug_line file number for FILENAME. If NUM is nonzero,
|
/* Get a .debug_line file number for FILENAME. If NUM is nonzero,
|
allocate it on that file table slot, otherwise return the first
|
allocate it on that file table slot, otherwise return the first
|
empty one. */
|
empty one. */
|
|
|
static unsigned int
|
static unsigned int
|
get_filenum (const char *filename, unsigned int num)
|
get_filenum (const char *filename, unsigned int num)
|
{
|
{
|
static unsigned int last_used, last_used_dir_len;
|
static unsigned int last_used, last_used_dir_len;
|
const char *file;
|
const char *file;
|
size_t dir_len;
|
size_t dir_len;
|
unsigned int i, dir;
|
unsigned int i, dir;
|
|
|
if (num == 0 && last_used)
|
if (num == 0 && last_used)
|
{
|
{
|
if (! files[last_used].dir
|
if (! files[last_used].dir
|
&& filename_cmp (filename, files[last_used].filename) == 0)
|
&& filename_cmp (filename, files[last_used].filename) == 0)
|
return last_used;
|
return last_used;
|
if (files[last_used].dir
|
if (files[last_used].dir
|
&& filename_ncmp (filename, dirs[files[last_used].dir],
|
&& filename_ncmp (filename, dirs[files[last_used].dir],
|
last_used_dir_len) == 0
|
last_used_dir_len) == 0
|
&& IS_DIR_SEPARATOR (filename [last_used_dir_len])
|
&& IS_DIR_SEPARATOR (filename [last_used_dir_len])
|
&& filename_cmp (filename + last_used_dir_len + 1,
|
&& filename_cmp (filename + last_used_dir_len + 1,
|
files[last_used].filename) == 0)
|
files[last_used].filename) == 0)
|
return last_used;
|
return last_used;
|
}
|
}
|
|
|
file = lbasename (filename);
|
file = lbasename (filename);
|
/* Don't make empty string from / or A: from A:/ . */
|
/* Don't make empty string from / or A: from A:/ . */
|
#ifdef HAVE_DOS_BASED_FILE_SYSTEM
|
#ifdef HAVE_DOS_BASED_FILE_SYSTEM
|
if (file <= filename + 3)
|
if (file <= filename + 3)
|
file = filename;
|
file = filename;
|
#else
|
#else
|
if (file == filename + 1)
|
if (file == filename + 1)
|
file = filename;
|
file = filename;
|
#endif
|
#endif
|
dir_len = file - filename;
|
dir_len = file - filename;
|
|
|
dir = 0;
|
dir = 0;
|
if (dir_len)
|
if (dir_len)
|
{
|
{
|
#ifndef DWARF2_DIR_SHOULD_END_WITH_SEPARATOR
|
#ifndef DWARF2_DIR_SHOULD_END_WITH_SEPARATOR
|
--dir_len;
|
--dir_len;
|
#endif
|
#endif
|
for (dir = 1; dir < dirs_in_use; ++dir)
|
for (dir = 1; dir < dirs_in_use; ++dir)
|
if (filename_ncmp (filename, dirs[dir], dir_len) == 0
|
if (filename_ncmp (filename, dirs[dir], dir_len) == 0
|
&& dirs[dir][dir_len] == '\0')
|
&& dirs[dir][dir_len] == '\0')
|
break;
|
break;
|
|
|
if (dir >= dirs_in_use)
|
if (dir >= dirs_in_use)
|
{
|
{
|
if (dir >= dirs_allocated)
|
if (dir >= dirs_allocated)
|
{
|
{
|
dirs_allocated = dir + 32;
|
dirs_allocated = dir + 32;
|
dirs = (char **)
|
dirs = (char **)
|
xrealloc (dirs, (dir + 32) * sizeof (const char *));
|
xrealloc (dirs, (dir + 32) * sizeof (const char *));
|
}
|
}
|
|
|
dirs[dir] = (char *) xmalloc (dir_len + 1);
|
dirs[dir] = (char *) xmalloc (dir_len + 1);
|
memcpy (dirs[dir], filename, dir_len);
|
memcpy (dirs[dir], filename, dir_len);
|
dirs[dir][dir_len] = '\0';
|
dirs[dir][dir_len] = '\0';
|
dirs_in_use = dir + 1;
|
dirs_in_use = dir + 1;
|
}
|
}
|
}
|
}
|
|
|
if (num == 0)
|
if (num == 0)
|
{
|
{
|
for (i = 1; i < files_in_use; ++i)
|
for (i = 1; i < files_in_use; ++i)
|
if (files[i].dir == dir
|
if (files[i].dir == dir
|
&& files[i].filename
|
&& files[i].filename
|
&& filename_cmp (file, files[i].filename) == 0)
|
&& filename_cmp (file, files[i].filename) == 0)
|
{
|
{
|
last_used = i;
|
last_used = i;
|
last_used_dir_len = dir_len;
|
last_used_dir_len = dir_len;
|
return i;
|
return i;
|
}
|
}
|
}
|
}
|
else
|
else
|
i = num;
|
i = num;
|
|
|
if (i >= files_allocated)
|
if (i >= files_allocated)
|
{
|
{
|
unsigned int old = files_allocated;
|
unsigned int old = files_allocated;
|
|
|
files_allocated = i + 32;
|
files_allocated = i + 32;
|
files = (struct file_entry *)
|
files = (struct file_entry *)
|
xrealloc (files, (i + 32) * sizeof (struct file_entry));
|
xrealloc (files, (i + 32) * sizeof (struct file_entry));
|
|
|
memset (files + old, 0, (i + 32 - old) * sizeof (struct file_entry));
|
memset (files + old, 0, (i + 32 - old) * sizeof (struct file_entry));
|
}
|
}
|
|
|
files[i].filename = num ? file : xstrdup (file);
|
files[i].filename = num ? file : xstrdup (file);
|
files[i].dir = dir;
|
files[i].dir = dir;
|
if (files_in_use < i + 1)
|
if (files_in_use < i + 1)
|
files_in_use = i + 1;
|
files_in_use = i + 1;
|
last_used = i;
|
last_used = i;
|
last_used_dir_len = dir_len;
|
last_used_dir_len = dir_len;
|
|
|
return i;
|
return i;
|
}
|
}
|
|
|
/* Handle two forms of .file directive:
|
/* Handle two forms of .file directive:
|
- Pass .file "source.c" to s_app_file
|
- Pass .file "source.c" to s_app_file
|
- Handle .file 1 "source.c" by adding an entry to the DWARF-2 file table
|
- Handle .file 1 "source.c" by adding an entry to the DWARF-2 file table
|
|
|
If an entry is added to the file table, return a pointer to the filename. */
|
If an entry is added to the file table, return a pointer to the filename. */
|
|
|
char *
|
char *
|
dwarf2_directive_file (int dummy ATTRIBUTE_UNUSED)
|
dwarf2_directive_file (int dummy ATTRIBUTE_UNUSED)
|
{
|
{
|
offsetT num;
|
offsetT num;
|
char *filename;
|
char *filename;
|
int filename_len;
|
int filename_len;
|
|
|
/* Continue to accept a bare string and pass it off. */
|
/* Continue to accept a bare string and pass it off. */
|
SKIP_WHITESPACE ();
|
SKIP_WHITESPACE ();
|
if (*input_line_pointer == '"')
|
if (*input_line_pointer == '"')
|
{
|
{
|
s_app_file (0);
|
s_app_file (0);
|
return NULL;
|
return NULL;
|
}
|
}
|
|
|
num = get_absolute_expression ();
|
num = get_absolute_expression ();
|
filename = demand_copy_C_string (&filename_len);
|
filename = demand_copy_C_string (&filename_len);
|
if (filename == NULL)
|
if (filename == NULL)
|
return NULL;
|
return NULL;
|
demand_empty_rest_of_line ();
|
demand_empty_rest_of_line ();
|
|
|
if (num < 1)
|
if (num < 1)
|
{
|
{
|
as_bad (_("file number less than one"));
|
as_bad (_("file number less than one"));
|
return NULL;
|
return NULL;
|
}
|
}
|
|
|
/* A .file directive implies compiler generated debug information is
|
/* A .file directive implies compiler generated debug information is
|
being supplied. Turn off gas generated debug info. */
|
being supplied. Turn off gas generated debug info. */
|
debug_type = DEBUG_NONE;
|
debug_type = DEBUG_NONE;
|
|
|
if (num < (int) files_in_use && files[num].filename != 0)
|
if (num < (int) files_in_use && files[num].filename != 0)
|
{
|
{
|
as_bad (_("file number %ld already allocated"), (long) num);
|
as_bad (_("file number %ld already allocated"), (long) num);
|
return NULL;
|
return NULL;
|
}
|
}
|
|
|
get_filenum (filename, num);
|
get_filenum (filename, num);
|
|
|
return filename;
|
return filename;
|
}
|
}
|
|
|
void
|
void
|
dwarf2_directive_loc (int dummy ATTRIBUTE_UNUSED)
|
dwarf2_directive_loc (int dummy ATTRIBUTE_UNUSED)
|
{
|
{
|
offsetT filenum, line;
|
offsetT filenum, line;
|
|
|
/* If we see two .loc directives in a row, force the first one to be
|
/* If we see two .loc directives in a row, force the first one to be
|
output now. */
|
output now. */
|
if (dwarf2_loc_directive_seen)
|
if (dwarf2_loc_directive_seen)
|
dwarf2_emit_insn (0);
|
dwarf2_emit_insn (0);
|
|
|
filenum = get_absolute_expression ();
|
filenum = get_absolute_expression ();
|
SKIP_WHITESPACE ();
|
SKIP_WHITESPACE ();
|
line = get_absolute_expression ();
|
line = get_absolute_expression ();
|
|
|
if (filenum < 1)
|
if (filenum < 1)
|
{
|
{
|
as_bad (_("file number less than one"));
|
as_bad (_("file number less than one"));
|
return;
|
return;
|
}
|
}
|
if (filenum >= (int) files_in_use || files[filenum].filename == 0)
|
if (filenum >= (int) files_in_use || files[filenum].filename == 0)
|
{
|
{
|
as_bad (_("unassigned file number %ld"), (long) filenum);
|
as_bad (_("unassigned file number %ld"), (long) filenum);
|
return;
|
return;
|
}
|
}
|
|
|
current.filenum = filenum;
|
current.filenum = filenum;
|
current.line = line;
|
current.line = line;
|
current.discriminator = 0;
|
current.discriminator = 0;
|
|
|
#ifndef NO_LISTING
|
#ifndef NO_LISTING
|
if (listing)
|
if (listing)
|
{
|
{
|
if (files[filenum].dir)
|
if (files[filenum].dir)
|
{
|
{
|
size_t dir_len = strlen (dirs[files[filenum].dir]);
|
size_t dir_len = strlen (dirs[files[filenum].dir]);
|
size_t file_len = strlen (files[filenum].filename);
|
size_t file_len = strlen (files[filenum].filename);
|
char *cp = (char *) alloca (dir_len + 1 + file_len + 1);
|
char *cp = (char *) alloca (dir_len + 1 + file_len + 1);
|
|
|
memcpy (cp, dirs[files[filenum].dir], dir_len);
|
memcpy (cp, dirs[files[filenum].dir], dir_len);
|
INSERT_DIR_SEPARATOR (cp, dir_len);
|
INSERT_DIR_SEPARATOR (cp, dir_len);
|
memcpy (cp + dir_len + 1, files[filenum].filename, file_len);
|
memcpy (cp + dir_len + 1, files[filenum].filename, file_len);
|
cp[dir_len + file_len + 1] = '\0';
|
cp[dir_len + file_len + 1] = '\0';
|
listing_source_file (cp);
|
listing_source_file (cp);
|
}
|
}
|
else
|
else
|
listing_source_file (files[filenum].filename);
|
listing_source_file (files[filenum].filename);
|
listing_source_line (line);
|
listing_source_line (line);
|
}
|
}
|
#endif
|
#endif
|
|
|
SKIP_WHITESPACE ();
|
SKIP_WHITESPACE ();
|
if (ISDIGIT (*input_line_pointer))
|
if (ISDIGIT (*input_line_pointer))
|
{
|
{
|
current.column = get_absolute_expression ();
|
current.column = get_absolute_expression ();
|
SKIP_WHITESPACE ();
|
SKIP_WHITESPACE ();
|
}
|
}
|
|
|
while (ISALPHA (*input_line_pointer))
|
while (ISALPHA (*input_line_pointer))
|
{
|
{
|
char *p, c;
|
char *p, c;
|
offsetT value;
|
offsetT value;
|
|
|
p = input_line_pointer;
|
p = input_line_pointer;
|
c = get_symbol_end ();
|
c = get_symbol_end ();
|
|
|
if (strcmp (p, "basic_block") == 0)
|
if (strcmp (p, "basic_block") == 0)
|
{
|
{
|
current.flags |= DWARF2_FLAG_BASIC_BLOCK;
|
current.flags |= DWARF2_FLAG_BASIC_BLOCK;
|
*input_line_pointer = c;
|
*input_line_pointer = c;
|
}
|
}
|
else if (strcmp (p, "prologue_end") == 0)
|
else if (strcmp (p, "prologue_end") == 0)
|
{
|
{
|
current.flags |= DWARF2_FLAG_PROLOGUE_END;
|
current.flags |= DWARF2_FLAG_PROLOGUE_END;
|
*input_line_pointer = c;
|
*input_line_pointer = c;
|
}
|
}
|
else if (strcmp (p, "epilogue_begin") == 0)
|
else if (strcmp (p, "epilogue_begin") == 0)
|
{
|
{
|
current.flags |= DWARF2_FLAG_EPILOGUE_BEGIN;
|
current.flags |= DWARF2_FLAG_EPILOGUE_BEGIN;
|
*input_line_pointer = c;
|
*input_line_pointer = c;
|
}
|
}
|
else if (strcmp (p, "is_stmt") == 0)
|
else if (strcmp (p, "is_stmt") == 0)
|
{
|
{
|
*input_line_pointer = c;
|
*input_line_pointer = c;
|
value = get_absolute_expression ();
|
value = get_absolute_expression ();
|
if (value == 0)
|
if (value == 0)
|
current.flags &= ~DWARF2_FLAG_IS_STMT;
|
current.flags &= ~DWARF2_FLAG_IS_STMT;
|
else if (value == 1)
|
else if (value == 1)
|
current.flags |= DWARF2_FLAG_IS_STMT;
|
current.flags |= DWARF2_FLAG_IS_STMT;
|
else
|
else
|
{
|
{
|
as_bad (_("is_stmt value not 0 or 1"));
|
as_bad (_("is_stmt value not 0 or 1"));
|
return;
|
return;
|
}
|
}
|
}
|
}
|
else if (strcmp (p, "isa") == 0)
|
else if (strcmp (p, "isa") == 0)
|
{
|
{
|
*input_line_pointer = c;
|
*input_line_pointer = c;
|
value = get_absolute_expression ();
|
value = get_absolute_expression ();
|
if (value >= 0)
|
if (value >= 0)
|
current.isa = value;
|
current.isa = value;
|
else
|
else
|
{
|
{
|
as_bad (_("isa number less than zero"));
|
as_bad (_("isa number less than zero"));
|
return;
|
return;
|
}
|
}
|
}
|
}
|
else if (strcmp (p, "discriminator") == 0)
|
else if (strcmp (p, "discriminator") == 0)
|
{
|
{
|
*input_line_pointer = c;
|
*input_line_pointer = c;
|
value = get_absolute_expression ();
|
value = get_absolute_expression ();
|
if (value >= 0)
|
if (value >= 0)
|
current.discriminator = value;
|
current.discriminator = value;
|
else
|
else
|
{
|
{
|
as_bad (_("discriminator less than zero"));
|
as_bad (_("discriminator less than zero"));
|
return;
|
return;
|
}
|
}
|
}
|
}
|
else
|
else
|
{
|
{
|
as_bad (_("unknown .loc sub-directive `%s'"), p);
|
as_bad (_("unknown .loc sub-directive `%s'"), p);
|
*input_line_pointer = c;
|
*input_line_pointer = c;
|
return;
|
return;
|
}
|
}
|
|
|
SKIP_WHITESPACE ();
|
SKIP_WHITESPACE ();
|
}
|
}
|
|
|
demand_empty_rest_of_line ();
|
demand_empty_rest_of_line ();
|
dwarf2_loc_directive_seen = TRUE;
|
dwarf2_loc_directive_seen = TRUE;
|
debug_type = DEBUG_NONE;
|
debug_type = DEBUG_NONE;
|
}
|
}
|
|
|
void
|
void
|
dwarf2_directive_loc_mark_labels (int dummy ATTRIBUTE_UNUSED)
|
dwarf2_directive_loc_mark_labels (int dummy ATTRIBUTE_UNUSED)
|
{
|
{
|
offsetT value = get_absolute_expression ();
|
offsetT value = get_absolute_expression ();
|
|
|
if (value != 0 && value != 1)
|
if (value != 0 && value != 1)
|
{
|
{
|
as_bad (_("expected 0 or 1"));
|
as_bad (_("expected 0 or 1"));
|
ignore_rest_of_line ();
|
ignore_rest_of_line ();
|
}
|
}
|
else
|
else
|
{
|
{
|
dwarf2_loc_mark_labels = value != 0;
|
dwarf2_loc_mark_labels = value != 0;
|
demand_empty_rest_of_line ();
|
demand_empty_rest_of_line ();
|
}
|
}
|
}
|
}
|
|
|
static struct frag *
|
static struct frag *
|
first_frag_for_seg (segT seg)
|
first_frag_for_seg (segT seg)
|
{
|
{
|
return seg_info (seg)->frchainP->frch_root;
|
return seg_info (seg)->frchainP->frch_root;
|
}
|
}
|
|
|
static struct frag *
|
static struct frag *
|
last_frag_for_seg (segT seg)
|
last_frag_for_seg (segT seg)
|
{
|
{
|
frchainS *f = seg_info (seg)->frchainP;
|
frchainS *f = seg_info (seg)->frchainP;
|
|
|
while (f->frch_next != NULL)
|
while (f->frch_next != NULL)
|
f = f->frch_next;
|
f = f->frch_next;
|
|
|
return f->frch_last;
|
return f->frch_last;
|
}
|
}
|
|
|
/* Emit a single byte into the current segment. */
|
/* Emit a single byte into the current segment. */
|
|
|
static inline void
|
static inline void
|
out_byte (int byte)
|
out_byte (int byte)
|
{
|
{
|
FRAG_APPEND_1_CHAR (byte);
|
FRAG_APPEND_1_CHAR (byte);
|
}
|
}
|
|
|
/* Emit a statement program opcode into the current segment. */
|
/* Emit a statement program opcode into the current segment. */
|
|
|
static inline void
|
static inline void
|
out_opcode (int opc)
|
out_opcode (int opc)
|
{
|
{
|
out_byte (opc);
|
out_byte (opc);
|
}
|
}
|
|
|
/* Emit a two-byte word into the current segment. */
|
/* Emit a two-byte word into the current segment. */
|
|
|
static inline void
|
static inline void
|
out_two (int data)
|
out_two (int data)
|
{
|
{
|
md_number_to_chars (frag_more (2), data, 2);
|
md_number_to_chars (frag_more (2), data, 2);
|
}
|
}
|
|
|
/* Emit a four byte word into the current segment. */
|
/* Emit a four byte word into the current segment. */
|
|
|
static inline void
|
static inline void
|
out_four (int data)
|
out_four (int data)
|
{
|
{
|
md_number_to_chars (frag_more (4), data, 4);
|
md_number_to_chars (frag_more (4), data, 4);
|
}
|
}
|
|
|
/* Emit an unsigned "little-endian base 128" number. */
|
/* Emit an unsigned "little-endian base 128" number. */
|
|
|
static void
|
static void
|
out_uleb128 (addressT value)
|
out_uleb128 (addressT value)
|
{
|
{
|
output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0);
|
output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0);
|
}
|
}
|
|
|
/* Emit a signed "little-endian base 128" number. */
|
/* Emit a signed "little-endian base 128" number. */
|
|
|
static void
|
static void
|
out_leb128 (addressT value)
|
out_leb128 (addressT value)
|
{
|
{
|
output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1);
|
output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1);
|
}
|
}
|
|
|
/* Emit a tuple for .debug_abbrev. */
|
/* Emit a tuple for .debug_abbrev. */
|
|
|
static inline void
|
static inline void
|
out_abbrev (int name, int form)
|
out_abbrev (int name, int form)
|
{
|
{
|
out_uleb128 (name);
|
out_uleb128 (name);
|
out_uleb128 (form);
|
out_uleb128 (form);
|
}
|
}
|
|
|
/* Get the size of a fragment. */
|
/* Get the size of a fragment. */
|
|
|
static offsetT
|
static offsetT
|
get_frag_fix (fragS *frag, segT seg)
|
get_frag_fix (fragS *frag, segT seg)
|
{
|
{
|
frchainS *fr;
|
frchainS *fr;
|
|
|
if (frag->fr_next)
|
if (frag->fr_next)
|
return frag->fr_fix;
|
return frag->fr_fix;
|
|
|
/* If a fragment is the last in the chain, special measures must be
|
/* If a fragment is the last in the chain, special measures must be
|
taken to find its size before relaxation, since it may be pending
|
taken to find its size before relaxation, since it may be pending
|
on some subsegment chain. */
|
on some subsegment chain. */
|
for (fr = seg_info (seg)->frchainP; fr; fr = fr->frch_next)
|
for (fr = seg_info (seg)->frchainP; fr; fr = fr->frch_next)
|
if (fr->frch_last == frag)
|
if (fr->frch_last == frag)
|
return (char *) obstack_next_free (&fr->frch_obstack) - frag->fr_literal;
|
return (char *) obstack_next_free (&fr->frch_obstack) - frag->fr_literal;
|
|
|
abort ();
|
abort ();
|
}
|
}
|
|
|
/* Set an absolute address (may result in a relocation entry). */
|
/* Set an absolute address (may result in a relocation entry). */
|
|
|
static void
|
static void
|
out_set_addr (symbolS *sym)
|
out_set_addr (symbolS *sym)
|
{
|
{
|
expressionS exp;
|
expressionS exp;
|
|
|
out_opcode (DW_LNS_extended_op);
|
out_opcode (DW_LNS_extended_op);
|
out_uleb128 (sizeof_address + 1);
|
out_uleb128 (sizeof_address + 1);
|
|
|
out_opcode (DW_LNE_set_address);
|
out_opcode (DW_LNE_set_address);
|
exp.X_op = O_symbol;
|
exp.X_op = O_symbol;
|
exp.X_add_symbol = sym;
|
exp.X_add_symbol = sym;
|
exp.X_add_number = 0;
|
exp.X_add_number = 0;
|
emit_expr (&exp, sizeof_address);
|
emit_expr (&exp, sizeof_address);
|
}
|
}
|
|
|
#if DWARF2_LINE_MIN_INSN_LENGTH > 1
|
#if DWARF2_LINE_MIN_INSN_LENGTH > 1
|
static void scale_addr_delta (addressT *);
|
static void scale_addr_delta (addressT *);
|
|
|
static void
|
static void
|
scale_addr_delta (addressT *addr_delta)
|
scale_addr_delta (addressT *addr_delta)
|
{
|
{
|
static int printed_this = 0;
|
static int printed_this = 0;
|
if (*addr_delta % DWARF2_LINE_MIN_INSN_LENGTH != 0)
|
if (*addr_delta % DWARF2_LINE_MIN_INSN_LENGTH != 0)
|
{
|
{
|
if (!printed_this)
|
if (!printed_this)
|
as_bad("unaligned opcodes detected in executable segment");
|
as_bad("unaligned opcodes detected in executable segment");
|
printed_this = 1;
|
printed_this = 1;
|
}
|
}
|
*addr_delta /= DWARF2_LINE_MIN_INSN_LENGTH;
|
*addr_delta /= DWARF2_LINE_MIN_INSN_LENGTH;
|
}
|
}
|
#else
|
#else
|
#define scale_addr_delta(A)
|
#define scale_addr_delta(A)
|
#endif
|
#endif
|
|
|
/* Encode a pair of line and address skips as efficiently as possible.
