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e941b34947
when the install routine failed. git-svn-id: svn://svn.cc65.org/cc65/trunk@3750 b7a2c559-68d2-44c3-8de9-860c34a00d81
120 lines
4.5 KiB
C
120 lines
4.5 KiB
C
/*****************************************************************************/
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/* */
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/* ser_load.c */
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/* */
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/* Loader module for serial drivers */
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/* */
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/* */
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/* */
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/* (C) 2003-2006, Ullrich von Bassewitz */
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/* Römerstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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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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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <modload.h>
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#include <serial.h>
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/*****************************************************************************/
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/* Data */
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/*****************************************************************************/
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/* Pointer to serial driver, exported from ser-kernel.s */
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extern void* ser_drv;
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/* Function that clears the driver pointer (ser-kernel.s) */
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void ser_clear_ptr (void);
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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/* Use static local variables, since the module is not reentrant anyway */
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#pragma staticlocals (on);
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unsigned char __fastcall__ ser_load_driver (const char* name)
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/* Load a serial driver and return an error code */
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{
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static struct mod_ctrl ctrl = {
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read /* Read from disk */
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};
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unsigned char Res;
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/* Check if we do already have a driver loaded. If so, remove it. */
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if (ser_drv != 0) {
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ser_uninstall ();
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}
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/* Now open the file */
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ctrl.callerdata = open (name, O_RDONLY);
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if (ctrl.callerdata >= 0) {
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/* Load the module */
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Res = mod_load (&ctrl);
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/* Close the input file */
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close (ctrl.callerdata);
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/* Check the return code */
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if (Res == MLOAD_OK) {
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/* Check the driver signature, install the driver */
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Res = ser_install (ctrl.module);
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/* If the driver did not install correctly, remove it from
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* memory again.
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*/
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if (Res != SER_ERR_OK) {
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/* Do not call ser_uninstall here, since the driver is not
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* correctly installed.
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*/
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mod_free (ser_drv);
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ser_clear_ptr ();
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}
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/* Return the error code */
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return Res;
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}
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}
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/* Error loading the driver */
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return SER_ERR_CANNOT_LOAD;
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}
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