COFF: ARM: Implement MOV32T relocation.
llvm-svn: 243201
diff --git a/lld/COFF/Chunks.cpp b/lld/COFF/Chunks.cpp
index b7d0dd1..55a3646 100644
--- a/lld/COFF/Chunks.cpp
+++ b/lld/COFF/Chunks.cpp
@@ -48,6 +48,7 @@
static void add16(uint8_t *P, int16_t V) { write16le(P, read16le(P) + V); }
static void add32(uint8_t *P, int32_t V) { write32le(P, read32le(P) + V); }
static void add64(uint8_t *P, int64_t V) { write64le(P, read64le(P) + V); }
+static void or16(uint8_t *P, uint16_t V) { write16le(P, read16le(P) | V); }
void SectionChunk::applyRelX64(uint8_t *Off, uint16_t Type, uint64_t S,
uint64_t P) {
@@ -82,6 +83,26 @@
}
}
+static void applyMOV32T(uint8_t *Off, uint32_t V) {
+ uint16_t X = V;
+ or16(Off, ((X & 0x800) >> 1) | ((X >> 12) & 0xf));
+ or16(Off + 2, ((X & 0x700) << 4) | (X & 0xff));
+ X = V >> 16;
+ or16(Off + 4, ((X & 0x800) >> 1) | ((X >> 12) & 0xf));
+ or16(Off + 6, ((X & 0x700) << 4) | (X & 0xff));
+}
+
+void SectionChunk::applyRelARM(uint8_t *Off, uint16_t Type, uint64_t S,
+ uint64_t P) {
+ switch (Type) {
+ case IMAGE_REL_ARM_ADDR32: add32(Off, S + Config->ImageBase); break;
+ case IMAGE_REL_ARM_ADDR32NB: add32(Off, S); break;
+ case IMAGE_REL_ARM_MOV32T: applyMOV32T(Off, S + Config->ImageBase); break;
+ default:
+ llvm::report_fatal_error("Unsupported relocation type");
+ }
+}
+
void SectionChunk::writeTo(uint8_t *Buf) {
if (!hasData())
return;
@@ -102,6 +123,9 @@
case IMAGE_FILE_MACHINE_I386:
applyRelX86(Off, Rel.Type, S, P);
break;
+ case IMAGE_FILE_MACHINE_ARMNT:
+ applyRelARM(Off, Rel.Type, S, P);
+ break;
default:
llvm_unreachable("unknown machine type");
}
@@ -125,6 +149,12 @@
if (Rel.Type == IMAGE_REL_I386_DIR32)
return IMAGE_REL_BASED_HIGHLOW;
return IMAGE_REL_BASED_ABSOLUTE;
+ case IMAGE_FILE_MACHINE_ARMNT:
+ if (Rel.Type == IMAGE_REL_ARM_ADDR32)
+ return IMAGE_REL_BASED_HIGHLOW;
+ if (Rel.Type == IMAGE_REL_ARM_MOV32T)
+ return IMAGE_REL_BASED_ARM_MOV32T;
+ return IMAGE_REL_BASED_ABSOLUTE;
default:
llvm_unreachable("unknown machine type");
}