Commit Graph

7 Commits

Author SHA1 Message Date
Ed Maste 8fd0196c6f lld: Default image base address to 0x200000 on x86-64
Align to the large page size (known as a superpage or huge page).
FreeBSD automatically promotes large, superpage-aligned allocations.

Differential Revision:	https://reviews.llvm.org/D27042

llvm-svn: 287782
2016-11-23 17:44:02 +00:00
George Rimar 7beff42f8f [ELF] - Do not create reserved symbols in case of relocatable output.
This patch stops creating symbols like __ehdr_start, 
_end/_etext_edata,__tls_get_addr when using -r.

This fixes PR30984.

Differential revision: https://reviews.llvm.org/D26600

llvm-svn: 286941
2016-11-15 08:19:02 +00:00
George Rimar 28ac19c9ee [ELF] - Linkerscript: do not define _edata,_end,_etext if SECTIONS is used.
I faced that when tried to link FreeBSD kernel. 
It was "duplicate symbol: _edata in (internal) and (internal)" error.
_data was a shared symbol that came from hack.so. At first it was replaced with DefinedRegular by the code
disabled in this patch and later when script tried to define the same symbol - the error was shown.

In the same situation (as given in testcase) ld defines them as UND. gold defines as ABS with zero value. 
Patch just disables any operations of creating these symbols if script do layout.

Differential revision: https://reviews.llvm.org/D23206

llvm-svn: 277986
2016-08-08 08:42:48 +00:00
George Rimar 652852c5c0 Recommitted 266457 with fix:
* Do script driven layout only if SECTIONS section exist.

Initial commit message:

[ELF] - Implemented basic location counter support.

This patch implements location counter support. 
It also separates assign addresses for sections to assignAddressesScript() if it scipt exists.

Main testcase is test/ELF/linkerscript-locationcounter.s, It contains some work with location counter. It is basic now.
Implemented location counter assignment and '+' operations.

Patch by myself with LOTS of comments and design suggestions from Rui Ueyama.

Differential revision: http://reviews.llvm.org/D18499

llvm-svn: 266526
2016-04-16 10:10:32 +00:00
Rui Ueyama faac567e68 Revert r266457: "[ELF] - Implemented basic location counter support."
This reverts commit r266457 as it breaks "hello world" both on
Linux and FreeBSD.

llvm-svn: 266485
2016-04-15 22:39:27 +00:00
George Rimar ea25877d4a [ELF] - Implemented basic location counter support.
This patch implements location counter support. 
It also separates assign addresses for sections to assignAddressesScript() if it scipt exists.

Main testcase is test/ELF/linkerscript-locationcounter.s, It contains some work with location counter. It is basic now.
Implemented location counter assignment and '+' operations.

Patch by myself with LOTS of comments and design suggestions from Rui Ueyama.

Differential revision: http://reviews.llvm.org/D18499

llvm-svn: 266457
2016-04-15 17:44:19 +00:00
Igor Kudrin b044af50f2 [ELF] Define symbols "_end" and "end" if referenced.
These symbols are expected to point to the end of the data segment.

Implements http://llvm.org/pr25528.

Differential Revision: http://reviews.llvm.org/D14833

llvm-svn: 253637
2015-11-20 02:32:35 +00:00