Releases the references to the iovec created by lock_iovec. Signed-off-by: Warner Losh <i...@bsdimp.com> --- bsd-user/freebsd/os-syscall.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+)
diff --git a/bsd-user/freebsd/os-syscall.c b/bsd-user/freebsd/os-syscall.c index c21759ae7ce..d49945f0fcc 100644 --- a/bsd-user/freebsd/os-syscall.c +++ b/bsd-user/freebsd/os-syscall.c @@ -167,6 +167,29 @@ struct iovec *lock_iovec(int type, abi_ulong target_addr, return NULL; } +void unlock_iovec(struct iovec *vec, abi_ulong target_addr, + int count, int copy) +{ + struct target_iovec *target_vec; + int i; + + target_vec = lock_user(VERIFY_READ, target_addr, + count * sizeof(struct target_iovec), 1); + if (target_vec) { + for (i = 0; i < count; i++) { + abi_ulong base = tswapal(target_vec[i].iov_base); + abi_long len = tswapal(target_vec[i].iov_len); + if (len < 0) { + break; + } + unlock_user(vec[i].iov_base, base, copy ? vec[i].iov_len : 0); + } + unlock_user(target_vec, target_addr, 0); + } + + free(vec); +} + /* * do_syscall() should always have a single exit point at the end so that * actions, such as logging of syscall results, can be performed. All errnos -- 2.33.1