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/* SBL used memory, use only for uninitalized sections */
MSRAM_SBL : ORIGIN = 0x70000000 , LENGTH = 0x60000
2. 将未初始化的/NoLoad 段(如.bss、.stack)分配给这个新创建的段
/* This is rest of uninitialized data. This can be placed in DDR if DDR is available and needed */
GROUP {
.bss: {} palign(8) /* This is where uninitialized globals go */
RUN_START(__BSS_START)
RUN_END(__BSS_END)
.sysmem: {} palign(8) /* This is where the malloc heap goes */
.stack: {} palign(8) /* This is where the main() stack goes */
} > MSRAM_SBL
