[glibc] Revert "Allow glibc to be compiled without EXEC_PAGESIZE"

[glibc] Revert "Allow glibc to be compiled without EXEC_PAGESIZE"

[Samuel Thibault]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=16c8dfba14ff7596ad3aea941a240f8abcdc50e6

commit 16c8dfba14ff7596ad3aea941a240f8abcdc50e6
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Mon Apr 22 23:00:18 2024 +0200

    Revert "Allow glibc to be compiled without EXEC_PAGESIZE"
    
    This reverts commit 49aa652db810ebdca3a662ebd5b0468bd08ec688.
    
    This is still being discussed.

Diff:
---
 elf/dl-support.c | 6 +-----
 elf/rtld.c       | 2 --
 libio/libioP.h   | 2 +-
 3 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/elf/dl-support.c b/elf/dl-support.c
index cb0bbd213f..451932dd03 100644
--- a/elf/dl-support.c
+++ b/elf/dl-support.c
@@ -135,11 +135,7 @@ void *_dl_random;
 #include <dl-procruntime.c>
 #include <dl-procinfo.c>
 
-size_t _dl_pagesize
-#ifdef EXEC_PAGESIZE
-  = EXEC_PAGESIZE
-#endif
-;
+size_t _dl_pagesize = EXEC_PAGESIZE;
 
 size_t _dl_minsigstacksize = CONSTANT_MINSIGSTKSZ;
 
diff --git a/elf/rtld.c b/elf/rtld.c
index d116a436f5..e9525ea987 100644
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -358,9 +358,7 @@ struct rtld_global_ro _rtld_global_ro attribute_relro =
     ._dl_debug_fd = STDERR_FILENO,
     ._dl_lazy = 1,
     ._dl_fpu_control = _FPU_DEFAULT,
-#ifdef EXEC_PAGESIZE
     ._dl_pagesize = EXEC_PAGESIZE,
-#endif
     ._dl_inhibit_cache = 0,
     ._dl_profile_output = "/var/tmp",
 
diff --git a/libio/libioP.h b/libio/libioP.h
index 1a7f547e0c..1af287b19f 100644
--- a/libio/libioP.h
+++ b/libio/libioP.h
@@ -852,7 +852,7 @@ extern off64_t _IO_seekpos_unlocked (FILE *, off64_t, int)
 #  define MAP_ANONYMOUS MAP_ANON
 # endif
 
-# if !defined(MAP_ANONYMOUS)
+# if !defined(MAP_ANONYMOUS) || !defined(EXEC_PAGESIZE)
 #  undef _G_HAVE_MMAP
 #  define _G_HAVE_MMAP 0
 # endif