From 5ba238e1e48d2fe4107e09903b26b2b36aa9e9ff Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Thu, 19 Jun 2014 02:59:44 -0400 Subject: separate __tls_get_addr implementation from dynamic linker/init_tls such separation serves multiple purposes: - by having the common path for __tls_get_addr alone in its own function with a tail call to the slow case, code generation is greatly improved. - by having __tls_get_addr in it own file, it can be replaced on a per-arch basis as needed, for optimization or ABI-specific purposes. - by removing __tls_get_addr from __init_tls.c, a few bytes of code are shaved off of static binaries (which are unlikely to use this function unless the linker messed up). --- src/ldso/dynlink.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'src/ldso') diff --git a/src/ldso/dynlink.c b/src/ldso/dynlink.c index 2b6f0c94..bc4f2f6f 100644 --- a/src/ldso/dynlink.c +++ b/src/ldso/dynlink.c @@ -1031,17 +1031,15 @@ void *__copy_tls(unsigned char *mem) return td; } -void *__tls_get_addr(size_t *v) +void *__tls_get_new(size_t *v) { pthread_t self = __pthread_self(); - if (v[0]<=(size_t)self->dtv[0]) - return (char *)self->dtv[v[0]]+v[1]; /* Block signals to make accessing new TLS async-signal-safe */ sigset_t set; - pthread_sigmask(SIG_BLOCK, SIGALL_SET, &set); + __block_all_sigs(&set); if (v[0]<=(size_t)self->dtv[0]) { - pthread_sigmask(SIG_SETMASK, &set, 0); + __restore_sigs(&set); return (char *)self->dtv[v[0]]+v[1]; } @@ -1074,7 +1072,7 @@ void *__tls_get_addr(size_t *v) memcpy(mem, p->tls_image, p->tls_len); if (p->tls_id == v[0]) break; } - pthread_sigmask(SIG_SETMASK, &set, 0); + __restore_sigs(&set); return mem + v[1]; } @@ -1442,6 +1440,8 @@ static int invalid_dso_handle(void *h) return 1; } +void *__tls_get_addr(size_t *); + static void *do_dlsym(struct dso *p, const char *s, void *ra) { size_t i; -- cgit v1.2.3-70-g09d2