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Revert commit 80428. It completely broke exception

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handling on x86-32 linux.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80592 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands
2009-08-31 16:45:16 +00:00
parent 2cd5155c0e
commit c69d74a5d4
6 changed files with 18 additions and 137 deletions
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47
lib/CodeGen/AsmPrinter/DwarfException.cpp
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@@ -22,7 +22,6 @@
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetFrameInfo.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetLowering.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Support/Dwarf.h"
@@ -81,7 +80,6 @@ void DwarfException::EmitCIE(const Function *Personality, unsigned Index) {
EmitLabel("eh_frame_common_begin", Index);
Asm->EmitInt32((int)0);
Asm->EOL("CIE Identifier Tag");
Asm->EmitInt8(dwarf::DW_CIE_VERSION);
Asm->EOL("CIE Version");
@@ -93,29 +91,23 @@ void DwarfException::EmitCIE(const Function *Personality, unsigned Index) {
// Round out reader.
Asm->EmitULEB128Bytes(1);
Asm->EOL("CIE Code Alignment Factor");
Asm->EmitSLEB128Bytes(stackGrowth);
Asm->EOL("CIE Data Alignment Factor");
Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), true));
Asm->EOL("CIE Return Address Column");
unsigned Encoding = 0;
// If there is a personality, we need to indicate the function's location.
if (Personality) {
Asm->EmitULEB128Bytes(7);
Asm->EOL("Augmentation Size");
if (MAI->getNeedsIndirectEncoding()) {
Encoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4 |
dwarf::DW_EH_PE_indirect;
Asm->EmitInt8(Encoding);
Asm->EOL("Personality", Encoding);
Asm->EmitInt8(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4 |
dwarf::DW_EH_PE_indirect);
Asm->EOL("Personality (pcrel sdata4 indirect)");
} else {
Encoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
Asm->EmitInt8(Encoding);
Asm->EOL("Personality", Encoding);
Asm->EmitInt8(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4);
Asm->EOL("Personality (pcrel sdata4)");
}
PrintRelDirective(true);
@@ -126,20 +118,17 @@ void DwarfException::EmitCIE(const Function *Personality, unsigned Index) {
O << "-" << MAI->getPCSymbol();
Asm->EOL("Personality");
Encoding = Asm->TM.getTargetLowering()->getPreferredLSDADataFormat();
Asm->EmitInt8(Encoding);
Asm->EOL("LSDA Encoding", Encoding);
Asm->EmitInt8(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4);
Asm->EOL("LSDA Encoding (pcrel sdata4)");
Encoding = Asm->TM.getTargetLowering()->getPreferredFDEDataFormat();
Asm->EmitInt8(Encoding);
Asm->EOL("FDE Encoding", Encoding);
Asm->EmitInt8(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4);
Asm->EOL("FDE Encoding (pcrel sdata4)");
} else {
Asm->EmitULEB128Bytes(1);
Asm->EOL("Augmentation Size");
Encoding = Asm->TM.getTargetLowering()->getPreferredFDEDataFormat();
Asm->EmitInt8(Encoding);
Asm->EOL("FDE Encoding", Encoding);
Asm->EmitInt8(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4);
Asm->EOL("FDE Encoding (pcrel sdata4)");
}
// Indicate locations of general callee saved registers in frame.
@@ -163,7 +152,6 @@ void DwarfException::EmitFDE(const FunctionEHFrameInfo &EHFrameInfo) {
"Should not emit 'available externally' functions at all");
const Function *TheFunc = EHFrameInfo.function;
bool is4Byte = TD->getPointerSize() == sizeof(int32_t);
Asm->OutStreamer.SwitchSection(Asm->getObjFileLowering().getEHFrameSection());
@@ -207,22 +195,23 @@ void DwarfException::EmitFDE(const FunctionEHFrameInfo &EHFrameInfo) {
Asm->EOL("FDE CIE offset");
EmitReference("eh_func_begin", EHFrameInfo.Number, true, is4Byte);
EmitReference("eh_func_begin", EHFrameInfo.Number, true, true);
Asm->EOL("FDE initial location");
EmitDifference("eh_func_end", EHFrameInfo.Number,
"eh_func_begin", EHFrameInfo.Number, is4Byte);
"eh_func_begin", EHFrameInfo.Number, true);
Asm->EOL("FDE address range");
// If there is a personality and landing pads then point to the language
// specific data area in the exception table.
if (MMI->getPersonalities()[0] != NULL) {
bool is4Byte = TD->getPointerSize() == sizeof(int32_t);
Asm->EmitULEB128Bytes(is4Byte ? 4 : 8);
Asm->EOL("Augmentation size");
if (EHFrameInfo.hasLandingPads) {
if (EHFrameInfo.hasLandingPads)
EmitReference("exception", EHFrameInfo.Number, true, false);
} else {
else {
if (is4Byte)
Asm->EmitInt32((int)0);
else
@@ -930,8 +919,6 @@ void DwarfException::EndFunction() {
MF->getFunction()));
}
MF = 0;
if (TimePassesIsEnabled)
ExceptionTimer->stopTimer();
}