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+@section Architectures
+BFD keeps one atom in a BFD describing the
+architecture of the data attached to the BFD: a pointer to a
+@code{bfd_arch_info_type}.
+
+Pointers to structures can be requested independently of a BFD
+so that an architecture's information can be interrogated
+without access to an open BFD.
+
+The architecture information is provided by each architecture package.
+The set of default architectures is selected by the macro
+@code{SELECT_ARCHITECTURES}. This is normally set up in the
+@file{config/@var{target}.mt} file of your choice. If the name is not
+defined, then all the architectures supported are included.
+
+When BFD starts up, all the architectures are called with an
+initialize method. It is up to the architecture back end to
+insert as many items into the list of architectures as it wants to;
+generally this would be one for each machine and one for the
+default case (an item with a machine field of 0).
+
+BFD's idea of an architecture is implemented in @file{archures.c}.
+
+@subsection bfd_architecture
+
+
+@strong{Description}@*
+This enum gives the object file's CPU architecture, in a
+global sense---i.e., what processor family does it belong to?
+Another field indicates which processor within
+the family is in use. The machine gives a number which
+distinguishes different versions of the architecture,
+containing, for example, 2 and 3 for Intel i960 KA and i960 KB,
+and 68020 and 68030 for Motorola 68020 and 68030.
+@example
+enum bfd_architecture
+@{
+ bfd_arch_unknown, /* File arch not known. */
+ bfd_arch_obscure, /* Arch known, not one of these. */
+ bfd_arch_m68k, /* Motorola 68xxx */
+#define bfd_mach_m68000 1
+#define bfd_mach_m68008 2
+#define bfd_mach_m68010 3
+#define bfd_mach_m68020 4
+#define bfd_mach_m68030 5
+#define bfd_mach_m68040 6
+#define bfd_mach_m68060 7
+#define bfd_mach_cpu32 8
+#define bfd_mach_fido 9
+#define bfd_mach_mcf_isa_a_nodiv 10
+#define bfd_mach_mcf_isa_a 11
+#define bfd_mach_mcf_isa_a_mac 12
+#define bfd_mach_mcf_isa_a_emac 13
+#define bfd_mach_mcf_isa_aplus 14
+#define bfd_mach_mcf_isa_aplus_mac 15
+#define bfd_mach_mcf_isa_aplus_emac 16
+#define bfd_mach_mcf_isa_b_nousp 17
+#define bfd_mach_mcf_isa_b_nousp_mac 18
+#define bfd_mach_mcf_isa_b_nousp_emac 19
+#define bfd_mach_mcf_isa_b 20
+#define bfd_mach_mcf_isa_b_mac 21
+#define bfd_mach_mcf_isa_b_emac 22
+#define bfd_mach_mcf_isa_b_float 23
+#define bfd_mach_mcf_isa_b_float_mac 24
+#define bfd_mach_mcf_isa_b_float_emac 25
+#define bfd_mach_mcf_isa_c 26
+#define bfd_mach_mcf_isa_c_mac 27
+#define bfd_mach_mcf_isa_c_emac 28
+#define bfd_mach_mcf_isa_c_nodiv 29
+#define bfd_mach_mcf_isa_c_nodiv_mac 30
+#define bfd_mach_mcf_isa_c_nodiv_emac 31
+ bfd_arch_vax, /* DEC Vax */
+ bfd_arch_i960, /* Intel 960 */
+ /* The order of the following is important.
+ lower number indicates a machine type that
+ only accepts a subset of the instructions
+ available to machines with higher numbers.
