You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
38 lines
1.5 KiB
38 lines
1.5 KiB
9 months ago
|
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Peter Jones <pjones@redhat.com>
|
||
|
|
Date: Mon, 21 Mar 2022 16:56:10 -0400
|
||
|
|
Subject: [PATCH] modules: Don't allocate space for non-allocable sections.
|
||
|
|
|
||
|
|
Currently when loading grub modules, we allocate space for all sections,
|
||
|
|
including those without SHF_ALLOC set. We then copy the sections that
|
||
|
|
/do/ have SHF_ALLOC set into the allocated memory, leaving some of our
|
||
|
|
allocation untouched forever. Additionally, on platforms with GOT
|
||
|
|
fixups and trampolines, we currently compute alignment round-ups for the
|
||
|
|
sections and sections with sh_size = 0.
|
||
|
|
|
||
|
|
This patch removes the extra space from the allocation computation, and
|
||
|
|
makes the allocation computation loop skip empty sections as the loading
|
||
|
|
loop does.
|
||
|
|
|
||
|
|
Signed-off-by: Peter Jones <pjones@redhat.com>
|
||
|
|
(cherry picked from commit 03215e342f552396ab08125ea769b1e166417ec1)
|
||
|
|
(cherry picked from commit 91518751b9bcba078e3f4385f4b2f6c39cab49cd)
|
||
|
|
---
|
||
|
|
grub-core/kern/dl.c | 3 +++
|
||
|
|
1 file changed, 3 insertions(+)
|
||
|
|
|
||
|
|
diff --git a/grub-core/kern/dl.c b/grub-core/kern/dl.c
|
||
|
|
index 520126beab..ba1b33c20b 100644
|
||
|
|
--- a/grub-core/kern/dl.c
|
||
|
|
+++ b/grub-core/kern/dl.c
|
||
|
|
@@ -290,6 +290,9 @@ grub_dl_load_segments (grub_dl_t mod, const Elf_Ehdr *e)
|
||
|
|
i < e->e_shnum;
|
||
|
|
i++, s = (const Elf_Shdr *)((const char *) s + e->e_shentsize))
|
||
|
|
{
|
||
|
|
+ if (s->sh_size == 0 || !(s->sh_flags & SHF_ALLOC))
|
||
|
|
+ continue;
|
||
|
|
+
|
||
|
|
tsize = ALIGN_UP (tsize, s->sh_addralign) + s->sh_size;
|
||
|
|
if (talign < s->sh_addralign)
|
||
|
|
talign = s->sh_addralign;
|