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/* dwarf2dbg.h - DWARF2 debug support
Copyright (C) 1999-2021 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
GAS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GAS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GAS; see the file COPYING. If not, write to the Free
Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
02110-1301, USA. */
#ifndef AS_DWARF2DBG_H
#define AS_DWARF2DBG_H
#include "as.h"
#define DWARF2_FLAG_IS_STMT (1 << 0)
#define DWARF2_FLAG_BASIC_BLOCK (1 << 1)
#define DWARF2_FLAG_PROLOGUE_END (1 << 2)
#define DWARF2_FLAG_EPILOGUE_BEGIN (1 << 3)
struct dwarf2_line_info
{
unsigned int filenum;
unsigned int line;
unsigned int column;
unsigned int isa;
unsigned int flags;
unsigned int discriminator;
/* filenum == -1u chooses filename, otherwise view. */
union
{
symbolS *view;
const char *filename;
} u;
};
/* Implements the .file FILENO "FILENAME" directive. FILENO can be 0
to indicate that no file number has been assigned. All real file
number must be >0. The second form returns the filename extracted
from the input stream. */
extern void dwarf2_directive_file (int);
extern char * dwarf2_directive_filename (void);
/* Implements the .loc FILENO LINENO [COLUMN] directive. FILENO is
the file number, LINENO the line number and the (optional) COLUMN
the column of the source code that the following instruction
corresponds to. FILENO can be 0 to indicate that the filename
specified by the textually most recent .file directive should be
used. */
extern void dwarf2_directive_loc (int);
/* Implements the .loc_mark_labels {0,1} directive. */
extern void dwarf2_directive_loc_mark_labels (int);
/* Returns the current source information. If .file directives have
been encountered, the info for the corresponding source file is
returned. Otherwise, the info for the assembly source file is
returned. */
extern void dwarf2_where (struct dwarf2_line_info *);
/* A hook to allow the target backend to inform the line number state
machine of isa changes when assembler debug info is enabled. */
extern void dwarf2_set_isa (unsigned int);
/* This function generates .debug_line info based on the address and
source information passed in the arguments. ADDR should be the
frag-relative offset of the instruction the information is for and
L is the source information that should be associated with that
address. */
extern void dwarf2_gen_line_info (addressT, struct dwarf2_line_info *);
/* Must be called for each generated instruction. */
extern void dwarf2_emit_insn (int);
void dwarf2_move_insn (int);
/* Reset the state of the line number information to reflect that
it has been used. */
extern void dwarf2_consume_line_info (void);
/* Should be called for each code label. */
extern void dwarf2_emit_label (symbolS *);
/* True when we've seen a .loc directive recently. Used to avoid
doing work when there's nothing to do. */
extern bool dwarf2_loc_directive_seen;
/* True when we're supposed to set the basic block mark whenever a label
is seen. Unless the target is doing Something Weird, just call
dwarf2_emit_label. */
extern bool dwarf2_loc_mark_labels;
extern void dwarf2_init (void);
extern void dwarf2_finish (void);
extern int dwarf2dbg_estimate_size_before_relax (fragS *);
extern int dwarf2dbg_relax_frag (fragS *);
extern void dwarf2dbg_convert_frag (fragS *);
extern void dwarf2dbg_final_check (void);
/* An enumeration which describes the sizes of offsets (to DWARF sections)
and the mechanism by which the size is indicated. */
enum dwarf2_format
{
/* 32-bit format: the initial length field is 4 bytes long. */
dwarf2_format_32bit,
/* DWARF3 64-bit format: the representation of the initial length
(of a DWARF section) is 0xffffffff (4 bytes) followed by eight
bytes indicating the actual length. */
dwarf2_format_64bit,
/* SGI extension to DWARF2: The initial length is eight bytes. */
dwarf2_format_64bit_irix
};
#endif /* AS_DWARF2DBG_H */
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