2011-04-07 Yao Qi <yao@codesourcery.com>

	* arm-linux-tdep.c (arm_linux_copy_svc): Remove parameters INSN
	and TO.
	* arm-tdep.c (cleanup_svc): Handle variable instruction size.
	(arm_copy_svc): Remove parameters INSN and TO.
	(decode_svc_copro): Update caller.
	* arm-tdep.h (struct displaced_step_closure): Remove parameters
	from function pointer `copy_svc_os'.

4 files changed, 25 insertions, 17 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 42b8b93..f6050a9 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,15 @@
 2011-04-07  Yao Qi  <yao@codesourcery.com>
 
+	* arm-linux-tdep.c (arm_linux_copy_svc): Remove parameters INSN
+	and TO.
+	* arm-tdep.c (cleanup_svc): Handle variable instruction size.
+	(arm_copy_svc): Remove parameters INSN and TO.
+	(decode_svc_copro): Update caller.
+	* arm-tdep.h (struct displaced_step_closure): Remove parameters
+	from function pointer `copy_svc_os'.
+
+2011-04-07  Yao Qi  <yao@codesourcery.com>
+
 	* arm-tdep.c (cleanup_branch): Set a correct return address in
 	LR for ARM and Thumb.
 
diff --git a/gdb/arm-linux-tdep.c b/gdb/arm-linux-tdep.c
index 9db125e..b7ff5ec 100644
--- a/gdb/arm-linux-tdep.c
+++ b/gdb/arm-linux-tdep.c
@@ -795,8 +795,8 @@ arm_linux_cleanup_svc (struct gdbarch *gdbarch,
 }
 
 static int
-arm_linux_copy_svc (struct gdbarch *gdbarch, uint32_t insn, CORE_ADDR to,
-		    struct regcache *regs, struct displaced_step_closure *dsc)
+arm_linux_copy_svc (struct gdbarch *gdbarch, struct regcache *regs,
+		    struct displaced_step_closure *dsc)
 {
   CORE_ADDR return_to = 0;
 
@@ -805,10 +805,6 @@ arm_linux_copy_svc (struct gdbarch *gdbarch, uint32_t insn, CORE_ADDR to,
   int is_sigreturn = 0;
   int is_thumb;
 
-  if (debug_displaced)
-    fprintf_unfiltered (gdb_stdlog, "displaced: copying Linux svc insn %.8lx\n",
-			(unsigned long) insn);
-
   frame = get_current_frame ();
 
   is_sigreturn = arm_linux_sigreturn_return_addr(frame, svc_number,
@@ -862,7 +858,6 @@ arm_linux_copy_svc (struct gdbarch *gdbarch, uint32_t insn, CORE_ADDR to,
      Cleanup: if pc lands in scratch space, pc <- insn_addr + 4
               else leave pc alone.  */
 
-  dsc->modinsn[0] = insn;
 
   dsc->cleanup = &arm_linux_cleanup_svc;
   /* Pretend we wrote to the PC, so cleanup doesn't set PC to the next
diff --git a/gdb/arm-tdep.c b/gdb/arm-tdep.c
index 024191b..f33dc10 100644
--- a/gdb/arm-tdep.c
+++ b/gdb/arm-tdep.c
@@ -6358,7 +6358,7 @@ static void
 cleanup_svc (struct gdbarch *gdbarch, struct regcache *regs,
 	     struct displaced_step_closure *dsc)
 {
-  CORE_ADDR resume_addr = dsc->insn_addr + 4;
+  CORE_ADDR resume_addr = dsc->insn_addr + dsc->insn_size;
 
   if (debug_displaced)
     fprintf_unfiltered (gdb_stdlog, "displaced: cleanup for svc, resume at "
@@ -6368,12 +6368,9 @@ cleanup_svc (struct gdbarch *gdbarch, struct regcache *regs,
 }
 
 static int
-copy_svc (struct gdbarch *gdbarch, uint32_t insn, CORE_ADDR to,
+copy_svc (struct gdbarch *gdbarch, uint32_t insn,
 	  struct regcache *regs, struct displaced_step_closure *dsc)
 {
-  /* Allow OS-specific code to override SVC handling.  */
-  if (dsc->u.svc.copy_svc_os)
-    return dsc->u.svc.copy_svc_os (gdbarch, insn, to, regs, dsc);
 
   if (debug_displaced)
     fprintf_unfiltered (gdb_stdlog, "displaced: copying svc insn %.8lx\n",
@@ -6385,12 +6382,19 @@ copy_svc (struct gdbarch *gdbarch, uint32_t insn, CORE_ADDR to,
 
   dsc->modinsn[0] = insn;
 
-  dsc->cleanup = &cleanup_svc;
   /* Pretend we wrote to the PC, so cleanup doesn't set PC to the next
      instruction.  */
   dsc->wrote_to_pc = 1;
 
-  return 0;
+  /* Allow OS-specific code to override SVC handling.  */
+  if (dsc->u.svc.copy_svc_os)
+    return dsc->u.svc.copy_svc_os (gdbarch, regs, dsc);
+  else
+    {
+      dsc->cleanup = &cleanup_svc;
+      return 0;
+    }
+
 }
 
 /* Copy undefined instructions.  */
@@ -6843,7 +6847,7 @@ decode_svc_copro (struct gdbarch *gdbarch, uint32_t insn, CORE_ADDR to,
   else if ((op1 & 0x31) == 0x21 && op && (coproc & 0xe) != 0xa)
     return copy_unmodified (gdbarch, insn, "mrc/mrc2", dsc);
   else if ((op1 & 0x30) == 0x30)
-    return copy_svc (gdbarch, insn, to, regs, dsc);
+    return copy_svc (gdbarch, insn, regs, dsc);
   else
     return copy_undef (gdbarch, insn, dsc);  /* Possibly unreachable.  */
 }
diff --git a/gdb/arm-tdep.h b/gdb/arm-tdep.h
index f047351..fe27c7f 100644
--- a/gdb/arm-tdep.h
+++ b/gdb/arm-tdep.h
@@ -258,8 +258,7 @@ struct displaced_step_closure
     {
       /* If non-NULL, override generic SVC handling (e.g. for a particular
          OS).  */
-      int (*copy_svc_os) (struct gdbarch *gdbarch, uint32_t insn, CORE_ADDR to,
-			  struct regcache *regs,
+      int (*copy_svc_os) (struct gdbarch *gdbarch, struct regcache *regs,
 			  struct displaced_step_closure *dsc);
     } svc;
   } u;