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From 51a8476450158fb522c791c73b7b56dc30a741fc Mon Sep 17 00:00:00 2001
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From: Anton Blanchard <anton@samba.org>
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Date: Tue, 15 Jan 2013 12:50:46 -0600
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Subject: [PATCH 14/42] PowerPC: Rename __kernel_vdso_get_tbfreq to
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__kernel_get_tbfreq.
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In order for the __kernel_get_tbfreq vDSO call to work the
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INTERNAL_VSYSCALL_NCS macro needed to be updated to prevent it from
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assuming an integer return type (since the timebase frequency is a 64-bit
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value) by specifying the type of the return type as a macro parameter. The
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macro then specifically declares the return value as a 'register' (or
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implied pair) of the denoted type. The compiler is then informed that this
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register (or implied pair) is to be used for the return value.
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(cherry picked from commit 471a1672d4d55124de4db8273829f96cc14d424a)
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---
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sysdeps/unix/sysv/linux/powerpc/get_clockfreq.c | 3 ++-
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sysdeps/unix/sysv/linux/powerpc/init-first.c | 2 +-
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sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h | 28 +++++++++++----------
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sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h | 29 +++++++++++-----------
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5 files changed, 55 insertions(+), 29 deletions(-)
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diff --git a/sysdeps/unix/sysv/linux/powerpc/get_clockfreq.c b/sysdeps/unix/sysv/linux/powerpc/get_clockfreq.c
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index a863a27..021594c 100644
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--- a/sysdeps/unix/sysv/linux/powerpc/get_clockfreq.c
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+++ b/sysdeps/unix/sysv/linux/powerpc/get_clockfreq.c
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@@ -41,7 +41,8 @@ __get_clockfreq (void)
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/* If we can use the vDSO to obtain the timebase even better. */
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#ifdef SHARED
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INTERNAL_SYSCALL_DECL (err);
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- timebase_freq = INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK (get_tbfreq, err, 0);
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+ timebase_freq =
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+ INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK (get_tbfreq, err, hp_timing_t, 0);
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if (INTERNAL_SYSCALL_ERROR_P (timebase_freq, err)
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&& INTERNAL_SYSCALL_ERRNO (timebase_freq, err) == ENOSYS)
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#endif
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diff --git a/sysdeps/unix/sysv/linux/powerpc/init-first.c b/sysdeps/unix/sysv/linux/powerpc/init-first.c
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index 6bcb7d5..5587e2a 100644
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--- a/sysdeps/unix/sysv/linux/powerpc/init-first.c
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+++ b/sysdeps/unix/sysv/linux/powerpc/init-first.c
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@@ -41,7 +41,7 @@ _libc_vdso_platform_setup (void)
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__vdso_clock_getres = _dl_vdso_vsym ("__kernel_clock_getres", &linux2615);
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- __vdso_get_tbfreq = _dl_vdso_vsym ("__kernel_vdso_get_tbfreq", &linux2615);
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+ __vdso_get_tbfreq = _dl_vdso_vsym ("__kernel_get_tbfreq", &linux2615);
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__vdso_getcpu = _dl_vdso_vsym ("__kernel_getcpu", &linux2615);
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}
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diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h b/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h
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index da25c01..fa4116e 100644
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--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h
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+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h
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@@ -60,7 +60,8 @@
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\
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if (__vdso_##name != NULL) \
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{ \
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- sc_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, sc_err, nr, ##args); \
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+ sc_ret = \
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+ INTERNAL_VSYSCALL_NCS (__vdso_##name, sc_err, long int, nr, ##args);\
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if (!INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
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goto out; \
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if (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err) != ENOSYS) \
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@@ -90,7 +91,8 @@
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\
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if (__vdso_##name != NULL) \
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{ \
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- v_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, nr, ##args); \
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+ v_ret = \
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+ INTERNAL_VSYSCALL_NCS (__vdso_##name, err, long int, nr, ##args); \
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if (!INTERNAL_SYSCALL_ERROR_P (v_ret, err) \
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|| INTERNAL_SYSCALL_ERRNO (v_ret, err) != ENOSYS) \
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goto out; \
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@@ -104,12 +106,12 @@
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INTERNAL_SYSCALL (name, err, nr, ##args)
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# endif
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-# define INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK(name, err, nr, args...) \
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+# define INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK(name, err, type, nr, args...) \
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({ \
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- long int sc_ret = ENOSYS; \
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+ type sc_ret = ENOSYS; \
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\
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if (__vdso_##name != NULL) \
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- sc_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, nr, ##args); \
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+ sc_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, type, nr, ##args); \
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else \
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err = 1 << 28; \
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sc_ret; \
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@@ -126,7 +128,7 @@
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function call, with the exception of LR (which is needed for the
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"sc; bnslr+" sequence) and CR (where only CR0.SO is clobbered to signal
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an error return status). */
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-# define INTERNAL_VSYSCALL_NCS(funcptr, err, nr, args...) \
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+# define INTERNAL_VSYSCALL_NCS(funcptr, err, type, nr, args...) \
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({ \
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register void *r0 __asm__ ("r0"); \
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register long int r3 __asm__ ("r3"); \
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@@ -139,18 +141,18 @@
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register long int r10 __asm__ ("r10"); \
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register long int r11 __asm__ ("r11"); \
