glibc/SOURCES/glibc-upstream-2.34-54.patch
2022-05-17 15:48:09 +00:00

33 lines
960 B
Diff

commit 7af07fe795f43e53d31be1c6f9adba7e05f87b0b
Author: Xi Ruoyao <xry111@mengyan1223.wang>
Date: Thu Aug 12 20:31:59 2021 +0000
mips: align stack in clone [BZ #28223]
The MIPS O32 ABI requires 4 byte aligned stack, and the MIPS N64 and N32
ABI require 8 byte aligned stack. Previously if the caller passed an
unaligned stack to clone the the child misbehaved.
Fixes bug 28223.
(cherry picked from commit 1f51cd9a860ee45eee8a56fb2ba925267a2a7bfe)
diff --git a/sysdeps/unix/sysv/linux/mips/clone.S b/sysdeps/unix/sysv/linux/mips/clone.S
index 71d9dba8bd9e8f9e..43a5ad3a400d9504 100644
--- a/sysdeps/unix/sysv/linux/mips/clone.S
+++ b/sysdeps/unix/sysv/linux/mips/clone.S
@@ -55,6 +55,13 @@ NESTED(__clone,4*SZREG,sp)
.set at
#endif
+ /* Align stack to 4/8 bytes per the ABI. */
+#if _MIPS_SIM == _ABIO32
+ li t0,-4
+#else
+ li t0,-8
+#endif
+ and a1,a1,t0
/* Sanity check arguments. */
li v0,EINVAL