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+/*
+ * Copyright (c) 2003-2005 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __SIM_SYSCALL_EMUL_HH__
+#define __SIM_SYSCALL_EMUL_HH__
+
+#define BSD_HOST (defined(__APPLE__) || defined(__OpenBSD__) || \
+ defined(__FreeBSD__))
+
+///
+/// @file syscall_emul.hh
+///
+/// This file defines objects used to emulate syscalls from the target
+/// application on the host machine.
+
+#include <errno.h>
+#include <string>
+#ifdef __CYGWIN32__
+#include <sys/fcntl.h> // for O_BINARY
+#endif
+#include <sys/uio.h>
+
+#include "arch/isa_traits.hh" // for Addr
+#include "base/chunk_generator.hh"
+#include "base/intmath.hh" // for RoundUp
+#include "base/misc.hh"
+#include "base/trace.hh"
+#include "cpu/base.hh"
+#include "cpu/exec_context.hh"
+#include "mem/translating_port.hh"
+#include "mem/page_table.hh"
+#include "sim/process.hh"
+
+///
+/// System call descriptor.
+///
+class SyscallDesc {
+
+ public:
+
+ /// Typedef for target syscall handler functions.
+ typedef SyscallReturn (*FuncPtr)(SyscallDesc *, int num,
+ Process *, ExecContext *);
+
+ const char *name; //!< Syscall name (e.g., "open").
+ FuncPtr funcPtr; //!< Pointer to emulation function.
+ int flags; //!< Flags (see Flags enum).
+
+ /// Flag values for controlling syscall behavior.
+ enum Flags {
+ /// Don't set return regs according to funcPtr return value.
+ /// Used for syscalls with non-standard return conventions
+ /// that explicitly set the ExecContext regs (e.g.,
+ /// sigreturn).
+ SuppressReturnValue = 1
+ };
+
+ /// Constructor.
+ SyscallDesc(const char *_name, FuncPtr _funcPtr, int _flags = 0)
+ : name(_name), funcPtr(_funcPtr), flags(_flags)
+ {
+ }
+
+ /// Emulate the syscall. Public interface for calling through funcPtr.
+ void doSyscall(int callnum, Process *proc, ExecContext *xc);
+};
+
+
+class BaseBufferArg {
+
+ public:
+
+ BaseBufferArg(Addr _addr, int _size) : addr(_addr), size(_size)
+ {
+ bufPtr = new uint8_t[size];
+ // clear out buffer: in case we only partially populate this,
+ // and then do a copyOut(), we want to make sure we don't
+ // introduce any random junk into the simulated address space
+ memset(bufPtr, 0, size);
+ }
+
+ virtual ~BaseBufferArg() { delete [] bufPtr; }
+
+ //
+ // copy data into simulator space (read from target memory)
+ //
+ virtual bool copyIn(TranslatingPort *memport)
+ {
+ memport->readBlob(addr, bufPtr, size);
+ return true; // no EFAULT detection for now
+ }
+
+ //
+ // copy data out of simulator space (write to target memory)
+ //
+ virtual bool copyOut(TranslatingPort *memport)
+ {
+ memport->writeBlob(addr, bufPtr, size);
+ return true; // no EFAULT detection for now
+ }
+
+ protected:
+ Addr addr;
+ int size;
+ uint8_t *bufPtr;
+};
+
+
+class BufferArg : public BaseBufferArg
+{
+ public:
+ BufferArg(Addr _addr, int _size) : BaseBufferArg(_addr, _size) { }
+ void *bufferPtr() { return bufPtr; }
+};
+
+template <class T>
+class TypedBufferArg : public BaseBufferArg
+{
+ public:
+ // user can optionally specify a specific number of bytes to
+ // allocate to deal with those structs that have variable-size
+ // arrays at the end
+ TypedBufferArg(Addr _addr, int _size = sizeof(T))
+ : BaseBufferArg(_addr, _size)
+ { }
+
+ // type case
+ operator T*() { return (T *)bufPtr; }
+
+ // dereference operators
+ T &operator*() { return *((T *)bufPtr); }
+ T* operator->() { return (T *)bufPtr; }
+ T &operator[](int i) { return ((T *)bufPtr)[i]; }
+};
+
+//////////////////////////////////////////////////////////////////////
+//
+// The following emulation functions are generic enough that they
+// don't need to be recompiled for different emulated OS's. They are
+// defined in sim/syscall_emul.cc.
+//
+//////////////////////////////////////////////////////////////////////
+
+
+/// Handler for unimplemented syscalls that we haven't thought about.
