mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-09 04:21:49 +08:00
af92590521
In commitb86d3af60fand0ab0435fe6I fixed SIGBUS errors found by oss-fuzz now that --with-mmap defaults to enabled. It turns out there are further problems with the aout mmap code: aout_read_minisymbols returns the external symbol array, which is later freed by nm.c. If the array is mmaped you can't free it. Now this could be fixed by making aout minisymbols an array of pointers, but I figure there's not much point in expending effort on that. So delete the aout mmap support along with bfdwin.c and get_section_contents_in_window.
1539 lines
36 KiB
C
1539 lines
36 KiB
C
/* Assorted BFD support routines, only used internally.
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Copyright (C) 1990-2024 Free Software Foundation, Inc.
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Written by Cygnus Support.
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This file is part of BFD, the Binary File Descriptor library.
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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, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "elf-bfd.h"
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#include "libbfd.h"
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#include "objalloc.h"
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#ifndef HAVE_GETPAGESIZE
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#define getpagesize() 2048
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#endif
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/*
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SECTION
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Implementation details
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SUBSECTION
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Internal functions
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DESCRIPTION
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These routines are used within BFD.
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They are not intended for export, but are documented here for
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completeness.
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*/
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bool
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_bfd_bool_bfd_false (bfd *abfd ATTRIBUTE_UNUSED)
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{
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return false;
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}
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bool
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_bfd_bool_bfd_asymbol_false (bfd *abfd ATTRIBUTE_UNUSED,
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asymbol *sym ATTRIBUTE_UNUSED)
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{
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return false;
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}
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/* A routine which is used in target vectors for unsupported
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operations. */
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bool
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_bfd_bool_bfd_false_error (bfd *ignore ATTRIBUTE_UNUSED)
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{
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bfd_set_error (bfd_error_invalid_operation);
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return false;
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}
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bool
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_bfd_bool_bfd_link_false_error (bfd *abfd,
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struct bfd_link_info *info ATTRIBUTE_UNUSED)
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{
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return _bfd_bool_bfd_false_error (abfd);
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}
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/* A routine which is used in target vectors for supported operations
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which do not actually do anything. */
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bool
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_bfd_bool_bfd_true (bfd *ignore ATTRIBUTE_UNUSED)
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{
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return true;
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}
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bool
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_bfd_bool_bfd_link_true (bfd *abfd ATTRIBUTE_UNUSED,
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struct bfd_link_info *info ATTRIBUTE_UNUSED)
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{
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return true;
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}
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bool
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_bfd_bool_bfd_bfd_true (bfd *ibfd ATTRIBUTE_UNUSED,
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bfd *obfd ATTRIBUTE_UNUSED)
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{
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return true;
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}
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bool
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_bfd_bool_bfd_uint_true (bfd *abfd ATTRIBUTE_UNUSED,
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unsigned int flags ATTRIBUTE_UNUSED)
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{
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return true;
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}
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bool
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_bfd_bool_bfd_asection_bfd_asection_true (bfd *ibfd ATTRIBUTE_UNUSED,
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asection *isec ATTRIBUTE_UNUSED,
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bfd *obfd ATTRIBUTE_UNUSED,
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asection *osec ATTRIBUTE_UNUSED)
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{
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return true;
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}
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bool
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_bfd_bool_bfd_asymbol_bfd_asymbol_true (bfd *ibfd ATTRIBUTE_UNUSED,
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asymbol *isym ATTRIBUTE_UNUSED,
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bfd *obfd ATTRIBUTE_UNUSED,
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asymbol *osym ATTRIBUTE_UNUSED)
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{
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return true;
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}
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bool
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_bfd_bool_bfd_ptr_true (bfd *abfd ATTRIBUTE_UNUSED,
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void *ptr ATTRIBUTE_UNUSED)
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{
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return true;
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}
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/* A routine which is used in target vectors for unsupported
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operations which return a pointer value. */
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void *
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_bfd_ptr_bfd_null_error (bfd *ignore ATTRIBUTE_UNUSED)
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{
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bfd_set_error (bfd_error_invalid_operation);
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return NULL;
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}
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int
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_bfd_int_bfd_0 (bfd *ignore ATTRIBUTE_UNUSED)
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{
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return 0;
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}
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unsigned int
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_bfd_uint_bfd_0 (bfd *ignore ATTRIBUTE_UNUSED)
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{
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return 0;
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}
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long
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_bfd_long_bfd_0 (bfd *ignore ATTRIBUTE_UNUSED)
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{
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return 0;
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}
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/* A routine which is used in target vectors for unsupported
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operations which return -1 on error. */
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long
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_bfd_long_bfd_n1_error (bfd *ignore_abfd ATTRIBUTE_UNUSED)
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{
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bfd_set_error (bfd_error_invalid_operation);
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return -1;
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}
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void
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_bfd_void_bfd (bfd *ignore ATTRIBUTE_UNUSED)
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{
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}
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void
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_bfd_void_bfd_link (bfd *abfd ATTRIBUTE_UNUSED,
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struct bfd_link_info *info ATTRIBUTE_UNUSED)
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{
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}
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void
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_bfd_void_bfd_asection (bfd *abfd ATTRIBUTE_UNUSED,
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asection *sec ATTRIBUTE_UNUSED)
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{
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}
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long
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_bfd_norelocs_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
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asection *sec ATTRIBUTE_UNUSED)
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{
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return sizeof (arelent *);
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}
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long
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_bfd_norelocs_canonicalize_reloc (bfd *abfd ATTRIBUTE_UNUSED,
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asection *sec ATTRIBUTE_UNUSED,
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arelent **relptr,
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asymbol **symbols ATTRIBUTE_UNUSED)
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{
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*relptr = NULL;
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return 0;
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}
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void
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_bfd_norelocs_set_reloc (bfd *abfd ATTRIBUTE_UNUSED,
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asection *sec ATTRIBUTE_UNUSED,
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arelent **relptr ATTRIBUTE_UNUSED,
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unsigned int count ATTRIBUTE_UNUSED)
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{
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/* Do nothing. */
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}
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bool
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_bfd_nocore_core_file_matches_executable_p
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(bfd *ignore_core_bfd ATTRIBUTE_UNUSED,
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bfd *ignore_exec_bfd ATTRIBUTE_UNUSED)
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{
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bfd_set_error (bfd_error_invalid_operation);
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return false;
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}
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/* Routine to handle core_file_failing_command entry point for targets
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without core file support. */
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char *
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_bfd_nocore_core_file_failing_command (bfd *ignore_abfd ATTRIBUTE_UNUSED)
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{
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bfd_set_error (bfd_error_invalid_operation);
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return NULL;
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}
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/* Routine to handle core_file_failing_signal entry point for targets
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without core file support. */
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int
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_bfd_nocore_core_file_failing_signal (bfd *ignore_abfd ATTRIBUTE_UNUSED)
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{
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bfd_set_error (bfd_error_invalid_operation);
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return 0;
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}
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/* Routine to handle the core_file_pid entry point for targets without
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core file support. */
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int
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_bfd_nocore_core_file_pid (bfd *ignore_abfd ATTRIBUTE_UNUSED)
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{
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bfd_set_error (bfd_error_invalid_operation);
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return 0;
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}
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bfd_cleanup
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_bfd_dummy_target (bfd *ignore_abfd ATTRIBUTE_UNUSED)
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{
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bfd_set_error (bfd_error_wrong_format);
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return 0;
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}
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/* Allocate memory using malloc. */
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#ifndef SSIZE_MAX
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#define SSIZE_MAX ((size_t) -1 >> 1)
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#endif
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/*
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INTERNAL_FUNCTION
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bfd_malloc
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SYNOPSIS
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void *bfd_malloc (bfd_size_type {*size*});
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DESCRIPTION
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Returns a pointer to an allocated block of memory that is at least
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SIZE bytes long. If SIZE is 0 then it will be treated as if it were
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1. If SIZE is too big then NULL will be returned.