|
/* Encode a pair of line and address skips as efficiently as possible.
|
Note that the line skip is signed, whereas the address skip is unsigned.
|
Note that the line skip is signed, whereas the address skip is unsigned.
|
|
|
The following two routines *must* be kept in sync. This is
|
The following two routines *must* be kept in sync. This is
|
enforced by making emit_inc_line_addr abort if we do not emit
|
enforced by making emit_inc_line_addr abort if we do not emit
|
exactly the expected number of bytes. */
|
exactly the expected number of bytes. */
|
|
|
static int
|
static int
|
size_inc_line_addr (int line_delta, addressT addr_delta)
|
size_inc_line_addr (int line_delta, addressT addr_delta)
|
{
|
{
|
unsigned int tmp, opcode;
|
unsigned int tmp, opcode;
|
int len = 0;
|
int len = 0;
|
|
|
/* Scale the address delta by the minimum instruction length. */
|
/* Scale the address delta by the minimum instruction length. */
|
scale_addr_delta (&addr_delta);
|
scale_addr_delta (&addr_delta);
|
|
|
/* INT_MAX is a signal that this is actually a DW_LNE_end_sequence.
|
/* INT_MAX is a signal that this is actually a DW_LNE_end_sequence.
|
We cannot use special opcodes here, since we want the end_sequence
|
We cannot use special opcodes here, since we want the end_sequence
|
to emit the matrix entry. */
|
to emit the matrix entry. */
|
if (line_delta == INT_MAX)
|
if (line_delta == INT_MAX)
|
{
|
{
|
if (addr_delta == MAX_SPECIAL_ADDR_DELTA)
|
if (addr_delta == MAX_SPECIAL_ADDR_DELTA)
|
len = 1;
|
len = 1;
|
else
|
else
|
len = 1 + sizeof_leb128 (addr_delta, 0);
|
len = 1 + sizeof_leb128 (addr_delta, 0);
|
return len + 3;
|
return len + 3;
|
}
|
}
|
|
|
/* Bias the line delta by the base. */
|
/* Bias the line delta by the base. */
|
tmp = line_delta - DWARF2_LINE_BASE;
|
tmp = line_delta - DWARF2_LINE_BASE;
|
|
|
/* If the line increment is out of range of a special opcode, we
|
/* If the line increment is out of range of a special opcode, we
|
must encode it with DW_LNS_advance_line. */
|
must encode it with DW_LNS_advance_line. */
|
if (tmp >= DWARF2_LINE_RANGE)
|
if (tmp >= DWARF2_LINE_RANGE)
|
{
|
{
|
len = 1 + sizeof_leb128 (line_delta, 1);
|
len = 1 + sizeof_leb128 (line_delta, 1);
|
line_delta = 0;
|
line_delta = 0;
|
tmp = 0 - DWARF2_LINE_BASE;
|
tmp = 0 - DWARF2_LINE_BASE;
|
}
|
}
|
|
|
/* Bias the opcode by the special opcode base. */
|
/* Bias the opcode by the special opcode base. */
|
tmp += DWARF2_LINE_OPCODE_BASE;
|
tmp += DWARF2_LINE_OPCODE_BASE;
|
|
|
/* Avoid overflow when addr_delta is large. */
|
/* Avoid overflow when addr_delta is large. */
|
if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA)
|
if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA)
|
{
|
{
|
/* Try using a special opcode. */
|
/* Try using a special opcode. */
|
opcode = tmp + addr_delta * DWARF2_LINE_RANGE;
|
opcode = tmp + addr_delta * DWARF2_LINE_RANGE;
|
if (opcode <= 255)
|
if (opcode <= 255)
|
return len + 1;
|
return len + 1;
|
|
|
/* Try using DW_LNS_const_add_pc followed by special op. */
|
/* Try using DW_LNS_const_add_pc followed by special op. */
|
opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE;
|
opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE;
|
if (opcode <= 255)
|
if (opcode <= 255)
|
return len + 2;
|
return len + 2;
|
}
|
}
|
|
|
/* Otherwise use DW_LNS_advance_pc. */
|
/* Otherwise use DW_LNS_advance_pc. */
|
len += 1 + sizeof_leb128 (addr_delta, 0);
|
len += 1 + sizeof_leb128 (addr_delta, 0);
|
|
|
/* DW_LNS_copy or special opcode. */
|
/* DW_LNS_copy or special opcode. */
|
len += 1;
|
len += 1;
|
|
|
return len;
|
return len;
|
}
|
}
|
|
|
static void
|
static void
|
emit_inc_line_addr (int line_delta, addressT addr_delta, char *p, int len)
|
emit_inc_line_addr (int line_delta, addressT addr_delta, char *p, int len)
|
{
|
{
|
unsigned int tmp, opcode;
|
unsigned int tmp, opcode;
|
int need_copy = 0;
|
int need_copy = 0;
|
char *end = p + len;
|
char *end = p + len;
|
|
|
/* Line number sequences cannot go backward in addresses. This means
|
/* Line number sequences cannot go backward in addresses. This means
|
we've incorrectly ordered the statements in the sequence. */
|
we've incorrectly ordered the statements in the sequence. */
|
gas_assert ((offsetT) addr_delta >= 0);
|
gas_assert ((offsetT) addr_delta >= 0);
|
|
|
/* Scale the address delta by the minimum instruction length. */
|
/* Scale the address delta by the minimum instruction length. */
|
scale_addr_delta (&addr_delta);
|
scale_addr_delta (&addr_delta);
|
|
|
/* INT_MAX is a signal that this is actually a DW_LNE_end_sequence.
|
/* INT_MAX is a signal that this is actually a DW_LNE_end_sequence.
|
We cannot use special opcodes here, since we want the end_sequence
|
We cannot use special opcodes here, since we want the end_sequence
|
to emit the matrix entry. */
|
to emit the matrix entry. */
|
if (line_delta == INT_MAX)
|
if (line_delta == INT_MAX)
|
{
|
{
|
if (addr_delta == MAX_SPECIAL_ADDR_DELTA)
|
if (addr_delta == MAX_SPECIAL_ADDR_DELTA)
|
*p++ = DW_LNS_const_add_pc;
|
*p++ = DW_LNS_const_add_pc;
|
else
|
else
|
{
|
{
|
*p++ = DW_LNS_advance_pc;
|
*p++ = DW_LNS_advance_pc;
|
p += output_leb128 (p, addr_delta, 0);
|
p += output_leb128 (p, addr_delta, 0);
|
}
|
}
|
|
|
*p++ = DW_LNS_extended_op;
|
*p++ = DW_LNS_extended_op;
|
*p++ = 1;
|
*p++ = 1;
|
*p++ = DW_LNE_end_sequence;
|
*p++ = DW_LNE_end_sequence;
|
goto done;
|
goto done;
|
}
|
}
|
|
|
/* Bias the line delta by the base. */
|
/* Bias the line delta by the base. */
|
tmp = line_delta - DWARF2_LINE_BASE;
|
tmp = line_delta - DWARF2_LINE_BASE;
|
|
|
/* If the line increment is out of range of a special opcode, we
|
/* If the line increment is out of range of a special opcode, we
|
must encode it with DW_LNS_advance_line. */
|
must encode it with DW_LNS_advance_line. */
|
if (tmp >= DWARF2_LINE_RANGE)
|
if (tmp >= DWARF2_LINE_RANGE)
|
{
|
{
|
*p++ = DW_LNS_advance_line;
|
*p++ = DW_LNS_advance_line;
|
p += output_leb128 (p, line_delta, 1);
|
p += output_leb128 (p, line_delta, 1);
|
|
|
line_delta = 0;
|
line_delta = 0;
|
tmp = 0 - DWARF2_LINE_BASE;
|
tmp = 0 - DWARF2_LINE_BASE;
|
need_copy = 1;
|
need_copy = 1;
|
}
|
}
|
|
|
/* Prettier, I think, to use DW_LNS_copy instead of a "line +0, addr +0"
|
/* Prettier, I think, to use DW_LNS_copy instead of a "line +0, addr +0"
|
special opcode. */
|
special opcode. */
|
if (line_delta == 0 && addr_delta == 0)
|
if (line_delta == 0 && addr_delta == 0)
|
{
|
{
|
*p++ = DW_LNS_copy;
|
*p++ = DW_LNS_copy;
|
goto done;
|
goto done;
|
}
|
}
|
|
|
/* Bias the opcode by the special opcode base. */
|
/* Bias the opcode by the special opcode base. */
|
tmp += DWARF2_LINE_OPCODE_BASE;
|
tmp += DWARF2_LINE_OPCODE_BASE;
|
|
|
/* Avoid overflow when addr_delta is large. */
|
/* Avoid overflow when addr_delta is large. */
|
if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA)
|
if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA)
|
{
|
{
|
/* Try using a special opcode. */
|
/* Try using a special opcode. */
|
opcode = tmp + addr_delta * DWARF2_LINE_RANGE;
|
opcode = tmp + addr_delta * DWARF2_LINE_RANGE;
|
if (opcode <= 255)
|
if (opcode <= 255)
|
{
|
{
|
*p++ = opcode;
|
*p++ = opcode;
|
goto done;
|
goto done;
|
}
|
}
|
|
|
/* Try using DW_LNS_const_add_pc followed by special op. */
|
/* Try using DW_LNS_const_add_pc followed by special op. */
|
opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE;
|
opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE;
|
if (opcode <= 255)
|
if (opcode <= 255)
|
{
|
{
|
*p++ = DW_LNS_const_add_pc;
|
*p++ = DW_LNS_const_add_pc;
|
*p++ = opcode;
|
*p++ = opcode;
|
goto done;
|
goto done;
|
}
|
}
|
}
|
}
|
|
|
/* Otherwise use DW_LNS_advance_pc. */
|
/* Otherwise use DW_LNS_advance_pc. */
|
*p++ = DW_LNS_advance_pc;
|
*p++ = DW_LNS_advance_pc;
|
p += output_leb128 (p, addr_delta, 0);
|
p += output_leb128 (p, addr_delta, 0);
|
|
|
if (need_copy)
|
if (need_copy)
|
*p++ = DW_LNS_copy;
|
*p++ = DW_LNS_copy;
|
else
|
else
|
*p++ = tmp;
|
*p++ = tmp;
|
|
|
done:
|
done:
|
gas_assert (p == end);
|
gas_assert (p == end);
|
}
|
}
|
|
|
/* Handy routine to combine calls to the above two routines. */
|
/* Handy routine to combine calls to the above two routines. */
|
|
|
static void
|
static void
|
out_inc_line_addr (int line_delta, addressT addr_delta)
|
out_inc_line_addr (int line_delta, addressT addr_delta)
|
{
|
{
|
int len = size_inc_line_addr (line_delta, addr_delta);
|
int len = size_inc_line_addr (line_delta, addr_delta);
|
emit_inc_line_addr (line_delta, addr_delta, frag_more (len), len);
|
emit_inc_line_addr (line_delta, addr_delta, frag_more (len), len);
|
}
|
}
|
|
|
/* Write out an alternative form of line and address skips using
|
