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how to link executable to discontinuous flash area

I am using uVision4.74 with STM32F407, I want to link my program to two sections, one section is 0x8000000 length 0x4000, and the other section is 0x8008000 length 0x38000. I did the setup in the options form Taget 'whatsoever', but the linked file used 0x8000000~0x80006AC and 0x8008000~0x08017C00

Is it a bug in the linker? It wasted so many space in section 1.

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