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move ELF-specific code into ELFTargetAsmInfo.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76976 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-07-24 17:02:17 +00:00
parent e5ca0ac36b
commit 2dcafe4b8f
4 changed files with 40 additions and 26 deletions
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5
include/llvm/Target/ELFTargetAsmInfo.h
View File

@ -31,6 +31,11 @@ namespace llvm {
virtual const Section *
getSectionForMergableConstant(uint64_t Size, unsigned ReloInfo) const;
/// getFlagsForNamedSection - If this target wants to be able to infer
/// section flags based on the name of the section specified for a global
/// variable, it can implement this. This is used on ELF systems so that
/// ".tbss" gets the TLS bit set etc.
virtual unsigned getFlagsForNamedSection(const char *Section) const;
SectionKind::Kind SectionKindForGlobal(const GlobalValue *GV) const;
virtual const Section* SelectSectionForGlobal(const GlobalValue *GV) const;

8
include/llvm/Target/TargetAsmInfo.h
View File

@ -586,7 +586,13 @@ namespace llvm {
virtual const char *
getSectionPrefixForUniqueGlobal(SectionKind::Kind Kind) const;
/// getFlagsForNamedSection - If this target wants to be able to infer
/// section flags based on the name of the section specified for a global
/// variable, it can implement this. This is used on ELF systems so that
/// ".tbss" gets the TLS bit set etc.
virtual unsigned getFlagsForNamedSection(const char *Section) const {
return 0;
}
/// SectionKindForGlobal - This hook allows the target to select proper

27
lib/Target/ELFTargetAsmInfo.cpp
View File

@ -145,6 +145,33 @@ ELFTargetAsmInfo::getSectionForMergableConstant(uint64_t Size,
return getReadOnlySection(); // .rodata
}
/// getFlagsForNamedSection - If this target wants to be able to infer
/// section flags based on the name of the section specified for a global
/// variable, it can implement this.
unsigned ELFTargetAsmInfo::getFlagsForNamedSection(const char *Name) const {
unsigned Flags = 0;
if (Name[0] != '.') return 0;
// Some lame default implementation based on some magic section names.
if (strncmp(Name, ".gnu.linkonce.b.", 16) == 0 ||
strncmp(Name, ".llvm.linkonce.b.", 17) == 0 ||
strncmp(Name, ".gnu.linkonce.sb.", 17) == 0 ||
strncmp(Name, ".llvm.linkonce.sb.", 18) == 0)
Flags |= SectionFlags::BSS;
else if (strcmp(Name, ".tdata") == 0 ||
strncmp(Name, ".tdata.", 7) == 0 ||
strncmp(Name, ".gnu.linkonce.td.", 17) == 0 ||
strncmp(Name, ".llvm.linkonce.td.", 18) == 0)
Flags |= SectionFlags::TLS;
else if (strcmp(Name, ".tbss") == 0 ||
strncmp(Name, ".tbss.", 6) == 0 ||
strncmp(Name, ".gnu.linkonce.tb.", 17) == 0 ||
strncmp(Name, ".llvm.linkonce.tb.", 18) == 0)
Flags |= SectionFlags::BSS | SectionFlags::TLS;
return Flags;
}
const Section*
ELFTargetAsmInfo::MergeableStringSection(const GlobalVariable *GV) const {

26
lib/Target/TargetAsmInfo.cpp
View File

@ -224,30 +224,6 @@ static unsigned SectionFlagsForGlobal(const GlobalValue *GV,
return Flags;
}
static unsigned GetSectionFlagsForNamedELFSection(const char *Name) {
unsigned Flags = 0;
// Some lame default implementation based on some magic section names.
if (strncmp(Name, ".gnu.linkonce.b.", 16) == 0 ||
strncmp(Name, ".llvm.linkonce.b.", 17) == 0 ||
strncmp(Name, ".gnu.linkonce.sb.", 17) == 0 ||
strncmp(Name, ".llvm.linkonce.sb.", 18) == 0)
Flags |= SectionFlags::BSS;
else if (strcmp(Name, ".tdata") == 0 ||
strncmp(Name, ".tdata.", 7) == 0 ||
strncmp(Name, ".gnu.linkonce.td.", 17) == 0 ||
strncmp(Name, ".llvm.linkonce.td.", 18) == 0)
Flags |= SectionFlags::TLS;
else if (strcmp(Name, ".tbss") == 0 ||
strncmp(Name, ".tbss.", 6) == 0 ||
strncmp(Name, ".gnu.linkonce.tb.", 17) == 0 ||
strncmp(Name, ".llvm.linkonce.tb.", 18) == 0)
Flags |= SectionFlags::BSS | SectionFlags::TLS;
return Flags;
}
SectionKind::Kind
TargetAsmInfo::SectionKindForGlobal(const GlobalValue *GV) const {
// Early exit - functions should be always in text sections.
@ -298,7 +274,7 @@ const Section *TargetAsmInfo::SectionForGlobal(const GlobalValue *GV) const {
// If the target has magic semantics for certain section names, make sure to
// pick up the flags. This allows the user to write things with attribute
// section and still get the appropriate section flags printed.
Flags |= GetSectionFlagsForNamedELFSection(GV->getSection().c_str());
Flags |= getFlagsForNamedSection(GV->getSection().c_str());
return getNamedSection(GV->getSection().c_str(), Flags);
}