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Returns NULL upon error and sets bfd_error.
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*/
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void *
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bfd_malloc (bfd_size_type size)
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{
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void *ptr;
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size_t sz = (size_t) size;
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if (size != sz
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/* This is to pacify memory checkers like valgrind. */
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|| sz > SSIZE_MAX)
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{
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bfd_set_error (bfd_error_no_memory);
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return NULL;
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}
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ptr = malloc (sz ? sz : 1);
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if (ptr == NULL)
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bfd_set_error (bfd_error_no_memory);
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return ptr;
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}
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/*
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INTERNAL_FUNCTION
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bfd_realloc
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SYNOPSIS
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void *bfd_realloc (void *{*mem*}, bfd_size_type {*size*});
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DESCRIPTION
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Returns a pointer to an allocated block of memory that is at least
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SIZE bytes long. If SIZE is 0 then it will be treated as if it were
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1. If SIZE is too big then NULL will be returned.
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If MEM is not NULL then it must point to an allocated block of memory.
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If this block is large enough then MEM may be used as the return
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value for this function, but this is not guaranteed.
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If MEM is not returned then the first N bytes in the returned block
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will be identical to the first N bytes in region pointed to by MEM,
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where N is the lessor of SIZE and the length of the region of memory
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currently addressed by MEM.
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Returns NULL upon error and sets bfd_error.
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*/
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void *
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bfd_realloc (void *ptr, bfd_size_type size)
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{
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void *ret;
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size_t sz = (size_t) size;
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if (ptr == NULL)
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return bfd_malloc (size);
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if (size != sz
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/* This is to pacify memory checkers like valgrind. */
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|| sz > SSIZE_MAX)
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{
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bfd_set_error (bfd_error_no_memory);
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return NULL;
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}
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/* The behaviour of realloc(0) is implementation defined,
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but for this function we always allocate memory. */
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ret = realloc (ptr, sz ? sz : 1);
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if (ret == NULL)
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bfd_set_error (bfd_error_no_memory);
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return ret;
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}
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/*
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INTERNAL_FUNCTION
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bfd_realloc_or_free
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SYNOPSIS
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void *bfd_realloc_or_free (void *{*mem*}, bfd_size_type {*size*});
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DESCRIPTION
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Returns a pointer to an allocated block of memory that is at least
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SIZE bytes long. If SIZE is 0 then no memory will be allocated,
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MEM will be freed, and NULL will be returned. This will not cause
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bfd_error to be set.
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If SIZE is too big then NULL will be returned and bfd_error will be
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set.
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If MEM is not NULL then it must point to an allocated block of memory.
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If this block is large enough then MEM may be used as the return
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value for this function, but this is not guaranteed.
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If MEM is not returned then the first N bytes in the returned block
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will be identical to the first N bytes in region pointed to by MEM,
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where N is the lessor of SIZE and the length of the region of memory
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currently addressed by MEM.
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*/
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void *
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bfd_realloc_or_free (void *ptr, bfd_size_type size)
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{
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void *ret;
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/* The behaviour of realloc(0) is implementation defined, but
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for this function we treat it is always freeing the memory. */
|
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if (size == 0)
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{
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free (ptr);
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return NULL;
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}
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ret = bfd_realloc (ptr, size);
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if (ret == NULL)
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free (ptr);
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return ret;
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}
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/*
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INTERNAL_FUNCTION
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bfd_zmalloc
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SYNOPSIS
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void *bfd_zmalloc (bfd_size_type {*size*});
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DESCRIPTION
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Returns a pointer to an allocated block of memory that is at least
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SIZE bytes long. If SIZE is 0 then it will be treated as if it were
|
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1. If SIZE is too big then NULL will be returned.
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Returns NULL upon error and sets bfd_error.
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If NULL is not returned then the allocated block of memory will
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have been cleared.
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*/
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void *
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bfd_zmalloc (bfd_size_type size)
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{
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void *ptr = bfd_malloc (size);
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if (ptr != NULL)
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memset (ptr, 0, size ? (size_t) size : 1);
|
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return ptr;
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}
|
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|
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/*
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FUNCTION
|
||
bfd_alloc
|
||
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SYNOPSIS
|
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void *bfd_alloc (bfd *abfd, bfd_size_type wanted);
|
||
|
||
DESCRIPTION
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Allocate a block of @var{wanted} bytes of memory attached to
|
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<<abfd>> and return a pointer to it.
|
||
*/
|
||
|
||
void *
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||
bfd_alloc (bfd *abfd, bfd_size_type size)
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{
|
||
void *ret;
|
||
unsigned long ul_size = (unsigned long) size;
|
||
|
||
if (size != ul_size
|
||
/* Note - although objalloc_alloc takes an unsigned long as its
|
||
argument, internally the size is treated as a signed long. This can
|
||
lead to problems where, for example, a request to allocate -1 bytes
|
||
can result in just 1 byte being allocated, rather than
|
||
((unsigned long) -1) bytes. Also memory checkers will often
|
||
complain about attempts to allocate a negative amount of memory.
|
||
So to stop these problems we fail if the size is negative. */
|
||
|| ((signed long) ul_size) < 0)
|
||
{
|
||
bfd_set_error (bfd_error_no_memory);
|
||
return NULL;
|
||
}
|
||
|
||
ret = objalloc_alloc ((struct objalloc *) abfd->memory, ul_size);
|
||
if (ret == NULL)
|
||
bfd_set_error (bfd_error_no_memory);
|
||
else
|
||
abfd->alloc_size += size;
|
||
return ret;
|
||
}
|
||
|
||
/*
|
||
FUNCTION
|
||
bfd_zalloc
|
||
|
||
SYNOPSIS
|
||
void *bfd_zalloc (bfd *abfd, bfd_size_type wanted);
|
||
|
||
DESCRIPTION
|
||
Allocate a block of @var{wanted} bytes of zeroed memory
|
||
attached to <<abfd>> and return a pointer to it.
|
||
*/
|
||
|
||
void *
|
||
bfd_zalloc (bfd *abfd, bfd_size_type size)
|
||
{
|
||
void *res;
|
||
|
||
res = bfd_alloc (abfd, size);
|
||
if (res)
|
||
memset (res, 0, (size_t) size);
|
||
return res;
|
||
}
|
||
|
||
/*
|
||
FUNCTION
|
||
bfd_release
|
||
|
||
SYNOPSIS
|
||
void bfd_release (bfd *, void *);
|
||
|
||
DESCRIPTION
|
||
Free a block allocated for a BFD.
