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b8083f86e8
linux/arch/arm
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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
..
boot ARM: 7666/1: decompressor: add -mno-single-pic-base for building the decompressor 2013-03-06 23:45:42 +00:00
common
configs arm-soc: mvebu platform changes 2013-02-28 20:09:24 -08:00
crypto
include ARM: 7665/1: Wire up kcmp syscall 2013-03-03 22:54:18 +00:00
kernel ARM: 7665/1: Wire up kcmp syscall 2013-03-03 22:54:18 +00:00
kvm ARM: KVM: fix compilation after removal of user_alloc from struct kvm_memory_slot 2013-02-25 11:48:41 +02:00
lib ARM: 7653/2: do not scale loops_per_jiffy when using a constant delay clock 2013-02-21 13:25:36 +00:00
mach-at91 Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-bcm
mach-bcm2835 arm-soc: soc-specific updates 2013-02-21 15:27:22 -08:00
mach-clps711x
mach-cns3xxx
mach-davinci Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-dove arm-soc: mvebu platform changes 2013-02-28 20:09:24 -08:00
mach-ebsa110
mach-ep93xx
mach-exynos Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-footbridge
mach-gemini
mach-h720x
mach-highbank Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-imx arm-soc: i.MX DT changes 2013-02-28 19:59:34 -08:00
mach-integrator Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-iop13xx Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-iop32x
mach-iop33x
mach-ixp4xx
mach-kirkwood arm-soc: mvebu platform changes 2013-02-28 20:09:24 -08:00
mach-ks8695 Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-l7200/include/mach
mach-lpc32xx
mach-mmp Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-msm Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-mv78xx0 Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-mvebu arm-soc: mvebu platform changes 2013-02-28 20:09:24 -08:00
mach-mxs arm-soc: device tree conversions 2013-02-21 15:38:49 -08:00
mach-netx ARM: 7642/1: netx: bump IRQ offset to 64 2013-03-03 22:54:11 +00:00
mach-nomadik Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-omap1 Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-omap2 arm-soc: late OMAP changes 2013-02-28 20:00:40 -08:00
mach-orion5x Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-picoxcell
mach-prima2 Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-pxa Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-realview arm-soc: cleanups 2013-02-21 14:58:40 -08:00
mach-rpc
mach-s3c24xx Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-s3c64xx Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-s5p64x0 arm-soc: cleanups 2013-02-21 14:58:40 -08:00
mach-s5pc100
mach-s5pv210 Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2013-02-24 17:35:10 -08:00
mach-sa1100 Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-shark
mach-shmobile IOMMU Updates for Linux v3.9 2013-02-26 11:09:17 -08:00
mach-socfpga Merge branch 'socfpga/hw' into next/soc 2013-02-11 19:37:51 -08:00
mach-spear3xx Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma 2013-02-26 09:24:48 -08:00
mach-spear6xx Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma 2013-02-26 09:24:48 -08:00
mach-spear13xx Revert "ARM: SPEAr13xx: Pass DW DMAC platform data from DT" 2013-02-20 15:48:02 +05:30
mach-sunxi Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-tegra Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-u300 Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-ux500 Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-versatile Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-vexpress Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-virt ARM: mach-virt: fixup machine descriptor after removal of sys_timer 2013-02-11 10:39:30 -08:00
mach-vt8500 arm-soc: soc-specific updates 2013-02-21 15:27:22 -08:00
mach-w90x900 arm-soc: cleanups 2013-02-21 14:58:40 -08:00
mach-zynq
mm ARM: 7661/1: mm: perform explicit branch predictor maintenance when required 2013-03-03 22:54:16 +00:00
net ARM: net: bpf_jit: fix emit_swap16() for non ARMv6+. 2013-02-14 13:26:44 -05:00
nwfpe
oprofile
plat-iop
plat-omap arm-soc: late OMAP changes 2013-02-28 20:00:40 -08:00
plat-orion arm-soc: cleanups 2013-02-21 14:58:40 -08:00
plat-pxa
plat-samsung Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
plat-spear arm-soc: driver specific changes 2013-02-21 15:12:18 -08:00
plat-versatile Merge branch 'for-arm-soc/arch-timers' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into kvm-arm/timer 2013-02-11 19:03:52 +00:00
tools
vfp ARM: Fix broken commit 0cc41e4a21 corrupting kernel messages 2013-03-01 21:09:59 +00:00
xen xen: implement updated XENMEM_add_to_physmap_range ABI 2013-02-19 22:01:55 -05:00
Kconfig arm-soc: late OMAP changes 2013-02-28 20:00:40 -08:00
Kconfig-nommu
Kconfig.debug arm-soc: soc-specific updates 2013-02-21 15:27:22 -08:00
Makefile arm-soc: virtualization changes 2013-02-21 15:40:16 -08:00