这段汇编是啥意思？

只看该作者 · 2011-6-17 14:51

ISR_Stack_Size  EQU    (UND_Stack_Size + SVC_Stack_Size + ABT_Stack_Size + \
                     FIQ_Stack_Size + IRQ_Stack_Size + USR_Stack_Size)
            AREA Stack, NOINIT, READWRITE, ALIGN=3
Stack_Top  SPACE 0
__initial_sp EQU    (Stack_Top - ISR_Stack_Size)

;Stack_Top 对应0了，意味着__initial_sp  是负数？
;汇编中加__ 如（__initial_sp ）是什么意思

只看该作者 · 2011-6-17 17:52

UND_Stack_Size  EQU    0x00000100
SVC_Stack_Size  EQU    0x00000400
ABT_Stack_Size  EQU    0x00000100
FIQ_Stack_Size  EQU    0x00000100
IRQ_Stack_Size  EQU    0x00000100
USR_Stack_Size  EQU    0x00000100

ISR_Stack_Size  EQU    (UND_Stack_Size + SVC_Stack_Size + ABT_Stack_Size + \
                     FIQ_Stack_Size + IRQ_Stack_Size + USR_Stack_Size)

            AREA Stack, NOINIT, READWRITE, ALIGN=3
Stack_Top SPACE 0

__initial_sp EQU    (Stack_Top - ISR_Stack_Size)