===================================================================
@@ -499,6 +499,8 @@
false },
{ "brk_interrupt", 0, 0, true, false, false, rl78_handle_func_attribute,
false },
+ { "naked", 0, 0, true, false, false, rl78_handle_func_attribute,
+ false },
{ NULL, 0, 0, false, false, false, NULL, false }
};
@@ -825,6 +827,12 @@
return rv;
}
+static int
+rl78_is_naked_func (void)
+{
+ return (lookup_attribute ("naked", DECL_ATTRIBUTES (current_function_decl)) != NULL_TREE);
+}
+
/* Expand the function prologue (from the prologue pattern). */
void
rl78_expand_prologue (void)
@@ -833,6 +841,9 @@
rtx sp = gen_rtx_REG (HImode, STACK_POINTER_REGNUM);
int rb = 0;
+ if (rl78_is_naked_func ())
+ return;
+
if (!cfun->machine->computed)
rl78_compute_frame_info ();
@@ -877,6 +888,9 @@
rtx sp = gen_rtx_REG (HImode, STACK_POINTER_REGNUM);
int rb = 0;
+ if (rl78_is_naked_func ())
+ return;
+
if (frame_pointer_needed)
{
emit_move_insn (gen_rtx_REG (HImode, STACK_POINTER_REGNUM),
===================================================================
@@ -3142,7 +3142,7 @@
@item naked
@cindex function without a prologue/epilogue code
-Use this attribute on the ARM, AVR, MCORE, RX and SPU ports to indicate that
+Use this attribute on the ARM, AVR, MCORE, RL78, RX and SPU ports to indicate that
the specified function does not need prologue/epilogue sequences generated by
the compiler. It is up to the programmer to provide these sequences. The
only statements that can be safely included in naked functions are
Hi DJ, OK, I am abandoning my RL78 interrupt prologue patch for now. There are just too many complications to make it work. Instead here is a much simpler patch to add support for a naked function attribute. OK to apply ? Cheers Nick gcc/ChangeLog 2013-05-16 Nick Clifton <nickc@redhat.com> * config/rl78/rl78.c (rl78_attribute_table): Add naked. (rl78_is_naked_func): New function. (rl78_expand_prologue): Skip prologue generation for naked functions. (rl78_expand_epilogue): Skip epilogue generation for naked functions. * doc/extend.texi (naked): Add RL78 to the list of processors that supports this attribute.