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| author | Simon Atanasyan <simon@atanasyan.com> | 2016-03-02 05:38:42 +0000 |
|---|---|---|
| committer | Simon Atanasyan <simon@atanasyan.com> | 2016-03-02 05:38:42 +0000 |
| commit | ea423e261fb45dfbebb7a1d73570dc60268cc979 (patch) | |
| tree | 7aa027216b92284599b382d899bdab3f21216b96 /llvm/lib | |
| parent | 61205070c457653961bdd5ce513f31f29a73e068 (diff) | |
| download | bcm5719-llvm-ea423e261fb45dfbebb7a1d73570dc60268cc979.tar.gz bcm5719-llvm-ea423e261fb45dfbebb7a1d73570dc60268cc979.zip | |
[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
Diffstat (limited to 'llvm/lib')
0 files changed, 0 insertions, 0 deletions