+SyscallReturn unimplementedFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Handler for unimplemented syscalls that we never intend to
+/// implement (signal handling, etc.) and should not affect the correct
+/// behavior of the program. Print a warning only if the appropriate
+/// trace flag is enabled. Return success to the target program.
+SyscallReturn ignoreFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target exit() handler: terminate simulation.
+SyscallReturn exitFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target getpagesize() handler.
+SyscallReturn getpagesizeFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target obreak() handler: set brk address.
+SyscallReturn obreakFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target close() handler.
+SyscallReturn closeFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target read() handler.
+SyscallReturn readFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target write() handler.
+SyscallReturn writeFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target lseek() handler.
+SyscallReturn lseekFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target munmap() handler.
+SyscallReturn munmapFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target gethostname() handler.
+SyscallReturn gethostnameFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target unlink() handler.
+SyscallReturn unlinkFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target rename() handler.
+SyscallReturn renameFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+
+/// Target truncate() handler.
+SyscallReturn truncateFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+
+/// Target ftruncate() handler.
+SyscallReturn ftruncateFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+
+/// Target chown() handler.
+SyscallReturn chownFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+
+/// Target fchown() handler.
+SyscallReturn fchownFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target fnctl() handler.
+SyscallReturn fcntlFunc(SyscallDesc *desc, int num,
+ Process *process, ExecContext *xc);
+
+/// Target setuid() handler.
+SyscallReturn setuidFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target getpid() handler.
+SyscallReturn getpidFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target getuid() handler.
+SyscallReturn getuidFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target getgid() handler.
+SyscallReturn getgidFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target getppid() handler.
+SyscallReturn getppidFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target geteuid() handler.
+SyscallReturn geteuidFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target getegid() handler.
+SyscallReturn getegidFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+
+
+/// Pseudo Funcs - These functions use a different return convension,
+/// returning a second value in a register other than the normal return register
+SyscallReturn pipePseudoFunc(SyscallDesc *desc, int num,
+ Process *process, ExecContext *xc);
+
+/// Target getpidPseudo() handler.
+SyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target getuidPseudo() handler.
+SyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target getgidPseudo() handler.
+SyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+
+/// This struct is used to build an target-OS-dependent table that
+/// maps the target's open() flags to the host open() flags.
+struct OpenFlagTransTable {
+ int tgtFlag; //!< Target system flag value.
+ int hostFlag; //!< Corresponding host system flag value.
+};
+
+
+
+/// A readable name for 1,000,000, for converting microseconds to seconds.
+const int one_million = 1000000;
+
+/// Approximate seconds since the epoch (1/1/1970). About a billion,
+/// by my reckoning. We want to keep this a constant (not use the
+/// real-world time) to keep simulations repeatable.
+const unsigned seconds_since_epoch = 1000000000;
+
+/// Helper function to convert current elapsed time to seconds and
+/// microseconds.
+template <class T1, class T2>
+void
+getElapsedTime(T1 &sec, T2 &usec)
+{
+ int elapsed_usecs = curTick / Clock::Int::us;
+ sec = elapsed_usecs / one_million;
+ usec = elapsed_usecs % one_million;
+}
+
+//////////////////////////////////////////////////////////////////////
+//
+// The following emulation functions are generic, but need to be
+// templated to account for differences in types, constants, etc.
+//
+//////////////////////////////////////////////////////////////////////
+
+/// Target ioctl() handler. For the most part, programs call ioctl()
+/// only to find out if their stdout is a tty, to determine whether to
+/// do line or block buffering.
+template <class OS>
+SyscallReturn
+ioctlFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ int fd = xc->getSyscallArg(0);
+ unsigned req = xc->getSyscallArg(1);
+
+ DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", fd, req);
+
+ if (fd < 0 || process->sim_fd(fd) < 0) {
+ // doesn't map to any simulator fd: not a valid target fd
+ return -EBADF;
+ }
+
+ switch (req) {
+ case OS::TIOCISATTY:
+ case OS::TIOCGETP:
+ case OS::TIOCSETP:
+ case OS::TIOCSETN:
+ case OS::TIOCSETC:
+ case OS::TIOCGETC:
+ case OS::TIOCGETS:
+ case OS::TIOCGETA:
+ return -ENOTTY;
+
+ default:
+ fatal("Unsupported ioctl call: ioctl(%d, 0x%x, ...) @ 0x%llx\n",
+ fd, req, xc->readPC());
+ }
+}
+
+/// Target open() handler.
