Command line options --arm-target1-rel and --arm-target1-abs have been renamed to be compatible with GNU linkers.
Two tests have been updated:
test/elf/options/target-specific-args.test
test/elf/ARM/rel-arm-target1.test
Differential Revision: http://reviews.llvm.org/D9037
llvm-svn: 235499
According to the code model (ARM, Thumb, Thumb2) this patch updates the b/bl/blx 0 instructions with NOP.
test/elf/ARM/weak-branch.test has been added with tests for all available NOP (A1, T1, T2 encodings).
Differential Revision: http://reviews.llvm.org/D8807
llvm-svn: 235498
The TargetLayout class puts two sections into the same segment if they
have equal segment types and the same section flags (SHF_xxx). To be
able to merge some sort of sections into the same segment we drop some
flags before comparison. For example to merge string sections into Data
segment we drop SHF_STRINGS and SHF_MERGE flags.
The patch allows TargetLayout descendants to drop some target specific
section flags. MIPS target needs that to merge .MIPS.options section
which has SHF_MIPS_NOSTRIP flag into the LOAD segment.
http://reviews.llvm.org/D9160
llvm-svn: 235487
There's (almost) never need to keep .L symbols around for production
builds. In fact, the FreeBSD kernel explicitly specify -X beacuse the
size impact (and the subsequent performance impact) might be significant,
because we keep symbols in memory.
I was tempted to make this the default, but I haven't (yet).
PR: 23232
llvm-svn: 235357
Previously, ELFReader takes three template arguments: EFLT,
LinkingContextT and FileT. FileT is itself templated.
So it was a bit complicated. Maybe too much.
Most architectures don't actually need to be parameterized for ELFT.
For example, x86 is always ELF32LE and x86-64 is ELF64LE.
However, because ELFReader requires a ELFT argument, we needed
to parameterize a class even if not needed.
This patch removes the parameter from the class. So now we can
de-templatize such classes (I didn't do that in this patch, though).
This patch also removes ContextT parameter since it didn't have to be
passed as a template argument.
llvm-svn: 234853
This MIPS specific option controls R_MIPS_EH relocation handling.
If -pcrel-eh-reloc is specified R_MIPS_EH relocation should be handled
like R_MIPS_PC32 relocation.
llvm-svn: 234635
The patch supports just the R_MIPS_EH relocation handling and does not
implement full specification of compact exception tables for MIPS ABIs.
llvm-svn: 234634
This includes implementation of PLT0 entry.
For testing, libfn.so binary is added since
there's no way to link shared objects with lld yet.
llvm-svn: 234588
Make PLT entry atoms represent mapping symbols in the Release mode,
while in the Debug mode they are still function-like symbols
with regular names.
It's legal that mapping symbols denote unnamed parts of code,
and PLT entries are not required to have function-like names.
Differential Revision: http://reviews.llvm.org/D8819
llvm-svn: 234301
This matches other linkers behaviour. Moreover, there's really
no need to keep them around.
Reported by: Rafael Avila de Espindola
PR: 22890
llvm-svn: 234130
In case of MIPS N64 ABI linker should merge registers usage masks stored
in the input .MIPS.options sections and save result into the output
.MIPS.options section.
llvm-svn: 234115
In case of MIPS O32 ABI linker should merge registers usage masks stored
in the input .reginfo sections and save result into the output .reginfo
section.
The ABI states that the .reginfo section should be put into the separate
segment. This requirement is not implemented in this patch.
llvm-svn: 234103
This patch provides implementation of R_ARM_TARGET1 relocation with
configuration of its behaviour from a command line. This patch provides
two command line options for GnuLd driver: --arm-target1-rel and
--arm-target1-abs (similar to ld option names with extra prefix 'arm-').
So user may choose which behaviour of R_ARM_TARGET1 is preferred for his
implementation of libc.
Differential Revision: http://reviews.llvm.org/D8707
llvm-svn: 234009
The function call that goes through PLT table may be performed
from both ARM and Thumb code.
This situation requires adding a veneer to original PLT code
(which is always ARM) to effect Thumb-to-ARM transition.
Differential Revision: http://reviews.llvm.org/D8701
llvm-svn: 233900
Leny Kholodov