diff options
Diffstat (limited to 'unix/tclLoadDyld.c')
| -rw-r--r-- | unix/tclLoadDyld.c | 572 |
1 files changed, 309 insertions, 263 deletions
diff --git a/unix/tclLoadDyld.c b/unix/tclLoadDyld.c index 60ec680..67a797d 100644 --- a/unix/tclLoadDyld.c +++ b/unix/tclLoadDyld.c @@ -1,17 +1,16 @@ -/* +/* * tclLoadDyld.c -- * - * This procedure provides a version of the TclLoadFile that - * works with Apple's dyld dynamic loading. This file - * provided by Wilfredo Sanchez (wsanchez@apple.com). - * This works on Mac OS X. + * This procedure provides a version of the TclLoadFile that works with + * Apple's dyld dynamic loading. This file provided by Wilfredo Sanchez + * (wsanchez@apple.com). This works on Mac OS X. * * Copyright (c) 1995 Apple Computer, Inc. * - * See the file "license.terms" for information on usage and redistribution - * of this file, and for a DISCLAIMER OF ALL WARRANTIES. + * See the file "license.terms" for information on usage and redistribution of + * this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * RCS: @(#) $Id: tclLoadDyld.c,v 1.17 2005/05/23 20:19:47 das Exp $ + * RCS: @(#) $Id: tclLoadDyld.c,v 1.18 2005/07/19 08:51:29 dkf Exp $ */ #include "tclInt.h" @@ -19,18 +18,18 @@ #include <mach/mach.h> typedef struct Tcl_DyldModuleHandle { - struct Tcl_DyldModuleHandle *nextModuleHandle; + struct Tcl_DyldModuleHandle *nextPtr; NSModule module; } Tcl_DyldModuleHandle; typedef struct Tcl_DyldLoadHandle { - CONST struct mach_header *dyld_lib; - Tcl_DyldModuleHandle *firstModuleHandle; + CONST struct mach_header *dyldLibHeader; + Tcl_DyldModuleHandle *modulePtr; } Tcl_DyldLoadHandle; #ifdef TCL_LOAD_FROM_MEMORY typedef struct ThreadSpecificData { - int haveLoadMemory; + int haveLoadMemory; } ThreadSpecificData; static Tcl_ThreadDataKey dataKey; @@ -41,44 +40,36 @@ static Tcl_ThreadDataKey dataKey; * * DyldOFIErrorMsg -- * - * Converts a numerical NSObjectFileImage error into an - * error message string. + * Converts a numerical NSObjectFileImage error into an error message + * string. * * Results: - * Error message string. + * Error message string. * * Side effects: - * None. + * None. * *---------------------------------------------------------------------- */ -static CONST char* DyldOFIErrorMsg(int err) { - CONST char *ofi_msg = NULL; - - if (err != NSObjectFileImageSuccess) { - switch(err) { - case NSObjectFileImageFailure: - ofi_msg = "object file setup failure"; - break; - case NSObjectFileImageInappropriateFile: - ofi_msg = "not a Mach-O MH_BUNDLE file"; - break; - case NSObjectFileImageArch: - ofi_msg = "no object for this architecture"; - break; - case NSObjectFileImageFormat: - ofi_msg = "bad object file format"; - break; - case NSObjectFileImageAccess: - ofi_msg = "can't read object file"; - break; - default: - ofi_msg = "unknown error"; - break; - } +static CONST char* +DyldOFIErrorMsg(int err) { + switch(err) { + case NSObjectFileImageSuccess: + return NULL; + case NSObjectFileImageFailure: + return "object file setup failure"; + case NSObjectFileImageInappropriateFile: + return "not a Mach-O MH_BUNDLE file"; + case NSObjectFileImageArch: + return "no object for this architecture"; + case NSObjectFileImageFormat: + return "bad object file format"; + case NSObjectFileImageAccess: + return "can't read object file"; + default: + return "unknown error"; } - return ofi_msg; } /* @@ -86,15 +77,15 @@ static CONST char* DyldOFIErrorMsg(int