* Korey Sewell
*/
-#include "arch/mips/isa_traits.hh"
#include "arch/mips/process.hh"
+
+#include "arch/mips/isa_traits.hh"
+#include "base/loader/elf_object.hh"
#include "base/loader/object_file.hh"
-#include "base/misc.hh"
+#include "base/logging.hh"
#include "cpu/thread_context.hh"
+#include "debug/Loader.hh"
+#include "mem/page_table.hh"
+#include "sim/aux_vector.hh"
+#include "sim/process.hh"
+#include "sim/process_impl.hh"
+#include "sim/syscall_return.hh"
#include "sim/system.hh"
using namespace std;
using namespace MipsISA;
-MipsLiveProcess::MipsLiveProcess(LiveProcessParams * params,
- ObjectFile *objFile)
- : LiveProcess(params, objFile)
+MipsProcess::MipsProcess(ProcessParams * params, ObjectFile *objFile)
+ : Process(params, objFile)
{
// Set up stack. On MIPS, stack starts at the top of kuseg
// user address space. MIPS stack grows down from here
- stack_base = 0x7FFFFFFF;
+ Addr stack_base = 0x7FFFFFFF;
+
+ Addr max_stack_size = 8 * 1024 * 1024;
// Set pointer for next thread stack. Reserve 8M for main stack.
- next_thread_stack_base = stack_base - (8 * 1024 * 1024);
+ Addr next_thread_stack_base = stack_base - max_stack_size;
// Set up break point (Top of Heap)
- brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize();
- brk_point = roundUp(brk_point, VMPageSize);
+ Addr brk_point = objFile->dataBase() + objFile->dataSize() +
+ objFile->bssSize();
+ brk_point = roundUp(brk_point, PageBytes);
+
+ // Set up region for mmaps. Start it 1GB above the top of the heap.
+ Addr mmap_end = brk_point + 0x40000000L;
+
+ memState = make_shared<MemState>(brk_point, stack_base, max_stack_size,
+ next_thread_stack_base, mmap_end);
+}
+
+void
+MipsProcess::initState()
+{
+ Process::initState();
+
+ argsInit<uint32_t>(PageBytes);
+}
+
+template<class IntType>
+void
+MipsProcess::argsInit(int pageSize)
+{
+ int intSize = sizeof(IntType);
+
+ // Patch the ld_bias for dynamic executables.
+ updateBias();
+
+ // load object file into target memory
+ objFile->loadSections(initVirtMem);
+
+ typedef AuxVector<IntType> auxv_t;
+ std::vector<auxv_t> auxv;
+
+ ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile);
+ if (elfObject)
+ {
+ // Set the system page size
+ auxv.push_back(auxv_t(M5_AT_PAGESZ, MipsISA::PageBytes));
+ // Set the frequency at which time() increments
+ auxv.push_back(auxv_t(M5_AT_CLKTCK, 100));
+ // For statically linked executables, this is the virtual
+ // address of the program header tables if they appear in the
+ // executable image.
+ auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable()));
+ DPRINTF(Loader, "auxv at PHDR %08p\n", elfObject->programHeaderTable());
+ // This is the size of a program header entry from the elf file.
+ auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize()));
+ // This is the number of program headers from the original elf file.
+ auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount()));
+ // This is the base address of the ELF interpreter; it should be
+ // zero for static executables or contain the base address for
+ // dynamic executables.
+ auxv.push_back(auxv_t(M5_AT_BASE, getBias()));
+ //The entry point to the program
+ auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint()));
+ //Different user and group IDs
+ auxv.push_back(auxv_t(M5_AT_UID, uid()));
+ auxv.push_back(auxv_t(M5_AT_EUID, euid()));
+ auxv.push_back(auxv_t(M5_AT_GID, gid()));
+ auxv.push_back(auxv_t(M5_AT_EGID, egid()));
+ }
+
+ // Calculate how much space we need for arg & env & auxv arrays.
