crt0.s

来自「俄罗斯高人Mamaich的Pocket gcc编译器（运行在PocketPC上）」· S 代码 · 共 55 行

@ arm-crt0.s

@ already defined...	
@sp	.req	r13
@lr	.req	r14
@pc	.req	r15

	.text

	.globl ___EH_FRAME_BEGIN__
	.globl WinMainCRTStartup

@ for kernel exception handler		
	.globl ___EH_HANDLER__
	.globl ___EH_CODE_START__
	.globl ___eh_continue
		
	.extern __startup
	.extern __eh_handler
	
@ dummy, needed for eh!?

___EH_FRAME_BEGIN__: .word 0

@ for kernel exception handler, must be directly before ___EH_CODE_START__
___EH_HANDLER__:		
	.word __eh_handler
	.word 0
		
___EH_CODE_START__:		
WinMainCRTStartup:
	stmdb sp!, {r11, lr}
	ldr r11, __PStartup
	mov lr, pc
	mov pc, r11
	ldmia sp!, {r11, pc}

__PStartup: .word __startup

@ Args:	r0: context pointer	
___eh_continue:
	mov r1, r0
	ldr r0, [r1, #4]
	ldr r11, [r1, #48]
	ldr r12, [r1, #52]
	ldr sp, [r1, #56]
	ldr lr, [r1, #60]
	ldr pc, [r1, #64]
		
@ for kernel exception handler
	.section .pdata
	.word ___EH_CODE_START__
@ max 22 bits for number of instructions
	.word 0xc0000002 | (0xFFFFF << 8)