+ The exception is the "ca", which is
+ incompatible with all other machines except
+ "core". */
+
+#define bfd_mach_i960_core 1
+#define bfd_mach_i960_ka_sa 2
+#define bfd_mach_i960_kb_sb 3
+#define bfd_mach_i960_mc 4
+#define bfd_mach_i960_xa 5
+#define bfd_mach_i960_ca 6
+#define bfd_mach_i960_jx 7
+#define bfd_mach_i960_hx 8
+
+ bfd_arch_or32, /* OpenRISC 32 */
+
+ bfd_arch_sparc, /* SPARC */
+#define bfd_mach_sparc 1
+/* The difference between v8plus and v9 is that v9 is a true 64 bit env. */
+#define bfd_mach_sparc_sparclet 2
+#define bfd_mach_sparc_sparclite 3
+#define bfd_mach_sparc_v8plus 4
+#define bfd_mach_sparc_v8plusa 5 /* with ultrasparc add'ns. */
+#define bfd_mach_sparc_sparclite_le 6
+#define bfd_mach_sparc_v9 7
+#define bfd_mach_sparc_v9a 8 /* with ultrasparc add'ns. */
+#define bfd_mach_sparc_v8plusb 9 /* with cheetah add'ns. */
+#define bfd_mach_sparc_v9b 10 /* with cheetah add'ns. */
+/* Nonzero if MACH has the v9 instruction set. */
+#define bfd_mach_sparc_v9_p(mach) \
+ ((mach) >= bfd_mach_sparc_v8plus && (mach) <= bfd_mach_sparc_v9b \
+ && (mach) != bfd_mach_sparc_sparclite_le)
+/* Nonzero if MACH is a 64 bit sparc architecture. */
+#define bfd_mach_sparc_64bit_p(mach) \
+ ((mach) >= bfd_mach_sparc_v9 && (mach) != bfd_mach_sparc_v8plusb)
+ bfd_arch_spu, /* PowerPC SPU */
+#define bfd_mach_spu 256
+ bfd_arch_mips, /* MIPS Rxxxx */
+#define bfd_mach_mips3000 3000
+#define bfd_mach_mips3900 3900
+#define bfd_mach_mips4000 4000
+#define bfd_mach_mips4010 4010
+#define bfd_mach_mips4100 4100
+#define bfd_mach_mips4111 4111
+#define bfd_mach_mips4120 4120
+#define bfd_mach_mips4300 4300
+#define bfd_mach_mips4400 4400
+#define bfd_mach_mips4600 4600
+#define bfd_mach_mips4650 4650
+#define bfd_mach_mips5000 5000
+#define bfd_mach_mips5400 5400
+#define bfd_mach_mips5500 5500
+#define bfd_mach_mips6000 6000
+#define bfd_mach_mips7000 7000
+#define bfd_mach_mips8000 8000
+#define bfd_mach_mips9000 9000
+#define bfd_mach_mips10000 10000
+#define bfd_mach_mips12000 12000
+#define bfd_mach_mips14000 14000
+#define bfd_mach_mips16000 16000
+#define bfd_mach_mips16 16
+#define bfd_mach_mips5 5
+#define bfd_mach_mips_loongson_2e 3001
+#define bfd_mach_mips_loongson_2f 3002
+#define bfd_mach_mips_loongson_3a 3003
+#define bfd_mach_mips_sb1 12310201 /* octal 'SB', 01 */
+#define bfd_mach_mips_octeon 6501
+#define bfd_mach_mips_xlr 887682 /* decimal 'XLR' */
+#define bfd_mach_mipsisa32 32
+#define bfd_mach_mipsisa32r2 33
+#define bfd_mach_mipsisa64 64
+#define bfd_mach_mipsisa64r2 65
+#define bfd_mach_mips_micromips 96
+ bfd_arch_i386, /* Intel 386 */
+#define bfd_mach_i386_intel_syntax (1 << 0)
+#define bfd_mach_i386_i8086 (1 << 1)
+#define bfd_mach_i386_i386 (1 << 2)
+#define bfd_mach_x86_64 (1 << 3)
+#define bfd_mach_x64_32 (1 << 4)
+#define bfd_mach_i386_i386_intel_syntax (bfd_mach_i386_i386 | bfd_mach_i386_intel_syntax)
+#define bfd_mach_x86_64_intel_syntax (bfd_mach_x86_64 | bfd_mach_i386_intel_syntax)
