void load48KRom() {
int romLength = sizeof(rom48K) / sizeof(rom48K[0]);
int romIndex;
for(romIndex = 0x0; romIndex < romLength; romIndex++) {
memWrite(romIndex, rom48K[romIndex]);
}
}
/**
* @brief Receive stream from libcloud
* @param pInjectData
* @param uDataLen
* @return
*/
static C_RESULT ts_inject_data(C_U8 *pInjectData, C_U32 uDataLen)
{
if (memWrite(pInjectData, 1, uDataLen, &(ts_param.file)) <= 0)
{
m_ts_status = 0;
memReset(&(ts_param.file));
}
if (ts_param.fp)
fwrite(pInjectData, 1, uDataLen, ts_param.fp);
return 1;
}
/**
* Function: memCond
* This function returns the value to be sent as valM
* and reads or writes from memory if needed
* Return: value to be used as valM
*/
unsigned int memCond(unsigned int valE,bool * memError) {
bool tempEr = FALSE;
unsigned int ret = M.valA;
if(memRead()){
ret = getWord(valE,&tempEr);
*memError = tempEr;
}
else if(memWrite()){
putWord(valE,M.valA,&memError);
ret = M.valA;
}
return ret;
}
int test()
{
#define WINDOWSIZ 100
char buf[WINDOWSIZ];
char ttt[100];
int i;
getctime( ttt );
printf( "start 1 %s\n" ,ttt);
for(i=0;i<BUFSZ/1024;i+=100 ){
buf[0] = i;
memWrite( buf , i * 1024 , WINDOWSIZ );
}
for(i=0;i<BUFSZ/1024;i+=100 ){
buf[0] = i;
memRead( buf , (i + 50) * 1024 , WINDOWSIZ );
}
getctime(ttt);
printf( "start 2 %s\n" ,ttt);
for(i=0;i<BUFSZ/1024;i+=100 ){
buf[0] = i;
memWrite( buf , (i + 10 )* 1024 , WINDOWSIZ );
}
for(i=0;i<BUFSZ/1024;i+=100 ){
buf[0] = i;
memRead( buf , (i + 10) * 1024 , WINDOWSIZ );
}
getctime(ttt);
printf( "start 3 %s\n" ,ttt);
}
/**
* @param fp le fichier elf original
* @param seg le segment a reloger
* @param mem l'ensemble des segments
* @param endianness le boutisme du programme
* @param symtab la table des symbole du programme
* @param symtab_libc la table des symbole de la libc (NULL si inutile)
* @param fp_libc le fichier elf de la libc (NULL si inutile)
* @brief Cette fonction effectue la relocation du segment passe en parametres
* @brief l'ensemble des segments doit deja avoir ete charge en memoire.
*
* VOUS DEVEZ COMPLETER CETTE FONCTION POUR METTRE EN OEUVRE LA RELOCATION !!
*/
void reloc_segment(FILE* fp, segment seg, mem memory,unsigned int endianness,stab* symtable,stab* symtab_libc,FILE* fp_libc) {
byte *ehdr = __elf_get_ehdr( fp );
uint32_t scnsz = 0;
Elf32_Rel *rel = NULL;
char* reloc_name = malloc(strlen(seg.name)+strlen(RELOC_PREFIX_STR)+1);
scntab section_tab;
scntab section_tab_libc;
// on recompose le nom de la section
memcpy(reloc_name,RELOC_PREFIX_STR,strlen(RELOC_PREFIX_STR)+1);
strcat(reloc_name,seg.name);
// on recupere le tableau de relocation et la table des sections
rel = (Elf32_Rel *)elf_extract_scn_by_name( ehdr, fp, reloc_name, &scnsz, NULL );
elf_load_scntab(fp ,32, §ion_tab);
if (symtab_libc!=NULL && fp_libc!=NULL)
elf_load_scntab(fp_libc ,32, §ion_tab_libc);
if (rel != NULL &&seg.content!=NULL && seg.size._32!=0) {
if(verbose>0) {
INFO_MSG("--------------Relocation of %s-------------------\n",seg.name) ;
INFO_MSG("Number of symbol to relocate: %ld\n",scnsz/sizeof(*rel)) ;
}
//------------------------------------------------------
int i=0;
uint sym;
uint type;
uint info;
uint offset;
//display :
