sh: gcc4 support.

This fixes up the kernel for gcc4. The existing exception handlers
needed some wrapping for pt_regs access, acessing the registers
via a RELOC_HIDE() pointer.

The strcpy() issues popped up here too, so add -ffreestanding and
kill off the symbol export.

Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 18 insertions, 14 deletions

diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c
index a52b13ac6b7f..f3e2631be144 100644
--- a/arch/sh/kernel/process.c
+++ b/arch/sh/kernel/process.c
@@ -385,10 +385,11 @@ struct task_struct *__switch_to(struct task_struct *prev, struct task_struct *ne
 
 asmlinkage int sys_fork(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);
 #ifdef CONFIG_MMU
-        return do_fork(SIGCHLD, regs.regs[15], &regs, 0, NULL, NULL);
+        return do_fork(SIGCHLD, regs->regs[15], regs, 0, NULL, NULL);
 #else
         /* fork almost works, enough to trick you into looking elsewhere :-( */
         return -EINVAL;
@@ -398,11 +399,12 @@ asmlinkage int sys_fork(unsigned long r4, unsigned long r5,
 asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
                          unsigned long parent_tidptr,
                          unsigned long child_tidptr,
-                         struct pt_regs regs)
+                         struct pt_regs __regs)
 {
+        struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
         if (!newsp)
-                newsp = regs.regs[15];
-        return do_fork(clone_flags, newsp, &regs, 0,
+                newsp = regs->regs[15];
+        return do_fork(clone_flags, newsp, regs, 0,
                         (int __user *)parent_tidptr, (int __user *)child_tidptr);
 }
 
@@ -418,9 +420,10 @@ asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
  */
 asmlinkage int sys_vfork(unsigned long r4, unsigned long r5,
                          unsigned long r6, unsigned long r7,
-                         struct pt_regs regs)
+                         struct pt_regs __regs)
 {
-        return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs.regs[15], &regs,
+        struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
+        return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->regs[15], regs,
                        0, NULL, NULL);
 }
 
@@ -429,8 +432,9 @@ asmlinkage int sys_vfork(unsigned long r4, unsigned long r5,
  */
 asmlinkage int sys_execve(char *ufilename, char **uargv,
                           char **uenvp, unsigned long r7,
-                          struct pt_regs regs)
+                          struct pt_regs __regs)
 {
+        struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
         int error;
         char *filename;
 
@@ -442,7 +446,7 @@ asmlinkage int sys_execve(char *ufilename, char **uargv,
         error = do_execve(filename,
                           (char __user * __user *)uargv,
                           (char __user * __user *)uenvp,
-                          &regs);
+                          regs);
         if (error == 0) {
                 task_lock(current);
                 current->ptrace &= ~PT_DTRACE;
@@ -472,9 +476,7 @@ unsigned long get_wchan(struct task_struct *p)
         return pc;
 }
 
-asmlinkage void break_point_trap(unsigned long r4, unsigned long r5,
-                                 unsigned long r6, unsigned long r7,
-                                 struct pt_regs regs)
+asmlinkage void break_point_trap(void)
 {
         /* Clear tracing.  */
 #if defined(CONFIG_CPU_SH4A)
@@ -492,8 +494,10 @@ asmlinkage void break_point_trap(unsigned long r4, unsigned long r5,
 
 asmlinkage void break_point_trap_software(unsigned long r4, unsigned long r5,
                                           unsigned long r6, unsigned long r7,
-                                          struct pt_regs regs)
+                                          struct pt_regs __regs)
 {
-        regs.pc -= 2;
+        struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
+
+        regs->pc -= 2;
         force_sig(SIGTRAP, current);
 }