AuroraMiddleware/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2024-09-21 00:50:04 +00:00
Code Issues Packages Projects Releases Wiki Activity

Consolidate vDSO macros and usage

Browse Source 
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

121
ChangeLog
View File

@ -1,3 +1,124 @@
2015-05-26 Adhemerval Zanella <adhemerval.zanella@linaro.org>
* sysdeps/unix/sysv/linux/aarch64/gettimeofday.c (HAVE_VSYSCALL):
Define and include sysdep-vdso.h.
* sysdeps/unix/sysv/linux/s390/gettimeofday.c (HAVE_VSYSCALL):
Likewise.
* sysdeps/unix/sysv/linux/tile/gettimeofday.c (HAVE_VSYSCALL):
Likewise.
* sysdeps/unix/sysv/linux/aarch64/init-first.c (__vdso_gettimeofday):
Define with VDSO_SYMBOL and use PTR_MANGLE.
(__vdso_clock_gettime): Likewise.
(__vdso_clock_getres): Likewise.
(_libc_vdso_platform_setup): Likewise.
* sysdeps/unix/sysv/linux/i386/init-first.c (__vdso_clock_gettime):
Likewise.
(_libc_vdso_platform_setup): Likewise.
* sysdeps/unix/sysv/linux/powerpc/init-first.c (__vdso_gettimeofday):
Likewise.
(__vdso_clock_gettime): Likewise.
(__vdso_clock_getres): Likewise.
(__vdso_get_tbfreq): Likewise.
(__vdso_getcpu): Likewise.
(__vdso_time): Likewise.
(__vdso_sigtramp_rt64): Likewise.
(__vdso_signtramp32): Likewise.
(__vdso_sigtramp_rt32): Likewise.
(_libc_vdso_platform_setup): Likewise.
* sysdeps/unix/sysv/linux/s390/init-first.c (__vdso_gettimeofay):
Likewise.
(__vdso_clock_gettime): Likewise.
(__vdso_clock_getres): Likewise.
(_libc_vdso_platform_setup): Likewise.
* sysdeps/unix/sysv/linux/tile/init-first.c (__vdso_gettimeofday):
Likewise.
(__vdso_clock_gettime): Likewise.
(_libc_vdso_platform_setup): Likewise.
* sysdeps/unix/sysv/linux/x86_64/init-first.c (__vdso_clock_gettime):
Likewise.
(__vdso_getcpu): Likewise.
* sysdeps/unix/sysv/linux/aarch64/libc-vdso.h (__vdso_gettimeoday):
Use VDSO_SYMBOL macro to define.
(__vdso_clock_gettime): Likewise.
(__vdso_clock_getres): Likewise.
* sysdeps/unix/sysv/linux/powerpc/libc-vdso.h (__vdso_gettimeofday):
Likewise.
(__vdso_clock_gettime): Likewise.
(__vdso_clock_getres): Likewise.
(__vdso_get_tbfreq): Likewise.
(__vdso_getcpu): Likewise.
(__vdso_time): Likewise.
(__vdso_sigtramp_rt64): Likewise.
(__vdso_signtramp32): Likewise.
(__vdso_sigtramp_rt32): Likewise.
* sysdeps/unix/sysv/linux/s390/libc-vdso.h (__vdso_gettimeofday):
Likewise.
(__vdso_clock_gettime): Likewise.
(__vdso_clock_getres): Likewise.
* sysdeps/unix/sysv/linux/tile/libc-vdso.h (__vdso_gettimeofday):
Likewise.
(__vdso_clock_gettime): Likewise.
* sysdeps/unix/sysv/linux/x86/libc-vdso.h (__vdso_clock_gettime):
Likewise.
* sysdeps/unix/sysv/linux/aarch64/sysdep.h (INLINE_VSYSCALL): Remove
macro.
(INTERNAL_VSYSCALL): Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h (INLINE_VSYSCALL):
Remove macro.
(INTERNAL_VSYSCALL): Likewise.
(INTERNAL_VSYSCALL_NCS): Likewise.
(INTERNAL_VSYSCALL_CALL): New macro.
(INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK): Use PTR_DEMANGLE.
* sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h (INLINE_VSYSCALL):
Likewise.
(INTERNAL_VSYSCALL): Likewise.
(INTERNAL_VSYSCALL_NCS): Likewise.
(INTERNAL_VSYSCALL_CALL): New macro.
(INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK): Use PTR_DEMANGLE.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h
(INLINE_VSYSCALL): Remove macro.
(INTERNAL_VSYSCALL): Remove macro.
(INTERNAL_VSYSCALL_NCS): Remove macro.
(INTERNAL_VSYSCALL_CALL): New macro.
(INTERNAL_VSYSCALL_CALL_TYPE): New macro.
(INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK): Use INTERNAL_VSYSCALL_CALL.
(INTERNAL_VSYSCALL_NCS_TYPE): Likewise.
(HAVE_CLOCK_GETRES_VSYSCALL): New define.
(HAVE_CLOCK_GETTIME_VSYSCALL): Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h
(INLINE_VSYSCALL): Remove macro.
(INTERNAL_VSYSCALL): Likewise.
(INTERNAL_VSYSCALL_NCS): Likewise.
(INTERNAL_VSYSCALL_CALL): New macro.
(INTERNAL_VSYSCALL_CALL_TYPE): Likewise.
(INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK): Use INTERNAL_VSYSCALL_CALL and
PTR_DEMANGLE on vDSO pointer.
(INTERNAL_VSYSCALL_NCS_TYPE): Likewise.
* sysdeps/unix/sysv/linux/tile/sysdep.h (INLINE_VSYSCALL): Remove
macro.
(INTERNAL_SYSCALL): Likewise.
(INTERNAL_VSYSCALL_NCS): Remove macro.
(INTERNAL_VSYSCALL_CALL): New macro.
* sysdeps/unix/sysv/linux/x86_64/sysdep.h (INLINE_VSYSCALL):
Remove macro.
(INTERNAL_VSYSCALL): Likewise.
* sysdeps/unix/sysv/linux/powerpc/sched_getcpu.c: Include
sysdep-vdso.h instead of libc-vdso.h.
* sysdeps/unix/sysv/linux/clock_getres.c (INTERNAL_VSYSCALL): Remove
definition.
(INLINE_VSYSCALL): Likewise.
(HAVE_VSYSCALL) [HAVE_CLOCK_GETRES_VSYSCALL]: Define.
* sysdeps/unix/sysv/linux/clock_gettime.c (INTERNAL_VSYSCALL): Remove
definition.
(INLINE_VSYSCALL): Likewise.
(INTERNAL_VSYSCALL): Likewise.
(HAVE_VSYSCALL) [HAVE_CLOCK_GETTIME_VSYSCALL]: Define.
* sysdeps/unix/sysv/linux/timespec_get.c
(INTERNAL_VSYSCALL) [HAVE_CLOCK_GETTIME_VSYSCALL]: Define.
(timespec_get): Use ANSI prototype.
* sysdeps/unix/sysv/linux/sysdep-vdso.h: New file: default vDSO macros
and definition for Linux.
2015-05-25 Andrew Senkevich <andrew.senkevich@intel.com>
* elf/Makefile (localplt-built-dso): libmvec added to localplt test.

