行业解决方案查看所有行业解决方案
IDA 用于解决软件行业的关键问题。
发布时间:2023-04-25 14: 52: 34
Action name: OpUserOffset
This command converts the immediate operand of the current instruction/data to a complex offset expression.
Please click here to learn more about complex offsets.
If a range is selected using the anchor, IDA will perform 'en masse' conversion. It will convert immediate operands of all instructions in the selected range to offsets. However, IDA will ask you first the lower and upper limits of immediate operand value. If the an operand value is >= lower limit and <= upper limit then the operand will be converted to offset, otherwise it will be left unmodified.
If the cursor is on the first operand (the cursor is before ',') then the first operand will be affected; otherwise, all other operands will be affected.
If the offset base is specified as 0xFFFFFFFF, then IDA will create "an automatic offset". Automatic offsets mean that the actual value of the base will be calculated by IDA.
The following offset attributes are available:
Treat the base address as a plain number
if checked, IDA will treat the base address as a number.
In this case, IDA will not create a cross-reference to it
and the base address will be printed as a number,
not as an offset expression.
Offset points past the main object
Offsets of this type point past an object end.
They do not cause an object created/deletion.
Use image base as offset base
These offsets are based on the image base.
There is no need to explicitly specify the offset base.
These offsets are displayed in a concise form:
rva func
instead of
offset func - imagebase
If you intend to reassemble the output file, execute the
following IDC statement:
set_inf_attr(INF_GENFLAGS, get_inf_attr(INF_GENFLAGS) & ~INFFL_ALLASM);
Subtract operand value
Use this option when the operand value should be substracted
from the base to get the target address. In this case the displayed
expression will be displayed as
offset base - target
instead of the usual
offset target - base
Signed operand
Use this option if the operand should be interpreted
as a signed value. This option is only available for OFF_REF8,
OFF_REF16, OFF_REF32 and OFF_REF64 offset types.
Operand value of 0 is invalid
If the operand value is 0, the value will be highlighted in red.
Operand value of NOT 0 is invalid
If the operand value is zero's complement (i.e. all bits are set),
the value will be highlighted in red.
For example a OFF_REF16 with an operand value of 0xFFFF would be invalid.
Use the current address as the offset base
The offset base is dynamically calculated and is equal to the address of
the current element:
- for standalone items: their start address
- for arrays: the start of the array element
- for structures: the start of the structure field
The offset expression is displayed in the following concise form:
offset target - $
where "$" denotes the start of the element (and is assembler-dependent).
To create offsets to structure members use Convert to struct offset command.
See also:
offset by data segment/no
offset by current segment
Edit|Operand types|Offset submenu.
Enter #th operand manually commands.
Set operand type
中文翻译:
操作名称:OpAnyOffset
此命令将当前指令/数据的立即数操作数转换为任意段的偏移量。
IDA将要求为偏移量选择一个基段。
如果使用锚点选择了一个范围,IDA将执行“整体”转换。它将把所
选范围内的所有指令的立即数转换为偏移。然而,IDA将首先询问即时操作数值的下限和上限。如果操作数值为>=下限和<=上限,则操作数将转换为偏移量,否则将保持不变。
如果光标位于第一个操作数上(光标在“,”之前),则第一个操作将受到影响;否则,所有其他操作数都将受到影响。
要创建结构成员的偏移量,请使用“
转换为结构偏移量”命令。另请参阅:按数据段偏移量/不按当前段偏移量编辑|操作数类型|偏移量子菜单。
手动输入第#个操作数命令。设置操作数类型
展开阅读全文
︾
读者也喜欢这些内容:
IDA怎么修改字符串内容?IDA修改后怎么保存?
在软件开发和逆向工程领域,IDA Pro是一种极其强悍的工具,广泛用于程序剖析、调试和修改。它不仅支持多种处理器架构,还提供了大量的作用,以适应高档讲解的必须。本文将围绕ida怎么修改字符串内容,ida修改后怎么保存这一主题,详细描述怎样在IDA中更改字符串内容,及其修改后的存放方式。此外,我们还将探讨IDA转变的应用场景,帮助读者更深入地了解IDA的实际应用价值。...
阅读全文 >
exe文件反编译工具有哪些 exe文件反编译为VB工程
在软件开发和逆向工程领域,exe文件的反编译是一项复杂但极为重要的任务。它涉及将已编译的程序恢复为源代码,以便进行分析和修改。...
阅读全文 >
什么叫反汇编 反汇编的软件有哪些
在计算机科学和软件工程领域,反汇编一直是一个关键的概念。与其紧密相连的反编译技术和各种反汇编软件也在不断地演进和发展。今天我们将深入探讨什么叫反汇编,反汇编的软件有哪些,以及反汇编的软件哪款比较好。我们将全方位解析这一复杂而又迷人的主题,帮助你更好地理解和掌握反汇编的核心内容。...
阅读全文 >
ida文件怎么打开 ida怎么加载文件
在计算机领域中,IDA(Interactive DisAssembler)作为一款强大的逆向工程工具,广泛应用于软件分析和漏洞挖掘等领域。然而,对于初次接触IDA的用户而言,如何正确地打开IDA文件、加载文件以及处理文件打不开的情况可能会是一些疑惑。本文将详细探讨IDA文件的打开和加载过程,同时分享一些应对IDA文件打不开情况的解决方法。...
阅读全文 >