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Fix absolute recording of differences of symbols in two sections. Reduced from ctor_dtor_count-2.cpp.

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llvm-svn: 121152
This commit is contained in:
Rafael Espindola 2010-12-07 17:12:32 +00:00
parent 7979bb402f
commit 866531d633
2 changed files with 75 additions and 0 deletions
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11
lib/MC/MachObjectWriter.cpp
View File

@ -884,6 +884,17 @@ public:
// FIXME: Currently, these are never generated (see code below). I cannot
// find a case where they are actually emitted.
Type = macho::RIT_Vanilla;
} else if (SD->getSymbol().isVariable()) {
const MCExpr *Value = SD->getSymbol().getVariableValue();
int64_t Res;
bool isAbs = Value->EvaluateAsAbsolute(Res, Layout, SectionAddress);
if (isAbs) {
FixedValue = Res;
return;
} else {
report_fatal_error("unsupported relocation of variable '" +
SD->getSymbol().getName() + "'");
}
} else {
// Check whether we need an external or internal relocation.
if (doesSymbolRequireExternRelocation(SD)) {

64
test/MC/MachO/diff-with-two-sections.s Normal file
View File

@ -0,0 +1,64 @@
// RUN: llvm-mc -triple i386-apple-darwin9 %s -filetype=obj -o - | macho-dump --dump-section-data | FileCheck %s
.section __TEXT,__text,regular,pure_instructions
Leh_func_begin0:
.section __TEXT,__eh_frame,coalesced,no_toc+strip_static_syms+live_support
Ltmp3:
Ltmp4 = Leh_func_begin0-Ltmp3
.long Ltmp4
// CHECK: ('cputype', 7)
// CHECK-NEXT: ('cpusubtype', 3)
// CHECK-NEXT: ('filetype', 1)
// CHECK-NEXT: ('num_load_commands', 1)
// CHECK-NEXT: ('load_commands_size', 192)
// CHECK-NEXT: ('flag', 0)
// CHECK-NEXT: ('load_commands', [
// CHECK-NEXT: # Load Command 0
// CHECK-NEXT: (('command', 1)
// CHECK-NEXT: ('size', 192)
// CHECK-NEXT: ('segment_name', '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
// CHECK-NEXT: ('vm_addr', 0)
// CHECK-NEXT: ('vm_size', 4)
// CHECK-NEXT: ('file_offset', 220)
// CHECK-NEXT: ('file_size', 4)
// CHECK-NEXT: ('maxprot', 7)
// CHECK-NEXT: ('initprot', 7)
// CHECK-NEXT: ('num_sections', 2)
// CHECK-NEXT: ('flags', 0)
// CHECK-NEXT: ('sections', [
// CHECK-NEXT: # Section 0
// CHECK-NEXT: (('section_name', '__text\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
// CHECK-NEXT: ('segment_name', '__TEXT\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
// CHECK-NEXT: ('address', 0)
// CHECK-NEXT: ('size', 0)
// CHECK-NEXT: ('offset', 220)
// CHECK-NEXT: ('alignment', 0)
// CHECK-NEXT: ('reloc_offset', 0)
// CHECK-NEXT: ('num_reloc', 0)
// CHECK-NEXT: ('flags', 0x80000000)
// CHECK-NEXT: ('reserved1', 0)
// CHECK-NEXT: ('reserved2', 0)
// CHECK-NEXT: ),
// CHECK-NEXT: ('_relocations', [
// CHECK-NEXT: ])
// CHECK-NEXT: ('_section_data', '')
// CHECK-NEXT: # Section 1
// CHECK-NEXT: (('section_name', '__eh_frame\x00\x00\x00\x00\x00\x00')
// CHECK-NEXT: ('segment_name', '__TEXT\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
// CHECK-NEXT: ('address', 0)
// CHECK-NEXT: ('size', 4)
// CHECK-NEXT: ('offset', 220)
// CHECK-NEXT: ('alignment', 0)
// CHECK-NEXT: ('reloc_offset', 0)
// CHECK-NEXT: ('num_reloc', 0)
// CHECK-NEXT: ('flags', 0x6800000b)
// CHECK-NEXT: ('reserved1', 0)
// CHECK-NEXT: ('reserved2', 0)
// CHECK-NEXT: ),
// CHECK-NEXT: ('_relocations', [
// CHECK-NEXT: ])
// CHECK-NEXT: ('_section_data', '00000000')
// CHECK-NEXT: ])
// CHECK-NEXT: ),
// CHECK-NEXT: ])