+template <class OS>
+SyscallReturn
+openFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ std::string path;
+
+ if (!xc->getMemPort()->tryReadString(path, xc->getSyscallArg(0)))
+ return -EFAULT;
+
+ if (path == "/dev/sysdev0") {
+ // This is a memory-mapped high-resolution timer device on Alpha.
+ // We don't support it, so just punt.
+ warn("Ignoring open(%s, ...)\n", path);
+ return -ENOENT;
+ }
+
+ int tgtFlags = xc->getSyscallArg(1);
+ int mode = xc->getSyscallArg(2);
+ int hostFlags = 0;
+
+ // translate open flags
+ for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) {
+ if (tgtFlags & OS::openFlagTable[i].tgtFlag) {
+ tgtFlags &= ~OS::openFlagTable[i].tgtFlag;
+ hostFlags |= OS::openFlagTable[i].hostFlag;
+ }
+ }
+
+ // any target flags left?
+ if (tgtFlags != 0)
+ warn("Syscall: open: cannot decode flags 0x%x", tgtFlags);
+
+#ifdef __CYGWIN32__
+ hostFlags |= O_BINARY;
+#endif
+
+ DPRINTF(SyscallVerbose, "opening file %s\n", path.c_str());
+
+ // open the file
+ int fd = open(path.c_str(), hostFlags, mode);
+
+ return (fd == -1) ? -errno : process->alloc_fd(fd);
+}
+
+
+/// Target chmod() handler.
+template <class OS>
+SyscallReturn
+chmodFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ std::string path;
+
+ if (!xc->getMemPort()->tryReadString(path, xc->getSyscallArg(0)))
+ return -EFAULT;
+
+ uint32_t mode = xc->getSyscallArg(1);
+ mode_t hostMode = 0;
+
+ // XXX translate mode flags via OS::something???
+ hostMode = mode;
+
+ // do the chmod
+ int result = chmod(path.c_str(), hostMode);
+ if (result < 0)
+ return -errno;
+
+ return 0;
+}
+
+
+/// Target fchmod() handler.
+template <class OS>
+SyscallReturn
+fchmodFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ int fd = xc->getSyscallArg(0);
+ if (fd < 0 || process->sim_fd(fd) < 0) {
+ // doesn't map to any simulator fd: not a valid target fd
+ return -EBADF;
+ }
+
+ uint32_t mode = xc->getSyscallArg(1);
+ mode_t hostMode = 0;
+
+ // XXX translate mode flags via OS::someting???
+ hostMode = mode;
+
+ // do the fchmod
+ int result = fchmod(process->sim_fd(fd), hostMode);
+ if (result < 0)
+ return -errno;
+
+ return 0;
+}
+
+
+/// Target stat() handler.
+template <class OS>
+SyscallReturn
+statFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ std::string path;
+
+ if (!xc->getMemPort()->tryReadString(path, xc->getSyscallArg(0)))
+ return -EFAULT;
+
+ struct stat hostBuf;
+ int result = stat(path.c_str(), &hostBuf);
+
+ if (result < 0)
+ return -errno;
+
+ OS::copyOutStatBuf(xc->getMemPort(), xc->getSyscallArg(1), &hostBuf);
+
+ return 0;
+}
+
+
+/// Target fstat64() handler.
+template <class OS>
+SyscallReturn
+fstat64Func(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ int fd = xc->getSyscallArg(0);
+ if (fd < 0 || process->sim_fd(fd) < 0) {
+ // doesn't map to any simulator fd: not a valid target fd
+ return -EBADF;
+ }
+
+#if BSD_HOST
+ struct stat hostBuf;
+ int result = fstat(process->sim_fd(fd), &hostBuf);
+#else
+ struct stat64 hostBuf;
+ int result = fstat64(process->sim_fd(fd), &hostBuf);
+#endif
+
+ if (result < 0)
+ return -errno;
+
+ OS::copyOutStat64Buf(xc->getMemPort(), fd, xc->getSyscallArg(1), &hostBuf);
+
+ return 0;
+}
+
+
+/// Target lstat() handler.
+template <class OS>
+SyscallReturn
+lstatFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ std::string path;
+
+ if (!xc->getMemPort()->tryReadString(path, xc->getSyscallArg(0)))
+ return -EFAULT;
+
+ struct stat hostBuf;
+ int result = lstat(path.c_str(), &hostBuf);
+
+ if (result < 0)
+ return -errno;
+
+ OS::copyOutStatBuf(xc->getMemPort(), xc->getSyscallArg(1), &hostBuf);
+
+ return 0;
+}
+
+/// Target lstat64() handler.