|
||
Note: Also frees all more recently allocated blocks!
|
||
*/
|
||
|
||
void
|
||
bfd_release (bfd *abfd, void *block)
|
||
{
|
||
objalloc_free_block ((struct objalloc *) abfd->memory, block);
|
||
}
|
||
|
||
/*
|
||
INTERNAL_FUNCTION
|
||
bfd_write_bigendian_4byte_int
|
||
|
||
SYNOPSIS
|
||
bool bfd_write_bigendian_4byte_int (bfd *, unsigned int);
|
||
|
||
DESCRIPTION
|
||
Write a 4 byte integer @var{i} to the output BFD @var{abfd}, in big
|
||
endian order regardless of what else is going on. This is useful in
|
||
archives.
|
||
|
||
*/
|
||
bool
|
||
bfd_write_bigendian_4byte_int (bfd *abfd, unsigned int i)
|
||
{
|
||
bfd_byte buffer[4];
|
||
bfd_putb32 (i, buffer);
|
||
return bfd_write (buffer, 4, abfd) == 4;
|
||
}
|
||
|
||
|
||
/** The do-it-yourself (byte) sex-change kit */
|
||
|
||
/* The middle letter e.g. get<b>short indicates Big or Little endian
|
||
target machine. It doesn't matter what the byte order of the host
|
||
machine is; these routines work for either. */
|
||
|
||
/* FIXME: Should these take a count argument?
|
||
Answer (gnu@cygnus.com): No, but perhaps they should be inline
|
||
functions in swap.h #ifdef __GNUC__.
|
||
Gprof them later and find out. */
|
||
|
||
/*
|
||
FUNCTION
|
||
bfd_put_size
|
||
FUNCTION
|
||
bfd_get_size
|
||
|
||
DESCRIPTION
|
||
These macros as used for reading and writing raw data in
|
||
sections; each access (except for bytes) is vectored through
|
||
the target format of the BFD and mangled accordingly. The
|
||
mangling performs any necessary endian translations and
|
||
removes alignment restrictions. Note that types accepted and
|
||
returned by these macros are identical so they can be swapped
|
||
around in macros---for example, @file{libaout.h} defines <<GET_WORD>>
|
||
to either <<bfd_get_32>> or <<bfd_get_64>>.
|
||
|
||
In the put routines, @var{val} must be a <<bfd_vma>>. If we are on a
|
||
system without prototypes, the caller is responsible for making
|
||
sure that is true, with a cast if necessary. We don't cast
|
||
them in the macro definitions because that would prevent <<lint>>
|
||
or <<gcc -Wall>> from detecting sins such as passing a pointer.
|
||
To detect calling these with less than a <<bfd_vma>>, use
|
||
<<gcc -Wconversion>> on a host with 64 bit <<bfd_vma>>'s.
|
||
|
||
.
|
||
.{* Byte swapping macros for user section data. *}
|
||
.
|
||
.#define bfd_put_8(abfd, val, ptr) \
|
||
. ((void) (*((bfd_byte *) (ptr)) = (val) & 0xff))
|
||
.#define bfd_put_signed_8 \
|
||
. bfd_put_8
|
||
.#define bfd_get_8(abfd, ptr) \
|
||
. ((bfd_vma) *(const bfd_byte *) (ptr) & 0xff)
|
||
.#define bfd_get_signed_8(abfd, ptr) \
|
||
. ((((bfd_signed_vma) *(const bfd_byte *) (ptr) & 0xff) ^ 0x80) - 0x80)
|
||
.
|
||
.#define bfd_put_16(abfd, val, ptr) \
|
||
. BFD_SEND (abfd, bfd_putx16, ((val),(ptr)))
|
||
.#define bfd_put_signed_16 \
|
||
. bfd_put_16
|
||
.#define bfd_get_16(abfd, ptr) \
|
||
. BFD_SEND (abfd, bfd_getx16, (ptr))
|
||
.#define bfd_get_signed_16(abfd, ptr) \
|
||
. BFD_SEND (abfd, bfd_getx_signed_16, (ptr))
|
||
.
|
||
.#define bfd_put_24(abfd, val, ptr) \
|
||
. do \
|
||
. if (bfd_big_endian (abfd)) \
|
||
. bfd_putb24 ((val), (ptr)); \
|
||
. else \
|
||
. bfd_putl24 ((val), (ptr)); \
|
||
. while (0)
|
||
.
|
||
.bfd_vma bfd_getb24 (const void *p);
|
||
.bfd_vma bfd_getl24 (const void *p);
|
||
.
|
||
.#define bfd_get_24(abfd, ptr) \
|
||
. (bfd_big_endian (abfd) ? bfd_getb24 (ptr) : bfd_getl24 (ptr))
|
||
.
|
||
.#define bfd_put_32(abfd, val, ptr) \
|
||
. BFD_SEND (abfd, bfd_putx32, ((val),(ptr)))
|
||
.#define bfd_put_signed_32 \
|
||
. bfd_put_32
|
||
.#define bfd_get_32(abfd, ptr) \
|
||
. BFD_SEND (abfd, bfd_getx32, (ptr))
|
||
.#define bfd_get_signed_32(abfd, ptr) \
|
||
. BFD_SEND (abfd, bfd_getx_signed_32, (ptr))
|
||
.
|
||
.#define bfd_put_64(abfd, val, ptr) \
|
||
. BFD_SEND (abfd, bfd_putx64, ((val), (ptr)))
|
||
.#define bfd_put_signed_64 \
|
||
. bfd_put_64
|
||
.#define bfd_get_64(abfd, ptr) \
|
||
. BFD_SEND (abfd, bfd_getx64, (ptr))
|
||
.#define bfd_get_signed_64(abfd, ptr) \
|
||
. BFD_SEND (abfd, bfd_getx_signed_64, (ptr))
|
||
.
|
||
.#define bfd_get(bits, abfd, ptr) \
|
||
. ((bits) == 8 ? bfd_get_8 (abfd, ptr) \
|
||
. : (bits) == 16 ? bfd_get_16 (abfd, ptr) \
|
||
. : (bits) == 32 ? bfd_get_32 (abfd, ptr) \
|
||
. : (bits) == 64 ? bfd_get_64 (abfd, ptr) \
|
||
. : (abort (), (bfd_vma) - 1))
|
||
.
|
||
.#define bfd_put(bits, abfd, val, ptr) \
|
||
. ((bits) == 8 ? bfd_put_8 (abfd, val, ptr) \
|
||
. : (bits) == 16 ? bfd_put_16 (abfd, val, ptr) \
|
||
. : (bits) == 32 ? bfd_put_32 (abfd, val, ptr) \
|
||
. : (bits) == 64 ? bfd_put_64 (abfd, val, ptr) \
|
||
. : (abort (), (void) 0))
|
||
.
