1323 lines
48 KiB
Plaintext
1323 lines
48 KiB
Plaintext
This is Info file bfd.info, produced by Makeinfo-1.64 from the input
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file ./bfd.texinfo.
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START-INFO-DIR-ENTRY
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* Bfd: (bfd). The Binary File Descriptor library.
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END-INFO-DIR-ENTRY
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This file documents the BFD library.
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Copyright (C) 1991 Free Software Foundation, Inc.
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Permission is granted to make and distribute verbatim copies of this
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manual provided the copyright notice and this permission notice are
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preserved on all copies.
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Permission is granted to copy and distribute modified versions of
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this manual under the conditions for verbatim copying, subject to the
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terms of the GNU General Public License, which includes the provision
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that the entire resulting derived work is distributed under the terms
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of a permission notice identical to this one.
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Permission is granted to copy and distribute translations of this
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manual into another language, under the above conditions for modified
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versions.
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File: bfd.info, Node: howto manager, Prev: typedef arelent, Up: Relocations
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The howto manager
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=================
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When an application wants to create a relocation, but doesn't know what
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the target machine might call it, it can find out by using this bit of
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code.
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`bfd_reloc_code_type'
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.....................
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*Description*
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The insides of a reloc code. The idea is that, eventually, there will
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be one enumerator for every type of relocation we ever do. Pass one of
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these values to `bfd_reloc_type_lookup', and it'll return a howto
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pointer.
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This does mean that the application must determine the correct
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enumerator value; you can't get a howto pointer from a random set of
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attributes.
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Here are the possible values for `enum bfd_reloc_code_real':
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- : BFD_RELOC_64
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- : BFD_RELOC_32
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- : BFD_RELOC_26
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- : BFD_RELOC_24
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- : BFD_RELOC_16
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- : BFD_RELOC_14
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- : BFD_RELOC_8
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Basic absolute relocations of N bits.
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- : BFD_RELOC_64_PCREL
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- : BFD_RELOC_32_PCREL
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- : BFD_RELOC_24_PCREL
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- : BFD_RELOC_16_PCREL
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- : BFD_RELOC_12_PCREL
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- : BFD_RELOC_8_PCREL
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PC-relative relocations. Sometimes these are relative to the
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address of the relocation itself; sometimes they are relative to
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the start of the section containing the relocation. It depends on
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the specific target.
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The 24-bit relocation is used in some Intel 960 configurations.
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- : BFD_RELOC_32_GOT_PCREL
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- : BFD_RELOC_16_GOT_PCREL
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- : BFD_RELOC_8_GOT_PCREL
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- : BFD_RELOC_32_GOTOFF
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- : BFD_RELOC_16_GOTOFF
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- : BFD_RELOC_LO16_GOTOFF
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- : BFD_RELOC_HI16_GOTOFF
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- : BFD_RELOC_HI16_S_GOTOFF
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- : BFD_RELOC_8_GOTOFF
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- : BFD_RELOC_32_PLT_PCREL
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- : BFD_RELOC_24_PLT_PCREL
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- : BFD_RELOC_16_PLT_PCREL
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- : BFD_RELOC_8_PLT_PCREL
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- : BFD_RELOC_32_PLTOFF
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- : BFD_RELOC_16_PLTOFF
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- : BFD_RELOC_LO16_PLTOFF
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- : BFD_RELOC_HI16_PLTOFF
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- : BFD_RELOC_HI16_S_PLTOFF
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- : BFD_RELOC_8_PLTOFF
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For ELF.
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- : BFD_RELOC_68K_GLOB_DAT
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- : BFD_RELOC_68K_JMP_SLOT
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- : BFD_RELOC_68K_RELATIVE
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Relocations used by 68K ELF.
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- : BFD_RELOC_32_BASEREL
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- : BFD_RELOC_16_BASEREL
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- : BFD_RELOC_LO16_BASEREL
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- : BFD_RELOC_HI16_BASEREL
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- : BFD_RELOC_HI16_S_BASEREL
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- : BFD_RELOC_8_BASEREL
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- : BFD_RELOC_RVA
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Linkage-table relative.
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- : BFD_RELOC_8_FFnn
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Absolute 8-bit relocation, but used to form an address like 0xFFnn.
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- : BFD_RELOC_32_PCREL_S2
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- : BFD_RELOC_16_PCREL_S2
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- : BFD_RELOC_23_PCREL_S2
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These PC-relative relocations are stored as word displacements -
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i.e., byte displacements shifted right two bits. The 30-bit word
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displacement (<<32_PCREL_S2>> - 32 bits, shifted 2) is used on the
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SPARC. (SPARC tools generally refer to this as <<WDISP30>>.) The
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signed 16-bit displacement is used on the MIPS, and the 23-bit
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displacement is used on the Alpha.
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- : BFD_RELOC_HI22
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- : BFD_RELOC_LO10
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High 22 bits and low 10 bits of 32-bit value, placed into lower
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bits of the target word. These are used on the SPARC.
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- : BFD_RELOC_GPREL16
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- : BFD_RELOC_GPREL32
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For systems that allocate a Global Pointer register, these are
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displacements off that register. These relocation types are
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handled specially, because the value the register will have is
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decided relatively late.
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- : BFD_RELOC_I960_CALLJ
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Reloc types used for i960/b.out.
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- : BFD_RELOC_NONE
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- : BFD_RELOC_SPARC_WDISP22
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- : BFD_RELOC_SPARC22
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- : BFD_RELOC_SPARC13
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- : BFD_RELOC_SPARC_GOT10
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- : BFD_RELOC_SPARC_GOT13
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- : BFD_RELOC_SPARC_GOT22
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- : BFD_RELOC_SPARC_PC10
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- : BFD_RELOC_SPARC_PC22
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- : BFD_RELOC_SPARC_WPLT30
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- : BFD_RELOC_SPARC_COPY
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- : BFD_RELOC_SPARC_GLOB_DAT
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- : BFD_RELOC_SPARC_JMP_SLOT
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- : BFD_RELOC_SPARC_RELATIVE
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- : BFD_RELOC_SPARC_UA32
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SPARC ELF relocations. There is probably some overlap with other
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relocation types already defined.
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- : BFD_RELOC_SPARC_BASE13
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- : BFD_RELOC_SPARC_BASE22
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I think these are specific to SPARC a.out (e.g., Sun 4).
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- : BFD_RELOC_SPARC_64
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- : BFD_RELOC_SPARC_10
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- : BFD_RELOC_SPARC_11
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- : BFD_RELOC_SPARC_OLO10
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- : BFD_RELOC_SPARC_HH22
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- : BFD_RELOC_SPARC_HM10
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- : BFD_RELOC_SPARC_LM22
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- : BFD_RELOC_SPARC_PC_HH22
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- : BFD_RELOC_SPARC_PC_HM10
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- : BFD_RELOC_SPARC_PC_LM22
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- : BFD_RELOC_SPARC_WDISP16
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- : BFD_RELOC_SPARC_WDISP19
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- : BFD_RELOC_SPARC_GLOB_JMP
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- : BFD_RELOC_SPARC_7
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- : BFD_RELOC_SPARC_6
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- : BFD_RELOC_SPARC_5
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Some relocations we're using for SPARC V9 - subject to change.
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- : BFD_RELOC_ALPHA_GPDISP_HI16
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Alpha ECOFF and ELF relocations. Some of these treat the symbol or
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"addend" in some special way. For GPDISP_HI16 ("gpdisp")
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relocations, the symbol is ignored when writing; when reading, it
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will be the absolute section symbol. The addend is the
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displacement in bytes of the "lda" instruction from the "ldah"
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instruction (which is at the address of this reloc).
