diff options
Diffstat (limited to 'nptl/pt-system.c')
| -rw-r--r-- | nptl/pt-system.c | 24 |
1 files changed, 8 insertions, 16 deletions
diff --git a/nptl/pt-system.c b/nptl/pt-system.c index f8ca6ba..b30ddf2 100644 --- a/nptl/pt-system.c +++ b/nptl/pt-system.c @@ -25,29 +25,21 @@ libpthread, but the historical ABI requires it. For static linking, there is no need to provide anything here--the libc version will be linked in. For shared library ABI compatibility, there must be a - 'system' symbol in libpthread.so; so we define it using IFUNC to - redirect to the libc function. */ + 'system' symbol in libpthread.so. -#if SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_22) - -# if HAVE_IFUNC - -extern __typeof(system) system_ifunc; -# undef INIT_ARCH -# define INIT_ARCH() -libc_ifunc (system_ifunc, &__libc_system) + With an IFUNC resolver, it would be possible to avoid the indirection, + but the IFUNC resolver might run before the __libc_system symbol has + been relocated, in which case the IFUNC resolver would not be able to + provide the correct address. */ -# else /* !HAVE_IFUNC */ +#if SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_22) static int __attribute__ ((used)) system_compat (const char *line) { return __libc_system (line); } -strong_alias (system_compat, system_ifunc) - -# endif /* HAVE_IFUNC */ - -compat_symbol (libpthread, system_ifunc, system, GLIBC_2_0); +strong_alias (system_compat, system_alias) +compat_symbol (libpthread, system_alias, system, GLIBC_2_0); #endif |