|
||
*/
|
||
|
||
/*
|
||
FUNCTION
|
||
bfd_h_put_size
|
||
bfd_h_get_size
|
||
|
||
DESCRIPTION
|
||
These macros have the same function as their <<bfd_get_x>>
|
||
brethren, except that they are used for removing information
|
||
for the header records of object files. Believe it or not,
|
||
some object files keep their header records in big endian
|
||
order and their data in little endian order.
|
||
.
|
||
.{* Byte swapping macros for file header data. *}
|
||
.
|
||
.#define bfd_h_put_8(abfd, val, ptr) \
|
||
. bfd_put_8 (abfd, val, ptr)
|
||
.#define bfd_h_put_signed_8(abfd, val, ptr) \
|
||
. bfd_put_8 (abfd, val, ptr)
|
||
.#define bfd_h_get_8(abfd, ptr) \
|
||
. bfd_get_8 (abfd, ptr)
|
||
.#define bfd_h_get_signed_8(abfd, ptr) \
|
||
. bfd_get_signed_8 (abfd, ptr)
|
||
.
|
||
.#define bfd_h_put_16(abfd, val, ptr) \
|
||
. BFD_SEND (abfd, bfd_h_putx16, (val, ptr))
|
||
.#define bfd_h_put_signed_16 \
|
||
. bfd_h_put_16
|
||
.#define bfd_h_get_16(abfd, ptr) \
|
||
. BFD_SEND (abfd, bfd_h_getx16, (ptr))
|
||
.#define bfd_h_get_signed_16(abfd, ptr) \
|
||
. BFD_SEND (abfd, bfd_h_getx_signed_16, (ptr))
|
||
.
|
||
.#define bfd_h_put_32(abfd, val, ptr) \
|
||
. BFD_SEND (abfd, bfd_h_putx32, (val, ptr))
|
||
.#define bfd_h_put_signed_32 \
|
||
. bfd_h_put_32
|
||
.#define bfd_h_get_32(abfd, ptr) \
|
||
. BFD_SEND (abfd, bfd_h_getx32, (ptr))
|
||
.#define bfd_h_get_signed_32(abfd, ptr) \
|
||
. BFD_SEND (abfd, bfd_h_getx_signed_32, (ptr))
|
||
.
|
||
.#define bfd_h_put_64(abfd, val, ptr) \
|
||
. BFD_SEND (abfd, bfd_h_putx64, (val, ptr))
|
||
.#define bfd_h_put_signed_64 \
|
||
. bfd_h_put_64
|
||
.#define bfd_h_get_64(abfd, ptr) \
|
||
. BFD_SEND (abfd, bfd_h_getx64, (ptr))
|
||
.#define bfd_h_get_signed_64(abfd, ptr) \
|
||
. BFD_SEND (abfd, bfd_h_getx_signed_64, (ptr))
|
||
.
|
||
.{* Aliases for the above, which should eventually go away. *}
|
||
.
|
||
.#define H_PUT_64 bfd_h_put_64
|
||
.#define H_PUT_32 bfd_h_put_32
|
||
.#define H_PUT_16 bfd_h_put_16
|
||
.#define H_PUT_8 bfd_h_put_8
|
||
.#define H_PUT_S64 bfd_h_put_signed_64
|
||
.#define H_PUT_S32 bfd_h_put_signed_32
|
||
.#define H_PUT_S16 bfd_h_put_signed_16
|
||
.#define H_PUT_S8 bfd_h_put_signed_8
|
||
.#define H_GET_64 bfd_h_get_64
|
||
.#define H_GET_32 bfd_h_get_32
|
||
.#define H_GET_16 bfd_h_get_16
|
||
.#define H_GET_8 bfd_h_get_8
|
||
.#define H_GET_S64 bfd_h_get_signed_64
|
||
.#define H_GET_S32 bfd_h_get_signed_32
|
||
.#define H_GET_S16 bfd_h_get_signed_16
|
||
.#define H_GET_S8 bfd_h_get_signed_8
|
||
.
|
||
.*/
|
||
|
||
/* Sign extension to bfd_signed_vma. */
|
||
#define COERCE16(x) (((bfd_vma) (x) ^ 0x8000) - 0x8000)
|
||
#define COERCE32(x) (((bfd_vma) (x) ^ 0x80000000) - 0x80000000)
|
||
#define COERCE64(x) \
|
||
(((uint64_t) (x) ^ ((uint64_t) 1 << 63)) - ((uint64_t) 1 << 63))
|
||
|
||
/*
|
||
FUNCTION
|
||
Byte swapping routines.
|
||
|
||
SYNOPSIS
|
||
uint64_t bfd_getb64 (const void *);
|
||
uint64_t bfd_getl64 (const void *);
|
||
int64_t bfd_getb_signed_64 (const void *);
|
||
int64_t bfd_getl_signed_64 (const void *);
|
||
bfd_vma bfd_getb32 (const void *);
|
||
bfd_vma bfd_getl32 (const void *);
|
||
bfd_signed_vma bfd_getb_signed_32 (const void *);
|
||
bfd_signed_vma bfd_getl_signed_32 (const void *);
|
||
bfd_vma bfd_getb16 (const void *);
|
||
bfd_vma bfd_getl16 (const void *);
|
||
bfd_signed_vma bfd_getb_signed_16 (const void *);
|
||
bfd_signed_vma bfd_getl_signed_16 (const void *);
|
||
void bfd_putb64 (uint64_t, void *);
|
||
void bfd_putl64 (uint64_t, void *);
|
||
void bfd_putb32 (bfd_vma, void *);
|
||
void bfd_putl32 (bfd_vma, void *);
|
||
void bfd_putb24 (bfd_vma, void *);
|
||
void bfd_putl24 (bfd_vma, void *);
|
||
void bfd_putb16 (bfd_vma, void *);
|
||
void bfd_putl16 (bfd_vma, void *);
|
||
uint64_t bfd_get_bits (const void *, int, bool);
|
||
void bfd_put_bits (uint64_t, void *, int, bool);
|
||
|
||
DESCRIPTION
|
||
Read and write integers in a particular endian order. getb
|
||
and putb functions handle big-endian, getl and putl handle
|
||
little-endian. bfd_get_bits and bfd_put_bits specify
|
||
big-endian by passing TRUE in the last parameter,
|
||
little-endian by passing FALSE.