+#define bfd_mach_x64_32_intel_syntax (bfd_mach_x64_32 | bfd_mach_i386_intel_syntax)
+ bfd_arch_l1om, /* Intel L1OM */
+#define bfd_mach_l1om (1 << 5)
+#define bfd_mach_l1om_intel_syntax (bfd_mach_l1om | bfd_mach_i386_intel_syntax)
+ bfd_arch_k1om, /* Intel K1OM */
+#define bfd_mach_k1om (1 << 6)
+#define bfd_mach_k1om_intel_syntax (bfd_mach_k1om | bfd_mach_i386_intel_syntax)
+ bfd_arch_we32k, /* AT&T WE32xxx */
+ bfd_arch_tahoe, /* CCI/Harris Tahoe */
+ bfd_arch_i860, /* Intel 860 */
+ bfd_arch_i370, /* IBM 360/370 Mainframes */
+ bfd_arch_romp, /* IBM ROMP PC/RT */
+ bfd_arch_convex, /* Convex */
+ bfd_arch_m88k, /* Motorola 88xxx */
+ bfd_arch_m98k, /* Motorola 98xxx */
+ bfd_arch_pyramid, /* Pyramid Technology */
+ bfd_arch_h8300, /* Renesas H8/300 (formerly Hitachi H8/300) */
+#define bfd_mach_h8300 1
+#define bfd_mach_h8300h 2
+#define bfd_mach_h8300s 3
+#define bfd_mach_h8300hn 4
+#define bfd_mach_h8300sn 5
+#define bfd_mach_h8300sx 6
+#define bfd_mach_h8300sxn 7
+ bfd_arch_pdp11, /* DEC PDP-11 */
+ bfd_arch_plugin,
+ bfd_arch_powerpc, /* PowerPC */
+#define bfd_mach_ppc 32
+#define bfd_mach_ppc64 64
+#define bfd_mach_ppc_403 403
+#define bfd_mach_ppc_403gc 4030
+#define bfd_mach_ppc_405 405
+#define bfd_mach_ppc_505 505
+#define bfd_mach_ppc_601 601
+#define bfd_mach_ppc_602 602
+#define bfd_mach_ppc_603 603
+#define bfd_mach_ppc_ec603e 6031
+#define bfd_mach_ppc_604 604
+#define bfd_mach_ppc_620 620
+#define bfd_mach_ppc_630 630
+#define bfd_mach_ppc_750 750
+#define bfd_mach_ppc_860 860
+#define bfd_mach_ppc_a35 35
+#define bfd_mach_ppc_rs64ii 642
+#define bfd_mach_ppc_rs64iii 643
+#define bfd_mach_ppc_7400 7400
+#define bfd_mach_ppc_e500 500
+#define bfd_mach_ppc_e500mc 5001
+#define bfd_mach_ppc_e500mc64 5005
+#define bfd_mach_ppc_titan 83
+ bfd_arch_rs6000, /* IBM RS/6000 */
+#define bfd_mach_rs6k 6000
+#define bfd_mach_rs6k_rs1 6001
+#define bfd_mach_rs6k_rsc 6003
+#define bfd_mach_rs6k_rs2 6002
+ bfd_arch_hppa, /* HP PA RISC */
+#define bfd_mach_hppa10 10
+#define bfd_mach_hppa11 11
+#define bfd_mach_hppa20 20
+#define bfd_mach_hppa20w 25
+ bfd_arch_d10v, /* Mitsubishi D10V */
+#define bfd_mach_d10v 1
+#define bfd_mach_d10v_ts2 2
+#define bfd_mach_d10v_ts3 3
+ bfd_arch_d30v, /* Mitsubishi D30V */
+ bfd_arch_dlx, /* DLX */
+ bfd_arch_m68hc11, /* Motorola 68HC11 */
+ bfd_arch_m68hc12, /* Motorola 68HC12 */
+#define bfd_mach_m6812_default 0
+#define bfd_mach_m6812 1
+#define bfd_mach_m6812s 2
+ bfd_arch_z8k, /* Zilog Z8000 */
+#define bfd_mach_z8001 1
+#define bfd_mach_z8002 2
+ bfd_arch_h8500, /* Renesas H8/500 (formerly Hitachi H8/500) */
+ bfd_arch_sh, /* Renesas / SuperH SH (formerly Hitachi SH) */
+#define bfd_mach_sh 1
+#define bfd_mach_sh2 0x20
+#define bfd_mach_sh_dsp 0x2d
+#define bfd_mach_sh2a 0x2a
+#define bfd_mach_sh2a_nofpu 0x2b
+#define bfd_mach_sh2a_nofpu_or_sh4_nommu_nofpu 0x2a1
+#define bfd_mach_sh2a_nofpu_or_sh3_nommu 0x2a2
