lxdream.org :: lxdream/src/sh4/shadow.c r1198:407659e01ef0

filename	src/sh4/shadow.c
changeset	1198:407659e01ef0
prev	1194:ee6ce5804608
next	1201:5502572ce192
author	Nathan Keynes <nkeynes@lxdream.org>
date	Fri Dec 16 10:08:45 2011 +1000 (10 years ago)
permissions	-rw-r--r--
last change	Add volatile qualifier to return-address frobbing - works around optimizer bug in GCC versions after 4.2

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     1.1 --- a/src/sh4/shadow.c	Mon Dec 12 21:13:36 2011 +1000
     1.2 +++ b/src/sh4/shadow.c	Fri Dec 16 10:08:45 2011 +1000
     1.3 @@ -31,7 +31,7 @@
     1.4  #ifdef HAVE_FRAME_ADDRESS
     1.5  static FASTCALL __attribute__((noinline)) void *__first_arg(void *a, void *b) { return a; }
     1.6  #define INIT_EXCEPTIONS(label) goto *__first_arg(&&fnstart,&&label); fnstart:
     1.7 -#define EXCEPTION_EXIT(exc) do{ *(((void **)__builtin_frame_address(0))+1) = exc; } while(0)
     1.8 +#define EXCEPTION_EXIT(exc) do{ *(((void * volatile *)__builtin_frame_address(0))+1) = exc; } while(0)
     1.9  #else
    1.10  #define INIT_EXCEPTIONS(label)
    1.11  #define EXCEPTION_EXIT() sh4_core_exit(CORE_EXIT_EXCEPTION)