* sysdeps/unix/sysv/linux/powerpc/dl-vdso.c: Move to...

* sysdeps/unix/sysv/linux/dl-vdso.c: ...here.
	* sysdeps/unix/sysv/linux/powerpc/dl-vdso.h: Move to...
	* sysdeps/unix/sysv/linux/dl-vdso.h: ...here.
	* csu/libc-start.c: Pretty printing.
	Use VDSO_SETUP if defined.
	* sysdeps/unix/sysv/linux/powerpc/libc-start.c: Define VDSO_SETUP
	and let generic code call into _libc_vdso_platform_setup.
	* sysdeps/unix/sysv/linux/x86_64/libc-start.c: New file.
	* sysdeps/unix/sysv/linux/x86_64/bits/libc-vdso.h: New file.
	* sysdeps/unix/sysv/linux/x86_64/sysdep.h: Pretty printing.
	Define INLINE_VSYSCALL and INTERNAL_VSYSCALL.
	* sysdeps/unix/sysv/linux/x86_64/Versions: Export __vdso_clock_gettime
	for GLIBC_PRIVATE.
	* sysdeps/unix/sysv/linux/x86_64/Makefile [subdir=elf]
	(sysdep_rountines): Add dl-vdso.

	* sysdeps/unix/sysv/linux/powerpc/Makefile: Use sysdep_routines instead
	of routines.

	* sysdeps/unix/sysv/linux/powerpc/bits/libc-vdso.h: Add
	attribute_hidden to __vdso_gettimeofday prototype.
This commit is contained in:
Ulrich Drepper 2007-08-12 19:03:54 +00:00
parent f47e262624
commit 75fb247e69
12 changed files with 266 additions and 104 deletions

View file

@ -1,3 +1,28 @@
2007-08-12 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/powerpc/dl-vdso.c: Move to...
* sysdeps/unix/sysv/linux/dl-vdso.c: ...here.
* sysdeps/unix/sysv/linux/powerpc/dl-vdso.h: Move to...
* sysdeps/unix/sysv/linux/dl-vdso.h: ...here.
* csu/libc-start.c: Pretty printing.
Use VDSO_SETUP if defined.
* sysdeps/unix/sysv/linux/powerpc/libc-start.c: Define VDSO_SETUP
and let generic code call into _libc_vdso_platform_setup.
* sysdeps/unix/sysv/linux/x86_64/libc-start.c: New file.
* sysdeps/unix/sysv/linux/x86_64/bits/libc-vdso.h: New file.
* sysdeps/unix/sysv/linux/x86_64/sysdep.h: Pretty printing.
Define INLINE_VSYSCALL and INTERNAL_VSYSCALL.
* sysdeps/unix/sysv/linux/x86_64/Versions: Export __vdso_clock_gettime
for GLIBC_PRIVATE.
* sysdeps/unix/sysv/linux/x86_64/Makefile [subdir=elf]
(sysdep_rountines): Add dl-vdso.
* sysdeps/unix/sysv/linux/powerpc/Makefile: Use sysdep_routines instead
of routines.
* sysdeps/unix/sysv/linux/powerpc/bits/libc-vdso.h: Add
attribute_hidden to __vdso_gettimeofday prototype.
2007-08-12 Roland McGrath <roland@redhat.com>
* manual/stdio.texi (Variable Arguments Output): Fix xref to gcc manual.

View file

@ -138,16 +138,18 @@ LIBC_START_MAIN (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL),
functions are using thread functions if these are available and
we need to setup errno. */
__pthread_initialize_minimal ();
#endif
# ifndef SHARED
/* Set up the stack checker's canary. */
uintptr_t stack_chk_guard = _dl_setup_stack_chk_guard ();
# ifdef THREAD_SET_STACK_GUARD
# ifdef THREAD_SET_STACK_GUARD
THREAD_SET_STACK_GUARD (stack_chk_guard);
# else
# else
__stack_chk_guard = stack_chk_guard;
# endif
# endif
#endif
#ifdef VDSO_SETUP
VDSO_SETUP ();
#endif
/* Register the destructor of the dynamic linker if there is any. */

View file

@ -8,5 +8,5 @@ gen-as-const-headers += ucontext_i.sym
endif
ifeq ($(subdir),elf)
routines += dl-vdso
sysdep_routines += dl-vdso
endif

View file

@ -23,7 +23,7 @@
#ifdef SHARED
extern void *__vdso_gettimeofday;
extern void *__vdso_gettimeofday attribute_hidden;
extern void *__vdso_clock_gettime;

