Print the bad value and required alignment for unaligned relocations

[ruiu]

LGTM

ELF/Target.h

if (!llvm::isInt<N>(V) && !llvm::isUInt<N>(V))
     error(getErrorLocation(Loc) + "relocation " + lld::toString(Type) +
           " out of range");
 }
 
 template <unsigned N>
 static void checkAlignment(uint8_t *Loc, uint64_t V, RelType Type) {
   if ((V & (N - 1)) != 0)
     error(getErrorLocation(Loc) + "improper alignment for relocation " +
-          lld::toString(Type));
+          lld::toString(Type) + ": 0x" + llvm::utohexstr(V) +
+          " is not aligned to " + Twine(N) + " bytes");
 }
 } // namespace elf
 } // namespace lld
 
 #endif

test/ELF/aarch64-lo12-alignment.s

  .space 1
 foo2:
  .space 2
 foo4:
  .space 4
 foo8:
  .space 8
 
-// CHECK: improper alignment for relocation R_AARCH64_LDST16_ABS_LO12_NC
-// CHECK-NEXT: improper alignment for relocation R_AARCH64_LDST32_ABS_LO12_NC
-// CHECK-NEXT: improper alignment for relocation R_AARCH64_LDST64_ABS_LO12_NC
-// CHECK-NEXT: improper alignment for relocation R_AARCH64_LDST128_ABS_LO12_NC
+// CHECK: improper alignment for relocation R_AARCH64_LDST16_ABS_LO12_NC: 0x30001 is not aligned to 2 bytes
+// CHECK-NEXT: improper alignment for relocation R_AARCH64_LDST32_ABS_LO12_NC: 0x30002 is not aligned to 4 bytes
+// CHECK-NEXT: improper alignment for relocation R_AARCH64_LDST64_ABS_LO12_NC: 0x30004 is not aligned to 8 bytes
+// CHECK-NEXT: improper alignment for relocation R_AARCH64_LDST128_ABS_LO12_NC: 0x30008 is not aligned to 16 bytes

test/ELF/aarch64-load-alignment.s

 # REQUIRES: aarch64
 
 # RUN: llvm-mc -filetype=obj -triple=aarch64-linux-none %s -o %t.o
 # RUN: not ld.lld -shared %t.o -o %t 2>&1 | FileCheck %s
 
-# CHECK: improper alignment for relocation R_AARCH64_LD_PREL_LO19
+# CHECK: improper alignment for relocation R_AARCH64_LD_PREL_LO19: 0x10005 is not aligned to 4 bytes
 
   ldr x8, patatino
   .data
   .zero 5
 patatino:

test/ELF/mips-align-err.s

 # REQUIRES: mips
 # RUN: llvm-mc -filetype=obj -triple=mips-unknown-linux %s -o %t.o \
 # RUN:         -mcpu=mips32r6
 # RUN: llvm-mc -filetype=obj -triple=mips-unknown-linux \
 # RUN:         -mcpu=mips32r6 %S/Inputs/mips-align-err.s -o %t2.o
 # RUN: not ld.lld %t.o %t2.o -o %t.exe 2>&1 | FileCheck %s
-# CHECK: {{.*}}:(.text+0x1): improper alignment for relocation R_MIPS_PC16
+# CHECK: {{.*}}:(.text+0x1): improper alignment for relocation R_MIPS_PC16: 0xB is not aligned to 4 bytes
 
         .globl  __start
 __start:
 .zero 1
         beqc      $5, $6, _foo            # R_MIPS_PC16