Jonathan Austin b8083f86e8 ARM: 7666/1: decompressor: add -mno-single-pic-base for building the decompressor ... Before jumping to (position independent) C-code from the decompressor's assembler world we set-up the C environment. This setup currently does not set r9, which for arm-none-uclinux-uclibceabi toolchains is by default expected to be the PIC offset base register (IE should point to the beginning of the GOT). Currently, therefore, in order to build working kernels that use the decompressor it is necessary to use an arm-linux-gnueabi toolchain, or similar. uClinux toolchains cause a prefetch abort to occur at the beginning of the decompress_kernel function. This patch allows uClinux toolchains to build bootable zImages by forcing the -mno-single-pic-base option, which ensures that the location of the GOT is re-derived each time it is required, and r9 becomes free for use as a general purpose register. This has a small (4% in instruction terms) advantage over the alternative of setting r9 to point to the GOT before calling into the C-world. Signed-off-by: Jonathan Austin <jonathan.austin@arm.com> Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>		2013-03-06 23:45:42 +00:00
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bootp	ARM: 6499/1: Thumb-2: Correct data alignment for CONFIG_THUMB2_KERNEL in bootp/init.S	2010-11-30 13:44:24 +00:00
compressed	ARM: 7666/1: decompressor: add -mno-single-pic-base for building the decompressor	2013-03-06 23:45:42 +00:00
dts	arm-soc: mvebu platform changes	2013-02-28 20:09:24 -08:00
.gitignore	ARM: devicetree: Add .dtb files to arch/arm/boot/.gitignore	2012-01-30 11:47:37 -07:00
install.sh	kbuild: use INSTALLKERNEL to select customized installkernel script	2009-09-20 12:18:14 +02:00
Makefile	ARM: 7656/1: uImage: Error out on build of multiplatform without LOADADDR	2013-02-23 14:06:27 +00:00