| commit aee6e90f93e285016b6cd9c8bd00402c19ba271b |
| Author: Adhemerval Zanella <adhemerval.zanella@linaro.org> |
| Date: Mon Jul 19 15:47:51 2021 -0300 |
| |
| elf: Add _dl_audit_objopen |
| |
| It consolidates the code required to call la_objopen audit callback. |
| |
| Checked on x86_64-linux-gnu, i686-linux-gnu, and aarch64-linux-gnu. |
| |
| Reviewed-by: Florian Weimer <fweimer@redhat.com> |
| |
| Conflicts: |
| elf/Makefile |
| |
| diff --git a/elf/Makefile b/elf/Makefile |
| index 2312184692433313..08a32a712a34f2cc 100644 |
| |
| |
| @@ -64,7 +64,8 @@ elide-routines.os = $(all-dl-routines) dl-support enbl-secure dl-origin \ |
| # interpreter and operating independent of libc. |
| rtld-routines = rtld $(all-dl-routines) dl-sysdep dl-environ dl-minimal \ |
| dl-error-minimal dl-conflict dl-hwcaps dl-hwcaps_split dl-hwcaps-subdirs \ |
| - dl-usage dl-diagnostics dl-diagnostics-kernel dl-diagnostics-cpu |
| + dl-usage dl-diagnostics dl-diagnostics-kernel dl-diagnostics-cpu \ |
| + dl-audit |
| all-rtld-routines = $(rtld-routines) $(sysdep-rtld-routines) |
| |
| CFLAGS-dl-runtime.c += -fexceptions -fasynchronous-unwind-tables |
| diff --git a/elf/dl-audit.c b/elf/dl-audit.c |
| new file mode 100644 |
| index 0000000000000000..4066dfe85146b9d4 |
| |
| |
| @@ -0,0 +1,39 @@ |
| +/* 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_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; |
| + } |
| +} |
| diff --git a/elf/dl-load.c b/elf/dl-load.c |
| index de5aef5777045da5..c11b1d1781e9b40b 100644 |
| |
| |
| @@ -1436,22 +1436,8 @@ cannot enable executable stack as shared object requires"); |
| |
| #ifdef SHARED |
| /* Auditing checkpoint: we have a new object. */ |
| - if (__glibc_unlikely (GLRO(dl_naudit) > 0) |
| - && !GL(dl_ns)[l->l_ns]._ns_loaded->l_auditing) |
| - { |
| - 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; |
| - } |
| - } |
| + if (!GL(dl_ns)[l->l_ns]._ns_loaded->l_auditing) |
| + _dl_audit_objopen (l, nsid); |
| #endif |
| |
| return l; |
| diff --git a/elf/rtld.c b/elf/rtld.c |
| index f3836b8a78faaf27..1982e42390760e0a 100644 |
| |
| |
| @@ -1075,25 +1075,6 @@ ERROR: audit interface '%s' requires version %d (maximum supported version %d); |
| dlmargs.map->l_auditing = 1; |
| } |
| |
| -/* Notify the the audit modules that the object MAP has already been |
| - loaded. */ |
| -static void |
| -notify_audit_modules_of_loaded_object (struct link_map *map) |
| -{ |
| - 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 (map, cnt); |
| - state->bindflags = afct->objopen (map, LM_ID_BASE, &state->cookie); |
| - map->l_audit_any_plt |= state->bindflags != 0; |
| - } |
| - |
| - afct = afct->next; |
| - } |
| -} |
| - |
| /* Load all audit modules. */ |
| static void |
| load_audit_modules (struct link_map *main_map, struct audit_list *audit_list) |
| @@ -1112,8 +1093,8 @@ load_audit_modules (struct link_map *main_map, struct audit_list *audit_list) |
| program and the dynamic linker itself). */ |
| if (GLRO(dl_naudit) > 0) |
| { |
| - notify_audit_modules_of_loaded_object (main_map); |
| - notify_audit_modules_of_loaded_object (&GL(dl_rtld_map)); |
| + _dl_audit_objopen (main_map, LM_ID_BASE); |
| + _dl_audit_objopen (&GL(dl_rtld_map), LM_ID_BASE); |
| } |
| } |
| |
| diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h |
| index 2dd6f0c3c4aaaef5..410f070e28b74bdf 100644 |
| |
| |
| @@ -1268,6 +1268,11 @@ link_map_audit_state (struct link_map *l, size_t index) |
| { |
| return &l->l_audit[index]; |
| } |
| + |
| +/* Call the la_objopen from the audit modules for the link_map L on the |
| + namespace identification NSID. */ |
| +void _dl_audit_objopen (struct link_map *l, Lmid_t nsid) |
| + attribute_hidden; |
| #endif /* SHARED */ |
| |
| __END_DECLS |