From: lehmann@ans-netz.de (Oliver Lehmann)
Subject: [TUHS] Introduction
Date: Sun, 29 Jun 2008 10:25:23 +0200 [thread overview]
Message-ID: <20080629102523.0219a85c.lehmann@ans-netz.de> (raw)
In-Reply-To: <20080627142430.57e0a9c4@veda.cnb.uam.es>
Jose R. Valverde wrote:
> Why don't you try to split the assignment into various statements
> to reproduce the assembly and the recombine them? Like, e.g.
>
> 1: r2 = uap->linkname; /* ldl rr2,rr8(#4) */
> 2: r4 = (long) r2; /* ldl rr4,rr2 */
> 3: r4 &= 0x7F00FFFF; /* and rr4,#32512 */
> 4: u.u_dirp.l = (caddr_t) r4; /* ldl _u+78, rr4 */
hm.. this won't work because the compiler starts handing out registers
the register-declared variables with the highest register possible so
would start with rr10 or so.
> u.u_dirp.l = (caddr_t) ((long) (((saddr_t) uap->linkname).l) & 0x7F00FFFF);
I've changed it to:
u.u_dirp.l = (caddr_t) ((long) (((saddr_t *) uap->linkname)->l) & 0x7F00FFFF);
otherwise it won't compile. It compiles to:
ldl rr2,rr8(#4)
ldl rr4, at rr2
and r4,#32512
ldl _u+78,rr4
is it because I added a * and changed . to ->?
> u.u_dirp = (saddr_t) (((long) uap->linkname) & 0x7F00FFFF);
this generates:
"sys2.c":305: operands of CAST have incompatible types
"sys2.c":305: operands of "=" have incompatible types
:(
--
Oliver Lehmann
http://www.pofo.de/
http://wishlist.ans-netz.de/
next prev parent reply other threads:[~2008-06-29 8:25 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-04 11:57 Jose R. Valverde
2008-06-04 15:11 ` Oliver Lehmann
2008-06-04 15:16 ` Oliver Lehmann
2008-06-05 15:07 ` Jose R. Valverde
2008-06-05 17:59 ` Oliver Lehmann
2008-06-05 15:17 ` Jose R. Valverde
2008-06-05 17:45 ` Oliver Lehmann
2008-06-23 14:18 ` Jose R. Valverde
2008-06-23 16:11 ` Oliver Lehmann
2008-06-25 9:40 ` Jose R. Valverde
2008-06-25 10:25 ` Jose R. Valverde
2008-06-26 14:52 ` Oliver Lehmann
2008-06-27 12:24 ` Jose R. Valverde
2008-06-29 8:25 ` Oliver Lehmann [this message]
2008-06-30 9:30 ` Jose R. Valverde
2008-06-30 17:34 ` Oliver Lehmann
2008-07-01 14:21 ` Jose R. Valverde
2008-07-01 18:35 ` Oliver Lehmann
2008-07-03 10:12 ` Jose R. Valverde
2008-07-06 16:14 ` Oliver Lehmann
2008-07-07 9:25 ` [TUHS] SysIII/PDP-11 on SIMH (was Re: Introduction) Jose R. Valverde
2008-07-07 9:32 ` [TUHS] Introduction Jose R. Valverde
2008-07-07 14:45 ` Oliver Lehmann
2008-06-06 9:58 ` Jose R. Valverde
-- strict thread matches above, loose matches on Subject: below --
2008-06-03 4:18 Oliver Lehmann
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