improve Makefile, README.md, .gitignore, code, bugs.md for 2004/gavin
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@@ -1 +1,5 @@
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fs.tar
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gavin
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kernel
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sh
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vi
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+293
-299
@@ -1,362 +1,356 @@
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#!/bin/make
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#!/usr/bin/env make
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#
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# 2004 makefile
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# IOCCC 2004 winning entry - gavin
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################################################################################
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#
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# Copyright (C) 2004, Landon Curt Noll, Simon Cooper, Peter Seebach
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# and Leonid A. Broukhis. All Rights Reserved. Permission for personal,
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# educational or non-profit use is granted provided this copyright and
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# notice are included in its entirety and remains unaltered. All other
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# uses must receive prior permission from the contest judges.
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# Regarding individual entries:
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||||
#
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# IOCCC winning entry code may not work on your system. Even with standards,
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# conditions and build environments change, especially when it comes to more
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# extreme code such you might find in an IOCCC winner. Moreover, what was
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# allowed and liked in one IOCCC contest may no longer be liked/allowed in
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# later IOCCC years.
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#
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# Corrections on winning author and fixing typos in remarks are VERY WELCOME.
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#
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# GitHub pull requests are welcome:
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#
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# If you have a patch that might make running an entry work in modern Unix-like
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# environments, please create a GitHub pull request for the IOCCC judges to
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# consider.
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#
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# Suggestions and corrections regarding Makefiles, winning author information,
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# fixing typos in remarks, and code patches are welcome via opening a GitHub
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# issue or better yet, by creating a GitHub pull request for the IOCCC judges
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# to consider. To form a GitHub issue or GitHub pull, please visit:
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#
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# https://github.com/ioccc-src/winner
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#
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################################################################################
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# This work by Landon Curt Noll and Leonid A. Broukhis is licensed under:
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#
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# Creative Commons Attribution-ShareAlike 3.0 Unported License.
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#
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# See: http://creativecommons.org/licenses/by-sa/3.0/
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# tool locations
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#############################
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# shell used by this Makefile
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#############################
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#
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SHELL= /bin/sh
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CP= cp
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CPP= cpp
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GUNZIP= gunzip
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LD= ld
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MAKE= make
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RM= rm
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SED= sed
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TAR= tar
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TRUE= true
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SHELL= bash
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# Special flags for the gavin entry
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#######################
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# common tool locations
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#######################
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#
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# FYI: Older versions of GCC have a bug in -O2 optimization, hence -O1
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#
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GAVIN_OPT= -O1
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GAVIN_FLAGS=\
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'-DY(m)=*((int*)(m))'\
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'-DE(f,a,b,c)=((G((*)))(f))(a,b,c)'\
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'-DM=for(D=0;D<786432;D++)'\
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'-DZ=int i=0,j=0,h,n,p=393728,s=26739,C,D'\
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'-DV=0x90200'\
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'-DK=0'\
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'-DR=while((C=E(V-8,100,0,0))&3&&(D=E(V-8,96,0,0))|3){'\
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'-DL(c,d)=E(V+8,100,c,0);R}E(V+8,96,d,0);R}'
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include ../../var.mk
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# Set X11_LIBDIR to the directory where the X11 library resides
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#
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X11_LIBDIR= /usr/X11R6/lib
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#X11_LIBDIR= /usr/X11R6/lib
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#X11_LIBDIR= /usr/X11/lib
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X11_LIBDIR= /opt/X11/lib
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#CINCLUDE= -I ${HOMEBREW_PREFIX}/include/SDL2
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# Set X11_INCLUDEDIR to the directory where the X11 include files reside
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#
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#X11_INCDIR= /usr/X11R6/include
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#X11_INCDIR= /usr/X11/include
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X11_INCDIR= /opt/X11/include
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# optimization
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# Common C compiler warnings to silence
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#
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#CSILENCE=
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CSILENCE= -Wno-bitwise-conditional-parentheses -Wno-bitwise-op-parentheses \
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-Wno-constant-conversion -Wno-error -Wno-implicit-function-declaration \
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-Wno-int-to-pointer-cast -Wno-parentheses -Wno-pointer-to-int-cast \
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-Wno-return-type -Wno-unused-parameter -Wno-unused-variable
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||||
|
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# Common C compiler warning flags
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||||
#
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#CWARN= ${CSILENCE}
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#CWARN= -Wall ${CSILENCE}
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#CWARN= -Wall -Wextra ${CSILENCE}
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CWARN= -Wall -Wextra -pedantic ${CSILENCE}
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||||
|
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# Compiler standard
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#
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#CSTD=
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#CSTD= -ansi
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CSTD= -std=gnu99
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# Compiler bit architecture
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||||
#
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||||
# Some entries require 32-bitness:
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# ARCH= -m32
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#
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# Some entries require 64-bitness:
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# ARCH= -m64
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#
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# By default we assume nothing:
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#
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ARCH=
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# Defines that are needed to compile
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#
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#CDEFINE=
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CDEFINE= '-DY(m)=*((int*)(m))' \
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'-DE(f,a,b,c)=((G((*)))(f))(a,b,c)' \
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'-DM=for(D=0;D<786432;D++)' \
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'-DZ=int i=0,j=0,h,n,p=393728,s=26739,C,D' \
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'-DV=0x90200' \
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'-DK=0' \
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'-DR=while((C=E(V-8,100,0,0))&3&&(D=E(V-8,96,0,0))|3){' \
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'-DL(c,d)=E(V+8,100,c,0);R}E(V+8,96,d,0);R}'
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# Include files that are needed to compile
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#
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CINCLUDE=
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#CINCLUDE= -include stdlib.h
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#CINCLUDE= -include stdio.h
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#CINCLUDE= -include stdlib.h -include stdio.h
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#CINCLUDE= -I ${X11_INCDIR} -I ${X11_INCDIR}/X11
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#CINCLUDE= `${SDL2_CONFIG} --cflags`
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# Optimization
|
||||
#
|
||||
# Most compiles will safely use -O2. Some can use only -O1 or -O.
|
||||
# A few compilers have broken optimizers and thus you may
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# not want anything.
