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From: Gerhard Stoll <gerhard_stoll@gmx.de>
To: MiNT-List <mint@fishpool.com>
Subject: Re: [MiNT] Possible bug in cflib's font selector
Date: Tue, 22 Dec 2009 21:44:46 +0100
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Vincent Rivière wrote:

> I guess the functions xfsl_init(), xfsl_event() and xfsl_exit() are 
> called via assembler functions to cope with the mshort API, right ?

This functions are from the xFSL interface. Is it a frontselector. The 
program looks for the cookie 'xFSL'. There is an pointer to the 
structure:

typedef struct
{
  unsigned long xfsl;       /* Magic 'xFSL'              */
  unsigned int  revision;   /* Interface revision        */
  unsigned long product;    /* Font-selector identifier  */
  unsigned int  version;    /* Font-selector version     */
  xFSL_INPUT    xfsl_input; /* Simplified call           */
  xFSL_INIT     xfsl_init;  /* Init call                 */
  xFSL_EVENT    xfsl_event; /* Event call                */
  xFSL_EXIT     xfsl_exit;  /* Exit call                 */
  xFSL_INFO     xfsl_info;  /* Info call                 */
} xFSL;

> It says that the API is "Pure C cdecl".
> Does this mean that the clobbered registers are d0/d1/a0/a1, like GCC 
> ? Do you agree, Henk ?

I´m not Henk, but cdecl ist that what there stand. 
<http://toshyp.atari.org/00d00e.htm#Pure-C_20and_20_27cdecl_27> If you 
use 'cdecl' PureC put all paramters on the stack, normly it use for the 
parameter the register do-d2 and a0-a1. For PureC is defined that a 
assembler function must save the register d3-d7 and a2-a6.

This is not a system function like AES.

I saw that the tos.hyp is broken at this pages. It is time for a new 
release.

Gerhard