3
sysdeps/unix/sysv/linux/aarch64/gettimeofday.c
View File

@ -21,7 +21,8 @@
#undef __gettimeofday
#include <libc-vdso.h>
#define HAVE_VSYSCALL
#include <sysdep-vdso.h>
/* Get the current time of day and timezone information,
putting it into *tv and *tz. If tz is null, *tz is not filled.

20
sysdeps/unix/sysv/linux/aarch64/init-first.c
View File

@ -23,18 +23,26 @@
# undef __clock_getres
# include <libc-vdso.h>
void (*__vdso_gettimeofday) (struct timeval *, void *) attribute_hidden;
void (*__vdso_clock_gettime) (clockid_t, struct timespec *);
void (*__vdso_clock_getres) (clockid_t, struct timespec *);
int (*VDSO_SYMBOL(gettimeofday)) (struct timeval *, void *) attribute_hidden;
int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *);
int (*VDSO_SYMBOL(clock_getres)) (clockid_t, struct timespec *);
static inline void
_libc_vdso_platform_setup (void)
{
PREPARE_VERSION (linux2639, "LINUX_2.6.39", 123718537);
__vdso_gettimeofday = _dl_vdso_vsym ("__kernel_gettimeofday", &linux2639);
__vdso_clock_gettime = _dl_vdso_vsym ("__kernel_clock_gettime", &linux2639);
__vdso_clock_getres = _dl_vdso_vsym ("__kernel_clock_getres", &linux2639);
void *p = _dl_vdso_vsym ("__kernel_gettimeofday", &linux2639);
PTR_MANGLE (p);
VDSO_SYMBOL(gettimeofday) = p;
p = _dl_vdso_vsym ("__kernel_clock_gettime", &linux2639);
PTR_MANGLE (p);
VDSO_SYMBOL(clock_gettime) = p;
p = _dl_vdso_vsym ("__kernel_clock_getres", &linux2639);
PTR_MANGLE (p);
VDSO_SYMBOL(clock_getres) = p;
}
# define VDSO_SETUP _libc_vdso_platform_setup

8
sysdeps/unix/sysv/linux/aarch64/libc-vdso.h
View File

@ -21,10 +21,12 @@
#ifdef SHARED
extern void (*__vdso_gettimeofday) (struct timeval *, void *)
# include <sysdep-vdso.h>
extern int (*VDSO_SYMBOL(gettimeofday)) (struct timeval *, void *)
attribute_hidden;
extern void (*__vdso_clock_gettime) (clockid_t, struct timespec *);
extern void (*__vdso_clock_getres) (clockid_t, struct timespec *);
extern int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *);
extern int (*VDSO_SYMBOL(clock_getres)) (clockid_t, struct timespec *);
#endif

64
sysdeps/unix/sysv/linux/aarch64/sysdep.h
View File

@ -151,75 +151,11 @@
#else /* not __ASSEMBLER__ */
# ifdef SHARED
# define INLINE_VSYSCALL(name, nr, args...) \
({ \
__label__ out; \
__label__ iserr; \
long sc_ret; \
INTERNAL_SYSCALL_DECL (sc_err); \
\
if (__vdso_##name != NULL) \
{ \
sc_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, sc_err, nr, ##args); \
if (!INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
goto out; \
if (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err) != ENOSYS) \
goto iserr; \
} \
\
sc_ret = INTERNAL_SYSCALL (name, sc_err, nr, ##args); \
if (INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
{ \
iserr: \
__set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err)); \
sc_ret = -1L; \
} \
out: \
sc_ret; \
})
# else
# define INLINE_VSYSCALL(name, nr, args...) \
INLINE_SYSCALL (name, nr, ##args)
# endif
# ifdef SHARED
# define INTERNAL_VSYSCALL(name, err, nr, args...) \
({ \
__label__ out; \
long v_ret; \
\
if (__vdso_##name != NULL) \
{ \
v_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, nr, ##args); \
if (!INTERNAL_SYSCALL_ERROR_P (v_ret, err) \
|| INTERNAL_SYSCALL_ERRNO (v_ret, err) != ENOSYS) \
goto out; \
} \
v_ret = INTERNAL_SYSCALL (name, err, nr, ##args); \
out: \
v_ret; \
})
# else
# define INTERNAL_VSYSCALL(name, err, nr, args...) \
INTERNAL_SYSCALL (name, err, nr, ##args)
# endif
/* List of system calls which are supported as vsyscalls. */
# define HAVE_CLOCK_GETRES_VSYSCALL 1
# define HAVE_CLOCK_GETTIME_VSYSCALL 1
# define INTERNAL_VSYSCALL_NCS(funcptr, err, nr, args...) \
({ \
LOAD_ARGS_##nr (args) \
asm volatile ("blr %1" \
: "=r" (_x0) \
: "r" (funcptr) ASM_ARGS_##nr \
: "x30", "memory"); \
(long) _x0; \
})
/* Define a macro which expands into the inline wrapper code for a system
call. */
# undef INLINE_SYSCALL

