assembly - What do .xstabs assembler directives mean, and where are they documented? -

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i've not been able find documentation on .xstabs assembler directive means, particularly on sparc architecture.

i found following in local copy of man as:

-s places stabs in .stabs section. default, stabs placed in stabs.excl sections, stripped out static linker, ld(1), during final execution. when -s option used, stabs remain in final executable because .stab sections not stripped static linker.

but doesn't discuss x stabs, , doesn't explain stabs are, either.

the sparc assembly language reference manual: appendix a: pseudo-operations has them:

.xstabs <various parameters>

not descriptive.

any explanations or pointers useful resources gratefully appreciated.

further googling turned stabs interface -- sun studio 9 (pdf, google htmlized-copy) seems explain things, albeit in more detailed manner hoping (so additional answers appreciated).


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