Changeset 11fa83a in mainline

Timestamp:

2006-04-26T16:43:44Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

07b3d93f

Parents:

3214a20

Message:

Add userspace support for SYS_AS_AREA_ACCEPT and SYS_AS_AREA_SEND syscalls.

Location:

libc

Files:

• Makefile (modified) (1 diff)
• generic/as.c (moved) (moved from libc/generic/mmap.c ) (2 diffs)
• include/unistd.h (modified) (2 diffs)

libc/Makefile

@@ -45 +45 @@
         generic/libc.c \
         generic/ddi.c \
-        generic/mmap.c \
+        generic/as.c \
         generic/string.c \
         generic/thread.c \

libc/generic/as.c

@@ -29 +29 @@
 #include <libc.h>
 #include <unistd.h>
+#include <kernel/mm/as_arg.h>
+#include <task.h>
 
 /** Create address space area.
@@ -54 +56 @@
 {
         return (void *) __SYSCALL3(SYS_AS_AREA_RESIZE, (sysarg_t ) address, (sysarg_t) size, (sysarg_t) flags);
+}
+
+/** Prepare to accept address space area.
+ *
+ * @param id Task ID of the donor task.
+ * @param base Destination address for the new address space area.
+ * @param size Size of the new address space area.
+ * @param flags Flags of the area TASK is willing to accept.
+ *
+ * @return 0 on success or a code from errno.h.
+ */
+int as_area_accept(task_id_t id, void *base, size_t size, int flags)
+{
+        as_area_acptsnd_arg_t arg;
+        
+        arg.task_id = id;
+        arg.base = base;
+        arg.size = size;
+        arg.flags = flags;
+        
+        return __SYSCALL1(SYS_AS_AREA_ACCEPT, (__native) &arg);
+}
+
+/** Send address space area to another task.
+ *
+ * @param id Task ID of the acceptor task.
+ * @param base Source address of the existing address space area.
+ *
+ * @return 0 on success or a code from errno.h.
+ */
+int as_area_send(task_id_t id, void *base)
+{
+        as_area_acptsnd_arg_t arg;
+        
+        arg.task_id = id;
+        arg.base = base;
+        arg.size = 0;
+        arg.flags = 0;
+        
+        return __SYSCALL1(SYS_AS_AREA_SEND, (__native) &arg);
 }
 

libc/include/unistd.h

@@ -32 +32 @@
 #include <types.h>
 #include <arch/mm/page.h>
+#include <task.h>
 
 #define NULL 0
@@ -38 +39 @@
 extern ssize_t write(int fd, const void * buf, size_t count);
 extern void _exit(int status);
-void *as_area_create(void *address, size_t size, int flags);
-void *as_area_resize(void *address, size_t size, int flags);
+extern void *as_area_create(void *address, size_t size, int flags);
+extern void *as_area_resize(void *address, size_t size, int flags);
+extern int as_area_accept(task_id_t id, void *base, size_t size, int flags);
+extern int as_area_send(task_id_t id, void *base);
 void *sbrk(ssize_t incr);