X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fsparc%2Fkernel%2Fsys_sparc.c;h=a954a0c000002410e518e05f9ba905e8f53ff31a;hb=refs%2Fheads%2Fvserver;hp=07879079a53e6d3facdb489efa41b33071587d8f;hpb=9bf4aaab3e101692164d49b7ca357651eb691cb6;p=linux-2.6.git

diff --git a/arch/sparc/kernel/sys_sparc.c b/arch/sparc/kernel/sys_sparc.c
index 07879079a..a954a0c00 100644
--- a/arch/sparc/kernel/sys_sparc.c
+++ b/arch/sparc/kernel/sys_sparc.c
@@ -21,10 +21,10 @@
 #include <linux/utsname.h>
 #include <linux/smp.h>
 #include <linux/smp_lock.h>
-#include <linux/vs_cvirt.h>
 
 #include <asm/uaccess.h>
 #include <asm/ipc.h>
+#include <asm/unistd.h>
 
 /* #define DEBUG_UNIMP_SYSCALL */
 
@@ -198,8 +198,7 @@ asmlinkage int sys_ipc (uint call, int first, int second, int third, void __user
 				goto out;
 				}
 			case 1:	/* iBCS2 emulator entry point */
-				err = do_shmat (first, (char __user *) ptr,
-						second, (ulong *) third);
+				err = -EINVAL;
 				goto out;
 			}
 		case SHMDT: 
@@ -221,6 +220,21 @@ out:
 	return err;
 }
 
+int sparc_mmap_check(unsigned long addr, unsigned long len, unsigned long flags)
+{
+	if (ARCH_SUN4C_SUN4 &&
+	    (len > 0x20000000 ||
+	     ((flags & MAP_FIXED) &&
+	      addr < 0xe0000000 && addr + len > 0x20000000)))
+		return -EINVAL;
+
+	/* See asm-sparc/uaccess.h */
+	if (len > TASK_SIZE - PAGE_SIZE || addr + len > TASK_SIZE - PAGE_SIZE)
+		return -EINVAL;
+
+	return 0;
+}
+
 /* Linux version of mmap */
 static unsigned long do_mmap2(unsigned long addr, unsigned long len,
 	unsigned long prot, unsigned long flags, unsigned long fd,
@@ -235,25 +249,13 @@ static unsigned long do_mmap2(unsigned long addr, unsigned long len,
 			goto out;
 	}
 
-	retval = -EINVAL;
 	len = PAGE_ALIGN(len);
-	if (ARCH_SUN4C_SUN4 &&
-	    (len > 0x20000000 ||
-	     ((flags & MAP_FIXED) &&
-	      addr < 0xe0000000 && addr + len > 0x20000000)))
-		goto out_putf;
-
-	/* See asm-sparc/uaccess.h */
-	if (len > TASK_SIZE - PAGE_SIZE || addr + len > TASK_SIZE - PAGE_SIZE)
-		goto out_putf;
-
 	flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
 
 	down_write(&current->mm->mmap_sem);
 	retval = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
 	up_write(&current->mm->mmap_sem);
 
-out_putf:
 	if (file)
 		fput(file);
 out:
@@ -401,7 +403,7 @@ sparc_sigaction (int sig, const struct old_sigaction __user *act,
 	if (act) {
 		unsigned long mask;
 
-		if (verify_area(VERIFY_READ, act, sizeof(*act)) ||
+		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
 		    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
 		    __get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
 			return -EFAULT;
@@ -419,7 +421,7 @@ sparc_sigaction (int sig, const struct old_sigaction __user *act,
 		 * deadlock us if we held the signal lock on SMP.  So for
 		 * now I take the easy way out and do no locking.
 		 */
-		if (verify_area(VERIFY_WRITE, oact, sizeof(*oact)) ||
+		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
 		    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
 		    __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
 			return -EFAULT;
@@ -467,21 +469,45 @@ sys_rt_sigaction(int sig,
 
 asmlinkage int sys_getdomainname(char __user *name, int len)
 {
- 	int nlen;
- 	int err = -EFAULT;
+ 	int nlen, err;
  	
+	if (len < 0)
+		return -EINVAL;
+
  	down_read(&uts_sem);
  	
-	nlen = strlen(vx_new_uts(domainname)) + 1;
-
-	if (nlen < len)
-		len = nlen;
-	if (len > __NEW_UTS_LEN)
-		goto done;
-	if (copy_to_user(name, vx_new_uts(domainname), len))
-		goto done;
-	err = 0;
-done:
+	nlen = strlen(utsname()->domainname) + 1;
+	err = -EINVAL;
+	if (nlen > len)
+		goto out;
+
+	err = -EFAULT;
+	if (!copy_to_user(name, utsname()->domainname, nlen))
+		err = 0;
+
+out:
 	up_read(&uts_sem);
 	return err;
 }
+
+/*
+ * Do a system call from kernel instead of calling sys_execve so we
+ * end up with proper pt_regs.
+ */
+int kernel_execve(const char *filename, char *const argv[], char *const envp[])
+{
+	long __res;
+	register long __g1 __asm__ ("g1") = __NR_execve;
+	register long __o0 __asm__ ("o0") = (long)(filename);
+	register long __o1 __asm__ ("o1") = (long)(argv);
+	register long __o2 __asm__ ("o2") = (long)(envp);
+	asm volatile ("t 0x10\n\t"
+		      "bcc 1f\n\t"
+		      "mov %%o0, %0\n\t"
+		      "sub %%g0, %%o0, %0\n\t"
+		      "1:\n\t"
+		      : "=r" (__res), "=&r" (__o0)
+		      : "1" (__o0), "r" (__o1), "r" (__o2), "r" (__g1)
+		      : "cc");
+	return __res;
+}