1/* 2 * Copyright (c) 2003-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; --- 32 unchanged lines hidden (view full) --- 41//The caller uses %o0-%05 for the first 6 arguments even if their floating 42//point. Double precision floating point values take two registers/args. 43//Quads, structs, and unions are passed as pointers. All arguments beyond 44//the sixth are passed on the stack past the 16 word window save area, 45//space for the struct/union return pointer, and space reserved for the 46//first 6 arguments which the caller may use but doesn't have to. 47uint64_t getArgument(ThreadContext *tc, int number, bool fp) { 48#if FULL_SYSTEM |
49 const int NumArgumentRegs = 6; |
50 if (number < NumArgumentRegs) { |
51 return tc->readIntReg(8 + number); |
52 } else { 53 Addr sp = tc->readIntReg(StackPointerReg); 54 VirtualPort *vp = tc->getVirtPort(); 55 uint64_t arg = vp->read<uint64_t>(sp + 92 + 56 (number-NumArgumentRegs) * sizeof(uint64_t)); 57 return arg; 58 } 59#else 60 panic("getArgument() only implemented for FULL_SYSTEM\n"); 61 M5_DUMMY_RETURN 62#endif 63} 64} //namespace SPARC_ISA |