View file

@ -24,23 +24,6 @@
#include <bp-start.h>
#include <bp-sym.h>
int __cache_line_size attribute_hidden;
/* The main work is done in the generic function. */
#define LIBC_START_MAIN generic_start_main
#define LIBC_START_DISABLE_INLINE
#define LIBC_START_MAIN_AUXVEC_ARG
#define MAIN_AUXVEC_ARG
#define INIT_MAIN_ARGS
#include <csu/libc-start.c>
struct startup_info
{
void *__unbounded sda_base;
int (*main) (int, char **, char **, void *);
int (*init) (int, char **, char **, void *);
void (*fini) (void);
};
#ifdef SHARED
# include <sys/time.h>
@ -69,8 +52,28 @@ static inline void _libc_vdso_platform_setup (void)
__vdso_get_tbfreq = _dl_vdso_vsym ("__kernel_vdso_get_tbfreq",
"LINUX_2.6.15");
}
# define VDSO_SETUP _libc_vdso_platform_setup
#endif
int __cache_line_size attribute_hidden;
/* The main work is done in the generic function. */
#define LIBC_START_MAIN generic_start_main
#define LIBC_START_DISABLE_INLINE
#define LIBC_START_MAIN_AUXVEC_ARG
#define MAIN_AUXVEC_ARG
#define INIT_MAIN_ARGS
#include <csu/libc-start.c>
struct startup_info
{
void *__unbounded sda_base;
int (*main) (int, char **, char **, void *);
int (*init) (int, char **, char **, void *);
void (*fini) (void);
};
int
/* GKM FIXME: GCC: this should get __BP_ prefix by virtue of the
BPs in the arglist of startup_info.main and startup_info.init. */
@ -117,10 +120,7 @@ int
__cache_line_size = av->a_un.a_val;
break;
}
#ifdef SHARED
/* Resolve and initialize function pointers for VDSO functions. */
_libc_vdso_platform_setup ();
#endif
return generic_start_main (stinfo->main, argc, ubp_av, auxvec,
stinfo->init, stinfo->fini, rtld_fini,
stack_on_entry);

View file

@ -13,3 +13,7 @@ endif
ifeq ($(subdir),csu)
gen-as-const-headers += ucontext_i.sym
endif
ifeq ($(subdir),elf)
sysdep_routines += dl-vdso
endif

View file

@ -6,4 +6,7 @@ libc {
modify_ldt;
}
GLIBC_PRIVATE {
__vdso_clock_gettime;
}
}

View file

@ -0,0 +1,35 @@
/* Resolve function pointers to VDSO functions.
Copyright (C) 2005, 2007 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifndef _LIBC_VDSO_H
#define _LIBC_VDSO_H
#include <time.h>
#include <sys/time.h>
#ifdef SHARED
extern int (*__vdso_gettimeofday) (struct timeval *, void *)
attribute_hidden;
extern int (*__vdso_clock_gettime) (clockid_t, struct timespec *);
#endif
#endif /* _LIBC_VDSO_H */

View file

@ -0,0 +1,39 @@
/* Copyright (C) 2007 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifdef SHARED
# include <dl-vdso.h>
# include <bits/libc-vdso.h>
int (*__vdso_gettimeofday) (struct timeval *, void *) attribute_hidden;
int (*__vdso_clock_gettime) (clockid_t, struct timespec *);
static inline void
_libc_vdso_platform_setup (void)
{
__vdso_gettimeofday = _dl_vdso_vsym ("gettimeofday", "LINUX_2.6");
__vdso_clock_gettime = _dl_vdso_vsym ("clock_gettime", "LINUX_2.6");
}
# define VDSO_SETUP _libc_vdso_platform_setup
#endif
#include <csu/libc-start.c>

