semihosting: Split out semihost_sys_isatty
Split out the non-ARM specific portions of SYS_ISTTY to a
reusable function. This handles all GuestFD.
Add a common_semi_istty_cb helper to translate the Posix
error return, 0+ENOTTY, to the Arm semihosting not-a-file
success result.
Reviewed-by: Luc Michel <lmichel@kalray.eu>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
diff --git a/include/semihosting/syscalls.h b/include/semihosting/syscalls.h
index 841a93d..c60ebaf 100644
--- a/include/semihosting/syscalls.h
+++ b/include/semihosting/syscalls.h
@@ -42,4 +42,7 @@
void semihost_sys_lseek(CPUState *cs, gdb_syscall_complete_cb complete,
int fd, int64_t off, int gdb_whence);
+void semihost_sys_isatty(CPUState *cs, gdb_syscall_complete_cb complete,
+ int fd);
+
#endif /* SEMIHOSTING_SYSCALLS_H */
