lib/utils/gchelper_m3: Add gc_helper_get_sp() function.
.section .text
.align 2
+ .global gc_helper_get_sp
+ .type gc_helper_get_sp, %function
+
+@ uint gc_helper_get_sp(void)
+gc_helper_get_sp:
+ @ return the sp
+ mov r0, sp
+ bx lr
+
+ .size gc_helper_get_sp, .-gc_helper_get_sp
+
+
.global gc_helper_get_regs_and_sp
.type gc_helper_get_regs_and_sp, %function
