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[mips][mc] Add basic support for R_MIPS_JALR/R_MICROMIPS_JALR

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R_MIPS_JALR/R_MICROMIPS_JALR can now be parsed in .s files and emitted to .o.
They are still not generated with JALR.

Differential revision: https://reviews.llvm.org/D54721

llvm-svn: 347398
This commit is contained in:
Vladimir Stefanovic 2018-11-21 16:38:34 +00:00
parent d431e5c490
commit 8219e24a45
4 changed files with 31 additions and 2 deletions
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12
lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp
View File

@ -339,6 +339,8 @@ Optional<MCFixupKind> MipsAsmBackend::getFixupKind(StringRef Name) const {
(MCFixupKind)Mips::fixup_MICROMIPS_TLS_TPREL_HI16)
.Case("R_MICROMIPS_TLS_TPREL_LO16",
(MCFixupKind)Mips::fixup_MICROMIPS_TLS_TPREL_LO16)
.Case("R_MIPS_JALR", (MCFixupKind)Mips::fixup_Mips_JALR)
.Case("R_MICROMIPS_JALR", (MCFixupKind)Mips::fixup_MICROMIPS_JALR)
.Default(MCAsmBackend::getFixupKind(Name));
}
@ -417,7 +419,9 @@ getFixupKindInfo(MCFixupKind Kind) const {
{ "fixup_MICROMIPS_TLS_TPREL_HI16", 0, 16, 0 },
{ "fixup_MICROMIPS_TLS_TPREL_LO16", 0, 16, 0 },
{ "fixup_Mips_SUB", 0, 64, 0 },
{ "fixup_MICROMIPS_SUB", 0, 64, 0 }
{ "fixup_MICROMIPS_SUB", 0, 64, 0 },
{ "fixup_Mips_JALR", 0, 32, 0 },
{ "fixup_MICROMIPS_JALR", 0, 32, 0 }
};
static_assert(array_lengthof(LittleEndianInfos) == Mips::NumTargetFixupKinds,
"Not all MIPS little endian fixup kinds added!");
@ -495,7 +499,9 @@ getFixupKindInfo(MCFixupKind Kind) const {
{ "fixup_MICROMIPS_TLS_TPREL_HI16", 16, 16, 0 },
{ "fixup_MICROMIPS_TLS_TPREL_LO16", 16, 16, 0 },
{ "fixup_Mips_SUB", 0, 64, 0 },
{ "fixup_MICROMIPS_SUB", 0, 64, 0 }
{ "fixup_MICROMIPS_SUB", 0, 64, 0 },
{ "fixup_Mips_JALR", 0, 32, 0 },
{ "fixup_MICROMIPS_JALR", 0, 32, 0 }
};
static_assert(array_lengthof(BigEndianInfos) == Mips::NumTargetFixupKinds,
"Not all MIPS big endian fixup kinds added!");
@ -553,6 +559,7 @@ bool MipsAsmBackend::shouldForceRelocation(const MCAssembler &Asm,
case Mips::fixup_Mips_TLSLDM:
case Mips::fixup_Mips_TPREL_HI:
case Mips::fixup_Mips_TPREL_LO:
case Mips::fixup_Mips_JALR:
case Mips::fixup_MICROMIPS_CALL16:
case Mips::fixup_MICROMIPS_GOT_DISP:
case Mips::fixup_MICROMIPS_GOT_PAGE:
@ -565,6 +572,7 @@ bool MipsAsmBackend::shouldForceRelocation(const MCAssembler &Asm,
case Mips::fixup_MICROMIPS_TLS_LDM:
case Mips::fixup_MICROMIPS_TLS_TPREL_HI16:
case Mips::fixup_MICROMIPS_TLS_TPREL_LO16:
case Mips::fixup_MICROMIPS_JALR:
return true;
}
}

4
lib/Target/Mips/MCTargetDesc/MipsELFObjectWriter.cpp
View File

@ -401,6 +401,10 @@ unsigned MipsELFObjectWriter::getRelocType(MCContext &Ctx,
return ELF::R_MICROMIPS_HIGHER;
case Mips::fixup_MICROMIPS_HIGHEST:
return ELF::R_MICROMIPS_HIGHEST;
case Mips::fixup_Mips_JALR:
return ELF::R_MIPS_JALR;
case Mips::fixup_MICROMIPS_JALR:
return ELF::R_MICROMIPS_JALR;
}
llvm_unreachable("invalid fixup kind!");

4
lib/Target/Mips/MCTargetDesc/MipsFixupKinds.h
View File

@ -222,6 +222,10 @@ namespace Mips {
fixup_Mips_SUB,
fixup_MICROMIPS_SUB,
// resulting in - R_MIPS_JALR/R_MICROMIPS_JALR
fixup_Mips_JALR,
fixup_MICROMIPS_JALR,
// Marker
LastTargetFixupKind,
NumTargetFixupKinds = LastTargetFixupKind - FirstTargetFixupKind

