Rehash the PowerPC e500 port to avoid creating symlinks

in the powerpc arch code and make more code common with
classic PowerPC. From Steve Papacharalambous

Lets hope I didn't break something.

9 files changed, 329 insertions, 314 deletions

diff --git a/libc/sysdeps/linux/powerpc/bits/classic/fenv.h b/libc/sysdeps/linux/powerpc/bits/classic/fenv.h
deleted file mode 100644
index 8509b4b0c..000000000
--- a/libc/sysdeps/linux/powerpc/bits/classic/fenv.h
+++ /dev/null
@@ -1,145 +0,0 @@
-/* Copyright (C) 1997, 1998, 1999 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 _FENV_H
-# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
-#endif
-
-
-/* Define bits representing the exception.  We use the bit positions of
-   the appropriate bits in the FPSCR...  */
-enum
-  {
-    FE_INEXACT = 1 << (31 - 6),
-#define FE_INEXACT	FE_INEXACT
-    FE_DIVBYZERO = 1 << (31 - 5),
-#define FE_DIVBYZERO	FE_DIVBYZERO
-    FE_UNDERFLOW = 1 << (31 - 4),
-#define FE_UNDERFLOW	FE_UNDERFLOW
-    FE_OVERFLOW = 1 << (31 - 3),
-#define FE_OVERFLOW	FE_OVERFLOW
-
-    /* ... except for FE_INVALID, for which we use bit 31. FE_INVALID
-       actually corresponds to bits 7 through 12 and 21 through 23
-       in the FPSCR, but we can't use that because the current draft
-       says that it must be a power of 2.  Instead we use bit 2 which
-       is the summary bit for all the FE_INVALID exceptions, which
-       kind of makes sense.  */
-    FE_INVALID = 1 << (31 - 2),
-#define FE_INVALID	FE_INVALID
-
-#ifdef __USE_GNU
-    /* Breakdown of the FE_INVALID bits. Setting FE_INVALID on an
-       input to a routine is equivalent to setting all of these bits;
-       FE_INVALID will be set on output from a routine iff one of
-       these bits is set.  Note, though, that you can't disable or
-       enable these exceptions individually.  */
-
-    /* Operation with SNaN. */
-    FE_INVALID_SNAN = 1 << (31 - 7),
-# define FE_INVALID_SNAN	FE_INVALID_SNAN
-
-    /* Inf - Inf */
-    FE_INVALID_ISI = 1 << (31 - 8),
-# define FE_INVALID_ISI		FE_INVALID_ISI
-
-    /* Inf / Inf */
-    FE_INVALID_IDI = 1 << (31 - 9),
-# define FE_INVALID_IDI		FE_INVALID_IDI
-
-    /* 0 / 0 */
-    FE_INVALID_ZDZ = 1 << (31 - 10),
-# define FE_INVALID_ZDZ		FE_INVALID_ZDZ
-
-    /* Inf * 0 */
-    FE_INVALID_IMZ = 1 << (31 - 11),
-# define FE_INVALID_IMZ		FE_INVALID_IMZ
-
-    /* Comparison with NaN or SNaN.  */
-    FE_INVALID_COMPARE = 1 << (31 - 12),
-# define FE_INVALID_COMPARE	FE_INVALID_COMPARE
-
-    /* Invalid operation flag for software (not set by hardware).  */
-    /* Note that some chips don't have this implemented, presumably
-       because no-one expected anyone to write software for them %-).  */
-    FE_INVALID_SOFTWARE = 1 << (31 - 21),
-# define FE_INVALID_SOFTWARE	FE_INVALID_SOFTWARE
-
-    /* Square root of negative number (including -Inf).  */
-    /* Note that some chips don't have this implemented.  */
-    FE_INVALID_SQRT = 1 << (31 - 22),
-# define FE_INVALID_SQRT	FE_INVALID_SQRT
-
-    /* Conversion-to-integer of a NaN or a number too large or too small.  */
-    FE_INVALID_INTEGER_CONVERSION = 1 << (31 - 23)
-# define FE_INVALID_INTEGER_CONVERSION	FE_INVALID_INTEGER_CONVERSION
-
-# define FE_ALL_INVALID \
-        (FE_INVALID_SNAN | FE_INVALID_ISI | FE_INVALID_IDI | FE_INVALID_ZDZ \
-	 | FE_INVALID_IMZ | FE_INVALID_COMPARE | FE_INVALID_SOFTWARE \
-	 | FE_INVALID_SQRT | FE_INVALID_INTEGER_CONVERSION)
-#endif
-  };
-
-#define FE_ALL_EXCEPT \
-	(FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
-
