diff options
Diffstat (limited to 'lib/libpthread/thread/thr_private.h')
| -rw-r--r-- | lib/libpthread/thread/thr_private.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/lib/libpthread/thread/thr_private.h b/lib/libpthread/thread/thr_private.h index 9d8ee63..9d58078 100644 --- a/lib/libpthread/thread/thr_private.h +++ b/lib/libpthread/thread/thr_private.h @@ -60,6 +60,40 @@ #endif /* + * Unfortunately, libpthread had symbol versioning before libc. + * But now libc has symbol versioning, we need to occupy the + * same version namespace in order to override some libc functions. + * So in order to avoid breaking binaries requiring symbols from + * LIBTHREAD_1_0, we need to provide a compatible interface for + * those symbols. + */ +#if defined(SYMBOL_VERSIONING) && defined(PIC) +#define SYM_LT10(sym) __CONCAT(sym, _lt10) +#define SYM_FB10(sym) __CONCAT(sym, _fb10) +#define SYM_FBP10(sym) __CONCAT(sym, _fbp10) +#define WEAK_REF(sym, alias) __weak_reference(sym, alias) +#define SYM_COMPAT(sym, impl, ver) __sym_compat(sym, impl, ver) +#define SYM_DEFAULT(sym, impl, ver) __sym_default(sym, impl, ver) + +#define LT10_COMPAT(sym) \ + WEAK_REF(sym, SYM_LT10(sym)); \ + SYM_COMPAT(sym, SYM_LT10(sym), LIBTHREAD_1_0) + +#define LT10_COMPAT_DEFAULT(sym) \ + LT10_COMPAT(sym); \ + WEAK_REF(sym, SYM_FB10(sym)); \ + SYM_DEFAULT(sym, SYM_FB10(sym), FBSD_1.0) + +#define LT10_COMPAT_PRIVATE(sym) \ + LT10_COMPAT(sym); \ + WEAK_REF(sym, SYM_FBP10(sym)); \ + SYM_DEFAULT(sym, SYM_FBP10(sym), FBSDprivate) +#else +#define LT10_COMPAT_DEFAULT(sym) +#define LT10_COMPAT_PRIVATE(sym) +#endif + +/* * Evaluate the storage class specifier. */ #ifdef GLOBAL_PTHREAD_PRIVATE |
