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CMP, TEST instruction support

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This commit is contained in:
Nekotekina 2016-06-23 00:39:39 +03:00
parent a19b721c26
commit 63e690ca11
1 changed files with 72 additions and 5 deletions
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77
Utilities/Thread.cpp
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@ -127,6 +127,8 @@ enum x64_op_t : u32
X64OP_NONE, X64OP_NONE,
X64OP_LOAD, // obtain and put the value into x64 register X64OP_LOAD, // obtain and put the value into x64 register
X64OP_LOAD_BE, X64OP_LOAD_BE,
X64OP_LOAD_CMP,
X64OP_LOAD_TEST,
X64OP_STORE, // take the value from x64 register or an immediate and use it X64OP_STORE, // take the value from x64 register or an immediate and use it
X64OP_STORE_BE, X64OP_STORE_BE,
X64OP_MOVS, X64OP_MOVS,
@ -433,7 +435,7 @@ void decode_x64_reg_op(const u8* code, x64_op_t& out_op, x64_reg_t& out_reg, siz
case 4: out_op = X64OP_AND; break; case 4: out_op = X64OP_AND; break;
case 5: out_op = X64OP_SUB; break; case 5: out_op = X64OP_SUB; break;
case 6: out_op = X64OP_XOR; break; case 6: out_op = X64OP_XOR; break;
default: out_op = X64OP_NONE; break; // CMP default: out_op = X64OP_LOAD_CMP; break;
} }
out_reg = X64_IMM8; out_reg = X64_IMM8;
@ -452,7 +454,7 @@ void decode_x64_reg_op(const u8* code, x64_op_t& out_op, x64_reg_t& out_reg, siz
case 4: out_op = X64OP_AND; break; case 4: out_op = X64OP_AND; break;
case 5: out_op = X64OP_SUB; break; case 5: out_op = X64OP_SUB; break;
case 6: out_op = X64OP_XOR; break; case 6: out_op = X64OP_XOR; break;
default: out_op = X64OP_NONE; break; // CMP default: out_op = X64OP_LOAD_CMP; break;
} }
out_reg = oso ? X64_IMM16 : X64_IMM32; out_reg = oso ? X64_IMM16 : X64_IMM32;
@ -471,7 +473,7 @@ void decode_x64_reg_op(const u8* code, x64_op_t& out_op, x64_reg_t& out_reg, siz
case 4: out_op = X64OP_AND; break; case 4: out_op = X64OP_AND; break;
case 5: out_op = X64OP_SUB; break; case 5: out_op = X64OP_SUB; break;
case 6: out_op = X64OP_XOR; break; case 6: out_op = X64OP_XOR; break;
default: out_op = X64OP_NONE; break; // CMP default: out_op = X64OP_LOAD_CMP; break;
} }
out_reg = X64_IMM8; out_reg = X64_IMM8;
@ -611,6 +613,32 @@ void decode_x64_reg_op(const u8* code, x64_op_t& out_op, x64_reg_t& out_reg, siz
} }
break; break;
} }
case 0xf6:
{
switch (auto mod_code = get_modRM_reg(code, 0))
{
case 0: out_op = X64OP_LOAD_TEST; break;
default: out_op = X64OP_NONE; break; // TODO...
}
out_reg = X64_IMM8;
out_size = 1;
out_length += get_modRM_size(code) + 1;
return;
}
case 0xf7:
{
switch (auto mod_code = get_modRM_reg(code, 0))
{
case 0: out_op = X64OP_LOAD_TEST; break;
default: out_op = X64OP_NONE; break; // TODO...
}
out_reg = oso ? X64_IMM16 : X64_IMM32;
out_size = get_op_size(rex, oso);
out_length += get_modRM_size(code) + (oso ? 2 : 4);
return;
}
} }
out_op = X64OP_NONE; out_op = X64OP_NONE;
@ -990,9 +1018,43 @@ bool handle_access_violation(u32 addr, bool is_writing, x64_context* context)
{ {
case X64OP_LOAD: case X64OP_LOAD:
case X64OP_LOAD_BE: case X64OP_LOAD_BE:
case X64OP_LOAD_CMP:
case X64OP_LOAD_TEST:
{ {
u32 value; u32 value;
if (is_writing || !thread->read_reg(addr, value) || !put_x64_reg_value(context, reg, d_size, op == X64OP_LOAD ? se_storage<u32>::swap(value) : value)) if (is_writing || !thread->read_reg(addr, value))
{
return false;
}
if (op != X64OP_LOAD_BE)
{
value = se_storage<u32>::swap(value);
}
if (op == X64OP_LOAD_CMP)
{
u64 rvalue;
if (!get_x64_reg_value(context, reg, d_size, i_size, rvalue) || !set_x64_cmp_flags(context, d_size, value, rvalue))
{
return false;
}
break;
}
if (op == X64OP_LOAD_TEST)
{
u64 rvalue;
if (!get_x64_reg_value(context, reg, d_size, i_size, rvalue) || !set_x64_cmp_flags(context, d_size, value & rvalue, 0))
{
return false;
}
break;
}
if (!put_x64_reg_value(context, reg, d_size, value))
{ {
return false; return false;
} }
@ -1003,7 +1065,12 @@ bool handle_access_violation(u32 addr, bool is_writing, x64_context* context)
case X64OP_STORE_BE: case X64OP_STORE_BE:
{ {
u64 reg_value; u64 reg_value;
if (!is_writing || !get_x64_reg_value(context, reg, d_size, i_size, reg_value) || !thread->write_reg(addr, op == X64OP_STORE ? se_storage<u32>::swap((u32)reg_value) : (u32)reg_value)) if (!is_writing || !get_x64_reg_value(context, reg, d_size, i_size, reg_value))
{
return false;
}
if (!thread->write_reg(addr, op == X64OP_STORE ? se_storage<u32>::swap((u32)reg_value) : (u32)reg_value))
{ {
return false; return false;
} }