[PATCH 1/1] ARM: thumb: Fix thumb mode compilation problems.
From: Russell King - ARM Linux <hidden>
Date: 2011-05-16 09:26:51
On Fri, May 13, 2011 at 12:58:58PM -0700, Vadim Bendebury wrote:
quoted hunk ↗ jump to hunk
@@ -99,15 +99,24 @@ void __naked set_fiq_regs(struct pt_regs *regs) register unsigned long tmp; asm volatile ( "mov ip, sp\n\ - stmfd sp!, {fp, ip, lr, pc}\n\ + sub sp, sp, #8\n\ + stmfd sp!, {fp, ip}\n\ + str lr, [sp, #8]\n\ + str pc, [sp, #12]\n\
This breaks the ARM mode backtracing. ARM mode stack frames must be created using the three instructions given in the original. Do we really have any Thumb-2 capable CPUs using FIQ support?