1 /* dwarf2dbg.h - DWARF2 debug support 2 Copyright (C) 1999-2022 Free Software Foundation, Inc. 3 4 This file is part of GAS, the GNU Assembler. 5 6 GAS is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3, or (at your option) 9 any later version. 10 11 GAS is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GAS; see the file COPYING. If not, write to the Free 18 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 19 02110-1301, USA. */ 20 21 #ifndef AS_DWARF2DBG_H 22 #define AS_DWARF2DBG_H 23 24 #include "as.h" 25 26 #define DWARF2_FLAG_IS_STMT (1 << 0) 27 #define DWARF2_FLAG_BASIC_BLOCK (1 << 1) 28 #define DWARF2_FLAG_PROLOGUE_END (1 << 2) 29 #define DWARF2_FLAG_EPILOGUE_BEGIN (1 << 3) 30 31 struct dwarf2_line_info 32 { 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 /* filenum == -1u chooses filename, otherwise view. */ 40 union 41 { 42 symbolS *view; 43 const char *filename; 44 } u; 45 }; 46 47 /* Implements the .file FILENO "FILENAME" directive. FILENO can be 0 48 to indicate that no file number has been assigned. All real file 49 number must be >0. The second form returns the filename extracted 50 from the input stream. */ 51 extern void dwarf2_directive_file (int); 52 extern char * dwarf2_directive_filename (void); 53 54 /* Implements the .loc FILENO LINENO [COLUMN] directive. FILENO is 55 the file number, LINENO the line number and the (optional) COLUMN 56 the column of the source code that the following instruction 57 corresponds to. FILENO can be 0 to indicate that the filename 58 specified by the textually most recent .file directive should be 59 used. */ 60 extern void dwarf2_directive_loc (int); 61 62 /* Implements the .loc_mark_labels {0,1} directive. */ 63 extern void dwarf2_directive_loc_mark_labels (int); 64 65 /* Returns the current source information. If .file directives have 66 been encountered, the info for the corresponding source file is 67 returned. Otherwise, the info for the assembly source file is 68 returned. */ 69 extern void dwarf2_where (struct dwarf2_line_info *); 70 71 /* A hook to allow the target backend to inform the line number state 72 machine of isa changes when assembler debug info is enabled. */ 73 extern void dwarf2_set_isa (unsigned int); 74 75 /* This function generates .debug_line info based on the address and 76 source information passed in the arguments. ADDR should be the 77 frag-relative offset of the instruction the information is for and 78 L is the source information that should be associated with that 79 address. */ 80 extern void dwarf2_gen_line_info (addressT, struct dwarf2_line_info *); 81 82 /* Must be called for each generated instruction. */ 83 extern void dwarf2_emit_insn (int); 84 85 void dwarf2_move_insn (int); 86 87 /* Reset the state of the line number information to reflect that 88 it has been used. */ 89 extern void dwarf2_consume_line_info (void); 90 91 /* Should be called for each code label. */ 92 extern void dwarf2_emit_label (symbolS *); 93 94 /* True when we've seen a .loc directive recently. Used to avoid 95 doing work when there's nothing to do. */ 96 extern bool dwarf2_loc_directive_seen; 97 98 /* True when we're supposed to set the basic block mark whenever a label 99 is seen. Unless the target is doing Something Weird, just call 100 dwarf2_emit_label. */ 101 extern bool dwarf2_loc_mark_labels; 102 103 extern void dwarf2_init (void); 104 105 extern void dwarf2_finish (void); 106 107 extern int dwarf2dbg_estimate_size_before_relax (fragS *); 108 extern int dwarf2dbg_relax_frag (fragS *); 109 extern void dwarf2dbg_convert_frag (fragS *); 110 111 extern void dwarf2dbg_final_check (void); 112 113 /* An enumeration which describes the sizes of offsets (to DWARF sections) 114 and the mechanism by which the size is indicated. */ 115 enum dwarf2_format 116 { 117 /* 32-bit format: the initial length field is 4 bytes long. */ 118 dwarf2_format_32bit, 119 /* DWARF3 64-bit format: the representation of the initial length 120 (of a DWARF section) is 0xffffffff (4 bytes) followed by eight 121 bytes indicating the actual length. */ 122 dwarf2_format_64bit, 123 /* SGI extension to DWARF2: The initial length is eight bytes. */ 124 dwarf2_format_64bit_irix 125 }; 126 127 #endif /* AS_DWARF2DBG_H */ 128