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add support for init_array/fini_array ctors/dtors to dynamic linker

This commit is contained in:
Rich Felker 2013-07-20 18:26:17 -04:00
parent ce8a995782
commit e69ae844dc
1 changed files with 13 additions and 2 deletions
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15
src/ldso/dynlink.c
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@ -696,7 +696,13 @@ static void do_fini()
for (p=fini_head; p; p=p->fini_next) {
if (!p->constructed) continue;
decode_vec(p->dynv, dyn, DYN_CNT);
((void (*)(void))(p->base + dyn[DT_FINI]))();
if (dyn[0] & (1<<DT_FINI_ARRAY)) {
size_t n = dyn[DT_FINI_ARRAYSZ]/sizeof(size_t);
size_t *fn = (void *)(p->base + dyn[DT_FINI_ARRAY]);
while (n--) ((void (*)(void))*fn++)();
}
if (dyn[0] & (1<<DT_FINI))
((void (*)(void))(p->base + dyn[DT_FINI]))();
}
}
@ -712,12 +718,17 @@ static void do_init_fini(struct dso *p)
if (p->constructed) continue;
p->constructed = 1;
decode_vec(p->dynv, dyn, DYN_CNT);
if (dyn[0] & (1<<DT_FINI)) {
if (dyn[0] & ((1<<DT_FINI) | (1<<DT_FINI_ARRAY))) {
p->fini_next = fini_head;
fini_head = p;
}
if (dyn[0] & (1<<DT_INIT))
((void (*)(void))(p->base + dyn[DT_INIT]))();
if (dyn[0] & (1<<DT_INIT_ARRAY)) {
size_t n = dyn[DT_INIT_ARRAYSZ]/sizeof(size_t);
size_t *fn = (void *)(p->base + dyn[DT_INIT_ARRAY]);
while (n--) ((void (*)(void))*fn++)();
}
if (!need_locking && libc.threads_minus_1) {
need_locking = 1;
pthread_mutex_lock(&init_fini_lock);