|
||
*/
|
||
|
||
bfd_vma
|
||
bfd_getb16 (const void *p)
|
||
{
|
||
const bfd_byte *addr = (const bfd_byte *) p;
|
||
return (addr[0] << 8) | addr[1];
|
||
}
|
||
|
||
bfd_vma
|
||
bfd_getl16 (const void *p)
|
||
{
|
||
const bfd_byte *addr = (const bfd_byte *) p;
|
||
return (addr[1] << 8) | addr[0];
|
||
}
|
||
|
||
bfd_signed_vma
|
||
bfd_getb_signed_16 (const void *p)
|
||
{
|
||
const bfd_byte *addr = (const bfd_byte *) p;
|
||
return COERCE16 ((addr[0] << 8) | addr[1]);
|
||
}
|
||
|
||
bfd_signed_vma
|
||
bfd_getl_signed_16 (const void *p)
|
||
{
|
||
const bfd_byte *addr = (const bfd_byte *) p;
|
||
return COERCE16 ((addr[1] << 8) | addr[0]);
|
||
}
|
||
|
||
void
|
||
bfd_putb16 (bfd_vma data, void *p)
|
||
{
|
||
bfd_byte *addr = (bfd_byte *) p;
|
||
addr[0] = (data >> 8) & 0xff;
|
||
addr[1] = data & 0xff;
|
||
}
|
||
|
||
void
|
||
bfd_putl16 (bfd_vma data, void *p)
|
||
{
|
||
bfd_byte *addr = (bfd_byte *) p;
|
||
addr[0] = data & 0xff;
|
||
addr[1] = (data >> 8) & 0xff;
|
||
}
|
||
|
||
void
|
||
bfd_putb24 (bfd_vma data, void *p)
|
||
{
|
||
bfd_byte *addr = (bfd_byte *) p;
|
||
addr[0] = (data >> 16) & 0xff;
|
||
addr[1] = (data >> 8) & 0xff;
|
||
addr[2] = data & 0xff;
|
||
}
|
||
|
||
void
|
||
bfd_putl24 (bfd_vma data, void *p)
|
||
{
|
||
bfd_byte *addr = (bfd_byte *) p;
|
||
addr[0] = data & 0xff;
|
||
addr[1] = (data >> 8) & 0xff;
|
||
addr[2] = (data >> 16) & 0xff;
|
||
}
|
||
|
||
bfd_vma
|
||
bfd_getb24 (const void *p)
|
||
{
|
||
const bfd_byte *addr = (const bfd_byte *) p;
|
||
uint32_t v;
|
||
|
||
v = (uint32_t) addr[0] << 16;
|
||
v |= (uint32_t) addr[1] << 8;
|
||
v |= (uint32_t) addr[2];
|
||
return v;
|
||
}
|
||
|
||
bfd_vma
|
||
bfd_getl24 (const void *p)
|
||
{
|
||
const bfd_byte *addr = (const bfd_byte *) p;
|
||
uint32_t v;
|
||
|
||
v = (uint32_t) addr[0];
|
||
v |= (uint32_t) addr[1] << 8;
|
||
v |= (uint32_t) addr[2] << 16;
|
||
return v;
|
||
}
|
||
|
||
bfd_vma
|
||
bfd_getb32 (const void *p)
|
||
{
|
||
const bfd_byte *addr = (const bfd_byte *) p;
|
||
uint32_t v;
|
||
|
||
v = (uint32_t) addr[0] << 24;
|
||
v |= (uint32_t) addr[1] << 16;
|
||
v |= (uint32_t) addr[2] << 8;
|
||
v |= (uint32_t) addr[3];
|
||
return v;
|
||
}
|
||
|
||
bfd_vma
|
||
bfd_getl32 (const void *p)
|
||
{
|
||
const bfd_byte *addr = (const bfd_byte *) p;
|
||
uint32_t v;
|
||
|
||
v = (uint32_t) addr[0];
|
||
v |= (uint32_t) addr[1] << 8;
|
||
v |= (uint32_t) addr[2] << 16;
|
||
v |= (uint32_t) addr[3] << 24;
|
||
return v;
|
||
}
|
||
|
||
bfd_signed_vma
|
||
bfd_getb_signed_32 (const void *p)
|
||
{
|
||
const bfd_byte *addr = (const bfd_byte *) p;
|
||
uint32_t v;
|
||
|
||
v = (uint32_t) addr[0] << 24;
|
||
v |= (uint32_t) addr[1] << 16;
|
||
v |= (uint32_t) addr[2] << 8;
|
||
v |= (uint32_t) addr[3];
|
||
return COERCE32 (v);
|
||
}
|
||
|
||
bfd_signed_vma
|
||
bfd_getl_signed_32 (const void *p)
|
||
{
|
||
const bfd_byte *addr = (const bfd_byte *) p;
|
||
uint32_t v;
|
||
|
||
v = (uint32_t) addr[0];
|
||
v |= (uint32_t) addr[1] << 8;
|
||
v |= (uint32_t) addr[2] << 16;
|
||
v |= (uint32_t) addr[3] << 24;
|
||
return COERCE32 (v);
|
||
}
|
||
|
||
uint64_t
|
||
bfd_getb64 (const void *p)
|
||
{
|
||
const bfd_byte *addr = (const bfd_byte *) p;
|
||
uint64_t v;
|
||
|
||
v = addr[0]; v <<= 8;
|
||
v |= addr[1]; v <<= 8;
|
||
v |= addr[2]; v <<= 8;
|
||
v |= addr[3]; v <<= 8;
|
||
v |= addr[4]; v <<= 8;
|
||
v |= addr[5]; v <<= 8;
|
||
v |= addr[6]; v <<= 8;
|
||
v |= addr[7];
|
||
|
||
return v;
|
||
}
|
||
|
||
uint64_t
|
||
bfd_getl64 (const void *p)
|
||
{
|
||
const bfd_byte *addr = (const bfd_byte *) p;
|
||
uint64_t v;
|
||
|
||
v = addr[7]; v <<= 8;
|
||
v |= addr[6]; v <<= 8;
|
||
v |= addr[5]; v <<= 8;
|
||
v |= addr[4]; v <<= 8;
|
||
v |= addr[3]; v <<= 8;
|
||
v |= addr[2]; v <<= 8;
|
||
v |= addr[1]; v <<= 8;
|
||
v |= addr[0];
|
||
|
||
return v;
|
||
}
|
||
|
||
int64_t
|
||
bfd_getb_signed_64 (const void *p)
|
||
{
|
||
const bfd_byte *addr = (const bfd_byte *) p;
|
||
uint64_t v;
|
||
|
||
v = addr[0]; v <<= 8;
|
||
v |= addr[1]; v <<= 8;
|
||
v |= addr[2]; v <<= 8;
|
||
v |= addr[3]; v <<= 8;
|
||
v |= addr[4]; v <<= 8;
|
||
v |= addr[5]; v <<= 8;
|
||
v |= addr[6]; v <<= 8;
|
||
v |= addr[7];
|
||
|
||
return COERCE64 (v);
|
||
}
|
||
|
||
int64_t
|
||
bfd_getl_signed_64 (const void *p)
|
||
{
|
||
const bfd_byte *addr = (const bfd_byte *) p;
|
||
uint64_t v;
|
||
|
||
v = addr[7]; v <<= 8;
|
||
v |= addr[6]; v <<= 8;
|
||
v |= addr[5]; v <<= 8;
|
||
v |= addr[4]; v <<= 8;
|
||
v |= addr[3]; v <<= 8;
|
||
v |= addr[2]; v <<= 8;
|
||
v |= addr[1]; v <<= 8;
|
||
v |= addr[0];
|
||
|
||
return COERCE64 (v);
|
||
}
|
||
|
||
void
|
||
bfd_putb32 (bfd_vma data, void *p)
|
||
{
|
||
bfd_byte *addr = (bfd_byte *) p;
|
||
addr[0] = (data >> 24) & 0xff;
|
||
addr[1] = (data >> 16) & 0xff;