/* Write out an alternative form of line and address skips using
|
DW_LNS_fixed_advance_pc opcodes. This uses more space than the default
|
DW_LNS_fixed_advance_pc opcodes. This uses more space than the default
|
line and address information, but it is required if linker relaxation
|
line and address information, but it is required if linker relaxation
|
could change the code offsets. The following two routines *must* be
|
could change the code offsets. The following two routines *must* be
|
kept in sync. */
|
kept in sync. */
|
|
|
static int
|
static int
|
size_fixed_inc_line_addr (int line_delta, addressT addr_delta)
|
size_fixed_inc_line_addr (int line_delta, addressT addr_delta)
|
{
|
{
|
int len = 0;
|
int len = 0;
|
|
|
/* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */
|
/* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */
|
if (line_delta != INT_MAX)
|
if (line_delta != INT_MAX)
|
len = 1 + sizeof_leb128 (line_delta, 1);
|
len = 1 + sizeof_leb128 (line_delta, 1);
|
|
|
if (addr_delta > 50000)
|
if (addr_delta > 50000)
|
{
|
{
|
/* DW_LNS_extended_op */
|
/* DW_LNS_extended_op */
|
len += 1 + sizeof_leb128 (sizeof_address + 1, 0);
|
len += 1 + sizeof_leb128 (sizeof_address + 1, 0);
|
/* DW_LNE_set_address */
|
/* DW_LNE_set_address */
|
len += 1 + sizeof_address;
|
len += 1 + sizeof_address;
|
}
|
}
|
else
|
else
|
/* DW_LNS_fixed_advance_pc */
|
/* DW_LNS_fixed_advance_pc */
|
len += 3;
|
len += 3;
|
|
|
if (line_delta == INT_MAX)
|
if (line_delta == INT_MAX)
|
/* DW_LNS_extended_op + DW_LNE_end_sequence */
|
/* DW_LNS_extended_op + DW_LNE_end_sequence */
|
len += 3;
|
len += 3;
|
else
|
else
|
/* DW_LNS_copy */
|
/* DW_LNS_copy */
|
len += 1;
|
len += 1;
|
|
|
return len;
|
return len;
|
}
|
}
|
|
|
static void
|
static void
|
emit_fixed_inc_line_addr (int line_delta, addressT addr_delta, fragS *frag,
|
emit_fixed_inc_line_addr (int line_delta, addressT addr_delta, fragS *frag,
|
char *p, int len)
|
char *p, int len)
|
{
|
{
|
expressionS *pexp;
|
expressionS *pexp;
|
segT line_seg;
|
segT line_seg;
|
char *end = p + len;
|
char *end = p + len;
|
|
|
/* Line number sequences cannot go backward in addresses. This means
|
/* Line number sequences cannot go backward in addresses. This means
|
we've incorrectly ordered the statements in the sequence. */
|
we've incorrectly ordered the statements in the sequence. */
|
gas_assert ((offsetT) addr_delta >= 0);
|
gas_assert ((offsetT) addr_delta >= 0);
|
|
|
/* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */
|
/* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */
|
if (line_delta != INT_MAX)
|
if (line_delta != INT_MAX)
|
{
|
{
|
*p++ = DW_LNS_advance_line;
|
*p++ = DW_LNS_advance_line;
|
p += output_leb128 (p, line_delta, 1);
|
p += output_leb128 (p, line_delta, 1);
|
}
|
}
|
|
|
pexp = symbol_get_value_expression (frag->fr_symbol);
|
pexp = symbol_get_value_expression (frag->fr_symbol);
|
line_seg = subseg_get (".debug_line", 0);
|
line_seg = subseg_get (".debug_line", 0);
|
|
|
/* The DW_LNS_fixed_advance_pc opcode has a 2-byte operand so it can
|
/* The DW_LNS_fixed_advance_pc opcode has a 2-byte operand so it can
|
advance the address by at most 64K. Linker relaxation (without
|
advance the address by at most 64K. Linker relaxation (without
|
which this function would not be used) could change the operand by
|
which this function would not be used) could change the operand by
|
an unknown amount. If the address increment is getting close to
|
an unknown amount. If the address increment is getting close to
|
the limit, just reset the address. */
|
the limit, just reset the address. */
|
if (addr_delta > 50000)
|
if (addr_delta > 50000)
|
{
|
{
|
symbolS *to_sym;
|
symbolS *to_sym;
|
expressionS exp;
|
expressionS exp;
|
|
|
gas_assert (pexp->X_op == O_subtract);
|
gas_assert (pexp->X_op == O_subtract);
|
to_sym = pexp->X_add_symbol;
|
to_sym = pexp->X_add_symbol;
|
|
|
*p++ = DW_LNS_extended_op;
|
*p++ = DW_LNS_extended_op;
|
p += output_leb128 (p, sizeof_address + 1, 0);
|
p += output_leb128 (p, sizeof_address + 1, 0);
|
*p++ = DW_LNE_set_address;
|
*p++ = DW_LNE_set_address;
|
exp.X_op = O_symbol;
|
exp.X_op = O_symbol;
|
exp.X_add_symbol = to_sym;
|
exp.X_add_symbol = to_sym;
|
exp.X_add_number = 0;
|
exp.X_add_number = 0;
|
subseg_change (line_seg, 0);
|
subseg_change (line_seg, 0);
|
emit_expr_fix (&exp, sizeof_address, frag, p);
|
emit_expr_fix (&exp, sizeof_address, frag, p);
|
p += sizeof_address;
|
p += sizeof_address;
|
}
|
}
|
else
|
else
|
{
|
{
|
*p++ = DW_LNS_fixed_advance_pc;
|
*p++ = DW_LNS_fixed_advance_pc;
|
subseg_change (line_seg, 0);
|
subseg_change (line_seg, 0);
|
emit_expr_fix (pexp, 2, frag, p);
|
emit_expr_fix (pexp, 2, frag, p);
|
p += 2;
|
p += 2;
|
}
|
}
|
|
|
if (line_delta == INT_MAX)
|
if (line_delta == INT_MAX)
|
{
|
{
|
*p++ = DW_LNS_extended_op;
|
*p++ = DW_LNS_extended_op;
|
*p++ = 1;
|
*p++ = 1;
|
*p++ = DW_LNE_end_sequence;
|
*p++ = DW_LNE_end_sequence;
|
}
|
}
|
else
|
else
|
*p++ = DW_LNS_copy;
|
*p++ = DW_LNS_copy;
|
|
|
gas_assert (p == end);
|
gas_assert (p == end);
|
}
|
}
|
|
|
/* Generate a variant frag that we can use to relax address/line
|
/* Generate a variant frag that we can use to relax address/line
|
increments between fragments of the target segment. */
|
increments between fragments of the target segment. */
|
|
|
static void
|
static void
|
relax_inc_line_addr (int line_delta, symbolS *to_sym, symbolS *from_sym)
|
relax_inc_line_addr (int line_delta, symbolS *to_sym, symbolS *from_sym)
|
{
|
{
|
expressionS exp;
|
expressionS exp;
|
int max_chars;
|
int max_chars;
|
|
|
exp.X_op = O_subtract;
|
exp.X_op = O_subtract;
|
exp.X_add_symbol = to_sym;
|
exp.X_add_symbol = to_sym;
|
exp.X_op_symbol = from_sym;
|
exp.X_op_symbol = from_sym;
|
exp.X_add_number = 0;
|
exp.X_add_number = 0;
|
|
|
/* The maximum size of the frag is the line delta with a maximum
|
/* The maximum size of the frag is the line delta with a maximum
|
sized address delta. */
|
sized address delta. */
|
if (DWARF2_USE_FIXED_ADVANCE_PC)
|
if (DWARF2_USE_FIXED_ADVANCE_PC)
|
max_chars = size_fixed_inc_line_addr (line_delta,
|
max_chars = size_fixed_inc_line_addr (line_delta,
|
-DWARF2_LINE_MIN_INSN_LENGTH);
|
-DWARF2_LINE_MIN_INSN_LENGTH);
|
else
|
else
|
max_chars = size_inc_line_addr (line_delta, -DWARF2_LINE_MIN_INSN_LENGTH);
|
max_chars = size_inc_line_addr (line_delta, -DWARF2_LINE_MIN_INSN_LENGTH);
|
|
|
frag_var (rs_dwarf2dbg, max_chars, max_chars, 1,
|
frag_var (rs_dwarf2dbg, max_chars, max_chars, 1,
|
make_expr_symbol (&exp), line_delta, NULL);
|
make_expr_symbol (&exp), line_delta, NULL);
|
}
|
}
|
|
|
/* The function estimates the size of a rs_dwarf2dbg variant frag
|
/* The function estimates the size of a rs_dwarf2dbg variant frag
|
based on the current values of the symbols. It is called before
|
based on the current values of the symbols. It is called before
|
the relaxation loop. We set fr_subtype to the expected length. */
|
the relaxation loop. We set fr_subtype to the expected length. */
|
|
|
int
|
int
|
dwarf2dbg_estimate_size_before_relax (fragS *frag)
|
dwarf2dbg_estimate_size_before_relax (fragS *frag)
|
{
|
{
|
offsetT addr_delta;
|
offsetT addr_delta;
|
int size;
|
int size;
|
|
|
addr_delta = resolve_symbol_value (frag->fr_symbol);
|
addr_delta = resolve_symbol_value (frag->fr_symbol);
|
if (DWARF2_USE_FIXED_ADVANCE_PC)
|
if (DWARF2_USE_FIXED_ADVANCE_PC)
|
size = size_fixed_inc_line_addr (frag->fr_offset, addr_delta);
|
size = size_fixed_inc_line_addr (frag->fr_offset, addr_delta);
|
else
|
else
|
size = size_inc_line_addr (frag->fr_offset, addr_delta);
|
size = size_inc_line_addr (frag->fr_offset, addr_delta);
|
|
|
frag->fr_subtype = size;
|
frag->fr_subtype = size;
|
|
|
return size;
|
return size;
|
}
|
}
|
|
|
/* This function relaxes a rs_dwarf2dbg variant frag based on the
|
/* This function relaxes a rs_dwarf2dbg variant frag based on the
|
current values of the symbols. fr_subtype is the current length
|
current values of the symbols. fr_subtype is the current length
|
of the frag. This returns the change in frag length. */
|
of the frag. This returns the change in frag length. */
|
|
|
int
|
int
|
dwarf2dbg_relax_frag (fragS *frag)
|
dwarf2dbg_relax_frag (fragS *frag)
|
{
|
{
|
int old_size, new_size;
|
int old_size, new_size;
|
|
|
old_size = frag->fr_subtype;
|
old_size = frag->fr_subtype;
|
new_size = dwarf2dbg_estimate_size_before_relax (frag);
|
new_size = dwarf2dbg_estimate_size_before_relax (frag);
|
|
|
return new_size - old_size;
|
return new_size - old_size;
|
}
|
}
|
|
|
/* This function converts a rs_dwarf2dbg variant frag into a normal
|
/* This function converts a rs_dwarf2dbg variant frag into a normal
|
fill frag. This is called after all relaxation has been done.
