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patches/glibc/2.7/210-alpha-ptr_mangle.patch
author Michael Hope <michael.hope@linaro.org>
Wed Oct 19 15:27:32 2011 +1300 (2011-10-19)
changeset 2739 f320e22f2cba
parent 744 4bf8448536d5
permissions -rw-r--r--
arch: add softfp support

Some architectures support a mixed hard/soft floating point, where
the compiler emits hardware floating point instructions, but passes
the operands in core (aka integer) registers.

For example, ARM supports this mode (to come in the next changeset).

Add support for softfp cross compilers to the GCC and GLIBC
configuration. Needed for Ubuntu and other distros that are softfp.

Signed-off-by: Michael Hope <michael.hope@linaro.org>
[yann.morin.1998@anciens.enib.fr: split the original patch]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> 
     1 --- glibc-2.7.orig/sysdeps/unix/alpha/sysdep.h

     2 +++ glibc-2.7/sysdeps/unix/alpha/sysdep.h

     3 @@ -397,42 +397,4 @@

     4  	_sc_ret = _sc_0, _sc_err = _sc_19;			\

     5  }

     6  

     7 -/* Pointer mangling support.  Note that tls access is slow enough that

     8 -   we don't deoptimize things by placing the pointer check value there.  */

     9 -

    10 -#include <stdint.h>

    11 -

    12 -#if defined NOT_IN_libc && defined IS_IN_rtld

    13 -# ifdef __ASSEMBLER__

    14 -#  define PTR_MANGLE(dst, src, tmp)				\

    15 -	ldah	tmp, __pointer_chk_guard_local($29) !gprelhigh;	\

    16 -	ldq	tmp, __pointer_chk_guard_local(tmp) !gprellow;	\

    17 -	xor	src, tmp, dst

    18 -#  define PTR_MANGLE2(dst, src, tmp)				\

    19 -	xor	src, tmp, dst

    20 -#  define PTR_DEMANGLE(dst, tmp)   PTR_MANGLE(dst, dst, tmp)

    21 -#  define PTR_DEMANGLE2(dst, tmp)  PTR_MANGLE2(dst, dst, tmp)

    22 -# else

    23 -extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden;

    24 -#  define PTR_MANGLE(var)	\

    25 -  (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard_local)

    26 -#  define PTR_DEMANGLE(var)  PTR_MANGLE(var)

    27 -# endif

    28 -#elif defined PIC

    29 -# ifdef __ASSEMBLER__

    30 -#  define PTR_MANGLE(dst, src, tmp)		\

    31 -	ldq	tmp, __pointer_chk_guard;	\

    32 -	xor	src, tmp, dst

    33 -#  define PTR_MANGLE2(dst, src, tmp)		\

    34 -	xor	src, tmp, dst

    35 -#  define PTR_DEMANGLE(dst, tmp)   PTR_MANGLE(dst, dst, tmp)

    36 -#  define PTR_DEMANGLE2(dst, tmp)  PTR_MANGLE2(dst, dst, tmp)

    37 -# else

    38 -extern uintptr_t __pointer_chk_guard attribute_relro;

    39 -#  define PTR_MANGLE(var)	\

    40 -	(var) = (void *) ((uintptr_t) (var) ^ __pointer_chk_guard)

    41 -#  define PTR_DEMANGLE(var)  PTR_MANGLE(var)

    42 -# endif

    43 -#endif

    44 -

    45  #endif /* ASSEMBLER */

    46 --- glibc-2.7.orig/sysdeps/unix/sysv/linux/alpha/sysdep.h

    47 +++ glibc-2.7/sysdeps/unix/sysv/linux/alpha/sysdep.h

    48 @@ -98,4 +98,46 @@

    49  	INTERNAL_SYSCALL1(name, err_out, nr, args);			\

    50  })

    51  

    52 +/* Pointer mangling support.  Note that tls access is slow enough that

    53 +   we don't deoptimize things by placing the pointer check value there.  */

    54 +

    55 +#if defined NOT_IN_libc && defined IS_IN_rtld

    56 +# ifdef __ASSEMBLER__

    57 +#  define PTR_MANGLE(dst, src, tmp)				\

    58 +	ldah	tmp, __pointer_chk_guard_local($29) !gprelhigh;	\

    59 +	ldq	tmp, __pointer_chk_guard_local(tmp) !gprellow;	\

    60 +	xor	src, tmp, dst

    61 +#  define PTR_MANGLE2(dst, src, tmp)				\

    62 +	xor	src, tmp, dst

    63 +#  define PTR_DEMANGLE(dst, tmp)   PTR_MANGLE(dst, dst, tmp)

    64 +#  define PTR_DEMANGLE2(dst, tmp)  PTR_MANGLE2(dst, dst, tmp)

    65 +# else

    66 +extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden;

    67 +#  define PTR_MANGLE(var)	\

    68 +  (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard_local)

    69 +#  define PTR_DEMANGLE(var)  PTR_MANGLE(var)

    70 +# endif

    71 +#elif defined PIC

    72 +# ifdef __ASSEMBLER__

    73 +#  define PTR_MANGLE(dst, src, tmp)		\

    74 +	ldq	tmp, __pointer_chk_guard;	\

    75 +	xor	src, tmp, dst

    76 +#  define PTR_MANGLE2(dst, src, tmp)		\

    77 +	xor	src, tmp, dst

    78 +#  define PTR_DEMANGLE(dst, tmp)   PTR_MANGLE(dst, dst, tmp)

    79 +#  define PTR_DEMANGLE2(dst, tmp)  PTR_MANGLE2(dst, dst, tmp)

    80 +# else

    81 +extern uintptr_t __pointer_chk_guard attribute_relro;

    82 +#  define PTR_MANGLE(var)	\

    83 +	(var) = (void *) ((uintptr_t) (var) ^ __pointer_chk_guard)

    84 +#  define PTR_DEMANGLE(var)  PTR_MANGLE(var)

    85 +# endif

    86 +#else

    87 +/* Pointer mangling is not yet supported for static libc on alpha.  */

    88 +# ifndef __ASSEMBLER__

    89 +#  define PTR_MANGLE(var)   (void) (var)

    90 +#  define PTR_DEMANGLE(var) (void) (var)

    91 +# endif

    92 +#endif

    93 +

    94  #endif /* _LINUX_ALPHA_SYSDEP_H */
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