diff options
| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2019-11-29 10:44:59 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2020-01-03 11:22:07 -0300 |
| commit | 1bdda52fe92fd01b424cd6fbb63e3df96a95015c (patch) | |
| tree | d25214e63bf5c96ab48c11ec0df28b5d96ca99da /csu | |
| parent | 57013650f7e796428ac2c0b7512757e99327bfc9 (diff) | |
| download | glibc-1bdda52fe92fd01b424cd6fbb63e3df96a95015c.tar.gz glibc-1bdda52fe92fd01b424cd6fbb63e3df96a95015c.tar.xz glibc-1bdda52fe92fd01b424cd6fbb63e3df96a95015c.zip | |
elf: Move vDSO setup to rtld (BZ#24967)
This patch moves the vDSO setup from libc to loader code, just after the vDSO link_map setup. For static case the initialization is moved to _dl_non_dynamic_init instead. Instead of using the mangled pointer, the vDSO data is set as attribute_relro (on _rtld_global_ro for shared or _dl_vdso_* for static). It is read-only even with partial relro. It fixes BZ#24967 now that the vDSO pointer is setup earlier than malloc interposition is called. Also, vDSO calls should not be a problem for static dlopen as indicated by BZ#20802. The vDSO pointer would be zero-initialized and the syscall will be issued instead. Checked on x86_64-linux-gnu, i686-linux-gnu, aarch64-linux-gnu, arm-linux-gnueabihf, powerpc64le-linux-gnu, powerpc64-linux-gnu, powerpc-linux-gnu, s390x-linux-gnu, sparc64-linux-gnu, and sparcv9-linux-gnu. I also run some tests on mips. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Diffstat (limited to 'csu')
| -rw-r--r-- | csu/init-first.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/csu/init-first.c b/csu/init-first.c index 669b779b70..1cd8a75098 100644 --- a/csu/init-first.c +++ b/csu/init-first.c @@ -74,10 +74,6 @@ _init (int argc, char **argv, char **envp) _dl_non_dynamic_init (); #endif -#ifdef VDSO_SETUP - VDSO_SETUP (); -#endif - __init_misc (argc, argv, envp); /* Initialize ctype data. */ |