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Added code generation for register and immediate PUSH/POP, RET, relative CALL and JMP instructions.

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This commit is contained in:
TomW 2015-03-30 20:42:33 +01:00
commit a97e89e857
8 changed files with 371 additions and 17 deletions
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99
src/codegen_ops_x86.h
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@ -915,3 +915,102 @@ static x86seg *FETCH_EA(x86seg *op_ea_seg, uint32_t fetchdat, int op_ssegs, uint
return FETCH_EA_32(op_ea_seg, fetchdat, op_ssegs, op_pc, 0);
return FETCH_EA_16(op_ea_seg, fetchdat, op_ssegs, op_pc);
}
static void LOAD_STACK_TO_EA(int off)
{
if (stack32)
{
addbyte(0x8b); /*MOVL EAX,[ESP]*/
addbyte(0x05 | (REG_EAX << 3));
addlong((uint32_t)&ESP);
if (off)
{
addbyte(0x83); /*ADD EAX, off*/
addbyte(0xc0 | (0 << 3) | REG_EAX);
addbyte(off);
}
}
else
{
addbyte(0x0f); /*MOVZX EAX,W[ESP]*/
addbyte(0xb7);
addbyte(0x05 | (REG_EAX << 3));
addlong((uint32_t)&ESP);
if (off)
{
addbyte(0x66); /*ADD AX, off*/
addbyte(0x05);
addword(off);
}
}
}
static void LOAD_EBP_TO_EA(int off)
{
if (stack32)
{
addbyte(0x8b); /*MOVL EAX,[EBP]*/
addbyte(0x05 | (REG_EAX << 3));
addlong((uint32_t)&EBP);
if (off)
{
addbyte(0x83); /*ADD EAX, off*/
addbyte(0xc0 | (0 << 3) | REG_EAX);
addbyte(off);
}
}
else
{
addbyte(0x0f); /*MOVZX EAX,W[EBP]*/
addbyte(0xb7);
addbyte(0x05 | (REG_EAX << 3));
addlong((uint32_t)&EBP);
if (off)
{
addbyte(0x66); /*ADD AX, off*/
addbyte(0x05);
addword(off);
}
}
}
static void SP_MODIFY(int off)
{
if (stack32)
{
if (off < 0x80)
{
addbyte(0x83); /*ADD [ESP], off*/
addbyte(0x05);
addlong((uint32_t)&ESP);
addbyte(off);
}
else
{
addbyte(0x81); /*ADD [ESP], off*/
addbyte(0x05);
addlong((uint32_t)&ESP);
addlong(off);
}
}
else
{
if (off < 0x80)
{
addbyte(0x66); /*ADD [SP], off*/
addbyte(0x83);
addbyte(0x05);
addlong((uint32_t)&SP);
addbyte(off);
}
else
{
addbyte(0x66); /*ADD [SP], off*/
addbyte(0x81);
addbyte(0x05);
addlong((uint32_t)&SP);
addword(off);
}
}
}