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- : BFD_RELOC_ALPHA_GPDISP_LO16
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For GPDISP_LO16 ("ignore") relocations, the symbol is handled as
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with GPDISP_HI16 relocs. The addend is ignored when writing the
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relocations out, and is filled in with the file's GP value on
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reading, for convenience.
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- : BFD_RELOC_ALPHA_GPDISP
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The ELF GPDISP relocation is exactly the same as the GPDISP_HI16
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relocation except that there is no accompanying GPDISP_LO16
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relocation.
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- : BFD_RELOC_ALPHA_LITERAL
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- : BFD_RELOC_ALPHA_ELF_LITERAL
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- : BFD_RELOC_ALPHA_LITUSE
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The Alpha LITERAL/LITUSE relocs are produced by a symbol reference;
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the assembler turns it into a LDQ instruction to load the address
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of the symbol, and then fills in a register in the real
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instruction.
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The LITERAL reloc, at the LDQ instruction, refers to the .lita
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section symbol. The addend is ignored when writing, but is filled
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in with the file's GP value on reading, for convenience, as with
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the GPDISP_LO16 reloc.
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The ELF_LITERAL reloc is somewhere between 16_GOTOFF and
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GPDISP_LO16. It should refer to the symbol to be referenced, as
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with 16_GOTOFF, but it generates output not based on the position
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within the .got section, but relative to the GP value chosen for
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the file during the final link stage.
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The LITUSE reloc, on the instruction using the loaded address,
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gives information to the linker that it might be able to use to
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optimize away some literal section references. The symbol is
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ignored (read as the absolute section symbol), and the "addend"
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indicates the type of instruction using the register: 1 - "memory"
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fmt insn 2 - byte-manipulation (byte offset reg) 3 - jsr (target
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of branch)
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The GNU linker currently doesn't do any of this optimizing.
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- : BFD_RELOC_ALPHA_HINT
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The HINT relocation indicates a value that should be filled into
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the "hint" field of a jmp/jsr/ret instruction, for possible branch-
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prediction logic which may be provided on some processors.
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- : BFD_RELOC_ALPHA_LINKAGE
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The LINKAGE relocation outputs a linkage pair in the object file,
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which is filled by the linker.
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- : BFD_RELOC_ALPHA_CODEADDR
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The CODEADDR relocation outputs a STO_CA in the object file, which
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is filled by the linker.
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- : BFD_RELOC_MIPS_JMP
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Bits 27..2 of the relocation address shifted right 2 bits; simple
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reloc otherwise.
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- : BFD_RELOC_MIPS16_JMP
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The MIPS16 jump instruction.
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- : BFD_RELOC_MIPS16_GPREL
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MIPS16 GP relative reloc.
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- : BFD_RELOC_HI16
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High 16 bits of 32-bit value; simple reloc.
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- : BFD_RELOC_HI16_S
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High 16 bits of 32-bit value but the low 16 bits will be sign
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extended and added to form the final result. If the low 16 bits
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form a negative number, we need to add one to the high value to
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compensate for the borrow when the low bits are added.
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- : BFD_RELOC_LO16
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Low 16 bits.
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- : BFD_RELOC_PCREL_HI16_S
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Like BFD_RELOC_HI16_S, but PC relative.
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- : BFD_RELOC_PCREL_LO16
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Like BFD_RELOC_LO16, but PC relative.
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- : BFD_RELOC_MIPS_GPREL
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Relocation relative to the global pointer.
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- : BFD_RELOC_MIPS_LITERAL
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Relocation against a MIPS literal section.
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- : BFD_RELOC_MIPS_GOT16
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- : BFD_RELOC_MIPS_CALL16
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- : BFD_RELOC_MIPS_GPREL32
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- : BFD_RELOC_MIPS_GOT_HI16
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- : BFD_RELOC_MIPS_GOT_LO16
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- : BFD_RELOC_MIPS_CALL_HI16
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- : BFD_RELOC_MIPS_CALL_LO16
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MIPS ELF relocations.
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- : BFD_RELOC_386_GOT32
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- : BFD_RELOC_386_PLT32
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- : BFD_RELOC_386_COPY
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- : BFD_RELOC_386_GLOB_DAT
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- : BFD_RELOC_386_JUMP_SLOT
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- : BFD_RELOC_386_RELATIVE
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- : BFD_RELOC_386_GOTOFF
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- : BFD_RELOC_386_GOTPC
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i386/elf relocations
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- : BFD_RELOC_NS32K_IMM_8
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- : BFD_RELOC_NS32K_IMM_16
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- : BFD_RELOC_NS32K_IMM_32
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- : BFD_RELOC_NS32K_IMM_8_PCREL
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- : BFD_RELOC_NS32K_IMM_16_PCREL
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- : BFD_RELOC_NS32K_IMM_32_PCREL
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- : BFD_RELOC_NS32K_DISP_8
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- : BFD_RELOC_NS32K_DISP_16
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- : BFD_RELOC_NS32K_DISP_32
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- : BFD_RELOC_NS32K_DISP_8_PCREL
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- : BFD_RELOC_NS32K_DISP_16_PCREL
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- : BFD_RELOC_NS32K_DISP_32_PCREL
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ns32k relocations
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- : BFD_RELOC_PPC_B26
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- : BFD_RELOC_PPC_BA26
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- : BFD_RELOC_PPC_TOC16
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- : BFD_RELOC_PPC_B16
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- : BFD_RELOC_PPC_B16_BRTAKEN
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- : BFD_RELOC_PPC_B16_BRNTAKEN
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- : BFD_RELOC_PPC_BA16
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- : BFD_RELOC_PPC_BA16_BRTAKEN
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- : BFD_RELOC_PPC_BA16_BRNTAKEN
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- : BFD_RELOC_PPC_COPY
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- : BFD_RELOC_PPC_GLOB_DAT
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- : BFD_RELOC_PPC_JMP_SLOT
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- : BFD_RELOC_PPC_RELATIVE
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- : BFD_RELOC_PPC_LOCAL24PC
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- : BFD_RELOC_PPC_EMB_NADDR32
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- : BFD_RELOC_PPC_EMB_NADDR16
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- : BFD_RELOC_PPC_EMB_NADDR16_LO
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- : BFD_RELOC_PPC_EMB_NADDR16_HI
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- : BFD_RELOC_PPC_EMB_NADDR16_HA
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- : BFD_RELOC_PPC_EMB_SDAI16
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- : BFD_RELOC_PPC_EMB_SDA2I16
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- : BFD_RELOC_PPC_EMB_SDA2REL
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- : BFD_RELOC_PPC_EMB_SDA21
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- : BFD_RELOC_PPC_EMB_MRKREF
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- : BFD_RELOC_PPC_EMB_RELSEC16
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- : BFD_RELOC_PPC_EMB_RELST_LO
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- : BFD_RELOC_PPC_EMB_RELST_HI
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- : BFD_RELOC_PPC_EMB_RELST_HA
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- : BFD_RELOC_PPC_EMB_BIT_FLD
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- : BFD_RELOC_PPC_EMB_RELSDA
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Power(rs6000) and PowerPC relocations.
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- : BFD_RELOC_CTOR
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The type of reloc used to build a contructor table - at the moment
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probably a 32 bit wide absolute relocation, but the target can
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choose. It generally does map to one of the other relocation
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types.
