Feature/calling conv systemv #515
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Note: lot of code is duplicated here, but due to Sandbox class hierarchy, merging them is not trivial (for now)
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Introduce a "naive" SystemV calling convention in jitters.
With it, linux stubs now uses the SystemV convention, as referenced in #321, #355.
In addition, a stub for
libc_start_mainhas been added. As a consequence, one can now runs linux binary from their very beginning, with support for argument and environment variables in Sandbox (using the--mimic-envoption, because the stack layout has to looks like the one coming from the loader).Finally, a new API
Sandbox.callhas been added, for the common usage: "Call this function with this parameters".