; <h> Stack Configuration
; <o> Stack Size (in Bytes) <0x0-0xFFFFFFFF:8>
; </h>
Stack_Size EQU 0x00000400 //设置栈的大小为1024
AREA STACK, NOINIT, READWRITE, ALIGN=3 //设置STACK数据段，对齐字节为2的
Stack_Mem SPACE Stack_Size //3次方，定义栈空间，大小为Stack_Size
__initial_sp //栈顶
; <h> Heap Configuration
; <o> Heap Size (in Bytes) <0x0-0xFFFFFFFF:8>
; </h>
Heap_Size EQU 0x00000200 //堆空间，只是定义大小，并没有绝对地址
AREA HEAP, NOINIT, READWRITE, ALIGN=3
__heap_base //堆头
Heap_Mem SPACE Heap_Size
__heap_limit //堆尾
PRESERVE8 //8字节对齐
THUMB //采用Thumb代码执行
; Vector Table Mapped to Address 0 at Reset
AREA RESET, DATA, READONLY //定义RESET代码段，只读
EXPORT __Vectors //定义Vectors全局变量
//为Vectors初始化，内容是各个中断向量，一般存放在Flash0
__Vectors DCD __initial_sp ; Top of Stack
DCD Reset_Handler ; Reset Handler
DCD NMI_Handler ; NMI Handler
DCD HardFault_Handler ; Hard Fault Handler
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD SVC_Handler ; SVCall Handler
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD PendSV_Handler ; PendSV Handler
DCD SysTick_Handler ; SysTick Handler
; External Interrupts
DCD FLEX_INT0_IRQHandler ; All GPIO pin can be routed to FLEX_INTx
DCD FLEX_INT1_IRQHandler
DCD FLEX_INT2_IRQHandler
DCD FLEX_INT3_IRQHandler
DCD FLEX_INT4_IRQHandler
DCD FLEX_INT5_IRQHandler
DCD FLEX_INT6_IRQHandler
DCD FLEX_INT7_IRQHandler
DCD GINT0_IRQHandler
DCD GINT1_IRQHandler ; PIO0 (0:7)
DCD Reserved_IRQHandler ; Reserved
DCD Reserved_IRQHandler
DCD Reserved_IRQHandler
DCD Reserved_IRQHandler
DCD SSP1_IRQHandler ; SSP1
DCD I2C_IRQHandler ; I2C
DCD TIMER16_0_IRQHandler ; 16-bit Timer0
DCD TIMER16_1_IRQHandler ; 16-bit Timer1
DCD TIMER32_0_IRQHandler ; 32-bit Timer0
DCD TIMER32_1_IRQHandler ; 32-bit Timer1
DCD SSP0_IRQHandler ; SSP0
DCD UART_IRQHandler ; UART
DCD USB_IRQHandler ; USB IRQ
DCD USB_FIQHandler ; USB FIQ
DCD ADC_IRQHandler ; A/D Converter
DCD WDT_IRQHandler ; Watchdog timer
DCD BOD_IRQHandler ; Brown Out Detect
DCD FMC_IRQHandler ; IP2111 Flash Memory Controller
DCD Reserved_IRQHandler ; Reserved
DCD Reserved_IRQHandler ; Reserved
DCD USBWakeup_IRQHandler ; USB wake up
DCD Reserved_IRQHandler ; Reserved
IF :LNOT::DEF:NO_CRP //如果没有定义NO_CRP，则定义代码段如下
AREA |.ARM.__at_0x02FC|, CODE, READONLY
;DCD 0xFFFFFFFF
CRP_Key DCD 0x4E697370 //NO_ISP
ENDIF
AREA |.text|, CODE, READONLY
; Reset Handler
//weak表示如果其他文件有定义该函数则用其他文件的，否则用本文件的
Reset_Handler PROC //定义子程序Reset_Handler
EXPORT Reset_Handler [WEAK]
IMPORT SystemInit
IMPORT __main
LDR R0, =SystemInit //先执行SystemInit
BLX R0
LDR R0, =__main //执行库提供的_main函数，初始化操作
BX R0
ENDP
; Dummy Exception Handlers (infinite loops which can be modified)
; now, under COMMON NMI.c and NMI.h, a real NMI handler is created if NMI is enabled
; for particular peripheral.
