diff options
Diffstat (limited to 'sysdeps/generic')
| -rw-r--r-- | sysdeps/generic/dl-tls.c | 27 | ||||
| -rw-r--r-- | sysdeps/generic/libc-tls.c | 18 |
2 files changed, 35 insertions, 10 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); } diff --git a/sysdeps/generic/libc-tls.c b/sysdeps/generic/libc-tls.c index 1461bf8543..b5ecc36436 100644 --- a/sysdeps/generic/libc-tls.c +++ b/sysdeps/generic/libc-tls.c @@ -1,5 +1,5 @@ /* Initialization code for TLS in statically linked application. - Copyright (C) 2002 Free Software Foundation, Inc. + Copyright (C) 2002, 2003 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -134,15 +134,16 @@ __libc_setup_tls (size_t tcbsize, size_t tcbalign) break; } +#ifdef TLS_INIT_TP_EXPENSIVE if (memsz == 0 && tcbsize <= TLS_INIT_TCB_SIZE) { /* We do not need a TLS block and no thread descriptor. */ -#ifdef NONTLS_INIT_TP +# ifdef NONTLS_INIT_TP NONTLS_INIT_TP; -#endif +# endif return; } - +#endif /* We have to set up the TCB block which also (possibly) contains 'errno'. Therefore we avoid 'malloc' which might touch 'errno'. @@ -157,8 +158,10 @@ __libc_setup_tls (size_t tcbsize, size_t tcbalign) tcb_offset = roundup (memsz + GL(dl_tls_static_size), tcbalign); tlsblock = __sbrk (tcb_offset + tcbsize + max_align); # elif TLS_DTV_AT_TP - tlsblock = __sbrk (roundup (tcbsize, align) + memsz + max_align - + GL(dl_tls_static_size)); + tcb_offset = roundup (tcbsize, align ?: 1); + tlsblock = __sbrk (tcb_offset + memsz + max_align + + TLS_PRE_TCB_SIZE + GL(dl_tls_static_size)); + tlsblock += TLS_PRE_TCB_SIZE; # else /* In case a model with a different layout for the TCB and DTV is defined add another #elif here and in the following #ifs. */ @@ -179,7 +182,6 @@ __libc_setup_tls (size_t tcbsize, size_t tcbalign) - roundup (memsz, align ?: 1)); static_map.l_tls_offset = roundup (memsz, align ?: 1); # elif TLS_DTV_AT_TP - tcb_offset = roundup (tcbsize, align); static_dtv[2].pointer = (char *) tlsblock + tcb_offset; static_map.l_tls_offset = tcb_offset; # else @@ -222,6 +224,8 @@ __libc_setup_tls (size_t tcbsize, size_t tcbalign) # if TLS_TCB_AT_TP memsz += tcbsize; +# elif TLS_DTV_AT_TP + memsz += tcb_offset; # endif init_static_tls (memsz, MAX (TLS_TCB_ALIGN, max_align)); |