218 lines
8.8 KiB
C
218 lines
8.8 KiB
C
/*
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* Copyright (c) 1997-2003 by The XFree86 Project, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Except as contained in this notice, the name of the copyright holder(s)
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* and author(s) shall not be used in advertising or otherwise to promote
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* the sale, use or other dealings in this Software without prior written
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* authorization from the copyright holder(s) and author(s).
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*/
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/*
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* This file contains the parts of the loader interface that are visible
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* to modules. This is the only loader-related header that modules should
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* include.
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*
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* It should include a bare minimum of other headers.
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*
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* Longer term, the module/loader code should probably live directly under
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* Xserver/.
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*
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* XXX This file arguably belongs in xfree86/loader/.
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*/
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#ifndef _XF86MODULE_H
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#define _XF86MODULE_H
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#include "misc.h"
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#ifndef NULL
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#define NULL ((void *)0)
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#endif
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typedef enum {
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LD_RESOLV_IFDONE = 0, /* only check if no more
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delays pending */
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LD_RESOLV_NOW = 1, /* finish one delay step */
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LD_RESOLV_FORCE = 2 /* force checking... */
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} LoaderResolveOptions;
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#define DEFAULT_LIST ((char *)-1)
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/* This indicates a special module that doesn't have the usual entry point */
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#define EXTERN_MODULE ((pointer)-1)
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/* Built-in ABI classes. These definitions must not be changed. */
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#define ABI_CLASS_NONE NULL
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#define ABI_CLASS_ANSIC "X.Org ANSI C Emulation"
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#define ABI_CLASS_VIDEODRV "X.Org Video Driver"
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#define ABI_CLASS_XINPUT "X.Org XInput driver"
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#define ABI_CLASS_EXTENSION "X.Org Server Extension"
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#define ABI_CLASS_FONT "X.Org Font Renderer"
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#define ABI_MINOR_MASK 0x0000FFFF
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#define ABI_MAJOR_MASK 0xFFFF0000
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#define GET_ABI_MINOR(v) ((v) & ABI_MINOR_MASK)
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#define GET_ABI_MAJOR(v) (((v) & ABI_MAJOR_MASK) >> 16)
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#define SET_ABI_VERSION(maj, min) \
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((((maj) << 16) & ABI_MAJOR_MASK) | ((min) & ABI_MINOR_MASK))
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/*
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* ABI versions. Each version has a major and minor revision. Modules
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* using lower minor revisions must work with servers of a higher minor
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* revision. There is no compatibility between different major revisions.
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* Whenever the ABI_ANSIC_VERSION is changed, the others must also be
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* changed. The minor revision mask is 0x0000FFFF and the major revision
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* mask is 0xFFFF0000.
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*/
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#define ABI_ANSIC_VERSION SET_ABI_VERSION(0, 4)
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#define ABI_VIDEODRV_VERSION SET_ABI_VERSION(5, 0)
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#define ABI_XINPUT_VERSION SET_ABI_VERSION(5, 0)
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#define ABI_EXTENSION_VERSION SET_ABI_VERSION(2, 0)
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#define ABI_FONT_VERSION SET_ABI_VERSION(0, 6)
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#define MODINFOSTRING1 0xef23fdc5
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#define MODINFOSTRING2 0x10dc023a
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#ifndef MODULEVENDORSTRING
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#define MODULEVENDORSTRING "X.Org Foundation"
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#endif
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/* Error return codes for errmaj. New codes must only be added at the end. */
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typedef enum {
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LDR_NOERROR = 0,
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LDR_NOMEM, /* memory allocation failed */
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LDR_NOENT, /* Module file does not exist */
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LDR_NOSUBENT, /* pre-requsite file to be sub-loaded does not exist */
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LDR_NOSPACE, /* internal module array full */
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LDR_NOMODOPEN, /* module file could not be opened (check errmin) */
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LDR_UNKTYPE, /* file is not a recognized module type */
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LDR_NOLOAD, /* type specific loader failed */
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LDR_ONCEONLY, /* Module should only be loaded once (not an error) */
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LDR_NOPORTOPEN, /* could not open port (check errmin) */
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LDR_NOHARDWARE, /* could not query/initialize the hardware device */
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LDR_MISMATCH, /* the module didn't match the spec'd requirments */
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LDR_BADUSAGE, /* LoadModule is called with bad arguments */
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LDR_INVALID, /* The module doesn't have a valid ModuleData object */
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LDR_BADOS, /* The module doesn't support the OS */
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LDR_MODSPECIFIC /* A module-specific error in the SetupProc */
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} LoaderErrorCode;
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/*
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* Some common module classes. The moduleclass can be used to identify
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* that modules loaded are of the correct type. This is a finer
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* classification than the ABI classes even though the default set of
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* classes have the same names. For example, not all modules that require
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* the video driver ABI are themselves video drivers.
