diff options
Diffstat (limited to 'ldso/ldso/dl-hash.c')
| -rw-r--r-- | ldso/ldso/dl-hash.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/ldso/ldso/dl-hash.c b/ldso/ldso/dl-hash.c index 863f8fb6e..5de38a61e 100644 --- a/ldso/ldso/dl-hash.c +++ b/ldso/ldso/dl-hash.c @@ -59,14 +59,20 @@ struct dyn_elf *_dl_handles = NULL; * it to decode the hash table. */ static inline unsigned long _dl_elf_hash(const unsigned char *name) { - unsigned long hash = 0; + unsigned long hash=0; unsigned long tmp; while (*name) { hash = (hash << 4) + *name++; - if ((tmp = hash & 0xf0000000)) - hash ^= tmp >> 24; - hash &= ~tmp; + tmp = hash & 0xf0000000; + /* The algorithm specified in the ELF ABI is as follows: + if (tmp != 0) + hash ^= tmp >> 24; + hash &= ~tmp; + But the following is equivalent and a lot + faster, especially on modern processors. */ + hash ^= tmp; + hash ^= tmp >> 24; } return hash; } |