score: add old syscall support

3 files changed, 40 insertions, 2 deletions

diff --git a/arch/score/include/asm/unistd.h b/arch/score/include/asm/unistd.h
index 0d98b72f462a..4aa957364d4d 100644
--- a/arch/score/include/asm/unistd.h
+++ b/arch/score/include/asm/unistd.h
@@ -3,6 +3,11 @@
 
 #define __ARCH_HAVE_MMU
 
+#define __ARCH_WANT_SYSCALL_NO_AT
+#define __ARCH_WANT_SYSCALL_NO_FLAGS
+#define __ARCH_WANT_SYSCALL_OFF_T
+#define __ARCH_WANT_SYSCALL_DEPRECATED
+
 #include <asm-generic/unistd.h>
 
 #endif /* _ASM_SCORE_UNISTD_H */
diff --git a/arch/score/kernel/entry.S b/arch/score/kernel/entry.S
index 10e859ddefd1..577abba3fac6 100644
--- a/arch/score/kernel/entry.S
+++ b/arch/score/kernel/entry.S
@@ -499,3 +499,16 @@ ENTRY(sys_sigaltstack)
         mv      r4, r0
         la      r8, score_sigaltstack
         br      r8
+
+#ifdef __ARCH_WANT_SYSCALL_DEPRECATED
+ENTRY(sys_fork)
+        mv      r4, r0
+        la      r8, score_fork
+        br      r8
+
+ENTRY(sys_vfork)
+        mv      r4, r0
+        la      r8, score_vfork
+        br      r8
+#endif /* __ARCH_WANT_SYSCALL_DEPRECATED */
+
diff --git a/arch/score/kernel/sys_score.c b/arch/score/kernel/sys_score.c
index 61aff8a93443..001249469866 100644
--- a/arch/score/kernel/sys_score.c
+++ b/arch/score/kernel/sys_score.c
@@ -25,6 +25,7 @@
 
 #include <linux/file.h>
 #include <linux/fs.h>
+#include <linux/mm.h>
 #include <linux/mman.h>
 #include <linux/module.h>
 #include <linux/unistd.h>
@@ -49,8 +50,7 @@ sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
         }
 
         down_write(&current->mm->mmap_sem);
-        error = do_mmap_pgoff(file, addr, len, prot, flags,
-                        pgoff >> (PAGE_SHIFT - 12));
+        error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
         up_write(&current->mm->mmap_sem);
 
         if (file)
@@ -59,6 +59,19 @@ sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
         return error;
 }
 
+asmlinkage long
+sys_mmap(unsigned long addr, unsigned long len, unsigned long prot,
+        unsigned long flags, unsigned long fd, off_t pgoff)
+{
+        return sys_mmap2(addr, len, prot, flags, fd, pgoff >> PAGE_SHIFT);
+}
+
+asmlinkage long
+score_fork(struct pt_regs *regs)
+{
+        return do_fork(SIGCHLD, regs->regs[0], regs, 0, NULL, NULL);
+}
+
 /*
  * Clone a task - this clones the calling program thread.
  * This is called indirectly via a small wrapper
@@ -81,6 +94,13 @@ score_clone(struct pt_regs *regs)
                         parent_tidptr, child_tidptr);
 }
 
+asmlinkage long
+score_vfork(struct pt_regs *regs)
+{
+        return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD,
+                        regs->regs[0], regs, 0, NULL, NULL);
+}
+
 /*
  * sys_execve() executes a new program.
  * This is called indirectly via a small wrapper