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- : BFD_RELOC_ARM_PCREL_BRANCH
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ARM 26 bit pc-relative branch. The lowest two bits must be zero
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and are not stored in the instruction.
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- : BFD_RELOC_ARM_IMMEDIATE
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- : BFD_RELOC_ARM_OFFSET_IMM
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- : BFD_RELOC_ARM_SHIFT_IMM
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- : BFD_RELOC_ARM_SWI
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- : BFD_RELOC_ARM_MULTI
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- : BFD_RELOC_ARM_CP_OFF_IMM
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- : BFD_RELOC_ARM_ADR_IMM
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- : BFD_RELOC_ARM_LDR_IMM
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- : BFD_RELOC_ARM_LITERAL
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- : BFD_RELOC_ARM_IN_POOL
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- : BFD_RELOC_ARM_OFFSET_IMM8
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- : BFD_RELOC_ARM_HWLITERAL
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- : BFD_RELOC_ARM_THUMB_ADD
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- : BFD_RELOC_ARM_THUMB_IMM
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- : BFD_RELOC_ARM_THUMB_SHIFT
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- : BFD_RELOC_ARM_THUMB_OFFSET
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These relocs are only used within the ARM assembler. They are not
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(at present) written to any object files.
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- : BFD_RELOC_SH_PCDISP8BY2
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- : BFD_RELOC_SH_PCDISP12BY2
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- : BFD_RELOC_SH_IMM4
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- : BFD_RELOC_SH_IMM4BY2
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- : BFD_RELOC_SH_IMM4BY4
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- : BFD_RELOC_SH_IMM8
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- : BFD_RELOC_SH_IMM8BY2
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- : BFD_RELOC_SH_IMM8BY4
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- : BFD_RELOC_SH_PCRELIMM8BY2
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- : BFD_RELOC_SH_PCRELIMM8BY4
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- : BFD_RELOC_SH_SWITCH16
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- : BFD_RELOC_SH_SWITCH32
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- : BFD_RELOC_SH_USES
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- : BFD_RELOC_SH_COUNT
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- : BFD_RELOC_SH_ALIGN
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- : BFD_RELOC_SH_CODE
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- : BFD_RELOC_SH_DATA
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- : BFD_RELOC_SH_LABEL
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Hitachi SH relocs. Not all of these appear in object files.
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- : BFD_RELOC_D10V_10_PCREL_R
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Mitsubishi D10V relocs. This is a 10-bit reloc with the right 2
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bits assumed to be 0.
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- : BFD_RELOC_D10V_10_PCREL_L
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Mitsubishi D10V relocs. This is a 10-bit reloc with the right 2
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bits assumed to be 0. This is the same as the previous reloc
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except it is in the left container, i.e., shifted left 15 bits.
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- : BFD_RELOC_D10V_18
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This is an 18-bit reloc with the right 2 bits assumed to be 0.
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- : BFD_RELOC_D10V_18_PCREL
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This is an 18-bit reloc with the right 2 bits assumed to be 0.
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- : BFD_RELOC_M32R_24
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Mitsubishi M32R relocs. This is a 24 bit absolute address.
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- : BFD_RELOC_M32R_10_PCREL
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This is a 10-bit pc-relative reloc with the right 2 bits assumed
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to be 0.
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- : BFD_RELOC_M32R_18_PCREL
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This is an 18-bit reloc with the right 2 bits assumed to be 0.
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- : BFD_RELOC_M32R_26_PCREL
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This is a 26-bit reloc with the right 2 bits assumed to be 0.
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- : BFD_RELOC_M32R_HI16_ULO
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This is a 16-bit reloc containing the high 16 bits of an address
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used when the lower 16 bits are treated as unsigned.
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- : BFD_RELOC_M32R_HI16_SLO
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This is a 16-bit reloc containing the high 16 bits of an address
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used when the lower 16 bits are treated as signed.
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- : BFD_RELOC_M32R_LO16
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This is a 16-bit reloc containing the lower 16 bits of an address.
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- : BFD_RELOC_M32R_SDA16
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This is a 16-bit reloc containing the small data area offset for
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use in add3, load, and store instructions.
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- : BFD_RELOC_MN10300_32_PCREL
|
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This is a 32bit pcrel reloc for the mn10300, offset by two bytes
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in the instruction.
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- : BFD_RELOC_MN10300_16_PCREL
|
||
This is a 16bit pcrel reloc for the mn10300, offset by two bytes
|
||
in the instruction.
|
||
.
|
||
typedef enum bfd_reloc_code_real bfd_reloc_code_real_type;
|
||
|
||
`bfd_reloc_type_lookup'
|
||
.......................
|
||
|
||
*Synopsis*
|
||
reloc_howto_type *
|
||
bfd_reloc_type_lookup (bfd *abfd, bfd_reloc_code_real_type code);
|
||
*Description*
|
||
Return a pointer to a howto structure which, when invoked, will perform
|
||
the relocation CODE on data from the architecture noted.
|
||
`bfd_default_reloc_type_lookup'
|
||
...............................
|
||
|
||
*Synopsis*
|
||
reloc_howto_type *bfd_default_reloc_type_lookup
|
||
(bfd *abfd, bfd_reloc_code_real_type code);
|
||
*Description*
|
||
Provides a default relocation lookup routine for any architecture.
|
||
`bfd_get_reloc_code_name'
|
||
.........................
|
||
|
||
*Synopsis*
|
||
const char *bfd_get_reloc_code_name (bfd_reloc_code_real_type code);
|
||
*Description*
|
||
Provides a printable name for the supplied relocation code. Useful
|
||
mainly for printing error messages.
|
||
`bfd_generic_relax_section'
|
||
...........................
|
||
|
||
*Synopsis*
|
||
boolean bfd_generic_relax_section
|
||
(bfd *abfd,
|
||
asection *section,
|
||
struct bfd_link_info *,
|
||
boolean *);
|
||
*Description*
|
||
Provides default handling for relaxing for back ends which don't do
|
||
relaxing - i.e., does nothing.
|
||
`bfd_generic_get_relocated_section_contents'
|
||
............................................
|
||
|
||
*Synopsis*
|
||
bfd_byte *
|
||
bfd_generic_get_relocated_section_contents (bfd *abfd,
|
||
struct bfd_link_info *link_info,
|
||
struct bfd_link_order *link_order,
|
||
bfd_byte *data,
|
||
boolean relocateable,
|
||
asymbol **symbols);
|
||
*Description*
|
||
Provides default handling of relocation effort for back ends which
|
||
can't be bothered to do it efficiently.
|
||
|
||
File: bfd.info, Node: Core Files, Next: Targets, Prev: Relocations, Up: BFD front end
|
||
|
||
Core files
|
||
==========
|
||
|
||
*Description*
|
||
These are functions pertaining to core files.
|
||
`bfd_core_file_failing_command'
|
||
...............................
|
||
|
||
*Synopsis*
|
||
CONST char *bfd_core_file_failing_command(bfd *abfd);
|
||
*Description*
|
||
Return a read-only string explaining which program was running when it
|
||
failed and produced the core file ABFD.
|
||
`bfd_core_file_failing_signal'
|
||
..............................
|
||
|
||
*Synopsis*
|
||
int bfd_core_file_failing_signal(bfd *abfd);
|
||
*Description*
|
||
Returns the signal number which caused the core dump which generated
|
||
the file the BFD ABFD is attached to.
