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| author | Rafael Ávila de Espíndola <rafael@espindo.la> | 2018-11-23 15:34:15 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2018-11-23 16:50:29 -0800 |
| commit | 1e8bdc3a2b3e8d6e26efd14d44ae71d21d8366fe (patch) | |
| tree | 7cf38f1dd13672c72fa85892ab6a3a8a9fbc3bce /sysdeps/unix/sysv/linux/sysdep.h | |
| parent | 1283c478aa0a9b3d84320db5745a61b7f61b360c (diff) | |
| download | glibc-1e8bdc3a2b3e8d6e26efd14d44ae71d21d8366fe.tar glibc-1e8bdc3a2b3e8d6e26efd14d44ae71d21d8366fe.tar.gz glibc-1e8bdc3a2b3e8d6e26efd14d44ae71d21d8366fe.tar.bz2 glibc-1e8bdc3a2b3e8d6e26efd14d44ae71d21d8366fe.zip | |
Enable VDSO on x86_64 statically linked programs [BZ #19767]
All the required code already existed, and some of it was already
running.
AT_SYSINFO_EHDR is processed if NEED_DL_SYSINFO_DSO is defined, but it
looks like it always is. The call to setup_vdso is also unconditional,
so all that was left to do was setup the function pointers and use
them. This patch just deletes some #ifdef to enable that.
[BZ #19767]
* nptl/Makefile (tests-static): Add tst-cond11-static.
(tests): Likewise.
* nptl/tst-cond11-static.c: New File.
* sysdeps/unix/sysv/linux/Makefile (tests-static): Add
tst-affinity-static.
(tests): Likewise.
* sysdeps/unix/sysv/linux/sysdep-vdso.h: Check USE_VSYSCALL
instead of SHARED.
* sysdeps/unix/sysv/linux/sysdep.h (ALWAYS_USE_VSYSCALL): New.
(USE_VSYSCALL): Likewise.
* sysdeps/unix/sysv/linux/tst-affinity-static.c: New file.
* sysdeps/unix/sysv/linux/x86/libc-vdso.h: Check USE_VSYSCALL
instead of SHARED.
* sysdeps/unix/sysv/linux/x86_64/init-first.c: Don't check
SHARED.
* sysdeps/unix/sysv/linux/x86_64/sysdep.h (ALWAYS_USE_VSYSCALL):
New.
Diffstat (limited to 'sysdeps/unix/sysv/linux/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/sysdep.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/sysdep.h b/sysdeps/unix/sysv/linux/sysdep.h index 4fd0a9bae3..9655436ee4 100644 --- a/sysdeps/unix/sysv/linux/sysdep.h +++ b/sysdeps/unix/sysv/linux/sysdep.h @@ -18,6 +18,13 @@ #include <bits/wordsize.h> #include <kernel-features.h> +/* By default only shared builds use vdso. */ +#ifndef ALWAYS_USE_VSYSCALL +#define ALWAYS_USE_VSYSCALL 0 +#endif + +#define USE_VSYSCALL (defined (SHARED) || ALWAYS_USE_VSYSCALL) + /* Set error number and return -1. A target may choose to return the internal function, __syscall_error, which sets errno and returns -1. We use -1l, instead of -1, so that it can be casted to (void *). */ |