ARCH(3) BSD Library Functions Manual ARCH(3)NAME
NXGetAllArchInfos, NXGetLocalArchInfo, NXGetArchInfoFromName,
NXGetArchInfoFromCpuType, NXFindBestFatArch, NXCombineCpuSubtypes — get
architecture information
SYNOPSIS
#include <mach-o/arch.h>
extern const NXArchInfo *
NXGetAllArchInfos(void);
extern const NXArchInfo *
NXGetLocalArchInfo(void);
extern const NXArchInfo *
NXGetArchInfoFromName(const char *name);
extern const NXArchInfo *
NXGetArchInfoFromCpuType(cpu_type_t cputype, cpu_subtype_t cpusubtype);
extern struct fat_arch *
NXFindBestFatArch(cpu_type_t cputype, cpu_subtype_t cpusubtype,
struct fat_arch *fat_archs, uint32_t nfat_archs);
extern cpu_subtype_t
NXCombineCpuSubtypes(cpu_type_t cputype, cpu_subtype_t cpusubtype1,
cpu_subtype_t cpusubtype2);
DESCRIPTION
These functions are intended for use in programs that have to deal with
universal files or programs that can target multiple architectures. Typ‐
ically, a program will use a command-line argument that starts with
“-arch name”, where this specifies an architecture. These functions and
data structures provide some help for processing architecture flags and
then processing the contents of a universal file.
The structure NXArchInfo is defined in ⟨mach-o/arch.h⟩:
typedef struct {
const char *name;
cpu_type_t cputype;
cpu_subtype_t cpusubtype;
enum NXByteOrder byteorder;
const char *description;
} NXArchInfo;
It is used to hold the name of the architecture and the corresponding CPU
type and CPU subtype, together with the architecture's byte order and a
brief description string.
The currently known architectures are:
Name CPU Type CPU Subtype Description
x86_64 CPU_TYPE_X86_64 CPU_SUBTYPE_X86_64_ALL Intel
x86-64
i386 CPU_TYPE_I386 CPU_SUBTYPE_I386_ALL Intel 80x86
arm CPU_TYPE_ARM CPU_SUBTYPE_ARM_ALL ARM
arm64 CPU_TYPE_ARM64 CPU_SUBTYPE_ARM64_ALL ARM64
ppc CPU_TYPE_POWERPC CPU_SUBTYPE_POWERPC_ALL PowerPC
ppc64 CPU_TYPE_POWERPC64 CPU_SUBTYPE_POWERPC64_ALL PowerPC
64-bit
m68k CPU_TYPE_MC680x0 CPU_SUBTYPE_MC680x0_ALL Motorola
68K
hppa CPU_TYPE_HPPA CPU_SUBTYPE_HPPA_ALL HP-PA
i860 CPU_TYPE_I860 CPU_SUBTYPE_I860_ALL Intel 860
m88k CPU_TYPE_MC88000 CPU_SUBTYPE_MC88000_ALL Motorola
88K
sparc CPU_TYPE_SPARC CPU_SUBTYPE_SPARC_ALL SPARC
i486 CPU_TYPE_I386 CPU_SUBTYPE_486 Intel 486
i486SX CPU_TYPE_I386 CPU_SUBTYPE_486SX Intel 486SX
pentium CPU_TYPE_I386 CPU_SUBTYPE_PENT Intel
Pentium
i586 CPU_TYPE_I386 CPU_SUBTYPE_586 Intel 586
pentpro CPU_TYPE_I386 CPU_SUBTYPE_PENTPRO Intel
Pentium Pro
i686 CPU_TYPE_I386 CPU_SUBTYPE_PENTPRO Intel
Pentium Pro
pentIIm3 CPU_TYPE_I386 CPU_SUBTYPE_PENTII_M3 Intel
Pentium II
Model 3
pentIIm5 CPU_TYPE_I386 CPU_SUBTYPE_PENTII_M5 Intel
Pentium II
Model 5
pentium4 CPU_TYPE_I386 CPU_SUBTYPE_PENTIUM_4 Intel
Pentium 4
armv4t CPU_TYPE_ARM CPU_SUBTYPE_ARM_V4T arm v4t
armv5 CPU_TYPE_ARM CPU_SUBTYPE_ARM_V5TEJ arm v5
xscale CPU_TYPE_ARM CPU_SUBTYPE_ARM_XSCALE arm xscale
armv6 CPU_TYPE_ARM CPU_SUBTYPE_ARM_V6 arm v6
armv6m CPU_TYPE_ARM CPU_SUBTYPE_ARM_V6M arm v6m