10
sysdeps/unix/sysv/linux/clock_getres.c
View File

@ -21,14 +21,10 @@
#include <time.h>
#include "kernel-posix-cpu-timers.h"
#ifndef HAVE_CLOCK_GETRES_VSYSCALL
# undef INTERNAL_VSYSCALL
# define INTERNAL_VSYSCALL INTERNAL_SYSCALL
# undef INLINE_VSYSCALL
# define INLINE_VSYSCALL INLINE_SYSCALL
#else
# include <libc-vdso.h>
#ifdef HAVE_CLOCK_GETRES_VSYSCALL
# define HAVE_VSYSCALL
#endif
#include <sysdep-vdso.h>
#define SYSCALL_GETRES \
retval = INLINE_VSYSCALL (clock_getres, 2, clock_id, res); \

23
sysdeps/unix/sysv/linux/clock_gettime.c
View File

@ -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. */

6
sysdeps/unix/sysv/linux/i386/init-first.c
View File

@ -20,9 +20,9 @@
# include <time.h>
# include <sysdep.h>
# include <dl-vdso.h>
# include <libc-vdso.h>
# include <sysdep-vdso.h>
long int (*__vdso_clock_gettime) (clockid_t, struct timespec *)
long int (*VDSO_SYMBOL (clock_gettime)) (clockid_t, struct timespec *)
attribute_hidden;
static long int
@ -41,7 +41,7 @@ __vdso_platform_setup (void)
if (p == NULL)
p = clock_gettime_syscall;
PTR_MANGLE (p);
__vdso_clock_gettime = p;
VDSO_SYMBOL (clock_gettime) = p;
}
# define VDSO_SETUP __vdso_platform_setup

56
sysdeps/unix/sysv/linux/powerpc/init-first.c
View File

@ -23,17 +23,19 @@
# undef __clock_getres
# include <libc-vdso.h>
void *__vdso_gettimeofday attribute_hidden;
void *__vdso_clock_gettime;
void *__vdso_clock_getres;
void *__vdso_get_tbfreq;
void *__vdso_getcpu;
void *__vdso_time;
int (*VDSO_SYMBOL(gettimeofday)) (struct timeval *, void *)
attribute_hidden;
int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *);
int (*VDSO_SYMBOL(clock_getres)) (clockid_t, struct timespec *);
unsigned long long (*VDSO_SYMBOL(get_tbfreq)) (void);
int (*VDSO_SYMBOL(getcpu)) (unsigned *, unsigned *);
time_t (*VDSO_SYMBOL(time)) (time_t *);
#if defined(__PPC64__) || defined(__powerpc64__)
void *__vdso_sigtramp_rt64;
void *VDSO_SYMBOL(sigtramp_rt64);
#else
void *__vdso_sigtramp32;
void *__vdso_sigtramp_rt32;
void *VDSO_SYMBOL(sigtramp32);
void *VDSO_SYMBOL(sigtramp_rt32);
#endif
static inline void
@ -41,26 +43,42 @@ _libc_vdso_platform_setup (void)
{
PREPARE_VERSION (linux2615, "LINUX_2.6.15", 123718565);
__vdso_gettimeofday = _dl_vdso_vsym ("__kernel_gettimeofday", &linux2615);
void *p = _dl_vdso_vsym ("__kernel_gettimeofday", &linux2615);
PTR_MANGLE (p);
VDSO_SYMBOL (gettimeofday) = p;
__vdso_clock_gettime = _dl_vdso_vsym ("__kernel_clock_gettime", &linux2615);
p = _dl_vdso_vsym ("__kernel_clock_gettime", &linux2615);
PTR_MANGLE (p);
VDSO_SYMBOL (clock_gettime) = p;
__vdso_clock_getres = _dl_vdso_vsym ("__kernel_clock_getres", &linux2615);
p = _dl_vdso_vsym ("__kernel_clock_getres", &linux2615);
PTR_MANGLE (p);
VDSO_SYMBOL (clock_getres) = p;
__vdso_get_tbfreq = _dl_vdso_vsym ("__kernel_get_tbfreq", &linux2615);
p = _dl_vdso_vsym ("__kernel_get_tbfreq", &linux2615);
PTR_MANGLE (p);
VDSO_SYMBOL (get_tbfreq) = p;
__vdso_getcpu = _dl_vdso_vsym ("__kernel_getcpu", &linux2615);
p = _dl_vdso_vsym ("__kernel_getcpu", &linux2615);
PTR_MANGLE (p);
VDSO_SYMBOL (getcpu) = p;
__vdso_time = _dl_vdso_vsym ("__kernel_time", &linux2615);
p = _dl_vdso_vsym ("__kernel_time", &linux2615);
PTR_MANGLE (p);
VDSO_SYMBOL (time) = p;
/* PPC64 uses only one signal trampoline symbol, while PPC32 will use
two depending if SA_SIGINFO is used (__kernel_sigtramp_rt32) or not
(__kernel_sigtramp32). */
(__kernel_sigtramp32).
There is no need to pointer mangle these symbol because they will
used only for pointer comparison. */
#if defined(__PPC64__) || defined(__powerpc64__)
__vdso_sigtramp_rt64 = _dl_vdso_vsym ("__kernel_sigtramp_rt64", &linux2615);
VDSO_SYMBOL(sigtramp_rt64) = _dl_vdso_vsym ("__kernel_sigtramp_rt64",
&linux2615);
#else
__vdso_sigtramp32 = _dl_vdso_vsym ("__kernel_sigtramp32", &linux2615);
__vdso_sigtramp_rt32 = _dl_vdso_vsym ("__kernel_sigtramp_rt32", &linux2615);
VDSO_SYMBOL(sigtramp32) = _dl_vdso_vsym ("__kernel_sigtramp32", &linux2615);
VDSO_SYMBOL(sigtramp_rt32) = _dl_vdso_vsym ("__kernel_sigtramp_rt32",
&linux2615);
#endif
}

