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signal: Move sys_siglist to a compat symbol

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The symbol was deprecated by strsignal and its usage imposes issues
such as copy relocations.

Its internal name is changed to __sys_siglist and __sys_sigabbrev to
avoid static linking usage.  The compat code is also refactored, since
both Linux and Hurd usage the same strategy: export the same array with
different object sizes.

The libSegfault change avoids calling strsignal on the SIGFAULT signal
handler (the current usage is already sketchy, adding a call that
potentially issue locale internal function is even sketchier).

Checked on x86_64-linux-gnu and i686-linux-gnu. I also run a check-abi
on all affected platforms.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Adhemerval Zanella
2020-04-24 11:09:00 -03:00
parent e4e11b1dba
commit b1ccfc061f
14 changed files with 93 additions and 116 deletions
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2
stdio-common/psignal.c
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@ -34,7 +34,7 @@ psignal (int sig, const char *s)
else
colon = ": ";
if (sig >= 0 && sig < NSIG && (desc = _sys_siglist[sig]) != NULL)
if (sig >= 0 && sig < NSIG && (desc = __sys_siglist[sig]) != NULL)
(void) __fxprintf (NULL, "%s%s%s\n", s, colon, _(desc));
else
{