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From: Aurelien Jarno <>
Cc: Xi Ruoyao <>
Subject: [COMMITTED 2.34 2/2] mips: increase stack alignment in clone to match the ABI
Date: Tue, 14 Dec 2021 23:19:19 +0100	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

From: Xi Ruoyao <>

In "mips: align stack in clone [BZ #28223]"
(commit 1f51cd9a860ee45eee8a56fb2ba925267a2a7bfe) I made a mistake: I
misbelieved one "word" was 2-byte and "doubleword" should be 4-byte.
But in MIPS ABI one "word" is defined 32-bit (4-byte), so "doubleword" is
8-byte [1], and "quadword" is 16-byte [2].

[1]: "System V Application Binary Interface: MIPS(R) RISC Processor
      Supplement, 3rd edition", page 3-31
[2]: "MIPSpro(TM) 64-Bit Porting and Transition Guide", page 23

(cherry picked from commit 0f62fe053273ff6c62ac95c59b7687c964737b00)
 sysdeps/unix/sysv/linux/mips/clone.S | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sysdeps/unix/sysv/linux/mips/clone.S b/sysdeps/unix/sysv/linux/mips/clone.S
index 43a5ad3a40..fd71b5ca2e 100644
--- a/sysdeps/unix/sysv/linux/mips/clone.S
+++ b/sysdeps/unix/sysv/linux/mips/clone.S
@@ -55,11 +55,11 @@ NESTED(__clone,4*SZREG,sp)
 	.set		at
-	/* Align stack to 4/8 bytes per the ABI.  */
+	/* Align stack to 8/16 bytes per the ABI.  */
 #if _MIPS_SIM == _ABIO32
-	li		t0,-4
 	li		t0,-8
+	li		t0,-16
 	and		a1,a1,t0

      reply	other threads:[~2021-12-14 22:19 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-14 22:19 [COMMITTED 2.34 1/2] mips: align stack in clone [BZ #28223] Aurelien Jarno
2021-12-14 22:19 ` Aurelien Jarno [this message]

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