24
sysdeps/unix/sysv/linux/powerpc/libc-vdso.h
View File

@ -22,23 +22,21 @@
#ifdef SHARED
extern void *__vdso_gettimeofday attribute_hidden;
#include <sysdep-vdso.h>
extern void *__vdso_clock_gettime;
extern void *__vdso_clock_getres;
extern void *__vdso_get_tbfreq;
extern void *__vdso_getcpu;
extern void *__vdso_time;
extern int (*VDSO_SYMBOL(gettimeofday)) (struct timeval *, void *)
attribute_hidden;
extern int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *);
extern int (*VDSO_SYMBOL(clock_getres)) (clockid_t, struct timespec *);
extern unsigned long long (*VDSO_SYMBOL(get_tbfreq)) (void);
extern int (*VDSO_SYMBOL(getcpu)) (unsigned *, unsigned *);
extern time_t (*VDSO_SYMBOL(time)) (time_t *);
#if defined(__PPC64__) || defined(__powerpc64__)
extern void *__vdso_sigtramp_rt64;
extern void *VDSO_SYMBOL(sigtramp_rt64);
#else
extern void *__vdso_sigtramp32;
extern void *__vdso_sigtramp_rt32;
extern void *VDSO_SYMBOL(sigtramp32);
extern void *VDSO_SYMBOL(sigtramp_rt32);
#endif
#if (defined(__PPC64__) || defined(__powerpc64__)) && _CALL_ELF != 2

95
sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h
View File

@ -50,77 +50,6 @@
# include <errno.h>
# ifdef SHARED
# define INLINE_VSYSCALL(name, nr, args...) \
({ \
__label__ out; \
__label__ iserr; \
INTERNAL_SYSCALL_DECL (sc_err); \
long int sc_ret; \
\
if (__vdso_##name != NULL) \
{ \
sc_ret = \
INTERNAL_VSYSCALL_NCS (__vdso_##name, sc_err, long int, nr, ##args);\
if (!INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
goto out; \
if (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err) != ENOSYS) \
goto iserr; \
} \
\
sc_ret = INTERNAL_SYSCALL (name, sc_err, nr, ##args); \
if (INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
{ \
iserr: \
__set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err)); \
sc_ret = -1L; \
} \
out: \
sc_ret; \
})
# else
# define INLINE_VSYSCALL(name, nr, args...) \
INLINE_SYSCALL (name, nr, ##args)
# endif
# ifdef SHARED
# define INTERNAL_VSYSCALL(name, err, nr, args...) \
({ \
__label__ out; \
long int v_ret; \
\
if (__vdso_##name != NULL) \
{ \
v_ret = \
INTERNAL_VSYSCALL_NCS (__vdso_##name, err, long int, nr, ##args); \
if (!INTERNAL_SYSCALL_ERROR_P (v_ret, err) \
|| INTERNAL_SYSCALL_ERRNO (v_ret, err) != ENOSYS) \
goto out; \
} \
v_ret = INTERNAL_SYSCALL (name, err, nr, ##args); \
out: \
v_ret; \
})
# else
# define INTERNAL_VSYSCALL(name, err, nr, args...) \
INTERNAL_SYSCALL (name, err, nr, ##args)
# endif
# define INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK(name, err, type, nr, args...) \
({ \
type sc_ret = ENOSYS; \
\
if (__vdso_##name != NULL) \
sc_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, type, nr, ##args); \
else \
err = 1 << 28; \
sc_ret; \
})
/* List of system calls which are supported as vsyscalls. */
# define HAVE_CLOCK_GETRES_VSYSCALL 1
# define HAVE_CLOCK_GETTIME_VSYSCALL 1
/* Define a macro which expands inline into the wrapper code for a VDSO
call. This use is for internal calls that do not need to handle errors
normally. It will never touch errno.
@ -128,7 +57,7 @@
function call, with the exception of LR (which is needed for the
"sc; bnslr+" sequence) and CR (where only CR0.SO is clobbered to signal
an error return status). */
# define INTERNAL_VSYSCALL_NCS(funcptr, err, type, nr, args...) \
# define INTERNAL_VSYSCALL_CALL_TYPE(funcptr, err, nr, type, args...) \
({ \
register void *r0 __asm__ ("r0"); \
register long int r3 __asm__ ("r3"); \
@ -155,6 +84,9 @@
rval; \
})
#define INTERNAL_VSYSCALL_CALL(funcptr, err, nr, args...) \
INTERNAL_VSYSCALL_CALL_TYPE(funcptr, err, nr, long int, args)
# undef INLINE_SYSCALL
# define INLINE_SYSCALL(name, nr, args...) \
({ \
@ -216,6 +148,25 @@
# undef INTERNAL_SYSCALL_ERRNO
# define INTERNAL_SYSCALL_ERRNO(val, err) (val)
# define INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK(name, err, type, nr, args...) \
({ \
type sc_ret = ENOSYS; \
\
__typeof (__vdso_##name) vdsop = __vdso_##name; \
PTR_DEMANGLE (vdsop); \
if (vdsop != NULL) \
sc_ret = \
INTERNAL_VSYSCALL_CALL_TYPE (vdsop, err, nr, type, ##args); \
else \
err = 1 << 28; \
sc_ret; \
})
/* List of system calls which are supported as vsyscalls. */
# define HAVE_CLOCK_GETRES_VSYSCALL 1
# define HAVE_CLOCK_GETTIME_VSYSCALL 1
# define LOADARGS_0(name, dummy) \
r0 = name
# define LOADARGS_1(name, __arg1) \