-/* PowerPC chips support all of the four defined rounding modes.  We
-   use the bit pattern in the FPSCR as the values for the
-   appropriate macros.  */
-enum
-  {
-    FE_TONEAREST = 0,
-#define FE_TONEAREST	FE_TONEAREST
-    FE_TOWARDZERO = 1,
-#define FE_TOWARDZERO	FE_TOWARDZERO
-    FE_UPWARD = 2,
-#define FE_UPWARD	FE_UPWARD
-    FE_DOWNWARD = 3
-#define FE_DOWNWARD	FE_DOWNWARD
-  };
-
-/* Type representing exception flags.  */
-typedef unsigned int fexcept_t;
-
-/* Type representing floating-point environment.  We leave it as 'double'
-   for efficiency reasons (rather than writing it to a 32-bit integer). */
-typedef double fenv_t;
-
-/* If the default argument is used we use this value.  */
-extern const fenv_t __fe_dfl_env;
-#define FE_DFL_ENV	(&__fe_dfl_env)
-
-#ifdef __USE_GNU
-/* Floating-point environment where all exceptions are enabled.  Note that
-   this is not sufficient to give you SIGFPE.  */
-extern const fenv_t __fe_enabled_env;
-# define FE_ENABLED_ENV	(&__fe_enabled_env)
-
-/* Floating-point environment with (processor-dependent) non-IEEE floating
-   point.  */
-extern const fenv_t __fe_nonieee_env;
-# define FE_NONIEEE_ENV	(&__fe_nonieee_env)
-
-/* Floating-point environment with all exceptions enabled.  Note that
-   just evaluating this value will set the processor into 'FPU
-   exceptions imprecise recoverable' mode, which may cause a significant
-   performance penalty (but have no other visible effect).  */
-extern const fenv_t *__fe_nomask_env (void);
-# define FE_NOMASK_ENV	(__fe_nomask_env ())
-#endif
diff --git a/libc/sysdeps/linux/powerpc/bits/e500/fenv.h b/libc/sysdeps/linux/powerpc/bits/e500/fenv.h
deleted file mode 100644
index 41963da38..000000000
--- a/libc/sysdeps/linux/powerpc/bits/e500/fenv.h
+++ /dev/null
@@ -1,79 +0,0 @@
-/* Copyright (C) 2004 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 _FENV_H
-# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
-#endif
-
-
-/* Define bits representing the exception.  We use the bit positions of
-   the appropriate bits in the SPEFSCR...  */
-enum
-  {
-    FE_INEXACT = 1 << (63 - 42),
-#define FE_INEXACT	FE_INEXACT
-    FE_INVALID = 1 << (63 - 43),
-#define FE_INVALID	FE_INVALID
-    FE_DIVBYZERO = 1 << (63 - 44),
-#define FE_DIVBYZERO	FE_DIVBYZERO
-    FE_UNDERFLOW = 1 << (63 - 45),
-#define FE_UNDERFLOW	FE_UNDERFLOW
-    FE_OVERFLOW = 1 << (63 - 46)
-#define FE_OVERFLOW	FE_OVERFLOW
-  };
-
-#define FE_ALL_EXCEPT \
-	(FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
-
-/* The E500 support all of the four defined rounding modes.  We use
-   the bit pattern in the SPEFSCR as the values for the appropriate
-   macros.  */
-enum
-  {
-    FE_TONEAREST = 0,
-#define FE_TONEAREST	FE_TONEAREST
-    FE_TOWARDZERO = 1,
-#define FE_TOWARDZERO	FE_TOWARDZERO
-    FE_UPWARD = 2,
-#define FE_UPWARD	FE_UPWARD
-    FE_DOWNWARD = 3
-#define FE_DOWNWARD	FE_DOWNWARD
-  };
-
-/* Type representing exception flags.  */
-typedef unsigned int fexcept_t;
-
-typedef double fenv_t;
-
-/* If the default argument is used we use this value.  */
-extern const fenv_t __fe_dfl_env;
-#define FE_DFL_ENV	(&__fe_dfl_env)
-
-#ifdef __USE_GNU
-/* Floating-point environment where all exceptions are enabled.  Note that
-   this is not sufficient to give you SIGFPE.  */
-extern const fenv_t __fe_enabled_env;
-# define FE_ENABLED_ENV	(&__fe_enabled_env)
-
-/* Floating-point environment with all exceptions enabled.  Note that
-   just evaluating this value will set the processor into 'FPU
-   exceptions imprecise recoverable' mode, which may cause a significant
