Add TPREL relocation support to Hexagon

Differential Revision: https://reviews.llvm.org/D71069

lld/ELF/Arch/Hexagon.cpp

@@ -125,6 +125,13 @@ RelExpr Hexagon::getRelExpr(RelType type, const Symbol &s,
   case R_HEX_GOT_16_X:
   case R_HEX_GOT_32_6_X:
     return R_GOTPLT;
+  case R_HEX_TPREL_11_X:
+  case R_HEX_TPREL_16:
+  case R_HEX_TPREL_16_X:
+  case R_HEX_TPREL_32_6_X:
+  case R_HEX_TPREL_HI16:
+  case R_HEX_TPREL_LO16:
+    return R_TLS;
   default:
     error(getErrorLocation(loc) + "unknown relocation (" + Twine(type) +
           ") against symbol " + toString(s));
@@ -222,6 +229,7 @@ void Hexagon::relocateOne(uint8_t *loc, RelType type, uint64_t val) const {
   case R_HEX_11_X:
   case R_HEX_GOT_11_X:
   case R_HEX_GOTREL_11_X:
+  case R_HEX_TPREL_11_X:
     or32le(loc, applyMask(findMaskR11(read32le(loc)), val & 0x3f));
     break;
   case R_HEX_12_X:
@@ -230,8 +238,12 @@ void Hexagon::relocateOne(uint8_t *loc, RelType type, uint64_t val) const {
   case R_HEX_16_X: // These relocs only have 6 effective bits.
   case R_HEX_GOT_16_X:
   case R_HEX_GOTREL_16_X:
+  case R_HEX_TPREL_16_X:
     or32le(loc, applyMask(findMaskR16(read32le(loc)), val & 0x3f));
     break;
+  case R_HEX_TPREL_16:
+    or32le(loc, applyMask(findMaskR16(read32le(loc)), val & 0xffff));
+    break;
   case R_HEX_32:
   case R_HEX_32_PCREL:
     or32le(loc, val);
@@ -239,6 +251,7 @@ void Hexagon::relocateOne(uint8_t *loc, RelType type, uint64_t val) const {
   case R_HEX_32_6_X:
   case R_HEX_GOT_32_6_X:
   case R_HEX_GOTREL_32_6_X:
+  case R_HEX_TPREL_32_6_X:
     or32le(loc, applyMask(0x0fff3fff, val >> 6));
     break;
   case R_HEX_B9_PCREL:
@@ -272,10 +285,12 @@ void Hexagon::relocateOne(uint8_t *loc, RelType type, uint64_t val) const {
     break;
   case R_HEX_GOTREL_HI16:
   case R_HEX_HI16:
+  case R_HEX_TPREL_HI16:
     or32le(loc, applyMask(0x00c03fff, val >> 16));
     break;
   case R_HEX_GOTREL_LO16:
   case R_HEX_LO16:
+  case R_HEX_TPREL_LO16:
     or32le(loc, applyMask(0x00c03fff, val));
     break;
   default:

lld/ELF/InputSection.cpp

@@ -636,6 +636,7 @@ static int64_t getTlsTpOffset(const Symbol &s) {
     return s.getVA(0) + (tls->p_vaddr & (tls->p_align - 1));
 
     // Variant 2.
+  case EM_HEXAGON:
   case EM_386:
   case EM_X86_64:
     return s.getVA(0) - tls->p_memsz -

lld/test/ELF/hexagon-tls-le.s

@@ -0,0 +1,56 @@
+# REQUIRES: hexagon
+# RUN: llvm-mc -filetype=obj -triple=hexagon-unknown-elf %s -o %t.o
+# RUN: ld.lld %t.o -o %t
+# RUN: llvm-objdump -d --print-imm-hex %t | FileCheck %s
+
+	.globl	_start
+	.type	_start, @function
+_start:
+r0 = ugp
+
+# R_HEX_TPREL_32_6_X and R_HEX_TPREL_16_X
+# CHECK:      { immext(#0xffffffc0)
+# CHECK-NEXT:   r1 = add(r0,##-0x10) }
+                r1 = add(r0,##a@TPREL)
+
+# R_HEX_TPREL_32_6_X and R_HEX_TPREL_11_X
+# CHECK:      { immext(#0xffffffc0)
+# CHECK-NEXT:   r2 = memw(r0+##-0x10) }
+                r2 = memw(r0+##a@TPREL)
+
+# R_HEX_TPREL_HI16
+# CHECK: {      r3.h = #0xffff }
+                r3.h = #a@TPREL
+
+# R_HEX_TPREL_LO16
+# CHECK: {      r3.l = #0xfff0 }
+                r3.l = #a@TPREL
+
+# R_HEX_TPREL_16
+# CHECK: {      r4 = #-0x10 }
+                r4 = #a@TPREL
+
+        .section        .tdata,"awT",@progbits
+        .globl  a
+        .p2align        2
+a:
+        .word   1
+        .size   a, 4
+
+        .globl  b
+        .p2align        2
+b:
+        .word   2
+        .size   b, 4
+
+        .globl  c
+        .p2align        2
+c:
+        .word   3
+        .size   c, 4
+
+        .globl  d
+        .p2align        2
+d:
+        .word   4
+        .size   d, 4