David, Do you expect the Dalvik VM would need modifications for MIPS? If so, would it be similar to the changes necessary for bionic (replace some ARM assembler functions/macros with MIPS assembler functions/macros) or would it be more involved?
Thanks, Peter On Mar 28, 2009, at 1:19 AM, David Turner wrote: > > > On Fri, Mar 27, 2009 at 9:04 AM, zhou <bismack...@gmail.com> wrote: > > Can anybody share some knowledges about the toolchain? > Looks like it is based on the gcc 4.2.1. > I have tried to diff it against the standard gcc-4.2.1 release, but > get an farely large patch.... > > What are the main changes and their purpose? > > most, if not all, the changes are fixes that have been inserted into > later versions of GCC. > I would not worry to much about this toolchain. > > > If we need to port Android to MIPS system, what kind of further > changes are needed? > > Since you'll be starting from scratch, you should select the best > gcc-based toolchain you have > (probably try a recent one), then modify the build system files to > support "mips" as a valid TARGET_ARCH, > this probably requires writing a custom build/core/combo/linux- > mips.mk file. > > After that, you should port the C library, which requires various > assembler-languages fragments, most > of these would be available from one of the BSD's projects for you. > This will also require mips-specific > Linux kernel headers. > > Then port the dynamic linker (bionic/linker) to support MIPS > relocations. > > The emulator doesn't support MIPS, but you may be able to add a > directory external/qemu/target-mips > directory by taking the sources from upstream qemu to do that, you > will also need a file named > external/qemu/hw/android_mips.c to initialize your virtual machine. > > After this is done, things should be a lot simpler to test and > gradually improve. > > Hope this helps > > > > > Thanks > > > > > --~--~---------~--~----~------------~-------~--~----~ unsubscribe: android-porting+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-porting -~----------~----~----~----~------~----~------~--~---
