308 lines
9.7 KiB
Plaintext
308 lines
9.7 KiB
Plaintext
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@section Architectures
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BFD keeps one atom in a BFD describing the
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architecture of the data attached to the BFD: a pointer to a
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@code{bfd_arch_info_type}.
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Pointers to structures can be requested independently of a BFD
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so that an architecture's information can be interrogated
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without access to an open BFD.
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The architecture information is provided by each architecture package.
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The set of default architectures is selected by the macro
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@code{SELECT_ARCHITECTURES}. This is normally set up in the
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@file{config/@var{target}.mt} file of your choice. If the name is not
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defined, then all the architectures supported are included.
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When BFD starts up, all the architectures are called with an
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initialize method. It is up to the architecture back end to
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insert as many items into the list of architectures as it wants to;
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generally this would be one for each machine and one for the
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default case (an item with a machine field of 0).
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BFD's idea of an architecture is implemented in @file{archures.c}.
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@*
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@subsection bfd_architecture
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@*
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@strong{Description}@*
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This enum gives the object file's CPU architecture, in a
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global sense---i.e., what processor family does it belong to?
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Another field indicates which processor within
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the family is in use. The machine gives a number which
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distinguishes different versions of the architecture,
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containing, for example, 2 and 3 for Intel i960 KA and i960 KB,
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and 68020 and 68030 for Motorola 68020 and 68030.
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@example
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enum bfd_architecture
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@{
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bfd_arch_unknown, /* File arch not known */
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bfd_arch_obscure, /* Arch known, not one of these */
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bfd_arch_m68k, /* Motorola 68xxx */
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bfd_arch_vax, /* DEC Vax */
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bfd_arch_i960, /* Intel 960 */
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/* The order of the following is important.
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lower number indicates a machine type that
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only accepts a subset of the instructions
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available to machines with higher numbers.
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The exception is the "ca", which is
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incompatible with all other machines except
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"core". */
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#define bfd_mach_i960_core 1
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#define bfd_mach_i960_ka_sa 2
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#define bfd_mach_i960_kb_sb 3
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#define bfd_mach_i960_mc 4
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#define bfd_mach_i960_xa 5
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#define bfd_mach_i960_ca 6
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#define bfd_mach_i960_jx 7
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#define bfd_mach_i960_hx 8
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bfd_arch_a29k, /* AMD 29000 */
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bfd_arch_sparc, /* SPARC */
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#define bfd_mach_sparc 1
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/* The difference between v8plus and v9 is that v9 is a true 64 bit env. */
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#define bfd_mach_sparc_sparclet 2
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#define bfd_mach_sparc_sparclite 3
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#define bfd_mach_sparc_v8plus 4
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#define bfd_mach_sparc_v8plusa 5 /* with ultrasparc add'ns */
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#define bfd_mach_sparc_v9 6
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#define bfd_mach_sparc_v9a 7 /* with ultrasparc add'ns */
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/* Nonzero if MACH has the v9 instruction set. */
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#define bfd_mach_sparc_v9_p(mach) \
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((mach) >= bfd_mach_sparc_v8plus && (mach) <= bfd_mach_sparc_v9a)
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bfd_arch_mips, /* MIPS Rxxxx */
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bfd_arch_i386, /* Intel 386 */
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#define bfd_mach_i386_i386 0
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#define bfd_mach_i386_i8086 1
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bfd_arch_we32k, /* AT&T WE32xxx */
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bfd_arch_tahoe, /* CCI/Harris Tahoe */
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bfd_arch_i860, /* Intel 860 */
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bfd_arch_romp, /* IBM ROMP PC/RT */
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bfd_arch_alliant, /* Alliant */
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bfd_arch_convex, /* Convex */
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bfd_arch_m88k, /* Motorola 88xxx */
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bfd_arch_pyramid, /* Pyramid Technology */
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bfd_arch_h8300, /* Hitachi H8/300 */
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#define bfd_mach_h8300 1
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#define bfd_mach_h8300h 2
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#define bfd_mach_h8300s 3
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bfd_arch_powerpc, /* PowerPC */
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bfd_arch_rs6000, /* IBM RS/6000 */
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bfd_arch_hppa, /* HP PA RISC */
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bfd_arch_d10v, /* Mitsubishi D10V */
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bfd_arch_z8k, /* Zilog Z8000 */
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#define bfd_mach_z8001 1
