2005-12-08 Steven Munroe <sjmunroe@us.ibm.com>

            Tom Gall <tom_gall@vnet.ibm.com>

	* elf/rtld.c (dl_main): Initialize l_local_scope for sysinfo_map.
	* sysdeps/powerpc/elf/libc-start.c: Move this...
	* sysdeps/unix/sysv/linux/powerpc/libc-start.c: ...to here.
	* sysdeps/powerpc/powerpc32/dl-start.S: Add _dl_main_dispatch label.
	* sysdeps/powerpc/powerpc32/hp-timing.h: New file.
	* sysdeps/unix/sysv/linux/powerpc/Versions: New file.
	* sysdeps/unix/sysv/linux/clock_getres.c: If HAVE_CLOCK_GETRES_VSYSCALL
	is not defined, redefine INTERNAL_VSYSCALL and INLINE_VSYSCALL to
	INTERNAL_SYSCALL and INLINE_SYSCALL respectively.  Otherwise include
	<bits/libc-vdso.h>.  Use INLINE_VSYSCALL and INTERNAL_SYSCALL instead
	of the normal versions throughout the code.
	* sysdeps/unix/sysv/linux/clock_gettime.c: Likewise if
	HAVE_CLOCK_GETTIME_VSYSCALL is defined.
	* sysdeps/unix/sysv/linux/powerpc/bits/libc-vdso.h: New file.
	* sysdeps/unix/sysv/linux/powerpc/dl-vdso.c: New file.
	* sysdeps/unix/sysv/linux/powerpc/dl-vdso.h: New file.
	* sysdeps/unix/sysv/linux/powerpc/get_clockfreq.c: Use vDSO.
	* sysdeps/unix/sysv/linux/powerpc/gettimeofday.c: New file.
	* sysdeps/unix/sysv/linux/powerpc/Makefile: Add dl-vdso to routines.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h: Define
	INLINE_VSYSCALL, INTERNAL_VSYSCALL, INTERNAL_SYSCALL_NCS,
	INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK, HAVE_CLOCK_GETRES_VSYSCALL,
	and HAVE_CLOCK_GETTIME_VSYSCALL.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h: Likewise.

1 files changed, 112 insertions, 6 deletions

diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h b/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h
index 3ece017..e0b4cb3 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h
@@ -62,12 +62,118 @@
 #ifdef __ASSEMBLER__
 
 /* This seems to always be the case on PPC.  */
-#define ALIGNARG(log2) log2
+# define ALIGNARG(log2) log2
 /* For ELF we need the `.type' directive to make shared libs work right.  */
-#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg;
-#define ASM_SIZE_DIRECTIVE(name) .size name,.-name
+# define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg;
+# define ASM_SIZE_DIRECTIVE(name) .size name,.-name
 
-#endif	/* __ASSEMBLER__ */
+#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, 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, 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, nr, args...)	      \
+  ({									      \
+    long int sc_ret = ENOSYS;						      \
+									      \
+    if (__vdso_##name != NULL)						      \
+      sc_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, 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 system
+   call. This use is for internal calls that do not need to handle errors
+   normally. It will never touch errno. This returns just what the kernel
+   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, nr, args...) \
+  ({									\
+    register void *r0  __asm__ ("r0");					\
+    register long int r3  __asm__ ("r3");				\
+    register long int r4  __asm__ ("r4");				\
+    register long int r5  __asm__ ("r5");				\
+    register long int r6  __asm__ ("r6");				\
+    register long int r7  __asm__ ("r7");				\
+    register long int r8  __asm__ ("r8");				\
+    LOADARGS_##nr (funcptr, args);					\
+    __asm__ __volatile__						\
+      ("mtctr %0\n\t"							\
+       "bctrl\n\t"							\
+       "mfcr  %0\n\t"							\
+       "0:"								\
+       : "=&r" (r0),							\
+         "=&r" (r3), "=&r" (r4), "=&r" (r5),				\
+         "=&r" (r6), "=&r" (r7), "=&r" (r8)				\
+       : ASM_INPUT_##nr							\
+       : "r9", "r10", "r11", "r12",					\
+         "cr0", "ctr", "lr", "memory");					\
+	  err = (long int) r0;						\
+    (int) r3;								\
+  })
 
 #undef INLINE_SYSCALL
 
@@ -101,7 +207,7 @@
     register long int r6  __asm__ ("r6");				\
     register long int r7  __asm__ ("r7");				\
     register long int r8  __asm__ ("r8");				\
-    LOADARGS_##nr(name, args);						\
+    LOADARGS_##nr (name, ##args);					\
     __asm__ __volatile__						\
       ("sc\n\t"								\
        "mfcr  %0\n\t"							\
@@ -116,7 +222,7 @@
     (int) r3;  \
   })
 #define INTERNAL_SYSCALL(name, err, nr, args...)			\
-  INTERNAL_SYSCALL_NCS (__NR_##name, err, nr, ##args)
+  INTERNAL_SYSCALL_NCS (__NR_##name, err, nr, args)
 
 #undef INTERNAL_SYSCALL_DECL
 #define INTERNAL_SYSCALL_DECL(err) long int err