-   performance penalty (but have no other visible effect).  */
-extern const fenv_t *__fe_nomask_env (void);
-# define FE_NOMASK_ENV	(__fe_nomask_env ())
-#endif
diff --git a/libc/sysdeps/linux/powerpc/bits/e500/fenvinline.h b/libc/sysdeps/linux/powerpc/bits/e500/fenvinline.h
deleted file mode 100644
index 8dee09d18..000000000
--- a/libc/sysdeps/linux/powerpc/bits/e500/fenvinline.h
+++ /dev/null
@@ -1,2 +0,0 @@
-/* We don't need no stinking inline versions.  Life is hard enough as it
-   is with this hybrid soft/hard float business.  */
diff --git a/libc/sysdeps/linux/powerpc/bits/e500/mathdef.h b/libc/sysdeps/linux/powerpc/bits/e500/mathdef.h
deleted file mode 100644
index 4a698e96c..000000000
--- a/libc/sysdeps/linux/powerpc/bits/e500/mathdef.h
+++ /dev/null
@@ -1,84 +0,0 @@
-/* Copyright (C) 1997,1998,1999,2000,2003 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.  */
-
-#if !defined _MATH_H && !defined _COMPLEX_H
-# error "Never use <bits/mathdef.h> directly; include <math.h> instead"
-#endif
-
-
-/* FIXME! This file describes properties of the compiler, not the machine;
-   it should not be part of libc!
-
-   FIXME! This file does not deal with the -fshort-double option of
-   gcc! */
-
-#if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF
-# define _MATH_H_MATHDEF	1
-
-# ifdef __GNUC__
-#  if __STDC__ == 1
-
-/* In GNU or ANSI mode, gcc leaves `float' expressions as-is.  */
-typedef float float_t;		/* `float' expressions are evaluated as
-				   `float'.  */
-typedef double double_t;	/* `double' expressions are evaluated as
-				   `double'.  */
-
-/* Define `INFINITY' as value of type `float'.  */
-# ifndef __UCLIBC__
-#   define INFINITY	HUGE_VALF
-# endif
-
-#  else
-
-/* For `gcc -traditional', `float' expressions are evaluated as `double'. */
-typedef double float_t;		/* `float' expressions are evaluated as
-				   `double'.  */
-typedef double double_t;	/* `double' expressions are evaluated as
-				   `double'.  */
-
-/* Define `INFINITY' as value of type `float'.  */
-# ifndef __UCLIBC__
-#   define INFINITY	HUGE_VALF
-#  endif
-
-#  endif
-# else
-
-/* Wild guess at types for float_t and double_t. */
-typedef double float_t;
-typedef double double_t;
-
-/* Define `INFINITY' as value of type `float'.  */
-# ifndef __UCLIBC__
-#  define INFINITY	HUGE_VALF
-#  endif
-
-# endif
-
-/* The values returned by `ilogb' for 0 and NaN respectively.  */
-# define FP_ILOGB0	(-2147483647)
-# define FP_ILOGBNAN	(2147483647)
-
-#endif	/* ISO C99 */
-
-#ifndef __NO_LONG_DOUBLE_MATH
-/* Signal that we do not really have a `long double'.  The disables the
-   declaration of all the `long double' function variants.  */
-# define __NO_LONG_DOUBLE_MATH	1
-#endif
diff --git a/libc/sysdeps/linux/powerpc/bits/e500/mathinline.h b/libc/sysdeps/linux/powerpc/bits/e500/mathinline.h
deleted file mode 100644
index ebd8ec4a3..000000000
--- a/libc/sysdeps/linux/powerpc/bits/e500/mathinline.h
+++ /dev/null
@@ -1,2 +0,0 @@
-/* Inline?  You've got to be kidding me.  We'll take the library functions
-   any day.  */
diff --git a/libc/sysdeps/linux/powerpc/bits/classic/fenvinline.h b/libc/sysdeps/linux/powerpc/bits/fenvinline.h
index f7700a49e..f7a1a3ac1 100644
--- a/libc/sysdeps/linux/powerpc/bits/classic/fenvinline.h
+++ b/libc/sysdeps/linux/powerpc/bits/fenvinline.h
@@ -18,6 +18,13 @@
    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
    02111-1307 USA.  */
 
+#include <features.h>
+
+/*
+ * Disable for e500, uses library functions instead of in lines.