+#define bfd_mach_sh2a_or_sh4 0x2a3
+#define bfd_mach_sh2a_or_sh3e 0x2a4
+#define bfd_mach_sh2e 0x2e
+#define bfd_mach_sh3 0x30
+#define bfd_mach_sh3_nommu 0x31
+#define bfd_mach_sh3_dsp 0x3d
+#define bfd_mach_sh3e 0x3e
+#define bfd_mach_sh4 0x40
+#define bfd_mach_sh4_nofpu 0x41
+#define bfd_mach_sh4_nommu_nofpu 0x42
+#define bfd_mach_sh4a 0x4a
+#define bfd_mach_sh4a_nofpu 0x4b
+#define bfd_mach_sh4al_dsp 0x4d
+#define bfd_mach_sh5 0x50
+ bfd_arch_alpha, /* Dec Alpha */
+#define bfd_mach_alpha_ev4 0x10
+#define bfd_mach_alpha_ev5 0x20
+#define bfd_mach_alpha_ev6 0x30
+ bfd_arch_arm, /* Advanced Risc Machines ARM. */
+#define bfd_mach_arm_unknown 0
+#define bfd_mach_arm_2 1
+#define bfd_mach_arm_2a 2
+#define bfd_mach_arm_3 3
+#define bfd_mach_arm_3M 4
+#define bfd_mach_arm_4 5
+#define bfd_mach_arm_4T 6
+#define bfd_mach_arm_5 7
+#define bfd_mach_arm_5T 8
+#define bfd_mach_arm_5TE 9
+#define bfd_mach_arm_XScale 10
+#define bfd_mach_arm_ep9312 11
+#define bfd_mach_arm_iWMMXt 12
+#define bfd_mach_arm_iWMMXt2 13
+ bfd_arch_ns32k, /* National Semiconductors ns32000 */
+ bfd_arch_w65, /* WDC 65816 */
+ bfd_arch_tic30, /* Texas Instruments TMS320C30 */
+ bfd_arch_tic4x, /* Texas Instruments TMS320C3X/4X */
+#define bfd_mach_tic3x 30
+#define bfd_mach_tic4x 40
+ bfd_arch_tic54x, /* Texas Instruments TMS320C54X */
+ bfd_arch_tic6x, /* Texas Instruments TMS320C6X */
+ bfd_arch_tic80, /* TI TMS320c80 (MVP) */
+ bfd_arch_v850, /* NEC V850 */
+#define bfd_mach_v850 1
+#define bfd_mach_v850e 'E'
+#define bfd_mach_v850e1 '1'
+#define bfd_mach_v850e2 0x4532
+#define bfd_mach_v850e2v3 0x45325633
+ bfd_arch_arc, /* ARC Cores */
+#define bfd_mach_arc_5 5
+#define bfd_mach_arc_6 6
+#define bfd_mach_arc_7 7
+#define bfd_mach_arc_8 8
+ bfd_arch_m32c, /* Renesas M16C/M32C. */
+#define bfd_mach_m16c 0x75
+#define bfd_mach_m32c 0x78
+ bfd_arch_m32r, /* Renesas M32R (formerly Mitsubishi M32R/D) */
+#define bfd_mach_m32r 1 /* For backwards compatibility. */
+#define bfd_mach_m32rx 'x'
+#define bfd_mach_m32r2 '2'
+ bfd_arch_mn10200, /* Matsushita MN10200 */
+ bfd_arch_mn10300, /* Matsushita MN10300 */
+#define bfd_mach_mn10300 300
+#define bfd_mach_am33 330
+#define bfd_mach_am33_2 332
+ bfd_arch_fr30,
+#define bfd_mach_fr30 0x46523330
+ bfd_arch_frv,
+#define bfd_mach_frv 1
+#define bfd_mach_frvsimple 2
+#define bfd_mach_fr300 300
+#define bfd_mach_fr400 400
+#define bfd_mach_fr450 450
+#define bfd_mach_frvtomcat 499 /* fr500 prototype */
+#define bfd_mach_fr500 500
+#define bfd_mach_fr550 550
+ bfd_arch_moxie, /* The moxie processor */
+#define bfd_mach_moxie 1
+ bfd_arch_mcore,
+ bfd_arch_mep,
+#define bfd_mach_mep 1
+#define bfd_mach_mep_h1 0x6831
+#define bfd_mach_mep_c5 0x6335
+ bfd_arch_ia64, /* HP/Intel ia64 */
+#define bfd_mach_ia64_elf64 64
+#define bfd_mach_ia64_elf32 32
+ bfd_arch_ip2k, /* Ubicom IP2K microcontrollers. */
+#define bfd_mach_ip2022 1
+#define bfd_mach_ip2022ext 2
+ bfd_arch_iq2000, /* Vitesse IQ2000. */
+#define bfd_mach_iq2000 1
+#define bfd_mach_iq10 2
+ bfd_arch_mt,
+#define bfd_mach_ms1 1
+#define bfd_mach_mrisc2 2
+#define bfd_mach_ms2 3
+ bfd_arch_pj,
+ bfd_arch_avr, /* Atmel AVR microcontrollers. */
+#define bfd_mach_avr1 1
+#define bfd_mach_avr2 2
+#define bfd_mach_avr25 25
+#define bfd_mach_avr3 3
+#define bfd_mach_avr31 31
+#define bfd_mach_avr35 35
+#define bfd_mach_avr4 4
+#define bfd_mach_avr5 5
+#define bfd_mach_avr51 51
+#define bfd_mach_avr6 6
+#define bfd_mach_avrxmega1 101
+#define bfd_mach_avrxmega2 102
+#define bfd_mach_avrxmega3 103
+#define bfd_mach_avrxmega4 104
+#define bfd_mach_avrxmega5 105
+#define bfd_mach_avrxmega6 106
+#define bfd_mach_avrxmega7 107
+ bfd_arch_bfin, /* ADI Blackfin */
+#define bfd_mach_bfin 1
+ bfd_arch_cr16, /* National Semiconductor CompactRISC (ie CR16). */
+#define bfd_mach_cr16 1
+ bfd_arch_cr16c, /* National Semiconductor CompactRISC. */
+#define bfd_mach_cr16c 1
+ bfd_arch_crx, /* National Semiconductor CRX. */
+#define bfd_mach_crx 1
+ bfd_arch_cris, /* Axis CRIS */
+#define bfd_mach_cris_v0_v10 255
+#define bfd_mach_cris_v32 32
+#define bfd_mach_cris_v10_v32 1032
+ bfd_arch_rx, /* Renesas RX. */
+#define bfd_mach_rx 0x75
+ bfd_arch_s390, /* IBM s390 */
+#define bfd_mach_s390_31 31
+#define bfd_mach_s390_64 64
+ bfd_arch_score, /* Sunplus score */
+#define bfd_mach_score3 3
+#define bfd_mach_score7 7
+ bfd_arch_openrisc, /* OpenRISC */
+ bfd_arch_mmix, /* Donald Knuth's educational processor. */
+ bfd_arch_xstormy16,
+#define bfd_mach_xstormy16 1
+ bfd_arch_msp430, /* Texas Instruments MSP430 architecture. */
+#define bfd_mach_msp11 11
+#define bfd_mach_msp110 110
+#define bfd_mach_msp12 12
+#define bfd_mach_msp13 13
+#define bfd_mach_msp14 14
+#define bfd_mach_msp15 15
+#define bfd_mach_msp16 16
+#define bfd_mach_msp21 21
+#define bfd_mach_msp31 31
+#define bfd_mach_msp32 32
+#define bfd_mach_msp33 33
+#define bfd_mach_msp41 41
+#define bfd_mach_msp42 42
+#define bfd_mach_msp43 43
+#define bfd_mach_msp44 44
+ bfd_arch_xc16x, /* Infineon's XC16X Series. */
+#define bfd_mach_xc16x 1
+#define bfd_mach_xc16xl 2
+#define bfd_mach_xc16xs 3
+ bfd_arch_xtensa, /* Tensilica's Xtensa cores. */
+#define bfd_mach_xtensa 1
+ bfd_arch_z80,
+#define bfd_mach_z80strict 1 /* No undocumented opcodes. */
+#define bfd_mach_z80 3 /* With ixl, ixh, iyl, and iyh. */
+#define bfd_mach_z80full 7 /* All undocumented instructions. */
+#define bfd_mach_r800 11 /* R800: successor with multiplication. */
+ bfd_arch_lm32, /* Lattice Mico32 */
+#define bfd_mach_lm32 1
+ bfd_arch_microblaze,/* Xilinx MicroBlaze. */
+ bfd_arch_tilepro, /* Tilera TILEPro */
+ bfd_arch_tilegx, /* Tilera TILE-Gx */
+#define bfd_mach_tilepro 1
+#define bfd_mach_tilegx 1
+ bfd_arch_last
+ @};
+@end example
+
+@subsection bfd_arch_info
+
+
+@strong{Description}@*
+This structure contains information on architectures for use
+within BFD.
