tclLoadDyld.c
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上传日期:2015-12-11
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文件大小:22k
- /*
- * tclLoadDyld.c --
- *
- * This procedure provides a version of the TclLoadFile that works with
- * Apple's dyld dynamic loading.
- * Original version of his file (superseded long ago) provided by
- * Wilfredo Sanchez (wsanchez@apple.com).
- *
- * Copyright (c) 1995 Apple Computer, Inc.
- * Copyright (c) 2001-2007 Daniel A. Steffen <das@users.sourceforge.net>
- *
- * 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 1.14.2.11 2007/09/05 01:38:55 das Exp $
- */
- #include "tclInt.h"
- #include "tclPort.h"
- #ifndef MODULE_SCOPE
- #define MODULE_SCOPE extern
- #endif
- #ifndef TCL_DYLD_USE_DLFCN
- /*
- * Use preferred dlfcn API on 10.4 and later
- */
- # if !defined(NO_DLFCN_H) && MAC_OS_X_VERSION_MAX_ALLOWED >= 1040
- # define TCL_DYLD_USE_DLFCN 1
- # else
- # define TCL_DYLD_USE_DLFCN 0
- # endif
- #endif
- #ifndef TCL_DYLD_USE_NSMODULE
- /*
- * Use deprecated NSModule API only to support 10.3 and earlier:
- */
- # if MAC_OS_X_VERSION_MIN_REQUIRED < 1040
- # define TCL_DYLD_USE_NSMODULE 1
- # else
- # define TCL_DYLD_USE_NSMODULE 0
- # endif
- #endif
- #if TCL_DYLD_USE_DLFCN
- #include <dlfcn.h>
- #if defined(HAVE_WEAK_IMPORT) && MAC_OS_X_VERSION_MIN_REQUIRED < 1040
- /*
- * Support for weakly importing dlfcn API.
- */
- extern void *dlopen(const char *path, int mode) WEAK_IMPORT_ATTRIBUTE;
- extern void *dlsym(void *handle, const char *symbol) WEAK_IMPORT_ATTRIBUTE;
- extern int dlclose(void *handle) WEAK_IMPORT_ATTRIBUTE;
- extern char *dlerror(void) WEAK_IMPORT_ATTRIBUTE;
- #endif
- #endif
- #if TCL_DYLD_USE_NSMODULE || defined(TCL_LOAD_FROM_MEMORY)
- #include <mach-o/dyld.h>
- #include <mach-o/fat.h>
- #include <mach-o/swap.h>
- #include <mach-o/arch.h>
- #include <libkern/OSByteOrder.h>
- #undef panic
- #include <mach/mach.h>
- #include <stdbool.h>
- typedef struct Tcl_DyldModuleHandle {
- struct Tcl_DyldModuleHandle *nextPtr;
- NSModule module;
- } Tcl_DyldModuleHandle;
- #endif /* TCL_DYLD_USE_NSMODULE */
- typedef struct Tcl_DyldLoadHandle {
- #if TCL_DYLD_USE_DLFCN
- void *dlHandle;
- #endif
- #if TCL_DYLD_USE_NSMODULE || defined(TCL_LOAD_FROM_MEMORY)
- const struct mach_header *dyldLibHeader;
- Tcl_DyldModuleHandle *modulePtr;
- #endif
- } Tcl_DyldLoadHandle;
- #if (TCL_DYLD_USE_DLFCN && MAC_OS_X_VERSION_MIN_REQUIRED < 1040) ||
- defined(TCL_LOAD_FROM_MEMORY)
- MODULE_SCOPE long tclMacOSXDarwinRelease;
- #endif
- #ifdef TCL_DEBUG_LOAD
- #define TclLoadDbgMsg(m, ...) do {
- fprintf(stderr, "%s:%d: %s(): " m ".n",
- strrchr(__FILE__, '/')+1, __LINE__, __func__, ##__VA_ARGS__);
- } while (0)
- #else
- #define TclLoadDbgMsg(m, ...)
- #endif
- #if TCL_DYLD_USE_NSMODULE || defined(TCL_LOAD_FROM_MEMORY)
- /*
- *----------------------------------------------------------------------
- *
- * DyldOFIErrorMsg --
- *
- * Converts a numerical NSObjectFileImage error into an error message
- * string.
- *
- * Results:
- * Error message string.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
- 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";
- }
- }
- #endif /* TCL_DYLD_USE_NSMODULE */
- /*
- *----------------------------------------------------------------------
- *
- * TclpDlopen --
- *
- * 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.
