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[JITLink] Make sure MachO/x86-64 handles 32-bit signed addends correctly.

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These need to be sign extended when loading into Edge addends.
This commit is contained in:
Lang Hames 2019-11-27 22:25:59 -08:00
parent 9e41c6db8c
commit 0a4ed7d874
2 changed files with 27 additions and 16 deletions
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8
lib/ExecutionEngine/JITLink/MachO_x86_64.cpp
View File

@ -252,7 +252,7 @@ private:
TargetSymbol = TargetSymbolOrErr->GraphSymbol;
else
return TargetSymbolOrErr.takeError();
Addend = *(const ulittle32_t *)FixupContent;
Addend = *(const little32_t *)FixupContent;
break;
case Pointer32:
if (auto TargetSymbolOrErr = findSymbolByIndex(RI.r_symbolnum))
@ -284,12 +284,12 @@ private:
TargetSymbol = TargetSymbolOrErr->GraphSymbol;
else
return TargetSymbolOrErr.takeError();
Addend = *(const ulittle32_t *)FixupContent +
Addend = *(const little32_t *)FixupContent +
(1 << (*Kind - PCRel32Minus1));
break;
case PCRel32Anon: {
JITTargetAddress TargetAddress =
FixupAddress + 4 + *(const ulittle32_t *)FixupContent;
FixupAddress + 4 + *(const little32_t *)FixupContent;
if (auto TargetSymbolOrErr = findSymbolByAddress(TargetAddress))
TargetSymbol = &*TargetSymbolOrErr;
else
@ -303,7 +303,7 @@ private:
JITTargetAddress Delta =
static_cast<JITTargetAddress>(1ULL << (*Kind - PCRel32Minus1Anon));
JITTargetAddress TargetAddress =
FixupAddress + 4 + Delta + *(const ulittle32_t *)FixupContent;
FixupAddress + 4 + Delta + *(const little32_t *)FixupContent;
if (auto TargetSymbolOrErr = findSymbolByAddress(TargetAddress))
TargetSymbol = &*TargetSymbolOrErr;
else

35
test/ExecutionEngine/JITLink/X86/MachO_x86-64_relocations.s
View File

@ -40,6 +40,17 @@ test_gotld:
movq external_data@GOTPCREL(%rip), %rax
retq
# Check X86_64_RELOC_GOTPCREL handling with cmp instructions, which have
# negative addends.
#
# jitlink-check: decode_operand(test_gotcmpq, 3) = got_addr(macho_reloc.o, external_data) - next_pc(test_gotcmpq)
.globl test_gotcmpq
.align 4, 0x90
test_gotcmpq:
cmpq $0, external_data@GOTPCREL(%rip)
retq
# Check that calls to external functions trigger the generation of stubs and GOT
# entries.
#
@ -118,16 +129,16 @@ Lanon_data:
# anonymous.
#
# Note: +8 offset in expression below to accounts for sizeof(Lanon_data).
# jitlink-check: *{8}(section_addr(macho_reloc.o, __data) + 8) = (section_addr(macho_reloc.o, __data) + 8) - named_data + 2
# jitlink-check: *{8}(section_addr(macho_reloc.o, __data) + 8) = (section_addr(macho_reloc.o, __data) + 8) - named_data - 2
.p2align 3
Lanon_minuend_quad:
.quad Lanon_minuend_quad - named_data + 2
.quad Lanon_minuend_quad - named_data - 2
# Note: +16 offset in expression below to accounts for sizeof(Lanon_data) + sizeof(Lanon_minuend_long).
# jitlink-check: *{4}(section_addr(macho_reloc.o, __data) + 16) = ((section_addr(macho_reloc.o, __data) + 16) - named_data + 2)[31:0]
# jitlink-check: *{4}(section_addr(macho_reloc.o, __data) + 16) = ((section_addr(macho_reloc.o, __data) + 16) - named_data - 2)[31:0]
.p2align 2
Lanon_minuend_long:
.long Lanon_minuend_long - named_data + 2
.long Lanon_minuend_long - named_data - 2
# Named quad storage target (first named atom in __data).
.globl named_data
@ -221,11 +232,11 @@ minuend_long3:
# (i.e. is part of an alt_entry chain that includes 'A').
#
# Check "A: .long B - C + D" where 'B' is an alt_entry for 'A'.
# jitlink-check: *{4}subtractor_with_alt_entry_minuend_long = (subtractor_with_alt_entry_minuend_long_B - named_data + 2)[31:0]
# jitlink-check: *{4}subtractor_with_alt_entry_minuend_long = (subtractor_with_alt_entry_minuend_long_B - named_data - 2)[31:0]
.globl subtractor_with_alt_entry_minuend_long
.p2align 2
subtractor_with_alt_entry_minuend_long:
.long subtractor_with_alt_entry_minuend_long_B - named_data + 2
.long subtractor_with_alt_entry_minuend_long_B - named_data - 2
.globl subtractor_with_alt_entry_minuend_long_B
.p2align 2
@ -234,11 +245,11 @@ subtractor_with_alt_entry_minuend_long_B:
.long 0
# Check "A: .quad B - C + D" where 'B' is an alt_entry for 'A'.
# jitlink-check: *{8}subtractor_with_alt_entry_minuend_quad = (subtractor_with_alt_entry_minuend_quad_B - named_data + 2)
# jitlink-check: *{8}subtractor_with_alt_entry_minuend_quad = (subtractor_with_alt_entry_minuend_quad_B - named_data - 2)
.globl subtractor_with_alt_entry_minuend_quad
.p2align 3
subtractor_with_alt_entry_minuend_quad:
.quad subtractor_with_alt_entry_minuend_quad_B - named_data + 2
.quad subtractor_with_alt_entry_minuend_quad_B - named_data - 2
.globl subtractor_with_alt_entry_minuend_quad_B
.p2align 3
@ -247,11 +258,11 @@ subtractor_with_alt_entry_minuend_quad_B:
.quad 0
# Check "A: .long B - C + D" where 'C' is an alt_entry for 'A'.
# jitlink-check: *{4}subtractor_with_alt_entry_subtrahend_long = (named_data - subtractor_with_alt_entry_subtrahend_long_B + 2)[31:0]
# jitlink-check: *{4}subtractor_with_alt_entry_subtrahend_long = (named_data - subtractor_with_alt_entry_subtrahend_long_B - 2)[31:0]
.globl subtractor_with_alt_entry_subtrahend_long
.p2align 2
subtractor_with_alt_entry_subtrahend_long:
.long named_data - subtractor_with_alt_entry_subtrahend_long_B + 2
.long named_data - subtractor_with_alt_entry_subtrahend_long_B - 2
.globl subtractor_with_alt_entry_subtrahend_long_B
.p2align 2
@ -260,11 +271,11 @@ subtractor_with_alt_entry_subtrahend_long_B:
.long 0
# Check "A: .quad B - C + D" where 'B' is an alt_entry for 'A'.
# jitlink-check: *{8}subtractor_with_alt_entry_subtrahend_quad = (named_data - subtractor_with_alt_entry_subtrahend_quad_B + 2)
# jitlink-check: *{8}subtractor_with_alt_entry_subtrahend_quad = (named_data - subtractor_with_alt_entry_subtrahend_quad_B - 2)
.globl subtractor_with_alt_entry_subtrahend_quad
.p2align 3
subtractor_with_alt_entry_subtrahend_quad:
.quad named_data - subtractor_with_alt_entry_subtrahend_quad_B + 2
.quad named_data - subtractor_with_alt_entry_subtrahend_quad_B - 2
.globl subtractor_with_alt_entry_subtrahend_quad_B
.p2align 3