[Nasm-bugs] [Bug 3392679] New: [Feature request] Macros whose content is listed verbatim (including comments) to listing file
noreply-nasm at dev.nasm.us
noreply-nasm at dev.nasm.us
Mon Jun 8 12:20:00 PDT 2020
https://bugzilla.nasm.us/show_bug.cgi?id=3392679
Bug ID: 3392679
Summary: [Feature request] Macros whose content is listed
verbatim (including comments) to listing file
Product: NASM
Version: unspecified
Hardware: All
OS: All
Status: OPEN
Severity: enhancement
Priority: Medium
Component: Assembler
Assignee: nobody at nasm.us
Reporter: pushbx at ulukai.org
CC: chang.seok.bae at intel.com, gorcunov at gmail.com,
hpa at zytor.com, nasm-bugs at nasm.us
Obtained from: Unknown
I recently came upon a use case for wrapping some large functions in multi-line
macros, which are used once to emit their content at one or another point. I
implemented that in my ldosboot boot.asm [1]. The point of this is that I can
easily select where to invoke the mmacro, [2] without duplicating the same code
in two places.
There is a disadvantage to this, however: In the listing file (when the macro
is given without ".nolist") the expansion of the macro is listed without
comments, and with all whitespace sequences reduced to single blanks each. So
when using the listing file for debugging, one either has to read the part that
defines the mmacro (to get the full comments and indentation) or the part where
the mmacro is invoked (to get the opcodes which the code is assembled into).
This could be avoided by putting each such block into small include files
instead, but I don't like that solution much.
Therefore, I propose that the multi-line macro facility could be extended to
allow (optionally) for "verbatim listing" macros. This should result in the
listing with the actual opcodes also preserving the whitespace and comments. I
figure this is likely nontrivial, but I wanted to suggest it at least.
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