|
||
`core_file_matches_executable_p'
|
||
................................
|
||
|
||
*Synopsis*
|
||
boolean core_file_matches_executable_p
|
||
(bfd *core_bfd, bfd *exec_bfd);
|
||
*Description*
|
||
Return `true' if the core file attached to CORE_BFD was generated by a
|
||
run of the executable file attached to EXEC_BFD, `false' otherwise.
|
||
|
||
File: bfd.info, Node: Targets, Next: Architectures, Prev: Core Files, Up: BFD front end
|
||
|
||
Targets
|
||
=======
|
||
|
||
*Description*
|
||
Each port of BFD to a different machine requries the creation of a
|
||
target back end. All the back end provides to the root part of BFD is a
|
||
structure containing pointers to functions which perform certain low
|
||
level operations on files. BFD translates the applications's requests
|
||
through a pointer into calls to the back end routines.
|
||
|
||
When a file is opened with `bfd_openr', its format and target are
|
||
unknown. BFD uses various mechanisms to determine how to interpret the
|
||
file. The operations performed are:
|
||
|
||
* Create a BFD by calling the internal routine `_bfd_new_bfd', then
|
||
call `bfd_find_target' with the target string supplied to
|
||
`bfd_openr' and the new BFD pointer.
|
||
|
||
* If a null target string was provided to `bfd_find_target', look up
|
||
the environment variable `GNUTARGET' and use that as the target
|
||
string.
|
||
|
||
* If the target string is still `NULL', or the target string is
|
||
`default', then use the first item in the target vector as the
|
||
target type, and set `target_defaulted' in the BFD to cause
|
||
`bfd_check_format' to loop through all the targets. *Note
|
||
bfd_target::. *Note Formats::.
|
||
|
||
* Otherwise, inspect the elements in the target vector one by one,
|
||
until a match on target name is found. When found, use it.
|
||
|
||
* Otherwise return the error `bfd_error_invalid_target' to
|
||
`bfd_openr'.
|
||
|
||
* `bfd_openr' attempts to open the file using `bfd_open_file', and
|
||
returns the BFD. Once the BFD has been opened and the target
|
||
selected, the file format may be determined. This is done by calling
|
||
`bfd_check_format' on the BFD with a suggested format. If
|
||
`target_defaulted' has been set, each possible target type is tried to
|
||
see if it recognizes the specified format. `bfd_check_format' returns
|
||
`true' when the caller guesses right.
|
||
|
||
* Menu:
|
||
|
||
* bfd_target::
|
||
|
||
|
||
File: bfd.info, Node: bfd_target, Prev: Targets, Up: Targets
|
||
|
||
bfd_target
|
||
----------
|
||
|
||
*Description*
|
||
This structure contains everything that BFD knows about a target. It
|
||
includes things like its byte order, name, and which routines to call
|
||
to do various operations.
|
||
|
||
Every BFD points to a target structure with its `xvec' member.
|
||
|
||
The macros below are used to dispatch to functions through the
|
||
`bfd_target' vector. They are used in a number of macros further down
|
||
in `bfd.h', and are also used when calling various routines by hand
|
||
inside the BFD implementation. The ARGLIST argument must be
|
||
parenthesized; it contains all the arguments to the called function.
|
||
|
||
They make the documentation (more) unpleasant to read, so if someone
|
||
wants to fix this and not break the above, please do.
|
||
#define BFD_SEND(bfd, message, arglist) \
|
||
((*((bfd)->xvec->message)) arglist)
|
||
|
||
#ifdef DEBUG_BFD_SEND
|
||
#undef BFD_SEND
|
||
#define BFD_SEND(bfd, message, arglist) \
|
||
(((bfd) && (bfd)->xvec && (bfd)->xvec->message) ? \
|
||
((*((bfd)->xvec->message)) arglist) : \
|
||
(bfd_assert (__FILE__,__LINE__), NULL))
|
||
#endif
|
||
For operations which index on the BFD format:
|
||
#define BFD_SEND_FMT(bfd, message, arglist) \
|
||
(((bfd)->xvec->message[(int)((bfd)->format)]) arglist)
|
||
|
||
#ifdef DEBUG_BFD_SEND
|
||
#undef BFD_SEND_FMT
|
||
#define BFD_SEND_FMT(bfd, message, arglist) \
|
||
(((bfd) && (bfd)->xvec && (bfd)->xvec->message) ? \
|
||
(((bfd)->xvec->message[(int)((bfd)->format)]) arglist) : \
|
||
(bfd_assert (__FILE__,__LINE__), NULL))
|
||
#endif
|
||
This is the structure which defines the type of BFD this is. The
|
||
`xvec' member of the struct `bfd' itself points here. Each module that
|
||
implements access to a different target under BFD, defines one of these.
|
||
|
||
FIXME, these names should be rationalised with the names of the
|
||
entry points which call them. Too bad we can't have one macro to define
|
||
them both!
|
||
enum bfd_flavour {
|
||
bfd_target_unknown_flavour,
|
||
bfd_target_aout_flavour,
|
||
bfd_target_coff_flavour,
|
||
bfd_target_ecoff_flavour,
|
||
bfd_target_elf_flavour,
|
||
bfd_target_ieee_flavour,
|
||
bfd_target_nlm_flavour,
|
||
bfd_target_oasys_flavour,
|
||
bfd_target_tekhex_flavour,
|
||
bfd_target_srec_flavour,
|
||
bfd_target_ihex_flavour,
|
||
bfd_target_som_flavour,
|
||
bfd_target_os9k_flavour,
|
||
bfd_target_versados_flavour,
|
||
bfd_target_msdos_flavour,
|
||
bfd_target_evax_flavour
|
||
};
|
||
|
||
enum bfd_endian { BFD_ENDIAN_BIG, BFD_ENDIAN_LITTLE, BFD_ENDIAN_UNKNOWN };
|
||
|
||
/* Forward declaration. */
|
||
typedef struct bfd_link_info _bfd_link_info;
|
||
|
||
typedef struct bfd_target
|
||
{
|
||
Identifies the kind of target, e.g., SunOS4, Ultrix, etc.
|
||
char *name;
|
||
The "flavour" of a back end is a general indication about the
|
||
contents of a file.
|
||
enum bfd_flavour flavour;
|
||
The order of bytes within the data area of a file.
|
||
enum bfd_endian byteorder;
|
||
The order of bytes within the header parts of a file.
|
||
enum bfd_endian header_byteorder;
|
||
A mask of all the flags which an executable may have set - from the
|
||
set `BFD_NO_FLAGS', `HAS_RELOC', ...`D_PAGED'.
|
||
flagword object_flags;
|
||
A mask of all the flags which a section may have set - from the set
|
||
`SEC_NO_FLAGS', `SEC_ALLOC', ...`SET_NEVER_LOAD'.
|
||
flagword section_flags;
|
||
The character normally found at the front of a symbol (if any),
|
||
perhaps `_'.
|
||
char symbol_leading_char;
|
||
The pad character for file names within an archive header.
|
||
char ar_pad_char;
|
||
The maximum number of characters in an archive header.
|
||
unsigned short ar_max_namelen;
|
||
Entries for byte swapping for data. These are different from the
|
||
other entry points, since they don't take a BFD asthe first argument.
|
||
Certain other handlers could do the same.