|
||
addr[2] = (data >> 8) & 0xff;
|
||
addr[3] = data & 0xff;
|
||
}
|
||
|
||
void
|
||
bfd_putl32 (bfd_vma data, void *p)
|
||
{
|
||
bfd_byte *addr = (bfd_byte *) p;
|
||
addr[0] = data & 0xff;
|
||
addr[1] = (data >> 8) & 0xff;
|
||
addr[2] = (data >> 16) & 0xff;
|
||
addr[3] = (data >> 24) & 0xff;
|
||
}
|
||
|
||
void
|
||
bfd_putb64 (uint64_t data, void *p)
|
||
{
|
||
bfd_byte *addr = (bfd_byte *) p;
|
||
addr[0] = (data >> (7*8)) & 0xff;
|
||
addr[1] = (data >> (6*8)) & 0xff;
|
||
addr[2] = (data >> (5*8)) & 0xff;
|
||
addr[3] = (data >> (4*8)) & 0xff;
|
||
addr[4] = (data >> (3*8)) & 0xff;
|
||
addr[5] = (data >> (2*8)) & 0xff;
|
||
addr[6] = (data >> (1*8)) & 0xff;
|
||
addr[7] = (data >> (0*8)) & 0xff;
|
||
}
|
||
|
||
void
|
||
bfd_putl64 (uint64_t data, void *p)
|
||
{
|
||
bfd_byte *addr = (bfd_byte *) p;
|
||
addr[7] = (data >> (7*8)) & 0xff;
|
||
addr[6] = (data >> (6*8)) & 0xff;
|
||
addr[5] = (data >> (5*8)) & 0xff;
|
||
addr[4] = (data >> (4*8)) & 0xff;
|
||
addr[3] = (data >> (3*8)) & 0xff;
|
||
addr[2] = (data >> (2*8)) & 0xff;
|
||
addr[1] = (data >> (1*8)) & 0xff;
|
||
addr[0] = (data >> (0*8)) & 0xff;
|
||
}
|
||
|
||
void
|
||
bfd_put_bits (uint64_t data, void *p, int bits, bool big_p)
|
||
{
|
||
bfd_byte *addr = (bfd_byte *) p;
|
||
int i;
|
||
int bytes;
|
||
|
||
if (bits % 8 != 0)
|
||
abort ();
|
||
|
||
bytes = bits / 8;
|
||
for (i = 0; i < bytes; i++)
|
||
{
|
||
int addr_index = big_p ? bytes - i - 1 : i;
|
||
|
||
addr[addr_index] = data & 0xff;
|
||
data >>= 8;
|
||
}
|
||
}
|
||
|
||
uint64_t
|
||
bfd_get_bits (const void *p, int bits, bool big_p)
|
||
{
|
||
const bfd_byte *addr = (const bfd_byte *) p;
|
||
uint64_t data;
|
||
int i;
|
||
int bytes;
|
||
|
||
if (bits % 8 != 0)
|
||
abort ();
|
||
|
||
data = 0;
|
||
bytes = bits / 8;
|
||
for (i = 0; i < bytes; i++)
|
||
{
|
||
int addr_index = big_p ? i : bytes - i - 1;
|
||
|
||
data = (data << 8) | addr[addr_index];
|
||
}
|
||
|
||
return data;
|
||
}
|
||
|
||
#ifdef USE_MMAP
|
||
/* Allocate a page to track mmapped memory and return the page and
|
||
the first entry. Return NULL if mmap fails. */
|
||
|
||
static struct bfd_mmapped *
|
||
bfd_allocate_mmapped_page (bfd *abfd, struct bfd_mmapped_entry **entry)
|
||
{
|
||
struct bfd_mmapped * mmapped
|
||
= (struct bfd_mmapped *) mmap (NULL, _bfd_pagesize,
|
||
PROT_READ | PROT_WRITE,
|
||
MAP_PRIVATE | MAP_ANONYMOUS,
|
||
-1, 0);
|
||
if (mmapped == MAP_FAILED)
|
||
return NULL;
|
||
|
||
mmapped->next = abfd->mmapped;
|
||
mmapped->max_entry
|
||
= ((_bfd_pagesize - offsetof (struct bfd_mmapped, entries))
|
||
/ sizeof (struct bfd_mmapped_entry));
|
||
mmapped->next_entry = 1;
|
||
abfd->mmapped = mmapped;
|
||
*entry = mmapped->entries;
|
||
return mmapped;
|
||
}
|
||
|
||
/* Mmap a memory region of RSIZE bytes with PROT at the current offset.
|
||
Return mmap address and size in MAP_ADDR and MAP_SIZE. Return NULL
|
||
on invalid input and MAP_FAILED for mmap failure. */
|
||
|
||
static void *
|
||
bfd_mmap_local (bfd *abfd, size_t rsize, int prot, void **map_addr,
|
||
size_t *map_size)
|
||
{
|
||
ufile_ptr filesize = bfd_get_file_size (abfd);
|
||
ufile_ptr offset = bfd_tell (abfd);
|
||
if (filesize < offset || filesize - offset < rsize)
|
||
{
|
||
bfd_set_error (bfd_error_file_truncated);
|
||
return NULL;
|
||
}
|
||
|
||
void *mem;
|
||
mem = bfd_mmap (abfd, NULL, rsize, prot, MAP_PRIVATE, offset,
|
||
map_addr, map_size);
|
||
return mem;
|
||
}
|
||
|
||
/* Mmap a readonly memory region of RSIZE bytes at the current offset.
|
||
Return mmap address and size in MAP_ADDR and MAP_SIZE. Return NULL
|
||
on invalid input and MAP_FAILED for mmap failure. */
|
||
|
||
void *
|
||
_bfd_mmap_readonly_temporary (bfd *abfd, size_t rsize, void **map_addr,
|
||
size_t *map_size)
|
||
{
|
||
/* Use mmap only if section size >= the minimum mmap section size. */
|
||
if (rsize < _bfd_minimum_mmap_size)
|
||
{
|
||
void *mem = _bfd_malloc_and_read (abfd, rsize, rsize);
|
||
/* NB: Set *MAP_ADDR to MEM and *MAP_SIZE to 0 to indicate that
|
||
_bfd_malloc_and_read is called. */
|
||
*map_addr = mem;
|
||
*map_size = 0;
|
||
return mem;
|
||
}
|
||
|
||
return bfd_mmap_local (abfd, rsize, PROT_READ, map_addr, map_size);
|
||
}
|
||
|
||
/* Munmap RSIZE bytes at PTR. */
|
||
|
||
void
|
||
_bfd_munmap_readonly_temporary (void *ptr, size_t rsize)
|
||
{
|
||
/* NB: Since _bfd_munmap_readonly_temporary is called like free, PTR
|
||
may be NULL. Otherwise, PTR and RSIZE must be valid. If RSIZE is
|
||
0, _bfd_malloc_and_read is called. */
|
||
if (ptr == NULL)
|
||
return;
|
||
if (rsize != 0)
|
||
{
|
||
if (munmap (ptr, rsize) != 0)
|
||
abort ();
|
||
}
|
||
else
|
||
free (ptr);
|
||
}
|
||
|
||
/* Mmap a readonly memory region of RSIZE bytes at the current offset.
