diff options
Diffstat (limited to 'src/arch/mips/process.cc')
-rw-r--r-- | src/arch/mips/process.cc | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/src/arch/mips/process.cc b/src/arch/mips/process.cc index b7bd22d78..784ddfe33 100644 --- a/src/arch/mips/process.cc +++ b/src/arch/mips/process.cc @@ -40,6 +40,10 @@ using namespace std; using namespace MipsISA; +static const int SyscallSuccessReg = 7; +static const int FirstArgumentReg = 4; +static const int ReturnValueReg = 2; + MipsLiveProcess::MipsLiveProcess(LiveProcessParams * params, ObjectFile *objFile) : LiveProcess(params, objFile) @@ -64,3 +68,33 @@ MipsLiveProcess::startup() { argsInit(MachineBytes, VMPageSize); } + +MipsISA::IntReg +MipsLiveProcess::getSyscallArg(ThreadContext *tc, int i) +{ + assert(i < 6); + return tc->readIntReg(FirstArgumentReg + i); +} + +void +MipsLiveProcess::setSyscallArg(ThreadContext *tc, + int i, MipsISA::IntReg val) +{ + assert(i < 6); + tc->setIntReg(FirstArgumentReg + i, val); +} + +void +MipsLiveProcess::setSyscallReturn(ThreadContext *tc, + SyscallReturn return_value) +{ + if (return_value.successful()) { + // no error + tc->setIntReg(SyscallSuccessReg, 0); + tc->setIntReg(ReturnValueReg, return_value.value()); + } else { + // got an error, return details + tc->setIntReg(SyscallSuccessReg, (IntReg) -1); + tc->setIntReg(ReturnValueReg, -return_value.value()); + } +} |