- *
- * Side effects:
- * New code suddenly appears in memory.
- *
- *----------------------------------------------------------------------
- */
- MODULE_SCOPE int
- TclpDlopen(
- Tcl_Interp *interp, /* Used for error reporting. */
- 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
- * (*unloadProcPtr)() to unload the file. */
- Tcl_FSUnloadFileProc **unloadProcPtr)
- /* Filled with address of Tcl_FSUnloadFileProc
- * function which should be used for this
- * file. */
- {
- Tcl_DyldLoadHandle *dyldLoadHandle;
- #if TCL_DYLD_USE_DLFCN
- void *dlHandle = NULL;
- #endif
- #if TCL_DYLD_USE_NSMODULE || defined(TCL_LOAD_FROM_MEMORY)
- const struct mach_header *dyldLibHeader = NULL;
- Tcl_DyldModuleHandle *modulePtr = NULL;
- #endif
- #if TCL_DYLD_USE_NSMODULE
- NSLinkEditErrors editError;
- int errorNumber;
- const char *errorName, *objFileImageErrMsg = NULL;
- #endif
- const char *errMsg = NULL;
- int result;
- Tcl_DString ds;
- char *fileName = NULL;
- const char *nativePath, *nativeFileName = NULL;
- /*
- * 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.
- */
- nativePath = Tcl_FSGetNativePath(pathPtr);
- #if TCL_DYLD_USE_DLFCN
- #if MAC_OS_X_VERSION_MIN_REQUIRED < 1040
- if (tclMacOSXDarwinRelease >= 8)
- #endif
- {
- dlHandle = dlopen(nativePath, RTLD_NOW | RTLD_LOCAL);
- if (!dlHandle) {
- /*
- * 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.
- */
- fileName = Tcl_GetString(pathPtr);
- nativeFileName = Tcl_UtfToExternalDString(NULL, fileName, -1, &ds);
- dlHandle = dlopen(nativeFileName, RTLD_NOW | RTLD_LOCAL);
- }
- if (dlHandle) {
- TclLoadDbgMsg("dlopen() successful");
- } else {
- errMsg = dlerror();
- TclLoadDbgMsg("dlopen() failed: %s", errMsg);
- }
- }
- if (!dlHandle)
- #endif /* TCL_DYLD_USE_DLFCN */
- {
- #if TCL_DYLD_USE_NSMODULE
- dyldLibHeader = NSAddImage(nativePath,
- NSADDIMAGE_OPTION_RETURN_ON_ERROR);
- if (dyldLibHeader) {
- TclLoadDbgMsg("NSAddImage() successful");
- } else {
- NSLinkEditError(&editError, &errorNumber, &errorName, &errMsg);
- 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.
- */
- if (!fileName) {
- fileName = Tcl_GetString(pathPtr);
- nativeFileName = Tcl_UtfToExternalDString(NULL, fileName,
- -1, &ds);
- }
- dyldLibHeader = NSAddImage(nativeFileName,
- NSADDIMAGE_OPTION_WITH_SEARCHING |
- NSADDIMAGE_OPTION_RETURN_ON_ERROR);
- if (dyldLibHeader) {
- TclLoadDbgMsg("NSAddImage() successful");
- } else {
- NSLinkEditError(&editError, &errorNumber, &errorName,
- &errMsg);
- TclLoadDbgMsg("NSAddImage() failed: %s", errMsg);
- }
- } else if ((editError == NSLinkEditFileFormatError
- && errorNumber == EBADMACHO)
- || editError == NSLinkEditOtherError){
- NSObjectFileImageReturnCode err;
- NSObjectFileImage dyldObjFileImage;
- NSModule module;
- /*
- * The requested file was found but was not of type MH_DYLIB,
- * attempt to load it as a MH_BUNDLE.