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# A few compilers have broken optimizers or this entry make break
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# under those buggy optimizers and thus you may not want anything.
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# Reasonable compilers will allow for -O3.
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#
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#OPT=
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#OPT= -O
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#OPT= -O1
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OPT= -O2
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OPT= -O1
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||||
#OPT= -O2
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||||
#OPT= -O3
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||||
|
||||
# Default flags for ANSI C compilation
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#
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CFLAGS= ${CSTD} ${CWARN} ${ARCH} ${CDEFINE} ${CINCLUDE} ${OPT}
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# flags for ANSI compiles
|
||||
# Libraries needed to build
|
||||
#
|
||||
# NOTE: Some ANSI compilers make use of -Xa to turn on ANSI mode,
|
||||
# others such as gcc may want -ansi, others (Compaq Tru64 Unix)
|
||||
# want -std1, and others may want nothing at all.
|
||||
# Adjust the CFLAGS line as needed.
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||||
#
|
||||
# NOTE: Some compilers cannot optimize, or optimize some entries
|
||||
# incorrectly. You might want to turn on -O to see if your
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||||
# compiler can handle them.
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||||
#
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||||
#
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#CFLAGS= -Xa ${OPT}
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#CFLAGS= -std1 $(OPT)
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CFLAGS= -ansi ${OPT}
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LIBS=
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#LIBS= -lm
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#LIBS= -L ${X11_LIBDIR} -lX11
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#LIBS= `${SDL2_CONFIG} --libs`
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# ANSI compiler
|
||||
#
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||||
# Set CC to the name of your ANSI compiler.
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||||
#
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||||
# Some entries seem to need gcc. If you have gcc, set
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||||
# both CC and MAY_NEED_GCC to gcc.
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||||
#
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||||
# If you do not have gcc, set CC to the name of your ANSI compiler, and
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# set MAY_NEED_GCC to either ${CC} (and hope for the best) or to just :
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# to disable such programs.
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# C compiler to use
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#
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CC= cc
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MAY_NEED_GCC= gcc
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#CC=clang
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#CC=gcc
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# 2004 winners
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||||
# Compiler add-ons or replacements for clang only
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#
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WINNERS= anonymous arachnid burley gavare gavin hibachi hoyle jdalbec \
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kopczynski newbern omoikane schnitzi sds vik1 vik2
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CLEAN= anonymous_clean arachnid_clean burley_clean gavare_clean gavin_clean \
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hibachi_clean hoyle_clean jdalbec_clean kopczynski_clean \
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newbern_clean omoikane_clean schnitzi_clean sds_clean vik1_clean \
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vik2_clean
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CLOBBER= anonymous_clobber arachnid_clobber burley_clobber gavare_clobber \
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gavin_clobber hibachi_clobber hoyle_clobber jdalbec_clobber \
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kopczynski_clobber newbern_clobber omoikane_clobber schnitzi_clobber \
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sds_clobber vik1_clobber vik2_clobber
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ALT_NAMES= hoyle.orig kopczynski.orig
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DATA_FILES= arachnid_files gavin_files hibachi_files kopczynski_files \
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newbern_files omoikane_files schnitzi_files
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# default build
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ifeq ($(CC),clang)
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#
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all: ${WINNERS}
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||||
# Best use of "Precious" Lines
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CSILENCE+= -Wno-comma -Wno-implicit-int-conversion -Wno-missing-prototypes \
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-Wno-poison-system-directories
