Re: RFC: Formalization of the Intel assembly syntax (PR53929)

[LIU Hao <lh_mouse@126.com>]

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在 2024-01-23 16:38, Jan Beulich 写道:
> Right, but this is very "draft". You can't blindly assume the gas you use
> actually can deal with quotation.

Let's assume that for the time being, but there's something else; see below.


>> .refptr.bx:
>>           .quad   bx
> 
> Sure, this one needs quoting then, too.

The attached patch contains `&& name[0] != '*'` with a reason: In the function `assemble_name_raw` 
in 'gcc/varasm.cc', if `name` starts with a `*`, then its remaining part is output without 
decoration. I have no idea what `*` means; this `.quad bx` thing apparently results from something like

    assemble_name_raw (file, "*bx");

Quoting this would break the i686 DWARF2 code, which may contain an arithmetic expression like

    .long LXXYY-1    # "LXXYY" minus one

If it was quoted like `.long "LXXYY-1"`, it would mean something very different and cause linker errors.


-- 
Best regards,
LIU Hao


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