bcm5719-llvm/llvm/test/MC/ELF, branch meklort-10.0.1Project Ortega BCM5719 LLVMhttps://git.raptorcs.com/git/bcm5719-llvm/atom?h=meklort-10.0.12020-01-14T07:36:06+00:00[MC] Don't resolve relocations referencing STB_LOCAL STT_GNU_IFUNC2020-01-14T07:36:06+00:00Fangrui Songmaskray@google.com2020-01-14T07:35:57+00:00urn:sha1:0136f226c4e46258ea73fcb994f6559cec4a9aa2[MC][ELF] Emit a relocation if target is defined in the same section and is non-local2020-01-12T21:46:24+00:00Fangrui Songmaskray@google.com2020-01-04T05:44:57+00:00urn:sha1:2bfee35cb860859b436de0b780fbd00d68e198a4
For a target symbol defined in the same section, currently we don't emit
a relocation if VariantKind is VK_None (with few exceptions like RISC-V
relaxation), while GNU as emits one. This causes program behavior
differences with and without -ffunction-sections, and can break intended
symbol interposition in a -shared link.
```
.globl foo
foo:
call foo # no relocation. On other targets, may be written as b foo, etc
call bar # a relocation if bar is in another section (e.g. -ffunction-sections)
call foo@plt # a relocation
```
Unify these cases by always emitting a relocation. If we ever want to
optimize `call foo` in -shared links, we should emit a STB_LOCAL alias
and call via the alias.
ARM/thumb2-beq-fixup.s: we now emit a relocation to global_thumb_fn as GNU as does.
X86/Inputs/align-branch-64-2.s: we now emit R_X86_64_PLT32 to foo as GNU does.
ELF/relax.s: rewrite the test as target-in-same-section.s .
We omitted relocations to `global` and now emit R_X86_64_PLT32.
Note, GNU as does not emit a relocation for `jmp global` (maybe its own
bug). Our new behavior is compatible except `jmp global`.
Reviewed By: peter.smith
Differential Revision: https://reviews.llvm.org/D72197
Migrate function attribute "no-frame-pointer-elim" to "frame-pointer"="all" as cleanups after D563512019-12-24T23:57:33+00:00Fangrui Songmaskray@google.com2019-12-24T23:52:21+00:00urn:sha1:502a77f125f43ffde57af34d3fd1b900248a91cd[llvm-readobj] - Fix letters used for dumping section types in GNU style.2019-12-13T08:31:24+00:00Georgii Rymargrimar@accesssoftek.com2019-12-12T14:09:55+00:00urn:sha1:422b078c69ee7ae5c2529992eed4fd8a21aedda4
I've noticed that when we have all regular flags set, we print "WAEXMSILoGTx"
instead of "WAXMSILOGTCE" printed by GNU readelf.
It happens because:
1) We print SHF_EXCLUDE at the wrong place.
2) We do not recognize SHF_COMPRESSED, we print "x" instead of "C".
3) We print "o" instead of "O" for SHF_OS_NONCONFORMING.
This patch fixes differences and adds test cases.
Differential revision: https://reviews.llvm.org/D71418
[MC] Emit unused undefined symbol even if its binding is not set2019-11-08T22:47:48+00:00Fangrui Songmaskray@google.com2019-09-29T15:26:12+00:00urn:sha1:8f089f2099d39021bbfb76a2cd575612382a7cf6
Recommit r373168, which was reverted by r373242. This actually exposed a
boringssl bug which has been fixed for more than one month.
For the following two cases, we currently suppress the symbols. This
patch emits them (compatible with GNU as).
* `test2_a = undef`: if `undef` is otherwise unused.
* `.hidden hidden`: if `hidden` is unused. This is the main point of the
patch, because omitting the symbol would cause a linker semantic
difference.
It causes a behavior change that is not compatible with GNU as:
.weakref foo1, bar1
When neither foo1 nor bar1 is used, we now emit bar1, which is arguably
more consistent.
Another change is that we will emit .TOC. for .TOC.@tocbase . For this
directive, suppressing .TOC. can be seen as a size optimization, but we
choose to drop it for simplicity and consistency.
Added support for "#pragma clang section relro=<name>"2019-10-15T18:31:10+00:00Dmitry Mikulindmitry.mikulin@sony.com2019-10-15T18:31:10+00:00urn:sha1:f14642f2f185f9af290f9fcace4851adbbe16432
Differential Revision: https://reviews.llvm.org/D68806
llvm-svn: 374934
Revert "[MC] Emit unused undefined symbol even if its binding is not set"2019-09-30T18:13:48+00:00Nico Webernicolasweber@gmx.de2019-09-30T18:13:48+00:00urn:sha1:2331cd69cd7812d13e68a84dc9e1189cb14cff55
This reverts r373168. It caused PR43511.
llvm-svn: 373242
[MC] Emit unused undefined symbol even if its binding is not set2019-09-29T15:26:12+00:00Fangrui Songmaskray@google.com2019-09-29T15:26:12+00:00urn:sha1:c5133606627036df0275849ac3d140a86908e310
For the following two cases, we currently suppress the symbols. This
patch emits them (compatible with GNU as).
* `test2_a = undef`: if `undef` is otherwise unused.
* `.hidden hidden`: if `hidden` is unused. This is the main point of the
patch, because omitting the symbol would cause a linker semantic
difference.
It causes a behavior change that is not compatible with GNU as:
.weakref foo1, bar1
When neither foo1 nor bar1 is used, we now emit bar1, which is arguably
more consistent.
Another change is that we will emit .TOC. for .TOC.@tocbase . For this
directive, suppressing .TOC. can be seen as a size optimization, but we
choose to drop it for simplicity and consistency.
llvm-svn: 373168
Remove some unnecessary REQUIRES: shell lines2019-09-10T00:06:52+00:00Reid Klecknerrnk@google.com2019-09-10T00:06:52+00:00urn:sha1:87d47cb7c4792cb4dbb6911b9d11e5bd9f2dc928
This means these tests will run on Windows. Replace one with
UNSUPPORTED: system-windows.
llvm-svn: 371473
[ELF][MC] Set types of aliases of IFunc to STT_GNU_IFUNC2019-09-07T14:58:47+00:00Fangrui Songmaskray@google.com2019-09-07T14:58:47+00:00urn:sha1:72e99e63a2f9b51853cf74eddae37d7eaf106ca5
```
.type foo,@gnu_indirect_function
.set foo,foo_resolver
.set foo2,foo
.set foo3,foo2
```
The types of foo2 and foo3 should be STT_GNU_IFUNC, but we currently
resolve them to the type of foo_resolver. This patch fixes it.
Differential Revision: https://reviews.llvm.org/D67206
Patch by Senran Zhang
llvm-svn: 371312