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Commit Graph

Author	SHA1	Message	Date
Rafael Espindola	a22b082e46	Always create a .got on mips. The _gp* family of symbols is defined as an offset in .got, and it is not at all clear what should happen when .got is not defined. This will allow some simplifications on how these symbols are handled. llvm-svn: 266063	2016-04-12 13:21:13 +00:00
Simon Atanasyan	ea423e261f	[ELF] Fix reading of PC values of FDEs The patch fixes two related problems: - If CIE augmentation string has 'L' token the CIE contains a byte defines LSDA encoding. We should skip this byte in `getFdeEncoding` routine. Before this fix we do not skip it and if the next token is 'R' treat this byte as FDE encoding. - FDE encoding format has separate flags e.g. DW_EH_PE_pcrel for definition of relative pointers. We should add .eh_frame address to the PC value iif the DW_EH_PE_pcrel is specified. http://www.airs.com/blog/archives/460 There is one more not fixed problem in this code. If PC value is encoded using signed relative format e.g. DW_EH_PE_sdata4 \| DW_EH_PE_pcrel we should sign extend result of read32 to perform calculation correctly. I am going to fix that in a separate patch. Differential Revision: http://reviews.llvm.org/D17733 llvm-svn: 262461	2016-03-02 05:38:42 +00:00

Author

SHA1

Message

Date

Rafael Espindola

a22b082e46

Always create a .got on mips.

The _gp* family of symbols is defined as an offset in .got, and it is
not at all clear what should happen when .got is not defined.

This will allow some simplifications on how these symbols are handled.

llvm-svn: 266063

2016-04-12 13:21:13 +00:00

Simon Atanasyan

ea423e261f

[ELF] Fix reading of PC values of FDEs

The patch fixes two related problems:
- If CIE augmentation string has 'L' token the CIE contains a byte
  defines LSDA encoding. We should skip this byte in `getFdeEncoding`
  routine. Before this fix we do not skip it and if the next token
  is 'R' treat this byte as FDE encoding.
- FDE encoding format has separate flags e.g. DW_EH_PE_pcrel for
  definition of relative pointers. We should add .eh_frame address to
  the PC value iif the DW_EH_PE_pcrel is specified.

http://www.airs.com/blog/archives/460

There is one more not fixed problem in this code. If PC value is encoded
using signed relative format e.g. DW_EH_PE_sdata4 | DW_EH_PE_pcrel we
should sign extend result of read32 to perform calculation correctly.
I am going to fix that in a separate patch.

Differential Revision: http://reviews.llvm.org/D17733

llvm-svn: 262461

2016-03-02 05:38:42 +00:00

2 Commits