[U-Boot] gcc 4.3.5 and uboot 1.1.4.54 not working, uboot crashed

Hello.

I just compiled uboot from gcc 4.3.5. When the uboot is running, it crashed at ath_reg_wr_nf(), which is the SPI register write function. If I comment it out, the uboot will keep going until it crashed again at ath_pci_write_config(), which is PCI register write. Both of two call #define ath_reg_wr(_phys, _val) do { \ ath_reg_wr_nf(_phys, _val); \ ath_reg_rd(_phys); \

#define ath_reg_wr_nf(_phys, _val) \ ((*(volatile ath_reg_t *)KSEG1ADDR(_phys)) = (_val))

However When I use gcc 4.2.4 to compile the same uboot code, it works fun. Any idea about what's going on here? I assume it must be related to BUS configuration issue...

Thanks,

-George