mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2025-01-06 12:09:26 +08:00
1d506c26d9
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
136 lines
3.1 KiB
C
136 lines
3.1 KiB
C
/* Low-level DWARF 2 reading code
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Copyright (C) 1994-2024 Free Software Foundation, Inc.
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Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
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Inc. with support from Florida State University (under contract
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with the Ada Joint Program Office), and Silicon Graphics, Inc.
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Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
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based on Fred Fish's (Cygnus Support) implementation of DWARF 1
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support.
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This file is part of GDB.
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This program 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 of the License, or
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(at your option) any later version.
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This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "dwarf2/leb.h"
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ULONGEST
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read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf,
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unsigned int *bytes_read_ptr)
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{
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ULONGEST result;
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unsigned int num_read;
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int shift;
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unsigned char byte;
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result = 0;
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shift = 0;
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num_read = 0;
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while (1)
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{
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byte = bfd_get_8 (abfd, buf);
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buf++;
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num_read++;
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result |= ((ULONGEST) (byte & 127) << shift);
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if ((byte & 128) == 0)
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{
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break;
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}
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shift += 7;
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}
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*bytes_read_ptr = num_read;
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return result;
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}
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LONGEST
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read_signed_leb128 (bfd *abfd, const gdb_byte *buf,
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unsigned int *bytes_read_ptr)
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{
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ULONGEST result;
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int shift, num_read;
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unsigned char byte;
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result = 0;
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shift = 0;
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num_read = 0;
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while (1)
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{
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byte = bfd_get_8 (abfd, buf);
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buf++;
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num_read++;
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result |= ((ULONGEST) (byte & 127) << shift);
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shift += 7;
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if ((byte & 128) == 0)
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{
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break;
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}
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}
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if ((shift < 8 * sizeof (result)) && (byte & 0x40))
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result |= -(((ULONGEST) 1) << shift);
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*bytes_read_ptr = num_read;
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return result;
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}
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/* See leb.h. */
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LONGEST
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read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read,
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bool handle_nonstd)
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{
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LONGEST length = bfd_get_32 (abfd, buf);
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if (length == 0xffffffff)
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{
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length = bfd_get_64 (abfd, buf + 4);
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*bytes_read = 12;
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}
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else if (handle_nonstd && length == 0)
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{
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/* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
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length = bfd_get_64 (abfd, buf);
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*bytes_read = 8;
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}
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else
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{
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*bytes_read = 4;
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}
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return length;
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}
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/* See leb.h. */
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LONGEST
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read_offset (bfd *abfd, const gdb_byte *buf, unsigned int offset_size)
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{
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LONGEST retval = 0;
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switch (offset_size)
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{
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case 4:
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retval = bfd_get_32 (abfd, buf);
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break;
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case 8:
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retval = bfd_get_64 (abfd, buf);
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break;
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default:
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internal_error (_("read_offset_1: bad switch [in module %s]"),
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bfd_get_filename (abfd));
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}
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return retval;
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}
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