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https://github.com/c64scene-ar/llvm-6502.git
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MC/Mach-O: Implement support for setting indirect symbol table offset in section header.
Also, create symbol data for LHS of assignment, to match 'as' symbol ordering better. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104033 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar
parent
56279f42b6
commit
2ae4bfd769
@ -216,6 +216,7 @@ void MCMachOStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
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void MCMachOStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
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// FIXME: Lift context changes into super class.
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Assembler.getOrCreateSymbolData(*Symbol);
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Symbol->setVariableValue(AddValueSymbols(Value));
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}
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@ -185,6 +185,7 @@ class MachObjectWriterImpl {
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llvm::DenseMap<const MCSectionData*,
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std::vector<MachRelocationEntry> > Relocations;
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llvm::DenseMap<const MCSectionData*, unsigned> IndirectSymBase;
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/// @}
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/// @name Symbol Table Data
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@ -325,7 +326,7 @@ public:
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Write32(NumRelocations ? RelocationsStart : 0);
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Write32(NumRelocations);
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Write32(Flags);
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Write32(0); // reserved1
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Write32(IndirectSymBase.lookup(&SD)); // reserved1
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Write32(Section.getStubSize()); // reserved2
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if (Is64Bit)
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Write32(0); // reserved3
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@ -815,20 +816,26 @@ public:
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// FIXME: Revisit this when the dust settles.
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// Bind non lazy symbol pointers first.
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unsigned IndirectIndex = 0;
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for (MCAssembler::indirect_symbol_iterator it = Asm.indirect_symbol_begin(),
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ie = Asm.indirect_symbol_end(); it != ie; ++it) {
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ie = Asm.indirect_symbol_end(); it != ie; ++it, ++IndirectIndex) {
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const MCSectionMachO &Section =
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cast<MCSectionMachO>(it->SectionData->getSection());
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if (Section.getType() != MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS)
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continue;
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// Initialize the section indirect symbol base, if necessary.
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if (!IndirectSymBase.count(it->SectionData))
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IndirectSymBase[it->SectionData] = IndirectIndex;
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Asm.getOrCreateSymbolData(*it->Symbol);
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}
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// Then lazy symbol pointers and symbol stubs.
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IndirectIndex = 0;
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for (MCAssembler::indirect_symbol_iterator it = Asm.indirect_symbol_begin(),
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ie = Asm.indirect_symbol_end(); it != ie; ++it) {
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ie = Asm.indirect_symbol_end(); it != ie; ++it, ++IndirectIndex) {
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const MCSectionMachO &Section =
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cast<MCSectionMachO>(it->SectionData->getSection());
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@ -836,6 +843,10 @@ public:
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Section.getType() != MCSectionMachO::S_SYMBOL_STUBS)
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continue;
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// Initialize the section indirect symbol base, if necessary.
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if (!IndirectSymBase.count(it->SectionData))
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IndirectSymBase[it->SectionData] = IndirectIndex;
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// Set the symbol type to undefined lazy, but only on construction.
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//
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// FIXME: Do not hardcode.
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188
test/MC/MachO/indirect-symbols.s
Normal file
188
test/MC/MachO/indirect-symbols.s
Normal file
@ -0,0 +1,188 @@
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// RUN: llvm-mc -triple i386-apple-darwin9 %s -filetype=obj -o - | macho-dump --dump-section-data | FileCheck %s
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_b:
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_c = 0
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_e:
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_f = 0
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.section __IMPORT,__jump_table,symbol_stubs,pure_instructions+self_modifying_code,5
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.indirect_symbol _a
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.ascii "\364\364\364\364\364"
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.indirect_symbol _b
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.ascii "\364\364\364\364\364"
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.indirect_symbol _c
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.ascii "\364\364\364\364\364"
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.section __IMPORT,__pointers,non_lazy_symbol_pointers
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.indirect_symbol _d
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.long 0
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.indirect_symbol _e
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.long 0
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.indirect_symbol _f
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.long 0
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// CHECK: ('cputype', 7)
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// CHECK: ('cpusubtype', 3)
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// CHECK: ('filetype', 1)
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// CHECK: ('num_load_commands', 1)
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// CHECK: ('load_commands_size', 364)
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// CHECK: ('flag', 0)
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// CHECK: ('load_commands', [
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// CHECK: # Load Command 0
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// CHECK: (('command', 1)
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// CHECK: ('size', 260)
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// CHECK: ('segment_name', '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
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// CHECK: ('vm_addr', 0)
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// CHECK: ('vm_size', 27)
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// CHECK: ('file_offset', 392)
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// CHECK: ('file_size', 27)
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// CHECK: ('maxprot', 7)
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// CHECK: ('initprot', 7)
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// CHECK: ('num_sections', 3)
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// CHECK: ('flags', 0)
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// CHECK: ('sections', [
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// CHECK: # Section 0
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// CHECK: (('section_name', '__text\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
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// CHECK: ('segment_name', '__TEXT\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
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// CHECK: ('address', 0)
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// CHECK: ('size', 0)
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// CHECK: ('offset', 392)
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// CHECK: ('alignment', 0)
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// CHECK: ('reloc_offset', 0)
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// CHECK: ('num_reloc', 0)
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// CHECK: ('flags', 0x80000000)
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// CHECK: ('reserved1', 0)
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// CHECK: ('reserved2', 0)
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// CHECK: ),
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// CHECK: ('_relocations', [
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// CHECK: ])
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// CHECK: ('_section_data', '')
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// CHECK: # Section 1
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// CHECK: (('section_name', '__jump_table\x00\x00\x00\x00')
