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