|
fill frag. This is called after all relaxation has been done.
|
fr_subtype will be the desired length of the frag. */
|
fr_subtype will be the desired length of the frag. */
|
|
|
void
|
void
|
dwarf2dbg_convert_frag (fragS *frag)
|
dwarf2dbg_convert_frag (fragS *frag)
|
{
|
{
|
offsetT addr_diff;
|
offsetT addr_diff;
|
|
|
addr_diff = resolve_symbol_value (frag->fr_symbol);
|
addr_diff = resolve_symbol_value (frag->fr_symbol);
|
|
|
/* fr_var carries the max_chars that we created the fragment with.
|
/* fr_var carries the max_chars that we created the fragment with.
|
fr_subtype carries the current expected length. We must, of
|
fr_subtype carries the current expected length. We must, of
|
course, have allocated enough memory earlier. */
|
course, have allocated enough memory earlier. */
|
gas_assert (frag->fr_var >= (int) frag->fr_subtype);
|
gas_assert (frag->fr_var >= (int) frag->fr_subtype);
|
|
|
if (DWARF2_USE_FIXED_ADVANCE_PC)
|
if (DWARF2_USE_FIXED_ADVANCE_PC)
|
emit_fixed_inc_line_addr (frag->fr_offset, addr_diff, frag,
|
emit_fixed_inc_line_addr (frag->fr_offset, addr_diff, frag,
|
frag->fr_literal + frag->fr_fix,
|
frag->fr_literal + frag->fr_fix,
|
frag->fr_subtype);
|
frag->fr_subtype);
|
else
|
else
|
emit_inc_line_addr (frag->fr_offset, addr_diff,
|
emit_inc_line_addr (frag->fr_offset, addr_diff,
|
frag->fr_literal + frag->fr_fix, frag->fr_subtype);
|
frag->fr_literal + frag->fr_fix, frag->fr_subtype);
|
|
|
frag->fr_fix += frag->fr_subtype;
|
frag->fr_fix += frag->fr_subtype;
|
frag->fr_type = rs_fill;
|
frag->fr_type = rs_fill;
|
frag->fr_var = 0;
|
frag->fr_var = 0;
|
frag->fr_offset = 0;
|
frag->fr_offset = 0;
|
}
|
}
|
|
|
/* Generate .debug_line content for the chain of line number entries
|
/* Generate .debug_line content for the chain of line number entries
|
beginning at E, for segment SEG. */
|
beginning at E, for segment SEG. */
|
|
|
static void
|
static void
|
process_entries (segT seg, struct line_entry *e)
|
process_entries (segT seg, struct line_entry *e)
|
{
|
{
|
unsigned filenum = 1;
|
unsigned filenum = 1;
|
unsigned line = 1;
|
unsigned line = 1;
|
unsigned column = 0;
|
unsigned column = 0;
|
unsigned isa = 0;
|
unsigned isa = 0;
|
unsigned flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0;
|
unsigned flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0;
|
fragS *last_frag = NULL, *frag;
|
fragS *last_frag = NULL, *frag;
|
addressT last_frag_ofs = 0, frag_ofs;
|
addressT last_frag_ofs = 0, frag_ofs;
|
symbolS *last_lab = NULL, *lab;
|
symbolS *last_lab = NULL, *lab;
|
struct line_entry *next;
|
struct line_entry *next;
|
|
|
do
|
do
|
{
|
{
|
int line_delta;
|
int line_delta;
|
|
|
if (filenum != e->loc.filenum)
|
if (filenum != e->loc.filenum)
|
{
|
{
|
filenum = e->loc.filenum;
|
filenum = e->loc.filenum;
|
out_opcode (DW_LNS_set_file);
|
out_opcode (DW_LNS_set_file);
|
out_uleb128 (filenum);
|
out_uleb128 (filenum);
|
}
|
}
|
|
|
if (column != e->loc.column)
|
if (column != e->loc.column)
|
{
|
{
|
column = e->loc.column;
|
column = e->loc.column;
|
out_opcode (DW_LNS_set_column);
|
out_opcode (DW_LNS_set_column);
|
out_uleb128 (column);
|
out_uleb128 (column);
|
}
|
}
|
|
|
if (e->loc.discriminator != 0)
|
if (e->loc.discriminator != 0)
|
{
|
{
|
out_opcode (DW_LNS_extended_op);
|
out_opcode (DW_LNS_extended_op);
|
out_leb128 (1 + sizeof_leb128 (e->loc.discriminator, 0));
|
out_leb128 (1 + sizeof_leb128 (e->loc.discriminator, 0));
|
out_opcode (DW_LNE_set_discriminator);
|
out_opcode (DW_LNE_set_discriminator);
|
out_uleb128 (e->loc.discriminator);
|
out_uleb128 (e->loc.discriminator);
|
}
|
}
|
|
|
if (isa != e->loc.isa)
|
if (isa != e->loc.isa)
|
{
|
{
|
isa = e->loc.isa;
|
isa = e->loc.isa;
|
out_opcode (DW_LNS_set_isa);
|
out_opcode (DW_LNS_set_isa);
|
out_uleb128 (isa);
|
out_uleb128 (isa);
|
}
|
}
|
|
|
if ((e->loc.flags ^ flags) & DWARF2_FLAG_IS_STMT)
|
if ((e->loc.flags ^ flags) & DWARF2_FLAG_IS_STMT)
|
{
|
{
|
flags = e->loc.flags;
|
flags = e->loc.flags;
|
out_opcode (DW_LNS_negate_stmt);
|
out_opcode (DW_LNS_negate_stmt);
|
}
|
}
|
|
|
if (e->loc.flags & DWARF2_FLAG_BASIC_BLOCK)
|
if (e->loc.flags & DWARF2_FLAG_BASIC_BLOCK)
|
out_opcode (DW_LNS_set_basic_block);
|
out_opcode (DW_LNS_set_basic_block);
|
|
|
if (e->loc.flags & DWARF2_FLAG_PROLOGUE_END)
|
if (e->loc.flags & DWARF2_FLAG_PROLOGUE_END)
|
out_opcode (DW_LNS_set_prologue_end);
|
out_opcode (DW_LNS_set_prologue_end);
|
|
|
if (e->loc.flags & DWARF2_FLAG_EPILOGUE_BEGIN)
|
if (e->loc.flags & DWARF2_FLAG_EPILOGUE_BEGIN)
|
out_opcode (DW_LNS_set_epilogue_begin);
|
out_opcode (DW_LNS_set_epilogue_begin);
|
|
|
/* Don't try to optimize away redundant entries; gdb wants two
|
/* Don't try to optimize away redundant entries; gdb wants two
|
entries for a function where the code starts on the same line as
|
entries for a function where the code starts on the same line as
|
the {, and there's no way to identify that case here. Trust gcc
|
the {, and there's no way to identify that case here. Trust gcc
|
to optimize appropriately. */
|
to optimize appropriately. */
|
line_delta = e->loc.line - line;
|
line_delta = e->loc.line - line;
|
lab = e->label;
|
lab = e->label;
|
frag = symbol_get_frag (lab);
|
frag = symbol_get_frag (lab);
|
frag_ofs = S_GET_VALUE (lab);
|
frag_ofs = S_GET_VALUE (lab);
|
|
|
if (last_frag == NULL)
|
if (last_frag == NULL)
|
{
|
{
|
out_set_addr (lab);
|
out_set_addr (lab);
|
out_inc_line_addr (line_delta, 0);
|
out_inc_line_addr (line_delta, 0);
|
}
|
}
|
else if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC)
|
else if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC)
|
out_inc_line_addr (line_delta, frag_ofs - last_frag_ofs);
|
out_inc_line_addr (line_delta, frag_ofs - last_frag_ofs);
|
else
|
else
|
relax_inc_line_addr (line_delta, lab, last_lab);
|
relax_inc_line_addr (line_delta, lab, last_lab);
|
|
|
line = e->loc.line;
|
line = e->loc.line;
|
last_lab = lab;
|
last_lab = lab;
|
last_frag = frag;
|
last_frag = frag;
|
last_frag_ofs = frag_ofs;
|
last_frag_ofs = frag_ofs;
|
|
|
next = e->next;
|
next = e->next;
|
free (e);
|
free (e);
|
e = next;
|
e = next;
|
}
|
}
|
while (e);
|
while (e);
|
|
|
/* Emit a DW_LNE_end_sequence for the end of the section. */
|
/* Emit a DW_LNE_end_sequence for the end of the section. */
|
frag = last_frag_for_seg (seg);
|
frag = last_frag_for_seg (seg);
|
frag_ofs = get_frag_fix (frag, seg);
|
frag_ofs = get_frag_fix (frag, seg);
|
if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC)
|
if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC)
|
out_inc_line_addr (INT_MAX, frag_ofs - last_frag_ofs);
|
out_inc_line_addr (INT_MAX, frag_ofs - last_frag_ofs);
|
else
|
else
|
{
|
{
|
lab = symbol_temp_new (seg, frag_ofs, frag);
|
lab = symbol_temp_new (seg, frag_ofs, frag);
|
relax_inc_line_addr (INT_MAX, lab, last_lab);
|
relax_inc_line_addr (INT_MAX, lab, last_lab);
|
}
|
}
|
}
|
}
|
|
|
/* Emit the directory and file tables for .debug_line. */
|
/* Emit the directory and file tables for .debug_line. */
|
|
|
static void
|
static void
|
out_file_list (void)
|
out_file_list (void)
|
{
|
{
|
size_t size;
|
size_t size;
|
const char *dir;
|
const char *dir;
|
char *cp;
|
char *cp;
|
unsigned int i;
|
unsigned int i;
|
|
|
/* Emit directory list. */
|
/* Emit directory list. */
|
for (i = 1; i < dirs_in_use; ++i)
|
for (i = 1; i < dirs_in_use; ++i)
|
{
|
{
|
dir = remap_debug_filename (dirs[i]);
|
dir = remap_debug_filename (dirs[i]);
|
size = strlen (dir) + 1;
|
size = strlen (dir) + 1;
|
cp = frag_more (size);
|
cp = frag_more (size);
|
memcpy (cp, dir, size);
|
memcpy (cp, dir, size);
|
}
|
}
|
/* Terminate it. */
|
/* Terminate it. */
|
out_byte ('\0');
|
out_byte ('\0');
|
|
|
for (i = 1; i < files_in_use; ++i)
|
for (i = 1; i < files_in_use; ++i)
|
{
|
{
|
const char *fullfilename;
|
const char *fullfilename;
|
|
|
if (files[i].filename == NULL)
|
if (files[i].filename == NULL)
|
{
|
{
|
as_bad (_("unassigned file number %ld"), (long) i);
|
as_bad (_("unassigned file number %ld"), (long) i);
|
/* Prevent a crash later, particularly for file 1. */
|
/* Prevent a crash later, particularly for file 1. */
|
