On Thu, Jun 14, 2001 at 10:19:51AM -0700, Richard Henderson wrote:
>
> I could have sworn there was an exception_receiver pattern on mips
> to handle this, but I don't see it now. It's relatively easy to fix;
> see TARGET_LD_BUGGY_LDGP is handled on alpha.
>
Thanks. This patch seems to fix my problem. But I have several
questions:
1. Is the usage of current_frame_info.args_size right?
2. What should be in the place of [(const_int 4)]?
3. Does it need other patterns for similar situations?
4. Is my patch ok?
H.J.
----
2001-06-14 H.J. Lu <hjl@gnu.org>
* config/mips/mips.md (exception_receiver): New.
--- gcc/config/mips/mips.md.except Thu Jun 14 10:34:34 2001
+++ gcc/config/mips/mips.md Thu Jun 14 11:36:31 2001
@@ -10461,3 +10461,21 @@ ld\\t%2,%1-%S1(%2)\;daddu\\t%2,%2,$31\;j
[(set_attr "type" "arith")
(set_attr "mode" "DI")
(set_attr "length" "40")])
+
+;; For o32, the gp register is call clobbered, so it must
+;; be saved & restored around calls by the caller. If the call
+;; doesn't return normally (nonlocal goto, or an exception is
+;; thrown), then the code at the exception handler label must
+;; restore the gp register.
+(define_insn "exception_receiver"
+ [(const_int 4)]
+ "mips_abi == ABI_32"
+ "*
+{
+ static char ldgp[40];
+ sprintf (ldgp, \"lw\\t$gp,%ld($sp)\", current_frame_info.args_size);
+ return ldgp;
+}"
+ [(set_attr "type" "load")
+ (set_attr "mode" "SI")
+ (set_attr "length" "4")])
