mirror of https://github.com/Nonannet/pelfy.git
29 lines
1.6 KiB
Markdown
29 lines
1.6 KiB
Markdown
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# ELF for ARM
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http://netwinder.osuosl.org/pub/netwinder/docs/arm/ARMELFA06.pdf (page 32)
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From https://simplemachines.it/doc/aaelf.pdf
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The computation that must be performed in order to determine the relocation result. The following
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nomenclature is used
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- S denotes the value of symbol referenced in ELF32_R_SYM component of the r_info field.
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- A denotes the initial addend. For a RELA type relocation the value is used unmodified. For a REL type
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relocation the value must be extracted from the place in a manner that is determined by the type of the
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place.
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- P denotes the address of the place being relocated. It is the sum of the r_offset field and the base
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address of the section being relocated (note that all relocations involving P are of the form S – P, where
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the symbol referenced is in the same consolidated output section as P, so it is not necessary to know the
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absolute address of the section being relocated).
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ELF for the ARM Architecture
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GENC-003538 v0.3 DRAFT Page 14 of 17
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- B is the nominal base address used for accessing objects in the read-write data areas.
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- E is the nominal base address used for accessing objects in the executable and read-only areas.
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The precise definition of a nominal base address is platform defined, but it must be possible for the application to
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retrieve the value at run time by one of the following methods:
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! A pre-determined value
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! A value in a known register
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! A suitable symbol
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! A library call
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The platform documentation must describe the appropriate model for each of B and E (they need not be the
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same).
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# RISC V
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https://github.com/riscv-non-isa/riscv-elf-psabi-doc/blob/master/riscv-elf.adoc
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