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128 lines
4.4 KiB
C
128 lines
4.4 KiB
C
/* dwarf2dbg.h - DWARF2 debug support
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Copyright (C) 1999-2023 Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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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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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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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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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with 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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02110-1301, USA. */
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#ifndef AS_DWARF2DBG_H
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#define AS_DWARF2DBG_H
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#include "as.h"
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#define DWARF2_FLAG_IS_STMT (1 << 0)
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#define DWARF2_FLAG_BASIC_BLOCK (1 << 1)
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#define DWARF2_FLAG_PROLOGUE_END (1 << 2)
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#define DWARF2_FLAG_EPILOGUE_BEGIN (1 << 3)
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struct dwarf2_line_info
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{
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unsigned int filenum;
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unsigned int line;
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unsigned int column;
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unsigned int isa;
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unsigned int flags;
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unsigned int discriminator;
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/* filenum == -1u chooses filename, otherwise view. */
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union
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{
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symbolS *view;
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const char *filename;
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} u;
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};
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/* Implements the .file FILENO "FILENAME" directive. FILENO can be 0
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to indicate that no file number has been assigned. All real file
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number must be >0. The second form returns the filename extracted
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from the input stream. */
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extern void dwarf2_directive_file (int);
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extern char * dwarf2_directive_filename (void);
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/* Implements the .loc FILENO LINENO [COLUMN] directive. FILENO is
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the file number, LINENO the line number and the (optional) COLUMN
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the column of the source code that the following instruction
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corresponds to. FILENO can be 0 to indicate that the filename
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specified by the textually most recent .file directive should be
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used. */
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extern void dwarf2_directive_loc (int);
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/* Implements the .loc_mark_labels {0,1} directive. */
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extern void dwarf2_directive_loc_mark_labels (int);
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/* Returns the current source information. If .file directives have
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been encountered, the info for the corresponding source file is
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returned. Otherwise, the info for the assembly source file is
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returned. */
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extern void dwarf2_where (struct dwarf2_line_info *);
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/* A hook to allow the target backend to inform the line number state
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machine of isa changes when assembler debug info is enabled. */
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extern void dwarf2_set_isa (unsigned int);
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/* This function generates .debug_line info based on the address and
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source information passed in the arguments. ADDR should be the
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frag-relative offset of the instruction the information is for and
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L is the source information that should be associated with that
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address. */
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extern void dwarf2_gen_line_info (addressT, struct dwarf2_line_info *);
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/* Must be called for each generated instruction. */
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extern void dwarf2_emit_insn (int);
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void dwarf2_move_insn (int);
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/* Reset the state of the line number information to reflect that
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it has been used. */
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extern void dwarf2_consume_line_info (void);
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/* Should be called for each code label. */
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extern void dwarf2_emit_label (symbolS *);
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/* True when we've seen a .loc directive recently. Used to avoid
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doing work when there's nothing to do. */
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extern bool dwarf2_loc_directive_seen;
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/* True when we're supposed to set the basic block mark whenever a label
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is seen. Unless the target is doing Something Weird, just call
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dwarf2_emit_label. */
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extern bool dwarf2_loc_mark_labels;
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extern void dwarf2_init (void);
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extern void dwarf2_finish (void);
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extern int dwarf2dbg_estimate_size_before_relax (fragS *);
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extern int dwarf2dbg_relax_frag (fragS *);
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extern void dwarf2dbg_convert_frag (fragS *);
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extern void dwarf2dbg_final_check (void);
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/* An enumeration which describes the sizes of offsets (to DWARF sections)
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and the mechanism by which the size is indicated. */
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enum dwarf2_format
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{
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/* 32-bit format: the initial length field is 4 bytes long. */
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dwarf2_format_32bit,
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/* DWARF3 64-bit format: the representation of the initial length
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(of a DWARF section) is 0xffffffff (4 bytes) followed by eight
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bytes indicating the actual length. */
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dwarf2_format_64bit,
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/* SGI extension to DWARF2: The initial length is eight bytes. */
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dwarf2_format_64bit_irix
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};
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#endif /* AS_DWARF2DBG_H */
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