mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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133 lines
4.3 KiB
C++
133 lines
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include <AvailabilityMacros.h>
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#include <mach-o/loader.h>
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#include <mach-o/dyld_images.h>
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#include <mach/task_info.h>
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#include <mach/task.h>
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#include <mach/mach_init.h>
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#include <mach/mach_traps.h>
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#include <string.h>
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#include <stdlib.h>
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#include <vector>
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#include <sstream>
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#include "shared-libraries.h"
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#ifndef MAC_OS_X_VERSION_10_6
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#define MAC_OS_X_VERSION_10_6 1060
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#endif
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#if MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_6
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// borrowed from Breakpad
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// Fallback declarations for TASK_DYLD_INFO and friends, introduced in
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// <mach/task_info.h> in the Mac OS X 10.6 SDK.
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#define TASK_DYLD_INFO 17
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struct task_dyld_info {
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mach_vm_address_t all_image_info_addr;
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mach_vm_size_t all_image_info_size;
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};
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typedef struct task_dyld_info task_dyld_info_data_t;
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typedef struct task_dyld_info *task_dyld_info_t;
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#define TASK_DYLD_INFO_COUNT (sizeof(task_dyld_info_data_t) / sizeof(natural_t))
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#endif
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// Architecture specific abstraction.
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#ifdef __i386__
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typedef mach_header platform_mach_header;
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typedef segment_command mach_segment_command_type;
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#define MACHO_MAGIC_NUMBER MH_MAGIC
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#define CMD_SEGMENT LC_SEGMENT
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#define seg_size uint32_t
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#else
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typedef mach_header_64 platform_mach_header;
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typedef segment_command_64 mach_segment_command_type;
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#define MACHO_MAGIC_NUMBER MH_MAGIC_64
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#define CMD_SEGMENT LC_SEGMENT_64
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#define seg_size uint64_t
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#endif
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static
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void addSharedLibrary(const platform_mach_header* header, char *name, SharedLibraryInfo &info) {
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const struct load_command *cmd =
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reinterpret_cast<const struct load_command *>(header + 1);
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seg_size size = 0;
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unsigned long long start = reinterpret_cast<unsigned long long>(header);
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// Find the cmd segment in the macho image. It will contain the offset we care about.
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const uint8_t *uuid_bytes = nullptr;
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for (unsigned int i = 0;
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cmd && (i < header->ncmds) && (uuid_bytes == nullptr || size == 0);
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++i) {
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if (cmd->cmd == CMD_SEGMENT) {
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const mach_segment_command_type *seg =
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reinterpret_cast<const mach_segment_command_type *>(cmd);
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if (!strcmp(seg->segname, "__TEXT")) {
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size = seg->vmsize;
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}
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} else if (cmd->cmd == LC_UUID) {
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const uuid_command *ucmd = reinterpret_cast<const uuid_command *>(cmd);
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uuid_bytes = ucmd->uuid;
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}
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cmd = reinterpret_cast<const struct load_command *>
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(reinterpret_cast<const char *>(cmd) + cmd->cmdsize);
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}
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std::stringstream uuid;
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uuid << std::hex << std::uppercase;
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if (uuid_bytes != nullptr) {
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for (int i = 0; i < 16; ++i) {
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uuid << ((uuid_bytes[i] & 0xf0) >> 4);
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uuid << (uuid_bytes[i] & 0xf);
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}
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uuid << '0';
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}
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info.AddSharedLibrary(SharedLibrary(start, start + size, 0, uuid.str(),
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name));
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}
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// Use dyld to inspect the macho image information. We can build the SharedLibraryEntry structure
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// giving us roughtly the same info as /proc/PID/maps in Linux.
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SharedLibraryInfo SharedLibraryInfo::GetInfoForSelf()
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{
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SharedLibraryInfo sharedLibraryInfo;
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task_dyld_info_data_t task_dyld_info;
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mach_msg_type_number_t count = TASK_DYLD_INFO_COUNT;
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if (task_info(mach_task_self (), TASK_DYLD_INFO, (task_info_t)&task_dyld_info,
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&count) != KERN_SUCCESS) {
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return sharedLibraryInfo;
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}
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struct dyld_all_image_infos* aii = (struct dyld_all_image_infos*)task_dyld_info.all_image_info_addr;
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size_t infoCount = aii->infoArrayCount;
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// Iterate through all dyld images (loaded libraries) to get their names
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// and offests.
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for (size_t i = 0; i < infoCount; ++i) {
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const dyld_image_info *info = &aii->infoArray[i];
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// If the magic number doesn't match then go no further
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// since we're not pointing to where we think we are.
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if (info->imageLoadAddress->magic != MACHO_MAGIC_NUMBER) {
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continue;
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}
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const platform_mach_header* header =
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reinterpret_cast<const platform_mach_header*>(info->imageLoadAddress);
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// Add the entry for this image.
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addSharedLibrary(header, (char*)info->imageFilePath, sharedLibraryInfo);
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}
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return sharedLibraryInfo;
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}
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