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#define bfd_mach_z8002 2
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bfd_arch_h8500, /* Hitachi H8/500 */
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bfd_arch_sh, /* Hitachi SH */
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bfd_arch_alpha, /* Dec Alpha */
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bfd_arch_arm, /* Advanced Risc Machines ARM */
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bfd_arch_ns32k, /* National Semiconductors ns32000 */
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bfd_arch_w65, /* WDC 65816 */
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bfd_arch_m32r, /* Mitsubishi M32R/D */
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bfd_arch_mn10200, /* Matsushita MN10200 */
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bfd_arch_mn10300, /* Matsushita MN10300 */
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bfd_arch_last
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@};
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@end example
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@*
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@subsection bfd_arch_info
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@*
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@strong{Description}@*
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This structure contains information on architectures for use
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within BFD.
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@example
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typedef struct bfd_arch_info
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@{
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int bits_per_word;
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int bits_per_address;
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int bits_per_byte;
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enum bfd_architecture arch;
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unsigned long mach;
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const char *arch_name;
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const char *printable_name;
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unsigned int section_align_power;
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/* true if this is the default machine for the architecture */
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boolean the_default;
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const struct bfd_arch_info * (*compatible)
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PARAMS ((const struct bfd_arch_info *a,
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const struct bfd_arch_info *b));
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boolean (*scan) PARAMS ((const struct bfd_arch_info *, const char *));
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const struct bfd_arch_info *next;
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@} bfd_arch_info_type;
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@end example
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@*
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@findex bfd_printable_name
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@subsubsection @code{bfd_printable_name}
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@strong{Synopsis}
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@example
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const char *bfd_printable_name(bfd *abfd);
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@end example
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@strong{Description}@*
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Return a printable string representing the architecture and machine
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from the pointer to the architecture info structure.
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@*
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@findex bfd_scan_arch
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@subsubsection @code{bfd_scan_arch}
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@strong{Synopsis}
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@example
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const bfd_arch_info_type *bfd_scan_arch(const char *string);
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@end example
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@strong{Description}@*
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Figure out if BFD supports any cpu which could be described with
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the name @var{string}. Return a pointer to an @code{arch_info}
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structure if a machine is found, otherwise NULL.
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@*
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@findex bfd_arch_get_compatible
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@subsubsection @code{bfd_arch_get_compatible}
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@strong{Synopsis}
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@example
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const bfd_arch_info_type *bfd_arch_get_compatible(
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const bfd *abfd,
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const bfd *bbfd);
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@end example
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@strong{Description}@*
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Determine whether two BFDs'
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architectures and machine types are compatible. Calculates
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the lowest common denominator between the two architectures
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and machine types implied by the BFDs and returns a pointer to
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an @code{arch_info} structure describing the compatible machine.
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@*
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@findex bfd_default_arch_struct
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@subsubsection @code{bfd_default_arch_struct}
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@strong{Description}@*
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The @code{bfd_default_arch_struct} is an item of
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@code{bfd_arch_info_type} which has been initialized to a fairly
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generic state. A BFD starts life by pointing to this
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structure, until the correct back end has determined the real
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architecture of the file.
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@example
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extern const bfd_arch_info_type bfd_default_arch_struct;
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@end example
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@*
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@findex bfd_set_arch_info
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@subsubsection @code{bfd_set_arch_info}
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@strong{Synopsis}
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@example
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void bfd_set_arch_info(bfd *abfd, const bfd_arch_info_type *arg);
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@end example
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@strong{Description}@*
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Set the architecture info of @var{abfd} to @var{arg}.
