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patches/glibc/2.7/130-i686-assembler.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 If gcc is configured to generate i686 code or better by default (like

     2 when using the --with-arch=pentium3 configure option), then the __i686

     3 macro will always be defined automatically and thus screw up the

     4 compilation of some .S files.

     5 

     6 http://bugs.gentoo.org/131108

     7 http://sourceware.org/ml/libc-alpha/2006-04/msg00090.html

     8 

     9 2006-04-25  Mike Frysinger  <vapier@gentoo.org>

    10 

    11 	* sysdeps/i386/sysdep.h (__i686): Undefine.

    12 

    13 Index: glibc-2.4/sysdeps/unix/sysv/linux/i386/sysdep.h

    14 ===================================================================

    15 --- glibc-2.4/sysdeps/unix/sysv/linux/i386/sysdep.h	(revision 1469)

    16 +++ glibc-2.4/sysdeps/unix/sysv/linux/i386/sysdep.h	(working copy)

    17 @@ -29,6 +29,10 @@

    18  #include <dl-sysdep.h>

    19  #include <tls.h>

    20 

    21 +#if defined __i686 && defined __ASSEMBLER__

    22 +#undef __i686

    23 +#define __i686 __i686

    24 +#endif

    25 

    26  /* For Linux we can use the system call table in the header file

    27  	/usr/include/asm/unistd.h

    28 Index: glibc-2.4/nptl/sysdeps/pthread/pt-initfini.c

    29 ===================================================================

    30 --- glibc-2.4/nptl/sysdeps/pthread/pt-initfini.c	(revision 1469)

    31 +++ glibc-2.4/nptl/sysdeps/pthread/pt-initfini.c	(working copy)

    32 @@ -45,6 +45,11 @@

    33  /* Embed an #include to pull in the alignment and .end directives. */

    34  asm ("\n#include \"defs.h\"");

    35 

    36 +asm ("\n#if defined __i686 && defined __ASSEMBLER__");

    37 +asm ("\n#undef __i686");

    38 +asm ("\n#define __i686 __i686");

    39 +asm ("\n#endif");

    40 +

    41  /* The initial common code ends here. */

    42  asm ("\n/*@HEADER_ENDS*/");

    43
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