2 * Copyright (c) 2004-2005 The Regents of The University of Michigan
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14 * this software without specific prior written permission.
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33 #include "arch/mips/isa_traits.hh"
34 #include "arch/mips/process.hh"
35 #include "base/loader/object_file.hh"
36 #include "base/misc.hh"
37 #include "cpu/thread_context.hh"
38 #include "sim/system.hh"
41 using namespace MipsISA
;
43 MipsLiveProcess::MipsLiveProcess(LiveProcessParams
* params
,
45 : LiveProcess(params
, objFile
)
47 // Set up stack. On MIPS, stack starts at the top of kuseg
48 // user address space. MIPS stack grows down from here
49 stack_base
= 0x7FFFFFFF;
51 // Set pointer for next thread stack. Reserve 8M for main stack.
52 next_thread_stack_base
= stack_base
- (8 * 1024 * 1024);
54 // Set up break point (Top of Heap)
55 brk_point
= objFile
->dataBase() + objFile
->dataSize() + objFile
->bssSize();
56 brk_point
= roundUp(brk_point
, VMPageSize
);
58 // Set up region for mmaps. For now, start at bottom of kuseg space.
59 mmap_start
= mmap_end
= 0x10000;
63 MipsLiveProcess::startup()
65 argsInit(MachineBytes
, VMPageSize
);
69 MipsLiveProcess::getSyscallArg(ThreadContext
*tc
, int i
)
72 return tc
->readIntReg(FirstArgumentReg
+ i
);
76 MipsLiveProcess::setSyscallArg(ThreadContext
*tc
,
77 int i
, MipsISA::IntReg val
)
80 tc
->setIntReg(FirstArgumentReg
+ i
, val
);
84 MipsLiveProcess::setSyscallReturn(ThreadContext
*tc
,
85 SyscallReturn return_value
)
87 if (return_value
.successful()) {
89 tc
->setIntReg(SyscallSuccessReg
, 0);
90 tc
->setIntReg(ReturnValueReg
, return_value
.value());
92 // got an error, return details
93 tc
->setIntReg(SyscallSuccessReg
, (IntReg
) -1);
94 tc
->setIntReg(ReturnValueReg
, -return_value
.value());