files[i].filename = "";
|
files[i].filename = "";
|
continue;
|
continue;
|
}
|
}
|
|
|
fullfilename = DWARF2_FILE_NAME (files[i].filename,
|
fullfilename = DWARF2_FILE_NAME (files[i].filename,
|
files[i].dir ? dirs [files [i].dir] : "");
|
files[i].dir ? dirs [files [i].dir] : "");
|
size = strlen (fullfilename) + 1;
|
size = strlen (fullfilename) + 1;
|
cp = frag_more (size);
|
cp = frag_more (size);
|
memcpy (cp, fullfilename, size);
|
memcpy (cp, fullfilename, size);
|
|
|
out_uleb128 (files[i].dir); /* directory number */
|
out_uleb128 (files[i].dir); /* directory number */
|
/* Output the last modification timestamp. */
|
/* Output the last modification timestamp. */
|
out_uleb128 (DWARF2_FILE_TIME_NAME (files[i].filename,
|
out_uleb128 (DWARF2_FILE_TIME_NAME (files[i].filename,
|
files[i].dir ? dirs [files [i].dir] : ""));
|
files[i].dir ? dirs [files [i].dir] : ""));
|
/* Output the filesize. */
|
/* Output the filesize. */
|
out_uleb128 (DWARF2_FILE_SIZE_NAME (files[i].filename,
|
out_uleb128 (DWARF2_FILE_SIZE_NAME (files[i].filename,
|
files[i].dir ? dirs [files [i].dir] : ""));
|
files[i].dir ? dirs [files [i].dir] : ""));
|
}
|
}
|
|
|
/* Terminate filename list. */
|
/* Terminate filename list. */
|
out_byte (0);
|
out_byte (0);
|
}
|
}
|
|
|
/* Switch to SEC and output a header length field. Return the size of
|
/* Switch to SEC and output a header length field. Return the size of
|
offsets used in SEC. The caller must set EXPR->X_add_symbol value
|
offsets used in SEC. The caller must set EXPR->X_add_symbol value
|
to the end of the section. */
|
to the end of the section. */
|
|
|
static int
|
static int
|
out_header (asection *sec, expressionS *exp)
|
out_header (asection *sec, expressionS *exp)
|
{
|
{
|
symbolS *start_sym;
|
symbolS *start_sym;
|
symbolS *end_sym;
|
symbolS *end_sym;
|
|
|
subseg_set (sec, 0);
|
subseg_set (sec, 0);
|
start_sym = symbol_temp_new_now ();;
|
start_sym = symbol_temp_new_now ();;
|
end_sym = symbol_temp_make ();
|
end_sym = symbol_temp_make ();
|
|
|
/* Total length of the information. */
|
/* Total length of the information. */
|
exp->X_op = O_subtract;
|
exp->X_op = O_subtract;
|
exp->X_add_symbol = end_sym;
|
exp->X_add_symbol = end_sym;
|
exp->X_op_symbol = start_sym;
|
exp->X_op_symbol = start_sym;
|
|
|
switch (DWARF2_FORMAT (sec))
|
switch (DWARF2_FORMAT (sec))
|
{
|
{
|
case dwarf2_format_32bit:
|
case dwarf2_format_32bit:
|
exp->X_add_number = -4;
|
exp->X_add_number = -4;
|
emit_expr (exp, 4);
|
emit_expr (exp, 4);
|
return 4;
|
return 4;
|
|
|
case dwarf2_format_64bit:
|
case dwarf2_format_64bit:
|
exp->X_add_number = -12;
|
exp->X_add_number = -12;
|
out_four (-1);
|
out_four (-1);
|
emit_expr (exp, 8);
|
emit_expr (exp, 8);
|
return 8;
|
return 8;
|
|
|
case dwarf2_format_64bit_irix:
|
case dwarf2_format_64bit_irix:
|
exp->X_add_number = -8;
|
exp->X_add_number = -8;
|
emit_expr (exp, 8);
|
emit_expr (exp, 8);
|
return 8;
|
return 8;
|
}
|
}
|
|
|
as_fatal (_("internal error: unknown dwarf2 format"));
|
as_fatal (_("internal error: unknown dwarf2 format"));
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Emit the collected .debug_line data. */
|
/* Emit the collected .debug_line data. */
|
|
|
static void
|
static void
|
out_debug_line (segT line_seg)
|
out_debug_line (segT line_seg)
|
{
|
{
|
expressionS exp;
|
expressionS exp;
|
symbolS *prologue_end;
|
symbolS *prologue_end;
|
symbolS *line_end;
|
symbolS *line_end;
|
struct line_seg *s;
|
struct line_seg *s;
|
int sizeof_offset;
|
int sizeof_offset;
|
|
|
sizeof_offset = out_header (line_seg, &exp);
|
sizeof_offset = out_header (line_seg, &exp);
|
line_end = exp.X_add_symbol;
|
line_end = exp.X_add_symbol;
|
|
|
/* Version. */
|
/* Version. */
|
out_two (DWARF2_VERSION);
|
out_two (DWARF2_VERSION);
|
|
|
/* Length of the prologue following this length. */
|
/* Length of the prologue following this length. */
|
prologue_end = symbol_temp_make ();
|
prologue_end = symbol_temp_make ();
|
exp.X_add_symbol = prologue_end;
|
exp.X_add_symbol = prologue_end;
|
exp.X_add_number = - (4 + 2 + 4);
|
exp.X_add_number = - (4 + 2 + 4);
|
emit_expr (&exp, sizeof_offset);
|
emit_expr (&exp, sizeof_offset);
|
|
|
/* Parameters of the state machine. */
|
/* Parameters of the state machine. */
|
out_byte (DWARF2_LINE_MIN_INSN_LENGTH);
|
out_byte (DWARF2_LINE_MIN_INSN_LENGTH);
|
out_byte (DWARF2_LINE_DEFAULT_IS_STMT);
|
out_byte (DWARF2_LINE_DEFAULT_IS_STMT);
|
out_byte (DWARF2_LINE_BASE);
|
out_byte (DWARF2_LINE_BASE);
|
out_byte (DWARF2_LINE_RANGE);
|
out_byte (DWARF2_LINE_RANGE);
|
out_byte (DWARF2_LINE_OPCODE_BASE);
|
out_byte (DWARF2_LINE_OPCODE_BASE);
|
|
|
/* Standard opcode lengths. */
|
/* Standard opcode lengths. */
|
out_byte (0); /* DW_LNS_copy */
|
out_byte (0); /* DW_LNS_copy */
|
out_byte (1); /* DW_LNS_advance_pc */
|
out_byte (1); /* DW_LNS_advance_pc */
|
out_byte (1); /* DW_LNS_advance_line */
|
out_byte (1); /* DW_LNS_advance_line */
|
out_byte (1); /* DW_LNS_set_file */
|
out_byte (1); /* DW_LNS_set_file */
|
out_byte (1); /* DW_LNS_set_column */
|
out_byte (1); /* DW_LNS_set_column */
|
out_byte (0); /* DW_LNS_negate_stmt */
|
out_byte (0); /* DW_LNS_negate_stmt */
|
out_byte (0); /* DW_LNS_set_basic_block */
|
out_byte (0); /* DW_LNS_set_basic_block */
|
out_byte (0); /* DW_LNS_const_add_pc */
|
out_byte (0); /* DW_LNS_const_add_pc */
|
out_byte (1); /* DW_LNS_fixed_advance_pc */
|
out_byte (1); /* DW_LNS_fixed_advance_pc */
|
out_byte (0); /* DW_LNS_set_prologue_end */
|
out_byte (0); /* DW_LNS_set_prologue_end */
|
out_byte (0); /* DW_LNS_set_epilogue_begin */
|
out_byte (0); /* DW_LNS_set_epilogue_begin */
|
out_byte (1); /* DW_LNS_set_isa */
|
out_byte (1); /* DW_LNS_set_isa */
|
|
|
out_file_list ();
|
out_file_list ();
|
|
|
symbol_set_value_now (prologue_end);
|
symbol_set_value_now (prologue_end);
|
|
|
/* For each section, emit a statement program. */
|
/* For each section, emit a statement program. */
|
for (s = all_segs; s; s = s->next)
|
for (s = all_segs; s; s = s->next)
|
|
if (SEG_NORMAL (s->seg))
|
process_entries (s->seg, s->head->head);
|
process_entries (s->seg, s->head->head);
|
|
else
|
|
as_warn ("dwarf line number information for %s ignored",
|
|
segment_name (s->seg));
|
|
|
symbol_set_value_now (line_end);
|
symbol_set_value_now (line_end);
|
}
|
}
|
|
|
static void
|
static void
|
out_debug_ranges (segT ranges_seg)
|
out_debug_ranges (segT ranges_seg)
|
{
|
{
|
unsigned int addr_size = sizeof_address;
|
unsigned int addr_size = sizeof_address;
|
struct line_seg *s;
|
struct line_seg *s;
|
expressionS exp;
|
expressionS exp;
|
unsigned int i;
|
unsigned int i;
|
|
|
subseg_set (ranges_seg, 0);
|
subseg_set (ranges_seg, 0);
|
|
|
/* Base Address Entry. */
|
/* Base Address Entry. */
|
for (i = 0; i < addr_size; i++)
|
for (i = 0; i < addr_size; i++)
|
out_byte (0xff);
|
out_byte (0xff);
|
for (i = 0; i < addr_size; i++)
|
for (i = 0; i < addr_size; i++)
|
out_byte (0);
|
out_byte (0);
|
|
|
/* Range List Entry. */
|
/* Range List Entry. */
|
for (s = all_segs; s; s = s->next)
|
for (s = all_segs; s; s = s->next)
|
{
|
{
|
fragS *frag;
|
fragS *frag;
|
symbolS *beg, *end;
|
symbolS *beg, *end;
|
|
|
frag = first_frag_for_seg (s->seg);
|
frag = first_frag_for_seg (s->seg);
|
beg = symbol_temp_new (s->seg, 0, frag);
|
beg = symbol_temp_new (s->seg, 0, frag);
|
s->text_start = beg;
|
s->text_start = beg;
|
|
|
frag = last_frag_for_seg (s->seg);
|
frag = last_frag_for_seg (s->seg);
|
end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag);
|
end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag);
|
s->text_end = end;
|
s->text_end = end;
|
|
|
exp.X_op = O_symbol;
|
exp.X_op = O_symbol;
|
exp.X_add_symbol = beg;
|
exp.X_add_symbol = beg;
|
exp.X_add_number = 0;
|
exp.X_add_number = 0;
|
emit_expr (&exp, addr_size);
|
emit_expr (&exp, addr_size);
|
|
|
exp.X_op = O_symbol;
|
exp.X_op = O_symbol;
|
exp.X_add_symbol = end;
|
exp.X_add_symbol = end;
|
exp.X_add_number = 0;
|
exp.X_add_number = 0;
|
emit_expr (&exp, addr_size);
|
emit_expr (&exp, addr_size);
|
}
|
}
|
|
|
/* End of Range Entry. */
|
/* End of Range Entry. */
|
for (i = 0; i < addr_size; i++)
|
