Note that 2001/bellard only works for i386 linux

The author stated this directly. It is noted in the bugs.md file and the README. I also included a suggested change by Yusuke Endoh. This is not necessary for compilers that support -Wl,-z,execstack but not all compilers do (though the only one I've found that has this problem is macOS which it won't work under anyway just like -m32 won't which we also now use). Added the 'more portable' version by the author. This does not compile at least under 64-bit linux (not macOS either though of course it wouldn't work in macOS as if you look at the code you see hardcoded paths for linux ld-linux.so). I note that there's a de-obfuscated version on the author's page for the entry which might give some clues. I might look at it in the future but it appears that unless someone can provide a 64-bit linux version this will be one of the entries (now far fewer with many fixes made) that simply no longer work. This thus completes for now 2001/bellard even with disappointing circumstances.
2023-04-22 09:11:15 -07:00
1 parent 82ac1237fa
commit 0d0c2c4250
@@ -1,2 +1,3 @@
 bellard
 bellard.otccex
+otccelf
@@ -38,7 +38,7 @@ include ../../var.mk

 # Common C compiler warnings to silence
 #
-CSILENCE= #-Wno-bitwise-op-parentheses -Wno-error -Wno-implicit-function-declaration \
+CSILENCE= -Wno-bitwise-op-parentheses -Wno-error -Wno-implicit-function-declaration \
 	-Wno-implicit-int -Wno-int-conversion -Wno-int-to-pointer-cast \
 	-Wno-parentheses -Wno-return-type

@@ -55,7 +55,7 @@ CSTD= -std=gnu99
 # Some entries require 32-bitness: ARCH= -m32
 # Some entries require 64-bitness: ARCH= -m64
 #
-ARCH=
+ARCH= -m32

 # Defines that are needed to compile
 #
@@ -71,7 +71,7 @@ OPT= -O3

 # Default flags for ANSI C compilation
 #
-CFLAGS= ${CSTD} ${CWARN} ${ARCH} ${CDEFINE} ${CINCLUDE} ${OPT} -rdynamic
+CFLAGS= ${CSTD} ${CWARN} ${ARCH} ${CDEFINE} ${CINCLUDE} ${OPT} -rdynamic -fno-pie

 # Libraries needed to build
 #
@@ -19,17 +19,30 @@ make
 ```

 [Cody Boone Ferguson](/winners.html#Cody_Boone_Ferguson) partially fixed this
-but he notes that this will not work without some possibly serious debugging. As
-it is it segfaults. He fixed an earlier segfault so that at least the file can
-be opened and he also changed some of the macro uses to what they expanded to
-but mostly he kept it the same.  He also fixed
-[bellard.otccex.c](bellard.otccex.c) so it does not
-segfault and seemingly works okay (it did not work at all). The author stated
-that they used [gcc
+but he notes that this will not work without (according to the author) i386
+linux or else some skill in resolving the portability issues. As it is it
+segfaults in 64-bit linux (and as expected macOS). He fixed an earlier segfault
+so that at least the file can be opened (but perhaps that will be wrong in i386
+linux?) and he also changed some of the macro used to what they evaluate to but
+mostly he kept it the same.  He also fixed [bellard.otccex.c](bellard.otccex.c)
+so it does not segfault and seemingly works okay (it did not work at all) but
+still this appears to not work in 64-bit linux. See below portability notes.
+Thank you Cody for your assistance!
+
+### Portability notes:
+
+With a tip from [Yusuke Endoh](/winners.html#Yusuke_Endoh) we rediscovered the
+author's [web page for this program](https://bellard.org/otcc/) where it is
+stated that this will only work in i386 linux.  The author also stated in the
+remarks in this document that they used that they used [gcc
 2.95.2](https://ftp.gnu.org/gnu/gcc/gcc-2.95.2/gcc-everything-2.95.2.tar.gz) but
-we don't know if that's relevant or not. Thank you Cody for your assistance! Can
-you fix the entry? We welcome your help! If you can please look at
-[bugs.md](/bugs.md) for more information. Thank you!
