gdb/dwarf2/leb.h

   1 /* Low-level DWARF 2 reading code
   2
   3    Copyright (C) 1994-2020 Free Software Foundation, Inc.
   4
   5    Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
   6    Inc.  with support from Florida State University (under contract
   7    with the Ada Joint Program Office), and Silicon Graphics, Inc.
   8    Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
   9    based on Fred Fish's (Cygnus Support) implementation of DWARF 1
  10    support.
  11
  12    This file is part of GDB.
  13
  14    This program is free software; you can redistribute it and/or modify
  15    it under the terms of the GNU General Public License as published by
  16    the Free Software Foundation; either version 3 of the License, or
  17    (at your option) any later version.
  18
  19    This program is distributed in the hope that it will be useful,
  20    but WITHOUT ANY WARRANTY; without even the implied warranty of
  21    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22    GNU General Public License for more details.
  23
  24    You should have received a copy of the GNU General Public License
  25    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  26
  27 #ifndef GDB_DWARF2_LEB_H
  28 #define GDB_DWARF2_LEB_H
  29
  30 /* Read dwarf information from a buffer.  */
  31
  32 static inline unsigned int
  33 read_1_byte (bfd *abfd, const gdb_byte *buf)
  34 {
  35   return bfd_get_8 (abfd, buf);
  36 }
  37
  38 static inline int
  39 read_1_signed_byte (bfd *abfd, const gdb_byte *buf)
  40 {
  41   return bfd_get_signed_8 (abfd, buf);
  42 }
  43
  44 static inline unsigned int
  45 read_2_bytes (bfd *abfd, const gdb_byte *buf)
  46 {
  47   return bfd_get_16 (abfd, buf);
  48 }
  49
  50 static inline int
  51 read_2_signed_bytes (bfd *abfd, const gdb_byte *buf)
  52 {
  53   return bfd_get_signed_16 (abfd, buf);
  54 }
  55
  56 /* Read the next three bytes (little-endian order) as an unsigned integer.  */
  57 static inline unsigned int
  58 read_3_bytes (bfd *abfd, const gdb_byte *buf)
  59 {
  60   unsigned int result = 0;
  61   for (int i = 0; i < 3; ++i)
  62     {
  63       unsigned char byte = bfd_get_8 (abfd, buf);
  64       buf++;
  65       result |= ((unsigned int) byte << (i * 8));
  66     }
  67   return result;
  68 }
  69
  70 static inline unsigned int
  71 read_4_bytes (bfd *abfd, const gdb_byte *buf)
  72 {
  73   return bfd_get_32 (abfd, buf);
  74 }
  75
  76 static inline int
  77 read_4_signed_bytes (bfd *abfd, const gdb_byte *buf)
  78 {
  79   return bfd_get_signed_32 (abfd, buf);
  80 }
  81
  82 static inline ULONGEST
  83 read_8_bytes (bfd *abfd, const gdb_byte *buf)
  84 {
  85   return bfd_get_64 (abfd, buf);
  86 }
  87
  88 extern LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *);
  89
  90 extern ULONGEST read_unsigned_leb128 (bfd *, const gdb_byte *, unsigned int *);
  91
  92 #endif /* GDB_DWARF2_LEB_H */