for (i = 0; i < addr_size; i++)
|
out_byte (0);
|
out_byte (0);
|
for (i = 0; i < addr_size; i++)
|
for (i = 0; i < addr_size; i++)
|
out_byte (0);
|
out_byte (0);
|
}
|
}
|
|
|
/* Emit data for .debug_aranges. */
|
/* Emit data for .debug_aranges. */
|
|
|
static void
|
static void
|
out_debug_aranges (segT aranges_seg, segT info_seg)
|
out_debug_aranges (segT aranges_seg, segT info_seg)
|
{
|
{
|
unsigned int addr_size = sizeof_address;
|
unsigned int addr_size = sizeof_address;
|
struct line_seg *s;
|
struct line_seg *s;
|
expressionS exp;
|
expressionS exp;
|
symbolS *aranges_end;
|
symbolS *aranges_end;
|
char *p;
|
char *p;
|
int sizeof_offset;
|
int sizeof_offset;
|
|
|
sizeof_offset = out_header (aranges_seg, &exp);
|
sizeof_offset = out_header (aranges_seg, &exp);
|
aranges_end = exp.X_add_symbol;
|
aranges_end = exp.X_add_symbol;
|
|
|
/* Version. */
|
/* Version. */
|
out_two (DWARF2_VERSION);
|
out_two (DWARF2_VERSION);
|
|
|
/* Offset to .debug_info. */
|
/* Offset to .debug_info. */
|
TC_DWARF2_EMIT_OFFSET (section_symbol (info_seg), sizeof_offset);
|
TC_DWARF2_EMIT_OFFSET (section_symbol (info_seg), sizeof_offset);
|
|
|
/* Size of an address (offset portion). */
|
/* Size of an address (offset portion). */
|
out_byte (addr_size);
|
out_byte (addr_size);
|
|
|
/* Size of a segment descriptor. */
|
/* Size of a segment descriptor. */
|
out_byte (0);
|
out_byte (0);
|
|
|
/* Align the header. */
|
/* Align the header. */
|
frag_align (ffs (2 * addr_size) - 1, 0, 0);
|
frag_align (ffs (2 * addr_size) - 1, 0, 0);
|
|
|
for (s = all_segs; s; s = s->next)
|
for (s = all_segs; s; s = s->next)
|
{
|
{
|
fragS *frag;
|
fragS *frag;
|
symbolS *beg, *end;
|
symbolS *beg, *end;
|
|
|
frag = first_frag_for_seg (s->seg);
|
frag = first_frag_for_seg (s->seg);
|
beg = symbol_temp_new (s->seg, 0, frag);
|
beg = symbol_temp_new (s->seg, 0, frag);
|
s->text_start = beg;
|
s->text_start = beg;
|
|
|
frag = last_frag_for_seg (s->seg);
|
frag = last_frag_for_seg (s->seg);
|
end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag);
|
end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag);
|
s->text_end = end;
|
s->text_end = end;
|
|
|
exp.X_op = O_symbol;
|
exp.X_op = O_symbol;
|
exp.X_add_symbol = beg;
|
exp.X_add_symbol = beg;
|
exp.X_add_number = 0;
|
exp.X_add_number = 0;
|
emit_expr (&exp, addr_size);
|
emit_expr (&exp, addr_size);
|
|
|
exp.X_op = O_subtract;
|
exp.X_op = O_subtract;
|
exp.X_add_symbol = end;
|
exp.X_add_symbol = end;
|
exp.X_op_symbol = beg;
|
exp.X_op_symbol = beg;
|
exp.X_add_number = 0;
|
exp.X_add_number = 0;
|
emit_expr (&exp, addr_size);
|
emit_expr (&exp, addr_size);
|
}
|
}
|
|
|
p = frag_more (2 * addr_size);
|
p = frag_more (2 * addr_size);
|
md_number_to_chars (p, 0, addr_size);
|
md_number_to_chars (p, 0, addr_size);
|
md_number_to_chars (p + addr_size, 0, addr_size);
|
md_number_to_chars (p + addr_size, 0, addr_size);
|
|
|
symbol_set_value_now (aranges_end);
|
symbol_set_value_now (aranges_end);
|
}
|
}
|
|
|
/* Emit data for .debug_abbrev. Note that this must be kept in
|
/* Emit data for .debug_abbrev. Note that this must be kept in
|
sync with out_debug_info below. */
|
sync with out_debug_info below. */
|
|
|
static void
|
static void
|
out_debug_abbrev (segT abbrev_seg,
|
out_debug_abbrev (segT abbrev_seg,
|
segT info_seg ATTRIBUTE_UNUSED,
|
segT info_seg ATTRIBUTE_UNUSED,
|
segT line_seg ATTRIBUTE_UNUSED)
|
segT line_seg ATTRIBUTE_UNUSED)
|
{
|
{
|
subseg_set (abbrev_seg, 0);
|
subseg_set (abbrev_seg, 0);
|
|
|
out_uleb128 (1);
|
out_uleb128 (1);
|
out_uleb128 (DW_TAG_compile_unit);
|
out_uleb128 (DW_TAG_compile_unit);
|
out_byte (DW_CHILDREN_no);
|
out_byte (DW_CHILDREN_no);
|
if (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit)
|
if (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit)
|
out_abbrev (DW_AT_stmt_list, DW_FORM_data4);
|
out_abbrev (DW_AT_stmt_list, DW_FORM_data4);
|
else
|
else
|
out_abbrev (DW_AT_stmt_list, DW_FORM_data8);
|
out_abbrev (DW_AT_stmt_list, DW_FORM_data8);
|
if (all_segs->next == NULL)
|
if (all_segs->next == NULL)
|
{
|
{
|
out_abbrev (DW_AT_low_pc, DW_FORM_addr);
|
out_abbrev (DW_AT_low_pc, DW_FORM_addr);
|
out_abbrev (DW_AT_high_pc, DW_FORM_addr);
|
out_abbrev (DW_AT_high_pc, DW_FORM_addr);
|
}
|
}
|
else
|
else
|
{
|
{
|
if (DWARF2_FORMAT (info_seg) == dwarf2_format_32bit)
|
if (DWARF2_FORMAT (info_seg) == dwarf2_format_32bit)
|
out_abbrev (DW_AT_ranges, DW_FORM_data4);
|
out_abbrev (DW_AT_ranges, DW_FORM_data4);
|
else
|
else
|
out_abbrev (DW_AT_ranges, DW_FORM_data8);
|
out_abbrev (DW_AT_ranges, DW_FORM_data8);
|
}
|
}
|
out_abbrev (DW_AT_name, DW_FORM_string);
|
out_abbrev (DW_AT_name, DW_FORM_string);
|
out_abbrev (DW_AT_comp_dir, DW_FORM_string);
|
out_abbrev (DW_AT_comp_dir, DW_FORM_string);
|
out_abbrev (DW_AT_producer, DW_FORM_string);
|
out_abbrev (DW_AT_producer, DW_FORM_string);
|
out_abbrev (DW_AT_language, DW_FORM_data2);
|
out_abbrev (DW_AT_language, DW_FORM_data2);
|
out_abbrev (0, 0);
|
out_abbrev (0, 0);
|
|
|
/* Terminate the abbreviations for this compilation unit. */
|
/* Terminate the abbreviations for this compilation unit. */
|
out_byte (0);
|
out_byte (0);
|
}
|
}
|
|
|
/* Emit a description of this compilation unit for .debug_info. */
|
/* Emit a description of this compilation unit for .debug_info. */
|
|
|
static void
|
static void
|
out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg, segT ranges_seg)
|
out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg, segT ranges_seg)
|
{
|
{
|
char producer[128];
|
char producer[128];
|
const char *comp_dir;
|
const char *comp_dir;
|
const char *dirname;
|
const char *dirname;
|
expressionS exp;
|
expressionS exp;
|
symbolS *info_end;
|
symbolS *info_end;
|
char *p;
|
char *p;
|
int len;
|
int len;
|
int sizeof_offset;
|
int sizeof_offset;
|
|
|
sizeof_offset = out_header (info_seg, &exp);
|
sizeof_offset = out_header (info_seg, &exp);
|
info_end = exp.X_add_symbol;
|
info_end = exp.X_add_symbol;
|
|
|
/* DWARF version. */
|
/* DWARF version. */
|
out_two (DWARF2_VERSION);
|
out_two (DWARF2_VERSION);
|
|
|
/* .debug_abbrev offset */
|
/* .debug_abbrev offset */
|
TC_DWARF2_EMIT_OFFSET (section_symbol (abbrev_seg), sizeof_offset);
|
TC_DWARF2_EMIT_OFFSET (section_symbol (abbrev_seg), sizeof_offset);
|
|
|
/* Target address size. */
|
/* Target address size. */
|
out_byte (sizeof_address);
|
out_byte (sizeof_address);
|
|
|
/* DW_TAG_compile_unit DIE abbrev */
|
/* DW_TAG_compile_unit DIE abbrev */
|
out_uleb128 (1);
|
out_uleb128 (1);
|
|
|
/* DW_AT_stmt_list */
|
/* DW_AT_stmt_list */
|
TC_DWARF2_EMIT_OFFSET (section_symbol (line_seg),
|
TC_DWARF2_EMIT_OFFSET (section_symbol (line_seg),
|
(DWARF2_FORMAT (line_seg) == dwarf2_format_32bit
|
(DWARF2_FORMAT (line_seg) == dwarf2_format_32bit
|
? 4 : 8));
|
? 4 : 8));
|
|
|
/* These two attributes are emitted if all of the code is contiguous. */
|
/* These two attributes are emitted if all of the code is contiguous. */
|
if (all_segs->next == NULL)
|
if (all_segs->next == NULL)
|
{
|
{
|
/* DW_AT_low_pc */
|
/* DW_AT_low_pc */
|
exp.X_op = O_symbol;
|
exp.X_op = O_symbol;
|
exp.X_add_symbol = all_segs->text_start;
|
exp.X_add_symbol = all_segs->text_start;
|
exp.X_add_number = 0;
|
exp.X_add_number = 0;
|
emit_expr (&exp, sizeof_address);
|
emit_expr (&exp, sizeof_address);
|
|
|
/* DW_AT_high_pc */
|
/* DW_AT_high_pc */
|
exp.X_op = O_symbol;
|
exp.X_op = O_symbol;
|
exp.X_add_symbol = all_segs->text_end;
|
exp.X_add_symbol = all_segs->text_end;
|
exp.X_add_number = 0;
|
exp.X_add_number = 0;
|
emit_expr (&exp, sizeof_address);
|
emit_expr (&exp, sizeof_address);
|
}
|
}
|
else
|
else
|
{
|
{
|
/* This attribute is emitted if the code is disjoint. */
|
/* This attribute is emitted if the code is disjoint. */
|
/* DW_AT_ranges. */
|
/* DW_AT_ranges. */
|
TC_DWARF2_EMIT_OFFSET (section_symbol (ranges_seg), sizeof_offset);
|
TC_DWARF2_EMIT_OFFSET (section_symbol (ranges_seg), sizeof_offset);
|
}
|
}
|
|
|
/* DW_AT_name. We don't have the actual file name that was present
|
/* DW_AT_name. We don't have the actual file name that was present
|
on the command line, so assume files[1] is the main input file.
