diff options
| author | Mike Frysinger <vapier@gentoo.org> | 2009-11-23 21:35:34 -0500 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2009-11-23 21:35:34 -0500 |
| commit | 00673f93826bf1fbde728d202c319a684bb87150 (patch) | |
| tree | 2918312040781ebf7055ca83321605e7b110002d /ldso | |
| parent | c5bc75430dccfaef12220311aa4853176a8a911b (diff) | |
nommu: use MAP_UNINITIALIZE for mallocs
Now that the kernel supports MAP_UNINITIALIZE, have the malloc places use
it to get real uninitialized memory on no-mmu systems. This avoids a lot
of normally useless overhead involved in zeroing out all of the memory
(sometimes multiple times).
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'ldso')
| -rw-r--r-- | ldso/ldso/dl-elf.c | 2 | ||||
| -rw-r--r-- | ldso/ldso/ldso.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/ldso/ldso/dl-elf.c b/ldso/ldso/dl-elf.c index e7cb138d4..6bf5bbd6a 100644 --- a/ldso/ldso/dl-elf.c +++ b/ldso/ldso/dl-elf.c @@ -376,7 +376,7 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure, } } header = _dl_mmap((void *) 0, _dl_pagesize, PROT_READ | PROT_WRITE, - MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + MAP_PRIVATE | MAP_ANONYMOUS | MAP_UNINITIALIZE, -1, 0); if (_dl_mmap_check_error(header)) { _dl_dprintf(2, "%s:%i: can't map '%s'\n", _dl_progname, __LINE__, libname); _dl_internal_error_number = LD_ERROR_MMAP_FAILED; diff --git a/ldso/ldso/ldso.c b/ldso/ldso/ldso.c index 45d499574..01e707166 100644 --- a/ldso/ldso/ldso.c +++ b/ldso/ldso/ldso.c @@ -193,7 +193,7 @@ void *_dl_malloc(size_t size) _dl_debug_early("mmapping more memory\n"); _dl_mmap_zero = _dl_malloc_addr = _dl_mmap((void *) 0, rounded_size, - PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_UNINITIALIZE, -1, 0); if (_dl_mmap_check_error(_dl_mmap_zero)) { _dl_dprintf(_dl_debug_file, "%s: mmap of a spare page failed!\n", _dl_progname); _dl_exit(20); |