warning: creating output section "vectors" without a SECTIONS specification warning: creating ".stack" section with default size of 0x3e8; use the -stack option to change the default size warning: creating ".sysstack" secti

1. cmd文件里的.vectors段名墙面是带"."，你代码里定义的应该是vectors前面不带"."，两者名字不一样，所以会出现这个warning.

2. .stack, .sysstack这两个warning没关系，只是提醒你stack大小用了编译器默认值。 

-stack 0x400

-heap 0x800

MEMORY
{
PAGE 0:
PROG0(RWX) : origin = 04000h length = 08000h
P_VECT(RIX) : origin = 00200h length = 00100h
PAGE 1:
DATA0(RW) : origin = 0C000h length = 04000h
}

SECTIONS
{

vectors : { } > P_VECT PAGE 0
.text : { } > PROG0 PAGE 0
.cinit : { } > PROG0 PAGE 0 
.csldata : { } > DATA0 PAGE 1
.stack : { } > DATA0 PAGE 1 
.sysstack : { } > DATA0 PAGE 1
.bss : { } > DATA0 PAGE 1 
.cio : { } > DATA0 PAGE 1
.const : { } > DATA0 PAGE 1
.sysmem : { } > DATA0 PAGE 1 
}

OK.