+@example
+
+typedef struct bfd_arch_info
+@{
+ int bits_per_word;
+ int bits_per_address;
+ int bits_per_byte;
+ enum bfd_architecture arch;
+ unsigned long mach;
+ const char *arch_name;
+ const char *printable_name;
+ unsigned int section_align_power;
+ /* TRUE if this is the default machine for the architecture.
+ The default arch should be the first entry for an arch so that
+ all the entries for that arch can be accessed via @code{next}. */
+ bfd_boolean the_default;
+ const struct bfd_arch_info * (*compatible)
+ (const struct bfd_arch_info *a, const struct bfd_arch_info *b);
+
+ bfd_boolean (*scan) (const struct bfd_arch_info *, const char *);
+
+ const struct bfd_arch_info *next;
+@}
+bfd_arch_info_type;
+
+@end example
+
+@findex bfd_printable_name
+@subsubsection @code{bfd_printable_name}
+@strong{Synopsis}
+@example
+const char *bfd_printable_name (bfd *abfd);
+@end example
+@strong{Description}@*
+Return a printable string representing the architecture and machine
+from the pointer to the architecture info structure.
+
+@findex bfd_scan_arch
+@subsubsection @code{bfd_scan_arch}
+@strong{Synopsis}
+@example
+const bfd_arch_info_type *bfd_scan_arch (const char *string);
+@end example
+@strong{Description}@*
+Figure out if BFD supports any cpu which could be described with
+the name @var{string}. Return a pointer to an @code{arch_info}
+structure if a machine is found, otherwise NULL.
+
+@findex bfd_arch_list
+@subsubsection @code{bfd_arch_list}
+@strong{Synopsis}
+@example
+const char **bfd_arch_list (void);
+@end example
+@strong{Description}@*
+Return a freshly malloced NULL-terminated vector of the names
+of all the valid BFD architectures. Do not modify the names.
+
+@findex bfd_arch_get_compatible
+@subsubsection @code{bfd_arch_get_compatible}
+@strong{Synopsis}
+@example
+const bfd_arch_info_type *bfd_arch_get_compatible
+ (const bfd *abfd, const bfd *bbfd, bfd_boolean accept_unknowns);
+@end example
+@strong{Description}@*
+Determine whether two BFDs' architectures and machine types
+are compatible. Calculates the lowest common denominator
+between the two architectures and machine types implied by
+the BFDs and returns a pointer to an @code{arch_info} structure
+describing the compatible machine.
+
+@findex bfd_default_arch_struct
+@subsubsection @code{bfd_default_arch_struct}
+@strong{Description}@*
+The @code{bfd_default_arch_struct} is an item of
+@code{bfd_arch_info_type} which has been initialized to a fairly
+generic state. A BFD starts life by pointing to this
+structure, until the correct back end has determined the real
+architecture of the file.
+@example
+extern const bfd_arch_info_type bfd_default_arch_struct;
+@end example
+
+@findex bfd_set_arch_info
+@subsubsection @code{bfd_set_arch_info}
+@strong{Synopsis}
+@example
+void bfd_set_arch_info (bfd *abfd, const bfd_arch_info_type *arg);
+@end example
+@strong{Description}@*
+Set the architecture info of @var{abfd} to @var{arg}.
+
+@findex bfd_default_set_arch_mach
+@subsubsection @code{bfd_default_set_arch_mach}
+@strong{Synopsis}
+@example
+bfd_boolean bfd_default_set_arch_mach
+ (bfd *abfd, enum bfd_architecture arch, unsigned long mach);
+@end example
+@strong{Description}@*
+Set the architecture and machine type in BFD @var{abfd}
+to @var{arch} and @var{mach}. Find the correct
+pointer to a structure and insert it into the @code{arch_info}
+pointer.