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*/
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#define MOD_CLASS_NONE NULL
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#define MOD_CLASS_VIDEODRV "X.Org Video Driver"
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#define MOD_CLASS_XINPUT "X.Org XInput Driver"
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#define MOD_CLASS_FONT "X.Org Font Renderer"
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#define MOD_CLASS_EXTENSION "X.Org Server Extension"
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/* This structure is expected to be returned by the initfunc */
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typedef struct {
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const char * modname; /* name of module, e.g. "foo" */
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const char * vendor; /* vendor specific string */
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CARD32 _modinfo1_; /* constant MODINFOSTRING1/2 to find */
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CARD32 _modinfo2_; /* infoarea with a binary editor or sign tool */
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CARD32 xf86version; /* contains XF86_VERSION_CURRENT */
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CARD8 majorversion; /* module-specific major version */
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CARD8 minorversion; /* module-specific minor version */
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CARD16 patchlevel; /* module-specific patch level */
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const char * abiclass; /* ABI class that the module uses */
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CARD32 abiversion; /* ABI version */
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const char * moduleclass; /* module class description */
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CARD32 checksum[4]; /* contains a digital signature of the */
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/* version info structure */
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} XF86ModuleVersionInfo;
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/*
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* This structure can be used to callers of LoadModule and LoadSubModule to
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* specify version and/or ABI requirements.
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*/
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typedef struct {
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CARD8 majorversion; /* module-specific major version */
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CARD8 minorversion; /* moudle-specific minor version */
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CARD16 patchlevel; /* module-specific patch level */
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const char * abiclass; /* ABI class that the module uses */
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CARD32 abiversion; /* ABI version */
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const char * moduleclass; /* module class */
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} XF86ModReqInfo;
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/* values to indicate unspecified fields in XF86ModReqInfo. */
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#define MAJOR_UNSPEC 0xFF
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#define MINOR_UNSPEC 0xFF
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#define PATCH_UNSPEC 0xFFFF
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#define ABI_VERS_UNSPEC 0xFFFFFFFF
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#define MODULE_VERSION_NUMERIC(maj, min, patch) \
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((((maj) & 0xFF) << 24) | (((min) & 0xFF) << 16) | (patch & 0xFFFF))
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#define GET_MODULE_MAJOR_VERSION(vers) (((vers) >> 24) & 0xFF)
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#define GET_MODULE_MINOR_VERSION(vers) (((vers) >> 16) & 0xFF)
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#define GET_MODULE_PATCHLEVEL(vers) ((vers) & 0xFFFF)
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#define INITARGS void
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typedef void (*InitExtension)(INITARGS);
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typedef struct {
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InitExtension initFunc;
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const char * name;
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Bool *disablePtr;
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InitExtension setupFunc;
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const char ** initDependencies;
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} ExtensionModule;
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extern _X_EXPORT ExtensionModule *ExtensionModuleList;
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/* Prototypes for Loader functions that are exported to modules */
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extern _X_EXPORT pointer LoadSubModule(pointer, const char *, const char **,
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const char **, pointer, const XF86ModReqInfo *,
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int *, int *);
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extern _X_EXPORT void UnloadSubModule(pointer);
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extern _X_EXPORT void UnloadModule (pointer);
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extern _X_EXPORT pointer LoaderSymbol(const char *);
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extern _X_EXPORT char **LoaderListDirs(const char **, const char **);
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extern _X_EXPORT void LoaderFreeDirList(char **);
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extern _X_EXPORT void LoaderErrorMsg(const char *, const char *, int, int);
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extern _X_EXPORT void LoadExtension(ExtensionModule *, Bool);
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extern _X_EXPORT void LoaderRefSymLists(const char **, ...);
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extern _X_EXPORT void LoaderRefSymbols(const char *, ...);
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extern _X_EXPORT void LoaderReqSymLists(const char **, ...);
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extern _X_EXPORT void LoaderReqSymbols(const char *, ...);
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extern _X_EXPORT int LoaderCheckUnresolved(int);
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extern _X_EXPORT void LoaderGetOS(const char **name, int *major, int *minor, int *teeny);
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extern _X_EXPORT Bool LoaderShouldIgnoreABI(void);
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extern _X_EXPORT int LoaderGetABIVersion(const char *abiclass);
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typedef pointer (*ModuleSetupProc)(pointer, pointer, int *, int *);
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typedef void (*ModuleTearDownProc)(pointer);
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#define MODULESETUPPROTO(func) pointer func(pointer, pointer, int*, int*)
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#define MODULETEARDOWNPROTO(func) void func(pointer)
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typedef struct {
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XF86ModuleVersionInfo * vers;
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ModuleSetupProc setup;
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ModuleTearDownProc teardown;
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} XF86ModuleData;
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#endif /* _XF86STR_H */
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