llvm-project

Commit Graph

Author	SHA1	Message	Date
Peter Smith	113a59e7db	[ELF] Define _GLOBAL_OFFSET_TABLE_ symbol relative to .got On many architectures gcc and clang will recognize _GLOBAL_OFFSET_TABLE_ - . and produce a relocation that can be processed without needing to know the value of _GLOBAL_OFFSET_TABLE_. This is not always the case; for example ARM gcc produces R_ARM_BASE_PREL but clang produces the more general R_ARM_REL32 to _GLOBAL_OFFSET_TABLE_. To evaluate this relocation correctly _GLOBAL_OFFSET_TABLE_ must be defined to be the either the base of the GOT or end of the GOT dependent on architecture.. If/when llvm-mc is changed to recognize _GLOBAL_OFFSET_TABLE_ - . this change will not be necessary for new objects. However there may still be old objects and versions of clang. Differential Revision: https://reviews.llvm.org/D34355 llvm-svn: 306282	2017-06-26 10:22:17 +00:00
Rui Ueyama	e145bc22fd	Do not use make<> to allocate TargetInfo. NFC. llvm-svn: 305577	2017-06-16 20:15:03 +00:00
Rui Ueyama	21c0a9ceeb	Split Target.cpp into small files. Target.cpp contains code for all the targets that LLD supports. It was simple and easy, but as the number of supported targets increased, it got messy. This patch splits the file into per-target files under ELF/arch directory. Differential Revision: https://reviews.llvm.org/D34222 llvm-svn: 305565	2017-06-16 17:32:43 +00:00

Author

SHA1

Message

Date

Peter Smith

113a59e7db

[ELF] Define _GLOBAL_OFFSET_TABLE_ symbol relative to .got

On many architectures gcc and clang will recognize _GLOBAL_OFFSET_TABLE_ - .
and produce a relocation that can be processed without needing to know the
value of _GLOBAL_OFFSET_TABLE_. This is not always the case; for example ARM
gcc produces R_ARM_BASE_PREL but clang produces the more general
R_ARM_REL32 to _GLOBAL_OFFSET_TABLE_. To evaluate this relocation
correctly _GLOBAL_OFFSET_TABLE_ must be defined to be the either the base of
the GOT or end of the GOT dependent on architecture..

If/when llvm-mc is changed to recognize _GLOBAL_OFFSET_TABLE_ - . this
change will not be necessary for new objects. However there may still be
old objects and versions of clang.

Differential Revision: https://reviews.llvm.org/D34355

llvm-svn: 306282

2017-06-26 10:22:17 +00:00

Rui Ueyama

e145bc22fd

Do not use make<> to allocate TargetInfo. NFC.

llvm-svn: 305577

2017-06-16 20:15:03 +00:00

Rui Ueyama

21c0a9ceeb

Split Target.cpp into small files.

Target.cpp contains code for all the targets that LLD supports. It was
simple and easy, but as the number of supported targets increased,
it got messy.

This patch splits the file into per-target files under ELF/arch directory.

Differential Revision: https://reviews.llvm.org/D34222

llvm-svn: 305565

2017-06-16 17:32:43 +00:00

3 Commits