- */
- err = NSCreateObjectFileImageFromFile(nativePath,
- &dyldObjFileImage);
- if (err == NSObjectFileImageSuccess && dyldObjFileImage) {
- TclLoadDbgMsg("NSCreateObjectFileImageFromFile() "
- "successful");
- module = NSLinkModule(dyldObjFileImage, nativePath,
- NSLINKMODULE_OPTION_BINDNOW
- | NSLINKMODULE_OPTION_RETURN_ON_ERROR);
- NSDestroyObjectFileImage(dyldObjFileImage);
- if (module) {
- modulePtr = (Tcl_DyldModuleHandle *)
- ckalloc(sizeof(Tcl_DyldModuleHandle));
- modulePtr->module = module;
- modulePtr->nextPtr = NULL;
- TclLoadDbgMsg("NSLinkModule() successful");
- } else {
- NSLinkEditError(&editError, &errorNumber, &errorName,
- &errMsg);
- TclLoadDbgMsg("NSLinkModule() failed: %s", errMsg);
- }
- } else {
- objFileImageErrMsg = DyldOFIErrorMsg(err);
- TclLoadDbgMsg("NSCreateObjectFileImageFromFile() failed: "
- "%s", objFileImageErrMsg);
- }
- }
- }
- #endif /* TCL_DYLD_USE_NSMODULE */
- }
- if (0
- #if TCL_DYLD_USE_DLFCN
- || dlHandle
- #endif
- #if TCL_DYLD_USE_NSMODULE
- || dyldLibHeader || modulePtr
- #endif
- ) {
- dyldLoadHandle = (Tcl_DyldLoadHandle *)
- ckalloc(sizeof(Tcl_DyldLoadHandle));
- #if TCL_DYLD_USE_DLFCN
- dyldLoadHandle->dlHandle = dlHandle;
- #endif
- #if TCL_DYLD_USE_NSMODULE || defined(TCL_LOAD_FROM_MEMORY)
- dyldLoadHandle->dyldLibHeader = dyldLibHeader;
- dyldLoadHandle->modulePtr = modulePtr;
- #endif
- *loadHandle = (Tcl_LoadHandle) dyldLoadHandle;
- *unloadProcPtr = &TclpUnloadFile;
- result = TCL_OK;
- } else {
- Tcl_AppendResult(interp, errMsg, NULL);
- #if TCL_DYLD_USE_NSMODULE
- if (objFileImageErrMsg) {
- Tcl_AppendResult(interp, "nNSCreateObjectFileImageFromFile() "
- "error: ", objFileImageErrMsg, NULL);
- }
- #endif
- result = TCL_ERROR;
- }
- if(fileName) {
- Tcl_DStringFree(&ds);
- }
- return result;
- }
- /*
- *----------------------------------------------------------------------
- *
- * TclpFindSymbol --
- *
- * 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.
- *
- *----------------------------------------------------------------------
- */
- MODULE_SCOPE Tcl_PackageInitProc *
- TclpFindSymbol(
- Tcl_Interp *interp, /* For error reporting. */
- Tcl_LoadHandle loadHandle, /* Handle from TclpDlopen. */
- CONST char *symbol) /* Symbol name to look up. */
- {
- Tcl_DyldLoadHandle *dyldLoadHandle = (Tcl_DyldLoadHandle *) loadHandle;
- Tcl_PackageInitProc *proc = NULL;
- const char *errMsg = NULL;
- Tcl_DString ds;
- const char *native;
- native = Tcl_UtfToExternalDString(NULL, symbol, -1, &ds);
- #if TCL_DYLD_USE_DLFCN
- if (dyldLoadHandle->dlHandle) {
- proc = dlsym(dyldLoadHandle->dlHandle, native);
- if (proc) {
- TclLoadDbgMsg("dlsym() successful");
- } else {
- errMsg = dlerror();
- TclLoadDbgMsg("dlsym() failed: %s", errMsg);
- }
- } else
- #endif /* TCL_DYLD_USE_DLFCN */
- {
- #if TCL_DYLD_USE_NSMODULE || defined(TCL_LOAD_FROM_MEMORY)
- NSSymbol nsSymbol = NULL;
- Tcl_DString newName;
- /*
- * dyld adds an underscore to the beginning of symbol names.
- */
- Tcl_DStringInit(&newName);
- Tcl_DStringAppend(&newName, "_", 1);
- native = Tcl_DStringAppend(&newName, native, -1);
- if (dyldLoadHandle->dyldLibHeader) {
- nsSymbol = NSLookupSymbolInImage(dyldLoadHandle->dyldLibHeader,
- native, NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_NOW |
- NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR);
- if (nsSymbol) {
- TclLoadDbgMsg("NSLookupSymbolInImage() successful");
- #ifdef DYLD_SUPPORTS_DYLIB_UNLOADING
- /*
- * Until dyld supports unloading of MY_DYLIB binaries, the
- * following is not needed.