72
sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h
View File

@ -61,74 +61,17 @@
#endif /* __ASSEMBLER__ */
/* This version is for kernels that implement system calls that
behave like function calls as far as register saving.
It falls back to the syscall in the case that the vDSO doesn't
exist or fails for ENOSYS */
#ifdef SHARED
# define INLINE_VSYSCALL(name, nr, args...) \
({ \
__label__ out; \
__label__ iserr; \
INTERNAL_SYSCALL_DECL (sc_err); \
long int sc_ret; \
\
if (__vdso_##name != NULL) \
{ \
sc_ret = \
INTERNAL_VSYSCALL_NCS (__vdso_##name, sc_err, long int, nr, ##args);\
if (!INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
goto out; \
if (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err) != ENOSYS) \
goto iserr; \
} \
\
sc_ret = INTERNAL_SYSCALL (name, sc_err, nr, ##args); \
if (INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
{ \
iserr: \
__set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err)); \
sc_ret = -1L; \
} \
out: \
sc_ret; \
})
#else
# define INLINE_VSYSCALL(name, nr, args...) \
INLINE_SYSCALL (name, nr, ##args)
#endif
#ifdef SHARED
# define INTERNAL_VSYSCALL(name, err, nr, args...) \
({ \
__label__ out; \
long int v_ret; \
\
if (__vdso_##name != NULL) \
{ \
v_ret = \
INTERNAL_VSYSCALL_NCS (__vdso_##name, err, long int, nr, ##args); \
if (!INTERNAL_SYSCALL_ERROR_P (v_ret, err) \
|| INTERNAL_SYSCALL_ERRNO (v_ret, err) != ENOSYS) \
goto out; \
} \
v_ret = INTERNAL_SYSCALL (name, err, nr, ##args); \
out: \
v_ret; \
})
#else
# define INTERNAL_VSYSCALL(name, err, nr, args...) \
INTERNAL_SYSCALL (name, err, nr, ##args)
#endif
/* This version is for internal uses when there is no desire
to set errno */
#define INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK(name, err, type, nr, args...) \
({ \
type sc_ret = ENOSYS; \
\
if (__vdso_##name != NULL) \
sc_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, type, nr, ##args); \
__typeof (__vdso_##name) vdsop = __vdso_##name; \
PTR_DEMANGLE (vdsop); \
if (vdsop != NULL) \
sc_ret = \
INTERNAL_VSYSCALL_CALL_TYPE (vdsop, err, type, nr, ##args); \
else \
err = 1 << 28; \
sc_ret; \
@ -144,7 +87,7 @@
gave back in the non-error (CR0.SO cleared) case, otherwise (CR0.SO set)
the negation of the return value in the kernel gets reverted. */
#define INTERNAL_VSYSCALL_NCS(funcptr, err, type, nr, args...) \
#define INTERNAL_VSYSCALL_CALL_TYPE(funcptr, err, type, nr, args...) \
({ \
register void *r0 __asm__ ("r0"); \
register long int r3 __asm__ ("r3"); \
@ -168,6 +111,9 @@
rval; \
})
#define INTERNAL_VSYSCALL_CALL(funcptr, err, nr, args...) \
INTERNAL_VSYSCALL_CALL_TYPE(funcptr, err, long int, nr, args)
#undef INLINE_SYSCALL
/* This version is for kernels that implement system calls that

3
sysdeps/unix/sysv/linux/powerpc/sched_getcpu.c
View File

@ -17,8 +17,7 @@
#include <sched.h>
#include <sysdep.h>
#include <libc-vdso.h>
#include <sysdep-vdso.h>
int
sched_getcpu (void)

3
sysdeps/unix/sysv/linux/s390/gettimeofday.c
View File

@ -21,7 +21,8 @@
#include <time.h>
#include <hp-timing.h>
#include <libc-vdso.h>
#define HAVE_VSYSCALL
#include <sysdep-vdso.h>
/* Get the current time of day and timezone information,
putting it into *TV and *TZ. If TZ is NULL, *TZ is not filled.

23
sysdeps/unix/sysv/linux/s390/init-first.c
View File

@ -23,15 +23,14 @@
# undef __clock_getres
# include <libc-vdso.h>
long int (*__vdso_gettimeofday) (struct timeval *, void *) attribute_hidden;
long int (*VDSO_SYMBOL(gettimeofday)) (struct timeval *, void *)
attribute_hidden;
long int (*__vdso_clock_gettime) (clockid_t, struct timespec *)
long int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *)
__attribute__ ((nocommon));
strong_alias (__vdso_clock_gettime, __GI___vdso_clock_gettime attribute_hidden)
long int (*__vdso_clock_getres) (clockid_t, struct timespec *)
long int (*VDSO_SYMBOL(clock_getres)) (clockid_t, struct timespec *)
__attribute__ ((nocommon));
strong_alias (__vdso_clock_getres, __GI___vdso_clock_getres attribute_hidden)
static inline void
@ -39,9 +38,17 @@ _libc_vdso_platform_setup (void)
{
PREPARE_VERSION (linux2629, "LINUX_2.6.29", 123718585);
__vdso_gettimeofday = _dl_vdso_vsym ("__kernel_gettimeofday", &linux2629);
__vdso_clock_gettime = _dl_vdso_vsym ("__kernel_clock_gettime", &linux2629);
__vdso_clock_getres = _dl_vdso_vsym ("__kernel_clock_getres", &linux2629);
void *p = _dl_vdso_vsym ("__kernel_gettimeofday", &linux2629);
PTR_MANGLE (p);
VDSO_SYMBOL (gettimeofday) = p;
p = _dl_vdso_vsym ("__kernel_clock_gettime", &linux2629);
PTR_MANGLE (p);
VDSO_SYMBOL (clock_gettime) = p;
p = _dl_vdso_vsym ("__kernel_clock_getres", &linux2629);
PTR_MANGLE (p);
VDSO_SYMBOL (clock_getres) = p;
}
# define VDSO_SETUP _libc_vdso_platform_setup

