Add the helper functions get_errno and host_to_target_errno. get_errno returns either the system call results, or the -errno when system call indicates failure by returning -1. Host_to_target_errno returns errno (since on FreeBSD they are the same on all architectures) along with a comment about why it's the identity.
Signed-off-by: Warner Losh <i...@bsdimp.com> --- bsd-user/freebsd/os-syscall.c | 23 +++++++++++++++++++++++ bsd-user/qemu.h | 3 ++- 2 files changed, 25 insertions(+), 1 deletion(-) diff --git a/bsd-user/freebsd/os-syscall.c b/bsd-user/freebsd/os-syscall.c index 7e2bedb918d..2e84cf350b1 100644 --- a/bsd-user/freebsd/os-syscall.c +++ b/bsd-user/freebsd/os-syscall.c @@ -44,6 +44,29 @@ void target_set_brk(abi_ulong new_brk) { } +/* + * errno conversion. + */ +abi_long get_errno(abi_long ret) +{ + + if (ret == -1) { + return -host_to_target_errno(errno); + } else { + return ret; + } +} + +int host_to_target_errno(int err) +{ + /* + * All the BSDs have the property that the error numbers are uniform across + * all architectures for a given BSD, though they may vary between different + * BSDs. + */ + return err; +} + bool is_error(abi_long ret) { diff --git a/bsd-user/qemu.h b/bsd-user/qemu.h index e5742bd6c03..56042ddbc5d 100644 --- a/bsd-user/qemu.h +++ b/bsd-user/qemu.h @@ -246,9 +246,10 @@ extern unsigned long target_dflssiz; extern unsigned long target_maxssiz; extern unsigned long target_sgrowsiz; -/* syscall.c */ +/* os-syscall.c */ abi_long get_errno(abi_long ret); bool is_error(abi_long ret); +int host_to_target_errno(int err); /* os-sys.c */ abi_long do_freebsd_sysarch(void *cpu_env, abi_long arg1, abi_long arg2); -- 2.33.1