.text.globl _start_start:mov ip, spstmdb sp!, {r11, ip, lr, pc}bl app_funcldmia sp, {r11, sp, lr}bx lr.globl app_funcapp_func:mov ip, spstmdb sp!, {r11, ip, lr, pc}bl app_func2ldmia sp, {r11, sp, lr}bx lr.globl app_func2app_func2:bx lr