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);
 }