- */
- 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;
- int errorNumber;
- const char *errorName;
- NSLinkEditError(&editError, &errorNumber, &errorName, &errMsg);
- TclLoadDbgMsg("NSLookupSymbolInImage() failed: %s", errMsg);
- }
- } else if (dyldLoadHandle->modulePtr) {
- nsSymbol = NSLookupSymbolInModule(
- dyldLoadHandle->modulePtr->module, native);
- if (nsSymbol) {
- TclLoadDbgMsg("NSLookupSymbolInModule() successful");
- } else {
- TclLoadDbgMsg("NSLookupSymbolInModule() failed");
- }
- }
- if (nsSymbol) {
- proc = NSAddressOfSymbol(nsSymbol);
- if (proc) {
- TclLoadDbgMsg("NSAddressOfSymbol() successful");
- } else {
- TclLoadDbgMsg("NSAddressOfSymbol() failed");
- }
- }
- Tcl_DStringFree(&newName);
- #endif /* TCL_DYLD_USE_NSMODULE */
- }
- Tcl_DStringFree(&ds);
- if (errMsg) {
- Tcl_AppendResult(interp, errMsg, NULL);
- }
- return proc;
- }
- /*
- *----------------------------------------------------------------------
- *
- * 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.
- *
- * Results:
- * 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.
- *
- *----------------------------------------------------------------------
- */
- MODULE_SCOPE void
- TclpUnloadFile(
- 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;
- #if TCL_DYLD_USE_DLFCN
- if (dyldLoadHandle->dlHandle) {
- int result;
- result = dlclose(dyldLoadHandle->dlHandle);
- if (!result) {
- TclLoadDbgMsg("dlclose() successful");
- } else {
- TclLoadDbgMsg("dlclose() failed: %s", dlerror());
- }
- } else
- #endif /* TCL_DYLD_USE_DLFCN */
- {
- #if TCL_DYLD_USE_NSMODULE || defined(TCL_LOAD_FROM_MEMORY)
- Tcl_DyldModuleHandle *modulePtr = dyldLoadHandle->modulePtr;
- while (modulePtr != NULL) {
- void *ptr;
- bool result;
- result = NSUnLinkModule(modulePtr->module,
- NSUNLINKMODULE_OPTION_RESET_LAZY_REFERENCES);
- if (result) {
- TclLoadDbgMsg("NSUnLinkModule() successful");
- } else {
- TclLoadDbgMsg("NSUnLinkModule() failed");
- }
- ptr = modulePtr;
- modulePtr = modulePtr->nextPtr;
- ckfree(ptr);
- }
- #endif /* TCL_DYLD_USE_NSMODULE */
- }
- ckfree((char*) dyldLoadHandle);
- }
- /*
- *----------------------------------------------------------------------
- *
- * TclGuessPackageName --
- *
- * 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.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
- int
- TclGuessPackageName(
- 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;
- }
- #ifdef TCL_LOAD_FROM_MEMORY
- /*
- *----------------------------------------------------------------------
- *
- * TclpLoadMemoryGetBuffer --
- *
- * Allocate a buffer that can be used with TclpLoadMemory() below.
- *
- * Results:
- * Pointer to allocated buffer or NULL if an error occurs.
- *
- * Side effects:
- * Buffer is allocated.
- *
- *----------------------------------------------------------------------
- */
- MODULE_SCOPE void *
- TclpLoadMemoryGetBuffer(
- Tcl_Interp *interp, /* Used for error reporting. */
- int size) /* Size of desired buffer. */
- {
- void *buffer = NULL;
- /*
- * NSCreateObjectFileImageFromMemory is available but always fails
- * prior to Darwin 7.
- */
- if (tclMacOSXDarwinRelease >= 7) {
- /*
- * 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;
- }
- /*
- *----------------------------------------------------------------------
- *
- * TclpLoadMemory --
- *
- * 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.
- *
- * Side effects:
- * New code is loaded from memory.
