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patches/gcc/4.1.2/200-arm-bigendian.patch
author Michael Hope <michael.hope@linaro.org>
Wed Oct 19 15:27:32 2011 +1300 (2011-10-19)
changeset 2739 f320e22f2cba
parent 13 068dce39f687
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 --- gcc-4.1.2.orig/gcc/config/arm/linux-elf.h	2007-03-04 23:25:37.000000000 +0100

     2 +++ gcc-4.1.2/gcc/config/arm/linux-elf.h	2007-03-04 23:35:09.000000000 +0100

     3 @@ -28,19 +28,33 @@

     4  #undef  TARGET_VERSION

     5  #define TARGET_VERSION  fputs (" (ARM GNU/Linux with ELF)", stderr);

     6  

     7 +/*

     8 + * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-*

     9 + * (big endian) configurations.

    10 + */

    11 +#if TARGET_BIG_ENDIAN_DEFAULT

    12 +#define TARGET_ENDIAN_DEFAULT MASK_BIG_END

    13 +#define TARGET_ENDIAN_OPTION "mbig-endian"

    14 +#define TARGET_LINKER_EMULATION "armelfb_linux"

    15 +#else

    16 +#define TARGET_ENDIAN_DEFAULT 0

    17 +#define TARGET_ENDIAN_OPTION "mlittle-endian"

    18 +#define TARGET_LINKER_EMULATION "armelf_linux"

    19 +#endif

    20 +

    21  #undef  TARGET_DEFAULT_FLOAT_ABI

    22  #define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_HARD

    23  

    24  #undef  TARGET_DEFAULT

    25 -#define TARGET_DEFAULT (0)

    26 +#define TARGET_DEFAULT (TARGET_ENDIAN_DEFAULT)

    27  

    28  #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6

    29  

    30 -#define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux -p"

    31 +#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION " -p"

    32  

    33  #undef  MULTILIB_DEFAULTS

    34  #define MULTILIB_DEFAULTS \

    35 -	{ "marm", "mlittle-endian", "mhard-float", "mno-thumb-interwork" }

    36 +	{ "marm", TARGET_ENDIAN_OPTION, "mhard-float", "mno-thumb-interwork" }

    37  

    38  /* Now we define the strings used to build the spec file.  */

    39  #undef  LIB_SPEC

    40 @@ -65,7 +79,7 @@

    41     %{rdynamic:-export-dynamic} \

    42     %{!dynamic-linker:-dynamic-linker " LINUX_TARGET_INTERPRETER "} \

    43     -X \

    44 -   %{mbig-endian:-EB}" \

    45 +   %{mbig-endian:-EB} %{mlittle-endian:-EL}" \

    46     SUBTARGET_EXTRA_LINK_SPEC

    47  

    48  #undef  LINK_SPEC

    49 --- gcc-4.1.2.orig/gcc/config.gcc	2007-03-04 23:31:48.000000000 +0100

    50 +++ gcc-4.1.2/gcc/config.gcc	2007-03-04 23:35:09.000000000 +0100

    51 @@ -672,6 +672,11 @@

    52  	;;

    53  arm*-*-linux*)			# ARM GNU/Linux with ELF

    54  	tm_file="dbxelf.h elfos.h linux.h arm/elf.h arm/linux-gas.h arm/linux-elf.h" 

    55 +	case $target in

    56 +	arm*b-*)

    57 +		tm_defines="${tm_defines} TARGET_BIG_ENDIAN_DEFAULT=1"

    58 +		;;

    59 +	esac

    60  	tmake_file="${tmake_file} t-linux arm/t-arm"

    61  	case ${target} in

    62  	arm*-*-linux-gnueabi | arm*-*-linux-uclibcgnueabi)

    63 --- gcc-4.1.2.orig/gcc/config/arm/linux-eabi.h	2007-03-04 23:31:48.000000000 +0100

    64 +++ gcc-4.1.2/gcc/config/arm/linux-eabi.h	2007-03-04 23:35:09.000000000 +0100

    65 @@ -20,6 +20,17 @@

    66     the Free Software Foundation, 51 Franklin Street, Fifth Floor,

    67     Boston, MA 02110-1301, USA.  */

    68  

    69 +/*

    70 + * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-*

    71 + * (big endian) configurations.

    72 + */

    73 +#undef TARGET_LINKER_EMULATION

    74 +#if TARGET_BIG_ENDIAN_DEFAULT

    75 +#define TARGET_LINKER_EMULATION "armelfb_linux_eabi"

    76 +#else

    77 +#define TARGET_LINKER_EMULATION "armelf_linux_eabi"

    78 +#endif

    79 +

    80  /* On EABI GNU/Linux, we want both the BPABI builtins and the

    81     GNU/Linux builtins.  */

    82  #undef TARGET_OS_CPP_BUILTINS

    83 @@ -48,7 +59,7 @@

    84  #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm10tdmi

    85  

    86  #undef SUBTARGET_EXTRA_LINK_SPEC

    87 -#define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux_eabi"

    88 +#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION

    89  

    90  /* Use ld-linux.so.3 so that it will be possible to run "classic"

    91     GNU/Linux binaries on an EABI system.  */

    92 --- gcc-4.1.2.orig/gcc/config/arm/bpabi.h	2005-12-13 02:35:37.000000000 +0100

    93 +++ gcc-4.1.2/gcc/config/arm/bpabi.h	2007-03-04 23:35:09.000000000 +0100

    94 @@ -33,9 +33,19 @@

    95  #undef FPUTYPE_DEFAULT

    96  #define FPUTYPE_DEFAULT FPUTYPE_VFP

    97  

    98 +/*

    99 + * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-*

   100 + * (big endian) configurations.

   101 + */

   102 +#if TARGET_BIG_ENDIAN_DEFAULT

   103 +#define TARGET_ENDIAN_DEFAULT MASK_BIG_END

   104 +#else

   105 +#define TARGET_ENDIAN_DEFAULT 0

   106 +#endif

   107 +

   108  /* EABI targets should enable interworking by default.  */

   109  #undef TARGET_DEFAULT

   110 -#define TARGET_DEFAULT MASK_INTERWORK

   111 +#define TARGET_DEFAULT (MASK_INTERWORK | TARGET_ENDIAN_DEFAULT)

   112  

   113  /* The ARM BPABI functions return a boolean; they use no special

   114     calling convention.  */
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