From d2e594d71509faf36cf851a69370db34a4f5fa65 Mon Sep 17 00:00:00 2001 From: Aurelien Jarno Date: Tue, 14 Dec 2021 22:44:35 +0100 Subject: 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 --- sysdeps/unix/sysv/linux/riscv/clone.S | 3 +++ 1 file changed, 3 insertions(+) (limited to 'sysdeps/unix/sysv/linux/riscv') diff --git a/sysdeps/unix/sysv/linux/riscv/clone.S b/sysdeps/unix/sysv/linux/riscv/clone.S index 12f91a20d3..161e83c7e3 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. */ -- cgit 1.4.1