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| author | Simon Atanasyan <simon@atanasyan.com> | 2016-10-21 07:22:30 +0000 |
|---|---|---|
| committer | Simon Atanasyan <simon@atanasyan.com> | 2016-10-21 07:22:30 +0000 |
| commit | bed04bf1df9d442f4a8e4d914d0dcd9155f2b931 (patch) | |
| tree | 57eed9ee55e416965099b4be23be081c3a8f03aa /clang/lib/Sema/SemaExpr.cpp | |
| parent | c1db0db8647110c89924e6a29afe6455ed61a2a5 (diff) | |
| download | bcm5719-llvm-bed04bf1df9d442f4a8e4d914d0dcd9155f2b931.tar.gz bcm5719-llvm-bed04bf1df9d442f4a8e4d914d0dcd9155f2b931.zip | |
[ELF][MIPS] Put local GOT entries accessed via a 16-bit index first
Some MIPS relocations used to access GOT entries are able to manipulate
16-bit index. The other ones like R_MIPS_CALL_HI16/LO16 can handle
32-bit indexes. 16-bit relocations are generated by default. The 32-bit
relocations are generated by -mxgot flag passed to compiler. Usually
these relocation are not mixed in the same code but files like crt*.o
contain 16-bit relocations so even if all "user's" code compiled with
-mxgot flag a few 16-bit relocations might come to the linking phase.
Now LLD does not differentiate local GOT entries accessed via a 16-bit
and 32-bit indexes. That might lead to relocation's overflow if 16-bit
entries are allocated to far from the beginning of the GOT.
The patch introduces new "part" of MIPS GOT dedicated to the local GOT
entries accessed by 32-bit relocations. That allows to put local GOT
entries accessed via a 16-bit index first and escape relocation's overflow.
Differential revision: https://reviews.llvm.org/D25833
llvm-svn: 284809
Diffstat (limited to 'clang/lib/Sema/SemaExpr.cpp')
0 files changed, 0 insertions, 0 deletions