|
||
bfd_vma (*bfd_getx64) PARAMS ((const bfd_byte *));
|
||
bfd_signed_vma (*bfd_getx_signed_64) PARAMS ((const bfd_byte *));
|
||
void (*bfd_putx64) PARAMS ((bfd_vma, bfd_byte *));
|
||
bfd_vma (*bfd_getx32) PARAMS ((const bfd_byte *));
|
||
bfd_signed_vma (*bfd_getx_signed_32) PARAMS ((const bfd_byte *));
|
||
void (*bfd_putx32) PARAMS ((bfd_vma, bfd_byte *));
|
||
bfd_vma (*bfd_getx16) PARAMS ((const bfd_byte *));
|
||
bfd_signed_vma (*bfd_getx_signed_16) PARAMS ((const bfd_byte *));
|
||
void (*bfd_putx16) PARAMS ((bfd_vma, bfd_byte *));
|
||
Byte swapping for the headers
|
||
bfd_vma (*bfd_h_getx64) PARAMS ((const bfd_byte *));
|
||
bfd_signed_vma (*bfd_h_getx_signed_64) PARAMS ((const bfd_byte *));
|
||
void (*bfd_h_putx64) PARAMS ((bfd_vma, bfd_byte *));
|
||
bfd_vma (*bfd_h_getx32) PARAMS ((const bfd_byte *));
|
||
bfd_signed_vma (*bfd_h_getx_signed_32) PARAMS ((const bfd_byte *));
|
||
void (*bfd_h_putx32) PARAMS ((bfd_vma, bfd_byte *));
|
||
bfd_vma (*bfd_h_getx16) PARAMS ((const bfd_byte *));
|
||
bfd_signed_vma (*bfd_h_getx_signed_16) PARAMS ((const bfd_byte *));
|
||
void (*bfd_h_putx16) PARAMS ((bfd_vma, bfd_byte *));
|
||
Format dependent routines: these are vectors of entry points within
|
||
the target vector structure, one for each format to check.
|
||
|
||
Check the format of a file being read. Return a `bfd_target *' or
|
||
zero.
|
||
const struct bfd_target *(*_bfd_check_format[bfd_type_end]) PARAMS ((bfd *));
|
||
Set the format of a file being written.
|
||
boolean (*_bfd_set_format[bfd_type_end]) PARAMS ((bfd *));
|
||
Write cached information into a file being written, at `bfd_close'.
|
||
boolean (*_bfd_write_contents[bfd_type_end]) PARAMS ((bfd *));
|
||
The general target vector.
|
||
|
||
/* Generic entry points. */
|
||
#define BFD_JUMP_TABLE_GENERIC(NAME)\
|
||
CAT(NAME,_close_and_cleanup),\
|
||
CAT(NAME,_bfd_free_cached_info),\
|
||
CAT(NAME,_new_section_hook),\
|
||
CAT(NAME,_get_section_contents),\
|
||
CAT(NAME,_get_section_contents_in_window)
|
||
|
||
/* Called when the BFD is being closed to do any necessary cleanup. */
|
||
boolean (*_close_and_cleanup) PARAMS ((bfd *));
|
||
/* Ask the BFD to free all cached information. */
|
||
boolean (*_bfd_free_cached_info) PARAMS ((bfd *));
|
||
/* Called when a new section is created. */
|
||
boolean (*_new_section_hook) PARAMS ((bfd *, sec_ptr));
|
||
/* Read the contents of a section. */
|
||
boolean (*_bfd_get_section_contents) PARAMS ((bfd *, sec_ptr, PTR,
|
||
file_ptr, bfd_size_type));
|
||
boolean (*_bfd_get_section_contents_in_window)
|
||
PARAMS ((bfd *, sec_ptr, bfd_window *,
|
||
file_ptr, bfd_size_type));
|
||
|
||
/* Entry points to copy private data. */
|
||
#define BFD_JUMP_TABLE_COPY(NAME)\
|
||
CAT(NAME,_bfd_copy_private_bfd_data),\
|
||
CAT(NAME,_bfd_merge_private_bfd_data),\
|
||
CAT(NAME,_bfd_copy_private_section_data),\
|
||
CAT(NAME,_bfd_copy_private_symbol_data),\
|
||
CAT(NAME,_bfd_set_private_flags),\
|
||
CAT(NAME,_bfd_print_private_bfd_data)\
|
||
/* Called to copy BFD general private data from one object file
|
||
to another. */
|
||
boolean (*_bfd_copy_private_bfd_data) PARAMS ((bfd *, bfd *));
|
||
/* Called to merge BFD general private data from one object file
|
||
to a common output file when linking. */
|
||
boolean (*_bfd_merge_private_bfd_data) PARAMS ((bfd *, bfd *));
|
||
/* Called to copy BFD private section data from one object file
|
||
to another. */
|
||
boolean (*_bfd_copy_private_section_data) PARAMS ((bfd *, sec_ptr,
|
||
bfd *, sec_ptr));
|
||
/* Called to copy BFD private symbol data from one symbol
|
||
to another. */
|
||
boolean (*_bfd_copy_private_symbol_data) PARAMS ((bfd *, asymbol *,
|
||
bfd *, asymbol *));
|
||
/* Called to set private backend flags */
|
||
boolean (*_bfd_set_private_flags) PARAMS ((bfd *, flagword));
|
||
|
||
/* Called to print private BFD data */
|
||
boolean (*_bfd_print_private_bfd_data) PARAMS ((bfd *, PTR));
|
||
|
||
/* Core file entry points. */
|
||
#define BFD_JUMP_TABLE_CORE(NAME)\
|
||
CAT(NAME,_core_file_failing_command),\
|
||
CAT(NAME,_core_file_failing_signal),\
|
||
CAT(NAME,_core_file_matches_executable_p)
|
||
char * (*_core_file_failing_command) PARAMS ((bfd *));
|
||
int (*_core_file_failing_signal) PARAMS ((bfd *));
|
||
boolean (*_core_file_matches_executable_p) PARAMS ((bfd *, bfd *));
|
||
|
||
/* Archive entry points. */
|
||
#define BFD_JUMP_TABLE_ARCHIVE(NAME)\
|
||
CAT(NAME,_slurp_armap),\
|
||
CAT(NAME,_slurp_extended_name_table),\
|
||
CAT(NAME,_construct_extended_name_table),\
|
||
CAT(NAME,_truncate_arname),\
|
||
CAT(NAME,_write_armap),\
|
||
CAT(NAME,_read_ar_hdr),\
|
||
CAT(NAME,_openr_next_archived_file),\
|
||
CAT(NAME,_get_elt_at_index),\
|
||
CAT(NAME,_generic_stat_arch_elt),\
|
||
CAT(NAME,_update_armap_timestamp)
|
||
boolean (*_bfd_slurp_armap) PARAMS ((bfd *));
|
||
boolean (*_bfd_slurp_extended_name_table) PARAMS ((bfd *));
|
||
boolean (*_bfd_construct_extended_name_table)
|
||
PARAMS ((bfd *, char **, bfd_size_type *, const char **));
|
||
void (*_bfd_truncate_arname) PARAMS ((bfd *, CONST char *, char *));
|
||
boolean (*write_armap) PARAMS ((bfd *arch,
|
||
unsigned int elength,
|
||
struct orl *map,
|
||
unsigned int orl_count,
|
||
int stridx));
|
||
PTR (*_bfd_read_ar_hdr_fn) PARAMS ((bfd *));
|
||
bfd * (*openr_next_archived_file) PARAMS ((bfd *arch, bfd *prev));
|
||
#define bfd_get_elt_at_index(b,i) BFD_SEND(b, _bfd_get_elt_at_index, (b,i))
|
||
bfd * (*_bfd_get_elt_at_index) PARAMS ((bfd *, symindex));
|
||
