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The code section for an ISR has a specific address.

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Currently, whether a function is ISR or not is encoded in the section attribute for that function.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96322 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Sanjiv Gupta 2010-02-16 03:41:07 +00:00
parent 6e303cb9fa
commit 7643ca5c2b
4 changed files with 23 additions and 4 deletions
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5
lib/Target/PIC16/AsmPrinter/PIC16AsmPrinter.cpp
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@ -106,8 +106,9 @@ bool PIC16AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
DbgInfo.BeginFunction(MF);
// Now emit the instructions of function in its code section.
const MCSection *fCodeSection
= getObjFileLowering().SectionForCode(CurrentFnSym->getName());
const MCSection *fCodeSection =
getObjFileLowering().SectionForCode(CurrentFnSym->getName(),
PAN::isISR(F->getSection()));
// Start the Code Section.
O << "\n";

13
lib/Target/PIC16/PIC16ABINames.h
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@ -325,6 +325,19 @@ namespace llvm {
return o.str();
}
// Return true if the current function is an ISR
inline static bool isISR(const std::string SectName) {
if (SectName.find("interrupt") != std::string::npos)
return true;
return false;
}
// Return the address for ISR starts in rom.
inline static std::string getISRAddr(void) {
return "0x4";
}
}; // class PAN.
} // end namespace llvm;

6
lib/Target/PIC16/PIC16TargetObjectFile.cpp
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@ -315,8 +315,12 @@ PIC16TargetObjectFile::allocateSHARED(const GlobalVariable *GV,
// Interface used by AsmPrinter to get a code section for a function.
const PIC16Section *
PIC16TargetObjectFile::SectionForCode(const std::string &FnName) const {
PIC16TargetObjectFile::SectionForCode(const std::string &FnName,
bool isISR) const {
const std::string &sec_name = PAN::getCodeSectionName(FnName);
// If it is ISR, its code section starts at a specific address.
if (isISR)
return getPIC16Section(sec_name, CODE, PAN::getISRAddr());
return getPIC16Section(sec_name, CODE);
}

3
lib/Target/PIC16/PIC16TargetObjectFile.h
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@ -137,7 +137,8 @@ namespace llvm {
/// Return a code section for a function.
const PIC16Section *SectionForCode (const std::string &FnName) const;
const PIC16Section *SectionForCode (const std::string &FnName,
bool isISR) const;
/// Return a frame section for a function.
const PIC16Section *SectionForFrame (const std::string &FnName) const;