Use a 64KB page size for pdump

Resolves: #1979804

emacs-64KB-page-size-for-pdump.patch

@@ -0,0 +1,31 @@
+From 216c65b135c2b0be7e048cdc6683873b03b99b9a Mon Sep 17 00:00:00 2001
+From: Lars Ingebrigtsen <larsi@gnus.org>
+Date: Sun, 28 Mar 2021 19:13:00 +0200
+Subject: [PATCH] Use a 64KB page size for pdump
+
+* src/pdumper.c (dump_get_page_size): Use a 64KB page size on all
+architectures, as this many vary between systems (bug#47125).
+---
+ src/pdumper.c | 6 +-----
+ 1 file changed, 1 insertion(+), 5 deletions(-)
+
+diff --git a/src/pdumper.c b/src/pdumper.c
+index 337742fda4..fdd9b3bacb 100644
+--- a/src/pdumper.c
++++ b/src/pdumper.c
+@@ -162,11 +162,7 @@ ptrdiff_t_to_dump_off (ptrdiff_t value)
+ static int
+ dump_get_page_size (void)
+ {
+-#if defined (WINDOWSNT) || defined (CYGWIN)
+-  return 64 * 1024;  /* Worst-case allocation granularity.  */
+-#else
+-  return getpagesize ();
+-#endif
++  return 64 * 1024;
+ }
+ 
+ #define dump_offsetof(type, member)                             \
+-- 
+2.36.1
+

emacs.spec

@@ -5,7 +5,7 @@ Summary:       GNU Emacs text editor
 Name:          emacs
 Epoch:         1
 Version:       27.2
-Release:       7%{?dist}
+Release:       8%{?dist}
 License:       GPLv3+ and CC0-1.0
 URL:           http://www.gnu.org/software/emacs/
 Source0:       https://ftp.gnu.org/gnu/emacs/emacs-%{version}.tar.xz
@@ -28,6 +28,7 @@ Patch1:        emacs-spellchecker.patch
 Patch2:        emacs-system-crypto-policies.patch
 Patch3:        emacs-glibc-2.34.patch
 Patch4:        emacs-ctags-local-command-execute-vulnerability.patch
+Patch5:        emacs-64KB-page-size-for-pdump.patch
 BuildRequires: gcc
 BuildRequires: atk-devel
 BuildRequires: cairo-devel
@@ -191,6 +192,7 @@ Development header files for Emacs.
 %patch2 -p1 -b .system-crypto-policies
 %patch3 -p1 -b .glibc2.34
 %patch4 -p1 -b .ctags-local-command-execute-vulnerability
+%patch5 -p1 -b .64KB-page-size-for-pdump
 autoconf
 
 # We prefer our emacs.desktop file
@@ -481,6 +483,9 @@ rm %{buildroot}%{_datadir}/icons/hicolor/scalable/mimetypes/emacs-document23.svg
 %{_includedir}/emacs-module.h
 
 %changelog
+* Tue Jan 10 2023 Jacek Migacz <jmigacz@redhat.com> - 1:27.2-8
+- Use a 64KB page size for pdump (#1979804)
+
 * Wed Jan 04 2023 Jacek Migacz <jmigacz@redhat.com> - 1:27.2-7
 - Fix ctags local command execute vulnerability (#2149387)