+we don't know if that's relevant or not.
+
+Yusuke offered a modification which is not needed with gcc but with some
+versions of `clang` it is. With `gcc` we can get away with `-rdynamic -fno-pie
+-Wl,-z,execstack` which solves the problem of execution in memory but any
+compiler that does not support this would not work. Thus we use the modification
+by Yusuke. Thank you Yusuke!


 ## Try:
@@ -40,7 +53,7 @@ you fix the entry? We welcome your help! If you can please look at

 ## Judges' remarks:

-<JUDGES_COMMENTS> :-)
+\<JUDGES_COMMENTS\> :-)

 ## Author's remarks:

@@ -1,6 +1,8 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
+#include <ctype.h>
+#include <sys/mman.h>
 #define k *(int*)
 #define a if(
 #define c ad()
@@ -8,7 +10,7 @@
 #define p while(
 #define x *(char*)
 #define b ==
-#define V =calloc(1,99999)
+#define V =mmap(NULL, 99999, PROT_EXEC | PROT_WRITE | PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0)
 #define f ()
 #define J return
 #define l ae(
@@ -0,0 +1,621 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <sys/mman.h>
+#define r *(char*)
+#define b if(
+#define t *(int*)
+#define k else
+#define u while(
+#define g av()
+#define c ax(
+#define f ==
+#define aj =mmap(NULL, 99999, PROT_EXEC | PROT_WRITE | PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0)
+#define j ()
+#define O return 
+#define l a)
+#define A int 
+#define n 0)
+#define o aw(
+#define p 1)
+#define q s)
+A e,C,J,m,T,U,K,v,P,i,ak,Q,D,V,al,Z,G,R,y;
+L(l{
+r D++=a;
+}
+w j{
+b V){
+m=r V++;
+b m f 2){
+V=0;
+m=al;
+}
+}
+k m=fgetc(ak);
+}
+am j{
+O isalnum(m)|m f 95;
+}
+an j{
+b m f 92){
+w j;
+b m f 110)m=10;
+}
+}
+g{
+A a,s,h;
+u isspace(m)|m f 35){
+b m f 35){
+w j;
+g;
+b e f 536){
+g;
+L(32);
+t e=1;
+t(e+4)=D;
+}
+u m!=10){
+L(m);
+w j;
+}
+L(m);
+L(2);
+}
+w j;
+}
+J=0;
+e=m;
+b am j){
+L(32);
+Z=D;
+u am j){
+L(m);
+w j;
+}
+b isdigit(e)){
+C=strtol(Z,0,n;
+e=2;
+}
+k{
+r D=32;
+e=strstr(Q,Z-p-Q;
+r D=0;
+e=e*8+256;
+b e>536){
+e=T+e;
+b t e f p{
+V=t(e+4);
+al=m;
+w j;
+g;
+}
+}
+}
+}
+k{
+w j;
+b e f 39){
+e=2;
+an j;
+C=m;
+w j;
+w j;
+}
+k b e f 47&m f 42){
+w j;
+u m){
+u m!=42)w j;
+w j;
+b m f 47)m=0;
+}
