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patches/gcc/4.2.0/240-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 111 2e16b9fc302d
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 By Lennert Buytenhek <buytenh@wantstofly.org>

     2 Adds support for arm*b-linux* big-endian ARM targets

     3 

     4 See http://gcc.gnu.org/PR16350

     5 

     6 --- gcc-4.2.0/gcc/config/arm/linux-elf.h

     7 +++ gcc-4.2.0/gcc/config/arm/linux-elf.h

     8 @@ -28,19 +28,33 @@

     9  #undef  TARGET_VERSION

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

    11  

    12 +/*

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

    14 + * (big endian) configurations.

    15 + */

    16 +#if TARGET_BIG_ENDIAN_DEFAULT

    17 +#define TARGET_ENDIAN_DEFAULT MASK_BIG_END

    18 +#define TARGET_ENDIAN_OPTION "mbig-endian"

    19 +#define TARGET_LINKER_EMULATION "armelfb_linux"

    20 +#else

    21 +#define TARGET_ENDIAN_DEFAULT 0

    22 +#define TARGET_ENDIAN_OPTION "mlittle-endian"

    23 +#define TARGET_LINKER_EMULATION "armelf_linux"

    24 +#endif

    25 +

    26  #undef  TARGET_DEFAULT_FLOAT_ABI

    27  #define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_HARD

    28  

    29  #undef  TARGET_DEFAULT

    30 -#define TARGET_DEFAULT (0)

    31 +#define TARGET_DEFAULT (TARGET_ENDIAN_DEFAULT)

    32  

    33  #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6

    34  

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

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

    37  

    38  #undef  MULTILIB_DEFAULTS

    39  #define MULTILIB_DEFAULTS \

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

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

    42  

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

    44  #undef  LIB_SPEC

    45 @@ -61,7 +75,7 @@

    46     %{rdynamic:-export-dynamic} \

    47     %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER "} \

    48     -X \

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

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

    51     SUBTARGET_EXTRA_LINK_SPEC

    52  

    53  #undef  LINK_SPEC

    54 --- gcc-4.2.0/gcc/config.gcc.orig	2006-09-22 14:53:41.000000000 +0200

    55 +++ gcc-4.2.0/gcc/config.gcc	2006-09-25 10:45:21.000000000 +0200

    56 @@ -696,6 +696,11 @@

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

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

    59  	case ${target} in

    60 +	arm*b-*)

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

    62 +		;;

    63 +	esac

    64 +	case ${target} in

    65  	arm*-*-linux-*eabi)

    66  	    tm_file="$tm_file arm/bpabi.h arm/linux-eabi.h"

    67  	    tmake_file="$tmake_file arm/t-arm-elf arm/t-bpabi arm/t-linux-eabi"
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