13
test/MC/Mips/reloc-directive.s
View File

@ -79,6 +79,10 @@ foo:
nop
.reloc 124, R_MICROMIPS_TLS_TPREL_LO16, 4 # ASM: .reloc 124, R_MICROMIPS_TLS_TPREL_LO16, 4
nop
.reloc 128, R_MIPS_JALR, 4 # ASM: .reloc 128, R_MIPS_JALR, 4
nop
.reloc 132, R_MICROMIPS_JALR, 4 # ASM: .reloc 132, R_MICROMIPS_JALR, 4
nop
# OBJ-O32-LABEL: Name: .text
# OBJ-O32: 0000: 00000000 00000000 00000008 00000000
@ -89,6 +93,7 @@ foo:
# OBJ-O32-NEXT: 0050: 00000000 00000004 00000004 00000004
# OBJ-O32-NEXT: 0060: 00000000 00000000 00000000 00000000
# OBJ-O32-NEXT: 0070: 00000000 00000000 00000000 00000000
# OBJ-O32-NEXT: 0080: 00000000 00000000
# OBJ-O32-LABEL: }
# OBJ-O32-LABEL: Relocations [
# OBJ-O32: 0x0 R_MIPS_NONE .text 0x0
@ -121,6 +126,8 @@ foo:
# OBJ-O32-NEXT: 0x74 R_MICROMIPS_TLS_LDM - 0x0
# OBJ-O32-NEXT: 0x78 R_MICROMIPS_TLS_TPREL_HI16 - 0x0
# OBJ-O32-NEXT: 0x7C R_MICROMIPS_TLS_TPREL_LO16 - 0x0
# OBJ-O32-NEXT: 0x80 R_MIPS_JALR - 0x0
# OBJ-O32-NEXT: 0x84 R_MICROMIPS_JALR - 0x0
# OBJ-O32-NEXT: 0x1C R_MIPS_GOT16 - 0x0
# OBJ-O32-NEXT: 0x60 R_MICROMIPS_GOT16 - 0x0
@ -133,6 +140,7 @@ foo:
# OBJ-N32-NEXT: 0050: 00000000 00000000 00000000 00000000
# OBJ-N32-NEXT: 0060: 00000000 00000000 00000000 00000000
# OBJ-N32-NEXT: 0070: 00000000 00000000 00000000 00000000
# OBJ-N32-NEXT: 0080: 00000000 00000000
# OBJ-N32-LABEL: }
# OBJ-N32-LABEL: Relocations [
@ -168,6 +176,8 @@ foo:
# OBJ-N32-NEXT: 0x74 R_MICROMIPS_TLS_LDM - 0x4
# OBJ-N32-NEXT: 0x78 R_MICROMIPS_TLS_TPREL_HI16 - 0x4
# OBJ-N32-NEXT: 0x7C R_MICROMIPS_TLS_TPREL_LO16 - 0x4
# OBJ-N32-NEXT: 0x80 R_MIPS_JALR - 0x4
# OBJ-N32-NEXT: 0x84 R_MICROMIPS_JALR - 0x4
# OBJ-N64-LABEL: Name: .text
# OBJ-N64: 0000: 00000000 00000000 00000000 00000000
@ -178,6 +188,7 @@ foo:
# OBJ-N64-NEXT: 0050: 00000000 00000000 00000000 00000000
# OBJ-N64-NEXT: 0060: 00000000 00000000 00000000 00000000
# OBJ-N64-NEXT: 0070: 00000000 00000000 00000000 00000000
# OBJ-N64-NEXT: 0080: 00000000 00000000
# OBJ-N64-LABEL: }
# OBJ-N64-LABEL: Relocations [
# OBJ-N64: 0x4 R_MIPS_NONE/R_MIPS_NONE/R_MIPS_NONE .text 0x0
@ -212,3 +223,5 @@ foo:
# OBJ-N64-NEXT: 0x74 R_MICROMIPS_TLS_LDM/R_MIPS_NONE/R_MIPS_NONE - 0x4
# OBJ-N64-NEXT: 0x78 R_MICROMIPS_TLS_TPREL_HI16/R_MIPS_NONE/R_MIPS_NONE - 0x4
# OBJ-N64-NEXT: 0x7C R_MICROMIPS_TLS_TPREL_LO16/R_MIPS_NONE/R_MIPS_NONE - 0x4
# OBJ-N64-NEXT: 0x80 R_MIPS_JALR/R_MIPS_NONE/R_MIPS_NONE - 0x4
# OBJ-N64-NEXT: 0x84 R_MICROMIPS_JALR/R_MIPS_NONE/R_MIPS_NONE - 0x4