patches/gcc/4.2.4/241-arm-bigendian2.patch
author Michael Hope <michael.hope@linaro.org>
Wed Oct 19 15:27:32 2011 +1300 (2011-10-19)
changeset 2739 f320e22f2cba
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>
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Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org> wrote:
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I tried to use crosstool-ng to generate a toolchain for Linux on big
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endian arm with recent versions of gcc, glibc, etc... but had a few
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problems.
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It appears that the gcc patch (for gcc 4.2.x)
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for big-endian arm (240-arm-bigendian.patch) lacks the change attached
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to this mail as 240-arm-bigendian2.patch.
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--- gcc-4.2.4/gcc/config/arm/bpabi.h~	2007-09-01 17:28:30.000000000 +0200
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+++ gcc-4.2.4/gcc/config/arm/bpabi.h	2009-01-05 19:19:10.000000000 +0100
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@@ -32,9 +32,19 @@
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 #undef FPUTYPE_DEFAULT
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 #define FPUTYPE_DEFAULT FPUTYPE_VFP
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+/*
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+ * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-*
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+ * (big endian) configurations.
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+ */
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+#if TARGET_BIG_ENDIAN_DEFAULT
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+#define TARGET_ENDIAN_DEFAULT MASK_BIG_END
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+#else
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+#define TARGET_ENDIAN_DEFAULT 0
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+#endif
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+
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 /* EABI targets should enable interworking by default.  */
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 #undef TARGET_DEFAULT
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-#define TARGET_DEFAULT MASK_INTERWORK
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+#define TARGET_DEFAULT (MASK_INTERWORK | TARGET_ENDIAN_DEFAULT)
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 /* The ARM BPABI functions return a boolean; they use no special
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    calling convention.  */