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Bug #5298

closed

fabs is 0-sized, confuses dis(1) and others

Added by Rich Lowe over 8 years ago. Updated over 8 years ago.

Status:
Closed
Priority:
Normal
Assignee:
Rich Lowe
Category:
lib - userland libraries
Start date:
2014-11-07
Due date:
% Done:

100%

Estimated time:
Difficulty:
Medium
Tags:
Gerrit CR:
External Bug:

Description

Because of the synonyms use in libm, fabs is defined to be __fabs

We have an asm implementation on i386, which does:

ENTRY(fabs)

but then needs to use the 'fabs' instruction, so does:

#undef fabs

And then when it's done does

SET_SIZE(fabs)

It never redefines fabs=__fabs though, so it sets the size of the wrong symbol (the weak one). Leaving the function symbol of incorrectly 0 size.

This confuses dis(1), me, and probably other things and people.

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 #1

Updated by Electric Monk over 8 years ago

  • Status changed from New to Closed
  • % Done changed from 90 to 100

git commit ddc0e0b53c661f6e439e3b7072b3ef353eadb4af

commit  ddc0e0b53c661f6e439e3b7072b3ef353eadb4af
Author: Richard Lowe <richlowe@richlowe.net>
Date:   2014-11-26T22:05:43.000Z

    5261 libm should stop using synonyms.h
    5298 fabs is 0-sized, confuses dis(1) and others
    Reviewed by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
    Approved by: Gordon Ross <gwr@nexenta.com>

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