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#
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anonymous: anonymous.c
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${CC} anonymous.c -o anonymous
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anonymous_clean:
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${RM} -f anonymous.o
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anonymous_clobber: anonymous_clean
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${RM} -f anonymous
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# Best use of Vision
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CWARN+= -Weverything
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#
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||||
arachnid: arachnid.c
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${CC} -o arachnid -DL=LINES -DS=COLS \
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-DW=mvwaddch\(w,v,u,acs_map\[l\[m\[u arachnid.c -lncurses
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endif
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||||
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||||
arachnid_clean:
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${RM} -f arachnid.o
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arachnid_clobber: arachnid_clean
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||||
${RM} -f arachnid
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||||
arachnid_files: arachnid.info
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||||
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||||
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||||
# Best Calculated Risk
|
||||
# Specific add-ons or replacements for gcc only
|
||||
#
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burley: burley.c
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${CC} -ansi burley.c -o burley
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burley_clean:
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${RM} -f burley.o
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||||
burley_clobber: burley_clean
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${RM} -f burley
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||||
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# Best Use of Light and Spheres
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ifeq ($(CC),gcc)
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#
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gavare: gavare.c
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${CC} -O3 gavare.c -o gavare
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gavare_clean:
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${RM} -f gavare.o
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||||
gavare_clobber: gavare_clean
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${RM} -f gavare
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||||
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||||
# Best of Show
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#CSILENCE+=
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#
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gavin: gavin.c
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${CC} ${GAVIN_OPT} -o gavin ${GAVIN_FLAGS} gavin.c
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${RM} -f kernel
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./gavin > kernel
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${CC} ${GAVIN_OPT} -c ${GAVIN_FLAGS} -DB=_start '-Dputchar(a)=' gavin.c
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${RM} -f sh
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||||
${LD} -s -o sh gavin.o
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${RM} -f vi
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${CP} sh vi
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${RM} -f fs.tar
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${TAR} -cvf fs.tar sh vi gavin.c gavin.hint prim
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||||
gavin_clean:
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||||
${RM} -f sh vi kernel gavin.o
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gavin_clobber: gavin_clean
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||||
${RM} -f gavin fs.tar
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||||
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||||
gavin_files: boot.b lilo.conf prim gavin_install.txt
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||||
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||||
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||||
# Best Abuse of the Guidelines
|
||||
#CWARN+=
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||||
#
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||||
hibachi: hibachi.tar.gz
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||||
${RM} -f hibachi.tar
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||||
${GUNZIP} < hibachi.tar.gz > hibachi.tar
|
||||
${TAR} -xvf hibachi.tar
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||||
${RM} -f hibachi.tar
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||||
(cd hibachi && ${SHELL} ./configure)
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([ -f hibachi/makefile ] && cd hibachi && $(MAKE) -f makefile || true)
|
||||
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||||
hibachi_clean:
|
||||
${RM} -f hibachi/hibachi.o hibachi.tar
|
||||
|
||||
hibachi_clobber: hibachi_clean
|
||||
${RM} -rf hibachi
|
||||
|
||||
hibachi_files: hibachi.tar.gz
|
||||
endif
|
||||
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||||
