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| author | Pavel Kozlov <pavel.kozlov@synopsys.com> | 2022-12-21 20:19:46 +0400 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-02-17 16:12:52 -0300 |
| commit | 87abcf9a6e34d64f556b0b9d3ccd2689b2c2e0b6 (patch) | |
| tree | 47c2a3a396560d3e66930d45bc9cef87c99d94a2 | |
| parent | a9b3b770f596c9f9fd059f5a90a4e1db3c4f3835 (diff) | |
| download | glibc-87abcf9a6e34d64f556b0b9d3ccd2689b2c2e0b6.tar.gz | |
ARC: align child stack in clone
The ARCv2 ABI requires 4 byte stack pointer alignment. Don't allow to
use unaligned child stack in clone. As the stack grows down,
align it down.
This was pointed by misc/tst-misalign-clone-internal and
misc/tst-misalign-clone tests. Stack alignmet fixes these tests
fails.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
| -rw-r--r-- | sysdeps/unix/sysv/linux/arc/clone.S | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/arc/clone.S b/sysdeps/unix/sysv/linux/arc/clone.S index e41a5942eb..7666496256 100644 --- a/sysdeps/unix/sysv/linux/arc/clone.S +++ b/sysdeps/unix/sysv/linux/arc/clone.S @@ -41,6 +41,7 @@ ENTRY (__clone) cmp r0, 0 /* @fn can't be NULL. */ + and r1,r1,-4 /* @child_stack be 4 bytes aligned per ABI. */ cmp.ne r1, 0 /* @child_stack can't be NULL. */ bz L (__sys_err) |