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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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23
sysdeps/unix/sysv/linux/clock_gettime.c
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@ -21,23 +21,10 @@
#include <time.h>
#include "kernel-posix-cpu-timers.h"
#ifndef HAVE_CLOCK_GETTIME_VSYSCALL
# undef INTERNAL_VSYSCALL
# define INTERNAL_VSYSCALL INTERNAL_SYSCALL
# undef INLINE_VSYSCALL
# define INLINE_VSYSCALL INLINE_SYSCALL
#else
# include <libc-vdso.h>
#endif
#ifndef SYSCALL_GETTIME
# define SYSCALL_GETTIME(id, tp) \
INLINE_VSYSCALL (clock_gettime, 2, id, tp)
#endif
#ifndef INTERNAL_GETTIME
# define INTERNAL_GETTIME(id, tp) \
INTERNAL_VSYSCALL (clock_gettime, err, 2, id, tp)
#ifdef HAVE_CLOCK_GETTIME_VSYSCALL
# define HAVE_VSYSCALL
#endif
#include <sysdep-vdso.h>
/* The REALTIME and MONOTONIC clock are definitely supported in the
kernel. */
@ -45,7 +32,7 @@
SYSDEP_GETTIME_CPUTIME; \
case CLOCK_REALTIME: \
case CLOCK_MONOTONIC: \
retval = SYSCALL_GETTIME (clock_id, tp); \
retval = INLINE_VSYSCALL (clock_gettime, 2, clock_id, tp); \
break
/* We handled the REALTIME clock here. */
@ -53,7 +40,7 @@
#define HANDLED_CPUTIME 1
#define SYSDEP_GETTIME_CPU(clock_id, tp) \
retval = SYSCALL_GETTIME (clock_id, tp); \
retval = INLINE_VSYSCALL (clock_gettime, 2, clock_id, tp); \
break
#define SYSDEP_GETTIME_CPUTIME /* Default catches them too. */