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Refactor getSection() method to make it easier to use.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22455 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2005-07-16 17:36:04 +00:00
parent 5f9cb59f05
commit 0003395320
1 changed files with 15 additions and 19 deletions
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34
lib/CodeGen/ELFWriter.cpp
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@@ -2,8 +2,8 @@
// //
// The LLVM Compiler Infrastructure // The LLVM Compiler Infrastructure
// //
// This file was developed by the LLVM research group and is distributed under // This file was developed by Chris Lattner and is distributed under the
// the University of Illinois Open Source License. See LICENSE.TXT for details. // University of Illinois Open Source License. See LICENSE.TXT for details.
// //
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
// //
@@ -104,10 +104,9 @@ void ELFCodeEmitter::startFunction(MachineFunction &F) {
// Align the output buffer to the appropriate alignment. // Align the output buffer to the appropriate alignment.
unsigned Align = 16; // FIXME: GENERICIZE!! unsigned Align = 16; // FIXME: GENERICIZE!!
// Get the ELF Section that this function belongs in. // Get the ELF Section that this function belongs in.
ES = &EW.getSection(".text"); ES = &EW.getSection(".text", ELFWriter::ELFSection::SHT_PROGBITS,
ES->Type = ELFWriter::ELFSection::SHT_PROGBITS; ELFWriter::ELFSection::SHF_EXECINSTR |
ES->Flags = ELFWriter::ELFSection::SHF_EXECINSTR | ELFWriter::ELFSection::SHF_ALLOC);
ELFWriter::ELFSection::SHF_ALLOC;
OutBuffer = &ES->SectionData; OutBuffer = &ES->SectionData;
// Upgrade the section alignment if required. // Upgrade the section alignment if required.
@@ -215,7 +214,7 @@ bool ELFWriter::doInitialization(Module &M) {
outhalf(FH, 0); // e_shstrndx = Section # of '.shstrtab' outhalf(FH, 0); // e_shstrndx = Section # of '.shstrtab'
// Add the null section, which is required to be first in the file. // Add the null section, which is required to be first in the file.
getSection(""); getSection("", 0, 0);
// Start up the symbol table. The first entry in the symtab is the null // Start up the symbol table. The first entry in the symtab is the null
// entry. // entry.
@@ -316,13 +315,13 @@ bool ELFWriter::runOnMachineFunction(MachineFunction &MF) {
bool ELFWriter::doFinalization(Module &M) { bool ELFWriter::doFinalization(Module &M) {
// Okay, the ELF header and .text sections have been completed, build the // Okay, the ELF header and .text sections have been completed, build the
// .data, .bss, and "common" sections next. // .data, .bss, and "common" sections next.
ELFSection &DataSection = getSection(".data"); ELFSection &DataSection =
DataSection.Type = ELFSection::SHT_PROGBITS; getSection(".data", ELFSection::SHT_PROGBITS,
DataSection.Flags = ELFSection::SHF_WRITE | ELFSection::SHF_ALLOC; ELFSection::SHF_WRITE | ELFSection::SHF_ALLOC);
ELFSection &BSSSection = getSection(".bss"); ELFSection &BSSSection =
BSSSection.Type = ELFSection::SHT_NOBITS; getSection(".bss", ELFSection::SHT_NOBITS,
BSSSection.Flags = ELFSection::SHF_WRITE | ELFSection::SHF_ALLOC; ELFSection::SHF_WRITE | ELFSection::SHF_ALLOC);
for (Module::global_iterator I = M.global_begin(), E = M.global_end(); for (Module::global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I) I != E; ++I)
@@ -356,8 +355,7 @@ void ELFWriter::EmitSymbolTable() {
// FIXME: compact all local symbols to the start of the symtab. // FIXME: compact all local symbols to the start of the symtab.
unsigned FirstNonLocalSymbol = 1; unsigned FirstNonLocalSymbol = 1;
ELFSection &StrTab = getSection(".strtab"); ELFSection &StrTab = getSection(".strtab", ELFSection::SHT_STRTAB, 0);
StrTab.Type = ELFSection::SHT_STRTAB;
StrTab.Align = 1; StrTab.Align = 1;
DataBuffer &StrTabBuf = StrTab.SectionData; DataBuffer &StrTabBuf = StrTab.SectionData;
@@ -390,8 +388,7 @@ void ELFWriter::EmitSymbolTable() {
// Now that we have emitted the string table and know the offset into the // Now that we have emitted the string table and know the offset into the
// string table of each symbol, emit the symbol table itself. // string table of each symbol, emit the symbol table itself.
ELFSection &SymTab = getSection(".symtab"); ELFSection &SymTab = getSection(".symtab", ELFSection::SHT_SYMTAB, 0);
SymTab.Type = ELFSection::SHT_SYMTAB;
SymTab.Align = is64Bit ? 8 : 4; SymTab.Align = is64Bit ? 8 : 4;
SymTab.Link = SymTab.SectionIdx; // Section Index of .strtab. SymTab.Link = SymTab.SectionIdx; // Section Index of .strtab.
SymTab.Info = FirstNonLocalSymbol; // First non-STB_LOCAL symbol. SymTab.Info = FirstNonLocalSymbol; // First non-STB_LOCAL symbol.
@@ -428,8 +425,7 @@ void ELFWriter::EmitSymbolTable() {
/// section names. /// section names.
void ELFWriter::EmitSectionTableStringTable() { void ELFWriter::EmitSectionTableStringTable() {
// First step: add the section for the string table to the list of sections: // First step: add the section for the string table to the list of sections:
ELFSection &SHStrTab = getSection(".shstrtab"); ELFSection &SHStrTab = getSection(".shstrtab", ELFSection::SHT_STRTAB, 0);
SHStrTab.Type = ELFSection::SHT_STRTAB;
// Now that we know which section number is the .shstrtab section, update the // Now that we know which section number is the .shstrtab section, update the
// e_shstrndx entry in the ELF header. // e_shstrndx entry in the ELF header.