Merge remote-tracking branch 'bonzini/migration-writev' into staging

# By Paolo Bonzini
# Via Paolo Bonzini
* bonzini/migration-writev:
  win32: add readv/writev emulation
  win32: generate console executable again
  win32: move Makefile dependencies on version-obj-y to rules.mak
  win32: add generic RC rules to rules.mak

Message-id: 1367230284-24612-1-git-send-email-pbonzini@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

7 files changed, 72 insertions, 26 deletions

diff --git a/Makefile b/Makefile
index 8aca92f0bd..f91f3b0a11 100644
--- a/Makefile
+++ b/Makefile
@@ -167,13 +167,10 @@ recurse-all: $(SUBDIR_RULES) $(ROMSUBDIR_RULES)
 bt-host.o: QEMU_CFLAGS += $(BLUEZ_CFLAGS)
 
 version.o: $(SRC_PATH)/version.rc config-host.h | version.lo
-	$(call quiet-command,$(WINDRES) -I. -o $@ $<,"  RC    $(TARGET_DIR)$@")
 version.lo: $(SRC_PATH)/version.rc config-host.h
-	$(call quiet-command,$(LIBTOOL) --mode=compile --tag=RC $(WINDRES) -I. -o $@ $<,"lt RC   $(TARGET_DIR)$@")
 
 version-obj-$(CONFIG_WIN32) += version.o
-version-lobj-$(CONFIG_WIN32) += $(if $(LIBTOOL),version.lo)
-Makefile: $(version-obj-y) $(version-lobj-y)
+version-lobj-$(CONFIG_WIN32) += version.lo
 
 
 ######################################################################
diff --git a/Makefile.target b/Makefile.target
index 7e4c77a269..6583b05482 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -18,7 +18,7 @@ ifdef CONFIG_USER_ONLY
 QEMU_PROG=qemu-$(TARGET_ARCH2)
 else
 # system emulator name
-ifneq (,$(findstring -mwindows,$(LIBS)))
+ifneq (,$(findstring -mwindows,$(libs_softmmu)))
 # Terminate program name with a 'w' because the linker builds a windows executable.
 QEMU_PROGW=qemu-system-$(TARGET_ARCH2)w$(EXESUF)
 endif # windows executable
diff --git a/include/qemu-common.h b/include/qemu-common.h
index a39cdba27f..b399d855c1 100644
--- a/include/qemu-common.h
+++ b/include/qemu-common.h
@@ -84,20 +84,6 @@
 # error Unknown pointer size
 #endif
 
-#ifndef CONFIG_IOVEC
-#define CONFIG_IOVEC
-struct iovec {
-    void *iov_base;
-    size_t iov_len;
-};
-/*
- * Use the same value as Linux for now.
- */
-#define IOV_MAX		1024
-#else
-#include <sys/uio.h>
-#endif
-
 typedef int (*fprintf_function)(FILE *f, const char *fmt, ...)
     GCC_FMT_ATTR(2, 3);
 
@@ -122,16 +108,12 @@ static inline char *realpath(const char *path, char *resolved_path)
 void configure_icount(const char *option);
 extern int use_icount;
 
-/* FIXME: Remove NEED_CPU_H.  */
-#ifndef NEED_CPU_H
-
 #include "qemu/osdep.h"
 #include "qemu/bswap.h"
 
-#else
-
+/* FIXME: Remove NEED_CPU_H.  */
+#ifdef NEED_CPU_H
 #include "cpu.h"
-
 #endif /* !defined(NEED_CPU_H) */
 
 /* main function, renamed */
diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
index 8b465fdf2f..42545bcbdb 100644
--- a/include/qemu/osdep.h
+++ b/include/qemu/osdep.h
@@ -1,6 +1,7 @@
 #ifndef QEMU_OSDEP_H
 #define QEMU_OSDEP_H
 
+#include "config-host.h"
 #include <stdarg.h>
 #include <stddef.h>
 #include <stdbool.h>
@@ -161,6 +162,22 @@ int qemu_close(int fd);
 int qemu_create_pidfile(const char *filename);
 int qemu_get_thread_id(void);
 
+#ifndef CONFIG_IOVEC
+struct iovec {
+    void *iov_base;
+    size_t iov_len;
+};
+/*
+ * Use the same value as Linux for now.
+ */
+#define IOV_MAX 1024
+
+ssize_t readv(int fd, const struct iovec *iov, int iov_cnt);
+ssize_t writev(int fd, const struct iovec *iov, int iov_cnt);
+#else
+#include <sys/uio.h>
+#endif
+
 #ifdef _WIN32
 static inline void qemu_timersub(const struct timeval *val1,
                                  const struct timeval *val2,
diff --git a/rules.mak b/rules.mak
index 292a42299f..197a9d7abf 100644
--- a/rules.mak
+++ b/rules.mak
@@ -19,6 +19,10 @@ QEMU_CFLAGS += -I$(<D) -I$(@D)
 
 %.o: %.c
 	$(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  CC    $(TARGET_DIR)$@")
+%.o: %.rc
+	$(call quiet-command,$(WINDRES) -I. -o $@ $<,"  RC    $(TARGET_DIR)$@")
+
+Makefile: $(version-obj-y)
 
 ifeq ($(LIBTOOL),)
 LIBTOOL = /bin/false
@@ -26,9 +30,12 @@ LINK = $(call quiet-command,$(CC) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
        $(sort $(filter %.o, $1)) $(filter-out %.o, $1) $(version-obj-y) \
        $(LIBS),"  LINK  $(TARGET_DIR)$@")
 else
+Makefile: $(version-lobj-y)
 LIBTOOL += $(if $(V),,--quiet)
 %.lo: %.c
 	$(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC $(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  lt CC $@")
+%.lo: %.rc
+	$(call quiet-command,$(LIBTOOL) --mode=compile --tag=RC $(WINDRES) -I. -o $@ $<,"lt RC   $(TARGET_DIR)$@")
 %.lo: %.dtrace
 	$(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC dtrace -o $@ -G -s $<, " lt GEN $(TARGET_DIR)$@")
 
diff --git a/util/iov.c b/util/iov.c
index d32226d644..78bbbe12d0 100644
--- a/util/iov.c
+++ b/util/iov.c
@@ -99,7 +99,7 @@ size_t iov_size(const struct iovec *iov, const unsigned int iov_cnt)
 static ssize_t
 do_send_recv(int sockfd, struct iovec *iov, unsigned iov_cnt, bool do_send)
 {
-#if defined CONFIG_IOVEC && defined CONFIG_POSIX
+#ifdef CONFIG_POSIX
     ssize_t ret;
     struct msghdr msg;
     memset(&msg, 0, sizeof(msg));
diff --git a/util/osdep.c b/util/osdep.c
index 6ae5aaf781..685c8ae889 100644
--- a/util/osdep.c
+++ b/util/osdep.c
@@ -429,3 +429,46 @@ int socket_init(void)
 #endif
     return 0;
 }
+
+#ifndef CONFIG_IOVEC
+/* helper function for iov_send_recv() */
+static ssize_t
+readv_writev(int fd, const struct iovec *iov, int iov_cnt, bool do_write)
+{
+    unsigned i = 0;
+    ssize_t ret = 0;
+    while (i < iov_cnt) {
+        ssize_t r = do_write
+            ? write(fd, iov[i].iov_base, iov[i].iov_len)
+            : read(fd, iov[i].iov_base, iov[i].iov_len);
+        if (r > 0) {
+            ret += r;
+        } else if (!r) {
+            break;
+        } else if (errno == EINTR) {
+            continue;
+        } else {
+            /* else it is some "other" error,
+             * only return if there was no data processed. */
+            if (ret == 0) {
+                ret = -1;
+            }
+            break;
+        }
+        i++;
+    }
+    return ret;
+}
+
+ssize_t
+readv(int fd, const struct iovec *iov, int iov_cnt)
+{
+    return readv_writev(fd, iov, iov_cnt, false);
+}
+
+ssize_t
+writev(int fd, const struct iovec *iov, int iov_cnt)
+{
+    return readv_writev(fd, iov, iov_cnt, true);
+}
+#endif