;NMI_Handler PROC
; EXPORT NMI_Handler [WEAK]
; B .
; ENDP
HardFault_Handler\
PROC
EXPORT HardFault_Handler [WEAK]
B .
ENDP
SVC_Handler PROC
EXPORT SVC_Handler [WEAK]
B .
ENDP
PendSV_Handler PROC
EXPORT PendSV_Handler [WEAK]
B .
ENDP
SysTick_Handler PROC
EXPORT SysTick_Handler [WEAK]
B .
ENDP
Reserved_IRQHandler PROC
EXPORT Reserved_IRQHandler [WEAK]
B .
ENDP
Default_Handler PROC
EXPORT NMI_Handler [WEAK]
EXPORT FLEX_INT0_IRQHandler [WEAK]
EXPORT FLEX_INT1_IRQHandler [WEAK]
EXPORT FLEX_INT2_IRQHandler [WEAK]
EXPORT FLEX_INT3_IRQHandler [WEAK]
EXPORT FLEX_INT4_IRQHandler [WEAK]
EXPORT FLEX_INT5_IRQHandler [WEAK]
EXPORT FLEX_INT6_IRQHandler [WEAK]
EXPORT FLEX_INT7_IRQHandler [WEAK]
EXPORT GINT0_IRQHandler [WEAK]
EXPORT GINT1_IRQHandler [WEAK]
EXPORT SSP1_IRQHandler [WEAK]
EXPORT I2C_IRQHandler [WEAK]
EXPORT TIMER16_0_IRQHandler [WEAK]
EXPORT TIMER16_1_IRQHandler [WEAK]
EXPORT TIMER32_0_IRQHandler [WEAK]
EXPORT TIMER32_1_IRQHandler [WEAK]
EXPORT SSP0_IRQHandler [WEAK]
EXPORT UART_IRQHandler [WEAK]
EXPORT USB_IRQHandler [WEAK]
EXPORT USB_FIQHandler [WEAK]
EXPORT ADC_IRQHandler [WEAK]
EXPORT WDT_IRQHandler [WEAK]
EXPORT BOD_IRQHandler [WEAK]
EXPORT FMC_IRQHandler [WEAK]
EXPORT USBWakeup_IRQHandler [WEAK]
NMI_Handler
FLEX_INT0_IRQHandler
FLEX_INT1_IRQHandler
FLEX_INT2_IRQHandler
FLEX_INT3_IRQHandler
FLEX_INT4_IRQHandler
FLEX_INT5_IRQHandler
FLEX_INT6_IRQHandler
FLEX_INT7_IRQHandler
GINT0_IRQHandler
GINT1_IRQHandler
SSP1_IRQHandler
I2C_IRQHandler
TIMER16_0_IRQHandler
TIMER16_1_IRQHandler
TIMER32_0_IRQHandler
TIMER32_1_IRQHandler
SSP0_IRQHandler
UART_IRQHandler
USB_IRQHandler
USB_FIQHandler
ADC_IRQHandler
WDT_IRQHandler
BOD_IRQHandler
FMC_IRQHandler
USBWakeup_IRQHandler //这些中断服务函数都是weak，如果用户有重写则用用户的，否则用该文件的
B . //该文件中定义的中断服务函数都是死循环
ENDP
ALIGN
; User Initial Stack & Heap
IF :DEF:__MICROLIB //_MICROLIB属于keil库的，在target\c c++中设置
EXPORT __initial_sp
EXPORT __heap_base
EXPORT __heap_limit
ELSE
IMPORT __use_two_region_memory
EXPORT __user_initial_stackheap
__user_initial_stackheap
LDR R0, = Heap_Mem
LDR R1, =(Stack_Mem + Stack_Size)
LDR R2, = (Heap_Mem + Heap_Size)
LDR R3, = Stack_Mem
BX LR
ALIGN
ENDIF
END
Stack和Heap的绝对地址是有编译器编译后才能决定，累加.bss和data块的大小后才是堆栈地址的起始位置。
各个文件所占具体资源可在.map文件中查看