View file

@ -68,14 +68,14 @@
/* We don't want the label for the error handle to be global when we define
it here. */
#ifdef PIC
# define SYSCALL_ERROR_LABEL 0f
#else
# define SYSCALL_ERROR_LABEL syscall_error
#endif
# ifdef PIC
# define SYSCALL_ERROR_LABEL 0f
# else
# define SYSCALL_ERROR_LABEL syscall_error
# endif
#undef PSEUDO
#define PSEUDO(name, syscall_name, args) \
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name) \
DO_CALL (syscall_name, args); \
@ -83,40 +83,40 @@
jae SYSCALL_ERROR_LABEL; \
L(pseudo_end):
#undef PSEUDO_END
#define PSEUDO_END(name) \
# undef PSEUDO_END
# define PSEUDO_END(name) \
SYSCALL_ERROR_HANDLER \
END (name)
#undef PSEUDO_NOERRNO
#define PSEUDO_NOERRNO(name, syscall_name, args) \
# undef PSEUDO_NOERRNO
# define PSEUDO_NOERRNO(name, syscall_name, args) \
.text; \
ENTRY (name) \
DO_CALL (syscall_name, args)
#undef PSEUDO_END_NOERRNO
#define PSEUDO_END_NOERRNO(name) \
# undef PSEUDO_END_NOERRNO
# define PSEUDO_END_NOERRNO(name) \
END (name)
#define ret_NOERRNO ret
# define ret_NOERRNO ret
#undef PSEUDO_ERRVAL
#define PSEUDO_ERRVAL(name, syscall_name, args) \
# undef PSEUDO_ERRVAL
# define PSEUDO_ERRVAL(name, syscall_name, args) \
.text; \
ENTRY (name) \
DO_CALL (syscall_name, args); \
negq %rax
#undef PSEUDO_END_ERRVAL
#define PSEUDO_END_ERRVAL(name) \
# undef PSEUDO_END_ERRVAL
# define PSEUDO_END_ERRVAL(name) \
END (name)
#define ret_ERRVAL ret
# define ret_ERRVAL ret
#ifndef PIC
#define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */
#elif RTLD_PRIVATE_ERRNO
# define SYSCALL_ERROR_HANDLER \
# ifndef PIC
# define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */
# elif RTLD_PRIVATE_ERRNO
# define SYSCALL_ERROR_HANDLER \
0: \
leaq rtld_errno(%rip), %rcx; \
xorl %edx, %edx; \
@ -124,13 +124,13 @@
movl %edx, (%rcx); \
orq $-1, %rax; \
jmp L(pseudo_end);
#elif USE___THREAD
# ifndef NOT_IN_libc
# define SYSCALL_ERROR_ERRNO __libc_errno
# else
# define SYSCALL_ERROR_ERRNO errno
# endif
# define SYSCALL_ERROR_HANDLER \
# elif USE___THREAD
# ifndef NOT_IN_libc
# define SYSCALL_ERROR_ERRNO __libc_errno
# else
# define SYSCALL_ERROR_ERRNO errno
# endif
# define SYSCALL_ERROR_HANDLER \
0: \
movq SYSCALL_ERROR_ERRNO@GOTTPOFF(%rip), %rcx;\
xorl %edx, %edx; \
@ -138,10 +138,10 @@
movl %edx, %fs:(%rcx); \
orq $-1, %rax; \
jmp L(pseudo_end);
#elif defined _LIBC_REENTRANT
# elif defined _LIBC_REENTRANT
/* Store (- %rax) into errno through the GOT.
Note that errno occupies only 4 bytes. */
# define SYSCALL_ERROR_HANDLER \
# define SYSCALL_ERROR_HANDLER \
0: \
xorl %edx, %edx; \
subq %rax, %rdx; \
@ -158,15 +158,15 @@
/* A quick note: it is assumed that the call to `__errno_location' does
not modify the stack! */
#else /* Not _LIBC_REENTRANT. */
# define SYSCALL_ERROR_HANDLER \
# else /* Not _LIBC_REENTRANT. */
# define SYSCALL_ERROR_HANDLER \
0:movq errno@GOTPCREL(%RIP), %rcx; \
xorl %edx, %edx; \
subq %rax, %rdx; \
movl %edx, (%rcx); \
orq $-1, %rax; \
jmp L(pseudo_end);
#endif /* PIC */
# endif /* PIC */
/* The Linux/x86-64 kernel expects the system call parameters in
registers according to the following table:
@ -204,25 +204,25 @@
Syscalls of more than 6 arguments are not supported. */
#undef DO_CALL
#define DO_CALL(syscall_name, args) \
# undef DO_CALL
# define DO_CALL(syscall_name, args) \
DOARGS_##args \
movl $SYS_ify (syscall_name), %eax; \
syscall;
#define DOARGS_0 /* nothing */
#define DOARGS_1 /* nothing */
#define DOARGS_2 /* nothing */
#define DOARGS_3 /* nothing */
#define DOARGS_4 movq %rcx, %r10;
#define DOARGS_5 DOARGS_4
#define DOARGS_6 DOARGS_5
# define DOARGS_0 /* nothing */
# define DOARGS_1 /* nothing */
# define DOARGS_2 /* nothing */
# define DOARGS_3 /* nothing */
# define DOARGS_4 movq %rcx, %r10;
# define DOARGS_5 DOARGS_4
# define DOARGS_6 DOARGS_5
#else /* !__ASSEMBLER__ */
/* Define a macro which expands inline into the wrapper code for a system
call. */
#undef INLINE_SYSCALL
#define INLINE_SYSCALL(name, nr, args...) \
# undef INLINE_SYSCALL
# define INLINE_SYSCALL(name, nr, args...) \
({ \
unsigned long resultvar = INTERNAL_SYSCALL (name, , nr, args); \
if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (resultvar, ), 0)) \
@ -232,10 +232,10 @@
} \
(long) resultvar; })
#undef INTERNAL_SYSCALL_DECL
#define INTERNAL_SYSCALL_DECL(err) do { } while (0)
# undef INTERNAL_SYSCALL_DECL
# define INTERNAL_SYSCALL_DECL(err) do { } while (0)
#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
# define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
({ \
unsigned long resultvar; \
LOAD_ARGS_##nr (args) \
@ -245,68 +245,122 @@
: "=a" (resultvar) \
: "0" (name) ASM_ARGS_##nr : "memory", "cc", "r11", "cx"); \
(long) resultvar; })
#undef INTERNAL_SYSCALL
#define INTERNAL_SYSCALL(name, err, nr, args...) \
# undef INTERNAL_SYSCALL
# define INTERNAL_SYSCALL(name, err, nr, args...) \
INTERNAL_SYSCALL_NCS (__NR_##name, err, nr, ##args)
#undef INTERNAL_SYSCALL_ERROR_P
#define INTERNAL_SYSCALL_ERROR_P(val, err) \
# undef INTERNAL_SYSCALL_ERROR_P
# define INTERNAL_SYSCALL_ERROR_P(val, err) \
((unsigned long) (val) >= -4095L)
#undef INTERNAL_SYSCALL_ERRNO
#define INTERNAL_SYSCALL_ERRNO(val, err) (-(val))
# undef INTERNAL_SYSCALL_ERRNO
# define INTERNAL_SYSCALL_ERRNO(val, err) (-(val))
#define LOAD_ARGS_0()
#define LOAD_REGS_0
#define ASM_ARGS_0
# 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 = __vdso_##name (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; \
\
if (__vdso_##name != NULL) \
{ \
v_ret = __vdso_##name (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; \
})
#define LOAD_ARGS_1(a1) \
/* List of system calls which are supported as vsyscalls. */
# define HAVE_CLOCK_GETTIME_VSYSCALL 1
# 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
# define LOAD_ARGS_1(a1) \
long int __arg1 = (long) (a1); \
LOAD_ARGS_0 ()
#define LOAD_REGS_1 \
# define LOAD_REGS_1 \
register long int _a1 asm ("rdi") = __arg1; \
LOAD_REGS_0
#define ASM_ARGS_1 ASM_ARGS_0, "r" (_a1)
# define ASM_ARGS_1 ASM_ARGS_0, "r" (_a1)
#define LOAD_ARGS_2(a1, a2) \
# define LOAD_ARGS_2(a1, a2) \
long int __arg2 = (long) (a2); \
LOAD_ARGS_1 (a1)
#define LOAD_REGS_2 \
# define LOAD_REGS_2 \
register long int _a2 asm ("rsi") = __arg2; \
LOAD_REGS_1
#define ASM_ARGS_2 ASM_ARGS_1, "r" (_a2)
# define ASM_ARGS_2 ASM_ARGS_1, "r" (_a2)
#define LOAD_ARGS_3(a1, a2, a3) \
# define LOAD_ARGS_3(a1, a2, a3) \
long int __arg3 = (long) (a3); \
LOAD_ARGS_2 (a1, a2)
#define LOAD_REGS_3 \
# define LOAD_REGS_3 \
register long int _a3 asm ("rdx") = __arg3; \
LOAD_REGS_2
#define ASM_ARGS_3 ASM_ARGS_2, "r" (_a3)
# define ASM_ARGS_3 ASM_ARGS_2, "r" (_a3)
#define LOAD_ARGS_4(a1, a2, a3, a4) \
# define LOAD_ARGS_4(a1, a2, a3, a4) \
long int __arg4 = (long) (a4); \
LOAD_ARGS_3 (a1, a2, a3)
#define LOAD_REGS_4 \
# define LOAD_REGS_4 \
register long int _a4 asm ("r10") = __arg4; \
LOAD_REGS_3
#define ASM_ARGS_4 ASM_ARGS_3, "r" (_a4)
# define ASM_ARGS_4 ASM_ARGS_3, "r" (_a4)
#define LOAD_ARGS_5(a1, a2, a3, a4, a5) \
# define LOAD_ARGS_5(a1, a2, a3, a4, a5) \
long int __arg5 = (long) (a5); \
LOAD_ARGS_4 (a1, a2, a3, a4)
#define LOAD_REGS_5 \
# define LOAD_REGS_5 \
register long int _a5 asm ("r8") = __arg5; \
LOAD_REGS_4
#define ASM_ARGS_5 ASM_ARGS_4, "r" (_a5)
# define ASM_ARGS_5 ASM_ARGS_4, "r" (_a5)
#define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \
# define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \
long int __arg6 = (long) (a6); \
LOAD_ARGS_5 (a1, a2, a3, a4, a5)
#define LOAD_REGS_6 \
# define LOAD_REGS_6 \
register long int _a6 asm ("r9") = __arg6; \
LOAD_REGS_5
#define ASM_ARGS_6 ASM_ARGS_5, "r" (_a6)
# define ASM_ARGS_6 ASM_ARGS_5, "r" (_a6)
#endif /* __ASSEMBLER__ */