Import of Linux/MIPS 2.1.14

1 files changed, 237 insertions, 0 deletions

diff --git a/arch/sparc/kernel/sys_sparc.c b/arch/sparc/kernel/sys_sparc.c
new file mode 100644
index 000000000..14926b1d3
--- /dev/null
+++ b/arch/sparc/kernel/sys_sparc.c
@@ -0,0 +1,237 @@
+/* $Id: sys_sparc.c,v 1.25 1996/11/03 20:58:07 davem Exp $
+ * linux/arch/sparc/kernel/sys_sparc.c
+ *
+ * This file contains various random system calls that
+ * have a non-standard calling sequence on the Linux/sparc
+ * platform.
+ */
+
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/shm.h>
+#include <linux/stat.h>
+#include <linux/mman.h>
+
+#include <asm/uaccess.h>
+
+/* XXX Make this per-binary type, this way we can detect the type of
+ * XXX a binary.  Every Sparc executable calls this very early on.
+ */
+asmlinkage unsigned long sys_getpagesize(void)
+{
+	return PAGE_SIZE; /* Possibly older binaries want 8192 on sun4's? */
+}
+
+extern asmlinkage unsigned long sys_brk(unsigned long brk);
+
+asmlinkage unsigned long sparc_brk(unsigned long brk)
+{
+	if(sparc_cpu_model == sun4c) {
+		if(brk >= 0x20000000 && brk < 0xe0000000)
+			return current->mm->brk;
+	}
+	return sys_brk(brk);
+}
+
+/*
+ * sys_pipe() is the normal C calling standard for creating
+ * a pipe. It's not the way unix traditionally does this, though.
+ */
+asmlinkage int sparc_pipe(struct pt_regs *regs)
+{
+	int fd[2];
+	int error;
+
+	error = do_pipe(fd);
+	if (error) {
+		return error;
+	} else {
+		regs->u_regs[UREG_I1] = fd[1];
+		return fd[0];
+	}
+}
+
+/*
+ * sys_ipc() is the de-multiplexer for the SysV IPC calls..
+ *
+ * This is really horribly ugly.
+ */
+
+struct ipc_kludge {
+    struct msgbuf *msgp;
+    long msgtyp;
+};
+
+#define SEMOP	 	1
+#define SEMGET 		2
+#define SEMCTL 		3
+#define MSGSND 		11
+#define MSGRCV 		12
+#define MSGGET 		13
+#define MSGCTL 		14
+#define SHMAT 		21
+#define SHMDT 		22
+#define SHMGET 		23
+#define SHMCTL 		24
+
+asmlinkage int sys_ipc (uint call, int first, int second, int third, void *ptr, long fifth)
+{
+	int version;
+
+	version = call >> 16; /* hack for backward compatibility */
+	call &= 0xffff;
+
+	if (call <= SEMCTL)
+		switch (call) {
+		case SEMOP:
+			return sys_semop (first, (struct sembuf *)ptr, second);
+		case SEMGET:
+			return sys_semget (first, second, third);
+		case SEMCTL: {
+			union semun fourth;
+			if (!ptr)
+				return -EINVAL;
+			if(get_user(fourth.__pad, (void **)ptr))
+				return -EFAULT;
+			return sys_semctl (first, second, third, fourth);
+			}
+		default:
+			return -EINVAL;
+		}
+	if (call <= MSGCTL) 
+		switch (call) {
+		case MSGSND:
+			return sys_msgsnd (first, (struct msgbuf *) ptr, 
+					   second, third);
+		case MSGRCV:
+			switch (version) {
+			case 0: {
+				struct ipc_kludge tmp;
+				if (!ptr)
+					return -EINVAL;
+				if(copy_from_user(&tmp,(struct ipc_kludge *) ptr, sizeof (tmp)))
+					return -EFAULT;
+				return sys_msgrcv (first, tmp.msgp, second, tmp.msgtyp, third);
+				}
+			case 1: default:
