X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=arch%2Fsh%2Fkernel%2Fsys_sh.c;h=e18f183e1035b70864dac90245c60727d9e8d13c;hb=93bbad8fe13a25dcf7f3bc628a71d1a7642ae61b;hp=b68ff705f0673c56c1a6845d97569689df136932;hpb=e823aff2d6eb43083abcc75a32ddfb167c324089;p=linux-2.6-omap-h63xx.git

diff --git a/arch/sh/kernel/sys_sh.c b/arch/sh/kernel/sys_sh.c
index b68ff705f06..e18f183e103 100644
--- a/arch/sh/kernel/sys_sh.c
+++ b/arch/sh/kernel/sys_sh.c
@@ -25,6 +25,7 @@
 #include <asm/cacheflush.h>
 #include <asm/uaccess.h>
 #include <asm/ipc.h>
+#include <asm/unistd.h>
 
 /*
  * sys_pipe() is the normal C calling standard for creating
@@ -32,14 +33,15 @@
  */
 asmlinkage int sys_pipe(unsigned long r4, unsigned long r5,
 	unsigned long r6, unsigned long r7,
-	struct pt_regs regs)
+	struct pt_regs __regs)
 {
+	struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
 	int fd[2];
 	int error;
 
 	error = do_pipe(fd);
 	if (!error) {
-		regs.regs[1] = fd[1];
+		regs->regs[1] = fd[1];
 		return fd[0];
 	}
 	return error;
@@ -49,6 +51,7 @@ unsigned long shm_align_mask = PAGE_SIZE - 1;	/* Sane caches */
 
 EXPORT_SYMBOL(shm_align_mask);
 
+#ifdef CONFIG_MMU
 /*
  * To avoid cache aliases, we map the shared page with same color.
  */
@@ -134,6 +137,7 @@ full_search:
 			addr = COLOUR_ALIGN(addr, pgoff);
 	}
 }
+#endif /* CONFIG_MMU */
 
 static inline long
 do_mmap2(unsigned long addr, unsigned long len, unsigned long prot, 
@@ -281,7 +285,7 @@ asmlinkage int sys_uname(struct old_utsname * name)
 	if (!name)
 		return -EFAULT;
 	down_read(&uts_sem);
-	err=copy_to_user(name, &system_utsname, sizeof (*name));
+	err = copy_to_user(name, utsname(), sizeof (*name));
 	up_read(&uts_sem);
 	return err?-EFAULT:0;
 }
@@ -309,3 +313,25 @@ asmlinkage int sys_fadvise64_64_wrapper(int fd, u32 offset0, u32 offset1,
 				(u64)len0 << 32 | len1,	advice);
 #endif
 }
+
+#if defined(CONFIG_CPU_SH2) || defined(CONFIG_CPU_SH2A)
+#define SYSCALL_ARG3	"trapa #0x23"
+#else
+#define SYSCALL_ARG3	"trapa #0x13"
+#endif
+
+/*
+ * 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[])
+{
+	register long __sc0 __asm__ ("r3") = __NR_execve;
+	register long __sc4 __asm__ ("r4") = (long) filename;
+	register long __sc5 __asm__ ("r5") = (long) argv;
+	register long __sc6 __asm__ ("r6") = (long) envp;
+	__asm__ __volatile__ (SYSCALL_ARG3 : "=z" (__sc0)	
+			: "0" (__sc0), "r" (__sc4), "r" (__sc5), "r" (__sc6)
+			: "memory");
+	return __sc0;
+}