home *** CD-ROM | disk | FTP | other *** search
- From: Julian F. Reschke <julian@GOEDEL.UNI-MUENSTER.DE>
- Subject: Re: Bug in crt0.cpp ?
- Date: Mon, 8 Mar 93 14:48:12 MET DST
- In-Reply-To: <9303081334.AA15165@math.uni-muenster.de>; from "Ulrich Kuehn" at Mar 08, 93 2:34 pm
-
- >
- > Hi,
- > I just came across an interesting point: in crt0, there is a test for
- > the program being started as accessory:
- > subl a6, a6 | clear a6 for debuggers
- > cmpw #0, a0 | test if acc or program
- > beq __startprg | if a program, go elsewhere
- > tstl a0@(36) | also test parent basepage pointer
- > bne __startprg | for accs, it must be 0
- > movel a0, Base | acc basepage is in A0
- > lea a0@(252), sp | use the command line as a temporary stack
- > jmp __acc_main | function is in crtinit.c
- > But atari has documented that accessories are started with a0 containing
- > the basepage pointer, they said nothing about the pointer to the parent's
- > basepage.
- > Why is there a test for the parent pointer to be zero?
- > It might break some accessories written with gcc, or am I too pessimistic?
- >
- > Ulrich
-
- Especially when started from MultiTOS, I think.
-
- --
- ________________ cut here _________________________
- Julian F. Reschke, Hensenstr. 142, D-W4400 Muenster
- eMail: julian@math.uni-muenster.de, jr@ms.maus.de
- ________ correct me if I'm wrong __________________
-