From: Nicolas Pitre Date: Sat, 14 Jan 2006 16:18:08 +0000 (+0000) Subject: [ARM] 3102/1: ARM EABI: stack pointer must be 64-bit aligned after a CPU exception X-Git-Tag: v2.6.16-rc1~107^2~11 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2dede2d8e925f4c2cb4e136b14df127685e15dd3;p=pandora-kernel.git [ARM] 3102/1: ARM EABI: stack pointer must be 64-bit aligned after a CPU exception Patch from Nicolas Pitre The ARM EABI says that the stack pointer has to be 64-bit aligned for reasons already mentioned in patch #3101 when calling C functions. We therefore must verify and adjust sp accordingly when taking an exception from kernel mode since sp might not necessarily be 64-bit aligned if the exception occurs in the middle of a kernel function. If the exception occurs while in user mode then no sp fixup is needed as long as sizeof(struct pt_regs) as well as any additional syscall data stack space remain multiples of 8. Signed-off-by: Nicolas Pitre Signed-off-by: Russell King --- Reading git-diff-tree failed