u8 EncodeDisp(u32 disp,x86_mrm_t* to,u8 flags)
{
//[reg+sdisp8] or [reg+sdisp32]
//sdisp32 support only for now , sdisp8 for later
if (flags&1)
{
if (IsS8(disp))
{
to->flags|=2;
to->disp=disp;
if (flags&4)
return 0;
else
return make_modrm(1,0);
}
}
if (flags&2)
{
to->flags|=4;
to->disp=disp;
if (flags&4)
return 0;
else
return make_modrm(2,0);
}
verify(false);
return 0;
}
void Apply(u8* base)
{
for (u32 i=0;i<externs.size();i++)
{
u8* dest=(u8*)externs[i].dst;
u8* code_offset=base+externs[i].offs;
u8* diff_offset=code_offset+externs[i].size;
u32 diff=(u32)(dest-diff_offset);
if (externs[i].size==1)
{
verify(IsS8(diff));
*code_offset=(u8)diff;
}
else if (externs[i].size==2)
{
*(u16*)code_offset=(u16)diff;
}
else if (externs[i].size==4)
{
*(u32*)code_offset=(u32)diff;
}
}
}
//wut ?
void x86_block::ApplyPatches(u8* base)
{
for (u32 i=0;i<patches.size();i++)
{
u8* dest=(u8*)patches[i].dest;
u8* code_offset=base+patches[i].offset;
u8* diff_offset=code_offset+(patches[i].type&0xF);
if (patches[i].type&16)
{
if (patches[i].lbl->owner==this)
dest = base + patches[i].lbl->target_opcode;
else
dest = patches[i].lbl->owner->x86_buff + patches[i].lbl->target_opcode;
}
u32 diff=(u32)(dest-diff_offset);
if ((patches[i].type&0xF)==1)
{
verify(IsS8(diff));
*code_offset=(u8)diff;
}
else if ((patches[i].type&0xF)==2)
{
*(u16*)code_offset=(u16)diff;
}
else if ((patches[i].type&0xF)==4)
{
*(u32*)code_offset=(u32)diff;
}
}
}
//wut ?
void ppc_block::ApplyPatches(u8* base)
{
for (u32 i=0;i<patches.size();i++)
{
u8* dest=(u8*)patches[i].dest;
u8* code_offset=base+patches[i].offset;
u8* diff_offset=code_offset;//gli wtf?!? +(patches[i].type&0xF);
if (patches[i].type&16)
{
if (patches[i].lbl->owner==this)
dest = base + patches[i].lbl->target_opcode;
else
dest = patches[i].lbl->owner->ppc_buff + patches[i].lbl->target_opcode;
}
s32 diff=(s32)(dest-diff_offset);
if ((patches[i].type&0xF)==1)
{
verify(IsS8(diff));
*code_offset=(u8)diff;
}
else if ((patches[i].type&0xF)==2)
{
*(u16*)code_offset=(u16)diff;
}
else if ((patches[i].type&0xF)==4)
{
*(u32*)code_offset=(u32)diff;
}
else if ((patches[i].type&0xF)==5) // 5 is for BC
{
verify(!(diff&3));
verify(diff<0x10000);
*(u32*)code_offset|=(u32)diff&0xffff;
}
else if ((patches[i].type&0xF)==6) // 6 is for B
{
verify(!(diff&3));
verify(diff<0x04000000);
*(u32*)code_offset|=(u32)diff&0x03ffffff;
}
}
/* process branches */
u32 i;
PowerPC_instr op,newop;
u32 opaddr,jmpaddr;
for(i=0;i<ppc_indx;i+=4)
{
opaddr=(u32)&ppc_buff[i];
op=*(u32*)&ppc_buff[i];
jmpaddr=(op&0x03ffffff)-(opaddr&0x7fffffff);
if((op&0xfc000000) == 0) // b
{
//printf("b %08x %08x %08x\n",opaddr,op,jmpaddr);
GEN_B(newop,jmpaddr>>2,0,0);
*(PowerPC_instr*)opaddr=newop;
}
else if((op&0xfc000000) == 1<<26) // bl
