jit: Assertion while running aes.elf

[jserv]

The assertion error occurs when the JIT-enabled emulator is executing the aes.elf program:

Assertion failed: (state->offset <= state->size - len), function emit_bytes, file jit.c, line 281.

The way to reproduce:

$ make ENABLE_JIT=1 distclean all
...
AES-128 FPE decryption: PASSED!
AES-128 key wrapping  : PASSED!
AES-128 key unwrapping: PASSED!
+-> Let's do some extra tests
Assertion failed: (state->offset <= state->size - len), function emit_bytes, file jit.c, line 281.

Without JIT compiler, it is able to run:

$ make ENABLE_JIT=0 distclean all
$ build/rv32emu build/aes.elf
...
AES-128 EAX encryption: PASSED!
AES-128 EAX decryption: PASSED!
AES-128 Poly1305 auth.: PASSED!
AES-128 Poly1305 auth.: PASSED!
inferior exit code 0

[qwe661234]

This issue occurs because we have not handled the scenario when the code cache is full.

[jserv]

Close to emphasize #365