mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-12 16:20:06 +00:00
581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
62 lines
2.3 KiB
C
62 lines
2.3 KiB
C
/* Post-processing of a symbol produced by dlsym, dlvsym.
|
|
Copyright (C) 1999-2022 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
|
|
/* Return the link map containing the caller address. */
|
|
static struct link_map *
|
|
_dl_sym_find_caller_link_map (ElfW(Addr) caller)
|
|
{
|
|
struct link_map *l = _dl_find_dso_for_object (caller);
|
|
if (l != NULL)
|
|
return l;
|
|
else
|
|
/* If the address is not recognized the call comes from the main
|
|
program (we hope). */
|
|
return GL(dl_ns)[LM_ID_BASE]._ns_loaded;
|
|
}
|
|
|
|
/* Translates RESULT, *REF, VALUE into a symbol address from the point
|
|
of view of MATCH. Performs IFUNC resolution and auditing if
|
|
necessary. If MATCH is NULL, CALLER is used to determine it. */
|
|
static void *
|
|
_dl_sym_post (lookup_t result, const ElfW(Sym) *ref, void *value,
|
|
ElfW(Addr) caller, struct link_map *match)
|
|
{
|
|
/* Resolve indirect function address. */
|
|
if (__glibc_unlikely (ELFW(ST_TYPE) (ref->st_info) == STT_GNU_IFUNC))
|
|
{
|
|
DL_FIXUP_VALUE_TYPE fixup
|
|
= DL_FIXUP_MAKE_VALUE (result, (ElfW(Addr)) value);
|
|
fixup = elf_ifunc_invoke (DL_FIXUP_VALUE_ADDR (fixup));
|
|
value = (void *) DL_FIXUP_VALUE_CODE_ADDR (fixup);
|
|
}
|
|
|
|
#ifdef SHARED
|
|
/* Auditing checkpoint: we have a new binding. Provide the
|
|
auditing libraries the possibility to change the value and
|
|
tell us whether further auditing is wanted. */
|
|
if (__glibc_unlikely (GLRO(dl_naudit) > 0))
|
|
{
|
|
if (match == NULL)
|
|
match = _dl_sym_find_caller_link_map (caller);
|
|
_dl_audit_symbind_alt (match, ref, &value, result);
|
|
}
|
|
#endif
|
|
return value;
|
|
}
|