+w j;
+g;
+}
+k{
+a="++#m--%am*@R<^1c/@%[_[H3c%@%[_[H3c+@.B#d-@%:_^BKd<<Z/03e>>`/03e<=0f>=/f<@.f>@1f==&g!='g&&k||#l&@.BCh^@.BSi|@.B+j~@/%Yd!@&d*@b";
+u s=r a++){
+h=r a++;
+C=0;
+u(J=r a++-98)<n C=C*64+J+64;
+b s f e&(h f m|h f 64)){
+b h f m){
+w j;
+e=1;
+}
+break;
+}
+}
+}
+}
+}
+o d){
+u d&&d!=-p{
+r v++=d;
+d=d>>8;
+}
+}
+E(a,d){
+r a++=d;
+r a++=d>>8;
+r a++=d>>16;
+r a++=d>>24;
+}
+ao(l{
+A d;
+return(r a&255)|(r(a+p&255)<<8|(r(a+2)&255)<<16|(r(a+3)&255)<<24;
+}
+ap(a,z){
+A d;
+u l{
+d=ao(l;
+b r(a-p f 5){
+b z>=G&&z<i)E(a,z+y);
+k E(a,z-K+R+y);
+}
+k{
+E(a,z-a-4);
+}
+a=d;
+}
+}
+H(l{
+ap(a,v);
+}
+x(d,l{
+o d);
+E(v,l;
+a=v;
+v=v+4;
+O a;
+}
+M(l{
+x(184,l;
+}
+I(l{
+O x(233,l;
+}
+aa(s,l{
+o 1032325);
+O x(132+s,l;
+}
+aq(l{
+o 49465);
+M(n;
+o 15);
+o a+144);
+o 192);
+}
+W(s,l{
+A d;
+o s+131);
+d=t a;
+b d&&d<512)x(133,d);
+k{
+a=a+4;
+t a=x(5,t l;
+}
+}
+ab(q{
+A d,a,h,F;
+d=1;
+b e f 34){
+M(i+y);
+u m!=34){
+an j;
+r i++=m;
+w j;
+}
+r i=0;
+i=i+4&-4;
+w j;
+g;
+}
+k{
+F=J;
+h=C;
+a=e;
+g;
+b a f 2){
+M(h);
+}
+k b F f 2){
+ab(n;
+x(185,n;
+b a f 33)aq(h);
+k o h);
+}
+k b a f 40){
+B j;
+g;
+}
+k b a f 42){
+g;
+a=e;
+g;
+g;
+b e f 42){
+g;
+g;
+g;
+g;
+a=0;
+}
+g;
+ab(n;
+b e f 61){
+g;
+o 80);
+B j;
+o 89);
+o 392+(a f 256));
+}
+k b l{
+b a f 256)o 139);
+k o 48655);
+v++;
+}
+}
+k b a f 38){
+W(10,e);
+g;
+}
+k{
+d=0;
+b e f 61&q{
+g;
+B j;
+W(6,l;
+}
+k b e!=40){
+W(8,l;
+b J f 11){
+W(0,l;
+o C);
+g;
+}
+}
+}
+}
+b e f 40){
+b d)o 80);
+h=x(60545,n;
+g;
+s=0;
+u e!=41){
+B j;
+x(2393225,q;
+b e f 44)g;
+s=s+4;
+}
+E(h,q;
+g;
+b d){
+x(2397439,q;
+s=s+4;
+}
+k{
+a=a+4;
+t a=x(232,t l;
+}
+b q x(50305,q;
+}
+}
+X(q{
+A a,d,h;
+b s--f p ab(p;
+k{
+X(q;
+h=0;
+u s f J){
+d=e;
+a=C;
+g;
+b s>8){
+h=aa(a,h);
+X(q;
+}
+k{
+o 80);
+X(q;
+o 89);
+b s f 4|s f 5){
+aq(l;
+}
+k{
+o l;
+b d f 37)o 146);
+}
+}
+}
+b h&&s>8){
+h=aa(a,h);
+M(a^p;
+I(5);
+H(h);
+M(l;
+}
+}
+}
+B j{
+X(11);
+}
+ac j{
+B j;
+O aa(0,n;
+}
+S(q{
+A h,d,a;
+b e f 288){
+g;
+g;
+h=ac j;
+g;
+S(q;
+b e f 312){
+g;
+d=I(n;
+H(h);
+S(q;
+H(d);
+}
+k{
+H(h);
+}
+}
+k b e f 352|e f 504){
+a=e;
+g;
+g;
+b a f 352){
+d=v;
+h=ac j;
+}
+k{
+b e!=59)B j;
+g;
