private method that handles circular dependencies by only search any image once

** Try to find a perfect hash function. ** Return the successful initializer for the initial hash. ** Return 0 if no perfect hash could be found. *

test that calls to resolver based function in same dylib work

hmm. maybe this should be up in ImageLoader??

Look for a special segment in the mach header. Its presences means that the binary wants to have DYLD ignore DYLD_ environment variables.

returns if 'addr' is within the address range of section 'sectionIndex' fSlide is not used. 'addr' is assumed to be a prebound address in this image

For duplicate class names: clsOffset = count<<1 | 1 duplicated classes are duplicateOffsets[hiOffset..hiOffset+count-1]

如果指定了DYLD_ROOT_PATH，先从这里加载 try root substitutions

try search overrides and fallbacks

open or check existing

map in file and instantiate an ImageLoader 从文件句柄加载

* We have our own localtime() to avoid needing the notify API which is used * by the code in libc.a for localtime() which is used by arc4random(). *

* names_match() takes an install_name from an LC_LOAD_DYLIB command and a * libraryName (which is -lx or -framework Foo argument passed to the static

处理其他load command