| Message ID | 20210628103856.15407-1-szabolcs.nagy@arm.com |
|---|---|
| State | Committed |
| Commit | 3101b967874fb7d54a23f75fe93c310143e64af6 |
| Headers |
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Subject: [COMMITTED] arm: align stack in clone [BZ 28020]
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From: Szabolcs Nagy via Libc-alpha <libc-alpha@sourceware.org>
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|
| Series |
[COMMITTED] arm: align stack in clone [BZ 28020]
|
|
Checks
| Context | Check | Description |
|---|---|---|
| dj/TryBot-32bit | fail | Patch caused testsuite regressions |
Commit Message
Szabolcs Nagy
June 28, 2021, 10:38 a.m. UTC
The arm PCS requires 8 byte aligned stack at function entry. Previously unaligned stack could crash the clone child. Fixes bug 28020. --- sysdeps/unix/sysv/linux/arm/clone.S | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/sysdeps/unix/sysv/linux/arm/clone.S b/sysdeps/unix/sysv/linux/arm/clone.S index 44eefee3fc..05596cb7a5 100644 --- a/sysdeps/unix/sysv/linux/arm/clone.S +++ b/sysdeps/unix/sysv/linux/arm/clone.S @@ -31,6 +31,8 @@ ENTRY(__clone) @ sanity check args cmp r0, #0 + @ align sp + and r1, r1, #-8 ite ne cmpne r1, #0 moveq r0, #-EINVAL