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+/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
+ *
+ * Copyright (c) 2004-2005 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <mach-o/loader.h>
+
+#include <vector>
+
+#include "mach-o/dyld_gdb.h"
+#include "mach-o/dyld_images.h"
+
+#define OLD_GDB_DYLD_INTERFACE __ppc__ || __i386__
+
+// old gdb interface to dyld only supported on 32-bit ppc and i386
+#if OLD_GDB_DYLD_INTERFACE
+
+unsigned int gdb_dyld_version = 2;
+
+
+/*
+ * gdb_dyld_state_changed() is a dummy routine called by dyld after images get
+ * added or removed/ Gdb is expected to set a break point at
+ * gdb_dyld_state_changed() then re-read dyld internal data as specified in
+ * the header file dyld_gdb.h
+ */
+void gdb_dyld_state_changed()
+{
+ // do nothing
+}
+
+#define NLIBRARY_IMAGES 200
+#define NOBJECT_IMAGES 1
+
+
+struct image {
+ const char* physical_name; // physical image name (file name)
+ uint32_t vmaddr_slide; // the slide from the staticly linked address
+ const mach_header* mh; // address of the mach header of the image
+ uint32_t valid; // TRUE if this is struct is valid
+ const char* name; // image name for reporting errors
+};
+
+
+struct library_images {
+ struct image images[NLIBRARY_IMAGES];
+ uint32_t nimages;
+ struct library_images* next_images;
+};
+struct object_images {
+ struct image images[NOBJECT_IMAGES];
+ uint32_t nimages;
+ struct library_images* next_images;
+};
+
+unsigned int gdb_nobject_images = NOBJECT_IMAGES;
+unsigned int gdb_object_image_size = sizeof(image);
+unsigned int gdb_nlibrary_images = NLIBRARY_IMAGES;
+unsigned int gdb_library_image_size = sizeof(image);
+
+extern "C" {
+object_images object_images;// = { {}, 0 , NULL };
+library_images library_images;// = { {}, 0 , NULL };
+void send_event(const struct dyld_event* event);
+}
+
+
+enum dyld_event_type {
+ DYLD_IMAGE_ADDED = 0,
+ DYLD_IMAGE_REMOVED = 5
+};
+
+struct dyld_event {
+ enum dyld_event_type type;
+ const struct mach_header* header;
+ uintptr_t slide;
+};
+
+
+// gdb only notices changes bundles/dylibs loaded at runtime
+// if the "send_event()" function in dyld is called...
+void send_event(const struct dyld_event* event);
+void (*send_event_ptr)(const struct dyld_event* event) = &send_event;
+
+void addImageForgdb(const mach_header* mh, uintptr_t slide, const char* physicalPath, const char* logicalPath)
+{
+ struct library_images* li = &library_images;
+ while ( li->nimages >= NLIBRARY_IMAGES ) {
+ if ( li->next_images == NULL ) {
+ struct library_images* li2 = new struct library_images();
+ li2->nimages = 0;
+ li2->next_images = NULL;
+ li->next_images = li2;
+ li = li2;
+ }
+ else {
+ li = li->next_images;
+ }
+ }
+ image* info = &li->images[li->nimages++];
+ info->physical_name = physicalPath;
+ info->vmaddr_slide = slide;
+ info->mh = mh;
+ info->valid = 1;
+ info->name = logicalPath;
+
+ // ping gdb about change
+ dyld_event event;
+ event.type = DYLD_IMAGE_ADDED;
+ event.header = mh;
+ event.slide = slide;
+
+ // we have to indirect through a function pointer to keep gcc-3.5 from inlining away the function call
+ // rdar://problem/3830560
+ (*send_event_ptr)(&event);
+}
+
+// move this to after use, otherwise gcc will see it has an empty implementation and
+// optimize away the call site
+void send_event(const struct dyld_event* event)
+{
+ // This function exists to let gdb set a break point
+ // and catch libraries being added...
+}
+
+
+void removeImageForgdb(const mach_header* mh)
+{
+ for (struct library_images* li = &library_images; li != NULL; li = li->next_images) {
+ for( uint32_t n=0; n < li->nimages; ++n) {
+ struct image* image = &li->images[n];
+ if ( image->mh == mh ) {
+ image->physical_name = NULL;
+ image->vmaddr_slide = 0;
+ image->mh = 0;
+ image->valid = 0;
+ image->name = NULL;
+ return;
+ }
+ }
+ }
+}
+
+#endif
+
+static std::vector<dyld_image_info> sImageInfos;
+
+
+
+void addImagesToAllImages(uint32_t infoCount, const dyld_image_info info[])
+{
+ // make initial size large enought that we probably won't need to re-alloc it
+ if ( sImageInfos.size() == 0 )
+ sImageInfos.reserve(200);
+
+ // set infoArray to NULL to denote it is in-use
+ dyld_all_image_infos.infoArray = NULL;
+
+ // append all new images
+ for (uint32_t i=0; i < infoCount; ++i)
+ sImageInfos.push_back(info[i]);
+ dyld_all_image_infos.infoArrayCount = sImageInfos.size();
+
+ // set infoArray back to base address of vector
+ dyld_all_image_infos.infoArray = &sImageInfos[0];
+
+ // tell gdb that about the new images
+ dyld_all_image_infos.notification(dyld_image_adding, infoCount, info);
+}
+
+void removeImageFromAllImages(const struct mach_header* loadAddress)
+{
+ dyld_image_info goingAway;
+
+ // set infoArray to NULL to denote it is in-use
+ dyld_all_image_infos.infoArray = NULL;
+
+ // remove image from infoArray
+ for (std::vector<dyld_image_info>::iterator it=sImageInfos.begin(); it != sImageInfos.end(); it++) {
+ if ( it->imageLoadAddress == loadAddress ) {
+ goingAway = *it;
+ sImageInfos.erase(it);
+ break;
+ }
+ }
+ dyld_all_image_infos.infoArrayCount = sImageInfos.size();
+
+ // set infoArray back to base address of vector
+ dyld_all_image_infos.infoArray = &sImageInfos[0];
+
+ // tell gdb that about the new images
+ dyld_all_image_infos.notification(dyld_image_removing, 1, &goingAway);
+}
+
+
+static void gdb_image_notifier(enum dyld_image_mode mode, uint32_t infoCount, const dyld_image_info info[])
+{
+ // do nothing
+ // gdb sets a break point here to catch notifications
+ //dyld::log("dyld: gdb_image_notifier(%s, %d, ...)\n", mode ? "dyld_image_removing" : "dyld_image_adding", infoCount);
+ //for (uint32_t i=0; i < infoCount; ++i)
+ // dyld::log("dyld: %d loading at %p %s\n", i, info[i].imageLoadAddress, info[i].imageFilePath);
+ //for (uint32_t i=0; i < dyld_all_image_infos.infoArrayCount; ++i)
+ // dyld::log("dyld: %d loading at %p %s\n", i, dyld_all_image_infos.infoArray[i].imageLoadAddress, dyld_all_image_infos.infoArray[i].imageFilePath);
+}
+
+
+
+struct dyld_all_image_infos dyld_all_image_infos = { 1, 0, NULL, &gdb_image_notifier, false };
+
+struct dyld_shared_cache_ranges dyld_shared_cache_ranges;
+
+