Hi TK, thanks for offering to help. I now pushed a GCC-portable version of Tom's stack check to freecom's git: https://github.com/FDOS/freecom
However if you try to compile it you'll see once you run it that it says 0 stack left quite quickly. The reason is not the stack (there is plenty) but the heap which grows towards the stack. The default heap is very small though (6K), still it grows much further than OW's (with OW the stack is below the heap though but I debugged it a few times). You can easily make it bigger in build.sh, with 8K metados boots. I tried to limit heap grow a bit using a patch to nanomalloc https://gist.github.com/f45f2874b16afd8957d019db6182067e which basically takes any free block at the end into account when it needs to grow the heap via sbrk, so it does not leave a hole there. Anyway, even with that and 8K, "tests oberon16" in metados still fails. With OW command.com "tests oberon16" finishes (although it reports "BEF - bad command or file name" in the beginning), but if I run it twice the second one fails with invalid opcodes (ie. memory corruption). I'll debug this some more to see if older freecoms had this issue too. Bart _______________________________________________ Freedos-devel mailing list Freedos-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-devel