10
sysdeps/unix/sysv/linux/s390/libc-vdso.h
View File

@ -22,12 +22,14 @@
#ifdef SHARED
extern long int (*__vdso_gettimeofday) (struct timeval *, void *)
attribute_hidden;
#include <sysdep-vdso.h>
extern long int (*__vdso_clock_gettime) (clockid_t, struct timespec *);
extern long int (*VDSO_SYMBOL(gettimeofday)) (struct timeval *, void *)
attribute_hidden;
extern long int (*__vdso_clock_getres) (clockid_t, struct timespec *);
extern long int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *);
extern long int (*VDSO_SYMBOL(clock_getres)) (clockid_t, struct timespec *);
#endif

65
sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h
View File

@ -282,77 +282,22 @@
#define HAVE_CLOCK_GETRES_VSYSCALL 1
#define HAVE_CLOCK_GETTIME_VSYSCALL 1
/* This version is for kernels that implement system calls that
behave like function calls as far as register saving.
It falls back to the syscall in the case that the vDSO doesn't
exist or fails for ENOSYS */
#ifdef SHARED
# define INLINE_VSYSCALL(name, nr, args...) \
({ \
__label__ out; \
__label__ iserr; \
long int _ret; \
\
if (__vdso_##name != NULL) \
{ \
_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, , nr, ##args); \
if (!INTERNAL_SYSCALL_ERROR_P (_ret, )) \
goto out; \
if (INTERNAL_SYSCALL_ERRNO (_ret, ) != ENOSYS) \
goto iserr; \
} \
\
_ret = INTERNAL_SYSCALL (name, , nr, ##args); \
if (INTERNAL_SYSCALL_ERROR_P (_ret, )) \
{ \
iserr: \
__set_errno (INTERNAL_SYSCALL_ERRNO (_ret, )); \
_ret = -1L; \
} \
out: \
(int) _ret; \
})
#else
# define INLINE_VSYSCALL(name, nr, args...) \
INLINE_SYSCALL (name, nr, ##args)
#endif
#ifdef SHARED
# define INTERNAL_VSYSCALL(name, err, nr, args...) \
({ \
__label__ out; \
long int _ret; \
\
if (__vdso_##name != NULL) \
{ \
_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, nr, ##args); \
if (!INTERNAL_SYSCALL_ERROR_P (_ret, err) \
|| INTERNAL_SYSCALL_ERRNO (_ret, err) != ENOSYS) \
goto out; \
} \
_ret = INTERNAL_SYSCALL (name, err, nr, ##args); \
out: \
_ret; \
})
#else
# define INTERNAL_VSYSCALL(name, err, nr, args...) \
INTERNAL_SYSCALL (name, err, nr, ##args)
#endif
/* This version is for internal uses when there is no desire
to set errno */
#define INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK(name, err, nr, args...) \
({ \
long int _ret = ENOSYS; \
\
if (__vdso_##name != NULL) \
_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, nr, ##args); \
__typeof (__vdso_##name) vdsop = __vdso_##name; \
PTR_DEMANGLE (vdsop); \
if (vdsop != NULL) \
_ret = INTERNAL_VSYSCALL_CALL (vdsop, err, nr, ##args); \
else \
err = 1 << 28; \
_ret; \
})
#define INTERNAL_VSYSCALL_NCS(fn, err, nr, args...) \
#define INTERNAL_VSYSCALL_CALL(fn, err, nr, args...) \
({ \
DECLARGS_##nr(args) \
register long _ret asm("2"); \

65
sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h
View File

@ -288,77 +288,22 @@
#define HAVE_CLOCK_GETRES_VSYSCALL 1
#define HAVE_CLOCK_GETTIME_VSYSCALL 1
/* This version is for kernels that implement system calls that
behave like function calls as far as register saving.
It falls back to the syscall in the case that the vDSO doesn't
exist or fails for ENOSYS */
#ifdef SHARED
# define INLINE_VSYSCALL(name, nr, args...) \
({ \
__label__ out; \
__label__ iserr; \
long int _ret; \
\
if (__vdso_##name != NULL) \
{ \
_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, , nr, ##args); \
if (!INTERNAL_SYSCALL_ERROR_P (_ret, )) \
goto out; \
if (INTERNAL_SYSCALL_ERRNO (_ret, ) != ENOSYS) \
goto iserr; \
} \
\
_ret = INTERNAL_SYSCALL (name, , nr, ##args); \
if (INTERNAL_SYSCALL_ERROR_P (_ret, )) \
{ \
iserr: \
__set_errno (INTERNAL_SYSCALL_ERRNO (_ret, )); \
_ret = -1L; \
} \
out: \
(int) _ret; \
})
#else
# define INLINE_VSYSCALL(name, nr, args...) \
INLINE_SYSCALL (name, nr, ##args)
#endif
#ifdef SHARED
# define INTERNAL_VSYSCALL(name, err, nr, args...) \
({ \
__label__ out; \
long int _ret; \
\
if (__vdso_##name != NULL) \
{ \
_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, nr, ##args); \
if (!INTERNAL_SYSCALL_ERROR_P (_ret, err) \
|| INTERNAL_SYSCALL_ERRNO (_ret, err) != ENOSYS) \
goto out; \
} \
_ret = INTERNAL_SYSCALL (name, err, nr, ##args); \
out: \
_ret; \
})
#else
# define INTERNAL_VSYSCALL(name, err, nr, args...) \
INTERNAL_SYSCALL (name, err, nr, ##args)
#endif
/* This version is for internal uses when there is no desire
to set errno */
#define INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK(name, err, nr, args...) \
({ \
long int _ret = ENOSYS; \
\
if (__vdso_##name != NULL) \
_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, nr, ##args); \
__typeof (__vdso_##name) vdsop = __vdso_##name; \
PTR_DEMANGLE (vdsop); \
if (vdsop != NULL) \
_ret = INTERNAL_VSYSCALL_CALL (vdsop, err, nr, ##args); \
else \
err = 1 << 28; \
_ret; \
})
#define INTERNAL_VSYSCALL_NCS(fn, err, nr, args...) \
#define INTERNAL_VSYSCALL_CALL(fn, err, nr, args...) \
({ \
DECLARGS_##nr(args) \
register long _ret asm("2"); \

