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| author |   Andreas Schwab <schwab@linux-m68k.org> | 2011-11-01 18:05:31 +0100 |
|---|---|---|
| committer | Andreas Schwab <schwab@linux-m68k.org> | 2011-11-01 18:29:34 +0100 |
| commit | 647776f663e8bb9ee365e0dbabd3702b8cb80bc3 (patch) | |
| tree | 77affe2269ba680a6239396a9cb589283963fc71 | |
| parent | Ignore libaudit.h when checking for system header use (diff) | |
| download | glibc-647776f663e8bb9ee365e0dbabd3702b8cb80bc3.tar.gz glibc-647776f663e8bb9ee365e0dbabd3702b8cb80bc3.tar.bz2 glibc-647776f663e8bb9ee365e0dbabd3702b8cb80bc3.zip | |
Account for alloca size rounding in extend_alloca
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | elf/dl-deps.c | 8 | ||||
| -rw-r--r-- | include/alloca.h | 10 |
3 files changed, 15 insertions, 9 deletions
@@ -1,5 +1,11 @@ 2011-11-01 Andreas Schwab <schwab@linux-m68k.org> + * include/alloca.h (stackinfo_alloca_round): Define. + (extend_alloca): Use it. + [_STACK_GROWS_UP]: Correct check for adjacent allocation. + * elf/dl-deps.c (_dl_map_object_deps): Don't round alloca size + here. + * scripts/check-local-headers.sh: Ignore libaudit.h. * nscd/Makefile (extra-objs): Make recursively expanded. diff --git a/elf/dl-deps.c b/elf/dl-deps.c index a1ba3d1d32..565a339331 100644 --- a/elf/dl-deps.c +++ b/elf/dl-deps.c @@ -221,15 +221,11 @@ _dl_map_object_deps (struct link_map *map, if (l->l_searchlist.r_list == NULL && l->l_initfini == NULL && l != map && l->l_ldnum > 0) { - /* 16-align so extend_alloca has a chance to re-use the space. - Note that extend_alloca is broken for recent versions of GCC - on x86: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50938 */ - size_t new_size - = (l->l_ldnum * sizeof (struct link_map *) + 15) & ~15; + size_t new_size = l->l_ldnum * sizeof (struct link_map *); if (new_size > needed_space_bytes) needed_space - = extend_alloca (needed_space, needed_space_bytes, new_size); + = extend_alloca (needed_space, needed_space_bytes, new_size); needed = needed_space; } diff --git a/include/alloca.h b/include/alloca.h index 83504135f4..f741d25d54 100644 --- a/include/alloca.h +++ b/include/alloca.h @@ -20,9 +20,13 @@ libc_hidden_proto (__libc_alloca_cutoff) #include <allocalim.h> +#ifndef stackinfo_alloca_round +# define stackinfo_alloca_round(l) (((l) + 15) & -16) +#endif + #if _STACK_GROWS_DOWN # define extend_alloca(buf, len, newlen) \ - (__typeof (buf)) ({ size_t __newlen = (newlen); \ + (__typeof (buf)) ({ size_t __newlen = stackinfo_alloca_round (newlen); \ char *__newbuf = __alloca (__newlen); \ if (__newbuf + __newlen == (char *) buf) \ len += __newlen; \ @@ -31,10 +35,10 @@ libc_hidden_proto (__libc_alloca_cutoff) __newbuf; }) #elif _STACK_GROWS_UP # define extend_alloca(buf, len, newlen) \ - (__typeof (buf)) ({ size_t __newlen = (newlen); \ + (__typeof (buf)) ({ size_t __newlen = stackinfo_alloca_round (newlen); \ char *__newbuf = __alloca (__newlen); \ char *__buf = (buf); \ - if (__buf + __newlen == __newbuf) \ + if (__buf + len == __newbuf) \ { \ len += __newlen; \ __newbuf = __buf; \ |