+
+@findex bfd_get_arch
+@subsubsection @code{bfd_get_arch}
+@strong{Synopsis}
+@example
+enum bfd_architecture bfd_get_arch (bfd *abfd);
+@end example
+@strong{Description}@*
+Return the enumerated type which describes the BFD @var{abfd}'s
+architecture.
+
+@findex bfd_get_mach
+@subsubsection @code{bfd_get_mach}
+@strong{Synopsis}
+@example
+unsigned long bfd_get_mach (bfd *abfd);
+@end example
+@strong{Description}@*
+Return the long type which describes the BFD @var{abfd}'s
+machine.
+
+@findex bfd_arch_bits_per_byte
+@subsubsection @code{bfd_arch_bits_per_byte}
+@strong{Synopsis}
+@example
+unsigned int bfd_arch_bits_per_byte (bfd *abfd);
+@end example
+@strong{Description}@*
+Return the number of bits in one of the BFD @var{abfd}'s
+architecture's bytes.
+
+@findex bfd_arch_bits_per_address
+@subsubsection @code{bfd_arch_bits_per_address}
+@strong{Synopsis}
+@example
+unsigned int bfd_arch_bits_per_address (bfd *abfd);
+@end example
+@strong{Description}@*
+Return the number of bits in one of the BFD @var{abfd}'s
+architecture's addresses.
+
+@findex bfd_default_compatible
+@subsubsection @code{bfd_default_compatible}
+@strong{Synopsis}
+@example
+const bfd_arch_info_type *bfd_default_compatible
+ (const bfd_arch_info_type *a, const bfd_arch_info_type *b);
+@end example
+@strong{Description}@*
+The default function for testing for compatibility.
+
+@findex bfd_default_scan
+@subsubsection @code{bfd_default_scan}
+@strong{Synopsis}
+@example
+bfd_boolean bfd_default_scan
+ (const struct bfd_arch_info *info, const char *string);
+@end example
+@strong{Description}@*
+The default function for working out whether this is an
+architecture hit and a machine hit.
+
+@findex bfd_get_arch_info
+@subsubsection @code{bfd_get_arch_info}
+@strong{Synopsis}
+@example
+const bfd_arch_info_type *bfd_get_arch_info (bfd *abfd);
+@end example
+@strong{Description}@*
+Return the architecture info struct in @var{abfd}.
+
+@findex bfd_lookup_arch
+@subsubsection @code{bfd_lookup_arch}
+@strong{Synopsis}
+@example
+const bfd_arch_info_type *bfd_lookup_arch
+ (enum bfd_architecture arch, unsigned long machine);
+@end example
+@strong{Description}@*
+Look for the architecture info structure which matches the
+arguments @var{arch} and @var{machine}. A machine of 0 matches the
+machine/architecture structure which marks itself as the
+default.
+
+@findex bfd_printable_arch_mach
+@subsubsection @code{bfd_printable_arch_mach}
+@strong{Synopsis}
+@example
+const char *bfd_printable_arch_mach
+ (enum bfd_architecture arch, unsigned long machine);
+@end example
+@strong{Description}@*
+Return a printable string representing the architecture and
+machine type.
+
+This routine is depreciated.
+
+@findex bfd_octets_per_byte
+@subsubsection @code{bfd_octets_per_byte}
+@strong{Synopsis}
+@example
+unsigned int bfd_octets_per_byte (bfd *abfd);
+@end example
+@strong{Description}@*
+Return the number of octets (8-bit quantities) per target byte
+(minimum addressable unit). In most cases, this will be one, but some
+DSP targets have 16, 32, or even 48 bits per byte.
+
+@findex bfd_arch_mach_octets_per_byte
+@subsubsection @code{bfd_arch_mach_octets_per_byte}
+@strong{Synopsis}
+@example
+unsigned int bfd_arch_mach_octets_per_byte
+ (enum bfd_architecture arch, unsigned long machine);
+@end example
+@strong{Description}@*
+See bfd_octets_per_byte.
+
+This routine is provided for those cases where a bfd * is not
+available
+