diff options
Diffstat (limited to 'tcl8.6/unix/tclLoadDyld.c')
| -rw-r--r-- | tcl8.6/unix/tclLoadDyld.c | 717 |
1 files changed, 0 insertions, 717 deletions
diff --git a/tcl8.6/unix/tclLoadDyld.c b/tcl8.6/unix/tclLoadDyld.c deleted file mode 100644 index 8b7dc58..0000000 --- a/tcl8.6/unix/tclLoadDyld.c +++ /dev/null @@ -1,717 +0,0 @@ -/* - * 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 - * Original version of his file (superseded long ago) provided by - * Wilfredo Sanchez (wsanchez@apple.com).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. - */ - -#include "tclInt.h" - -#ifndef MODULE_SCOPE -# define MODULE_SCOPE extern -#endif - -/* - * Use preferred dlfcn API on 10.4 and later - */ - -#ifndef TCL_DYLD_USE_DLFCN -# ifdef NO_DLFCN_H -# define TCL_DYLD_USE_DLFCN 0 -# else -# define TCL_DYLD_USE_DLFCN 1 -# endif -#endif - -/* - * Use deprecated NSModule API only to support 10.3 and earlier: - */ - -#ifndef TCL_DYLD_USE_NSMODULE -# define TCL_DYLD_USE_NSMODULE 0 -#endif - -/* - * Use includes for the API we're using. - */ - -#if TCL_DYLD_USE_DLFCN -# include <dlfcn.h> -#endif /* TCL_DYLD_USE_DLFCN */ - -#if TCL_DYLD_USE_NSMODULE || defined(TCL_LOAD_FROM_MEMORY) -#pragma GCC diagnostic ignored "-Wdeprecated-declarations" -#include <mach-o/dyld.h> -#include <mach-o/fat.h> -#include <mach-o/swap.h> -#include <mach-o/arch.h> -#include <libkern/OSByteOrder.h> -#include <mach/mach.h> - -typedef struct Tcl_DyldModuleHandle { - struct Tcl_DyldModuleHandle *nextPtr; - NSModule module; -} Tcl_DyldModuleHandle; -#endif /* TCL_DYLD_USE_NSMODULE || TCL_LOAD_FROM_MEMORY */ - -typedef struct { - void *dlHandle; -#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 || defined(TCL_LOAD_FROM_MEMORY) -MODULE_SCOPE long tclMacOSXDarwinRelease; -#endif - -/* - * Static functions defined in this file. - */ - -static void * FindSymbol(Tcl_Interp *interp, - Tcl_LoadHandle loadHandle, const char *symbol); -static void UnloadFile(Tcl_LoadHandle handle); - -/* - *---------------------------------------------------------------------- - * - * DyldOFIErrorMsg -- - * - * Converts a numerical NSObjectFileImage error into an error message - * string. - * - * Results: - * Error message string. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -#if TCL_DYLD_USE_NSMODULE || defined(TCL_LOAD_FROM_MEMORY) -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 || TCL_LOAD_FROM_MEMORY */ - -/* - *---------------------------------------------------------------------- - * - * 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. */ - int flags) -{ - Tcl_DyldLoadHandle *dyldLoadHandle; - Tcl_LoadHandle newHandle; - void *dlHandle = NULL; -#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 /* TCL_DYLD_USE_NSMODULE */ - const char *errMsg = NULL; - int result; - Tcl_DString ds; - const char *nativePath, *nativeFileName = NULL; -#if TCL_DYLD_USE_DLFCN - int dlopenflags = 0; -#endif /* TCL_DYLD_USE_DLFCN */ - - /* - * 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); - nativeFileName = Tcl_UtfToExternalDString(NULL, Tcl_GetString(pathPtr), - -1, &ds); - -#if TCL_DYLD_USE_DLFCN - /* - * Use (RTLD_NOW|RTLD_LOCAL) as default, see [Bug #3216070] - */ - - if (flags & TCL_LOAD_GLOBAL) { - dlopenflags |= RTLD_GLOBAL; - } else { - dlopenflags |= RTLD_LOCAL; - } - if (flags & TCL_LOAD_LAZY) { - dlopenflags |= RTLD_LAZY; - } else { - dlopenflags |= RTLD_NOW; - } - dlHandle = dlopen(nativePath, dlopenflags); - 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. - */ - - dlHandle = dlopen(nativeFileName, dlopenflags); - if (!dlHandle) { - errMsg = dlerror(); - } - } -#endif /* TCL_DYLD_USE_DLFCN */ - - if (!dlHandle) { -#if TCL_DYLD_USE_NSMODULE - dyldLibHeader = NSAddImage(nativePath, - NSADDIMAGE_OPTION_RETURN_ON_ERROR); - if (!dyldLibHeader) { - 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. - */ - - dyldLibHeader = NSAddImage(nativeFileName, - NSADDIMAGE_OPTION_WITH_SEARCHING | - NSADDIMAGE_OPTION_RETURN_ON_ERROR); - if (!dyldLibHeader) { - NSLinkEditError(&editError, &errorNumber, &errorName, - &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) { - int nsflags = NSLINKMODULE_OPTION_RETURN_ON_ERROR; - if (!