if(verbose>0) {
//printf("scnsz=%d\n", scnsz);
//print_scntab(section_tab);
printf("Offset Info Type Sym.Value Sym.Name\n");
while(i<scnsz/sizeof(*rel)) {
info=rel[i].r_info;
offset=rel[i].r_offset;
FLIP_ENDIANNESS(info) ;
FLIP_ENDIANNESS(offset) ;
sym=ELF32_R_SYM(info);
type=ELF32_R_TYPE(info);
if (type>32) {
WARNING_MSG("Unknown type : %d",type);
}
else {
printf("%08X %08X %-14s %08X %s\n",offset,info,MIPS32_REL[type],sym,(*symtable).sym[sym].name);
i++;
}
}
}
i=0;
//------------------------------------------------------
//Reloc :
int A,V,P;
//int segnum;
uint32_t S;
while(i<scnsz/sizeof(*rel)) {
info=rel[i].r_info;
offset=rel[i].r_offset;
FLIP_ENDIANNESS(info) ;
FLIP_ENDIANNESS(offset) ;
sym=ELF32_R_SYM(info);
type=ELF32_R_TYPE(info);
//printf("Relocating symbol %d\n",i );
//segnum=seg_from_scnidx((*symtable).sym[sym].scnidx,(*symtable),memory);
//if(segnum==-1){
// WARNING_MSG("Couldn't resolve scndix correspondance");
// break;
//}
//S=memory->seg[segnum].start._32+(*symtable).sym[sym].addr._32;//a verif
//printf("sym=%d, symbtable size=%d\n", sym,(*symtable).size);
if(addr_from_symnb(sym, (*symtable), memory,&S)==-1) {
WARNING_MSG("Trying to resolve scndix correspondance in libcsymtab");
}
P=seg.start._32+offset;
memRead(P,1,&A);
//printf("Relocation type %s\n",MIPS32_REL[type] );
switch (type) {
case 2:
V=S+A;
//printf("V= %X,S=%X,A=%X,P=%X\n",V,S,A,P);
memWrite(P,1,V);
break;
case 4:
V=(A&0xFC00000)|((((A<<2)|((P&0xF0000000)+S))>>2)&0x3FFFFFF);
//printf("V= %X,S=%X,A=%X,P=%X\n",V,S,A,P);
memWrite(P,1,V);
break;
case 5:
;
uint nexttype=rel[i+1].r_info;
uint nextoffset=rel[i+1].r_offset;
FLIP_ENDIANNESS(nexttype);
FLIP_ENDIANNESS(nextoffset);
nexttype=ELF32_R_TYPE(nexttype);
if(nexttype!=6) {
WARNING_MSG("R_MIPS_HI16 not followed by R_MIIPS_LO16 : %s",MIPS32_REL[nexttype]);
}
else {
int P2=seg.start._32+nextoffset,A2;
memRead(P2,1,&A2);
int AHL;
AHL=(A<<16)+(short)(A2);
//printf("A2=%X short A2=%X\n",A2, (short)A2 );
//printf("AHL : %X\n",AHL );
//printf("Total=%X AHL+S=%X, (AHL+S)&0xFFFF=%X, diff=%X\n",((AHL+S-(short)(AHL+S))>>16),AHL+S,(AHL+S)&0xFFFF,AHL+S-(short)AHL+S) ;
V=(A & 0xFFFF0000)|( ((AHL+S-(short)(AHL+S))>>16) &0xFFFF);
//printf("V= %X,S=%X,A=%X,A2=%X,P=%X,P2=%X, AHL=%X\n",V,S,A,A2,P,P2,AHL);
memWrite(P,1,V);
}
break;
case 6:
;
int previoustype=rel[i-1].r_info;
int previousoffset=rel[i-1].r_offset;
FLIP_ENDIANNESS(previoustype);
FLIP_ENDIANNESS(previousoffset);
previoustype=ELF32_R_TYPE(previoustype);
if(previoustype!=5) {
WARNING_MSG("R_MIPS_LO16 not preceded by R_MIPS_HI16 : %s",MIPS32_REL[previoustype]);
}
else {
int32_t P2=seg.start._32+previousoffset,A2;
memRead(P2,1,&A2);
int32_t AHL=(A2<<16)+(short)(A);
V=(A&0xFFFF0000)|((short)(AHL+S)&0xFFFF);
//printf("V= %X,S=%X,A=%X,P=%X\n",V,S,A,P);
memWrite(P,1,V);
}
break;
default:
if (type>32) {
WARNING_MSG("Unknown type : %d, relocation impossible for element %d",type,i);
}
else {
WARNING_MSG("Unknown type : %s(code : %d), relocation impossible for element %d",MIPS32_REL[type],type,i);
}
break;
}
i++;
}
//------------------------------------------------------
}
del_scntab(section_tab);
free( rel );
free( reloc_name );
free( ehdr );
}