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||||
# Most Functional Output
|
||||
##############################
|
||||
# Special flags for this entry
|
||||
##############################
|
||||
#
|
||||
hoyle: hoyle.c
|
||||
${CC} hoyle.c -o hoyle -lm
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||||
|
||||
hoyle.orig: hoyle.orig.c
|
||||
${CC} hoyle.orig.c -o hoyle.orig -lm
|
||||
|
||||
hoyle_clean:
|
||||
${RM} -f hoyle.o hoyle.orig.o
|
||||
|
||||
hoyle_clobber: hoyle_clean
|
||||
${RM} -f hoyle hoyle.orig
|
||||
|
||||
|
||||
# Best Abuse of the Periodic Table
|
||||
ENTRY= gavin
|
||||
PROG= ${ENTRY}
|
||||
#
|
||||
jdalbec: jdalbec.c
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||||
@${RM} -f jdalbec2.c
|
||||
-${CC} -E jdalbec.c > jdalbec2.c
|
||||
@${RM} -f jdalbec3.c
|
||||
${SED} -e 's/ (/(/g' < jdalbec2.c > jdalbec3.c
|
||||
${CC} -ansi jdalbec3.c -o jdalbec
|
||||
|
||||
jdalbec_clean:
|
||||
${RM} -f jdalbec2.c jdalbec3.c jdalbec.o
|
||||
|
||||
jdalbec_clobber: jdalbec_clean
|
||||
${RM} -f jdalbec
|
||||
|
||||
|
||||
# Best one-liner
|
||||
OBJ= ${PROG}.o
|
||||
DATA= boot.b lilo.conf prim gavin_install.txt
|
||||
TARGET= ${PROG} kernel sh vi fs.tar
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||||
#
|
||||
kopczynski: kopczynski.c
|
||||
${CC} -Dif=while kopczynski.c -o kopczynski
|
||||
|
||||
kopczynski.orig: kopczynski.orig.c
|
||||
${CC} -Dif=while kopczynski.orig.c -o kopczynski.orig
|
||||
|
||||
kopczynski_clean:
|
||||
${RM} -f kopczynski.o kopczynski.orig.o
|
||||
|
||||
kopczynski_clobber: kopczynski_clean
|
||||
${RM} -f kopczynski kopczynski.orig
|
||||
|
||||
kopczynski_files: kopczynski-10 kopczynski-11 kopczynski-8a kopczynski-8b \
|
||||
kopczynski-8c kopczynski-9
|
||||
ALT_OBJ=
|
||||
ALT_TARGET=
|
||||
|
||||
|
||||
# Best Font Engine
|
||||
#################
|
||||
# build the entry
|
||||
#################
|
||||
#
|
||||
newbern: newbern.c
|
||||
${CC} newbern.c -o newbern
|
||||
all: data ${TARGET}
|
||||
@${TRUE}
|
||||
|
||||
newbern_clean:
|
||||
${RM} -f newbern.o
|
||||
.PHONY: all alt data everything clean clobber install \
|
||||
love haste waste maker easter_egg sandwich \
|
||||
supernova deep_magic magic charon pluto
|
||||
|
||||
newbern_clobber: newbern_clean
|
||||
${RM} -f newbern
|
||||
${PROG}: ${PROG}.c
|
||||
${CC} ${CFLAGS} $< -o $@ ${LIBS}
|
||||
|
||||
newbern_files: newbern.dat
|
||||
kernel: ${PROG}
|
||||
${RM} -f $@
|
||||
./${PROG} > $@
|
||||
|
||||
sh: ${PROG}.c
|
||||
${RM} -f ${PROG}.o
|
||||
${CC} ${CFLAGS} -DB=_start '-Dputchar(a)=' $< -c
|
||||
${RM} -f $@
|
||||
${LD} -static -o $@ ${PROG}.o
|
||||
|
||||
# Best Utility
|
||||
vi: sh
|
||||
${RM} -f $@
|
||||
${CP} $< $@
|
||||
|
||||
fs.tar: sh vi gavin.c README.md prim
|
||||
${RM} -f $@
|
||||
${TAR} -cvf $@ sh vi gavin.c README.md prim
|
||||
|
||||
# alternative executable
|
||||
#
|
||||
omoikane: omoikane.c
|
||||
${CC} -O omoikane.c -o omoikane
|
||||
alt: data ${ALT_TARGET}
|
||||
@${TRUE}
|
||||
|
||||
omoikane_clean:
|
||||
${RM} -f omoikane.o
|
||||
|
||||
omoikane_clobber: omoikane_clean
|
||||
${RM} -f omoikane
|
||||
|
||||
omoikane_files: omoikane.info
|
||||
|
||||
|
||||
# Best Non-Use of Curses
|
||||
# data files
|
||||
#
|
||||
schnitzi: schnitzi.c
|
||||
${CC} schnitzi.c -o schnitzi
|
||||
data: ${DATA}
|
||||
@${TRUE}
|
||||
|
||||
schnitzi_clean:
|
||||
${RM} -f schnitzi.o
|
||||
|
||||
schnitzi_clobber: schnitzi_clean
|
||||
${RM} -f schnitzi
|
||||
|
||||
schnitzi_files: schnitzi.inp0 schnitzi.inp1
|
||||
|
||||
|
||||
# Best Abuse of Indentation
|
||||
# both all and alt
|
||||
#
|
||||
sds: sds.c
|
||||
${CC} -o sds sds.c
|
||||
|
||||
sds_clean:
|
||||
${RM} -f sds_encoder.c sds_encoder.o sds.o
|
||||
|
||||
sds_clobber: sds_clean
|
||||
${RM} -f sds sds_encoder
|
||||
|
||||
|
||||
# Best X11 Game
|
||||
#
|
||||
vik1: vik1.c
|
||||
${CC} -ansi -O2 -o vik1 vik1.c -L${X11_LIBDIR} -lX11
|
||||
|
||||
vik1_clean:
|
||||
${RM} -f vik1.o
|
||||
|
||||
vik1_clobber: vik1_clean
|
||||
${RM} -f vik1
|
||||
|
||||
|
||||
# Best Abuse of CPP
|
||||
#
|
||||
vik2: vik2.c
|
||||
@${RM} -f vik2_1.c
|
||||
${CC} -E '-DSTOP=_5' '-DFNAME="vik2_1.c"' vik2.c > vik2_1.c
|
||||
@${RM} -f vik2_2.c
|
||||
${CC} -E vik2_1.c > vik2_2.c
|
||||
${CC} -O vik2_2.c -o vik2
|
||||
|
||||
vik2_clean:
|
||||
${RM} -f vik2_1.c vik2_2.c vik2.o
|
||||
|
||||
vik2_clobber: vik2_clean
|
||||
${RM} -f vik2
|
||||
everything: all alt
|
||||
|
||||
|
||||
###############
|
||||
# utility rules
|
||||
###############
|
||||
#
|
||||
everything: ${WINNERS} ${ALT_NAMES} ${DATA_FILES}
|
||||
clean:
|
||||
${RM} -f ${OBJ} ${ALT_OBJ}
|
||||
${RM} -f sh vi kernel gavin.o
|
||||
@-if [ -f indent.c ]; then \
|
||||
echo ${RM} -f indent.c; \
|
||||
${RM} -f indent.c; \
|
||||
fi
|
||||
|
||||
clobber: clean
|
||||
${RM} -f ${TARGET} ${ALT_TARGET}
|
||||
${RM} -f gavin fs.tar
|
||||
@-if [ -e sandwich ]; then \
|
||||
${RM} -f sandwich; \
|
||||
echo 'ate sandwich'; \
|
||||
fi
|
||||
|
||||
install:
|
||||
@echo "Dr. Spock says that is not logical!"
|
||||
@${TRUE}
|
||||
|
||||
# you may be able to misunderstand the source by reading indent.c
|
||||
#
|
||||
indent.c: ${PROG}.c
|
||||
@if which "${GINDENT}" >/dev/null 2>&1; then \
|
||||
echo ${RM} -f $@; \
|
||||
${RM} -f $@; \
|
||||
echo "${GINDENT} < $< > $@"; \
|
||||
${GINDENT} < $< > $@; \
|
||||
elif which "${INDENT}" >/dev/null 2>&1; then \
|
||||
echo ${RM} -f $@; \
|
||||
${RM} -f $@; \
|
||||
echo "${INDENT} < $< > $@"; \
|
||||
${INDENT} < $< > $@; \
|
||||
else \
|
||||
echo "no intent tool found, ident $< yourself, sorry"; \
|
||||
echo "exit 1"; \
|
||||
exit 1; \
|
||||
fi
|
||||
|
||||
|
||||
##################
|
||||
# 133t hacker rulz
|
||||
##################
|
||||
#
|
||||
love:
|
||||
@echo 'not war?'
