From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 94EC98494 for ; Fri, 10 Mar 2023 14:36:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E690BC4339C; Fri, 10 Mar 2023 14:36:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678459004; bh=18b0VtJeatDWdr6Sssa89b09xyzb0PdeDS8EuZt3M4g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Zz6fC0I3o58GO86pACNbdmXhDwPv0nYI4IcrW/ksZdFR6nK7hXtWBhBT3QG8DP2dQ KJRSHx2xytoMXGYgqVk231BRVUbS7f3ZBhuNwp73kWgCcS4tBAt/A8qysZLHysrIks us9oqmzwTn0v6vDkVvtm/+MI1mbt7vqwulBu/g94= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ilya Leoshkevich , Heiko Carstens Subject: [PATCH 5.4 215/357] s390: discard .interp section Date: Fri, 10 Mar 2023 14:38:24 +0100 Message-Id: <20230310133744.193393738@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230310133733.973883071@linuxfoundation.org> References: <20230310133733.973883071@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Ilya Leoshkevich commit e9c9cb90e76ffaabcc7ca8f275d9e82195fd6367 upstream. When debugging vmlinux with QEMU + GDB, the following GDB error may occur: (gdb) c Continuing. Warning: Cannot insert breakpoint -1. Cannot access memory at address 0xffffffffffff95c0 Command aborted. (gdb) The reason is that, when .interp section is present, GDB tries to locate the file specified in it in memory and put a number of breakpoints there (see enable_break() function in gdb/solib-svr4.c). Sometimes GDB finds a bogus location that matches its heuristics, fails to set a breakpoint and stops. This makes further debugging impossible. The .interp section contains misleading information anyway (vmlinux does not need ld.so), so fix by discarding it. Signed-off-by: Ilya Leoshkevich Cc: Signed-off-by: Heiko Carstens Signed-off-by: Greg Kroah-Hartman --- arch/s390/kernel/vmlinux.lds.S | 1 + 1 file changed, 1 insertion(+) --- a/arch/s390/kernel/vmlinux.lds.S +++ b/arch/s390/kernel/vmlinux.lds.S @@ -189,5 +189,6 @@ SECTIONS DISCARDS /DISCARD/ : { *(.eh_frame) + *(.interp) } }