commit 9de8011c328021f10588a8acb418daf5121d5f3d
Author: Aurelien Jarno <aurelien@aurel32.net>
Date:   Tue Dec 14 22:44:35 2021 +0100

    riscv: align stack in clone [BZ #28702]
    
    The RISC-V ABI [1] mandates that "the stack pointer shall be aligned to
    a 128-bit boundary upon procedure entry". This as not the case in clone.
    
    This fixes the misc/tst-misalign-clone-internal and
    misc/tst-misalign-clone tests.
    
    Fixes bug 28702.
    
    [1] https://github.com/riscv-non-isa/riscv-elf-psabi-doc
    
    (cherry picked from commit d2e594d71509faf36cf851a69370db34a4f5fa65)

diff --git a/sysdeps/unix/sysv/linux/riscv/clone.S b/sysdeps/unix/sysv/linux/riscv/clone.S
index 12f91a20d3bb34f5..161e83c7e3786b8d 100644
--- a/sysdeps/unix/sysv/linux/riscv/clone.S
+++ b/sysdeps/unix/sysv/linux/riscv/clone.S
@@ -32,6 +32,9 @@
 	.text
 LEAF (__clone)
 
+	/* Align stack to a 128-bit boundary as per RISC-V ABI.  */
+	andi		a1,a1,ALMASK
+
 	/* Sanity check arguments.  */
 	beqz		a0,L (invalid)	/* No NULL function pointers.  */
 	beqz		a1,L (invalid)	/* No NULL stack pointers.  */