+template <class OS>
+SyscallReturn
+lstat64Func(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ std::string path;
+
+ if (!xc->getMemPort()->tryReadString(path, xc->getSyscallArg(0)))
+ return -EFAULT;
+
+#if BSD_HOST
+ struct stat hostBuf;
+ int result = lstat(path.c_str(), &hostBuf);
+#else
+ struct stat64 hostBuf;
+ int result = lstat64(path.c_str(), &hostBuf);
+#endif
+
+ if (result < 0)
+ return -errno;
+
+ OS::copyOutStat64Buf(xc->getMemPort(), -1, xc->getSyscallArg(1), &hostBuf);
+
+ return 0;
+}
+
+/// Target fstat() handler.
+template <class OS>
+SyscallReturn
+fstatFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ int fd = process->sim_fd(xc->getSyscallArg(0));
+
+ DPRINTF(SyscallVerbose, "fstat(%d, ...)\n", fd);
+
+ if (fd < 0)
+ return -EBADF;
+
+ struct stat hostBuf;
+ int result = fstat(fd, &hostBuf);
+
+ if (result < 0)
+ return -errno;
+
+ OS::copyOutStatBuf(xc->getMemPort(), xc->getSyscallArg(1), &hostBuf);
+
+ return 0;
+}
+
+
+/// Target statfs() handler.
+template <class OS>
+SyscallReturn
+statfsFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ std::string path;
+
+ if (!xc->getMemPort()->tryReadString(path, xc->getSyscallArg(0)))
+ return -EFAULT;
+
+ struct statfs hostBuf;
+ int result = statfs(path.c_str(), &hostBuf);
+
+ if (result < 0)
+ return -errno;
+
+ OS::copyOutStatfsBuf(xc->getMemPort(), xc->getSyscallArg(1), &hostBuf);
+
+ return 0;
+}
+
+
+/// Target fstatfs() handler.
+template <class OS>
+SyscallReturn
+fstatfsFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ int fd = process->sim_fd(xc->getSyscallArg(0));
+
+ if (fd < 0)
+ return -EBADF;
+
+ struct statfs hostBuf;
+ int result = fstatfs(fd, &hostBuf);
+
+ if (result < 0)
+ return -errno;
+
+ OS::copyOutStatfsBuf(xc->getMemPort(), xc->getSyscallArg(1), &hostBuf);
+
+ return 0;
+}
+
+
+/// Target writev() handler.
+template <class OS>
+SyscallReturn
+writevFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ int fd = xc->getSyscallArg(0);
+ if (fd < 0 || process->sim_fd(fd) < 0) {
+ // doesn't map to any simulator fd: not a valid target fd
+ return -EBADF;
+ }
+
+ TranslatingPort *p = xc->getMemPort();
+ uint64_t tiov_base = xc->getSyscallArg(1);
+ size_t count = xc->getSyscallArg(2);
+ struct iovec hiov[count];
+ for (int i = 0; i < count; ++i)
+ {
+ typename OS::tgt_iovec tiov;
+
+ p->readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec),
+ (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec));
+ hiov[i].iov_len = gtoh(tiov.iov_len);
+ hiov[i].iov_base = new char [hiov[i].iov_len];
+ p->readBlob(gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base,
+ hiov[i].iov_len);
+ }
+
+ int result = writev(process->sim_fd(fd), hiov, count);
+
+ for (int i = 0; i < count; ++i)
+ {
+ delete [] (char *)hiov[i].iov_base;
+ }
+
+ if (result < 0)
+ return -errno;
+
+ return 0;
+}
+
+
+/// Target mmap() handler.
+///
+/// We don't really handle mmap(). If the target is mmaping an
+/// anonymous region or /dev/zero, we can get away with doing basically
+/// nothing (since memory is initialized to zero and the simulator
+/// doesn't really check addresses anyway). Always print a warning,
+/// since this could be seriously broken if we're not mapping
+/// /dev/zero.
+//
+/// Someday we should explicitly check for /dev/zero in open, flag the
+/// file descriptor, and fail (or implement!) a non-anonymous mmap to
+/// anything else.
