[PATCH 7/7] arm: add configurable AEABI support

[Sascha Hauer]

On Mon, Nov 02, 2009 at 07:51:31PM +0100, Jean-Christophe PLAGNIOL-VILLARD wrote:
> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
> ---
>  arch/arm/Kconfig  |   15 +++++++++++++++
>  arch/arm/Makefile |    8 +++++++-
>  2 files changed, 22 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index 1ce216a..00c443d 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -54,6 +54,21 @@ source arch/arm/mach-netx/Kconfig
>  source arch/arm/mach-omap/Kconfig
>  source arch/arm/mach-s3c24xx/Kconfig
>  
> +config AEABI
> +	bool "Use the ARM EABI to compile the kernel"

We should use u-boot and not kernel here.

Sascha

> +	help
> +	  This option allows for the kernel to be compiled using the latest
> +	  ARM ABI (aka EABI).  This is only useful if you are using a user
> +	  space environment that is also compiled with EABI.
> +
> +	  Since there are major incompatibilities between the legacy ABI and
> +	  EABI, especially with regard to structure member alignment, this
> +	  option also changes the kernel syscall calling convention to
> +	  disambiguate both ABIs and allow for backward compatibility support
> +	  (selected with CONFIG_OABI_COMPAT).
> +
> +	  To use this you need GCC version 4.0.0 or later.
> +
>  endmenu
>  
>  menu "Arm specific settings         "
> diff --git a/arch/arm/Makefile b/arch/arm/Makefile
> index 87783cb..55c2dc3 100644
> --- a/arch/arm/Makefile
> +++ b/arch/arm/Makefile
> @@ -27,7 +27,13 @@ arch-$(CONFIG_CPU_32v4T)	:=-D__LINUX_ARM_ARCH__=4 -march=armv4t
>  tune-$(CONFIG_CPU_ARM920T)	:=-mtune=arm9tdmi
>  tune-$(CONFIG_CPU_ARM926T)	:=-mtune=arm9tdmi
>  
> -CPPFLAGS += $(arch-y) $(tune-y)
> +ifeq ($(CONFIG_AEABI),y)
> +CFLAGS_ABI	:=-mabi=aapcs-linux -mno-thumb-interwork
> +else
> +CFLAGS_ABI	:=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-thumb-interwork,)
> +endif
> +
> +CPPFLAGS += $(CFLAGS_ABI) $(arch-y) $(tune-y)
>  
>  # Machine directory name.  This list is sorted alphanumerically
>  # by CONFIG_* macro name.
> -- 
> 1.6.5
> 
> 
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> 

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