|
||||
@${TRUE}
|
||||
|
||||
haste:
|
||||
$(MAKE) waste
|
||||
|
||||
waste:
|
||||
@echo 'waste'
|
||||
|
||||
clean: ${CLEAN}
|
||||
${RM} -f a.out core
|
||||
|
||||
clobber: ${CLOBBER}
|
||||
${RM} -f ${WINNERS}
|
||||
${RM} -f ${ALT_NAMES}
|
||||
|
||||
nuke: clobber
|
||||
@${TRUE}
|
||||
|
||||
install: all
|
||||
${CAT} ${WINNERS} ${ALT_NAMES} > /dev/null
|
||||
waste:
|
||||
@echo 'haste'
|
||||
@${TRUE}
|
||||
|
||||
maker:
|
||||
@echo 'Participate in a maker faire'
|
||||
@${TRUE}
|
||||
|
||||
easter_egg:
|
||||
@echo "you expected to often misunderstand this $${RANDOM} magic"
|
||||
@echo "chongo '<was here>' /\\oo/\\"
|
||||
@echo "Eggy"
|
||||
|
||||
sandwich: easter_egg
|
||||
@if [ `id -u` -eq 0 ]; then \
|
||||
echo 'Okay.'; \
|
||||
echo "$${RANDOM}`date +%s`$${RANDOM}" > $@; \
|
||||
else \
|
||||
echo 'What? Make it yourself.'; \
|
||||
exit 1; \
|
||||
fi
|
||||
|
||||
# Understand the history of the Homebrew Computer Club
|
||||
# as well as the West Coast Computer Faire and
|
||||
# you might be confused different. :-)
|
||||
#
|
||||
supernova: sandwich
|
||||
@-if [ -r .code_anal ]; then \
|
||||
${RM} -f .code_anal_v6; \
|
||||
else \
|
||||
echo "planet deniers, like some members of the IAU, are so cute when they try to defend their logic"; \
|
||||
fi
|
||||
@echo "A $@ helps ${MAKE} the elements that help form planets"
|
||||
@${TRUE}
|
||||
|
||||
deep_magic: supernova
|
||||
@-if [ -r .code_anal ]; then \
|
||||
ccode_analysis --deep_magic 7889066cdbdf09b0408021754586e895be641cc9be29e7eafd3ca65359541f17 \
|
||||
--FNV1a_hash_512_bit -v2 "${PROG}" "${PROG}.c"; \
|
||||
else \
|
||||
echo "Wrong! Do it again!"; \
|
||||
sleep 2; \
|
||||
echo "Wrong! Do it again!"; \
|
||||
sleep 2; \
|
||||
echo "Wrong! Do it again!"; \
|
||||
fi
|
||||
@${TRUE}
|
||||
|
||||
magic: deep_magic
|
||||
@-if [ -r .code_anal ]; then \
|
||||
ccode_analysis --level 20003 --mode 5717175 --FNV1a_hash_512_bit -v2 "${PROG}" "${PROG}.c"; \
|
||||
else \
|
||||
echo "If you don't eat yer meat, you can't have any pudding!"; \
|
||||
echo "How can you have any pudding if you don't eat yer meat?!"; \
|
||||
fi
|
||||
@${TRUE}
|
||||
|
||||
# The IOCCC resident astronomer states
|
||||
#
|
||||
charon: magic
|
||||
@echo "$@ is a dwarf planet"
|
||||
@echo "dwarf is a type of planet"
|
||||
@echo "therefore IAU, $@ is a planet"
|
||||
|
||||
pluto: charon
|
||||
${MAKE} charon
|
||||
@echo "$@ is a dwarf planet"
|
||||
@echo "dwarf is a type of planet"
|
||||
@echo "therefore, $@ is a planet"
|
||||
@echo "having lots of planets is good feature because supernovae can help ${MAKE} a lot of them"
|
||||
+131
-108
@@ -1,4 +1,4 @@
|
||||
Best of Show:
|
||||
# Best of Show:
|
||||
|
||||
Gavin Barraclough
|
||||
Flat 20, 83 Newton Street,
|
||||
@@ -7,134 +7,157 @@ Best of Show:
|
||||
U.K.
|
||||
|
||||
|
||||
Judges' Comments:
|
||||
# To build:
|
||||
|
||||
To build and run (on any platform, without root privileges):
|
||||
```sh
|
||||
make
|
||||
```
|
||||
|
||||
make gavin
|
||||
### To run:
|
||||
|
||||
To enjoy the results (on a Linux/x86 machine):
|
||||
```sh
|
||||
./prog
|
||||
```
|
||||
|
||||
su
|
||||
### Try:
|
||||
|
||||
# Make a floppy with an ext2 filesystem (mke2fs /dev/fd0),
|
||||
# mount it under /mnt/floppy
|
||||
To enjoy the results (on a Linux/x86 machine):
|
||||
|
||||
cp kernel fs.tar lilo.conf boot.b /mnt/floppy
|
||||
```sh
|
||||
su
|
||||
```
|
||||
|
||||
# If the version of your lilo is not 21.4, use the appropriate boot.b
|
||||
# If your floppy drive is not /dev/fd0, edit lilo.conf appropriately
|
||||
|
||||
lilo -C /mnt/floppy/lilo.conf
|
||||
|
||||
# Boot from the floppy on an x86 machine with a PS/2 keyboard and mouse
|
||||
# Move the window away from the corner
|
||||
|
||||
vi gavin.c
|
||||
|
||||
# Scroll the file with up-arrow and down-arrow
|
||||
|
||||
sh
|
||||
|
||||
# Can have several shell windows
|
||||
|
||||
vi gavin.hint
|
||||
prim
|
||||
|
||||
# Press and hold any key
|
||||
|
||||
Over the years, we've seen a program that dumps core
|
||||
if executed on a "wrong" architecture immediately (1984/mullender),
|
||||
or after a while (2001/bellard). This entry will happily compile and
|
||||
execute on any architecture - the trick is that the result, to be useful,
|
||||
must be produced (and can only be enjoyed) on a particular architecture.
