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-rw-r--r--arch/um/kernel/syscall.c174
1 files changed, 152 insertions, 22 deletions
diff --git a/arch/um/kernel/syscall.c b/arch/um/kernel/syscall.c
index 1731d90e6850..48cf88dd02d4 100644
--- a/arch/um/kernel/syscall.c
+++ b/arch/um/kernel/syscall.c
@@ -1,36 +1,166 @@
/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
* Licensed under the GPL
*/
+#include "linux/sched.h"
+#include "linux/file.h"
+#include "linux/smp_lock.h"
+#include "linux/mm.h"
+#include "linux/utsname.h"
+#include "linux/msg.h"
+#include "linux/shm.h"
+#include "linux/sys.h"
+#include "linux/syscalls.h"
+#include "linux/unistd.h"
+#include "linux/slab.h"
+#include "linux/utime.h"
+#include "asm/mman.h"
+#include "asm/uaccess.h"
#include "kern_util.h"
-#include "syscall.h"
-#include "os.h"
+#include "user_util.h"
+#include "sysdep/syscalls.h"
+#include "mode_kern.h"
+#include "choose-mode.h"
-struct {
- int syscall;
- int pid;
- long result;
- unsigned long long start;
- unsigned long long end;
-} syscall_record[1024];
+/* Unlocked, I don't care if this is a bit off */
+int nsyscalls = 0;
-int record_syscall_start(int syscall)
+long sys_fork(void)
{
- int max, index;
+ long ret;
- max = sizeof(syscall_record)/sizeof(syscall_record[0]);
- index = next_syscall_index(max);
+ current->thread.forking = 1;
+ ret = do_fork(SIGCHLD, UPT_SP(&current->thread.regs.regs),
+ &current->thread.regs, 0, NULL, NULL);
+ current->thread.forking = 0;
+ return(ret);
+}
+
+long sys_vfork(void)
+{
+ long ret;
+
+ current->thread.forking = 1;
+ ret = do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD,
+ UPT_SP(&current->thread.regs.regs),
+ &current->thread.regs, 0, NULL, NULL);
+ current->thread.forking = 0;
+ return(ret);
+}
+
+/* common code for old and new mmaps */
+long sys_mmap2(unsigned long addr, unsigned long len,
+ unsigned long prot, unsigned long flags,
+ unsigned long fd, unsigned long pgoff)
+{
+ long error = -EBADF;
+ struct file * file = NULL;
+
+ flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+ if (!(flags & MAP_ANONYMOUS)) {
+ file = fget(fd);
+ if (!file)
+ goto out;
+ }
+
+ down_write(&current->mm->mmap_sem);
+ error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
+ up_write(&current->mm->mmap_sem);
+
+ if (file)
+ fput(file);
+ out:
+ return error;
+}
+
+long old_mmap(unsigned long addr, unsigned long len,
+ unsigned long prot, unsigned long flags,
+ unsigned long fd, unsigned long offset)
+{
+ long err = -EINVAL;
+ if (offset & ~PAGE_MASK)
+ goto out;
+
+ err = sys_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
+ out:
+ return err;
+}
+/*
+ * sys_pipe() is the normal C calling standard for creating
+ * a pipe. It's not the way unix traditionally does this, though.
+ */
+long sys_pipe(unsigned long __user * fildes)
+{
+ int fd[2];
+ long error;
+
+ error = do_pipe(fd);
+ if (!error) {
+ if (copy_to_user(fildes, fd, sizeof(fd)))
+ error = -EFAULT;
+ }
+ return error;
+}
- syscall_record[index].syscall = syscall;
- syscall_record[index].pid = current_pid();
- syscall_record[index].result = 0xdeadbeef;
- syscall_record[index].start = os_nsecs();
- return(index);
+
+long sys_uname(struct old_utsname __user * name)
+{
+ long err;
+ if (!name)
+ return -EFAULT;
+ down_read(&uts_sem);
+ err = copy_to_user(name, &system_utsname, sizeof (*name));
+ up_read(&uts_sem);
+ return err?-EFAULT:0;
}
-void record_syscall_end(int index, long result)
+long sys_olduname(struct oldold_utsname __user * name)
{
- syscall_record[index].result = result;
- syscall_record[index].end = os_nsecs();
+ long error;
+
+ if (!name)
+ return -EFAULT;
+ if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
+ return -EFAULT;
+
+ down_read(&uts_sem);
+
+ error = __copy_to_user(&name->sysname,&system_utsname.sysname,
+ __OLD_UTS_LEN);
+ error |= __put_user(0,name->sysname+__OLD_UTS_LEN);
+ error |= __copy_to_user(&name->nodename,&system_utsname.nodename,
+ __OLD_UTS_LEN);
+ error |= __put_user(0,name->nodename+__OLD_UTS_LEN);
+ error |= __copy_to_user(&name->release,&system_utsname.release,
+ __OLD_UTS_LEN);
+ error |= __put_user(0,name->release+__OLD_UTS_LEN);
+ error |= __copy_to_user(&name->version,&system_utsname.version,
+ __OLD_UTS_LEN);
+ error |= __put_user(0,name->version+__OLD_UTS_LEN);
+ error |= __copy_to_user(&name->machine,&system_utsname.machine,
+ __OLD_UTS_LEN);
+ error |= __put_user(0,name->machine+__OLD_UTS_LEN);
+
+ up_read(&uts_sem);
+
+ error = error ? -EFAULT : 0;
+
+ return error;
+}
+
+DEFINE_SPINLOCK(syscall_lock);
+
+static int syscall_index = 0;
+
+int next_syscall_index(int limit)
+{
+ int ret;
+
+ spin_lock(&syscall_lock);
+ ret = syscall_index;
+ if(++syscall_index == limit)
+ syscall_index = 0;
+ spin_unlock(&syscall_lock);
+ return(ret);
}