err) { * * TclpDlopen -- * - * Dynamically loads a binary code file into memory and returns - * a handle to the new code. + * Dynamically loads a binary code file into memory and returns a handle + * to the new code. * * Results: - * A standard Tcl completion code. If an error occurs, an error - * message is left in the interpreter's result. + * A standard Tcl completion code. If an error occurs, an error message + * is left in the interpreter's result. * * Side effects: - * New code suddenly appears in memory. + * New code suddenly appears in memory. * *---------------------------------------------------------------------- */ @@ -105,90 +96,102 @@ TclpDlopen(interp, pathPtr, loadHandle, unloadProcPtr) Tcl_Obj *pathPtr; /* Name of the file containing the desired * code (UTF-8). */ Tcl_LoadHandle *loadHandle; /* Filled with token for dynamically loaded - * file which will be passed back to + * file which will be passed back to * (*unloadProcPtr)() to unload the file. */ - Tcl_FSUnloadFileProc **unloadProcPtr; + Tcl_FSUnloadFileProc **unloadProcPtr; /* Filled with address of Tcl_FSUnloadFileProc - * function which should be used for - * this file. */ + * function which should be used for this + * file. */ { Tcl_DyldLoadHandle *dyldLoadHandle; - CONST struct mach_header *dyld_lib; - NSObjectFileImage dyld_ofi = NULL; - Tcl_DyldModuleHandle *dyldModuleHandle = NULL; + CONST struct mach_header *dyldLibHeader; + NSObjectFileImage dyldObjFileImage = NULL; + Tcl_DyldModuleHandle *modulePtr = NULL; CONST char *native; - /* - * First try the full path the user gave us. This is particularly - * important if the cwd is inside a vfs, and we are trying to load - * using a relative path. + /* + * First try the full path the user gave us. This is particularly + * important if the cwd is inside a vfs, and we are trying to load using a + * relative path. */ + native = Tcl_FSGetNativePath(pathPtr); - dyld_lib = NSAddImage(native, - NSADDIMAGE_OPTION_WITH_SEARCHING | - NSADDIMAGE_OPTION_RETURN_ON_ERROR); - - if (!dyld_lib) { - NSLinkEditErrors editError; - CONST char *name, *msg, *ofi_msg = NULL; - - NSLinkEditError(&editError, &errno, &name, &msg); - if (editError == NSLinkEditFileAccessError) { - /* The requested file was not found: - * let the OS loader examine the binary search path for - * whatever string the user gave us which hopefully refers - * to a file on the binary path - */ - Tcl_DString ds; - char *fileName = Tcl_GetString(pathPtr); - CONST char *native = Tcl_UtfToExternalDString(NULL, fileName, -1, &ds); - dyld_lib = NSAddImage(native, - NSADDIMAGE_OPTION_WITH_SEARCHING | - NSADDIMAGE_OPTION_RETURN_ON_ERROR); - Tcl_DStringFree(&ds); - if (!dyld_lib) { - NSLinkEditError(&editError, &errno, &name, &msg); - } - } else if ((editError == NSLinkEditFileFormatError && errno == EBADMACHO)) { - /* The requested file was found but was not of type MH_DYLIB, - * attempt to load it as a MH_BUNDLE: */ - NSObjectFileImageReturnCode err; - err = NSCreateObjectFileImageFromFile(native, &dyld_ofi); - ofi_msg = DyldOFIErrorMsg(err); - } - if (!dyld_lib && !dyld_ofi) { - Tcl_AppendResult(interp, msg, (char *) NULL); - if (ofi_msg) { - Tcl_AppendResult(interp, "NSCreateObjectFileImageFromFile() error: ", - ofi_msg, (char *) NULL); - } - return TCL_ERROR; - } + dyldLibHeader = NSAddImage(native, NSADDIMAGE_OPTION_WITH_SEARCHING | + NSADDIMAGE_OPTION_RETURN_ON_ERROR); + + if (!dyldLibHeader) { + NSLinkEditErrors