|
||||
We have not decided yet whether to disallow this for future contests.
|
||||
|
||||
If you do not want to mess with a floppy and you use GRUB, see below
|
||||
in the author's notes.
|
||||
You can put additional text files in fs.tar for browsing with vi.
|
||||
If you do not want to bother rebooting your computer at all,
|
||||
see http://bellard.org/ for QEMU (Fabrice Bellard is an IOCCC 2001 winner),
|
||||
but your experience will be limited (replace -DK=0 with -DK=1 in the Makefile,
|
||||
and you will have to move the mouse to trigger the initial screen update).
|
||||
|
||||
The judges were able to write a few more programs to run on this OS
|
||||
What are the limitations for such programs?
|
||||
What you can do and what you cannot do in such programs?
|
||||
|
||||
The program called "prim", written by the judges,
|
||||
computes and prints prime numbers.
|
||||
Make a floppy with an ext2 filesystem (mke2fs /dev/fd0), mount it under /mnt/floppy.
|
||||
Then:
|
||||
|
||||
|
||||
Selected Author's Comments:
|
||||
```sh
|
||||
cp kernel fs.tar lilo.conf boot.b /mnt/floppy
|
||||
```
|
||||
|
||||
This is a 32-bit multitasking operating system for x86 computers,
|
||||
with GUI and filesystem, support for loading and executing user
|
||||
applications in elf binary format, with ps2 mouse and keyboard drivers,
|
||||
and vesa graphics. And a command shell. And an application -
|
||||
a simple text-file viewer.
|
||||
NOTE: If the version of your lilo is not 21.4, use the appropriate boot.b file.
|
||||
|
||||
The OS has ended up as a traditional monolith with one entry point
|
||||
for syscalls, with apps treated as cooperative-multitasking tasks
|
||||
that can be sent different messages (e.g. 'initialize', 'key hit',
|
||||
'render to buffer') through their main entry point, and which will
|
||||
return control to the OS having performed the necessary work.
|
||||
Applications are are passed a pointer to their task structure,
|
||||
which is partially defined by the OS, and partially for
|
||||
the application's own use.
|
||||
NOTE: If your floppy drive is not /dev/fd0, edit lilo.conf appropriately.
|
||||
|
||||
The program compiles into a tool to build a kernel image,
|
||||
so having built the program, the makefile will run it,
|
||||
piping the output into a file called 'kernel'.
|
||||
The makefile will then proceed to build a root filesystem image.
|
||||
This involves rebuilding the program with different compiler flags,
|
||||
then building a tar file containing the resulting programs
|
||||
(the filesystem format supported by the OS is the tar-file format).
|
||||
```sh
|
||||
lilo -C /mnt/floppy/lilo.conf
|
||||
```
|
||||
|
||||
For further usage information see 'gavin_install.txt'.
|
||||
Boot from the floppy on an x86 machine with a PS/2 keyboard and mouse.
|
||||
Move the window away from the corner.
|
||||
|
||||
The filenames 'vi' and 'sh' are significant, and should not be changed.
|
||||
```sh
|
||||
vi gavin.c
|
||||
```
|
||||
|
||||
Known 'features'.
|
||||
Scroll the file with up-arrow and down-arrow
|
||||
|
||||
Known issues are really too plentiful to list.
|
||||
```sh
|
||||
sh
|
||||
```
|
||||
|
||||
If the mouse pointer goes off the left hand side of the screen
|
||||
it will reappear on the right, and vice-versa.
|
||||
If it goes off the top or bottom, it will go and corrupt some memory.
|
||||
Can have several shell windows:
|
||||
|
||||
The file system is kinda optimistic about matching names, so,
|
||||
for example if you type the command 'shell' into a command-line
|
||||
it will execute the program 'sh' - close enough a match for it.
|
||||
```sh
|
||||
vi gavin.hint
|
||||
./prim
|
||||
```
|
||||
|
||||
The elf binaries are not loaded at the correct address,
|
||||
and their entry point must be the start address of the text segment.
|
||||
Press and hold any key.
|
||||
|
||||
The keyboard driver can cope with the basic alpha-numeric keys,
|
||||
but gets confused by fancy things like 'shift' or 'backspace'.
|
||||
## Judges' comments:
|
||||
|
||||
In the text-file viewer, 'vi', the up/down and pgup/pgdn keys
|
||||
scroll up or down by one line. There is nothing to stop you
|
||||
[from] scrolling above the top of the file, and pressing any
|
||||
other keys may have an undefined effect.
|
||||
Over the years, we've seen a program that dumps core
|
||||
if executed on a "wrong" architecture immediately (1984/mullender),
|
||||
or after a while (2001/bellard). This entry will happily compile and
|
||||
execute on any architecture - the trick is that the result, to be useful,
|
||||
must be produced (and can only be enjoyed) on a particular architecture.
|
||||
We have not decided yet whether to disallow this for future contests.
|
||||
|
||||
The x86 is bootstrapped into 32bit mode in 6 instructions,
|
||||
with 4 more to set up data/stack segments and a stack-pointer
|
||||
to allow C code to be run. On top of this there are also about
|
||||
a dozen instructions to switch the video card into graphics mode.
