Date: Sat, 29 Apr 2000 13:21:51 -0500 (CDT) From: Steve Price <sprice@hiwaay.net> To: Doug Rabson <dfr@nlsystems.com> Cc: freebsd-alpha@freebsd.org Subject: Re: need help porting JDK2 to alpha Message-ID: <Pine.OSF.4.21.0004291305380.18420-100000@fly.HiWAAY.net> In-Reply-To: <Pine.BSF.4.21.0004241232400.62105-100000@salmon.nlsystems.com>
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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].
-steve
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