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// CHECK: ('segment_name', '__IMPORT\x00\x00\x00\x00\x00\x00\x00\x00')
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// CHECK: ('address', 0)
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// CHECK: ('size', 15)
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// CHECK: ('offset', 392)
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// CHECK: ('alignment', 0)
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// CHECK: ('reloc_offset', 0)
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// CHECK: ('num_reloc', 0)
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// CHECK: ('flags', 0x84000008)
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// CHECK: ('reserved1', 0)
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// CHECK: ('reserved2', 5)
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// CHECK: ),
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// CHECK: ('_relocations', [
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// CHECK: ])
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// CHECK: ('_section_data', '\xf4\xf4\xf4\xf4\xf4\xf4\xf4\xf4\xf4\xf4\xf4\xf4\xf4\xf4\xf4')
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// CHECK: # Section 2
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// CHECK: (('section_name', '__pointers\x00\x00\x00\x00\x00\x00')
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// CHECK: ('segment_name', '__IMPORT\x00\x00\x00\x00\x00\x00\x00\x00')
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// CHECK: ('address', 15)
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// CHECK: ('size', 12)
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// CHECK: ('offset', 407)
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// CHECK: ('alignment', 0)
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// CHECK: ('reloc_offset', 0)
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// CHECK: ('num_reloc', 0)
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// CHECK: ('flags', 0x6)
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// CHECK: ('reserved1', 3)
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// CHECK: ('reserved2', 0)
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// CHECK: ),
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// CHECK: ('_relocations', [
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// CHECK: ])
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// CHECK: ('_section_data', '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
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// CHECK: ])
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// CHECK: ),
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// CHECK: # Load Command 1
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// CHECK: (('command', 2)
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// CHECK: ('size', 24)
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// CHECK: ('symoff', 444)
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// CHECK: ('nsyms', 6)
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// CHECK: ('stroff', 516)
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// CHECK: ('strsize', 20)
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// CHECK: ('_string_data', '\x00_d\x00_a\x00_b\x00_c\x00_e\x00_f\x00\x00')
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// CHECK: ('_symbols', [
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// CHECK: # Symbol 0
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// CHECK: (('n_strx', 7)
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// CHECK: ('n_type', 0xe)
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// CHECK: ('n_sect', 1)
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// CHECK: ('n_desc', 0)
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// CHECK: ('n_value', 0)
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// CHECK: ('_string', '_b')
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// CHECK: ),
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// CHECK: # Symbol 1
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// CHECK: (('n_strx', 10)
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// CHECK: ('n_type', 0x2)
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// CHECK: ('n_sect', 0)
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// CHECK: ('n_desc', 0)
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// CHECK: ('n_value', 0)
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// CHECK: ('_string', '_c')
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// CHECK: ),
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// CHECK: # Symbol 2
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// CHECK: (('n_strx', 13)
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// CHECK: ('n_type', 0xe)
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// CHECK: ('n_sect', 1)
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// CHECK: ('n_desc', 0)
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// CHECK: ('n_value', 0)
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// CHECK: ('_string', '_e')
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// CHECK: ),
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// CHECK: # Symbol 3
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// CHECK: (('n_strx', 16)
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// CHECK: ('n_type', 0x2)
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// CHECK: ('n_sect', 0)
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// CHECK: ('n_desc', 0)
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// CHECK: ('n_value', 0)
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// CHECK: ('_string', '_f')
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// CHECK: ),
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// CHECK: # Symbol 4
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// CHECK: (('n_strx', 4)
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// CHECK: ('n_type', 0x1)
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// CHECK: ('n_sect', 0)
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// CHECK: ('n_desc', 1)
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// CHECK: ('n_value', 0)
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// CHECK: ('_string', '_a')
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// CHECK: ),
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// CHECK: # Symbol 5
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// CHECK: (('n_strx', 1)
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// CHECK: ('n_type', 0x1)
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// CHECK: ('n_sect', 0)
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// CHECK: ('n_desc', 0)
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// CHECK: ('n_value', 0)
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// CHECK: ('_string', '_d')
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// CHECK: ),
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// CHECK: ])
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// CHECK: ),
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// CHECK: # Load Command 2
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// CHECK: (('command', 11)
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// CHECK: ('size', 80)
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// CHECK: ('ilocalsym', 0)
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// CHECK: ('nlocalsym', 4)
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// CHECK: ('iextdefsym', 4)
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// CHECK: ('nextdefsym', 0)
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// CHECK: ('iundefsym', 4)
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// CHECK: ('nundefsym', 2)
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// CHECK: ('tocoff', 0)
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// CHECK: ('ntoc', 0)
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// CHECK: ('modtaboff', 0)
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// CHECK: ('nmodtab', 0)
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// CHECK: ('extrefsymoff', 0)
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// CHECK: ('nextrefsyms', 0)
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// CHECK: ('indirectsymoff', 420)
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// CHECK: ('nindirectsyms', 6)
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// CHECK: ('extreloff', 0)
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// CHECK: ('nextrel', 0)
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// CHECK: ('locreloff', 0)
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// CHECK: ('nlocrel', 0)
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// CHECK: ('_indirect_symbols', [
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// CHECK: # Indirect Symbol 0
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// CHECK: (('symbol_index', 0x4),),
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// CHECK: # Indirect Symbol 1
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// CHECK: (('symbol_index', 0x0),),
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// CHECK: # Indirect Symbol 2
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// CHECK: (('symbol_index', 0x1),),
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// CHECK: # Indirect Symbol 3
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// CHECK: (('symbol_index', 0x5),),
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// CHECK: # Indirect Symbol 4
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// CHECK: (('symbol_index', 0x80000000),),
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// CHECK: # Indirect Symbol 5
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// CHECK: (('symbol_index', 0xc0000000),),
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// CHECK: ])
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// CHECK: ),
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// CHECK: ])
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