diff options
Diffstat (limited to 'sysdeps/generic/dl-tls.c')
| -rw-r--r-- | sysdeps/generic/dl-tls.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/sysdeps/generic/dl-tls.c b/sysdeps/generic/dl-tls.c index 6791d765ee..0afe379ae6 100644 --- a/sysdeps/generic/dl-tls.c +++ b/sysdeps/generic/dl-tls.c @@ -282,9 +282,18 @@ internal_function _dl_allocate_tls_storage (void) { void *result; + size_t size = GL(dl_tls_static_size); + +# if TLS_DTV_AT_TP + /* Memory layout is: + [ TLS_PRE_TCB_SIZE ] [ TLS_TCB_SIZE ] [ TLS blocks ] + ^ This should be returned. */ + size += (TLS_PRE_TCB_SIZE + GL(dl_tls_static_align) - 1) + & ~(GL(dl_tls_static_align) - 1); +# endif /* Allocate a correctly aligned chunk of memory. */ - result = __libc_memalign (GL(dl_tls_static_align), GL(dl_tls_static_size)); + result = __libc_memalign (GL(dl_tls_static_align), size); if (__builtin_expect (result != NULL, 0)) { /* Allocate the DTV. */ @@ -292,12 +301,20 @@ _dl_allocate_tls_storage (void) # if TLS_TCB_AT_TP /* The TCB follows the TLS blocks. */ - result = (char *) result + GL(dl_tls_static_size) - TLS_TCB_SIZE; -# endif + result = (char *) result + size - TLS_TCB_SIZE; /* Clear the TCB data structure. We can't ask the caller (i.e. libpthread) to do it, because we will initialize the DTV et al. */ memset (result, 0, TLS_TCB_SIZE); +# elif TLS_DTV_AT_TP + result = (char *) result + size - GL(dl_tls_static_size); + + /* Clear the TCB data structure and TLS_PRE_TCB_SIZE bytes before it. + We can't ask the caller (i.e. libpthread) to do it, because we will + initialize the DTV et al. */ + memset ((char *) result - TLS_PRE_TCB_SIZE, 0, + TLS_PRE_TCB_SIZE + TLS_TCB_SIZE); +# endif result = allocate_dtv (result); if (result == NULL) @@ -405,6 +422,10 @@ _dl_deallocate_tls (void *tcb, bool dealloc_tcb) # if TLS_TCB_AT_TP /* The TCB follows the TLS blocks. Back up to free the whole block. */ tcb -= GL(dl_tls_static_size) - TLS_TCB_SIZE; +# elif TLS_DTV_AT_TP + /* Back up the TLS_PRE_TCB_SIZE bytes. */ + tcb -= (TLS_PRE_TCB_SIZE + GL(dl_tls_static_align) - 1) + & ~(GL(dl_tls_static_align) - 1); # endif free (tcb); } |