Hi Stefan, > Hello, > We have been looking at protecting U-Boot from (malicious) TFTP > overwrites. We want to do this after our ARMv7 U-Boot has relocated. > > The memory map looks like this (I hope): > > --------------------------- Top of DRAM > | U-Boot (Protected) > | -------------------------- U_Boot_start > | Heap (Protected) > | -------------------------- Start_Heap = U_Boot_start - Heap_Size > | Stack (Protected) > | -------------------------- Start_Stack = Start_Heap - Stack_Size > | Buffers (Protected) > | -------------------------- ??? > | Free DRAM (Not Protected) > --------------------------- Start of DRAM > > I seem to get lost in the code trying to find possible buffers, can > you please give a hint how I can find the address "???"
By default the tftp writes its data to the address pointed by the "loadaddr" env variable. printenv loadaddr > > Best Regards, > Stefan > > _______________________________________________ > U-Boot mailing list > [email protected] > https://lists.denx.de/listinfo/u-boot Best regards, Lukasz Majewski -- DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: [email protected]
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