From: "H.J. Lu" <hjl.tools@gmail.com>
To: binutils@sourceware.org
Subject: [PATCH] elf: Copy p_align of PT_GNU_STACK for stack alignment
Date: Tue, 5 Jul 2022 12:50:22 -0700 [thread overview]
Message-ID: <20220705195022.346635-1-hjl.tools@gmail.com> (raw)
commit 74e315dbfe5200c473b226e937935fb8ce391489
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Mon Dec 13 19:46:04 2021 -0800
elf: Set p_align to the minimum page size if possible
may ignore p_align of PT_GNU_STACK when copying ELF program header if
the maximum page size is larger than p_align of PT_LOAD segments. Copy
p_align of PT_GNU_STACK since p_align of PT_GNU_STACK describes stack
alignment, not page size,
PR binutils/29319
* elf.c (copy_elf_program_header): Copy p_align of PT_GNU_STACK
for stack alignment.
---
bfd/elf.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/bfd/elf.c b/bfd/elf.c
index 468d37f5028..89484ceb233 100644
--- a/bfd/elf.c
+++ b/bfd/elf.c
@@ -7685,7 +7685,9 @@ copy_elf_program_header (bfd *ibfd, bfd *obfd)
map->p_paddr = segment->p_paddr;
map->p_paddr_valid = p_paddr_valid;
map->p_align = segment->p_align;
- map->p_align_valid = p_palign_valid;
+ /* Keep p_align of PT_GNU_STACK for stack alignment. */
+ map->p_align_valid = (map->p_type == PT_GNU_STACK
+ || p_palign_valid);
map->p_vaddr_offset = 0;
if (map->p_type == PT_GNU_RELRO
--
2.36.1
next reply other threads:[~2022-07-05 19:50 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-05 19:50 H.J. Lu [this message]
2022-07-06 6:20 ` Jan Beulich
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