From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 71DC43858020; Mon, 5 Jun 2023 20:59:01 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 71DC43858020 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1685998741; bh=J29y8I+cveocI3XoOFd/ckOENJvdLev1aJVIcsCiFZ8=; h=From:To:Subject:Date:In-Reply-To:References:From; b=TTzkKMykOw6ahiBdxuaxM5F0NNacn/t2bRIWFt1Dl7QBO6ZySsH57CKfZKw2qZloH 9K7yoN5VtRm2nZjXJEGnk50MHkXvI2/9z0o/Jw+bcTdJh1JN41yWMUHctJ31VxiX4f ogw7tI4x/1LUwG9fSnFc5u9L0H1ZY/3LFxdIsj1w= From: "tneumann at users dot sourceforge.net" To: gcc-bugs@gcc.gnu.org Subject: [Bug libgcc/109712] Segmentation fault in linear_search_fdes Date: Mon, 05 Jun 2023 20:59:01 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: libgcc X-Bugzilla-Version: 13.1.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: tneumann at users dot sourceforge.net X-Bugzilla-Status: REOPENED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109712 --- Comment #26 from Thomas Neumann = --- (In reply to Florian Weimer from comment #23) >=20 > u is the original read pointer as far as I can see. So it looks like it > should look like this: >=20 > diff --git a/libgcc/unwind-dw2-fde-dip.c b/libgcc/unwind-dw2-fde-dip.c > index 6223f5f18a2..5a6352227cc 100644 > --- a/libgcc/unwind-dw2-fde-dip.c > +++ b/libgcc/unwind-dw2-fde-dip.c > @@ -403,8 +403,8 @@ find_fde_tail (_Unwind_Ptr pc, > BFD ld generates. */ > signed value __attribute__ ((mode (SI))); > memcpy (&value, p, sizeof (value)); > + eh_frame =3D p + value > p +=3D sizeof (value); > - dbase =3D value; /* No adjustment because pcrel has base 0. */ > } > else > p =3D read_encoded_value_with_base (hdr->eh_frame_ptr_enc, that seems to be correct, the test case succeeds with that patch.=