[PATCH] D17601: [ELF] - Define special symbols _etext and _edata

[George Rimar via llvm-commits]

grimar created this revision.
grimar added reviewers: ruiu, rafael.
grimar added subscribers: llvm-commits, grimar.

Description of symbols is avalable here:
https://docs.oracle.com/cd/E53394_01/html/E54766/u-etext-3c.html

It is said that:
_etext - The address of _etext is the first location after the last read-only loadable segment.
_edata - The address of _edata is the first location after the last read-write loadable segment.
_end - If the address of _edata is greater than the address of _etext, the address of _end is same as the address of _edata.

In real life _end and _edata has different values for that case. Both gold/bfd set _edata to address of .bss
This patch do the same for consistency.


http://reviews.llvm.org/D17601

Files:
  ELF/Symbols.cpp
  ELF/Symbols.h
  ELF/Writer.cpp
  test/ELF/edata-etext.s

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