int (*_bfd_stat_arch_elt) PARAMS ((bfd *, struct stat *));
|
||
boolean (*_bfd_update_armap_timestamp) PARAMS ((bfd *));
|
||
|
||
/* Entry points used for symbols. */
|
||
#define BFD_JUMP_TABLE_SYMBOLS(NAME)\
|
||
CAT(NAME,_get_symtab_upper_bound),\
|
||
CAT(NAME,_get_symtab),\
|
||
CAT(NAME,_make_empty_symbol),\
|
||
CAT(NAME,_print_symbol),\
|
||
CAT(NAME,_get_symbol_info),\
|
||
CAT(NAME,_bfd_is_local_label_name),\
|
||
CAT(NAME,_get_lineno),\
|
||
CAT(NAME,_find_nearest_line),\
|
||
CAT(NAME,_bfd_make_debug_symbol),\
|
||
CAT(NAME,_read_minisymbols),\
|
||
CAT(NAME,_minisymbol_to_symbol)
|
||
long (*_bfd_get_symtab_upper_bound) PARAMS ((bfd *));
|
||
long (*_bfd_canonicalize_symtab) PARAMS ((bfd *,
|
||
struct symbol_cache_entry **));
|
||
struct symbol_cache_entry *
|
||
(*_bfd_make_empty_symbol) PARAMS ((bfd *));
|
||
void (*_bfd_print_symbol) PARAMS ((bfd *, PTR,
|
||
struct symbol_cache_entry *,
|
||
bfd_print_symbol_type));
|
||
#define bfd_print_symbol(b,p,s,e) BFD_SEND(b, _bfd_print_symbol, (b,p,s,e))
|
||
void (*_bfd_get_symbol_info) PARAMS ((bfd *,
|
||
struct symbol_cache_entry *,
|
||
symbol_info *));
|
||
#define bfd_get_symbol_info(b,p,e) BFD_SEND(b, _bfd_get_symbol_info, (b,p,e))
|
||
boolean (*_bfd_is_local_label_name) PARAMS ((bfd *, const char *));
|
||
|
||
alent * (*_get_lineno) PARAMS ((bfd *, struct symbol_cache_entry *));
|
||
boolean (*_bfd_find_nearest_line) PARAMS ((bfd *abfd,
|
||
struct sec *section, struct symbol_cache_entry **symbols,
|
||
bfd_vma offset, CONST char **file, CONST char **func,
|
||
unsigned int *line));
|
||
/* Back-door to allow format-aware applications to create debug symbols
|
||
while using BFD for everything else. Currently used by the assembler
|
||
when creating COFF files. */
|
||
asymbol * (*_bfd_make_debug_symbol) PARAMS ((
|
||
bfd *abfd,
|
||
void *ptr,
|
||
unsigned long size));
|
||
#define bfd_read_minisymbols(b, d, m, s) \
|
||
BFD_SEND (b, _read_minisymbols, (b, d, m, s))
|
||
long (*_read_minisymbols) PARAMS ((bfd *, boolean, PTR *,
|
||
unsigned int *));
|
||
#define bfd_minisymbol_to_symbol(b, d, m, f) \
|
||
BFD_SEND (b, _minisymbol_to_symbol, (b, d, m, f))
|
||
asymbol *(*_minisymbol_to_symbol) PARAMS ((bfd *, boolean, const PTR,
|
||
asymbol *));
|
||
|
||
/* Routines for relocs. */
|
||
#define BFD_JUMP_TABLE_RELOCS(NAME)\
|
||
CAT(NAME,_get_reloc_upper_bound),\
|
||
CAT(NAME,_canonicalize_reloc),\
|
||
CAT(NAME,_bfd_reloc_type_lookup)
|
||
long (*_get_reloc_upper_bound) PARAMS ((bfd *, sec_ptr));
|
||
long (*_bfd_canonicalize_reloc) PARAMS ((bfd *, sec_ptr, arelent **,
|
||
struct symbol_cache_entry **));
|
||
/* See documentation on reloc types. */
|
||
reloc_howto_type *
|
||
(*reloc_type_lookup) PARAMS ((bfd *abfd,
|
||
bfd_reloc_code_real_type code));
|
||
|
||
/* Routines used when writing an object file. */
|
||
#define BFD_JUMP_TABLE_WRITE(NAME)\
|
||
CAT(NAME,_set_arch_mach),\
|
||
CAT(NAME,_set_section_contents)
|
||
boolean (*_bfd_set_arch_mach) PARAMS ((bfd *, enum bfd_architecture,
|
||
unsigned long));
|
||
boolean (*_bfd_set_section_contents) PARAMS ((bfd *, sec_ptr, PTR,
|
||
file_ptr, bfd_size_type));
|
||
|
||
/* Routines used by the linker. */
|
||
#define BFD_JUMP_TABLE_LINK(NAME)\
|
||
CAT(NAME,_sizeof_headers),\
|
||
CAT(NAME,_bfd_get_relocated_section_contents),\
|
||
CAT(NAME,_bfd_relax_section),\
|
||
CAT(NAME,_bfd_link_hash_table_create),\
|
||
CAT(NAME,_bfd_link_add_symbols),\
|
||
CAT(NAME,_bfd_final_link),\
|
||
CAT(NAME,_bfd_link_split_section)
|
||
int (*_bfd_sizeof_headers) PARAMS ((bfd *, boolean));
|
||
bfd_byte * (*_bfd_get_relocated_section_contents) PARAMS ((bfd *,
|
||
struct bfd_link_info *, struct bfd_link_order *,
|
||
bfd_byte *data, boolean relocateable,
|
||
struct symbol_cache_entry **));
|
||
|
||
boolean (*_bfd_relax_section) PARAMS ((bfd *, struct sec *,
|
||
struct bfd_link_info *, boolean *again));
|
||
|
||
/* Create a hash table for the linker. Different backends store
|
||
different information in this table. */
|
||
struct bfd_link_hash_table *(*_bfd_link_hash_table_create) PARAMS ((bfd *));
|
||
|
||
/* Add symbols from this object file into the hash table. */
|
||
boolean (*_bfd_link_add_symbols) PARAMS ((bfd *, struct bfd_link_info *));
|
||
|
||
/* Do a link based on the link_order structures attached to each
|
||
section of the BFD. */
|
||
boolean (*_bfd_final_link) PARAMS ((bfd *, struct bfd_link_info *));
|
||
|
||
/* Should this section be split up into smaller pieces during linking. */
|
||
boolean (*_bfd_link_split_section) PARAMS ((bfd *, struct sec *));
|
||
|
||
/* Routines to handle dynamic symbols and relocs. */
|
||
#define BFD_JUMP_TABLE_DYNAMIC(NAME)\
|
||
CAT(NAME,_get_dynamic_symtab_upper_bound),\
|
||
CAT(NAME,_canonicalize_dynamic_symtab),\
|
||
CAT(NAME,_get_dynamic_reloc_upper_bound),\
|
||
CAT(NAME,_canonicalize_dynamic_reloc)
|
||
/* Get the amount of memory required to hold the dynamic symbols. */
|
||
long (*_bfd_get_dynamic_symtab_upper_bound) PARAMS ((bfd *));
|
||
/* Read in the dynamic symbols. */
|
||
long (*_bfd_canonicalize_dynamic_symtab)
|
||
PARAMS ((bfd *, struct symbol_cache_entry **));
|
||
/* Get the amount of memory required to hold the dynamic relocs. */
|
||
long (*_bfd_get_dynamic_reloc_upper_bound) PARAMS ((bfd *));
|
||
/* Read in the dynamic relocs. */
|
||
long (*_bfd_canonicalize_dynamic_reloc)
|
||
PARAMS ((bfd *, arelent **, struct symbol_cache_entry **));
|
||
Data for use by back-end routines, which isn't generic enough to
|
||
belong in this structure.
