[lld] r240265 - [Mips] Support R_MICROMIPS_SUB relocation handling
Simon Atanasyan
simon at atanasyan.com
Mon Jun 22 02:26:41 PDT 2015
Author: atanasyan
Date: Mon Jun 22 04:26:41 2015
New Revision: 240265
URL: http://llvm.org/viewvc/llvm-project?rev=240265&view=rev
Log:
[Mips] Support R_MICROMIPS_SUB relocation handling
Added:
lld/trunk/test/elf/Mips/rel-sub-micro.test
Modified:
lld/trunk/lib/ReaderWriter/ELF/Mips/MipsRelocationHandler.cpp
Modified: lld/trunk/lib/ReaderWriter/ELF/Mips/MipsRelocationHandler.cpp
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/lib/ReaderWriter/ELF/Mips/MipsRelocationHandler.cpp?rev=240265&r1=240264&r2=240265&view=diff
==============================================================================
--- lld/trunk/lib/ReaderWriter/ELF/Mips/MipsRelocationHandler.cpp (original)
+++ lld/trunk/lib/ReaderWriter/ELF/Mips/MipsRelocationHandler.cpp Mon Jun 22 04:26:41 2015
@@ -74,6 +74,8 @@ static MipsRelocationParams getRelocatio
case R_MIPS_64:
case R_MIPS_SUB:
return {8, 0xffffffffffffffffull, 0, false, dummyCheck};
+ case R_MICROMIPS_SUB:
+ return {8, 0xffffffffffffffffull, 0, true, dummyCheck};
case R_MIPS_32:
case R_MIPS_GPREL32:
case R_MIPS_REL32:
@@ -350,8 +352,9 @@ static CrossJumpMode getCrossJumpMode(co
}
}
-static uint32_t microShuffle(uint32_t ins) {
- return ((ins & 0xffff) << 16) | ((ins & 0xffff0000) >> 16);
+static uint64_t microShuffle(uint64_t ins) {
+ return (ins & 0xffffffff00000000ull) | ((ins & 0xffff) << 16) |
+ ((ins & 0xffff0000) >> 16);
}
static ErrorOr<int64_t> calculateRelocation(Reference::KindValue kind,
@@ -368,6 +371,7 @@ static ErrorOr<int64_t> calculateRelocat
case R_MIPS_64:
return tgtAddr + addend;
case R_MIPS_SUB:
+ case R_MICROMIPS_SUB:
return tgtAddr - addend;
case R_MIPS_26:
return reloc26loc(relAddr, tgtAddr, addend, 2);
Added: lld/trunk/test/elf/Mips/rel-sub-micro.test
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/test/elf/Mips/rel-sub-micro.test?rev=240265&view=auto
==============================================================================
--- lld/trunk/test/elf/Mips/rel-sub-micro.test (added)
+++ lld/trunk/test/elf/Mips/rel-sub-micro.test Mon Jun 22 04:26:41 2015
@@ -0,0 +1,62 @@
+# Check handling of R_MICROMIPS_SUB relocation.
+
+# RUN: yaml2obj -format=elf %s > %t.o
+# RUN: lld -flavor gnu -target mips64el -o %t.exe %t.o
+# RUN: llvm-objdump -s -t %t.exe | FileCheck %s
+
+# CHECK: Contents of section .data:
+# CHECK-NEXT: 120002000 0020cc01 01000000 0020d001 0100ffff
+# ^^ __start - 4 = 0x1200001cc
+# ^^ __start - 0x1000000000000
+# = 0xffff0001200001d0
+# CHECK: SYMBOL TABLE:
+# CHECK: 00000001200001d0 g .rodata 00000008 __start
+
+FileHeader:
+ Class: ELFCLASS64
+ Data: ELFDATA2LSB
+ Type: ET_REL
+ Machine: EM_MIPS
+ Flags: [EF_MIPS_PIC, EF_MIPS_CPIC, EF_MIPS_ARCH_64, EF_MIPS_MICROMIPS]
+
+Sections:
+- Name: .text
+ Type: SHT_PROGBITS
+ Size: 8
+ AddressAlign: 16
+ Flags: [SHF_ALLOC]
+
+- Name: .data
+ Type: SHT_PROGBITS
+ Size: 16
+ AddressAlign: 16
+ Flags: [SHF_ALLOC, SHF_WRITE]
+
+- Name: .rela.data
+ Type: SHT_RELA
+ Info: .data
+ AddressAlign: 4
+ Relocations:
+ - Offset: 0
+ Symbol: __start
+ Type: R_MICROMIPS_SUB
+ Addend: 4
+ - Offset: 8
+ Symbol: __start
+ Type: R_MICROMIPS_SUB
+ Addend: 0x1000000000000
+
+Symbols:
+ Global:
+ - Name: __start
+ Section: .text
+ Value: 0
+ Size: 8
+ - Name: D1
+ Section: .data
+ Value: 0
+ Size: 8
+ - Name: D2
+ Section: .data
+ Value: 8
+ Size: 8
More information about the llvm-commits
mailing list