98
sysdeps/unix/sysv/linux/sysdep-vdso.h Normal file
View File

@ -0,0 +1,98 @@
/* vDSO common definition for Linux.
Copyright (C) 2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef SYSDEP_VDSO_LINUX_H
# define SYSDEP_VDSO_LINUX_H
#define VDSO_SYMBOL(__name) __vdso_##__name
#ifndef INTERNAL_VSYSCALL_CALL
# define INTERNAL_VSYSCALL_CALL(funcptr, err, nr, args...) \
funcptr (args)
#endif
#ifdef SHARED
# ifdef HAVE_VSYSCALL
# include <libc-vdso.h>
# define INLINE_VSYSCALL(name, nr, args...) \
({ \
__label__ out; \
__label__ iserr; \
INTERNAL_SYSCALL_DECL (sc_err); \
long int sc_ret; \
\
__typeof (__vdso_##name) vdsop = __vdso_##name; \
PTR_DEMANGLE (vdsop); \
if (vdsop != NULL) \
{ \
sc_ret = INTERNAL_VSYSCALL_CALL (vdsop, sc_err, nr, ##args); \
if (!INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
goto out; \
if (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err) != ENOSYS) \
goto iserr; \
} \
\
sc_ret = INTERNAL_SYSCALL (name, sc_err, nr, ##args); \
if (INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
{ \
iserr: \
__set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err)); \
sc_ret = -1L; \
} \
out: \
sc_ret; \
})
# define INTERNAL_VSYSCALL(name, err, nr, args...) \
({ \
__label__ out; \
long v_ret; \
\
__typeof (__vdso_##name) vdsop = __vdso_##name; \
PTR_DEMANGLE (vdsop); \
if (vdsop != NULL) \
{ \
v_ret = INTERNAL_VSYSCALL_CALL (vdsop, err, nr, ##args); \
if (!INTERNAL_SYSCALL_ERROR_P (v_ret, err) \
|| INTERNAL_SYSCALL_ERRNO (v_ret, err) != ENOSYS) \
goto out; \
} \
v_ret = INTERNAL_SYSCALL (name, err, nr, ##args); \
out: \
v_ret; \
})
# else
# define INLINE_VSYSCALL(name, nr, args...) \
INLINE_SYSCALL (name, nr, ##args)
# define INTERNAL_VSYSCALL(name, err, nr, args...) \
INTERNAL_SYSCALL (name, err, nr, ##args)
# endif /* HAVE_VSYSCALL */
# else /* SHARED */
# define INLINE_VSYSCALL(name, nr, args...) \
INLINE_SYSCALL (name, nr, ##args)
# define INTERNAL_VSYSCALL(name, err, nr, args...) \
INTERNAL_SYSCALL (name, err, nr, ##args)
#endif /* SHARED */
#endif /* SYSDEP_VDSO_LINUX_H */

4
sysdeps/unix/sysv/linux/tile/gettimeofday.c
View File

@ -19,7 +19,9 @@
#include <stddef.h>
#include <sys/time.h>
#include <time.h>
#include <libc-vdso.h>
#define HAVE_VSYSCALL
#include <sysdep-vdso.h>
int
__gettimeofday (struct timeval *tv, struct timezone *tz)

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

14
sysdeps/unix/sysv/linux/tile/libc-vdso.h
View File

@ -22,19 +22,21 @@
#ifdef SHARED
#include <sysdep-vdso.h>
struct syscall_return_value
{
long int value;
long int error;
};
extern struct syscall_return_value (*__vdso_gettimeofday) (struct timeval *,
void *)
extern struct syscall_return_value (*VDSO_SYMBOL (gettimeofday)) (struct
timeval *,
void *)
attribute_hidden;
extern struct syscall_return_value (*__vdso_clock_gettime) (clockid_t,
struct timespec *);
extern struct syscall_return_value (*VDSO_SYMBOL (clock_gettime)) (clockid_t,
struct
timespec *);
#endif
#endif /* _LIBC_VDSO_H */

68
sysdeps/unix/sysv/linux/tile/sysdep.h
View File

@ -202,71 +202,19 @@
"=R02" (_clobber_r2), "=R03" (_clobber_r3), "=R04" (_clobber_r4), \
"=R05" (_clobber_r5), "=R10" (_clobber_r10)
/* This version is for kernels that implement system calls that
behave like function calls as far as register saving.
It falls back to the syscall in the case that the vDSO doesn't
exist or fails for ENOSYS */
# ifdef SHARED
# define INLINE_VSYSCALL(name, nr, args...) \
({ \
__label__ out; \
__label__ iserr; \
INTERNAL_SYSCALL_DECL (sc_err); \
long int sc_ret; \
\
__typeof (__vdso_##name) vdsop = __vdso_##name; \
if (vdsop != NULL) \
{ \
struct syscall_return_value rv = vdsop (args); \
sc_ret = rv.value; \
sc_err = rv.error; \
if (!INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
goto out; \
if (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err) != ENOSYS) \
goto iserr; \
} \
\
sc_ret = INTERNAL_SYSCALL (name, sc_err, nr, ##args); \
if (INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
{ \
iserr: \
__set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err)); \
sc_ret = -1L; \
} \
out: \
sc_ret; \
})
# define INTERNAL_VSYSCALL(name, err, nr, args...) \
({ \
__label__ out; \
long int v_ret; \
\
__typeof (__vdso_##name) vdsop = __vdso_##name; \
if (vdsop != NULL) \
{ \
struct syscall_return_value rv = vdsop (args); \
v_ret = rv.value; \
err = rv.error; \
if (!INTERNAL_SYSCALL_ERROR_P (v_ret, err) \
|| INTERNAL_SYSCALL_ERRNO (v_ret, err) != ENOSYS) \
goto out; \
} \
v_ret = INTERNAL_SYSCALL (name, err, nr, ##args); \
out: \
v_ret; \
})
# else
# define INLINE_VSYSCALL(name, nr, args...) \
INLINE_SYSCALL (name, nr, ##args)
# define INTERNAL_VSYSCALL(name, err, nr, args...) \
INTERNAL_SYSCALL (name, err, nr, ##args)
# endif
#endif /* not __ASSEMBLER__ */
#define INTERNAL_VSYSCALL_CALL(funcptr, err, nr, args...) \
({ \
struct syscall_return_value rv = funcptr (args); \
err = rv.error; \
rv.value; \
})
/* List of system calls which are supported as vsyscalls. */
#define HAVE_CLOCK_GETTIME_VSYSCALL 1
#endif /* __ASSEMBLER__ */
/* Pointer mangling support. */
#if IS_IN (rtld)
/* We cannot use the thread descriptor because in ld.so we use setjmp

