Add command line option support for Sail->C compiled models

For example, the MIPS model can boot FreeBSD as

./mips_c --binary=0x100000,/path/to/kernel --image=/path/to/simboot.sailbin

Or with short options as

./mips_c -b 0x100000,/path/to/kernel -i /path/to/simboot.sailbin

The current options are:
-e, --elf, which loads an elf file directly
-n, --entry, which sets the entry point
-i, --image, which loads an image file compiled by "sail -elf" using Linksem
-b, --binary, which loads a plain binary image into memory at a specific address
-l, --cyclelimit, which means the (new) cycle_count() builtin exits the model after a certain number of calls

Also there are the default -? --help and --usage options.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/c_backend.ml b/src/c_backend.ml
index f58dd71f..450e5f5d 100644
--- a/src/c_backend.ml
+++ b/src/c_backend.ml
@@ -3374,8 +3374,8 @@ let compile_ast ctx (Defs defs) =
     let postamble = separate hardline (List.map string
        ( [ "int main(int argc, char *argv[])";
            "{";
-           "  if (argc > 1) { load_image(argv[1]); }";
-           "  setup_rts();" ]
+           "  setup_rts();";
+           "  if (process_arguments(argc, argv)) exit(EXIT_FAILURE);" ]
        @ fst exn_boilerplate
        @ startup cdefs
        @ List.concat (List.map (fun r -> fst (register_init_clear r)) regs)