|
||||
All in all, a relatively tiny number of instructions next to
|
||||
the size of the C program. Also, the string is mostly composed
|
||||
of data - a Linux-esque kernel header for the bootloader,
|
||||
protected mode descriptor tables, keyboard maps, etc.
|
||||
(I should also mention that it contains mini functions
|
||||
to perform an x86 'in' and 'out' instruction - to allow
|
||||
the keyboard & mouse to be driven from C code).
|
||||
If you do not want to mess with a floppy and you use GRUB, see below
|
||||
in the author's notes.
|
||||
You can put additional text files in fs.tar for browsing with vi.
|
||||
If you do not want to bother rebooting your computer at all,
|
||||
see http://bellard.org/ for QEMU (Fabrice Bellard is an IOCCC 2001 winner),
|
||||
but your experience will be limited (replace -DK=0 with -DK=1 in the Makefile,
|
||||
and you will have to move the mouse to trigger the initial screen update).
|
||||
|
||||
Porting to another architecture should be relatively easy* -
|
||||
the string simply needs be replaced with one containing
|
||||
data & code suitable for the new target platform.
|
||||
Accesses to data in the string are made relative to the define 'V',
|
||||
so these may need updating as appropriate (0x90200 is the address
|
||||
at which a Linux bootloader loads an x86 kernel image).
|
||||
The judges were able to write a few more programs to run on this OS
|
||||
What are the limitations for such programs?
|
||||
What you can do and what you cannot do in such programs?
|
||||
|
||||
* ;-)
|
||||
The program called "prim", written by the judges,
|
||||
computes and prints prime numbers.
|
||||
|
||||
## Author's comments:
|
||||
|
||||
This is a 32-bit multitasking operating system for x86 computers,
|
||||
with GUI and filesystem, support for loading and executing user
|
||||
applications in elf binary format, with ps2 mouse and keyboard drivers,
|
||||
and vesa graphics. And a command shell. And an application -
|
||||
a simple text-file viewer.
|
||||
|
||||
The OS has ended up as a traditional monolith with one entry point
|
||||
for syscalls, with apps treated as cooperative-multitasking tasks
|
||||
that can be sent different messages (e.g. 'initialize', 'key hit',
|
||||
'render to buffer') through their main entry point, and which will
|
||||
return control to the OS having performed the necessary work.
|
||||
Applications are are passed a pointer to their task structure,
|
||||
which is partially defined by the OS, and partially for
|
||||
the application's own use.
|
||||
|
||||
The program compiles into a tool to build a kernel image,
|
||||
so having built the program, the makefile will run it,
|
||||
piping the output into a file called 'kernel'.
|
||||
The makefile will then proceed to build a root filesystem image.
|
||||
This involves rebuilding the program with different compiler flags,
|
||||
then building a tar file containing the resulting programs
|
||||
(the filesystem format supported by the OS is the tar-file format).
|
||||
|
||||
For further usage information see 'gavin_install.txt'.
|
||||
|
||||
The filenames 'vi' and 'sh' are significant, and should not be changed.
|
||||
|
||||
### Known 'features'
|
||||
|
||||
Known issues are really too plentiful to list.
|
||||
|
||||
If the mouse pointer goes off the left hand side of the screen
|
||||
it will reappear on the right, and vice-versa.
|
||||
If it goes off the top or bottom, it will go and corrupt some memory.
|
||||
|
||||
The file system is kinda optimistic about matching names, so,
|
||||
for example if you type the command 'shell' into a command-line
|
||||
it will execute the program 'sh' - close enough a match for it.
|
||||
|
||||
The elf binaries are not loaded at the correct address,
|
||||
and their entry point must be the start address of the text segment.
|
||||
|
||||
The keyboard driver can cope with the basic alpha-numeric keys,
|
||||
but gets confused by fancy things like 'shift' or 'backspace'.
|
||||
|
||||
In the text-file viewer, 'vi', the up/down and pgup/pgdn keys
|
||||
scroll up or down by one line. There is nothing to stop you
|
||||
[from] scrolling above the top of the file, and pressing any
|
||||
other keys may have an undefined effect.
|
||||
|
||||
The x86 is bootstrapped into 32bit mode in 6 instructions,
|
||||
with 4 more to set up data/stack segments and a stack-pointer
|
||||
to allow C code to be run. On top of this there are also about
|
||||
a dozen instructions to switch the video card into graphics mode.
|
||||
All in all, a relatively tiny number of instructions next to
|
||||
the size of the C program. Also, the string is mostly composed
|
||||
of data - a Linux-esque kernel header for the bootloader,
|
||||
protected mode descriptor tables, keyboard maps, etc.
|
||||
(I should also mention that it contains mini functions
|
||||
to perform an x86 'in' and 'out' instruction - to allow
|
||||
the keyboard & mouse to be driven from C code).
|
||||
|
||||
Porting to another architecture should be relatively easy* -
|
||||
the string simply needs be replaced with one containing
|
||||
data & code suitable for the new target platform.
|
||||
Accesses to data in the string are made relative to the define 'V',
|
||||
so these may need updating as appropriate (0x90200 is the address
|
||||
at which a Linux bootloader loads an x86 kernel image).