|
||
PTR backend_data;
|
||
} bfd_target;
|
||
|
||
`bfd_set_default_target'
|
||
........................
|
||
|
||
*Synopsis*
|
||
boolean bfd_set_default_target (const char *name);
|
||
*Description*
|
||
Set the default target vector to use when recognizing a BFD. This
|
||
takes the name of the target, which may be a BFD target name or a
|
||
configuration triplet.
|
||
`bfd_find_target'
|
||
.................
|
||
|
||
*Synopsis*
|
||
const bfd_target *bfd_find_target(CONST char *target_name, bfd *abfd);
|
||
*Description*
|
||
Return a pointer to the transfer vector for the object target named
|
||
TARGET_NAME. If TARGET_NAME is `NULL', choose the one in the
|
||
environment variable `GNUTARGET'; if that is null or not defined, then
|
||
choose the first entry in the target list. Passing in the string
|
||
"default" or setting the environment variable to "default" will cause
|
||
the first entry in the target list to be returned, and
|
||
"target_defaulted" will be set in the BFD. This causes
|
||
`bfd_check_format' to loop over all the targets to find the one that
|
||
matches the file being read.
|
||
`bfd_target_list'
|
||
.................
|
||
|
||
*Synopsis*
|
||
const char **bfd_target_list(void);
|
||
*Description*
|
||
Return a freshly malloced NULL-terminated vector of the names of all
|
||
the valid BFD targets. Do not modify the names.
|
||
|
||
File: bfd.info, Node: Architectures, Next: Opening and Closing, Prev: Targets, Up: BFD front end
|
||
|
||
Architectures
|
||
=============
|
||
|
||
BFD keeps one atom in a BFD describing the architecture of the data
|
||
attached to the BFD: a pointer to a `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
|
||
`SELECT_ARCHITECTURES'. This is normally set up in the
|
||
`config/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 `archures.c'.
|
||
bfd_architecture
|
||
----------------
|
||
|
||
*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.
|
||
enum bfd_architecture
|
||
{
|
||
bfd_arch_unknown, /* File arch not known */
|
||
bfd_arch_obscure, /* Arch known, not one of these */
|
||
bfd_arch_m68k, /* Motorola 68xxx */
|
||
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_a29k, /* AMD 29000 */
|
||
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_v9 6
|
||
#define bfd_mach_sparc_v9a 7 /* with ultrasparc 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_v9a)
|
||
bfd_arch_mips, /* MIPS Rxxxx */
|
||
bfd_arch_i386, /* Intel 386 */
|
||
#define bfd_mach_i386_i386 0
|
||
#define bfd_mach_i386_i8086 1
|
||
bfd_arch_we32k, /* AT&T WE32xxx */
|
||
bfd_arch_tahoe, /* CCI/Harris Tahoe */
|
||
bfd_arch_i860, /* Intel 860 */
|
||
bfd_arch_romp, /* IBM ROMP PC/RT */
|
||
bfd_arch_alliant, /* Alliant */
|
||
bfd_arch_convex, /* Convex */
|
||
bfd_arch_m88k, /* Motorola 88xxx */
|
||
bfd_arch_pyramid, /* Pyramid Technology */
|
||
bfd_arch_h8300, /* Hitachi H8/300 */
|
||
#define bfd_mach_h8300 1
|
||
#define bfd_mach_h8300h 2
|
||
#define bfd_mach_h8300s 3
|
||
bfd_arch_powerpc, /* PowerPC */
|
||
bfd_arch_rs6000, /* IBM RS/6000 */
|
||
bfd_arch_hppa, /* HP PA RISC */
|
||
bfd_arch_d10v, /* Mitsubishi D10V */
|
||
bfd_arch_z8k, /* Zilog Z8000 */
|
||
#define bfd_mach_z8001 1
|
||
#define bfd_mach_z8002 2
|
||
bfd_arch_h8500, /* Hitachi H8/500 */
|
||
bfd_arch_sh, /* Hitachi SH */
|
||
bfd_arch_alpha, /* Dec Alpha */
|
||
bfd_arch_arm, /* Advanced Risc Machines ARM */
|
||
bfd_arch_ns32k, /* National Semiconductors ns32000 */
|
||
bfd_arch_w65, /* WDC 65816 */
|
||
bfd_arch_m32r, /* Mitsubishi M32R/D */
|
||
bfd_arch_mn10200, /* Matsushita MN10200 */
|
||
bfd_arch_mn10300, /* Matsushita MN10300 */
|
||
bfd_arch_last
|
||
};
|
||
|
||
bfd_arch_info
|
||
-------------
|
||
|
||
*Description*
|
||
This structure contains information on architectures for use within BFD.
|
||
|
||
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 */
|
||
boolean the_default;
|
||
const struct bfd_arch_info * (*compatible)
|
||
PARAMS ((const struct bfd_arch_info *a,
|
||
const struct bfd_arch_info *b));
|
||
|
||
boolean (*scan) PARAMS ((const struct bfd_arch_info *, const char *));
|
||
|
||
const struct bfd_arch_info *next;
|
||
} bfd_arch_info_type;
|
||
|
||
`bfd_printable_name'
|
||
....................
|
||
|
||
*Synopsis*
|
||
const char *bfd_printable_name(bfd *abfd);
|
||
*Description*
|
||
Return a printable string representing the architecture and machine
|
||
from the pointer to the architecture info structure.
|
||
`bfd_scan_arch'
|
||
...............
|
||
|
||
*Synopsis*
|
||
const bfd_arch_info_type *bfd_scan_arch(const char *string);
|
||
*Description*
|
||
Figure out if BFD supports any cpu which could be described with the
|
||
name STRING. Return a pointer to an `arch_info' structure if a machine
|
||
is found, otherwise NULL.
|
||
`bfd_arch_get_compatible'
|
||
.........................
|
||
|
||
*Synopsis*
|
||
const bfd_arch_info_type *bfd_arch_get_compatible(
|
||
const bfd *abfd,
|
||
const bfd *bbfd);
|
||
*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 `arch_info' structure describing the compatible machine.
|
||
`bfd_default_arch_struct'
|
||
.........................
|
||
|
||
*Description*
|
||
The `bfd_default_arch_struct' is an item of `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.
|
||
extern const bfd_arch_info_type bfd_default_arch_struct;
|
||
|
||
`bfd_set_arch_info'
|
||
...................
|
||
|
||
*Synopsis*
|
||
void bfd_set_arch_info(bfd *abfd, const bfd_arch_info_type *arg);
|
||
*Description*
|
||
Set the architecture info of ABFD to ARG.
|
||
`bfd_default_set_arch_mach'
|
||
...........................
|
||
|
||
*Synopsis*
|
||
boolean bfd_default_set_arch_mach(bfd *abfd,
|
||
enum bfd_architecture arch,
|
||
unsigned long mach);
|
||
*Description*
|
||
Set the architecture and machine type in BFD ABFD to ARCH and MACH.
