From 4c0742f65b4ee466546fd24b71b56516cacd4613 Mon Sep 17 00:00:00 2001 From: Vladimir Murzin Date: Thu, 10 Oct 2019 10:12:20 +0100 Subject: ARM: 8914/1: NOMMU: Fix exc_ret for XIP It was reported that 72cd4064fcca "NOMMU: Toggle only bits in EXC_RETURN we are really care of" breaks NOMMU+XIP combination. It happens because saved EXC_RETURN gets overwritten when data section is relocated. The fix is to propagate EXC_RETURN via register and let relocation code to commit that value into memory. Fixes: 72cd4064fcca ("ARM: 8830/1: NOMMU: Toggle only bits in EXC_RETURN we are really care of") Reported-by: afzal mohammed Tested-by: afzal mohammed Signed-off-by: Vladimir Murzin Signed-off-by: Russell King --- arch/arm/mm/proc-v7m.S | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'arch/arm/mm') diff --git a/arch/arm/mm/proc-v7m.S b/arch/arm/mm/proc-v7m.S index 1448f144e7fb..efebf4120a0c 100644 --- a/arch/arm/mm/proc-v7m.S +++ b/arch/arm/mm/proc-v7m.S @@ -136,9 +136,8 @@ __v7m_setup_cont: cpsie i svc #0 1: cpsid i - ldr r0, =exc_ret - orr lr, lr, #EXC_RET_THREADMODE_PROCESSSTACK - str lr, [r0] + /* Calculate exc_ret */ + orr r10, lr, #EXC_RET_THREADMODE_PROCESSSTACK ldmia sp, {r0-r3, r12} str r5, [r12, #11 * 4] @ restore the original SVC vector entry mov lr, r6 @ restore LR -- cgit v1.2.3