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s390/vdso: Use symbolic constants for the PHDR permission flags

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While at it explicitly specify GNU_EH_FRAME PHDR to be read-only.

Inspired by x86 commit 8717b02b8c ("x86/entry/vdso: Include
GNU_PROPERTY and GNU_STACK PHDRs").

Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Jens Remus <jremus@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Jens Remus 2026-07-13 16:42:31 +02:00 committed by Vasily Gorbik
parent dc161efb6d
commit 6e17a45b3c
1 changed files with 7 additions and 4 deletions
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11
arch/s390/kernel/vdso/vdso.lds.S
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@ -82,12 +82,15 @@ SECTIONS
* We must supply the ELF program headers explicitly to get just one
* PT_LOAD segment, and set the flags explicitly to make segments read-only.
*/
#define PF_R FLAGS(4)
#define PF_RX FLAGS(5)
PHDRS
{
text PT_LOAD FILEHDR PHDRS FLAGS(5); /* PF_R|PF_X */
dynamic PT_DYNAMIC FLAGS(4); /* PF_R */
note PT_NOTE FLAGS(4); /* PF_R */
eh_frame_hdr PT_GNU_EH_FRAME;
text PT_LOAD PF_RX FILEHDR PHDRS;
dynamic PT_DYNAMIC PF_R;
note PT_NOTE PF_R;
eh_frame_hdr PT_GNU_EH_FRAME PF_R;
}
/*