On 26 May 2017 at 01:02, Pankaj Bansal <[email protected]> wrote: > Hello Edk2 team, > > We are facing a compilation error in our ARMV8 based NXP board. > We are using c model small with GCC49 and GCC5. > > "WriteSections64(): %s due to its size (> 1 MB), this module requires 4 KB > section alignment." > > With below GCC options, this error is not observed > > [BuildOptions] > GCC:*_*_AARCH64_CC_FLAGS = -mcmodel=small > + GCC:*_*_AARCH64_DLINK_FLAGS = -z common-page-size=0x1000 > > My question is, is this necessary to use page size 4K with c model small ? >
Yes. The small C model relies on ADRP instructions, which require the link time and load time offsets of the executable to be equal modulo 4096. > P.S : This compilation error is not observed with default GCC49/GCC5 options > (i.e. C Model tiny and Page Size 0x20) > The tiny C model does not have this limitation because it uses ADR instructions instead, whose range is limited to 1 MB. The PE/COFF conversion tool will convert small C model code to tiny C model code if it can, i.e., if the module size < 1 MB. For bigger modules, this is not possible, which is when you get the error above. _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
