diff options
| -rw-r--r-- | sysdeps/unix/sysv/linux/aarch64/vfork.S | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/sysdeps/unix/sysv/linux/aarch64/vfork.S b/sysdeps/unix/sysv/linux/aarch64/vfork.S index e71e492da3..cfaf4a1ffb 100644 --- a/sysdeps/unix/sysv/linux/aarch64/vfork.S +++ b/sysdeps/unix/sysv/linux/aarch64/vfork.S @@ -33,8 +33,14 @@ ENTRY (__vfork) cmn x0, #4095 b.cs .Lsyscall_error + cbz x0, L(child) RET - +L(child): + /* Return with indirect branch in the child to support GCS. + Clear x30 to crash early if the child tries to ret. */ + mov x1, x30 + mov x30, 0 + br x1 PSEUDO_END (__vfork) libc_hidden_def (__vfork) |