+template <class OS>
+SyscallReturn
+mmapFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
+{
+ Addr start = xc->getSyscallArg(0);
+ uint64_t length = xc->getSyscallArg(1);
+ // int prot = xc->getSyscallArg(2);
+ int flags = xc->getSyscallArg(3);
+ // int fd = p->sim_fd(xc->getSyscallArg(4));
+ // int offset = xc->getSyscallArg(5);
+
+ if ((start % TheISA::VMPageSize) != 0 ||
+ (length % TheISA::VMPageSize) != 0) {
+ warn("mmap failing: arguments not page-aligned: "
+ "start 0x%x length 0x%x",
+ start, length);
+ return -EINVAL;
+ }
+
+ if (start != 0) {
+ warn("mmap: ignoring suggested map address 0x%x, using 0x%x",
+ start, p->mmap_end);
+ }
+
+ // pick next address from our "mmap region"
+ start = p->mmap_end;
+ p->pTable->allocate(start, length);
+ p->mmap_end += length;
+
+ if (!(flags & OS::TGT_MAP_ANONYMOUS)) {
+ warn("allowing mmap of file @ fd %d. "
+ "This will break if not /dev/zero.", xc->getSyscallArg(4));
+ }
+
+ return start;
+}
+
+/// Target getrlimit() handler.
+template <class OS>
+SyscallReturn
+getrlimitFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ unsigned resource = xc->getSyscallArg(0);
+ TypedBufferArg<typename OS::rlimit> rlp(xc->getSyscallArg(1));
+
+ switch (resource) {
+ case OS::TGT_RLIMIT_STACK:
+ // max stack size in bytes: make up a number (2MB for now)
+ rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024;
+ rlp->rlim_cur = htog(rlp->rlim_cur);
+ rlp->rlim_max = htog(rlp->rlim_max);
+ break;
+
+ default:
+ std::cerr << "getrlimitFunc: unimplemented resource " << resource
+ << std::endl;
+ abort();
+ break;
+ }
+
+ rlp.copyOut(xc->getMemPort());
+ return 0;
+}
+
+/// Target gettimeofday() handler.
+template <class OS>
+SyscallReturn
+gettimeofdayFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ TypedBufferArg<typename OS::timeval> tp(xc->getSyscallArg(0));
+
+ getElapsedTime(tp->tv_sec, tp->tv_usec);
+ tp->tv_sec += seconds_since_epoch;
+ tp->tv_sec = htog(tp->tv_sec);
+ tp->tv_usec = htog(tp->tv_usec);
+
+ tp.copyOut(xc->getMemPort());
+
+ return 0;
+}
+
+
+/// Target utimes() handler.
+template <class OS>
+SyscallReturn
+utimesFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ std::string path;
+
+ if (!xc->getMemPort()->tryReadString(path, xc->getSyscallArg(0)))
+ return -EFAULT;
+
+ TypedBufferArg<typename OS::timeval [2]> tp(xc->getSyscallArg(1));
+ tp.copyIn(xc->getMemPort());
+
+ struct timeval hostTimeval[2];
+ for (int i = 0; i < 2; ++i)
+ {
+ hostTimeval[i].tv_sec = gtoh((*tp)[i].tv_sec);
+ hostTimeval[i].tv_usec = gtoh((*tp)[i].tv_usec);
+ }
+ int result = utimes(path.c_str(), hostTimeval);
+
+ if (result < 0)
+ return -errno;
+
+ return 0;
+}
+/// Target getrusage() function.
+template <class OS>
+SyscallReturn
+getrusageFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ int who = xc->getSyscallArg(0); // THREAD, SELF, or CHILDREN
+ TypedBufferArg<typename OS::rusage> rup(xc->getSyscallArg(1));
+
+ if (who != OS::TGT_RUSAGE_SELF) {
+ // don't really handle THREAD or CHILDREN, but just warn and
+ // plow ahead
+ warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.",
+ who);
+ }
+
+ getElapsedTime(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec);
+ rup->ru_utime.tv_sec = htog(rup->ru_utime.tv_sec);
+ rup->ru_utime.tv_usec = htog(rup->ru_utime.tv_usec);
+
+ rup->ru_stime.tv_sec = 0;
+ rup->ru_stime.tv_usec = 0;
+ rup->ru_maxrss = 0;
+ rup->ru_ixrss = 0;
+ rup->ru_idrss = 0;
+ rup->ru_isrss = 0;
+ rup->ru_minflt = 0;
+ rup->ru_majflt = 0;
+ rup->ru_nswap = 0;
+ rup->ru_inblock = 0;
+ rup->ru_oublock = 0;
+ rup->ru_msgsnd = 0;
+ rup->ru_msgrcv = 0;
+ rup->ru_nsignals = 0;
+ rup->ru_nvcsw = 0;
+ rup->ru_nivcsw = 0;
+
+ rup.copyOut(xc->getMemPort());
+
+ return 0;
+}
+
+
+
+
+#endif // __SIM_SYSCALL_EMUL_HH__
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-02 07:25:11 +0000