diff options
Diffstat (limited to 'gcc/ada/tracebak.c')
| -rw-r--r-- | gcc/ada/tracebak.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gcc/ada/tracebak.c b/gcc/ada/tracebak.c index eedc715a2e5..a8a200d4486 100644 --- a/gcc/ada/tracebak.c +++ b/gcc/ada/tracebak.c @@ -259,7 +259,13 @@ struct layout #define FRAME_OFFSET(FP) 0 #define PC_ADJUST -4 -#define STOP_FRAME(CURRENT, TOP_STACK) ((CURRENT)->next == 0) + +/* According to the base PPC ABI, a toplevel frame entry should feature + a null backchain. What happens at signal handler frontiers isn't so + well specified, so we add a safety guard on top. */ + +#define STOP_FRAME(CURRENT, TOP_STACK) \ + ((CURRENT)->next == 0 || ((long)(CURRENT)->next % __alignof__(void*)) != 0) #define BASE_SKIP 1 |