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register long int r12 __asm__ ("r12"); \
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+ register type rval __asm__ ("r3"); \
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LOADARGS_##nr (funcptr, args); \
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__asm__ __volatile__ \
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("mtctr %0\n\t" \
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"bctrl\n\t" \
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"mfcr %0" \
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- : "=&r" (r0), \
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- "=&r" (r3), "=&r" (r4), "=&r" (r5), "=&r" (r6), "=&r" (r7), \
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- "=&r" (r8), "=&r" (r9), "=&r" (r10), "=&r" (r11), "=&r" (r12) \
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- : ASM_INPUT_##nr \
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- : "cr0", "ctr", "lr", "memory"); \
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+ : "+r" (r0), "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6), "+r" (r7), \
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+ "+r" (r8), "+r" (r9), "+r" (r10), "+r" (r11), "+r" (r12) \
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+ : : "cr0", "ctr", "lr", "memory"); \
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err = (long int) r0; \
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- (int) r3; \
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+ __asm__ __volatile__ ("" : "=r" (rval) : "r" (r3), "r" (r4)); \
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+ rval; \
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})
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# undef INLINE_SYSCALL
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@@ -191,7 +193,7 @@
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register long int r10 __asm__ ("r10"); \
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register long int r11 __asm__ ("r11"); \
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register long int r12 __asm__ ("r12"); \
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- LOADARGS_##nr(name, args); \
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+ LOADARGS_##nr(name, args); \
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__asm__ __volatile__ \
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("sc \n\t" \
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"mfcr %0" \
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diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h b/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h
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index 059cf70..b4cdbbb 100644
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--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h
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+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h
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@@ -75,7 +75,8 @@
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\
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if (__vdso_##name != NULL) \
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{ \
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- sc_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, sc_err, nr, ##args); \
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+ sc_ret = \
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+ INTERNAL_VSYSCALL_NCS (__vdso_##name, sc_err, long int, nr, ##args);\
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if (!INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
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goto out; \
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if (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err) != ENOSYS) \
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@@ -105,7 +106,8 @@
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\
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if (__vdso_##name != NULL) \
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{ \
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- v_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, nr, ##args); \
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+ v_ret = \
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+ INTERNAL_VSYSCALL_NCS (__vdso_##name, err, long int, nr, ##args); \
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if (!INTERNAL_SYSCALL_ERROR_P (v_ret, err) \
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|| INTERNAL_SYSCALL_ERRNO (v_ret, err) != ENOSYS) \
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goto out; \
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@@ -121,12 +123,12 @@
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/* This version is for internal uses when there is no desire
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to set errno */
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-#define INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK(name, err, nr, args...) \
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+#define INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK(name, err, type, nr, args...) \
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({ \
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- long int sc_ret = ENOSYS; \
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+ type sc_ret = ENOSYS; \
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\
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if (__vdso_##name != NULL) \
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- sc_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, nr, ##args); \
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+ sc_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, type, nr, ##args); \
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else \
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err = 1 << 28; \
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sc_ret; \
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@@ -142,7 +144,7 @@
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gave back in the non-error (CR0.SO cleared) case, otherwise (CR0.SO set)
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the negation of the return value in the kernel gets reverted. */
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-#define INTERNAL_VSYSCALL_NCS(funcptr, err, nr, args...) \
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+#define INTERNAL_VSYSCALL_NCS(funcptr, err, type, nr, args...) \
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({ \
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register void *r0 __asm__ ("r0"); \
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register long int r3 __asm__ ("r3"); \
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@@ -151,20 +153,19 @@
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register long int r6 __asm__ ("r6"); \
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register long int r7 __asm__ ("r7"); \
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register long int r8 __asm__ ("r8"); \
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+ register type rval __asm__ ("r3"); \
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LOADARGS_##nr (funcptr, args); \
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__asm__ __volatile__ \
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("mtctr %0\n\t" \
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"bctrl\n\t" \
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"mfcr %0\n\t" \
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"0:" \
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- : "=&r" (r0), \
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- "=&r" (r3), "=&r" (r4), "=&r" (r5), \
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- "=&r" (r6), "=&r" (r7), "=&r" (r8) \
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- : ASM_INPUT_##nr \
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- : "r9", "r10", "r11", "r12", \
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- "cr0", "ctr", "lr", "memory"); \
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- err = (long int) r0; \
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- r3; \
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+ : "+r" (r0), "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6), \
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+ "+r" (r7), "+r" (r8) \
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+ : : "r9", "r10", "r11", "r12", "cr0", "ctr", "lr", "memory"); \
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+ err = (long int) r0; \
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+ __asm__ __volatile__ ("" : "=r" (rval) : "r" (r3)); \
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+ rval; \
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})
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#undef INLINE_SYSCALL
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--
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1.7.11.7
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