Commit Graph

18 Commits

Author SHA1 Message Date
George Rimar 0810f16fb9 [LLD][ELF] - Linkerscript: add a support for expressions for section's filling
Imagine the script:

.section: {
...
} = FILL_EXPR
LLD assumes that FILL_EXPR is a number, and does not allow
it to be an expression. Though that is allowed by specification:
https://sourceware.org/binutils/docs-2.32/ld/Output-Section-Fill.html

This patch adds a support for cases when FILL_EXPR is simple math expression.

Fixes https://bugs.llvm.org/show_bug.cgi?id=42482.

Differential revision: https://reviews.llvm.org/D64130

llvm-svn: 365143
2019-07-04 14:17:31 +00:00
Chandler Carruth 2946cd7010 Update the file headers across all of the LLVM projects in the monorepo
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636
2019-01-19 08:50:56 +00:00
George Rimar a46d08ebe6 [LLD][ELD] - Do not reject INFO output section type when used with a start address.
This is https://bugs.llvm.org/show_bug.cgi?id=38625

LLD accept this: 

".stack (INFO) : {", 

but not this:

".stack address_expression (INFO) :"

The patch fixes it.

Differential revision: https://reviews.llvm.org/D51027

llvm-svn: 340804
2018-08-28 08:39:21 +00:00
George Rimar e5cd32b702 [ELF] - Remove dead code #2.
'Pos' is never can be 0 here.

llvm-svn: 336436
2018-07-06 13:30:50 +00:00
George Rimar 92bd49e874 [ELF] - Remove dead code. NFC.
'Pos' can never be 0.

llvm-svn: 336435
2018-07-06 13:23:49 +00:00
George Rimar b5d6e76bb7 [ELF] - Add a comment. NFC.
Minor follow up for r336197
"[ELF] - Add support for '||' and '&&' in linker scripts."

llvm-svn: 336199
2018-07-03 14:16:19 +00:00
George Rimar a50054829d [ELF] - Add support for '||' and '&&' in linker scripts.
This is https://bugs.llvm.org//show_bug.cgi?id=37976,
we had no support, but seems someone faced it.

llvm-svn: 336197
2018-07-03 14:02:52 +00:00
Rui Ueyama c67d6b2da0 Simplify script lexer.
Differential Revision: https://reviews.llvm.org/D41577

llvm-svn: 321453
2017-12-26 10:13:10 +00:00
Bob Haarman b8a59c8aa5 [lld] unified COFF and ELF error handling on new Common/ErrorHandler
Summary:
The COFF linker and the ELF linker have long had similar but separate
Error.h and Error.cpp files to implement error handling. This change
introduces new error handling code in Common/ErrorHandler.h, changes the
COFF and ELF linkers to use it, and removes the old, separate
implementations.

Reviewers: ruiu

Reviewed By: ruiu

Subscribers: smeenai, jyknight, emaste, sdardis, nemanjai, nhaehnle, mgorny, javed.absar, kbarton, fedor.sergeev, llvm-commits

Differential Revision: https://reviews.llvm.org/D39259

llvm-svn: 316624
2017-10-25 22:28:38 +00:00
George Rimar 81eca18df3 [ELF] - Linkerscript: Add `~` as separate math token.
Previously we did not support following:
foo = ~0xFF;
and had to add space before numeric value:
foo = ~ 0xFF

That was constistent with ld.bfd < 2.30, which shows:
script.txt:3: undefined symbol `~2' referenced in expression,
but inconsistent with gold.

It was fixed for ld.bfd 2.30 as well:
https://sourceware.org/bugzilla/show_bug.cgi?id=22267

Differential revision: https://reviews.llvm.org/D36508

llvm-svn: 315569
2017-10-12 08:40:12 +00:00
George Rimar 970e783bdd [ELF] - Fix out of sync comment. NFC.
llvm-svn: 315442
2017-10-11 08:18:53 +00:00
George Rimar de2d1066ae [ELF] - Do not report multiple errors for single one in ScriptLexer::setError.
Previously up to 3 errors were reported at once,
with patch we always will report only one,
just like in other linker code.

Differential revision: https://reviews.llvm.org/D37015

llvm-svn: 311537
2017-08-23 08:48:39 +00:00
Hafiz Abid Qadeer 6f1d954ef4 [ELF, LinkerScript] Support ! operator in linker script.
Summary: This small patch adds the support for ! operator in linker scripts. 

Reviewers: ruiu, rafael

Reviewed By: ruiu

Subscribers: meadori, grimar, emaste, llvm-commits

Differential Revision: https://reviews.llvm.org/D36451

llvm-svn: 310607
2017-08-10 15:25:47 +00:00
George Rimar ce6080819c [ELF] - Remove ScriptLexer::Error field and check ErrorCount instead.
D35945 introduces change when there is useless to check Error flag
in few places, but ErrorCount must be checked instead.

But then we probably can just check ErrorCount always. That should simplify
things. Patch do that.

Differential revision: https://reviews.llvm.org/D36266

llvm-svn: 310046
2017-08-04 10:34:14 +00:00
Rui Ueyama f5fce48679 Handle ":" as a regular token character in linker scripts.
This is an alternative to https://reviews.llvm.org/D30500 to simplify the
version definition parser and allow ":" in symbol names.

Differential Revision: https://reviews.llvm.org/D30722

llvm-svn: 297402
2017-03-09 19:23:00 +00:00
Rui Ueyama 731a66ae98 Apply different tokenization rules to linker script expressions.
The linker script lexer is context-sensitive. In the regular context,
arithmetic operator characters are regular characters, but in the
expression context, they are independent tokens. This afects how the
lexer tokenizes "3*4", for example. (This kind of expression is real;
the Linux kernel uses it.)

This patch defines function `maybeSplitExpr`. This function splits the
current token into multiple expression tokens if the lexer is in the
expression context.

Differential Revision: https://reviews.llvm.org/D29963

llvm-svn: 295225
2017-02-15 19:58:17 +00:00
Rui Ueyama 4c82b4f6fa Add file comments for ScriptParser.cpp.
llvm-svn: 295023
2017-02-14 04:47:24 +00:00
Rui Ueyama 794366a237 Rename ScriptParser.{cpp,h} -> ScriptLexer.{cpp,h}.
These files contain a lexer, so the new names are better.
The parser is in LinkerScript.{cpp,h}.

llvm-svn: 295022
2017-02-14 04:47:05 +00:00