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Implement IMAGE_REL_AMD64_SECREL for RuntimeDyldCOFFX86_64

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lldb on Windows uses the ExecutionEngine for expression evaluation
and hits the llvm_unreachable due to this relocation. Thus, implement
the relocation and add a test to verify it's function.

llvm-svn: 348904
This commit is contained in:
Nathan Lanza 2018-12-12 00:04:06 +00:00
parent 321ce59ba4
commit 3cfcc8fb8b
2 changed files with 21 additions and 0 deletions
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7
lib/ExecutionEngine/RuntimeDyld/Targets/RuntimeDyldCOFFX86_64.h
View File

@ -128,6 +128,13 @@ public:
break;
}
case COFF::IMAGE_REL_AMD64_SECREL: {
assert(static_cast<int64_t>(RE.Addend) <= INT32_MAX && "Relocation overflow");
assert(static_cast<int64_t>(RE.Addend) >= INT32_MIN && "Relocation underflow");
writeBytesUnaligned(RE.Addend, Target, 4);
break;
}
default:
llvm_unreachable("Relocation type not implemented yet!");
break;

14
test/ExecutionEngine/RuntimeDyld/X86/COFF_x86_64_IMGREL.s
View File

@ -24,3 +24,17 @@ inst1:
# rtdyld-check: decode_operand(inst2, 3) = section_addr(COFF_x86_64_IMGREL.o, .rdata)+5-40960000000000
inst2:
mov %ebx, (__constdata@imgrel+5)
.data
.space 375
rel1:
# rtdyld-check: *{4}rel1 = string - section_addr(COFF_x86_64_IMGREL.o, .data)
.secrel32 string
# We explicitly add padding to put string outside of the 16bit address space
# (absolute and as an offset from .data), so that relocations involving
# 32bit addresses / offsets are not accidentally truncated to 16 bits.
.space 65536
.global string
.align 1
string:
.asciz "Hello World\n"