+d=v;
+h=0;
+b e!=59)h=ac j;
+g;
+b e!=41){
+a=I(n;
+B j;
+I(d-v-5);
+H(l;
+d=a+4;
+}
+}
+g;
+S(&h);
+I(d-v-5);
+H(h);
+}
+k b e f 123){
+g;
+ar(p;
+u e!=125)S(q;
+g;
+}
+k{
+b e f 448){
+g;
+b e!=59)B j;
+U=I(U);
+}
+k b e f 400){
+g;
+t s=I(t q;
+}
+k b e!=59)B j;
+g;
+}
+}
+ar(q{
+A h;
+u e f 256|e!=-1&!q{
+b e f 256){
+g;
+u e!=59){
+b q{
+P=P+4;
+t e=-P;
+}
+k{
+t e=i;
+i=i+4;
+}
+g;
+b e f 44)g;
+}
+g;
+}
+k{
+t e=v;
+g;
+g;
+h=8;
+u e!=41){
+t e=h;
+h=h+4;
+g;
+b e f 44)g;
+}
+g;
+U=P=0;
+o 15042901);
+h=x(60545,n;
+S(n;
+H(U);
+o 50121);
+E(h,P);
+}
+}
+}
+c d){
+E(i,d);
+i=i+4;
+}
+ad(d,l{
+c d);
+d=d+134512640;
+c d);
+c d);
+c l;
+c l;
+}
+ae(q{
+A a,h,d,N,z,F;
+N=0;
+a=Q;
+u p{
+a++;
+h=a;
+u r a!=32&&a<D)a++;
+b a f D)break;
+e=T+(h-Q)*8+256-8;
+z=t e;
+d=t(e+4);
+b d&&z!=p{
+b!z){
+b!q{
+memcpy(i,h,a-h);
+i=i+a-h+1;
+}
+k b s f p{
+c N+22);
+c n;
+c n;
+c 16);
+N=N+a-h+1;
+}
+k{
+N++;
+u d){
+h=ao(d);
+F=r(d-p!=5;
+E(d,-F*4);
+c d-K+R+y);
+c N*256+F+p;
+d=h;
+}
+}
+}
+k b!q{
+ap(d,z);
+}
+}
+}
+}
+au(F){
+A Y,af,as,ag,at,ah,d,a,ai;
+R=i;
+ai=v-K;
+v=K;
+o 5264472);
+a=t(T+592);
+x(232,a-v-5);
+o 50057);
+M(p;
+o 32973);
+i=i+ai;
+af=i;
+i++;
+i=strcpy(i,"libc.so.6")+10;
+i=strcpy(i,"libdl.so.2")+11;
+ae(n;
+as=i-af;
+i=(i+3)&-4;
+ag=i;
+c n;
+c n;
+c n;
+c n;
+ae(p;
+at=i;
+d=(i-ag)/16;
+c p;
+c d);
+c p;
+c n;
+a=2;
+u a<d)c a++);
+c n;
+ah=i;
+ae(2);
+memcpy(R,K,ai);
+Y=i;
+i=G;
+c 1179403647);
+c 65793);
+c n;
+c n;
+c 196610);
+c p;
+c R+y);
+c 48);
+c n;
+c n;
+c 2097204);
+c 3);
+c 3);
+ad(144,19);
+c 4);
+c p;
+c p;
+ad(0,Y-G);
+c 7);
+c 4096);
+c 2);
+ad(164,88);
+c 6);
+c 4);
+i=strcpy(i,"/lib/ld-linux.so.2")+20;
+c p;
+c p;
+c p;
+c 11);
+c 4);
+c at+y);
+c 6);
+c ag+y);
+c 5);
+c af+y);
+c 10);
+c as);
+c 11);
+c 16);
+c 17);
+c ah+y);
+c 18);
+c Y-ah);
+c 19);
+c 8);
+c n;
+c n;
+a=fopen(F,"w");
+fwrite(G,1,Y-G,l;
+fclose(l;
+}
+main(int d, char **l{
+b d<3){
+printf("usage: otccelf file.c outfile\n");
+O 0;
+}
+D=strcpy(Q aj," int if else while break return for define main ")+48;
+i=G aj;
+v=K aj;
+T aj;
+a=a+4;
+ak=fopen(t a,"r");
+y=134512640-G;
+i=i+252;
+v=v+17;
+w j;
+g;
+ar(n;
+a=a+4;
+au(t l;
+O 0;
+}
+