+				return sys_msgrcv (first, (struct msgbuf *) ptr, second, fifth, third);
+			}
+		case MSGGET:
+			return sys_msgget ((key_t) first, second);
+		case MSGCTL:
+			return sys_msgctl (first, second, (struct msqid_ds *) ptr);
+		default:
+			return -EINVAL;
+		}
+	if (call <= SHMCTL) 
+		switch (call) {
+		case SHMAT:
+			switch (version) {
+			case 0: default: {
+				ulong raddr;
+				int err;
+
+				err = sys_shmat (first, (char *) ptr, second, &raddr);
+				if (err)
+					return err;
+				if(put_user (raddr, (ulong *) third))
+					return -EFAULT;
+				return 0;
+				}
+			case 1:	/* iBCS2 emulator entry point */
+				return sys_shmat (first, (char *) ptr, second, (ulong *) third);
+			}
+		case SHMDT: 
+			return sys_shmdt ((char *)ptr);
+		case SHMGET:
+			return sys_shmget (first, second, third);
+		case SHMCTL:
+			return sys_shmctl (first, second, (struct shmid_ds *) ptr);
+		default:
+			return -EINVAL;
+		}
+	return -EINVAL;
+}
+
+extern unsigned long get_unmapped_area(unsigned long addr, unsigned long len);
+
+/* Linux version of mmap */
+asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
+	unsigned long prot, unsigned long flags, unsigned long fd,
+	unsigned long off)
+{
+	struct file * file = NULL;
+	long retval;
+
+	if (!(flags & MAP_ANONYMOUS)) {
+		if (fd >= NR_OPEN || !(file = current->files->fd[fd])){
+			return -EBADF;
+	    }
+	}
+	if(!(flags & MAP_FIXED) && !addr) {
+		addr = get_unmapped_area(addr, len);
+		if(!addr){
+			return -ENOMEM;
+		}
+	}
+	retval = do_mmap(file, addr, len, prot, flags, off);
+	return retval;
+}
+
+extern int do_open_namei(const char * pathname, int flag, int mode,
+               struct inode ** res_inode, struct inode * base);
+
+#define BSD_EMUL "/usr/gnemul/sunos"
+#define SOL_EMUL "/usr/gnemul/solaris"
+
+int
+open_namei(const char * pathname, int flag, int mode,
+               struct inode ** res_inode, struct inode * base)
+{
+	if (!base && (current->personality & (PER_BSD|PER_SVR4)) && *pathname == '/'){
+		struct inode *emul_ino;
+		const char   *p = pathname;
+		char *emul_path = current->personality & PER_BSD ? BSD_EMUL : SOL_EMUL;
+		int v;
+
+		while (*p == '/')
+			p++;
+		
+		if (do_open_namei (emul_path, flag, mode, &emul_ino, NULL) >= 0 && emul_ino){
+			v = do_open_namei (p, flag, mode, res_inode, emul_ino);
+			if (v >= 0)
+				return v;
+		}
+	}
+	return do_open_namei (pathname, flag, mode, res_inode, base);
+}
+
+
+/* we come to here via sys_nis_syscall so it can setup the regs argument */
+asmlinkage unsigned long
+c_sys_nis_syscall (struct pt_regs *regs)
+{
+	printk ("Unimplemented SPARC system call %d\n",(int)regs->u_regs[1]);
+	show_regs (regs);
+	return -ENOSYS;
+}
+
+/* #define DEBUG_SPARC_BREAKPOINT */
+
+asmlinkage void
+sparc_breakpoint (struct pt_regs *regs)
+{
+#ifdef DEBUG_SPARC_BREAKPOINT
+        printk ("TRAP: Entering kernel PC=%x, nPC=%x\n", regs->pc, regs->npc);
+#endif
+	force_sig(SIGTRAP, current);
+#ifdef DEBUG_SPARC_BREAKPOINT
+	printk ("TRAP: Returning to space: PC=%x nPC=%x\n", regs->pc, regs->npc);
+#endif
+}
+