20
sysdeps/unix/sysv/linux/timespec_get.c
View File

@ -18,31 +18,21 @@
#include <time.h>
#include <sysdep.h>
#ifndef HAVE_CLOCK_GETTIME_VSYSCALL
# undef INTERNAL_VSYSCALL
# define INTERNAL_VSYSCALL INTERNAL_SYSCALL
#else
# include <libc-vdso.h>
#ifdef HAVE_CLOCK_GETTIME_VSYSCALL
# define HAVE_VSYSCALL
#endif
#ifndef INTERNAL_GETTIME
# define INTERNAL_GETTIME(id, tp) \
INTERNAL_VSYSCALL (clock_gettime, err, 2, id, tp)
#endif
#include <sysdep-vdso.h>
/* Set TS to calendar time based in time base BASE. */
int
timespec_get (ts, base)
struct timespec *ts;
int base;
timespec_get (struct timespec *ts, int base)
{
switch (base)
{
int res;
INTERNAL_SYSCALL_DECL (err);
case TIME_UTC:
res = INTERNAL_GETTIME (CLOCK_REALTIME, ts);
res = INTERNAL_VSYSCALL (clock_gettime, err, 2, CLOCK_REALTIME, ts);
if (INTERNAL_SYSCALL_ERROR_P (res, err))
return 0;
break;

4
sysdeps/unix/sysv/linux/x86/libc-vdso.h
View File

@ -24,7 +24,9 @@
#ifdef SHARED
extern long int (*__vdso_clock_gettime) (clockid_t, struct timespec *)
# include <sysdep-vdso.h>
extern long int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *)
attribute_hidden;
#endif

9
sysdeps/unix/sysv/linux/x86_64/init-first.c
View File

@ -22,9 +22,10 @@
# include <dl-vdso.h>
# include <libc-vdso.h>
long int (*__vdso_clock_gettime) (clockid_t, struct timespec *)
long int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *)
attribute_hidden;
long int (*VDSO_SYMBOL(getcpu)) (unsigned *, unsigned *, void *)
attribute_hidden;
long int (*__vdso_getcpu) (unsigned *, unsigned *, void *) attribute_hidden;
extern long int __syscall_clock_gettime (clockid_t, struct timespec *);
@ -38,7 +39,7 @@ __vdso_platform_setup (void)
if (p == NULL)
p = __syscall_clock_gettime;
PTR_MANGLE (p);
__vdso_clock_gettime = p;
VDSO_SYMBOL(clock_gettime) = p;
p = _dl_vdso_vsym ("__vdso_getcpu", &linux26);
/* If the vDSO is not available we fall back on the old vsyscall. */
@ -46,7 +47,7 @@ __vdso_platform_setup (void)
if (p == NULL)
p = (void *) VSYSCALL_ADDR_vgetcpu;
PTR_MANGLE (p);
__vdso_getcpu = p;
VDSO_SYMBOL(getcpu) = p;
}
# define VDSO_SETUP __vdso_platform_setup

55
sysdeps/unix/sysv/linux/x86_64/sysdep.h
View File

@ -252,61 +252,6 @@
# undef INTERNAL_SYSCALL_ERRNO
# define INTERNAL_SYSCALL_ERRNO(val, err) (-(val))
# ifdef SHARED
# define INLINE_VSYSCALL(name, nr, args...) \
({ \
__label__ out; \
__label__ iserr; \
INTERNAL_SYSCALL_DECL (sc_err); \
long int sc_ret; \
\
__typeof (__vdso_##name) vdsop = __vdso_##name; \
PTR_DEMANGLE (vdsop); \
if (vdsop != NULL) \
{ \
sc_ret = vdsop (args); \
if (!INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
goto out; \
if (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err) != ENOSYS) \
goto iserr; \
} \
\
sc_ret = INTERNAL_SYSCALL (name, sc_err, nr, ##args); \
if (INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
{ \
iserr: \
__set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err)); \
sc_ret = -1L; \
} \
out: \
sc_ret; \
})
# define INTERNAL_VSYSCALL(name, err, nr, args...) \
({ \
__label__ out; \
long int v_ret; \
\
__typeof (__vdso_##name) vdsop = __vdso_##name; \
PTR_DEMANGLE (vdsop); \
if (vdsop != NULL) \
{ \
v_ret = vdsop (args); \
if (!INTERNAL_SYSCALL_ERROR_P (v_ret, err) \
|| INTERNAL_SYSCALL_ERRNO (v_ret, err) != ENOSYS) \
goto out; \
} \
v_ret = INTERNAL_SYSCALL (name, err, nr, ##args); \
out: \
v_ret; \
})
# else
# define INLINE_VSYSCALL(name, nr, args...) \
INLINE_SYSCALL (name, nr, ##args)
# define INTERNAL_VSYSCALL(name, err, nr, args...) \
INTERNAL_SYSCALL (name, err, nr, ##args)
# endif
# define LOAD_ARGS_0()
# define LOAD_REGS_0
# define ASM_ARGS_0