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, 28 insertions, 24 deletions

diff --git a/arch/sh/kernel/traps.c b/arch/sh/kernel/traps.c
index f558748d7543..b52037bc1255 100644
--- a/arch/sh/kernel/traps.c
+++ b/arch/sh/kernel/traps.c
@@ -23,8 +23,8 @@
 
 #ifdef CONFIG_SH_KGDB
 #include <asm/kgdb.h>
-#define CHK_REMOTE_DEBUG(regs)                  \
-{                                               \
+#define CHK_REMOTE_DEBUG(regs)                  \
+{                                               \
         if (kgdb_debug_hook && !user_mode(regs))\
                 (*kgdb_debug_hook)(regs);       \
 }
@@ -501,7 +501,7 @@ static int handle_unaligned_access(u16 instruction, struct pt_regs *regs)
 /*
  * Handle various address error exceptions
  */
-asmlinkage void do_address_error(struct pt_regs *regs, 
+asmlinkage void do_address_error(struct pt_regs *regs,
                                  unsigned long writeaccess,
                                  unsigned long address)
 {
@@ -588,7 +588,7 @@ int is_dsp_inst(struct pt_regs *regs)
 {
         unsigned short inst;
 
-        /* 
+        /*
          * Safe guard if DSP mode is already enabled or we're lacking
          * the DSP altogether.
          */
@@ -612,8 +612,9 @@ int is_dsp_inst(struct pt_regs *regs)
 #ifdef CONFIG_CPU_SH2A
 asmlinkage void do_divide_error(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);
         siginfo_t info;
 
         current->thread.trap_no = r4;
@@ -635,12 +636,13 @@ asmlinkage void do_divide_error(unsigned long r4, unsigned long r5,
 /* arch/sh/kernel/cpu/sh4/fpu.c */
 extern int do_fpu_inst(unsigned short, struct pt_regs *);
 extern asmlinkage void do_fpu_state_restore(unsigned long r4, unsigned long r5,
-                unsigned long r6, unsigned long r7, struct pt_regs regs);
+                unsigned long r6, unsigned long r7, struct pt_regs __regs);
 
 asmlinkage void do_reserved_inst(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);
         unsigned long error_code;
         struct task_struct *tsk = current;
 
@@ -648,11 +650,11 @@ asmlinkage void do_reserved_inst(unsigned long r4, unsigned long r5,
         unsigned short inst = 0;
         int err;
 
-        get_user(inst, (unsigned short*)regs.pc);
+        get_user(inst, (unsigned short*)regs->pc);
 
-        err = do_fpu_inst(inst, &regs);
+        err = do_fpu_inst(inst, regs);
         if (!err) {
-                regs.pc += 2;
+                regs->pc += 2;
                 return;
         }
         /* not a FPU inst. */
@@ -660,9 +662,9 @@ asmlinkage void do_reserved_inst(unsigned long r4, unsigned long r5,
 
 #ifdef CONFIG_SH_DSP
         /* Check if it's a DSP instruction */
-        if (is_dsp_inst(&regs)) {
+        if (is_dsp_inst(regs)) {
                 /* Enable DSP mode, and restart instruction. */
-                regs.sr |= SR_DSP;
+                regs->sr |= SR_DSP;
                 return;
         }
 #endif
@@ -672,9 +674,9 @@ asmlinkage void do_reserved_inst(unsigned long r4, unsigned long r5,
         local_irq_enable();
         tsk->thread.error_code = error_code;
         tsk->thread.trap_no = TRAP_RESERVED_INST;
-        CHK_REMOTE_DEBUG(&regs);
+        CHK_REMOTE_DEBUG(regs);
         force_sig(SIGILL, tsk);
-        die_if_no_fixup("reserved instruction", &regs, error_code);
+        die_if_no_fixup("reserved instruction", regs, error_code);
 }
 
 #ifdef CONFIG_SH_FPU_EMU
@@ -722,17 +724,18 @@ static int emulate_branch(unsigned short inst, struct pt_regs* regs)
 
 asmlinkage void do_illegal_slot_inst(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);
         unsigned long error_code;
         struct task_struct *tsk = current;
 #ifdef CONFIG_SH_FPU_EMU
         unsigned short inst = 0;
 
-        get_user(inst, (unsigned short *)regs.pc + 1);
-        if (!do_fpu_inst(inst, &regs)) {
-                get_user(inst, (unsigned short *)regs.pc);
-                if (!emulate_branch(inst, &regs))
+        get_user(inst, (unsigned short *)regs->pc + 1);
+        if (!do_fpu_inst(inst, regs)) {
+                get_user(inst, (unsigned short *)regs->pc);
+                if (!emulate_branch(inst, regs))
                         return;
                 /* fault in branch.*/
         }
@@ -744,19 +747,20 @@ asmlinkage void do_illegal_slot_inst(unsigned long r4, unsigned long r5,
         local_irq_enable();
         tsk->thread.error_code = error_code;
         tsk->thread.trap_no = TRAP_RESERVED_INST;
-        CHK_REMOTE_DEBUG(&regs);
+        CHK_REMOTE_DEBUG(regs);
         force_sig(SIGILL, tsk);
-        die_if_no_fixup("illegal slot instruction", &regs, error_code);
+        die_if_no_fixup("illegal slot instruction", regs, error_code);
 }
 
 asmlinkage void do_exception_error(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);
         long ex;
 
         lookup_exception_vector(ex);
-        die_if_kernel("exception", &regs, ex);
+        die_if_kernel("exception", regs, ex);
 }
 
 #if defined(CONFIG_SH_STANDARD_BIOS)
@@ -809,7 +813,7 @@ void *set_exception_table_vec(unsigned int vec, void *handler)
 
 extern asmlinkage void address_error_handler(unsigned long r4, unsigned long r5,
                                              unsigned long r6, unsigned long r7,
-                                             struct pt_regs regs);
+                                             struct pt_regs __regs);
 
 void __init trap_init(void)
 {