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Received: from ki1.chemie.fu-berlin.de (ki1.Chemie.FU-Berlin.DE [160.45.24.21]) by nacm.com (8.6.10/8.6.9) with SMTP id OAA16129 for <executor@nacm.com>; Fri, 8 Sep 1995 14:25:44 -0700 Received: by ki1.chemie.fu-berlin.de (Smail3.1.28.1) from leibniz.math.fu-berlin.de (160.45.40.10) with smtp id <m0srAum-0000a3C>; Fri, 8 Sep 95 23:24 MEST Received: by leibniz.math.fu-berlin.de (/\=-/\ Smail3.1.18.1 #18.14) id <m0srAul-000sObC>; Fri, 8 Sep 95 23:24 MET DST Message-Id: <m0srAul-000sObC@leibniz.math.fu-berlin.de> From: wojtek@math.fu-berlin.de (Wojciech Was) Subject: Re: Svga & Linux -- workaround To: executor@nacm.com Date: Fri, 8 Sep 1995 23:24:46 +0200 (MET DST) Reply-To: wojtek@math.fu-berlin.de In-Reply-To: <m0sr4yu-000GOkC@gwar.ardi.com> from "Mat Hostetter" at Sep 8, 95 09:04:00 am X-Mailer: ELM [version 2.4 PL22] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 8bit Content-Length: 1886 Sender: owner-paper@nacm.com Precedence: bulk For those, who cannot wait for 1.99o8 and other happy experimenters. > Here's a message from the linux-svgalib mailing list yesterday, from ........... > > I'll investigate further, but if I don't find a simple solution I'll make > > vga_safety_fork a noop until a working solution is found. ........... A quick'n'dirty workaround: Create a LD_PRELOAD object which patches vga_safety_fork away. Something like: $ cat > no_safety_fork.c void no_safety_fork () {} ^D $ gcc -b i486-linuxaout -O2 -fomit-frame-pointer -c -o foo.o no_safety_fork.c $ ld -m i386linux -x -Ttext 0x50000000 -o no_safety_fork.o foo.o -lvga \ -u __PLT__vga_safety_fork \ -defsym preload_no_safety_fork=__PLT__vga_safety_fork Move the resulting object (no_safety_fork.o) where you keep the a.out libs and start executor with: $ LD_AOUT_PRELOAD=<path_to_no_safety_fork.o> executor-svga Some ancient ld.so's will require LD_PRELOAD (without the AOUT). It works for me (sort of) on Trio64 (S3-like thing), I still need to restore the textmode on return from executor. For further information read the file ld-so/example/README.preload in the ld.so distribution. As the above is a big kludge of unknown value, I am _not_ responsible for anything with respect to it. - Wojtek ------------------------------------------------------------- begin 755 no_safety_fork.o.gz M'XL("`($43`"`VYO7W-A9F5T>5]F;W)K+F\`[=HQ3\)0$`?P4S3&R0Z,#@P, M3@TP$`<'@=:`:8"T[)="BR$B);0:W-R<3%C\`&Z.C&X..AKCQW'TRGMH$[\` MP_^77._>>]>FZWOM!P5$!JD0SQ(%HBYI;XO%8CSJWUSX9AR99;(<IW!^?34M ME,W*=%PE`````````-A\1=GKEU;[_>7@D[:(C.5@O28C^CY0X^WTB,"@;MY0 M9P/I&AE_YP0`````````L+EV)'9)??//2][3^_IBIC[1];'4KJZ/I![I^E#J MN7[.J3SG+E/?2]Z7:$K/@^ZWI'[,S#])SDE\Y9:#ETS/:Z;G73)/(H[]89C< M\C":71(SJU\3N,R54E7&;=NV//::KM.J_ZZE?5ZSYMH6R[1;<UNVQTQJLE9W M;&YTVF=.J]%3T]SH=5QI]7JK89B$\X36B<-)D%X#/_$E]^.8X\2?)32=A>/( 1#_Z]H^Y,;_L!_P^(6&PA``"K ` end