Download E-books Mac OS X and iOS Internals: To the Apple's Core PDF

By Jonathan Levin

An in-depth investigate Mac OS X and iOS kernels

Powering Macs, iPhones, iPads and extra, OS X and iOS have gotten ubiquitous. by way of documentation, even if, a lot of them are shrouded in secret. Cocoa and Carbon, the applying frameworks, are smartly defined, yet approach programmers locate the remaining missing. This essential advisor illuminates the darkest corners of these structures, beginning with an architectural evaluation, then drilling all of the strategy to the core.

  • Provides you with a most sensible down view of OS X and iOS
  • Walks you thru the stages of approach startup—both Mac (EFi) and cellular (iBoot)
  • Explains how procedures, threads, digital reminiscence, and filesystems are maintained
  • Covers the protection architecture
  • Reviews the interior Apis utilized by the system—BSD and Mach
  • Dissects the kernel, XNU, into its sub parts: Mach, the BSD Layer, and I/o package, and explains every one in detail
  • Explains the interior workings of machine drivers

From structure to implementation, this e-book is vital analyzing in an effort to get desirous about the inner workings of Mac OS X and iOS.

Show description

Read or Download Mac OS X and iOS Internals: To the Apple's Core PDF

Similar Technology books

Systems Programming: Designing and Developing Distributed Applications

Structures Programming: Designing and constructing disbursed purposes explains how the advance of allotted purposes depends upon a foundational realizing of the connection between working structures, networking, allotted structures, and programming. Uniquely geared up round 4 viewpoints (process, verbal exchange, source, and architecture), the basic and crucial features of disbursed structures are explored in methods which minimize around the numerous conventional topic zone barriers.

Superconductivity: A Very Short Introduction

Superconductivity--the circulation of electrical present with no resistance in sure fabrics as temperatures close to absolute zero--is one of many maximum discoveries of twentieth century physics, however it can appear impenetrable to people who lack an exceptional clinical history. Outlining the attention-grabbing background of ways superconductivity used to be stumbled on, and the race to appreciate its many mysterious and counter-intuitive phenomena, Stephen Blundell explains in obtainable phrases the theories which have been constructed to provide an explanation for it, and the way they've got encouraged different parts of technology, together with the Higgs boson of particle physics and concepts in regards to the early Universe.

The Social Construction of Technological Systems: New Directions in the Sociology and History of Technology (MIT Press)

This pioneering ebook, first released in 1987, introduced the recent box of social stories of know-how. It brought a mode of inquiry--social development of expertise, or SCOT--that turned a key a part of the broader self-discipline of technology and know-how reports. The booklet helped the MIT Press form its STS checklist and encouraged the interior know-how sequence.

Always On: How the iPhone Unlocked the Anything-Anytime-Anywhere Future--and Locked Us In

Even Steve Jobs did not comprehend what he had on his fingers while he introduced the unique iPhone as a mixture of an insignificant "three innovative products"--an iPod, a mobile phone, and a keyboard-less hand held laptop. as soon as Apple brought the App shop and opened it as much as open air builders, although, the iPhone grew to become in a position to serving a swiftly starting to be variety of functions--now greater than 200,000 and counting.

Extra resources for Mac OS X and iOS Internals: To the Apple's Core

Show sample text content

Failure to unravel symbols for that reason might bring about a failure to execute this system (usually within the type of a debugger trap). against this, a vulnerable image — that may be outlined via specifying __attribute__((weak_import) in its assertion — doesn't reason a failure in software linkage if it can't be resolved. quite, the dynamic linker units it to NULL, permitting the programmer to get well and specify a few substitute good judgment to deal with the situation. this is often just like the modus operandi utilized in dynamic loading (the related impact as dlopen(3) or dlsym(3) returning NULL). utilizing nm with the –m change will demonstrate susceptible symbols with a “weak” specifier. dyld beneficial properties Being a proprietary loader, dyld deals a few specified beneficial properties, which different loaders can simply envy. This part discusses many of the priceless ones. Two-Level Namespace in contrast to the normal UN*X ld, OS X's dyld activities a two-level namespace. this selection, brought in 10. 1, implies that image names additionally comprise their library details. This method is best, because it makes it possible for diversified libraries to export a similar image — which might bring about hyperlink mistakes in different UN*X. every now and then, it can be fascinating to take away this habit, limiting a flat namespace (for instance, in an effort to inject a distinct library, with an analogous image identify, regularly for functionality hooking). this is finished by way of environment the DYLD_FORCE_FLAT_NAMESPACE atmosphere variable to a non-zero variable. An executable can also strength a flat namespace on all its loaded libraries via atmosphere the MH_FORCE_FLAT flag in its header. functionality Interposing one other function of dyld that won't within the vintage ld is functionality interposing. The macro DYLD_INTERPOSE permits a library to interpose (read: swap) its functionality implementation for another functionality. The snippet in directory 4-4, from the resource of dyld, demonstrates this: directory 4-4: DYLD_INTERPOSE macro definition in dyld's include/mach-o/dyld-interposing. h #if ! defined(_DYLD_INTERPOSING_H_) #define _DYLD_INTERPOSING_H_ /* instance: * static * int * my_open(const char* direction, int flags, mode_t mode) * { * int worth; * // do stuff ahead of open (including altering the arguments) * price = open(path, flags, mode); * // do stuff after open (including altering the go back value(s)) * go back worth; * } * DYLD_INTERPOSE(my_open, open) */ #define DYLD_INTERPOSE(_replacment,_replacee) \ __attribute__((used)) static struct{ const void* replacment; const void* replacee; } _interpose_##_replacee \ __attribute__ ((section (”__DATA,__interpose”))) = { (const void*)(unsigned long)&_replacment, (const void*)(unsigned long)&_replacee }; #endif Interposing easily involves delivering a brand new __DATA part, referred to as __interpose, during which the interposing and the interposed are indexed, back-to-back. The dyld looks after all of the relaxation. a very good instance of a library that makes use of interposing is OS X's GuardMalloc library (a. ok. a /usr/lib/libgmalloc. dylib). This library replaces malloc()-related performance in libSystem.

Rated 4.08 of 5 – based on 29 votes