diff options
| author | Christophe Lyon <christophe.lyon@st.com> | 2018-07-04 17:55:32 +0200 |
|---|---|---|
| committer | Waldemar Brodkorb <wbrodkorb@conet.de> | 2018-08-10 16:02:45 +0200 |
| commit | eae96c1e2b02af0554bbae189af2c8091cb581bf (patch) | |
| tree | 392822d624567e125fabac3074ab8b7317d3846c /libpthread/nptl/sysdeps/unix/sysv/linux/register-atfork.c | |
| parent | 5b9a9801a4867af70c9ed55379b3eaa3dba59ef3 (diff) | |
nptl: Disable fork and atfork on MMU-less systems.
They do not work on MMU-less systems.
For atfork, implement a hidden function that always returns EPERM.
* libpthread/nptl/sysdeps/unix/sysv/linux/fork.c: Disable if
__ARCH_USE_MMU__ is not defined.
* libpthread/nptl/sysdeps/unix/sysv/linux/libc_pthread_init.c
(__libc_pthread_init): Handle __ARCH_USE_MMU__.
* libpthread/nptl/sysdeps/unix/sysv/linux/register-atfork.c: Likewise.
* libpthread/nptl/sysdeps/unix/sysv/linux/unregister-atfork.c: Likewise.
Signed-off-by: Mickaël Guêné <mickael.guene@st.com>
Signed-off-by: Christophe Lyon <christophe.lyon@st.com>
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/register-atfork.c')
| -rw-r--r-- | libpthread/nptl/sysdeps/unix/sysv/linux/register-atfork.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/register-atfork.c b/libpthread/nptl/sysdeps/unix/sysv/linux/register-atfork.c index b745f9d71..55835e504 100644 --- a/libpthread/nptl/sysdeps/unix/sysv/linux/register-atfork.c +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/register-atfork.c @@ -24,6 +24,7 @@ #include <tls.h> +#ifdef __ARCH_USE_MMU__ /* Lock to protect allocation and deallocation of fork handlers. */ int __fork_lock = LLL_LOCK_INITIALIZER; @@ -118,6 +119,18 @@ __linkin_atfork (struct fork_handler *newp) while (catomic_compare_and_exchange_bool_acq (&__fork_handlers, newp, newp->next) != 0); } +#else +int +__register_atfork ( + void (*prepare) (void), + void (*parent) (void), + void (*child) (void), + void *dso_handle) +{ + return EPERM; +} +libc_hidden_def (__register_atfork) +#endif #if 0 libc_freeres_fn (free_mem) @@ -145,4 +158,3 @@ libc_freeres_fn (free_mem) } } #endif - |