+ */
+#ifndef __CONFIG_E500__
+
 #if defined __GNUC__ && !defined _SOFT_FLOAT && !defined __NO_MATH_INLINES
 
 /* Inline definition for fegetround.  */
@@ -59,3 +66,6 @@
    : (feclearexcept) (__excepts))
 
 #endif /* __GNUC__ && !_SOFT_FLOAT */
+
+#endif /* __CONFIG_E500__ */
+
diff --git a/libc/sysdeps/linux/powerpc/bits/classic/mathdef.h b/libc/sysdeps/linux/powerpc/bits/mathdef.h
index a076fb6d7..7c7d9f7d7 100644
--- a/libc/sysdeps/linux/powerpc/bits/classic/mathdef.h
+++ b/libc/sysdeps/linux/powerpc/bits/mathdef.h
@@ -17,6 +17,8 @@
    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
    02111-1307 USA.  */
 
+#include <features.h>
+
 #if !defined _MATH_H && !defined _COMPLEX_H
 # error "Never use <bits/mathdef.h> directly; include <math.h> instead"
 #endif
@@ -64,6 +66,9 @@ typedef double double_t;
 #endif	/* ISO C99 */
 
 #ifndef __NO_LONG_DOUBLE_MATH
+#ifdef __CONFIG_E500__
+#  define __NO_LONG_DOUBLE_MATH 1
+#else
 #include <bits/wordsize.h>
 /* Signal that we do not really have a `long double'.  The disables the
    declaration of all the `long double' function variants.  */
@@ -71,5 +76,6 @@ typedef double double_t;
 #  define __NO_LONG_DOUBLE_MATH	1
 # elif !defined __UCLIBC_HAS_LONG_DOUBLE_MATH__
 #  define __NO_LONG_DOUBLE_MATH	1
-# endif
-#endif
+# endif  /* __WORDSIZE == 32 */
+# endif  /* __CONGIG_E500__ */
+# endif  /* __NO_LONG_DOUBLE_MATH */
diff --git a/libc/sysdeps/linux/powerpc/bits/classic/mathinline.h b/libc/sysdeps/linux/powerpc/bits/mathinline.h
index 87985a744..695cc3fab 100644
--- a/libc/sysdeps/linux/powerpc/bits/classic/mathinline.h
+++ b/libc/sysdeps/linux/powerpc/bits/mathinline.h
@@ -18,6 +18,13 @@
    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
    02111-1307 USA.  */
 
+#include <features.h>
+
+/*
+ * Disable for e500, uses library functions instead of in lines.
+ */
+#ifndef __CONFIG_E500__
+
 #ifndef _MATH_H
 # error "Never use <bits/mathinline.h> directly; include <math.h> instead."
 #endif
@@ -180,3 +187,6 @@ __NTH (__ieee754_sqrtf (float __x))
 }
 #endif /* __LIBC_INTERNAL_MATH_INLINES */
 #endif /* __GNUC__ && !_SOFT_FLOAT */
+
+#endif /* __CONFIG_E500__ */
+
diff --git a/libc/sysdeps/linux/powerpc/bits/sysdep.h b/libc/sysdeps/linux/powerpc/bits/sysdep.h
new file mode 100644
index 000000000..c42efbabd
--- /dev/null
+++ b/libc/sysdeps/linux/powerpc/bits/sysdep.h
@@ -0,0 +1,301 @@
+/* Copyright (C) 1992,1997-2003,2004,2005,2006 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 _LINUX_POWERPC_SYSDEP_H
+#define _LINUX_POWERPC_SYSDEP_H 1
+
+#include <sysdeps/unix/powerpc/sysdep.h>
+#include <tls.h>
+
+/* Some systen calls got renamed over time, but retained the same semantics.
+   Handle them here so they can be catched by both C and assembler stubs in
+   glibc.  */
+
+#ifdef __NR_pread64
+# ifdef __NR_pread
+#  error "__NR_pread and __NR_pread64 both defined???"
+# endif
+# define __NR_pread __NR_pread64
+#endif
+
+#ifdef __NR_pwrite64
+# ifdef __NR_pwrite
+#  error "__NR_pwrite and __NR_pwrite64 both defined???"
