1/* dwarf2dbg.h - DWARF2 debug support 2 Copyright 1999, 2000, 2002, 2003, 2005, 2006, 2007, 2009 3 Free Software Foundation, Inc. 4 5 This file is part of GAS, the GNU Assembler. 6 7 GAS is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3, or (at your option) 10 any later version. 11 12 GAS is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GAS; see the file COPYING. If not, write to the Free 19 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 20 02110-1301, USA. */ 21 22#ifndef AS_DWARF2DBG_H 23#define AS_DWARF2DBG_H 24 25#include "as.h" 26 27#define DWARF2_FLAG_IS_STMT (1 << 0) 28#define DWARF2_FLAG_BASIC_BLOCK (1 << 1) 29#define DWARF2_FLAG_PROLOGUE_END (1 << 2) 30#define DWARF2_FLAG_EPILOGUE_BEGIN (1 << 3) 31 32struct dwarf2_line_info { 33 unsigned int filenum; 34 unsigned int line; 35 unsigned int column; 36 unsigned int isa; 37 unsigned int flags; 38 unsigned int discriminator; 39}; 40 41/* Implements the .file FILENO "FILENAME" directive. FILENO can be 0 42 to indicate that no file number has been assigned. All real file 43 number must be >0. */ 44extern char *dwarf2_directive_file (int dummy); 45 46/* Implements the .loc FILENO LINENO [COLUMN] directive. FILENO is 47 the file number, LINENO the line number and the (optional) COLUMN 48 the column of the source code that the following instruction 49 corresponds to. FILENO can be 0 to indicate that the filename 50 specified by the textually most recent .file directive should be 51 used. */ 52extern void dwarf2_directive_loc (int dummy); 53 54/* Implements the .loc_mark_labels {0,1} directive. */ 55extern void dwarf2_directive_loc_mark_labels (int dummy); 56 57/* Returns the current source information. If .file directives have 58 been encountered, the info for the corresponding source file is 59 returned. Otherwise, the info for the assembly source file is 60 returned. */ 61extern void dwarf2_where (struct dwarf2_line_info *l); 62 63/* A hook to allow the target backend to inform the line number state 64 machine of isa changes when assembler debug info is enabled. */ 65extern void dwarf2_set_isa (unsigned int isa); 66 67/* This function generates .debug_line info based on the address and 68 source information passed in the arguments. ADDR should be the 69 frag-relative offset of the instruction the information is for and 70 L is the source information that should be associated with that 71 address. */ 72extern void dwarf2_gen_line_info (addressT addr, struct dwarf2_line_info *l); 73 74/* Must be called for each generated instruction. */ 75extern void dwarf2_emit_insn (int); 76 77/* Reset the state of the line number information to reflect that 78 it has been used. */ 79extern void dwarf2_consume_line_info (void); 80 81/* Should be called for each code label. */ 82extern void dwarf2_emit_label (symbolS *); 83 84/* True when we've seen a .loc directive recently. Used to avoid 85 doing work when there's nothing to do. */ 86extern bfd_boolean dwarf2_loc_directive_seen; 87 88/* True when we're supposed to set the basic block mark whenever a label 89 is seen. Unless the target is doing Something Weird, just call 90 dwarf2_emit_label. */ 91extern bfd_boolean dwarf2_loc_mark_labels; 92 93extern void dwarf2_init (void); 94 95extern void dwarf2_finish (void); 96 97extern int dwarf2dbg_estimate_size_before_relax (fragS *); 98extern int dwarf2dbg_relax_frag (fragS *); 99extern void dwarf2dbg_convert_frag (fragS *); 100 101/* An enumeration which describes the sizes of offsets (to DWARF sections) 102 and the mechanism by which the size is indicated. */ 103enum dwarf2_format { 104 /* 32-bit format: the initial length field is 4 bytes long. */ 105 dwarf2_format_32bit, 106 /* DWARF3 64-bit format: the representation of the initial length 107 (of a DWARF section) is 0xffffffff (4 bytes) followed by eight 108 bytes indicating the actual length. */ 109 dwarf2_format_64bit, 110 /* SGI extension to DWARF2: The initial length is eight bytes. */ 111 dwarf2_format_64bit_irix 112}; 113 114#endif /* AS_DWARF2DBG_H */ 115