rrthomas / bee Goto Github PK

Currently this causes a compilation failure. One solution that would not complicate the relevant trap ABIs (LIBC_LSEEK, LIBC_RESIZE_FILE, LIBC_FILE_SIZE) would be to check return values from system calls and throw an error if the offset cannot be represented.

• Add simulator for Bee.
• Source-level debugging for Gnat/Forth. Either a) via ELF support, but then would Bee have to be wired into ld.so? (Investigate what that would take) or b) via GDB's JIT support (provide a .so that gdb can load and use to navigate compiled code to extract symbol and stack frame information).
• Add support for gdb's file command.

Copy (and possibly improve) fix from mmv.

These functions would be useful for debugging Bee itself, to use e.g. in vm.c. They could also make it easier for motivated users to track down bugs!

Hello,

The README.md file claims Bee is a "minimal virtual machine". I'm curious what minimal means here?

FYI, I have written a Forth VM with just 13 instructions, which is why I'm interested in this kind of thing.
https://github.com/larsbrinkhoff/nybbleForth

Thanks to Eli Zaretskii for raising this question. As it says in the GDB manual: "In the below the exact meaning of signal number is defined by the header include/gdb/signals.h in the GDB source code." So in other words I should be using signal codes from that header file, not native signal codes.

Currently the instructions still end with the suffix R and the macros with _RETURN. Oops!

Simple version of Mit's encoding (thanks, @apt1002 for reminding me of this option): reserve the bottom two bits of the opcode to indicate a rest-of-word instruction; otherwise, decode only one byte.

This can be used in a simple-minded way by only choosing one of two options: either use the whole word, or only use byte instructions. Actually requiring this seems attractive, because then byte opcodes in other than the first byte could use the full 8 bits, but this complicates the decoder.

To be able to get away with "only" 64 instructions, will first need traps à la Mit.

Could either designate TRAP 0, or allow GDB to specify some unused trap value.

Use a src/Makefile.am fragment as for a typical autoconf dir variable with sed.

With continue it works fine.

I am trying to build bee from source on Mac OS X (Monterey 12.2.1) using ./bootstrap and get the following failure:

Don't forget to
  - add "lib/Makefile" to AC_CONFIG_FILES in ./configure.ac,
  - mention "lib" in SUBDIRS in Makefile.am,
  - mention "-I m4" in ACLOCAL_AMFLAGS in Makefile.am,
  - mention "m4/gnulib-cache.m4" in EXTRA_DIST in Makefile.am,
  - invoke gl_EARLY in ./configure.ac, right after AC_PROG_CC_C99,
  - invoke gl_INIT in ./configure.ac.
bootstrap: running: autoreconf --symlink --install
/Library/Developer/CommandLineTools/usr/bin/gm4: unrecognized option `--gnu'
Try `/Library/Developer/CommandLineTools/usr/bin/gm4 --help' for more information.
autom4te: error: /usr/bin/gm4 failed with exit status: 1
aclocal: error: autom4te failed with exit status: 1
autoreconf: error: aclocal failed with exit status: 1

I can build the distribution tarball fine.

Add stack access instructions of Mit (see rrthomas/mit#406).