+# endif
+# define __NR_pwrite __NR_pwrite64
+#endif
+
+/* For Linux we can use the system call table in the header file
+	/usr/include/asm/unistd.h
+   of the kernel.  But these symbols do not follow the SYS_* syntax
+   so we have to redefine the `SYS_ify' macro here.  */
+#undef SYS_ify
+#ifdef __STDC__
+# define SYS_ify(syscall_name)	__NR_##syscall_name
+#else
+# define SYS_ify(syscall_name)	__NR_/**/syscall_name
+#endif
+
+#ifndef __ASSEMBLER__
+
+# include <errno.h>
+
+# 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
+
+# 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 VDSO
+   call. This use is for internal calls that do not need to handle errors
+   normally. It will never touch errno.
+   On powerpc a system call basically clobbers the same registers like a
+   function call, with the exception of LR (which is needed for the
+   "sc; bnslr+" sequence) and CR (where only CR0.SO is clobbered to signal
+   an error return status).  */
+# 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");				      \
+    register long int r9  __asm__ ("r9");				      \
+    register long int r10 __asm__ ("r10");				      \
+    register long int r11 __asm__ ("r11");				      \
+    register long int r12 __asm__ ("r12");				      \
+    LOADARGS_##nr (funcptr, args);					      \
+    __asm__ __volatile__						      \
+      ("mtctr %0\n\t"							      \
+       "bctrl\n\t"							      \
+       "mfcr %0"							      \
+       : "=&r" (r0),							      \
+	 "=&r" (r3), "=&r" (r4), "=&r" (r5),  "=&r" (r6),  "=&r" (r7),	      \
+	 "=&r" (r8), "=&r" (r9), "=&r" (r10), "=&r" (r11), "=&r" (r12)	      \
+       : ASM_INPUT_##nr							      \
+       : "cr0", "ctr", "lr", "memory");					      \
+    err = (long int) r0;						      \
+    (int) r3;								      \
+  })
+
+# undef INLINE_SYSCALL
+# define INLINE_SYSCALL(name, nr, args...)				\
+  ({									\
+    INTERNAL_SYSCALL_DECL (sc_err);					\
+    long int sc_ret = INTERNAL_SYSCALL (name, sc_err, nr, args);	\
+    if (INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err))			\
+      {									\
+	__set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err));		\
+	sc_ret = -1L;							\
+      }									\
+    sc_ret;								\
+  })
+
+/* 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.
+   On powerpc a system call basically clobbers the same registers like a
+   function call, with the exception of LR (which is needed for the
+   "sc; bnslr+" sequence) and CR (where only CR0.SO is clobbered to signal
+   an error return status).  */
+
+# undef INTERNAL_SYSCALL_DECL
+# define INTERNAL_SYSCALL_DECL(err) long int err
+
+# undef INTERNAL_SYSCALL
+# define INTERNAL_SYSCALL_NCS(name, err, nr, args...)			\
+  ({									\
+    register long int 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");				\
+    register long int r9  __asm__ ("r9");				\
+    register long int r10 __asm__ ("r10");				\
+    register long int r11 __asm__ ("r11");				\
+    register long int r12 __asm__ ("r12");				\
+    LOADARGS_##nr(name, args);					\
+    __asm__ __volatile__						\
+      ("sc   \n\t"							\
+       "mfcr %0"							\
+       : "=&r" (r0),							\
+	 "=&r" (r3), "=&r" (r4), "=&r" (r5),  "=&r" (r6),  "=&r" (r7),	\
+	 "=&r" (r8), "=&r" (r9), "=&r" (r10), "=&r" (r11), "=&r" (r12)	\
+       : ASM_INPUT_##nr							\
+       : "cr0", "ctr", "memory");					\
+    err = r0;								\
+    (int) r3;								\
+  })
