Hi Rob, > make: *** No rule to make target > `powerpc64-bgq-linux/rt/arch/powerpc64/morestack.o', needed by > `powerpc64-bgq-linux/rt/libsmorestack.a'. Stop. > > I don't know how to go about debugging this. Any ideas?
There is no way to "debug" this - you have to implement a couple of functions which are required by Rust runtime and are architecture-dependent. They live in src/rt/arch/$ARCH_NAME$ Functions (files) are: morestack (morestack.S) - it is a vestige from segmented stack time. Back then it allocated a new stack segment once were wasn't enough space in the current one. Nowadays it just calls rust_stack_exhausted function. record_sp_limit (record_sp.S) - should store stack limit for current task (usually it uses platform specific thread local storage). get_sp_limit (record_sp.S) - should return stack limit for current task (reads from the same platform-specific thread local storage) rust_swap_registers (_context.S) - I'm not sure about this one, but I assume it allows correct register restoration in case of green task switches. rust_bootstrap_green_task (_context.S) - again, not sure, but I assume it initializes green task. Note, that all stack-related functions (morestack, record_sp_limit, get_sp_limit) should be actually compatible with LLVM segmented stack prologue (in your case consult $LLVM/lib/target/PowerPC/PPCFrameLowering.cpp, emitPrologue and emitEpilogue methods, may be a couple of others). For a reference implementations (and much more additional comments) see src/rt/arch/i386/*.S -- Valerii
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