|
on the command line, so assume files[1] is the main input file.
|
We're not supposed to get called unless at least one line number
|
We're not supposed to get called unless at least one line number
|
entry was emitted, so this should always be defined. */
|
entry was emitted, so this should always be defined. */
|
if (files_in_use == 0)
|
if (files_in_use == 0)
|
abort ();
|
abort ();
|
if (files[1].dir)
|
if (files[1].dir)
|
{
|
{
|
dirname = remap_debug_filename (dirs[files[1].dir]);
|
dirname = remap_debug_filename (dirs[files[1].dir]);
|
len = strlen (dirname);
|
len = strlen (dirname);
|
#ifdef TE_VMS
|
#ifdef TE_VMS
|
/* Already has trailing slash. */
|
/* Already has trailing slash. */
|
p = frag_more (len);
|
p = frag_more (len);
|
memcpy (p, dirname, len);
|
memcpy (p, dirname, len);
|
#else
|
#else
|
p = frag_more (len + 1);
|
p = frag_more (len + 1);
|
memcpy (p, dirname, len);
|
memcpy (p, dirname, len);
|
INSERT_DIR_SEPARATOR (p, len);
|
INSERT_DIR_SEPARATOR (p, len);
|
#endif
|
#endif
|
}
|
}
|
len = strlen (files[1].filename) + 1;
|
len = strlen (files[1].filename) + 1;
|
p = frag_more (len);
|
p = frag_more (len);
|
memcpy (p, files[1].filename, len);
|
memcpy (p, files[1].filename, len);
|
|
|
/* DW_AT_comp_dir */
|
/* DW_AT_comp_dir */
|
comp_dir = remap_debug_filename (getpwd ());
|
comp_dir = remap_debug_filename (getpwd ());
|
len = strlen (comp_dir) + 1;
|
len = strlen (comp_dir) + 1;
|
p = frag_more (len);
|
p = frag_more (len);
|
memcpy (p, comp_dir, len);
|
memcpy (p, comp_dir, len);
|
|
|
/* DW_AT_producer */
|
/* DW_AT_producer */
|
sprintf (producer, "GNU AS %s", VERSION);
|
sprintf (producer, "GNU AS %s", VERSION);
|
len = strlen (producer) + 1;
|
len = strlen (producer) + 1;
|
p = frag_more (len);
|
p = frag_more (len);
|
memcpy (p, producer, len);
|
memcpy (p, producer, len);
|
|
|
/* DW_AT_language. Yes, this is probably not really MIPS, but the
|
/* DW_AT_language. Yes, this is probably not really MIPS, but the
|
dwarf2 draft has no standard code for assembler. */
|
dwarf2 draft has no standard code for assembler. */
|
out_two (DW_LANG_Mips_Assembler);
|
out_two (DW_LANG_Mips_Assembler);
|
|
|
symbol_set_value_now (info_end);
|
symbol_set_value_now (info_end);
|
}
|
}
|
|
|
void
|
void
|
dwarf2_init (void)
|
dwarf2_init (void)
|
{
|
{
|
all_segs_hash = hash_new ();
|
all_segs_hash = hash_new ();
|
last_seg_ptr = &all_segs;
|
last_seg_ptr = &all_segs;
|
}
|
}
|
|
|
|
|
/* Finish the dwarf2 debug sections. We emit .debug.line if there
|
/* Finish the dwarf2 debug sections. We emit .debug.line if there
|
were any .file/.loc directives, or --gdwarf2 was given, or if the
|
were any .file/.loc directives, or --gdwarf2 was given, or if the
|
file has a non-empty .debug_info section and an empty .debug_line
|
file has a non-empty .debug_info section and an empty .debug_line
|
section. If we emit .debug_line, and the .debug_info section is
|
section. If we emit .debug_line, and the .debug_info section is
|
empty, we also emit .debug_info, .debug_aranges and .debug_abbrev.
|
empty, we also emit .debug_info, .debug_aranges and .debug_abbrev.
|
ALL_SEGS will be non-null if there were any .file/.loc directives,
|
ALL_SEGS will be non-null if there were any .file/.loc directives,
|
or --gdwarf2 was given and there were any located instructions
|
or --gdwarf2 was given and there were any located instructions
|
emitted. */
|
emitted. */
|
|
|
void
|
void
|
dwarf2_finish (void)
|
dwarf2_finish (void)
|
{
|
{
|
segT line_seg;
|
segT line_seg;
|
struct line_seg *s;
|
struct line_seg *s;
|
segT info_seg;
|
segT info_seg;
|
int emit_other_sections = 0;
|
int emit_other_sections = 0;
|
int empty_debug_line = 0;
|
int empty_debug_line = 0;
|
|
|
info_seg = bfd_get_section_by_name (stdoutput, ".debug_info");
|
info_seg = bfd_get_section_by_name (stdoutput, ".debug_info");
|
emit_other_sections = info_seg == NULL || !seg_not_empty_p (info_seg);
|
emit_other_sections = info_seg == NULL || !seg_not_empty_p (info_seg);
|
|
|
line_seg = bfd_get_section_by_name (stdoutput, ".debug_line");
|
line_seg = bfd_get_section_by_name (stdoutput, ".debug_line");
|
empty_debug_line = line_seg == NULL || !seg_not_empty_p (line_seg);
|
empty_debug_line = line_seg == NULL || !seg_not_empty_p (line_seg);
|
|
|
/* We can't construct a new debug_line section if we already have one.
|
/* We can't construct a new debug_line section if we already have one.
|
Give an error. */
|
Give an error. */
|
if (all_segs && !empty_debug_line)
|
if (all_segs && !empty_debug_line)
|
as_fatal ("duplicate .debug_line sections");
|
as_fatal ("duplicate .debug_line sections");
|
|
|
if ((!all_segs && emit_other_sections)
|
if ((!all_segs && emit_other_sections)
|
|| (!emit_other_sections && !empty_debug_line))
|
|| (!emit_other_sections && !empty_debug_line))
|
/* If there is no line information and no non-empty .debug_info
|
/* If there is no line information and no non-empty .debug_info
|
section, or if there is both a non-empty .debug_info and a non-empty
|
section, or if there is both a non-empty .debug_info and a non-empty
|
.debug_line, then we do nothing. */
|
.debug_line, then we do nothing. */
|
return;
|
return;
|
|
|
/* Calculate the size of an address for the target machine. */
|
/* Calculate the size of an address for the target machine. */
|
sizeof_address = DWARF2_ADDR_SIZE (stdoutput);
|
sizeof_address = DWARF2_ADDR_SIZE (stdoutput);
|
|
|
/* Create and switch to the line number section. */
|
/* Create and switch to the line number section. */
|
line_seg = subseg_new (".debug_line", 0);
|
line_seg = subseg_new (".debug_line", 0);
|
bfd_set_section_flags (stdoutput, line_seg, SEC_READONLY | SEC_DEBUGGING);
|
bfd_set_section_flags (stdoutput, line_seg, SEC_READONLY | SEC_DEBUGGING);
|
|
|
/* For each subsection, chain the debug entries together. */
|
/* For each subsection, chain the debug entries together. */
|
for (s = all_segs; s; s = s->next)
|
for (s = all_segs; s; s = s->next)
|
{
|
{
|
struct line_subseg *lss = s->head;
|
struct line_subseg *lss = s->head;
|
struct line_entry **ptail = lss->ptail;
|
struct line_entry **ptail = lss->ptail;
|
|
|
while ((lss = lss->next) != NULL)
|
while ((lss = lss->next) != NULL)
|
{
|
{
|
*ptail = lss->head;
|
*ptail = lss->head;
|
ptail = lss->ptail;
|
ptail = lss->ptail;
|
}
|
}
|
}
|
}
|
|
|
out_debug_line (line_seg);
|
out_debug_line (line_seg);
|
|
|
/* If this is assembler generated line info, and there is no
|
/* If this is assembler generated line info, and there is no
|
debug_info already, we need .debug_info and .debug_abbrev
|
debug_info already, we need .debug_info and .debug_abbrev
|
sections as well. */
|
sections as well. */
|
if (emit_other_sections)
|
if (emit_other_sections)
|
{
|
{
|
segT abbrev_seg;
|
segT abbrev_seg;
|
segT aranges_seg;
|
segT aranges_seg;
|
segT ranges_seg;
|
segT ranges_seg;
|
|
|
gas_assert (all_segs);
|
gas_assert (all_segs);
|
|
|
info_seg = subseg_new (".debug_info", 0);
|
info_seg = subseg_new (".debug_info", 0);
|
abbrev_seg = subseg_new (".debug_abbrev", 0);
|
abbrev_seg = subseg_new (".debug_abbrev", 0);
|
aranges_seg = subseg_new (".debug_aranges", 0);
|
aranges_seg = subseg_new (".debug_aranges", 0);
|
|
|
bfd_set_section_flags (stdoutput, info_seg,
|
bfd_set_section_flags (stdoutput, info_seg,
|
SEC_READONLY | SEC_DEBUGGING);
|
SEC_READONLY | SEC_DEBUGGING);
|
bfd_set_section_flags (stdoutput, abbrev_seg,
|
bfd_set_section_flags (stdoutput, abbrev_seg,
|
SEC_READONLY | SEC_DEBUGGING);
|
SEC_READONLY | SEC_DEBUGGING);
|
bfd_set_section_flags (stdoutput, aranges_seg,
|
bfd_set_section_flags (stdoutput, aranges_seg,
|
SEC_READONLY | SEC_DEBUGGING);
|
SEC_READONLY | SEC_DEBUGGING);
|
|
|
record_alignment (aranges_seg, ffs (2 * sizeof_address) - 1);
|
record_alignment (aranges_seg, ffs (2 * sizeof_address) - 1);
|
|
|
if (all_segs->next == NULL)
|
if (all_segs->next == NULL)
|
ranges_seg = NULL;
|
ranges_seg = NULL;
|
else
|
else
|
{
|
{
|
ranges_seg = subseg_new (".debug_ranges", 0);
|
ranges_seg = subseg_new (".debug_ranges", 0);
|
bfd_set_section_flags (stdoutput, ranges_seg,
|
bfd_set_section_flags (stdoutput, ranges_seg,
|
SEC_READONLY | SEC_DEBUGGING);
|
SEC_READONLY | SEC_DEBUGGING);
|
record_alignment (ranges_seg, ffs (2 * sizeof_address) - 1);
|
record_alignment (ranges_seg, ffs (2 * sizeof_address) - 1);
|
out_debug_ranges (ranges_seg);
|
out_debug_ranges (ranges_seg);
|
}
|
}
|
|
|
out_debug_aranges (aranges_seg, info_seg);
|
out_debug_aranges (aranges_seg, info_seg);
|
out_debug_abbrev (abbrev_seg, info_seg, line_seg);
|
out_debug_abbrev (abbrev_seg, info_seg, line_seg);
|
out_debug_info (info_seg, abbrev_seg, line_seg, ranges_seg);
|
out_debug_info (info_seg, abbrev_seg, line_seg, ranges_seg);
|
}
|
}
|
}
|
}
|
|
|
