From 5a8b4aaef32f7249ee18ed52ef6b26ff9a695df3 Mon Sep 17 00:00:00 2001 From: Eli Zaretskii Date: Mon, 3 Nov 2003 06:21:45 +0000 Subject: [PATCH] From David Ponce: document segfaults with the Linux kernels that enable the Exec-shield functionality. --- etc/PROBLEMS | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/etc/PROBLEMS b/etc/PROBLEMS index a59b496bf75..9f75c20faf5 100644 --- a/etc/PROBLEMS +++ b/etc/PROBLEMS @@ -1,6 +1,32 @@ This file describes various problems that have been encountered in compiling, installing and running GNU Emacs. +* Segfault on GNU/Linux using certain recent versions of the Linux kernel. + +With certain recent Linux kernels (like the one of Redhat Fedora Core +1), the new "Exec-shield" functionality is enabled by default, which +creates a different memory layout that breaks the emacs dumper. + +You can check the Exec-shield state like this: + + cat /proc/sys/kernel/exec-shield + +It returns 1 or 2 when Exec-shield is enabled, 0 otherwise. Please +read your system documentation for more details on Exec-shield and +associated commands. + +When Exec-shield is enabled, building Emacs will segfault during the +execution of this command: + +temacs --batch --load loadup [dump|bootstrap] + +To work around this problem, it is necessary to temporarily disable +Exec-shield while building Emacs, using the `setarch' command like +this: + + setarch i386 ./configure + setarch i386 make + * Characters are displayed as empty boxes or with wrong font under X. This can occur when two different versions of FontConfig are used. -- 2.30.2