+ int argv_array_size = intSize * (argv.size() + 1);
+ int envp_array_size = intSize * (envp.size() + 1);
+ int auxv_array_size = intSize * 2 * (auxv.size() + 1);
+
+ int arg_data_size = 0;
+ for (vector<string>::size_type i = 0; i < argv.size(); ++i) {
+ arg_data_size += argv[i].size() + 1;
+ }
+ int env_data_size = 0;
+ for (vector<string>::size_type i = 0; i < envp.size(); ++i) {
+ env_data_size += envp[i].size() + 1;
+ }
- // Set up region for mmaps. For now, start at bottom of kuseg space.
- mmap_start = mmap_end = 0x10000;
+ int space_needed =
+ argv_array_size +
+ envp_array_size +
+ auxv_array_size +
+ arg_data_size +
+ env_data_size;
+
+ // set bottom of stack
+ memState->setStackMin(memState->getStackBase() - space_needed);
+ // align it
+ memState->setStackMin(roundDown(memState->getStackMin(), pageSize));
+ memState->setStackSize(memState->getStackBase() - memState->getStackMin());
+ // map memory
+ allocateMem(memState->getStackMin(), roundUp(memState->getStackSize(),
+ pageSize));
+
+ // map out initial stack contents; leave room for argc
+ IntType argv_array_base = memState->getStackMin() + intSize;
+ IntType envp_array_base = argv_array_base + argv_array_size;
+ IntType auxv_array_base = envp_array_base + envp_array_size;
+ IntType arg_data_base = auxv_array_base + auxv_array_size;
+ IntType env_data_base = arg_data_base + arg_data_size;
+
+ // write contents to stack
+ IntType argc = argv.size();
+
+ argc = htog((IntType)argc);
+
+ initVirtMem.writeBlob(memState->getStackMin(), (uint8_t*)&argc, intSize);
+
+ copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
+
+ copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
+
+ // Copy the aux vector
+ for (typename vector<auxv_t>::size_type x = 0; x < auxv.size(); x++) {
+ initVirtMem.writeBlob(auxv_array_base + x * 2 * intSize,
+ (uint8_t*)&(auxv[x].a_type), intSize);
+ initVirtMem.writeBlob(auxv_array_base + (x * 2 + 1) * intSize,
+ (uint8_t*)&(auxv[x].a_val), intSize);
+ }
+
+ // Write out the terminating zeroed auxilliary vector
+ for (unsigned i = 0; i < 2; i++) {
+ const IntType zero = 0;
+ const Addr addr = auxv_array_base + 2 * intSize * (auxv.size() + i);
+ initVirtMem.writeBlob(addr, (uint8_t*)&zero, intSize);
+ }
+
+ ThreadContext *tc = system->getThreadContext(contextIds[0]);
+
+ setSyscallArg(tc, 0, argc);
+ setSyscallArg(tc, 1, argv_array_base);
+ tc->setIntReg(StackPointerReg, memState->getStackMin());
+
+ tc->pcState(getStartPC());
+}
+
+
+MipsISA::IntReg
+MipsProcess::getSyscallArg(ThreadContext *tc, int &i)
+{
+ assert(i < 6);
+ return tc->readIntReg(FirstArgumentReg + i++);
+}
+
+void
+MipsProcess::setSyscallArg(ThreadContext *tc, int i, MipsISA::IntReg val)
+{
+ assert(i < 6);
+ tc->setIntReg(FirstArgumentReg + i, val);
}
void
-MipsLiveProcess::startup()
+MipsProcess::setSyscallReturn(ThreadContext *tc, SyscallReturn sysret)
{
- argsInit(MachineBytes, VMPageSize);
+ if (sysret.successful()) {
+ // no error
+ tc->setIntReg(SyscallSuccessReg, 0);
+ tc->setIntReg(ReturnValueReg, sysret.returnValue());
+ } else {
+ // got an error, return details
+ tc->setIntReg(SyscallSuccessReg, (IntReg) -1);
+ tc->setIntReg(ReturnValueReg, sysret.errnoValue());
+ }
}
projects / gem5.git / blobdiff