linux-user: move TargetFdTrans functions to their own file

This will ease to move out syscall functions from syscall.c

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20180823222215.13781-1-laurent@vivier.eu>

linux-user/Makefile.objs

@@ -1,7 +1,7 @@
 obj-y = main.o syscall.o strace.o mmap.o signal.o \
 	elfload.o linuxload.o uaccess.o uname.o \
 	safe-syscall.o $(TARGET_ABI_DIR)/signal.o \
-        $(TARGET_ABI_DIR)/cpu_loop.o exit.o
+        $(TARGET_ABI_DIR)/cpu_loop.o exit.o fd-trans.o
 
 obj-$(TARGET_HAS_BFLT) += flatload.o
 obj-$(TARGET_I386) += vm86.o

linux-user/fd-trans.h

@@ -0,0 +1,97 @@
+/*
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef FD_TRANS_H
+#define FD_TRANS_H
+
+typedef abi_long (*TargetFdDataFunc)(void *, size_t);
+typedef abi_long (*TargetFdAddrFunc)(void *, abi_ulong, socklen_t);
+typedef struct TargetFdTrans {
+    TargetFdDataFunc host_to_target_data;
+    TargetFdDataFunc target_to_host_data;
+    TargetFdAddrFunc target_to_host_addr;
+} TargetFdTrans;
+
+extern TargetFdTrans **target_fd_trans;
+
+extern unsigned int target_fd_max;
+
+static inline TargetFdDataFunc fd_trans_target_to_host_data(int fd)
+{
+    if (fd >= 0 && fd < target_fd_max && target_fd_trans[fd]) {
+        return target_fd_trans[fd]->target_to_host_data;
+    }
+    return NULL;
+}
+
+static inline TargetFdDataFunc fd_trans_host_to_target_data(int fd)
+{
+    if (fd >= 0 && fd < target_fd_max && target_fd_trans[fd]) {
+        return target_fd_trans[fd]->host_to_target_data;
+    }
+    return NULL;
+}
+
+static inline TargetFdAddrFunc fd_trans_target_to_host_addr(int fd)
+{
+    if (fd >= 0 && fd < target_fd_max && target_fd_trans[fd]) {
+        return target_fd_trans[fd]->target_to_host_addr;
+    }
+    return NULL;
+}
+
+static inline void fd_trans_register(int fd, TargetFdTrans *trans)
+{
+    unsigned int oldmax;
+
+    if (fd >= target_fd_max) {
+        oldmax = target_fd_max;
+        target_fd_max = ((fd >> 6) + 1) << 6; /* by slice of 64 entries */
+        target_fd_trans = g_renew(TargetFdTrans *,
+                                  target_fd_trans, target_fd_max);
+        memset((void *)(target_fd_trans + oldmax), 0,
+               (target_fd_max - oldmax) * sizeof(TargetFdTrans *));
+    }
+    target_fd_trans[fd] = trans;
+}
+
+static inline void fd_trans_unregister(int fd)
+{
+    if (fd >= 0 && fd < target_fd_max) {
+        target_fd_trans[fd] = NULL;
+    }
+}
+
+static inline void fd_trans_dup(int oldfd, int newfd)
+{
+    fd_trans_unregister(newfd);
+    if (oldfd < target_fd_max && target_fd_trans[oldfd]) {
+        fd_trans_register(newfd, target_fd_trans[oldfd]);
+    }
+}
+
+extern TargetFdTrans target_packet_trans;
+#ifdef CONFIG_RTNETLINK
+extern TargetFdTrans target_netlink_route_trans;
+#endif
+extern TargetFdTrans target_netlink_audit_trans;
+extern TargetFdTrans target_signalfd_trans;
+extern TargetFdTrans target_eventfd_trans;
+#if (defined(TARGET_NR_inotify_init) && defined(__NR_inotify_init)) || \
+    (defined(CONFIG_INOTIFY1) && defined(TARGET_NR_inotify_init1) && \
+     defined(__NR_inotify_init1))
+extern TargetFdTrans target_inotify_trans;
+#endif
+#endif