[Sbcl-devel] LOAD-FOREIGN ?

[Daniel B. <da...@te...>]

The commentary in src/code/foreign.lisp indicates that dynamic loading
was disabled in SBCL.  Cursory fiddling indicates that all that is
required to get it working again is to

1) uncomment it, and 

2) for a CMUCL-compatible interface, implement RUN-PROGRAM, which is
used to run ld(1) (to agglomerate the user-supplied object file with
the relevant libraries) then

3) it would ne nice to fix the probable security hole caused by using
an easily guessable filename in /tmp


Note that even without RUN-PROGRAM, step (1) on its own is useful
functionality as it means we can load shared libraries:

$ cc    -c -o get_h_errno.o get_h_errno.c
$ ld -shared -o get_h_errno.so get_h_errno.o

* (load-object-file "/home/dan/src/telent/sockets/get_h_errno.so")

(#.(INT-SAP #X08264D28) #.(INT-SAP #X400130D0))


Most of the weird stuff with a.out and SOM et cetera doesn't apply to
systems with dlsym(), and I don't think that SBCL currently runs on
any such (freebsd is ELF these days, right?).



-dan

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