diff options
Diffstat (limited to 'gcc/ada/7sintman.adb')
| -rw-r--r-- | gcc/ada/7sintman.adb | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/gcc/ada/7sintman.adb b/gcc/ada/7sintman.adb index 72b1cf87380..801adac39f2 100644 --- a/gcc/ada/7sintman.adb +++ b/gcc/ada/7sintman.adb @@ -6,7 +6,7 @@ -- -- -- B o d y -- -- -- --- Copyright (C) 1992-2002, Free Software Foundation, Inc. -- +-- Copyright (C) 1992-2003, Free Software Foundation, Inc. -- -- -- -- GNARL is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- @@ -152,7 +152,7 @@ begin function State (Int : Interrupt_ID) return Character; pragma Import (C, State, "__gnat_get_interrupt_state"); - -- Get interrupt state. Defined in a-init.c + -- Get interrupt state. Defined in a-init.c -- The input argument is the interrupt number, -- and the result is one of the following: @@ -175,7 +175,16 @@ begin act.sa_handler := Notify_Exception'Address; - act.sa_flags := 0; + act.sa_flags := SA_SIGINFO; + + -- Setting SA_SIGINFO asks the kernel to pass more than just the signal + -- number argument to the handler when it is called. The set of extra + -- parameters typically includes a pointer to a structure describing + -- the interrupted context. Although the Notify_Exception handler does + -- not use this information, it is actually required for the GCC/ZCX + -- exception propagation scheme because on some targets (at least + -- alpha-tru64), the structure contents are not even filled when this + -- flag is not set. -- On some targets, we set sa_flags to SA_NODEFER so that during the -- handler execution we do not change the Signal_Mask to be masked for |