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Re: [avr-gcc-list] Add builtins in avr target.
From: |
Anatoly Sokolov |
Subject: |
Re: [avr-gcc-list] Add builtins in avr target. |
Date: |
Sat, 26 Apr 2008 20:52:07 +0400 |
Hi.
> __builtin_return_address is extremely useful for target error reporting.
> e.g. a function can be called(or trapped) to report error in another
> part of program. This allows such routines to determine the address of
> the caller without using naked asm functions.
>
> You are correct, that return address will only give 16bit pointer. But
> that covers most uses.
>
> It would seem easier to implement than create documents and disable all
> current and future testcases that use it. That would seem to be
> confirmed by the fact that bug reports have been outstanding since 2005.
>
> Of course, Eric and other AVR users may disagree.
>
Word or byte address return "__builtin_return_address"?
I consider that, it will be better that it returned the word address.
For those architectures where it cannot return the correct address, the
"__builtin_return_address" should be disabled.
+static void avr_init_builtins (void);
+#undef TARGET_INIT_BUILTINS
+#define TARGET_INIT_BUILTINS avr_init_builtins
+void
+avr_init_builtins (void)
+{
+ if (AVR_HAVE_EIJMP_EICALL) // if "__builtin_return_address" return word
address.
+ {
+ disable_builtin_function ("return_address");
+ }
+}
Anatoly.
- [avr-gcc-list] Add builtins in avr target., Anatoly Sokolov, 2008/04/04
- Re: [avr-gcc-list] Add builtins in avr target., Anatoly Sokolov, 2008/04/17
- Re: [avr-gcc-list] Add builtins in avr target., Anatoly Sokolov, 2008/04/17
- Re: [avr-gcc-list] Add builtins in avr target., Wouter van Gulik, 2008/04/17
- Re: [avr-gcc-list] Add builtins in avr target., Oleksandr Redchuk, 2008/04/17
- Re: [avr-gcc-list] Add builtins in avr target., Oleksandr Redchuk, 2008/04/17
- Re: [avr-gcc-list] Add builtins in avr target., Anatoly Sokolov, 2008/04/17
- RE: [avr-gcc-list] Add builtins in avr target., Weddington, Eric, 2008/04/17
- Re: [avr-gcc-list] Add builtins in avr target., Dmitry K., 2008/04/17
- RE: [avr-gcc-list] Add builtins in avr target., Weddington, Eric, 2008/04/18