armv7 CPU_TYPE_ARM CPU_SUBTYPE_ARM_V7 arm v7
armv7f CPU_TYPE_ARM CPU_SUBTYPE_ARM_V7F arm v7f
armv7s CPU_TYPE_ARM CPU_SUBTYPE_ARM_V7S arm v7s
armv7k CPU_TYPE_ARM CPU_SUBTYPE_ARM_V7K arm v7k
armv7m CPU_TYPE_ARM CPU_SUBTYPE_ARM_V7M arm v7m
armv7em CPU_TYPE_ARM CPU_SUBTYPE_ARM_V7EM arm v7em
armv8 CPU_TYPE_ARM CPU_SUBTYPE_ARM_V8 arm v8
arm64 CPU_TYPE_ARM64 CPU_SUBTYPE_ARM64_V8 arm64 v8
ppc601 CPU_TYPE_POWERPC CPU_SUBTYPE_POWERPC_601 PowerPC 601
ppc603 CPU_TYPE_POWERPC CPU_SUBTYPE_POWERPC_603 PowerPC 603
ppc604 CPU_TYPE_POWERPC CPU_SUBTYPE_POWERPC_604 PowerPC 604
ppc604e CPU_TYPE_POWERPC CPU_SUBTYPE_POWERPC_604e PowerPC
604e
ppc750 CPU_TYPE_POWERPC CPU_SUBTYPE_POWERPC_750 PowerPC 750
ppc7400 CPU_TYPE_POWERPC CPU_SUBTYPE_POWERPC_7400 PowerPC
7400
ppc7450 CPU_TYPE_POWERPC CPU_SUBTYPE_POWERPC_7450 PowerPC
7450
ppc970 CPU_TYPE_POWERPC CPU_SUBTYPE_POWERPC_970 PowerPC 970
m68030 CPU_TYPE_MC680x0 CPU_SUBTYPE_MC68030_ONLY Motorola
68030
m68040 CPU_TYPE_MC680x0 CPU_SUBTYPE_MC68040 Motorola
68040
hppa7100LC CPU_TYPE_HPPA CPU_SUBTYPE_HPPA_7100LC HP-PA
7100LC
The first set of entries are used for the architecture family. The sec‐
ond set of entries are used for a specific architecture, when more than
one specific architecture is supported in a family of architectures.
NXGetAllArchInfos() returns a pointer to an array of all known NXArchInfo
structures. The last NXArchInfo is marked by a NULL name.
NXGetLocalArchInfo() returns the NXArchInfo for the local host, or NULL
if none is known.
NXGetArchInfoFromName() and NXGetArchInfoFromCpuType() return the NXArch‐
Info from the architecture's name or CPU type/CPU subtype combination. A
CPU subtype of CPU_SUBTYPE_MULTIPLE can be used to request the most gen‐
eral NXArchInfo known for the given CPU type. NULL is returned if no
matching NXArchInfo can be found.
NXFindBestFatArch() is passed a CPU type and CPU subtype and a set of
fat_arch structs. It selects the best one that matches (if any), and
returns a pointer to that fat_arch struct (or NULL). The fat_arch
structs must be in the host byte order and correct such that fat_archs
really points to enough memory for nfat_archs structs. It is possible
that this routine could fail if new CPU types or CPU subtypes are added
and an old version of this routine is used. But if there is an exact
match between the CPU type and CPU subtype and one of the fat_arch
structs, this routine will always succeed.
NXCombineCpuSubtypes() returns the resulting CPU subtype when combining
two different CPU subtypes for the specified CPU type. If the two CPU
subtypes can't be combined (the specific subtypes are mutually exclu‐
sive), -1 is returned, indicating it is an error to combine them. This
can also fail and return -1 if new CPU types or CPU subtypes are added
and an old version of this routine is used. But if the CPU subtypes are
the same, they can always be combined and this routine will return the
CPU subtype passed in.
SEE ALSOarch(1)
September 13, 2013
