glibc/elf/dl-audit.c
Adhemerval Zanella 198660741b elf: Add _dl_audit_objclose
It consolidates the code required to call la_objclose audit
callback.

Checked on x86_64-linux-gnu, i686-linux-gnu, and aarch64-linux-gnu.

Reviewed-by: Florian Weimer <fweimer@redhat.com>
(cherry picked from commit 311c9ee54e)
2022-04-08 14:18:11 -04:00

109 lines
3.0 KiB
C

/* Audit common functions.
Copyright (C) 2021 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/>. */
#include <ldsodefs.h>
void
_dl_audit_activity_map (struct link_map *l, int action)
{
struct audit_ifaces *afct = GLRO(dl_audit);
for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt)
{
if (afct->activity != NULL)
afct->activity (&link_map_audit_state (l, cnt)->cookie, action);
afct = afct->next;
}
}
void
_dl_audit_activity_nsid (Lmid_t nsid, int action)
{
/* If head is NULL, the namespace has become empty, and the audit interface
does not give us a way to signal LA_ACT_CONSISTENT for it because the
first loaded module is used to identify the namespace. */
struct link_map *head = GL(dl_ns)[nsid]._ns_loaded;
if (__glibc_likely (GLRO(dl_naudit) == 0)
|| head == NULL || head->l_auditing)
return;
_dl_audit_activity_map (head, action);
}
const char *
_dl_audit_objsearch (const char *name, struct link_map *l, unsigned int code)
{
if (l == NULL || l->l_auditing || code == 0)
return name;
struct audit_ifaces *afct = GLRO(dl_audit);
for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt)
{
if (afct->objsearch != NULL)
{
struct auditstate *state = link_map_audit_state (l, cnt);
name = afct->objsearch (name, &state->cookie, code);
if (name == NULL)
return NULL;
}
afct = afct->next;
}
return name;
}
void
_dl_audit_objopen (struct link_map *l, Lmid_t nsid)
{
if (__glibc_likely (GLRO(dl_naudit) == 0))
return;
struct audit_ifaces *afct = GLRO(dl_audit);
for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt)
{
if (afct->objopen != NULL)
{
struct auditstate *state = link_map_audit_state (l, cnt);
state->bindflags = afct->objopen (l, nsid, &state->cookie);
l->l_audit_any_plt |= state->bindflags != 0;
}
afct = afct->next;
}
}
void
_dl_audit_objclose (struct link_map *l)
{
if (__glibc_likely (GLRO(dl_naudit) == 0)
|| GL(dl_ns)[l->l_ns]._ns_loaded->l_auditing)
return;
struct audit_ifaces *afct = GLRO(dl_audit);
for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt)
{
if (afct->objclose != NULL)
{
struct auditstate *state= link_map_audit_state (l, cnt);
/* Return value is ignored. */
afct->objclose (&state->cookie);
}
afct = afct->next;
}
}