[ARM] 3524/1: ARM EABI: more 64-bit aligned stack fixes

Patch from Nicolas Pitre

Assembly code that calls C code must ensure the C code sees a 64-bit
aligned stack pointer.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/lib/backtrace.S b/arch/arm/lib/backtrace.S
index 3bdc8c6..16153c8 100644 (file)
--- a/arch/arm/lib/backtrace.S
+++ b/arch/arm/lib/backtrace.S
@@ -122,7 +122,7 @@ ENTRY(c_backtrace)
 #define reg   r5
 #define stack r6
 
-.Ldumpstm:     stmfd   sp!, {instr, reg, stack, r7, lr}
+.Ldumpstm:     stmfd   sp!, {instr, reg, stack, r7, r8, lr}
                mov     stack, r0
                mov     instr, r1
                mov     reg, #9
@@ -145,7 +145,7 @@ ENTRY(c_backtrace)
                adrne   r0, .Lcr
                blne    printk
                mov     r0, stack
-               LOADREGS(fd, sp!, {instr, reg, stack, r7, pc})
+               LOADREGS(fd, sp!, {instr, reg, stack, r7, r8, pc})
 
 .Lfp:          .asciz  " r%d = %08X%c"
 .Lcr:          .asciz  "\n"

diff --git a/arch/arm/lib/div64.S b/arch/arm/lib/div64.S
index ec9a1cd..58eef66 100644 (file)
--- a/arch/arm/lib/div64.S
+++ b/arch/arm/lib/div64.S
@@ -189,12 +189,12 @@ ENTRY(__do_div64)
        moveq   pc, lr
 
        @ Division by 0:
-       str     lr, [sp, #-4]!
+       str     lr, [sp, #-8]!
        bl      __div0
 
        @ as wrong as it could be...
        mov     yl, #0
        mov     yh, #0
        mov     xh, #0
-       ldr     pc, [sp], #4
+       ldr     pc, [sp], #8