Date: Sun, 30 Apr 2000 10:12:04 +0100 (BST) From: Doug Rabson <dfr@nlsystems.com> To: Steve Price <sprice@hiwaay.net> Cc: freebsd-alpha@freebsd.org Subject: Re: need help porting JDK2 to alpha Message-ID: <Pine.BSF.4.21.0004301011500.79607-100000@salmon.nlsystems.com> In-Reply-To: <Pine.OSF.4.21.0004291305380.18420-100000@fly.HiWAAY.net>
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On Sat, 29 Apr 2000, Steve Price wrote: > On Mon, 24 Apr 2000, Doug Rabson wrote: > > # You can initialise the pc by setting sc->sc_pc. What are death_func and > # arg used for? If these are intended to be arguments to some function > # located at *pc, you can initialise sc->sc_regs[R_A0..R-A5] with up to six > # argument values. If you need the function at *pc to return to some > # specific location, set sc->sc_regs[R_RA] to a suitable return address. > > Oops, I was re-reading your response and just noticed there was > a question in there. The idea is to setup the sigjmp_buf structure > so that on a call to siglongjmp the function death_func is called with > the arguments pc and arg. The code I have now looks like this and > appears to almost work. > > uc->jmpbuf->_sjb[2] = death_func; /* sc_pc */ > uc->jmpbuf->_sjb[20] = pc; /* sc_regs[R_A0] */ > uc->jmpbuf->_sjb[21] = arg; /* sc_regs[R_A1] */ > uc->jmpbuf->_sjb[34] = sp; /* sc_regs[R_SP] */ > uc->jmpbuf->_sjb[35] = 0xACEDBADD; /* magic number for longjmp */ > > I don't think we need to set sc_regs[R_RA]. This looks right. Lets hope it works :-) -- Doug Rabson Mail: dfr@nlsystems.com Nonlinear Systems Ltd. Phone: +44 20 8442 9037 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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