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104 lines
4.9 KiB
C
104 lines
4.9 KiB
C
/*****************************************************************************/
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/* */
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/* modload.h */
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/* */
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/* o65 module loader interface for cc65 */
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/* */
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/* */
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/* */
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/* (C) 2002 Ullrich von Bassewitz */
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/* Wacholderweg 14 */
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/* D-70597 Stuttgart */
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/* EMail: uz@musoftware.de */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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/* Exports structures and functions to load relocatable o65 modules at
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** runtime.
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*/
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#ifndef _MODLOAD_H
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#define _MODLOAD_H
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/* The following struct is passed to the module loader. It contains stuff,
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** the loader needs to work, and another area where the loader will place
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** informational data if it was successful. You will have to check the return
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** code of mod_load before accessing any of these additional struct members.
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*/
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struct mod_ctrl {
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/* Parameters passed into the loader routine. The member callerdata
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** is an opaque 16 bit datatype that may be used by the caller to
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** pass data through to the read routine. The read routine is used by the
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** loader to load any required data. There are several calls where the
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** read routine is passed a count of 1, so you may choose to make this
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** a special case when implementing read(). The read() should return the
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** number of bytes actually read. If the return value differs from the
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** passed count, this is considered an error.
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** NOTE: read() is designed so that the POSIX read() routine can be used
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** for this vector, if you're loading from disk.
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*/
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int __fastcall__ (*read) (int callerdata, void* buffer, unsigned count);
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int callerdata;
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/* Parameters set by the loader routine */
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void* module; /* Pointer to module data */
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unsigned module_size; /* Total size of loaded module */
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unsigned module_id; /* Module id */
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};
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unsigned char __fastcall__ mod_load (struct mod_ctrl* ctrl);
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/* Load a module into memory and relocate it. The function will return an
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** error code (see below). If MLOAD_OK is returned, the outgoing fields in
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** the passed mod_ctrl struct contain information about the module just
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** loaded.
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*/
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void __fastcall__ mod_free (void* module);
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/* Free a loaded module. Note: The given pointer is the pointer to the
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** module memory, not a pointer to a control structure.
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*/
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/* Errors */
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#define MLOAD_OK 0 /* Module load successful */
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#define MLOAD_ERR_READ 1 /* Read error */
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#define MLOAD_ERR_HDR 2 /* Header error */
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#define MLOAD_ERR_OS 3 /* Wrong OS */
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#define MLOAD_ERR_FMT 4 /* Data format error */
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#define MLOAD_ERR_MEM 5 /* Not enough memory */
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/* End of modload.h */
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#endif
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