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Consolidate vDSO macros and usage

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This patch consolidate the Linux vDSO define and usage across all ports
that uses it.  The common vDSO definitions and calling through
{INLINE/INTERNAL}_VSYSCALL macros are moved to a common header
sysdep-vdso.h and vDSO name declaration and prototype is defined
using a common macro.

Also PTR_{MANGLE,DEMANGLE} is added to ports that does not use them
for vDSO calls (aarch64, powerpc, s390, and tile) and thus it will
reflect in code changes.  For ports that already implement pointer
mangling/demangling in vDSO system (i386, x32, x86_64) this patch
is mainly a code refactor.

Checked on x32, x86_64, x32, ppc64le, and aarch64.
This commit is contained in:
Adhemerval Zanella
2015-04-17 10:58:31 -03:00
committed by Adhemerval Zanella
parent 829a679fac
commit f534255e4d
27 changed files with 409 additions and 552 deletions
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18
sysdeps/unix/sysv/linux/tile/init-first.c
View File

@ -19,21 +19,27 @@
#include <dl-vdso.h>
#include <libc-vdso.h>
struct syscall_return_value (*__vdso_gettimeofday) (struct timeval *, void *)
struct syscall_return_value (*VDSO_SYMBOL(gettimeofday)) (struct timeval *,
void *)
attribute_hidden;
struct syscall_return_value (*__vdso_clock_gettime) (clockid_t,
struct timespec *)
struct syscall_return_value (*VDSO_SYMBOL(clock_gettime)) (clockid_t,
struct timespec *)
__attribute__ ((nocommon));
strong_alias (__vdso_clock_gettime, __GI___vdso_clock_gettime attribute_hidden)
static inline void
_libc_vdso_platform_setup (void)
{
PREPARE_VERSION (linux26, "LINUX_2.6", 61765110);
__vdso_gettimeofday = _dl_vdso_vsym ("__vdso_gettimeofday", &linux26);
__vdso_clock_gettime = _dl_vdso_vsym ("__vdso_clock_gettime", &linux26);
void *p = _dl_vdso_vsym ("__vdso_gettimeofday", &linux26);
PTR_MANGLE (p);
VDSO_SYMBOL (gettimeofday) = p;
p = _dl_vdso_vsym ("__vdso_clock_gettime", &linux26);
PTR_MANGLE (p);
VDSO_SYMBOL (clock_gettime) = p;
}
#define VDSO_SETUP _libc_vdso_platform_setup