editError; + CONST char *name, *msg, *objFileImageErrMsg = NULL; + + NSLinkEditError(&editError, &errno, &name, &msg); + + if (editError == NSLinkEditFileAccessError) { + /* + * The requested file was not found. Let the OS loader examine the + * binary search path for whatever string the user gave us which + * hopefully refers to a file on the binary path. + */ + + Tcl_DString ds; + char *fileName = Tcl_GetString(pathPtr); + CONST char *native = + Tcl_UtfToExternalDString(NULL, fileName, -1, &ds); + + dyldLibHeader = NSAddImage(native, NSADDIMAGE_OPTION_WITH_SEARCHING + | NSADDIMAGE_OPTION_RETURN_ON_ERROR); + Tcl_DStringFree(&ds); + if (!dyldLibHeader) { + NSLinkEditError(&editError, &errno, &name, &msg); + } + } else if (editError==NSLinkEditFileFormatError && errno==EBADMACHO) { + /* + * The requested file was found but was not of type MH_DYLIB, + * attempt to load it as a MH_BUNDLE. + */ + + NSObjectFileImageReturnCode err = + NSCreateObjectFileImageFromFile(native, &dyldObjFileImage); + objFileImageErrMsg = DyldOFIErrorMsg(err); + } + + if (!dyldLibHeader && !dyldObjFileImage) { + Tcl_AppendResult(interp, msg, (char *) NULL); + if (objFileImageErrMsg) { + Tcl_AppendResult(interp, + "NSCreateObjectFileImageFromFile() error: ", + objFileImageErrMsg, (char *) NULL); + } + return TCL_ERROR; + } } - - if (dyld_ofi) { - NSModule module; - module = NSLinkModule(dyld_ofi, native, NSLINKMODULE_OPTION_BINDNOW | - NSLINKMODULE_OPTION_RETURN_ON_ERROR); - NSDestroyObjectFileImage(dyld_ofi); - if (module) { - dyldModuleHandle = (Tcl_DyldModuleHandle *) - ckalloc(sizeof(Tcl_DyldModuleHandle)); - if (!dyldModuleHandle) return TCL_ERROR; - dyldModuleHandle->module = module; - dyldModuleHandle->nextModuleHandle = NULL; - } else { - NSLinkEditErrors editError; - CONST char *name, *msg; - NSLinkEditError(&editError, &errno, &name, &msg); - Tcl_AppendResult(interp, msg, (char *) NULL); - return TCL_ERROR; - } + + if (dyldObjFileImage) { + NSModule module; + + module = NSLinkModule(dyldObjFileImage, native, + NSLINKMODULE_OPTION_BINDNOW + | NSLINKMODULE_OPTION_RETURN_ON_ERROR); + NSDestroyObjectFileImage(dyldObjFileImage); + + if (!module) { + NSLinkEditErrors editError; + CONST char *name, *msg; + + NSLinkEditError(&editError, &errno, &name, &msg); + Tcl_AppendResult(interp, msg, (char *) NULL); + return TCL_ERROR; + } + + modulePtr = (Tcl_DyldModuleHandle *) + ckalloc(sizeof(Tcl_DyldModuleHandle)); + modulePtr->module = module; + modulePtr->nextPtr = NULL; } - dyldLoadHandle = (Tcl_DyldLoadHandle *) ckalloc(sizeof(Tcl_DyldLoadHandle)); - if (!dyldLoadHandle) return TCL_ERROR; - dyldLoadHandle->dyld_lib = dyld_lib; - dyldLoadHandle->firstModuleHandle = dyldModuleHandle; + + dyldLoadHandle = (Tcl_DyldLoadHandle *) + ckalloc(sizeof(Tcl_DyldLoadHandle)); + dyldLoadHandle->dyldLibHeader = dyldLibHeader; + dyldLoadHandle->modulePtr = modulePtr; *loadHandle = (Tcl_LoadHandle) dyldLoadHandle; *unloadProcPtr = &TclpUnloadFile; return TCL_OK; @@ -199,75 +202,84 @@ TclpDlopen(interp, pathPtr, loadHandle, unloadProcPtr) * * TclpFindSymbol -- * - * Looks up a symbol, by name, through a handle associated with - * a previously loaded piece of code (shared library). + * Looks up a symbol, by name, through a handle associated with a + * previously loaded piece of code (shared library). * * Results: - * Returns a pointer to the function associated with 'symbol' if - * it is found. Otherwise returns NULL