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Commit Graph

Author	SHA1	Message	Date
Simon Atanasyan	49bc69b9bb	[ELF][MIPS] Enumerate absolute MIPS relocations in the isRelRelative This commit does two related thing. At first, it enumerates supported absolute MIPS relocations in the `MipsTargetInfo<ELFT>::isRelRelative` method. In that case the code is shorter and the case switch does not tend to grow. At second, it prevents R_MIPS_COPY and PLT creation for relative relocations. For almost all relative MIPS relocations like R_MIPS_PC19_S2, R_MIPS_PCHI16 etc it does not have a sence. The only exception is R_MIPS_PC32. GNU linker creates a copy relocation or PLT entry for it. But I could not find any real test case uses R_MIPS_PC32 with DSO defined symbol as a target. So for now I prefer to skip this case to simplify the LLD code. llvm-svn: 261822	2016-02-25 05:03:52 +00:00
Simon Atanasyan	2287dc3bf8	[ELF][MIPS] Add lazy relocation support for MIPS The patch adds lazy relocation support for MIPS and R_MIPS_26 relocation handing. R_MIPS_26 relocation might require PLT entry creation. In that case it is fully supported by the patch. But if the relocation target is a local symbol we need to use a different expression to calculate the relocation result. This case is not implemented yet because there is no method to get know the kind of relocation target in the `relocateOne` routine. Differential Revision: http://reviews.llvm.org/D16982 llvm-svn: 260424	2016-02-10 19:57:19 +00:00
Simon Atanasyan	e1bfc2e793	[ELF][MIPS] Support R_MIPS_COPY relocation Generate R_MIPS_COPY relocation for 'static' relocations against object symbols defined in a shared libraries. llvm-svn: 260083	2016-02-08 10:05:13 +00:00

Author

SHA1

Message

Date

Simon Atanasyan

49bc69b9bb

[ELF][MIPS] Enumerate absolute MIPS relocations in the isRelRelative

This commit does two related thing. At first, it enumerates supported
absolute MIPS relocations in the `MipsTargetInfo<ELFT>::isRelRelative`
method. In that case the code is shorter and the case switch does not
tend to grow. At second, it prevents R_MIPS_COPY and PLT creation for
relative relocations. For almost all relative MIPS relocations like
R_MIPS_PC19_S2, R_MIPS_PCHI16 etc it does not have a sence. The only
exception is R_MIPS_PC32. GNU linker creates a copy relocation or PLT
entry for it. But I could not find any real test case uses R_MIPS_PC32
with DSO defined symbol as a target. So for now I prefer to skip this
case to simplify the LLD code.

llvm-svn: 261822

2016-02-25 05:03:52 +00:00

Simon Atanasyan

2287dc3bf8

[ELF][MIPS] Add lazy relocation support for MIPS

The patch adds lazy relocation support for MIPS and R_MIPS_26 relocation
handing.

R_MIPS_26 relocation might require PLT entry creation. In that case it
is fully supported by the patch. But if the relocation target is a local
symbol we need to use a different expression to calculate the relocation
result. This case is not implemented yet because there is no method to
get know the kind of relocation target in the `relocateOne` routine.

Differential Revision: http://reviews.llvm.org/D16982

llvm-svn: 260424

2016-02-10 19:57:19 +00:00

Simon Atanasyan

e1bfc2e793

[ELF][MIPS] Support R_MIPS_COPY relocation

Generate R_MIPS_COPY relocation for 'static' relocations against object
symbols defined in a shared libraries.

llvm-svn: 260083

2016-02-08 10:05:13 +00:00

3 Commits