machbytype, machbyname – machine-independent access to executables
void machbytype(int type)
int machbyname(char *name)
extern Mach *mach;
Libmach provides an interface for accessing the executable files
and executing images of various architectures and operating systems.
The interface is machine-independent, meaning that, for example,
Mac OS X core dumps may be inspected using an x86 Linux machine
and vice versa. In its current form, the library is mainly useful
debuggers of one sort or another.
An architecture is described primarily by a Mach structure, which
contains data structures and parameters describing the particular
architecture. Most library functions assume that the global variable
mach points at the structure for the architecture being debugged.
It is set implicitly by crackhdr (see mach-file(3)) and can be
set explicitly by calling
machbyname or machbytype.
There is no operating system-specific structure akin to mach.
Typically the choice of operating system on a particular architecture
affects only the executable and core dump formats; the various
file parsers deduce the operating system from information in the
binary files themselves and adjust accordingly.
The supported architectures are 386 (Intel 32-bit x86) 386 and
later) and power (IBM PowerPC, typically running Mac OS X).
Other manual pages describe the library functions in detail.
Mach-cmd(3) describes some convenience routines for attaching
to processes and core files.
Mach-file(3) describes the manipulation of binary files.
Mach-map(3) describes the interface to address spaces and register
sets in executable files and executing programs.
Mach-stack(3) describes support for unwinding the stack.
Mach-swap(3) describes helper functions for accessing data in
a particular byte order.
Mach-symbol(3) describes the interface to debugging symbol information.|