MCELFObjectTargetWriter::getOSABI(OSType), IsLittle, Is64Bit);
}
+// Little-endian fixup data byte ordering:
+// mips32r2: a | b | x | x
+// microMIPS: x | x | a | b
+
+static bool needsMMLEByteOrder(unsigned Kind) {
+ return Kind >= Mips::fixup_MICROMIPS_26_S1 &&
+ Kind < Mips::LastTargetFixupKind;
+}
+
+// Calculate index for microMIPS specific little endian byte order
+static unsigned calculateMMLEIndex(unsigned i) {
+ assert(i <= 3 && "Index out of range!");
+
+ return (1 - i / 2) * 2 + i % 2;
+}
+
/// ApplyFixup - Apply the \p Value for given \p Fixup into the provided
/// data fragment, at the offset specified by the fixup and following the
/// fixup kind as appropriate.
// Grab current value, if any, from bits.
uint64_t CurVal = 0;
+ bool microMipsLEByteOrder = needsMMLEByteOrder((unsigned) Kind);
+
for (unsigned i = 0; i != NumBytes; ++i) {
- unsigned Idx = IsLittle ? i : (FullSize - 1 - i);
+ unsigned Idx = IsLittle ? (microMipsLEByteOrder ? calculateMMLEIndex(i)
+ : i)
+ : (FullSize - 1 - i);
CurVal |= (uint64_t)((uint8_t)Data[Offset + Idx]) << (i*8);
}
// Write out the fixed up bytes back to the code/data bits.
for (unsigned i = 0; i != NumBytes; ++i) {
- unsigned Idx = IsLittle ? i : (FullSize - 1 - i);
+ unsigned Idx = IsLittle ? (microMipsLEByteOrder ? calculateMMLEIndex(i)
+ : i)
+ : (FullSize - 1 - i);
Data[Offset + Idx] = (uint8_t)((CurVal >> (i*8)) & 0xff);
}
}
--- /dev/null
+# RUN: llvm-mc %s -triple=mipsel-unknown-linux -mcpu=mips32r2 \
+# RUN: -mattr=+micromips 2>&1 -filetype=obj > %t.o
+# RUN: llvm-objdump %t.o -triple mipsel -mattr=+micromips -d | FileCheck %s
+
+# Check that fixup data is writen in the microMIPS specific little endian
+# byte order.
+
+ .text
+ .globl main
+ .align 2
+ .type main,@function
+ .set micromips
+ .set nomips16
+ .ent main
+main:
+ addiu $sp, $sp, -16
+ bnez $9, lab1
+
+# CHECK: 09 b4 04 00 bne $9, $zero, 8
+
+ addu $zero, $zero, $zero
+lab1:
+ jr $ra
+ addiu $sp, $sp, 16
+ .end main