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powerpc: Simplify vsyscall internal macros

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This patch simplifies the powerpc internal macros for vDSO calls
by:

  - Removing INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK, used solely on
    get_timebase_freq.

  - Adjust INTERNAL_VSYSCALL_CALL_TYPE powerpc32 to follow powerpc64
    argument ordering.

  - Use HAVE_*_VSYSCALL instead of explicit strings.

  - Make powerpc libc-vdso.h include generic implementation.

No semantic change expected, checked on powerpc-linux-gnu-power4,
powerpc64-linux-gnu, and powerpc64le-linux-gnu.

	* sysdeps/unix/sysv/linux/libc-vdso.h (VDSO_IFUNC_RET): Define if not
	defined.
	* sysdeps/unix/sysv/linux/powerpc/get_timebase_freq.c
	(__get_timebase_freq): Remove use of
	INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK.
	(get_timebase_freq_fallback): New symbol.
	* sysdeps/unix/sysv/linux/powerpc/gettimeofday.c (time): Use
	HAVE_GETTIMEOFDAY_VSYSCALL.
	* sysdeps/unix/sysv/linux/powerpc/time.c (gettimeofday): Use
	HAVE_TIME_VSYSCALL.
	* sysdeps/unix/sysv/linux/powerpc/libc-vdso.h: Include generic
	implementation.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h
	(INTERNAL_VSYSCALL_CALL_TYPE): Make calling convention similar to
	powerpc64.
	(INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK): Remove macro.
	* .../sysv/linux/powerpc/powerpc64/sysdep.h
	(INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK): Likewise.
	* sysdeps/unix/sysv/linux/powerpc/sysdep.h
	(HAVE_GETTIMEOFDAY_VSYSCALL): Define.
This commit is contained in:
Adhemerval Zanella
2019-06-03 21:07:25 +00:00
parent b8a7c7da4e
commit 986a506481
6 changed files with 59 additions and 54 deletions
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7
sysdeps/unix/sysv/linux/libc-vdso.h
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@@ -21,6 +21,13 @@
#define VDSO_SYMBOL(__name) __vdso_##__name
/* Adjust the return IFUNC value from a vDSO symbol accordingly required
by the ELFv1 ABI. It is used by the architecture to create an ODP
entry since the kernel vDSO does not provide it. */
#ifndef VDSO_IFUNC_RET
# define VDSO_IFUNC_RET(__value) (__value)
#endif
#ifdef HAVE_CLOCK_GETTIME_VSYSCALL
extern int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *)
attribute_hidden;