sh: sys_sh consolidation for arch_get_unmapped_area().

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 84 insertions, 0 deletions

diff --git a/arch/sh/kernel/sys_sh32.c b/arch/sh/kernel/sys_sh32.c
new file mode 100644
index 000000000000..125e493ead82
--- /dev/null
+++ b/arch/sh/kernel/sys_sh32.c
@@ -0,0 +1,84 @@
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/shm.h>
+#include <linux/stat.h>
+#include <linux/syscalls.h>
+#include <linux/mman.h>
+#include <linux/file.h>
+#include <linux/utsname.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/ipc.h>
+#include <asm/cacheflush.h>
+#include <asm/uaccess.h>
+#include <asm/unistd.h>
+
+/*
+ * sys_pipe() is the normal C calling standard for creating
+ * a pipe. It's not the way Unix traditionally does this, though.
+ */
+asmlinkage int sys_pipe(unsigned long r4, unsigned long r5,
+        unsigned long r6, unsigned long r7,
+        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];
+                return fd[0];
+        }
+        return error;
+}
+
+asmlinkage ssize_t sys_pread_wrapper(unsigned int fd, char * buf,
+                             size_t count, long dummy, loff_t pos)
+{
+        return sys_pread64(fd, buf, count, pos);
+}
+
+asmlinkage ssize_t sys_pwrite_wrapper(unsigned int fd, const char * buf,
+                              size_t count, long dummy, loff_t pos)
+{
+        return sys_pwrite64(fd, buf, count, pos);
+}
+
+asmlinkage int sys_fadvise64_64_wrapper(int fd, u32 offset0, u32 offset1,
+                                u32 len0, u32 len1, int advice)
+{
+#ifdef  __LITTLE_ENDIAN__
+        return sys_fadvise64_64(fd, (u64)offset1 << 32 | offset0,
+                                (u64)len1 << 32 | len0, advice);
+#else
+        return sys_fadvise64_64(fd, (u64)offset0 << 32 | 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;
+}