home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Atari Mega Archive 1
/
Atari Mega Archive - Volume 1.iso
/
lists
/
mint
/
l_0399
/
134
< prev
next >
Wrap
Internet Message Format
|
1994-08-27
|
1KB
From: Ulrich Kuehn <kuehn@GOEDEL.UNI-MUENSTER.DE>
Subject: Bug in crt0.cpp ?
Date: Mon, 08 Mar 93 14:34:46 +0100
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
+---------------+----------------------------+-------------------------+
| Ulrich Kuehn | Internet: | Do they know that they |
| Cand.Math.Inf | kuehn@math.uni-muenster.de | cannot eat their money? |
+---------------+----------------------------+-------------------------+