+# 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) \
+  ((void) (val), __builtin_expect ((err) & (1 << 28), 0))
+
+# undef INTERNAL_SYSCALL_ERRNO
+# define INTERNAL_SYSCALL_ERRNO(val, err)     (val)
+
+# define LOADARGS_0(name, dummy)					      \
+	r0 = name
+# define LOADARGS_1(name, __arg1) \
+	long int arg1 = (long int) (__arg1);	\
+  LOADARGS_0(name, 0);					   \
+	extern void __illegally_sized_syscall_arg1 (void); \
+	if (__builtin_classify_type (__arg1) != 5 && sizeof (__arg1) > 4) \
+	  __illegally_sized_syscall_arg1 (); \
+	r3 = arg1
+# define LOADARGS_2(name, __arg1, __arg2) \
+	long int arg2 = (long int) (__arg2); \
+	LOADARGS_1(name, __arg1); \
+	extern void __illegally_sized_syscall_arg2 (void); \
+	if (__builtin_classify_type (__arg2) != 5 && sizeof (__arg2) > 4) \
+	  __illegally_sized_syscall_arg2 (); \
+	r4 = arg2
+# define LOADARGS_3(name, __arg1, __arg2, __arg3) \
+	long int arg3 = (long int) (__arg3); \
+	LOADARGS_2(name, __arg1, __arg2); \
+	extern void __illegally_sized_syscall_arg3 (void); \
+	if (__builtin_classify_type (__arg3) != 5 && sizeof (__arg3) > 4) \
+	  __illegally_sized_syscall_arg3 (); \
+	r5 = arg3
+# define LOADARGS_4(name, __arg1, __arg2, __arg3, __arg4) \
+	long int arg4 = (long int) (__arg4); \
+	LOADARGS_3(name, __arg1, __arg2, __arg3); \
+	extern void __illegally_sized_syscall_arg4 (void); \
+	if (__builtin_classify_type (__arg4) != 5 && sizeof (__arg4) > 4) \
+	  __illegally_sized_syscall_arg4 (); \
+	r6 = arg4
+# define LOADARGS_5(name, __arg1, __arg2, __arg3, __arg4, __arg5) \
+	long int arg5 = (long int) (__arg5); \
+	LOADARGS_4(name, __arg1, __arg2, __arg3, __arg4); \
+	extern void __illegally_sized_syscall_arg5 (void); \
+	if (__builtin_classify_type (__arg5) != 5 && sizeof (__arg5) > 4) \
+	  __illegally_sized_syscall_arg5 (); \
+	r7 = arg5
+# define LOADARGS_6(name, __arg1, __arg2, __arg3, __arg4, __arg5, __arg6) \
+	long int arg6 = (long int) (__arg6); \
+	LOADARGS_5(name, __arg1, __arg2, __arg3, __arg4, __arg5); \
+	extern void __illegally_sized_syscall_arg6 (void); \
+	if (__builtin_classify_type (__arg6) != 5 && sizeof (__arg6) > 4) \
+	  __illegally_sized_syscall_arg6 (); \
+	r8 = arg6
+
+# define ASM_INPUT_0 "0" (r0)
+# define ASM_INPUT_1 ASM_INPUT_0, "1" (r3)
+# define ASM_INPUT_2 ASM_INPUT_1, "2" (r4)
+# define ASM_INPUT_3 ASM_INPUT_2, "3" (r5)
+# define ASM_INPUT_4 ASM_INPUT_3, "4" (r6)
+# define ASM_INPUT_5 ASM_INPUT_4, "5" (r7)
+# define ASM_INPUT_6 ASM_INPUT_5, "6" (r8)
+
+#endif /* __ASSEMBLER__ */
+
+
+/* Pointer mangling support.  */
+#if defined NOT_IN_libc && defined IS_IN_rtld
+/* We cannot use the thread descriptor because in ld.so we use setjmp
+   earlier than the descriptor is initialized.  */
+#else
+# ifdef __ASSEMBLER__
+#  define PTR_MANGLE(reg, tmpreg) \
+	lwz	tmpreg,POINTER_GUARD(r2); \
+	xor	reg,tmpreg,reg
+#  define PTR_MANGLE2(reg, tmpreg) \
+	xor	reg,tmpreg,reg
+#  define PTR_MANGLE3(destreg, reg, tmpreg) \
+	lwz	tmpreg,POINTER_GUARD(r2); \
+	xor	destreg,tmpreg,reg
+#  define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg)
+#  define PTR_DEMANGLE2(reg, tmpreg) PTR_MANGLE2 (reg, tmpreg)
+#  define PTR_DEMANGLE3(destreg, reg, tmpreg) PTR_MANGLE3 (destreg, reg, tmpreg)
+# else
+#  define PTR_MANGLE(var) \
+  (var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
+#  define PTR_DEMANGLE(var)	PTR_MANGLE (var)
+# endif
+#endif
+
+#endif /* linux/powerpc/powerpc32/sysdep.h */