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@*
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@findex bfd_default_set_arch_mach
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@subsubsection @code{bfd_default_set_arch_mach}
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@strong{Synopsis}
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@example
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boolean bfd_default_set_arch_mach(bfd *abfd,
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enum bfd_architecture arch,
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unsigned long mach);
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@end example
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@strong{Description}@*
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Set the architecture and machine type in BFD @var{abfd}
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to @var{arch} and @var{mach}. Find the correct
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pointer to a structure and insert it into the @code{arch_info}
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pointer.
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@*
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@findex bfd_get_arch
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@subsubsection @code{bfd_get_arch}
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@strong{Synopsis}
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@example
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enum bfd_architecture bfd_get_arch(bfd *abfd);
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@end example
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@strong{Description}@*
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Return the enumerated type which describes the BFD @var{abfd}'s
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architecture.
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@*
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@findex bfd_get_mach
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@subsubsection @code{bfd_get_mach}
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@strong{Synopsis}
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@example
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unsigned long bfd_get_mach(bfd *abfd);
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@end example
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@strong{Description}@*
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Return the long type which describes the BFD @var{abfd}'s
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machine.
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@*
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@findex bfd_arch_bits_per_byte
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@subsubsection @code{bfd_arch_bits_per_byte}
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@strong{Synopsis}
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@example
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unsigned int bfd_arch_bits_per_byte(bfd *abfd);
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@end example
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@strong{Description}@*
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Return the number of bits in one of the BFD @var{abfd}'s
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architecture's bytes.
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@*
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@findex bfd_arch_bits_per_address
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@subsubsection @code{bfd_arch_bits_per_address}
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@strong{Synopsis}
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@example
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unsigned int bfd_arch_bits_per_address(bfd *abfd);
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@end example
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@strong{Description}@*
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Return the number of bits in one of the BFD @var{abfd}'s
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architecture's addresses.
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@*
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@findex bfd_default_compatible
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@subsubsection @code{bfd_default_compatible}
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@strong{Synopsis}
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@example
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const bfd_arch_info_type *bfd_default_compatible
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(const bfd_arch_info_type *a,
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const bfd_arch_info_type *b);
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@end example
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@strong{Description}@*
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The default function for testing for compatibility.
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@*
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@findex bfd_default_scan
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@subsubsection @code{bfd_default_scan}
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@strong{Synopsis}
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@example
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boolean bfd_default_scan(const struct bfd_arch_info *info, const char *string);
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@end example
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@strong{Description}@*
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The default function for working out whether this is an
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architecture hit and a machine hit.
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@*
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@findex bfd_get_arch_info
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@subsubsection @code{bfd_get_arch_info}
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@strong{Synopsis}
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@example
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const bfd_arch_info_type * bfd_get_arch_info(bfd *abfd);
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@end example
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@strong{Description}@*
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Return the architecture info struct in @var{abfd}.
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@*
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@findex bfd_lookup_arch
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@subsubsection @code{bfd_lookup_arch}
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@strong{Synopsis}
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@example
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const bfd_arch_info_type *bfd_lookup_arch
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(enum bfd_architecture
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arch,
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unsigned long machine);
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@end example
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@strong{Description}@*
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Look for the architecure info structure which matches the
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arguments @var{arch} and @var{machine}. A machine of 0 matches the
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machine/architecture structure which marks itself as the
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default.
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@*
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@findex bfd_printable_arch_mach
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@subsubsection @code{bfd_printable_arch_mach}
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@strong{Synopsis}
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@example
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const char *bfd_printable_arch_mach
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(enum bfd_architecture arch, unsigned long machine);
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@end example
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@strong{Description}@*
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Return a printable string representing the architecture and
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machine type.
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This routine is depreciated.
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@*
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