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From: "bruno at clisp dot org" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug string/29546] New: sigdescr_np for SIGEMT is useless
Date: Sat, 03 Sep 2022 11:40:23 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29546

            Bug ID: 29546
           Summary: sigdescr_np for SIGEMT is useless
           Product: glibc
           Version: 2.34
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: string
          Assignee: unassigned at sourceware dot org
          Reporter: bruno at clisp dot org
  Target Milestone: ---

Created attachment 14315
  --> https://sourceware.org/bugzilla/attachment.cgi?id=3D14315&action=3Ded=
it
test case

The function sigdescr_np is supposed to "return the message describing the
signal signum", see
https://www.gnu.org/software/libc/manual/html_node/Signal-Messages.html.

However, for the value SIGEMT, it returns a string without real information.
If a user did not know what SIGEMT means before, he won't know it afterward=
s.

How to reproduce:
$ gcc -Wall foo.c
$ ./a.out
SIGEMT -> EMT trap

Suggestion: Use the description string "Instruction emulation needed" inste=
ad.
That's what is understandable from the FreeBSD man page
https://www.freebsd.org/cgi/man.cgi?sektion=3D3&query=3Dsignal .

Seen on
- Debian GNU/Hurd, with glibc 2.34.
- Linux/sparc64, with glibc 2.33.

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