and may leave an error - * message in the interp's result. + * Returns a pointer to the function associated with 'symbol' if it is + * found. Otherwise returns NULL and may leave an error message in the + * interp's result. * *---------------------------------------------------------------------- */ + MODULE_SCOPE Tcl_PackageInitProc* -TclpFindSymbol(interp, loadHandle, symbol) - Tcl_Interp *interp; - Tcl_LoadHandle loadHandle; - CONST char *symbol; +TclpFindSymbol(interp, loadHandle, symbol) + Tcl_Interp *interp; /* For error reporting. */ + Tcl_LoadHandle loadHandle; /* Handle from TclpDlopen. */ + CONST char *symbol; /* Symbol name to look up. */ { NSSymbol nsSymbol; CONST char *native; Tcl_DString newName, ds; Tcl_PackageInitProc* proc = NULL; Tcl_DyldLoadHandle *dyldLoadHandle = (Tcl_DyldLoadHandle *) loadHandle; - /* + + /* * dyld adds an underscore to the beginning of symbol names. */ + native = Tcl_UtfToExternalDString(NULL, symbol, -1, &ds); Tcl_DStringInit(&newName); Tcl_DStringAppend(&newName, "_", 1); native = Tcl_DStringAppend(&newName, native, -1); - if (dyldLoadHandle->dyld_lib) { - nsSymbol = NSLookupSymbolInImage(dyldLoadHandle->dyld_lib, native, - NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_NOW | - NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR); - if(nsSymbol) { - /* until dyld supports unloading of MY_DYLIB binaries, the - * following is not needed: */ + + if (dyldLoadHandle->dyldLibHeader) { + nsSymbol = NSLookupSymbolInImage(dyldLoadHandle->dyldLibHeader, native, + NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_NOW | + NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR); + if (nsSymbol) { + /* + * Until dyld supports unloading of MY_DYLIB binaries, the + * following is not needed. + */ + #ifdef DYLD_SUPPORTS_DYLIB_UNLOADING - NSModule module = NSModuleForSymbol(nsSymbol); - Tcl_DyldModuleHandle *dyldModuleHandle = dyldLoadHandle->firstModuleHandle; - while (dyldModuleHandle) { - if (module == dyldModuleHandle->module) break; - dyldModuleHandle = dyldModuleHandle->nextModuleHandle; - } - if (!dyldModuleHandle) { - dyldModuleHandle = (Tcl_DyldModuleHandle *) - ckalloc(sizeof(Tcl_DyldModuleHandle)); - if (dyldModuleHandle) { - dyldModuleHandle->module = module; - dyldModuleHandle->nextModuleHandle = - dyldLoadHandle->firstModuleHandle; - dyldLoadHandle->firstModuleHandle = dyldModuleHandle; - } - } + NSModule module = NSModuleForSymbol(nsSymbol); + Tcl_DyldModuleHandle *modulePtr = dyldLoadHandle->modulePtr; + + while (modulePtr != NULL) { + if (module == modulePtr->module) { + break; + } + modulePtr = modulePtr->nextPtr; + } + if (modulePtr == NULL) { + modulePtr = (Tcl_DyldModuleHandle *) + ckalloc(sizeof(Tcl_DyldModuleHandle)); + modulePtr->module = module; + modulePtr->nextPtr = dyldLoadHandle->modulePtr; + dyldLoadHandle->modulePtr = modulePtr; + } #endif /* DYLD_SUPPORTS_DYLIB_UNLOADING */ - } else { - NSLinkEditErrors editError; - CONST char *name, *msg; - NSLinkEditError(&editError, &errno, &name, &msg); - Tcl_AppendResult(interp, msg, (char *) NULL); - } + + } else { + NSLinkEditErrors editError; + CONST char *name, *msg; + + NSLinkEditError(&editError, &errno, &name, &msg); + Tcl_AppendResult(interp, msg, (char *) NULL); + } } else { - nsSymbol = NSLookupSymbolInModule(dyldLoadHandle->firstModuleHandle->module, - native); + nsSymbol = NSLookupSymbolInModule(dyldLoadHandle->modulePtr->module, + native); } - if(nsSymbol) { - proc = NSAddressOfSymbol(nsSymbol); + if (nsSymbol) { + proc = NSAddressOfSymbol(nsSymbol); } Tcl_DStringFree(&newName); Tcl_DStringFree(&ds); - + return proc; } @@ -276,37 +288,37 @@ TclpFindSymbol(interp, loadHandle, symbol) * * TclpUnloadFile -- * - * Unloads a dynamically loaded binary code file from memory. - * Code pointers in the formerly loaded file are no longer valid - * after calling this function. + * Unloads a dynamically loaded binary code file from memory. Code + * pointers in the formerly loaded file are no longer valid after calling + * this function. * * Results: - * None. + * None. * * Side effects: - * Code dissapears from memory. - * Note that dyld currently only supports unloading of binaries of - * type MH_BUNDLE loaded with NSLinkModule() in TclpDlopen() above. + * Code dissapears from memory. Note that dyld currently only supports + * unloading of binaries of type MH_BUNDLE loaded with NSLinkModule() in + * TclpDlopen() above. * *---------------------------------------------------------------------- */ MODULE_SCOPE void TclpUnloadFile(loadHandle) - Tcl_LoadHandle loadHandle; /* loadHandle returned by a previous call - * to TclpDlopen(). The loadHandle is - * a token that represents the loaded - * file. */ + Tcl_LoadHandle loadHandle; /* loadHandle returned by a previous call to + * TclpDlopen(). The loadHandle is a token + * that represents the loaded file. */ { Tcl_DyldLoadHandle *dyldLoadHandle = (Tcl_DyldLoadHandle *) loadHandle; - Tcl_DyldModuleHandle *dyldModuleHandle = dyldLoadHandle->firstModuleHandle; - void *ptr; - - while (dyldModuleHandle) { - NSUnLinkModule(dyldModuleHandle->module, - NSUNLINKMODULE_OPTION_RESET_LAZY_REFERENCES); - ptr = dyldModuleHandle; - dyldModuleHandle = dyldModuleHandle->nextModuleHandle; + Tcl_DyldModuleHandle *modulePtr = dyldLoadHandle->modulePtr; + + while (modulePtr != NULL) { + void *ptr; + + NSUnLinkModule(modulePtr->module, + NSUNLINKMODULE_OPTION_RESET_LAZY_REFERENCES); + ptr = modulePtr; + modulePtr = modulePtr->nextPtr; ckfree(ptr); } ckfree((char*) dyldLoadHandle); @@ -317,27 +329,27 @@ TclpUnloadFile(loadHandle) * * TclGuessPackageName -- * - * If the "load" command is invoked without providing a package - * name, this procedure is invoked to try to figure it out. + * If the "load" command is invoked without providing a package name, + * this procedure is invoked to try to figure it out. * * Results: - * Always returns 0 to indicate that we couldn't figure out a - * package name; generic code will then try to guess the package - * from the file name. A return value of 1 would have meant that - * we figured out the package name and put it in bufPtr. + * Always returns 0 to indicate that we couldn't figure out a package + * name; generic code will then try to guess the package from the file + * name. A return value of 1 would have meant that we figured out the + * package name and put it in bufPtr. * * Side effects: - * None. + * None. * *---------------------------------------------------------------------- */ MODULE_SCOPE int TclGuessPackageName(fileName, bufPtr) - CONST char *fileName; /* Name of file containing package (already - * translated to local form if needed). */ - Tcl_DString *bufPtr; /* Initialized empty dstring. Append - * package name to this if possible. */ + CONST char *fileName; /* Name of file containing package (already + * translated to local form if needed). */ + Tcl_DString *bufPtr; /* Initialized empty dstring. Append package + * name to this if possible. */ { return 0; } @@ -351,10 +363,10 @@ TclGuessPackageName(fileName, bufPtr) * Allocate a buffer that can be used with TclpLoadMemory() below. * * Results: - * Pointer to allocated buffer or NULL if an error occurs. + * Pointer to allocated buffer or NULL if an error occurs. * * Side effects: - * Buffer is allocated. + * Buffer is allocated. * *---------------------------------------------------------------------- */ @@ -362,30 +374,34 @@ TclGuessPackageName(fileName, bufPtr) MODULE_SCOPE void* TclpLoadMemoryGetBuffer(interp, size) Tcl_Interp *interp; /* Used for error reporting. */ - int size; /* Size of desired buffer */ + int size; /* Size of desired buffer. */ { ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - void * buffer = NULL; - + void *buffer = NULL; + if (!tsdPtr->haveLoadMemory) { - /* NSCreateObjectFileImageFromMemory is available but always - * fails prior to Darwin 7 */ - struct utsname name; - if (!uname(&name)) { - long release = strtol(name.release, NULL, 10); - tsdPtr->haveLoadMemory = (release >= 7) ? 1 : -1; - } + /* + * NSCreateObjectFileImageFromMemory is available but always fails + * prior to Darwin 7. + */ + + struct utsname name; + + if (!uname(&name)) { + long release = strtol(name.release, NULL, 10); + tsdPtr->haveLoadMemory = (release >= 7) ? 1 : -1; + } } if (tsdPtr->haveLoadMemory > 0) { - /* We must allocate the buffer using vm_allocate, because - * NSCreateObjectFileImageFromMemory will dispose of it - * using vm_deallocate. - */ - int err = vm_allocate(mach_task_self(), - (vm_address_t*)&buffer, size, 1); - if (err) { - buffer = NULL; - } + /* + * We must allocate the buffer using vm_allocate, because + * NSCreateObjectFileImageFromMemory will dispose of it using + * vm_deallocate. + */ + + if (vm_allocate(mach_task_self(), (vm_address_t *) &buffer, size, 1)) { + buffer = NULL; + } } return buffer; } @@ -395,15 +411,15 @@ TclpLoadMemoryGetBuffer(interp, size) * * TclpLoadMemory -- * - * Dynamically loads binary code file from memory and returns - * a handle to the new code. + * Dynamically loads binary code file from memory and returns a handle to + * the new code. * * Results: - * A standard Tcl completion code. If an error occurs, an error - * message is left in the interpreter's result. + * A standard Tcl completion code. If an error occurs, an error message + * is left in the interpreter's result. * * Side effects: - * New code is loaded from memory. + * New code is loaded from memory. * *---------------------------------------------------------------------- */ @@ -413,60 +429,90 @@ TclpLoadMemory(interp, buffer, size, codeSize, loadHandle, unloadProcPtr) Tcl_Interp *interp; /* Used for error reporting. */ void *buffer; /* Buffer containing the desired code * (allocated with TclpLoadMemoryGetBuffer). */ - int size; /* Allocation size of buffer. */ - int codeSize; /* Size of code data read into buffer or -1 if - * an error occurred and the buffer should - * just be freed. */ + int size; /* Allocation size of buffer. */ + int codeSize; /* Size of code data read into buffer or -1 if + * an error occurred and the buffer should + * just be freed. */ Tcl_LoadHandle *loadHandle; /* Filled with token for dynamically loaded - * file which will be passed back to + * file which will be passed back to * (*unloadProcPtr)() to unload the file. */ - Tcl_FSUnloadFileProc **unloadProcPtr; + Tcl_FSUnloadFileProc **unloadProcPtr; /* Filled with address of Tcl_FSUnloadFileProc - * function which should be used for - * this file. */ + * function which should be used for this + * file. */ { Tcl_DyldLoadHandle *dyldLoadHandle; - NSObjectFileImage dyld_ofi = NULL; - Tcl_DyldModuleHandle *dyldModuleHandle; - CONST char *ofi_msg = NULL; + NSObjectFileImage dyldObjFileImage = NULL; + Tcl_DyldModuleHandle *modulePtr; + NSModule module; + CONST char *objFileImageErrMsg = NULL; + + /* + * Try to create an object file image that we can load from. + */ if (codeSize >= 0) { - NSObjectFileImageReturnCode err; - err = NSCreateObjectFileImageFromMemory(buffer, codeSize, &dyld_ofi); - ofi_msg = DyldOFIErrorMsg(err); + NSObjectFileImageReturnCode err; + + err = NSCreateObjectFileImageFromMemory(buffer, codeSize, + &dyldObjFileImage); + objFileImageErrMsg = DyldOFIErrorMsg(err); } - if (!dyld_ofi) { - vm_deallocate(mach_task_self(), (vm_address_t) buffer, size); - if (ofi_msg) { - Tcl_AppendResult(interp, "NSCreateObjectFileImageFromFile() error: ", - ofi_msg, (char *) NULL); - } - return TCL_ERROR; - } else { - NSModule module; - module = NSLinkModule(dyld_ofi, "[Memory Based Bundle]", - NSLINKMODULE_OPTION_BINDNOW |NSLINKMODULE_OPTION_RETURN_ON_ERROR); - NSDestroyObjectFileImage(dyld_ofi); - if (module) { - dyldModuleHandle = (Tcl_DyldModuleHandle *) - ckalloc(sizeof(Tcl_DyldModuleHandle)); - if (!dyldModuleHandle) return TCL_ERROR; - dyldModuleHandle->module = module; - dyldModuleHandle->nextModuleHandle = NULL; - } else { - NSLinkEditErrors editError; - CONST char *name, *msg; - NSLinkEditError(&editError, &errno, &name, &msg); - Tcl_AppendResult(interp, msg, (char *) NULL); - return TCL_ERROR; - } + + /* + * If it went wrong (or we were asked to just deallocate), get rid of the + * memory block and create an error message. + */ + + if (dyldObjFileImage == NULL) { + vm_deallocate(mach_task_self(), (vm_address_t) buffer, size); + if (objFileImageErrMsg != NULL) { + Tcl_AppendResult(interp, + "NSCreateObjectFileImageFromFile() error: ", + objFileImageErrMsg, (char *) NULL); + } + return TCL_ERROR; } - dyldLoadHandle = (Tcl_DyldLoadHandle *) ckalloc(sizeof(Tcl_DyldLoadHandle)); - if (!dyldLoadHandle) return TCL_ERROR; - dyldLoadHandle->dyld_lib = NULL; - dyldLoadHandle->firstModuleHandle = dyldModuleHandle; + + /* + * Extract the module we want from the image of the object file. + */ + + module = NSLinkModule(dyldObjFileImage, "[Memory Based Bundle]", + NSLINKMODULE_OPTION_BINDNOW | NSLINKMODULE_OPTION_RETURN_ON_ERROR); + NSDestroyObjectFileImage(dyldObjFileImage); + + if (!module) { + NSLinkEditErrors editError; + CONST char *name, *msg; + + NSLinkEditError(&editError, &errno, &name, &msg); + Tcl_AppendResult(interp, msg, (char *) NULL); + return TCL_ERROR; + } + + /* + * Stash the module reference within the load handle we create and return. + */ + + modulePtr = (Tcl_DyldModuleHandle *) ckalloc(sizeof(Tcl_DyldModuleHandle)); + modulePtr->module = module; + modulePtr->nextPtr = NULL; + + dyldLoadHandle = (Tcl_DyldLoadHandle *) + ckalloc(sizeof(Tcl_DyldLoadHandle)); + dyldLoadHandle->dyldLibHeader = NULL; + dyldLoadHandle->modulePtr = modulePtr; *loadHandle = (Tcl_LoadHandle) dyldLoadHandle; *unloadProcPtr = &TclpUnloadFile; return TCL_OK; } #endif + +/* + * Local Variables: + * mode: c + * c-basic-offset: 4 + * fill-column: 78 + * End: + */ |