elf: Copy p_align of PT_GNU_STACK for stack alignment

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.

diff --git a/bfd/elf.c b/bfd/elf.c
index 468d37f5028fe78886c91bb7088edb13621a9425..89484ceb2339b94626b5dfbf7ff23c2e30654a44 100644 (file)
--- 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