|
||
Return NULL on invalid input or mmap failure. */
|
||
|
||
void *
|
||
_bfd_mmap_readonly_persistent (bfd *abfd, size_t rsize)
|
||
{
|
||
/* Use mmap only if section size >= the minimum mmap section size. */
|
||
if (rsize < _bfd_minimum_mmap_size)
|
||
return _bfd_alloc_and_read (abfd, rsize, rsize);
|
||
|
||
void *mem, *map_addr;
|
||
size_t map_size;
|
||
mem = bfd_mmap_local (abfd, rsize, PROT_READ, &map_addr, &map_size);
|
||
if (mem == NULL)
|
||
return mem;
|
||
if (mem == MAP_FAILED)
|
||
return _bfd_alloc_and_read (abfd, rsize, rsize);
|
||
|
||
struct bfd_mmapped_entry *entry;
|
||
unsigned int next_entry;
|
||
struct bfd_mmapped *mmapped = abfd->mmapped;
|
||
if (mmapped != NULL
|
||
&& (next_entry = mmapped->next_entry) < mmapped->max_entry)
|
||
{
|
||
entry = &mmapped->entries[next_entry];
|
||
mmapped->next_entry++;
|
||
}
|
||
else
|
||
{
|
||
mmapped = bfd_allocate_mmapped_page (abfd, &entry);
|
||
if (mmapped == NULL)
|
||
{
|
||
munmap (map_addr, map_size);
|
||
return NULL;
|
||
}
|
||
}
|
||
|
||
entry->addr = map_addr;
|
||
entry->size = map_size;
|
||
|
||
return mem;
|
||
}
|
||
#endif
|
||
|
||
/* Attempt to read *SIZE_P bytes from ABFD's iostream to *DATA_P.
|
||
Return true if the full the amount has been read. If *DATA_P is
|
||
NULL, mmap should be used, return the memory address at the
|
||
current offset in *DATA_P as well as return mmap address and size
|
||
in *MMAP_BASE and *SIZE_P. Otherwise, return NULL in *MMAP_BASE
|
||
and 0 in *SIZE_P. If FINAL_LINK is true, this is called from
|
||
elf_link_read_relocs_from_section. */
|
||
|
||
bool
|
||
_bfd_mmap_read_temporary (void **data_p, size_t *size_p,
|
||
void **mmap_base, bfd *abfd,
|
||
bool final_link ATTRIBUTE_UNUSED)
|
||
{
|
||
void *data = *data_p;
|
||
size_t size = *size_p;
|
||
|
||
#ifdef USE_MMAP
|
||
/* NB: When FINAL_LINK is true, the size of the preallocated buffer
|
||
is _bfd_minimum_mmap_size and use mmap if the data size >=
|
||
_bfd_minimum_mmap_size. Otherwise, use mmap if ABFD isn't an IR
|
||
input or the data size >= _bfd_minimum_mmap_size. */
|
||
bool use_mmmap;
|
||
bool mmap_size = size >= _bfd_minimum_mmap_size;
|
||
if (final_link)
|
||
use_mmmap = mmap_size;
|
||
else
|
||
use_mmmap = (mmap_size
|
||
&& data == NULL
|
||
&& (abfd->flags & BFD_PLUGIN) == 0);
|
||
if (use_mmmap)
|
||
{
|
||
void *mmaped = _bfd_mmap_readonly_temporary (abfd, size,
|
||
mmap_base,
|
||
size_p);
|
||
/* MAP_FAILED is returned when called from GDB on an object with
|
||
opncls_iovec. Use bfd_read in this case. */
|
||
if (mmaped != MAP_FAILED)
|
||
{
|
||
if (mmaped == NULL)
|
||
abort ();
|
||
*data_p = mmaped;
|
||
return true;
|
||
}
|
||
}
|
||
#endif
|
||
|
||
if (data == NULL)
|
||
{
|
||
data = bfd_malloc (size);
|
||
if (data == NULL)
|
||
return false;
|
||
*data_p = data;
|
||
/* NB: _bfd_munmap_readonly_temporary will free *MMAP_BASE if
|
||
*SIZE_P == 0. */
|
||
*mmap_base = data;
|
||
}
|
||
else
|
||
*mmap_base = NULL;
|
||
*size_p = 0;
|
||
return bfd_read (data, size, abfd) == size;
|
||
}
|
||
|
||
/* Default implementation */
|
||
|
||
bool
|
||
_bfd_generic_get_section_contents (bfd *abfd,
|
||
sec_ptr section,
|
||
void *location,
|
||
file_ptr offset,
|
||
bfd_size_type count)
|
||
{
|
||
bfd_size_type sz;
|
||
if (count == 0)
|
||
return true;
|
||
|
||
if (section->compress_status != COMPRESS_SECTION_NONE)
|
||
{
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: unable to get decompressed section %pA"),
|
||
abfd, section);
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
return false;
|
||
}
|
||
|
||
#ifdef USE_MMAP
|
||
if (section->mmapped_p
|
||
&& (section->contents != NULL || location != NULL))
|
||
{
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: mapped section %pA has non-NULL buffer"),
|
||
abfd, section);
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
return false;
|
||
}
|
||
#endif
|
||
|
||
sz = bfd_get_section_limit_octets (abfd, section);
|
||
if (offset + count < count
|
||
|| offset + count > sz
|
||
|| (abfd->my_archive != NULL
|
||
&& !bfd_is_thin_archive (abfd->my_archive)
|
||
&& ((ufile_ptr) section->filepos + offset + count
|
||
> arelt_size (abfd))))
|
||
{
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
return false;
|
||
}
|
||
|
||
if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0)
|
||
return false;
|
||
|
||
#ifdef USE_MMAP
|
||
if (section->mmapped_p)
|
||
{
|
||
if (location != 0
|
||
|| bfd_get_flavour (abfd) != bfd_target_elf_flavour)
|
||
abort ();
|
||
|
||
int prot = ((section->reloc_count == 0)
|
||
? PROT_READ : PROT_READ | PROT_WRITE);
|
||
|
||
location = bfd_mmap_local
|
||
(abfd, count, prot, &elf_section_data (section)->contents_addr,
|
||
&elf_section_data (section)->contents_size);
|
||
|
||
if (location == NULL)
|
||
return false;
|
||
|
||
/* Check for iovec not supporting mmap. */
|
||
if (location != MAP_FAILED)
|
||
{
|
||
section->contents = location;
|
||
return true;
|
||
}
|
||
|
||
/* Malloc the buffer and call bfd_read. */
|
||
location = (bfd_byte *) bfd_malloc (count);
|
||
if (location == NULL)
|
||
{
|
||
if (bfd_get_error () == bfd_error_no_memory)
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("error: %pB(%pA) is too large (%#" PRIx64 " bytes)"),
|
||
abfd, section, (uint64_t) count);
|
||
return false;
|
||
}
|
||
section->contents = location;
|
||
}
|
||
#endif
|
||
|
||
if (bfd_read (location, count, abfd) != count)
|
||
return false;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* This generic function can only be used in implementations where creating
|
||
NEW sections is disallowed. It is useful in patching existing sections
|
||
in read-write files, though. See other set_section_contents functions
|
||
to see why it doesn't work for new sections. */
|
||
bool
|
||
_bfd_generic_set_section_contents (bfd *abfd,
|
||
sec_ptr section,
|
||
const void *location,
|
||
file_ptr offset,
|
||
bfd_size_type count)
|
||
{
|
||
if (count == 0)
|
||
return true;
|
||
|
||
if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
|
||
|| bfd_write (location, count, abfd) != count)
|
||
return false;
|
||
|
||
return true;
|
||
}
|
||
|
||
/*
|
||
INTERNAL_FUNCTION
|
||
bfd_log2
|
||
|
||
SYNOPSIS
|
||
unsigned int bfd_log2 (bfd_vma x);
|
||
|
||
DESCRIPTION
|
||
Return the log base 2 of the value supplied, rounded up. E.g., an
|
||
@var{x} of 1025 returns 11. A @var{x} of 0 returns 0.