- *
- *----------------------------------------------------------------------
- */
- MODULE_SCOPE int
- TclpLoadMemory(
- 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. */
- Tcl_LoadHandle *loadHandle, /* Filled with token for dynamically loaded
- * file which will be passed back to
- * (*unloadProcPtr)() to unload the file. */
- Tcl_FSUnloadFileProc **unloadProcPtr)
- /* Filled with address of Tcl_FSUnloadFileProc
- * function which should be used for this
- * file. */
- {
- Tcl_DyldLoadHandle *dyldLoadHandle;
- 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 = NSObjectFileImageSuccess;
- const struct fat_header *fh = buffer;
- uint32_t ms = 0;
- #ifndef __LP64__
- const struct mach_header *mh = NULL;
- #define mh_size sizeof(struct mach_header)
- #define mh_magic MH_MAGIC
- #define arch_abi 0
- #else
- const struct mach_header_64 *mh = NULL;
- #define mh_size sizeof(struct mach_header_64)
- #define mh_magic MH_MAGIC_64
- #define arch_abi CPU_ARCH_ABI64
- #endif
- if ((size_t) codeSize >= sizeof(struct fat_header)
- && fh->magic == OSSwapHostToBigInt32(FAT_MAGIC)) {
- uint32_t fh_nfat_arch = OSSwapBigToHostInt32(fh->nfat_arch);
- /*
- * Fat binary, try to find mach_header for our architecture
- */
- TclLoadDbgMsg("Fat binary, %d archs", fh_nfat_arch);
- if ((size_t) codeSize >= sizeof(struct fat_header) +
- fh_nfat_arch * sizeof(struct fat_arch)) {
- void *fatarchs = (char*)buffer + sizeof(struct fat_header);
- const NXArchInfo *arch = NXGetLocalArchInfo();
- struct fat_arch *fa;
- if (fh->magic != FAT_MAGIC) {
- swap_fat_arch(fatarchs, fh_nfat_arch, arch->byteorder);
- }
- fa = NXFindBestFatArch(arch->cputype | arch_abi,
- arch->cpusubtype, fatarchs, fh_nfat_arch);
- if (fa) {
- TclLoadDbgMsg("NXFindBestFatArch() successful: "
- "local cputype %d subtype %d, "
- "fat cputype %d subtype %d",
- arch->cputype | arch_abi, arch->cpusubtype,
- fa->cputype, fa->cpusubtype);
- mh = (void*)((char*)buffer + fa->offset);
- ms = fa->size;
- } else {
- TclLoadDbgMsg("NXFindBestFatArch() failed");
- err = NSObjectFileImageInappropriateFile;
- }
- if (fh->magic != FAT_MAGIC) {
- swap_fat_arch(fatarchs, fh_nfat_arch, arch->byteorder);
- }
- } else {
- TclLoadDbgMsg("Fat binary header failure");
- err = NSObjectFileImageInappropriateFile;
- }
- } else {
- /*
- * Thin binary
- */
- TclLoadDbgMsg("Thin binary");
- mh = buffer;
- ms = codeSize;
- }
- if (ms && !(ms >= mh_size && mh->magic == mh_magic &&
- mh->filetype == MH_BUNDLE)) {
- TclLoadDbgMsg("Inappropriate file: magic %x filetype %d",
- mh->magic, mh->filetype);
- err = NSObjectFileImageInappropriateFile;
- }
- if (err == NSObjectFileImageSuccess) {
- err = NSCreateObjectFileImageFromMemory(buffer, codeSize,
- &dyldObjFileImage);
- if (err == NSObjectFileImageSuccess) {
- TclLoadDbgMsg("NSCreateObjectFileImageFromMemory() "
- "successful");
- } else {
- objFileImageErrMsg = DyldOFIErrorMsg(err);
- TclLoadDbgMsg("NSCreateObjectFileImageFromMemory() failed: %s",
- objFileImageErrMsg);
- }
- } else {
- objFileImageErrMsg = DyldOFIErrorMsg(err);
- }
- }
- /*
- * 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, "NSCreateObjectFileImageFromMemory() "
- "error: ", objFileImageErrMsg, NULL);
- }
- return TCL_ERROR;
- }
- /*
- * 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) {
- TclLoadDbgMsg("NSLinkModule() successful");
- } else {
- NSLinkEditErrors editError;
- int errorNumber;
- const char *errorName, *errMsg;
- NSLinkEditError(&editError, &errorNumber, &errorName, &errMsg);
- TclLoadDbgMsg("NSLinkModule() failed: %s", errMsg);
- Tcl_AppendResult(interp, errMsg, 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));
- #if TCL_DYLD_USE_DLFCN
- dyldLoadHandle->dlHandle = NULL;
- #endif
- dyldLoadHandle->dyldLibHeader = NULL;
- dyldLoadHandle->modulePtr = modulePtr;
- *loadHandle = (Tcl_LoadHandle) dyldLoadHandle;
- *unloadProcPtr = &TclpUnloadFile;
- return TCL_OK;
- }
- #endif /* TCL_LOAD_FROM_MEMORY */
- /*
- * Local Variables:
- * mode: c
- * c-basic-offset: 4
- * fill-column: 79
- * End:
- */