From f534255e4d276ee7b20b45637d16a00b122e5df3 Mon Sep 17 00:00:00 2001 From: Adhemerval Zanella Date: Fri, 17 Apr 2015 10:58:31 -0300 Subject: Consolidate vDSO macros and usage 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. --- sysdeps/unix/sysv/linux/powerpc/init-first.c | 56 ++++++++++++++++++---------- 1 file changed, 37 insertions(+), 19 deletions(-) (limited to 'sysdeps/unix/sysv/linux/powerpc/init-first.c') diff --git a/sysdeps/unix/sysv/linux/powerpc/init-first.c b/sysdeps/unix/sysv/linux/powerpc/init-first.c index b4917d12a5..ee91c0bf9e 100644 --- a/sysdeps/unix/sysv/linux/powerpc/init-first.c +++ b/sysdeps/unix/sysv/linux/powerpc/init-first.c @@ -23,17 +23,19 @@ # undef __clock_getres # include -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 } -- cgit 1.4.1