|
||
*/
|
||
|
||
unsigned int
|
||
bfd_log2 (bfd_vma x)
|
||
{
|
||
unsigned int result = 0;
|
||
|
||
if (x <= 1)
|
||
return result;
|
||
--x;
|
||
do
|
||
++result;
|
||
while ((x >>= 1) != 0);
|
||
return result;
|
||
}
|
||
|
||
bool
|
||
bfd_generic_is_local_label_name (bfd *abfd, const char *name)
|
||
{
|
||
char locals_prefix = (bfd_get_symbol_leading_char (abfd) == '_') ? 'L' : '.';
|
||
|
||
return name[0] == locals_prefix;
|
||
}
|
||
|
||
/* Helper function for reading uleb128 encoded data. */
|
||
|
||
bfd_vma
|
||
_bfd_read_unsigned_leb128 (bfd *abfd ATTRIBUTE_UNUSED,
|
||
bfd_byte *buf,
|
||
unsigned int *bytes_read_ptr)
|
||
{
|
||
bfd_vma result;
|
||
unsigned int num_read;
|
||
unsigned int shift;
|
||
bfd_byte byte;
|
||
|
||
result = 0;
|
||
shift = 0;
|
||
num_read = 0;
|
||
do
|
||
{
|
||
byte = bfd_get_8 (abfd, buf);
|
||
buf++;
|
||
num_read++;
|
||
if (shift < 8 * sizeof (result))
|
||
{
|
||
result |= (((bfd_vma) byte & 0x7f) << shift);
|
||
shift += 7;
|
||
}
|
||
}
|
||
while (byte & 0x80);
|
||
*bytes_read_ptr = num_read;
|
||
return result;
|
||
}
|
||
|
||
/* Read in a LEB128 encoded value from ABFD starting at *PTR.
|
||
If SIGN is true, return a signed LEB128 value.
|
||
*PTR is incremented by the number of bytes read.
|
||
No bytes will be read at address END or beyond. */
|
||
|
||
bfd_vma
|
||
_bfd_safe_read_leb128 (bfd *abfd ATTRIBUTE_UNUSED,
|
||
bfd_byte **ptr,
|
||
bool sign,
|
||
const bfd_byte * const end)
|
||
{
|
||
bfd_vma result = 0;
|
||
unsigned int shift = 0;
|
||
bfd_byte byte = 0;
|
||
bfd_byte *data = *ptr;
|
||
|
||
while (data < end)
|
||
{
|
||
byte = bfd_get_8 (abfd, data);
|
||
data++;
|
||
if (shift < 8 * sizeof (result))
|
||
{
|
||
result |= ((bfd_vma) (byte & 0x7f)) << shift;
|
||
shift += 7;
|
||
}
|
||
if ((byte & 0x80) == 0)
|
||
break;
|
||
}
|
||
|
||
*ptr = data;
|
||
|
||
if (sign && (shift < 8 * sizeof (result)) && (byte & 0x40))
|
||
result |= -((bfd_vma) 1 << shift);
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Helper function for reading sleb128 encoded data. */
|
||
|
||
bfd_signed_vma
|
||
_bfd_read_signed_leb128 (bfd *abfd ATTRIBUTE_UNUSED,
|
||
bfd_byte *buf,
|
||
unsigned int *bytes_read_ptr)
|
||
{
|
||
bfd_vma result;
|
||
unsigned int shift;
|
||
unsigned int num_read;
|
||
bfd_byte byte;
|
||
|
||
result = 0;
|
||
shift = 0;
|
||
num_read = 0;
|
||
do
|
||
{
|
||
byte = bfd_get_8 (abfd, buf);
|
||
buf ++;
|
||
num_read ++;
|
||
if (shift < 8 * sizeof (result))
|
||
{
|
||
result |= (((bfd_vma) byte & 0x7f) << shift);
|
||
shift += 7;
|
||
}
|
||
}
|
||
while (byte & 0x80);
|
||
if (shift < 8 * sizeof (result) && (byte & 0x40))
|
||
result |= (((bfd_vma) -1) << shift);
|
||
*bytes_read_ptr = num_read;
|
||
return result;
|
||
}
|
||
|
||
/* Write VAL in uleb128 format to P.
|
||
END indicates the last byte of allocated space for the uleb128 value to fit
|
||
in.
|
||
Return a pointer to the byte following the last byte that was written, or
|
||
NULL if the uleb128 value does not fit in the allocated space between P and
|
||
END. */
|
||
bfd_byte *
|
||
_bfd_write_unsigned_leb128 (bfd_byte *p, bfd_byte *end, bfd_vma val)
|
||
{
|
||
bfd_byte c;
|
||
do
|
||
{
|
||
if (p > end)
|
||
return NULL;
|
||
c = val & 0x7f;
|
||
val >>= 7;
|
||
if (val)
|
||
c |= 0x80;
|
||
*(p++) = c;
|
||
}
|
||
while (val);
|
||
return p;
|
||
}
|
||
|
||
bool
|
||
_bfd_generic_init_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED,
|
||
asection *isec ATTRIBUTE_UNUSED,
|
||
bfd *obfd ATTRIBUTE_UNUSED,
|
||
asection *osec ATTRIBUTE_UNUSED,
|
||
struct bfd_link_info *link_info ATTRIBUTE_UNUSED)
|
||
{
|
||
return true;
|
||
}
|
||
|
||
#ifdef HAVE_MMAP
|
||
uintptr_t _bfd_pagesize;
|
||
uintptr_t _bfd_pagesize_m1;
|
||
uintptr_t _bfd_minimum_mmap_size;
|
||
|
||
__attribute__ ((unused, constructor))
|
||
static void
|
||
bfd_init_pagesize (void)
|
||
{
|
||
_bfd_pagesize = getpagesize ();
|
||
if (_bfd_pagesize == 0)
|
||
abort ();
|
||
_bfd_pagesize_m1 = _bfd_pagesize - 1;
|
||
/* The minimum section size to use mmap. */
|
||
_bfd_minimum_mmap_size = _bfd_pagesize * 4;
|
||
}
|
||
#endif
|