(flags & 1)) nsflags |= NSLINKMODULE_OPTION_PRIVATE; - if (!(flags & 2)) nsflags |= NSLINKMODULE_OPTION_BINDNOW; - module = NSLinkModule(dyldObjFileImage, nativePath, nsflags); - NSDestroyObjectFileImage(dyldObjFileImage); - if (module) { - modulePtr = ckalloc(sizeof(Tcl_DyldModuleHandle)); - modulePtr->module = module; - modulePtr->nextPtr = NULL; - } else { - NSLinkEditError(&editError, &errorNumber, &errorName, - &errMsg); - } - } else { - objFileImageErrMsg = DyldOFIErrorMsg(err); - } - } - } -#endif /* TCL_DYLD_USE_NSMODULE */ - } - - if (dlHandle -#if TCL_DYLD_USE_NSMODULE - || dyldLibHeader || modulePtr -#endif /* TCL_DYLD_USE_NSMODULE */ - ) { - dyldLoadHandle = ckalloc(sizeof(Tcl_DyldLoadHandle)); - dyldLoadHandle->dlHandle = dlHandle; -#if TCL_DYLD_USE_NSMODULE || defined(TCL_LOAD_FROM_MEMORY) - dyldLoadHandle->dyldLibHeader = dyldLibHeader; - dyldLoadHandle->modulePtr = modulePtr; -#endif /* TCL_DYLD_USE_NSMODULE || TCL_LOAD_FROM_MEMORY */ - newHandle = ckalloc(sizeof(*newHandle)); - newHandle->clientData = dyldLoadHandle; - newHandle->findSymbolProcPtr = &FindSymbol; - newHandle->unloadFileProcPtr = &UnloadFile; - *unloadProcPtr = &UnloadFile; - *loadHandle = newHandle; - result = TCL_OK; - } else { - Tcl_Obj *errObj = Tcl_NewObj(); - - if (errMsg != NULL) { - Tcl_AppendToObj(errObj, errMsg, -1); - } -#if TCL_DYLD_USE_NSMODULE - if (objFileImageErrMsg) { - Tcl_AppendPrintfToObj(errObj, - "\nNSCreateObjectFileImageFromFile() error: %s", - objFileImageErrMsg); - } -#endif /* TCL_DYLD_USE_NSMODULE */ - Tcl_SetObjResult(interp, errObj); - result = TCL_ERROR; - } - - Tcl_DStringFree(&ds); - return result; -} - -/* - *---------------------------------------------------------------------- - * - * FindSymbol -- - * - * 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. - * - *---------------------------------------------------------------------- - */ - -static void * -FindSymbol( - Tcl_Interp *interp, /* For error reporting. */ - Tcl_LoadHandle loadHandle, /* Handle from TclpDlopen. */ - const char *symbol) /* Symbol name to look up. */ -{ - Tcl_DyldLoadHandle *dyldLoadHandle = loadHandle->clientData; - Tcl_PackageInitProc *proc = NULL; - const char *errMsg = NULL; - Tcl_DString ds; - const char *native; - - native = Tcl_UtfToExternalDString(NULL, symbol, -1, &ds); - if (dyldLoadHandle->dlHandle) { -#if TCL_DYLD_USE_DLFCN - proc = dlsym(dyldLoadHandle->dlHandle, native); - if (!proc) { - errMsg = dlerror(); - } -#endif /* TCL_DYLD_USE_DLFCN */ - } else { -#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); - TclDStringAppendLiteral(&newName, "_"); - 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) { - /* - * Until dyld supports unloading of MY_DYLIB binaries, the - * following is not needed. - */ - -#ifdef DYLD_SUPPORTS_DYLIB_UNLOADING - NSModule module = NSModuleForSymbol(nsSymbol); - Tcl_DyldModuleHandle *modulePtr = dyldLoadHandle->modulePtr; - - while (modulePtr != NULL) { - if (module == modulePtr->module) { - break; - } - modulePtr = modulePtr->nextPtr; - } - if (modulePtr == NULL) { - modulePtr = 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); - } - } else if (dyldLoadHandle->modulePtr) { - nsSymbol = NSLookupSymbolInModule( - dyldLoadHandle->modulePtr->module, native); - } - if (nsSymbol) { - proc = NSAddressOfSymbol(nsSymbol); - } - Tcl_DStringFree(&newName); -#endif /* TCL_DYLD_USE_NSMODULE */ - } - Tcl_DStringFree(&ds); - if (errMsg && (interp != NULL)) { - Tcl_SetObjResult(interp, Tcl_ObjPrintf( - "cannot find symbol \"%s\": %s", symbol, errMsg)); - Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "LOAD_SYMBOL", symbol, - NULL); - } - return proc; -} - -/* - *---------------------------------------------------------------------- - * - * UnloadFile -- - * - * 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. - * - *---------------------------------------------------------------------- - */ - -static void -UnloadFile( - Tcl_LoadHandle loadHandle) /* loadHandle returned by a previous call to - * TclpDlopen(). The loadHandle is a token - * that represents the loaded file. */ -{ - Tcl_DyldLoadHandle *dyldLoadHandle = loadHandle->clientData; - - if (dyldLoadHandle->dlHandle) { -#if TCL_DYLD_USE_DLFCN - (void) dlclose(dyldLoadHandle->dlHandle); -#endif /* TCL_DYLD_USE_DLFCN */ - } else { -#if TCL_DYLD_USE_NSMODULE || defined(TCL_LOAD_FROM_MEMORY) - Tcl_DyldModuleHandle *modulePtr = dyldLoadHandle->modulePtr; - - while (modulePtr != NULL) { - void *ptr = modulePtr; - - (void) NSUnLinkModule(modulePtr->module, - NSUNLINKMODULE_OPTION_RESET_LAZY_REFERENCES); - modulePtr = modulePtr->nextPtr; - ckfree(ptr); - } -#endif /* TCL_DYLD_USE_NSMODULE */ - } - ckfree(dyldLoadHandle); - ckfree(loadHandle); -} - -/* - *---------------------------------------------------------------------- - * - * 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; -} - -/* - *---------------------------------------------------------------------- - * - * 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. - * - *---------------------------------------------------------------------- - */ - -#ifdef TCL_LOAD_FROM_MEMORY -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; -} -#endif /* TCL_LOAD_FROM_MEMORY */ - -/* - *---------------------------------------------------------------------- - * - * 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. - * - *---------------------------------------------------------------------- - */ - -#ifdef TCL_LOAD_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. */ - int flags) -{ - Tcl_LoadHandle newHandle; - Tcl_DyldLoadHandle *dyldLoadHandle; - NSObjectFileImage dyldObjFileImage = NULL; - Tcl_DyldModuleHandle *modulePtr; - NSModule module; - const char *objFileImageErrMsg = NULL; - int nsflags = NSLINKMODULE_OPTION_RETURN_ON_ERROR; - - /* - * 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 /* __LP64__ */ - - 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 - */ - - 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) { - mh = (void *)((char *) buffer + fa->offset); - ms = fa->size; - } else { - err = NSObjectFileImageInappropriateFile; - } - if (fh->magic != FAT_MAGIC) { - swap_fat_arch(fatarchs, fh_nfat_arch, arch->byteorder); - } - } else { - err = NSObjectFileImageInappropriateFile; - } - } else { - /* - * Thin binary - */ - - mh = buffer; - ms = codeSize; - } - if (ms && !(ms >= mh_size && mh->magic == mh_magic && - mh->filetype == MH_BUNDLE)) { - err = NSObjectFileImageInappropriateFile; - } - if (err == NSObjectFileImageSuccess) { - err = NSCreateObjectFileImageFromMemory(buffer, codeSize, - &dyldObjFileImage); - if (err != NSObjectFileImageSuccess) { - objFileImageErrMsg = DyldOFIErrorMsg(err); - } - } 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_SetObjResult(interp, Tcl_ObjPrintf( - "NSCreateObjectFileImageFromMemory() error: %s", - objFileImageErrMsg)); - } - return TCL_ERROR; - } - - /* - * Extract the module we want from the image of the object file. - */ - - if (!(flags & 1)) nsflags |= NSLINKMODULE_OPTION_PRIVATE; - if (!(flags & 2)) nsflags |= NSLINKMODULE_OPTION_BINDNOW; - module = NSLinkModule(dyldObjFileImage, "[Memory Based Bundle]", nsflags); - NSDestroyObjectFileImage(dyldObjFileImage); - if (!module) { - NSLinkEditErrors editError; - int errorNumber; - const char *errorName, *errMsg; - - NSLinkEditError(&editError, &errorNumber, &errorName, &errMsg); - Tcl_SetObjResult(interp, Tcl_NewStringObj(errMsg, -1)); - return TCL_ERROR; - } - - /* - * Stash the module reference within the load handle we create and return. - */ - - modulePtr = ckalloc(sizeof(Tcl_DyldModuleHandle)); - modulePtr->module = module; - modulePtr->nextPtr = NULL; - dyldLoadHandle = ckalloc(sizeof(Tcl_DyldLoadHandle)); - dyldLoadHandle->dlHandle = NULL; - dyldLoadHandle->dyldLibHeader = NULL; - dyldLoadHandle->modulePtr = modulePtr; - newHandle = ckalloc(sizeof(*newHandle)); - newHandle->clientData = dyldLoadHandle; - newHandle->findSymbolProcPtr = &FindSymbol; - newHandle->unloadFileProcPtr = &UnloadFile; - *loadHandle = newHandle; - *unloadProcPtr = &UnloadFile; - return TCL_OK; -} -#endif /* TCL_LOAD_FROM_MEMORY */ - -/* - * Local Variables: - * mode: c - * c-basic-offset: 4 - * fill-column: 79 - * End: - */ |