* Ali Saidi
*/
-#include "arch/alpha/isa_traits.hh"
#include "arch/alpha/process.hh"
+
+#include "arch/alpha/isa_traits.hh"
+#include "base/loader/elf_object.hh"
#include "base/loader/object_file.hh"
#include "base/misc.hh"
#include "cpu/thread_context.hh"
+#include "debug/Loader.hh"
+#include "mem/page_table.hh"
+#include "sim/aux_vector.hh"
+#include "sim/byteswap.hh"
+#include "sim/process_impl.hh"
+#include "sim/syscall_return.hh"
#include "sim/system.hh"
-
using namespace AlphaISA;
using namespace std;
-AlphaLiveProcess::AlphaLiveProcess(const std::string &nm, ObjectFile *objFile,
- System *_system, int stdin_fd, int stdout_fd, int stderr_fd,
- std::vector<std::string> &argv, std::vector<std::string> &envp,
- uint64_t _uid, uint64_t _euid, uint64_t _gid, uint64_t _egid,
- uint64_t _pid, uint64_t _ppid)
- : LiveProcess(nm, objFile, _system, stdin_fd, stdout_fd, stderr_fd,
- argv, envp, _uid, _euid, _gid, _egid, _pid, _ppid)
+AlphaProcess::AlphaProcess(ProcessParams *params, ObjectFile *objFile)
+ : Process(params, objFile)
{
- 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 stack. On Alpha, stack goes below text section. This
// code should get moved to some architecture-specific spot.
- stack_base = objFile->textBase() - (409600+4096);
+ Addr stack_base = objFile->textBase() - (409600+4096);
+
+ // Set up region for mmaps.
+ Addr mmap_end = 0x10000;
- // Set up region for mmaps. Tru64 seems to start just above 0 and
- // grow up from there.
- mmap_start = mmap_end = 0x10000;
+ 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;
+ memState = make_shared<MemState>(brk_point, stack_base, max_stack_size,
+ next_thread_stack_base, mmap_end);
}
void
-AlphaLiveProcess::startup()
+AlphaProcess::argsInit(int intSize, int pageSize)
{
- argsInit(MachineBytes, VMPageSize);
+ // Patch the ld_bias for dynamic executables.
+ updateBias();
+
+ objFile->loadSections(initVirtMem);
+
+ typedef AuxVector<uint64_t> auxv_t;
+ std::vector<auxv_t> auxv;
+
+ ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile);
+ if (elfObject)
+ {
+ // modern glibc uses a bunch of auxiliary vectors to set up
+ // TLS as well as do a bunch of other stuff
+ // these vectors go on the bottom of the stack, below argc/argv/envp
+ // pointers but above actual arg strings
+ // I don't have all the ones glibc looks at here, but so far it doesn't
+ // seem to be a problem.
+ // check out _dl_aux_init() in glibc/elf/dl-support.c for details
+ // --Lisa
+ auxv.push_back(auxv_t(M5_AT_PAGESZ, AlphaISA::PageBytes));
+ auxv.push_back(auxv_t(M5_AT_CLKTCK, 100));
+ auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable()));
+ DPRINTF(Loader, "auxv at PHDR %08p\n", elfObject->programHeaderTable());
+ 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()));
+ auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint()));
+ 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;
+ }
+
+ int space_needed =
+ argv_array_size +
+ envp_array_size +
+ auxv_array_size +
+ arg_data_size +
+ env_data_size;
- threadContexts[0]->setIntReg(GlobalPointerReg, objFile->globalPointer());
+ if (space_needed < 32*1024)
+ space_needed = 32*1024;
+
+ // 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
+ Addr argv_array_base = memState->getStackMin() + intSize; // room for argc
+ Addr envp_array_base = argv_array_base + argv_array_size;
+ Addr auxv_array_base = envp_array_base + envp_array_size;
+ Addr arg_data_base = auxv_array_base + auxv_array_size;
+ Addr env_data_base = arg_data_base + arg_data_size;
+
+ // write contents to stack
+ uint64_t argc = argv.size();
+ if (intSize == 8)
+ argc = htog((uint64_t)argc);
+ else if (intSize == 4)
+ argc = htog((uint32_t)argc);
+ else
+ panic("Unknown int size");
+
+ 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 stuff
+ for (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);
+ }
+
+ ThreadContext *tc = system->getThreadContext(contextIds[0]);
+
+ setSyscallArg(tc, 0, argc);
+ setSyscallArg(tc, 1, argv_array_base);
+ tc->setIntReg(StackPointerReg, memState->getStackMin());
+
+ tc->pcState(getStartPC());
}
+void
+AlphaProcess::setupASNReg()
+{
+ ThreadContext *tc = system->getThreadContext(contextIds[0]);
+ tc->setMiscRegNoEffect(IPR_DTB_ASN, _pid << 57);
+}
+
+void
+AlphaProcess::unserialize(CheckpointIn &cp)
+{
+ Process::unserialize(cp);
+ // need to set up ASN after unserialization since _pid value may
+ // come from checkpoint
+ setupASNReg();
+}
+
+
+void
+AlphaProcess::initState()
+{
+ // need to set up ASN before further initialization since init
+ // will involve writing to virtual memory addresses
+ setupASNReg();
+
+ Process::initState();
+
+ argsInit(MachineBytes, PageBytes);
+
+ ThreadContext *tc = system->getThreadContext(contextIds[0]);
+ tc->setIntReg(GlobalPointerReg, objFile->globalPointer());
+ //Operate in user mode
+ tc->setMiscRegNoEffect(IPR_ICM, mode_user << 3);
+ tc->setMiscRegNoEffect(IPR_DTB_CM, mode_user << 3);
+ //No super page mapping
+ tc->setMiscRegNoEffect(IPR_MCSR, 0);
+}
+
+AlphaISA::IntReg
+AlphaProcess::getSyscallArg(ThreadContext *tc, int &i)
+{
+ assert(i < 6);
+ return tc->readIntReg(FirstArgumentReg + i++);
+}
+
+void
+AlphaProcess::setSyscallArg(ThreadContext *tc, int i, AlphaISA::IntReg val)
+{
+ assert(i < 6);
+ tc->setIntReg(FirstArgumentReg + i, val);
+}
+
+void
+AlphaProcess::setSyscallReturn(ThreadContext *tc, SyscallReturn sysret)
+{
+ // check for error condition. Alpha syscall convention is to
+ // indicate success/failure in reg a3 (r19) and put the
+ // return value itself in the standard return value reg (v0).
+ 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