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| author | Florian Weimer <fweimer@redhat.com> | 2016-08-03 16:15:38 +0200 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2016-08-03 16:15:38 +0200 |
| commit | a2ff21f825adb8821eeb6145197fa8b9a8a60a58 (patch) | |
| tree | 65f74b90eb0a005a278f80586b0ee001d358021b /csu/libc-tls.c | |
| parent | 5bc17330eb7667b96fee8baf3729c3310fa28b40 (diff) | |
| download | glibc-a2ff21f825adb8821eeb6145197fa8b9a8a60a58.zip glibc-a2ff21f825adb8821eeb6145197fa8b9a8a60a58.tar.gz glibc-a2ff21f825adb8821eeb6145197fa8b9a8a60a58.tar.bz2 | |
elf: Avoid using memalign for TLS allocations [BZ #17730]
Instead of a flag which indicates the pointer can be freed, dtv_t
now includes the pointer which should be freed. Due to padding,
the size of dtv_t does not increase.
To avoid using memalign, the new allocate_dtv_entry function
allocates a sufficiently large buffer so that a sub-buffer
can be found in it which starts with an aligned pointer. Both
the aligned and original pointers are kept, the latter for calling
free later.
Diffstat (limited to 'csu/libc-tls.c')
| -rw-r--r-- | csu/libc-tls.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/csu/libc-tls.c b/csu/libc-tls.c index d6425e0..235ac79 100644 --- a/csu/libc-tls.c +++ b/csu/libc-tls.c @@ -175,7 +175,7 @@ __libc_setup_tls (size_t tcbsize, size_t tcbalign) #else # error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined" #endif - _dl_static_dtv[2].pointer.is_static = true; + _dl_static_dtv[2].pointer.to_free = NULL; /* sbrk gives us zero'd memory, so we don't need to clear the remainder. */ memcpy (_dl_static_dtv[2].pointer.val, initimage, filesz); |