|
||
Find the correct pointer to a structure and insert it into the
|
||
`arch_info' pointer.
|
||
`bfd_get_arch'
|
||
..............
|
||
|
||
*Synopsis*
|
||
enum bfd_architecture bfd_get_arch(bfd *abfd);
|
||
*Description*
|
||
Return the enumerated type which describes the BFD ABFD's architecture.
|
||
`bfd_get_mach'
|
||
..............
|
||
|
||
*Synopsis*
|
||
unsigned long bfd_get_mach(bfd *abfd);
|
||
*Description*
|
||
Return the long type which describes the BFD ABFD's machine.
|
||
`bfd_arch_bits_per_byte'
|
||
........................
|
||
|
||
*Synopsis*
|
||
unsigned int bfd_arch_bits_per_byte(bfd *abfd);
|
||
*Description*
|
||
Return the number of bits in one of the BFD ABFD's architecture's bytes.
|
||
`bfd_arch_bits_per_address'
|
||
...........................
|
||
|
||
*Synopsis*
|
||
unsigned int bfd_arch_bits_per_address(bfd *abfd);
|
||
*Description*
|
||
Return the number of bits in one of the BFD ABFD's architecture's
|
||
addresses.
|
||
`bfd_default_compatible'
|
||
........................
|
||
|
||
*Synopsis*
|
||
const bfd_arch_info_type *bfd_default_compatible
|
||
(const bfd_arch_info_type *a,
|
||
const bfd_arch_info_type *b);
|
||
*Description*
|
||
The default function for testing for compatibility.
|
||
`bfd_default_scan'
|
||
..................
|
||
|
||
*Synopsis*
|
||
boolean bfd_default_scan(const struct bfd_arch_info *info, const char *string);
|
||
*Description*
|
||
The default function for working out whether this is an architecture
|
||
hit and a machine hit.
|
||
`bfd_get_arch_info'
|
||
...................
|
||
|
||
*Synopsis*
|
||
const bfd_arch_info_type * bfd_get_arch_info(bfd *abfd);
|
||
*Description*
|
||
Return the architecture info struct in ABFD.
|
||
`bfd_lookup_arch'
|
||
.................
|
||
|
||
*Synopsis*
|
||
const bfd_arch_info_type *bfd_lookup_arch
|
||
(enum bfd_architecture
|
||
arch,
|
||
unsigned long machine);
|
||
*Description*
|
||
Look for the architecure info structure which matches the arguments
|
||
ARCH and MACHINE. A machine of 0 matches the machine/architecture
|
||
structure which marks itself as the default.
|
||
`bfd_printable_arch_mach'
|
||
.........................
|
||
|
||
*Synopsis*
|
||
const char *bfd_printable_arch_mach
|
||
(enum bfd_architecture arch, unsigned long machine);
|
||
*Description*
|
||
Return a printable string representing the architecture and machine
|
||
type.
|
||
|
||
This routine is depreciated.
|
||
|
||
File: bfd.info, Node: Opening and Closing, Next: Internal, Prev: Architectures, Up: BFD front end
|
||
|
||
Opening and closing BFDs
|
||
========================
|
||
|
||
`bfd_openr'
|
||
...........
|
||
|
||
*Synopsis*
|
||
bfd *bfd_openr(CONST char *filename, CONST char *target);
|
||
*Description*
|
||
Open the file FILENAME (using `fopen') with the target TARGET. Return
|
||
a pointer to the created BFD.
|
||
|
||
Calls `bfd_find_target', so TARGET is interpreted as by that
|
||
function.
|
||
|
||
If `NULL' is returned then an error has occured. Possible errors
|
||
are `bfd_error_no_memory', `bfd_error_invalid_target' or `system_call'
|
||
error.
|
||
`bfd_fdopenr'
|
||
.............
|
||
|
||
*Synopsis*
|
||
bfd *bfd_fdopenr(CONST char *filename, CONST char *target, int fd);
|
||
*Description*
|
||
`bfd_fdopenr' is to `bfd_fopenr' much like `fdopen' is to `fopen'. It
|
||
opens a BFD on a file already described by the FD supplied.
|
||
|
||
When the file is later `bfd_close'd, the file descriptor will be
|
||
closed.
|
||
|
||
If the caller desires that this file descriptor be cached by BFD
|
||
(opened as needed, closed as needed to free descriptors for other
|
||
opens), with the supplied FD used as an initial file descriptor (but
|
||
subject to closure at any time), call bfd_set_cacheable(bfd, 1) on the
|
||
returned BFD. The default is to assume no cacheing; the file
|
||
descriptor will remain open until `bfd_close', and will not be affected
|
||
by BFD operations on other files.
|
||
|
||
Possible errors are `bfd_error_no_memory',
|
||
`bfd_error_invalid_target' and `bfd_error_system_call'.
|
||
`bfd_openstreamr'
|
||
.................
|
||
|
||
*Synopsis*
|
||
bfd *bfd_openstreamr(const char *, const char *, PTR);
|
||
*Description*
|
||
Open a BFD for read access on an existing stdio stream. When the BFD
|
||
is passed to `bfd_close', the stream will be closed.
|
||
`bfd_openw'
|
||
...........
|
||
|
||
*Synopsis*
|
||
bfd *bfd_openw(CONST char *filename, CONST char *target);
|
||
*Description*
|
||
Create a BFD, associated with file FILENAME, using the file format
|
||
TARGET, and return a pointer to it.
|
||
|
||
Possible errors are `bfd_error_system_call', `bfd_error_no_memory',
|
||
`bfd_error_invalid_target'.
|
||
`bfd_close'
|
||
...........
|
||
|
||
*Synopsis*
|
||
boolean bfd_close(bfd *abfd);
|
||
*Description*
|
||
Close a BFD. If the BFD was open for writing, then pending operations
|
||
are completed and the file written out and closed. If the created file
|
||
is executable, then `chmod' is called to mark it as such.
|
||
|
||
All memory attached to the BFD is released.
|
||
|
||
The file descriptor associated with the BFD is closed (even if it
|
||
was passed in to BFD by `bfd_fdopenr').
|
||
*Returns*
|
||
`true' is returned if all is ok, otherwise `false'.
|
||
`bfd_close_all_done'
|
||
....................
|
||
|
||
*Synopsis*
|
||
boolean bfd_close_all_done(bfd *);
|
||
*Description*
|
||
Close a BFD. Differs from `bfd_close' since it does not complete any
|
||
pending operations. This routine would be used if the application had
|
||
just used BFD for swapping and didn't want to use any of the writing
|
||
code.
|
||
|
||
If the created file is executable, then `chmod' is called to mark it
|
||
as such.
|
||
|
||
All memory attached to the BFD is released.
|
||
*Returns*
|
||
`true' is returned if all is ok, otherwise `false'.
|
||
`bfd_create'
|
||
............
|
||
|
||
*Synopsis*
|
||
bfd *bfd_create(CONST char *filename, bfd *templ);
|
||
*Description*
|
||
Create a new BFD in the manner of `bfd_openw', but without opening a
|
||
file. The new BFD takes the target from the target used by TEMPLATE. The
|
||
format is always set to `bfd_object'.
|
||
`bfd_alloc'
|
||
...........
|
||
|
||
*Synopsis*
|
||
PTR bfd_alloc (bfd *abfd, size_t wanted);
|
||
*Description*
|
||
Allocate a block of WANTED bytes of memory attached to `abfd' and
|
||
return a pointer to it.
|