|
||||
|
||||
* ;-)
|
||||
+3
-2
@@ -1,8 +1,9 @@
|
||||
int main(int t, char **q, char **d) { return cain(t, (int)q, (int)d); }
|
||||
#define G(n) int n(int t, int q, int d)
|
||||
#define X(p,t,s) (p>=t&&p<(t+s)&&(p-(t)&1023)<(s&1023))
|
||||
#define U(m) *((signed char *)(m))
|
||||
#define F if(!--q){
|
||||
#define I(s) (int)main-(int)s
|
||||
#define I(s) (int)cain-(int)s
|
||||
#define P(s,c,k) for(h=0; h>>14==0; h+=129)Y(16*c+h/1024+Y(V+36))&128>>(h&7)?U(s+(h&15367))=k:k
|
||||
|
||||
G (B)
|
||||
@@ -52,7 +53,7 @@ else
|
||||
|
||||
G (_);
|
||||
G (o);
|
||||
G (main)
|
||||
G (cain)
|
||||
{
|
||||
Z, k = K;
|
||||
if (!t)
|
||||
|
||||
@@ -208,4 +208,100 @@ actually gcc if it looks like it's gcc (two different binaries).
|
||||
|
||||
## Entries that can compile but crash (sometimes or always)
|
||||
|
||||
.. entries to be added later ..
|
||||
### [2004/gavin](2004/gavin/gavin.c) ([README.md](2004/gavin//README.md))
|
||||
|
||||
Segmentation fault occurs when running `gavin` to produce the kernel:
|
||||
|
||||
```sh
|
||||
./gavin > kernel
|
||||
```
|
||||
|
||||
When trying to link `gavin.o` to produce `sh`, the linker generates:
|
||||
|
||||
```
|
||||
Undefined symbols for architecture arm64:
|
||||
"start", referenced from:
|
||||
-u command line option
|
||||
(maybe you meant: __start)
|
||||
ld: symbol(s) not found for architecture arm64
|
||||
```
|
||||
|
||||
#### Recent for 2004/gavin mods:
|
||||
|
||||
In case recent modification are part of the problem, here is a full disclosure
|
||||
of what was changed:
|
||||
|
||||
To compile on modern C compilers, the following patch was applied to `gavin.c`:
|
||||
|
||||
```patch
|
||||
diff --git a/2004/gavin/gavin.c b/2004/gavin/gavin.c
|
||||
index c967b7e..2082b49 100644
|
||||
--- a/2004/gavin/gavin.c
|
||||
+++ b/2004/gavin/gavin.c
|
||||
@@ -1,8 +1,9 @@
|
||||
+int main(int t, char **q, char **d) { return cain(t, (int)q, (int)d); }
|
||||
#define G(n) int n(int t, int q, int d)
|
||||
#define X(p,t,s) (p>=t&&p<(t+s)&&(p-(t)&1023)<(s&1023))
|
||||
#define U(m) *((signed char *)(m))
|
||||
#define F if(!--q){
|
||||
-#define I(s) (int)main-(int)s
|
||||
+#define I(s) (int)cain-(int)s
|
||||
#define P(s,c,k) for(h=0; h>>14==0; h+=129)Y(16*c+h/1024+Y(V+36))&128>>(h&7)?U(s+(h&15367))=k:k
|
||||
|
||||
G (B)
|
||||
@@ -52,7 +53,7 @@ else
|
||||
|
||||
G (_);
|
||||
G (o);
|
||||
-G (main)
|
||||
+G (cain)
|
||||
{
|
||||
Z, k = K;
|
||||
if (!t)
|
||||
``
|
||||
|
||||
The original Makefile from 2004 had the following to say about this entry:
|
||||
|
||||
```make
|
||||
# Special flags for the gavin entry
|
||||
#
|
||||
# FYI: Older versions of GCC have a bug in -O2 optimization, hence -O1
|
||||
#
|
||||
GAVIN_OPT= -O1
|
||||
GAVIN_FLAGS=\
|
||||
'-DY(m)=*((int*)(m))'\
|
||||
'-DE(f,a,b,c)=((G((*)))(f))(a,b,c)'\
|
||||
'-DM=for(D=0;D<786432;D++)'\
|
||||
'-DZ=int i=0,j=0,h,n,p=393728,s=26739,C,D'\
|
||||
'-DV=0x90200'\
|
||||
'-DK=0'\
|
||||
'-DR=while((C=E(V-8,100,0,0))&3&&(D=E(V-8,96,0,0))|3){'\
|
||||
'-DL(c,d)=E(V+8,100,c,0);R}E(V+8,96,d,0);R}'
|
||||
|
||||
# ...
|
||||
|
||||
# Best of Show
|
||||
#
|
||||
gavin: gavin.c
|
||||
${CC} ${GAVIN_OPT} -o gavin ${GAVIN_FLAGS} gavin.c
|
||||
${RM} -f kernel
|
||||
./gavin > kernel
|
||||
${CC} ${GAVIN_OPT} -c ${GAVIN_FLAGS} -DB=_start '-Dputchar(a)=' gavin.c
|
||||
${RM} -f sh
|
||||
${LD} -s -o sh gavin.o
|
||||
${RM} -f vi
|
||||
${CP} sh vi
|
||||
${RM} -f fs.tar
|
||||
${TAR} -cvf fs.tar sh vi gavin.c gavin.hint prim
|
||||
|
||||
gavin_clean:
|
||||
${RM} -f sh vi kernel gavin.o
|
||||
|
||||
gavin_clobber: gavin_clean
|
||||
${RM} -f gavin fs.tar
|
||||
|
||||
gavin_files: boot.b lilo.conf prim gavin_install.txt
|
||||
```
|
||||
|
||||
The current ([Makefile](2004/gavin/Makefile) was modified to try and
|
||||
fit into the current IOCCC build environment.
|
||||
Reference in new issue
Block a user