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[MC][PowerPC] Support .reloc *, BFD_RELOC_{NONE,16,32,64}, * 

BFD_RELOC_NONE is useful for ld --gc-sections: it provides a generic way indicating a dependency between two sections.
This commit is contained in:
Fangrui Song 2021-03-05 21:31:45 -08:00
parent aceea45d87
commit 3110187f1f
3 changed files with 30 additions and 0 deletions
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7
llvm/lib/Target/PowerPC/MCTargetDesc/PPCAsmBackend.cpp
View File

@ -247,12 +247,19 @@ Optional<MCFixupKind> ELFPPCAsmBackend::getFixupKind(StringRef Name) const {
#define ELF_RELOC(X, Y) .Case(#X, Y)
#include "llvm/BinaryFormat/ELFRelocs/PowerPC64.def"
#undef ELF_RELOC
.Case("BFD_RELOC_NONE", ELF::R_PPC64_NONE)
.Case("BFD_RELOC_16", ELF::R_PPC64_ADDR16)
.Case("BFD_RELOC_32", ELF::R_PPC64_ADDR32)
.Case("BFD_RELOC_64", ELF::R_PPC64_ADDR64)
.Default(-1u);
} else {
Type = llvm::StringSwitch<unsigned>(Name)
#define ELF_RELOC(X, Y) .Case(#X, Y)
#include "llvm/BinaryFormat/ELFRelocs/PowerPC.def"
#undef ELF_RELOC
.Case("BFD_RELOC_NONE", ELF::R_PPC_NONE)
.Case("BFD_RELOC_16", ELF::R_PPC_ADDR16)
.Case("BFD_RELOC_32", ELF::R_PPC_ADDR32)
.Default(-1u);
}
if (Type != -1u)

10
llvm/test/MC/PowerPC/ppc32-reloc-directive.s
View File

@ -8,6 +8,9 @@
# PRINT: .reloc 0, R_PPC_ADDR32, .data+2
# PRINT: .reloc 0, R_PPC_REL16_HI, foo+3
# PRINT: .reloc 0, R_PPC_REL16_HA, 5
# PRINT: .reloc 0, BFD_RELOC_NONE, 9
# PRINT: .reloc 0, BFD_RELOC_16, 9
# PRINT: .reloc 0, BFD_RELOC_32, 9
# CHECK: 0x8 R_PPC_NONE .data 0x0
# CHECK-NEXT: 0x4 R_PPC_NONE foo 0x4
@ -15,6 +18,9 @@
# CHECK-NEXT: 0x0 R_PPC_ADDR32 .data 0x2
# CHECK-NEXT: 0x0 R_PPC_REL16_HI foo 0x3
# CHECK-NEXT: 0x0 R_PPC_REL16_HA - 0x5
# CHECK-NEXT: 0x0 R_PPC_NONE - 0x9
# CHECK-NEXT: 0x0 R_PPC_ADDR16 - 0x9
# CHECK-NEXT: 0x0 R_PPC_ADDR32 - 0x9
.text
blr
@ -27,6 +33,10 @@
.reloc 0, R_PPC_REL16_HI, foo+3
.reloc 0, R_PPC_REL16_HA, 5
.reloc 0, BFD_RELOC_NONE, 9
.reloc 0, BFD_RELOC_16, 9
.reloc 0, BFD_RELOC_32, 9
.data
.globl foo
foo:

13
llvm/test/MC/PowerPC/ppc64-reloc-directive.s
View File

@ -10,6 +10,10 @@
# PRINT: .reloc 0, R_PPC64_ADDR32, .data+2
# PRINT: .reloc 0, R_PPC64_REL16_HI, foo+3
# PRINT: .reloc 0, R_PPC64_REL16_HA, 5
# PRINT: .reloc 0, BFD_RELOC_NONE, 9
# PRINT: .reloc 0, BFD_RELOC_16, 9
# PRINT: .reloc 0, BFD_RELOC_32, 9
# PRINT: .reloc 0, BFD_RELOC_64, 9
# CHECK: 0x8 R_PPC64_NONE .data 0x0
# CHECK-NEXT: 0x4 R_PPC64_NONE foo 0x4
@ -17,6 +21,10 @@
# CHECK-NEXT: 0x0 R_PPC64_ADDR32 .data 0x2
# CHECK-NEXT: 0x0 R_PPC64_REL16_HI foo 0x3
# CHECK-NEXT: 0x0 R_PPC64_REL16_HA - 0x5
# CHECK-NEXT: 0x0 R_PPC64_NONE - 0x9
# CHECK-NEXT: 0x0 R_PPC64_ADDR16 - 0x9
# CHECK-NEXT: 0x0 R_PPC64_ADDR32 - 0x9
# CHECK-NEXT: 0x0 R_PPC64_ADDR64 - 0x9
.text
blr
@ -29,6 +37,11 @@
.reloc 0, R_PPC64_REL16_HI, foo+3
.reloc 0, R_PPC64_REL16_HA, 5
.reloc 0, BFD_RELOC_NONE, 9
.reloc 0, BFD_RELOC_16, 9
.reloc 0, BFD_RELOC_32, 9
.reloc 0, BFD_RELOC_64, 9
.data
.globl foo
foo: