Hi All, I was reading the boot code for MIPS. in head.S file before jumping to 'start_kernel' it calculate the stack pointer address as follow: " PTR_LA $28, init_thread_union PTR_ADDIU sp, $28, _THREAD_SIZE - 32 set_saved_sp sp, t0, t1 PTR_SUBU sp, 4 * SZREG # init stack pointer " Can anyone please explains me this 4 lines of code? Why ' _THREAD_SIZE - 32' is added in 'sp' ? What 'set_saved_sp' will do ? and then why we subtract '4 * SZREG' from 'sp' ? Please hep me to understand this code better. Thanks, Chetan Nanda
