Bug #6098
closed
ld(1) should not require symbols which identify group sections be global
100%
Description
It seems to me entirely valid that the symbol which identify SHF_GROUP sections via .sh_info should be local (or whatever else). The only specifications in the gABI regarding globalness relate to referencing the group, not the group identifying itself.
The check refusing STB_LOCAL should be removed.
Possibly additionally the check forbidding the signature symbol be defined should also be removed, I don't see why it must be defined, but I'm less certain of the implications of fixing that.
Updated by Rich Lowe about 7 years ago
https://gist.github.com/richlowe/0b305637a17fa54041ce is a diff of the conservative fix for the issue as encountered by Igor.
Updated by Rich Lowe about 7 years ago
In fact, the gABI specifically states, here: http://www.sco.com/developers/gabi/2003-12-17/ch4.sheader.html#section_groups
"The referenced signature symbol is not restricted. Its containing symbol table section need not be a member of the group, for example."
Which could easily be read to suggest that the SHN_UNDEF check is also invalid, as suspected (you'll note that the checks implemented closely, but not precisely, reflect those described for references from outside the group for comdat groups).
I think all the checks for signature symbol validity are bogus, beyond the basic checks already performed (that the sh_link/sh_info fields actually are valid in a more general sense)
Updated by Electric Monk almost 7 years ago
- Status changed from Feedback to Closed
- % Done changed from 50 to 100
git commit 359db861fd14071f8a25831efe3bf3790980d071
commit 359db861fd14071f8a25831efe3bf3790980d071
Author: Richard Lowe <richlowe@richlowe.net>
Date: 2015-08-17T15:54:32.000Z
6098 ld(1) should not require symbols which identify group sections be global
Reviewed by: Igor Kozhukhov <ikozhukhov@gmail.com>
Reviewed by: Dan McDonald <danmcd@omniti.com>
Reviewed by: Gordon Ross <gwr@nexenta.com>
Approved by: Robert Mustacchi <rm@joyent.com>