assembly - 如何扩展 TASM 宏

Question

有没有办法用 Borland 的 TASM 扩展宏？我想转换一个 TASM 兼容的 .ASM 文件以查看他所有的宏扩展。找不到执行此操作的任何选项。

Answer 1

使用 TASM 的命令行选项/la 生成扩展列表。从此列表中，您可以看到高级和低级扩展。此功能适用于 TASM 的所有版本，直至 1988 年的初始版本。

例如，假设您有以下 TASM 宏:

OUTPUTMESSAGE MACRO hConsole,stringval
LOCAL msg
    .data
msg  db  '&stringval',0
    .code
    call outputString ,hConsole,OFFSET msg
ENDM ;OUTPUTMESSAGE

并且您想查看以下源是如何展开的:

OUTPUTMESSAGE hConsole,<This app was assembled with TASM version >
OUTPUTMESSAGE hConsole,%??version

用/la 生成的 list 文件(我碰巧使用的是 5.4 版)生成以下内容:

    516                      OUTPUTMESSAGE hConsole,<This app was assembled with TASM version >
1   517 0000018F                 .data
1   518 00000000  54 68 69 73 20 61 70+  ??0000  db  'This app was assembled with TASM version ',0
    519       70 20 77 61 73 20 61+
    520       73 73 65 6D 62 6C 65+
    521       64 20 77 69 74 68 20+
    522       54 41 53 4D 20 76 65+
    523       72 73 69 6F 6E 20 00
1   524 0000002A                 .code
2   525 0000018F  C8 0000 00             ENTERD  00000h,0
2   526                      call outputString ,hConsole,OFFSET ??0000
3   527 00000193  68 00000000r           PUSH    OFFSET ??0000
3   528 00000198  FF 75 08           PUSH    hConsole
3   529 0000019B  E8 FFFFFE9B            CALL    outputString
    530                      OUTPUTMESSAGE hConsole,%??version
1   531 000001A0                 .data
1   532 0000002A  31 32 38 34 00     ??0001  db  '1284',0
1   533 0000002F                 .code
1   534                      call outputString ,hConsole,OFFSET ??0001
2   535 000001A0  68 0000002Ar           PUSH    OFFSET ??0001
2   536 000001A5  FF 75 08           PUSH    hConsole
2   537 000001A8  E8 FFFFFE8E            CALL    outputString

列对应于 [深度] [行号] [偏移量] [机器代码] [来源]。不幸的是，您会发现 [line#] 列并不是特别有用。以下是 TASM5 用户指南中描述列的片段:

[depth] - indicates the level of nesting of Include files and macros within your
          listing file.

[line#] - is the number of the line in the listing file (not including header
          and title lines). Line numbers are particularly useful when the
          cross-reference feature of Turbo Assembler, which refers to lines by
          line number, is used. Be aware that the line numbers in [line#] are
          not the source module line numbers. For example, if a macro is
          expanded or a file is included, the line-number field will continue to
          advance, even though the current line in the source module stays the
          same. To translate a line number (for example, one that the
          cross-referencer produced) back to the source file, you must look up
          the line number in the listing file, and then find that same line (by
          eye, not by number) in the source file.

[offset] - is the offset in the current segment of the start of the machine code
           generated by the associated assembler source line.

[machine_code] - is the actual sequence of hexadecimal byte and word values that
                 is assembled from the associated assembler source line.

[source] - is simply the original assembler line, comments and all. Some
           assembler lines, such as those that contain only comments, don't
           generate any machine code; these lines have no [offset] or [machine_
           code] fields, but do have a line number.