Path: chuka.playstation.co.uk!news
From: "Steve Dunn" <stevedunn@dial.pipex.com>
Newsgroups: scea.yaroze.programming.codewarrior,scee.yaroze.programming.codewarrior
Subject: Libraries again...(and malloc)
Date: Sun, 8 Mar 1998 18:17:26 -0000
Organization: PlayStation Net Yaroze (SCEE)
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Hi there,
    I've got the libraries semi working.
Thanks to all that replied.
I have a library called 3DLib.lib.  A
class in this library allocates memory
for order tables and packet buffers.
The problem is that malloc is allocating
all over the code area.
It goes like this...
    Main PSX exe is located at
0x80140000 and is 0x4000 (16384) bytes
in length.  Assuming the heap is
initialised correctly (anyone know how
to step into this in psstart.c?) the
next available memory address should be
> 0x80144000 right? Well....
To test the problem, I have simply stuck
in the following in a method in one of
the classes exported from the library.

 void* p = NULL ;
 p = malloc( 100 ) ;

Looking at 'p', it turns out that
'malloc' has decided that 0x801432B4 is
the best place to put the memory.
As soon as the alloc is called the
'this' pointer goes bezerk, changing
from 0x801FFEEC to 0xFFFFFFFE, and
depending on what's being done next,
some very exotic errors appear, from the
run of the mill 'bus error' right up to
errors that get very personal and
threatening.

My questions are(in order of importance
and annoyance)...

Why is malloc misbehaving ?

What is the relevance of the 'code
address' for libraries ?

How do you step into the 'init heap'
code supplied via the 'stationary' ?

Why can't the 'code model' be changed to
'position independent code' for libs?

Am I being completely thick and missing
something that a blind donkey could spot
whilst juggling and whistling with a
mouth-full of carrots ?