/*
* Copyright (c) 2004-2005 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 __LINUX_HH__
#define __LINUX_HH__
#include "config/full_system.hh"
#if FULL_SYSTEM
class Linux {};
#else //!FULL_SYSTEM
#include <dirent.h>
#include <errno.h>
#include <fcntl.h> // for host open() flags
#include <string.h> // for memset()
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "sim/syscall_emul.hh"
#include "arch/isa_traits.hh"
class TranslatingPort;
///
/// This class encapsulates the types, structures, constants,
/// functions, and syscall-number mappings specific to the Alpha Linux
/// syscall interface.
///
class Linux {
public:
//@{
/// Basic Linux types.
typedef uint64_t size_t;
typedef uint64_t off_t;
typedef int64_t time_t;
typedef uint32_t uid_t;
typedef uint32_t gid_t;
//@}
typedef TheISA::OSFlags OSFlags;
#if BSD_HOST
typedef struct stat hst_stat;
typedef struct stat hst_stat64;
#else
typedef struct stat hst_stat ;
typedef struct stat64 hst_stat64;
#endif
/// This table maps the target open() flags to the corresponding
/// host open() flags.
static OpenFlagTransTable openFlagTable[];
/// Number of entries in openFlagTable[].
static const int NUM_OPEN_FLAGS;
/// Stat buffer. Note that we can't call it 'stat' since that
/// gets #defined to something else on some systems.
struct tgt_stat {
uint32_t st_dev; //!< device
uint32_t st_ino; //!< inode
uint32_t st_mode; //!< mode
uint32_t st_nlink; //!< link count
uint32_t st_uid; //!< owner's user ID
uint32_t st_gid; //!< owner's group ID
uint32_t st_rdev; //!< device number
int32_t _pad1; //!< for alignment
int64_t st_size; //!< file size in bytes
uint64_t st_atimeX; //!< time of last access
uint64_t st_mtimeX; //!< time of last modification
uint64_t st_ctimeX; //!< time of last status change
uint32_t st_blksize; //!< optimal I/O block size
int32_t st_blocks; //!< number of blocks allocated
uint32_t st_flags; //!< flags
uint32_t st_gen; //!< unknown
};
// same for stat64
struct tgt_stat64 {
uint64_t st_dev;
uint64_t st_ino;
uint64_t st_rdev;
int64_t st_size;
uint64_t st_blocks;
uint32_t st_mode;
uint32_t st_uid;
uint32_t st_gid;
uint32_t st_blksize;
uint32_t st_nlink;
uint32_t __pad0;
uint64_t tgt_st_atime;
uint64_t st_atime_nsec;
uint64_t tgt_st_mtime;
uint64_t st_mtime_nsec;
uint64_t tgt_st_ctime;
uint64_t st_ctime_nsec;
int64_t ___unused[3];
};
/// Length of strings in struct utsname (plus 1 for null char).
static const int _SYS_NMLN = 65;
/// Interface struct for uname().
struct utsname {
char sysname[_SYS_NMLN]; //!< System name.
char nodename[_SYS_NMLN]; //!< Node name.
char release[_SYS_NMLN]; //!< OS release.
char version[_SYS_NMLN]; //!< OS version.
char machine[_SYS_NMLN]; //!< Machine type.
};
/// Resource enumeration for getrlimit().
enum rlimit_resources {
TGT_RLIMIT_CPU = 0,
TGT_RLIMIT_FSIZE = 1,
TGT_RLIMIT_DATA = 2,
TGT_RLIMIT_STACK = 3,
TGT_RLIMIT_CORE = 4,
TGT_RLIMIT_RSS = 5,
TGT_RLIMIT_NOFILE = 6,
TGT_RLIMIT_AS = 7,
TGT_RLIMIT_VMEM = 7,
TGT_RLIMIT_NPROC = 8,
TGT_RLIMIT_MEMLOCK = 9,
TGT_RLIMIT_LOCKS = 10
};
/// Limit struct for getrlimit/setrlimit.
struct rlimit {
uint64_t rlim_cur; //!< soft limit
uint64_t rlim_max; //!< hard limit
};
/// For gettimeofday().
struct timeval {
int64_t tv_sec; //!< seconds
int64_t tv_usec; //!< microseconds
};
// For writev/readv
struct tgt_iovec {
uint64_t iov_base; // void *
uint64_t iov_len;
};
/// For getrusage().
struct rusage {
struct timeval ru_utime; //!< user time used
struct timeval ru_stime; //!< system time used
int64_t ru_maxrss; //!< max rss
int64_t ru_ixrss; //!< integral shared memory size
int64_t ru_idrss; //!< integral unshared data "
int64_t ru_isrss; //!< integral unshared stack "
int64_t ru_minflt; //!< page reclaims - total vmfaults
int64_t ru_majflt; //!< page faults
int64_t ru_nswap; //!< swaps
int64_t ru_inblock; //!< block input operations
int64_t ru_oublock; //!< block output operations
int64_t ru_msgsnd; //!< messages sent
int64_t ru_msgrcv; //!< messages received
int64_t ru_nsignals; //!< signals received
int64_t ru_nvcsw; //!< voluntary context switches
int64_t ru_nivcsw; //!< involuntary "
};
/// Helper function to convert a host stat buffer to a target stat
/// buffer. Also copies the target buffer out to the simulated
/// memory space. Used by stat(), fstat(), and lstat().
#if !BSD_HOST
static void
copyOutStatBuf(TranslatingPort *mem, Addr addr, hst_stat *host)
{
using namespace TheISA;
TypedBufferArg<Linux::tgt_stat> tgt(addr);
tgt->st_dev = htog(host->st_dev);
tgt->st_ino = htog(host->st_ino);
tgt->st_mode = htog(host->st_mode);
tgt->st_nlink = htog(host->st_nlink);
tgt->st_uid = htog(host->st_uid);
tgt->st_gid = htog(host->st_gid);
tgt->st_rdev = htog(host->st_rdev);
tgt->st_size = htog(host->st_size);
tgt->st_atimeX = htog(host->st_atime);
tgt->st_mtimeX = htog(host->st_mtime);
tgt->st_ctimeX = htog(host->st_ctime);
tgt->st_blksize = htog(host->st_blksize);
tgt->st_blocks = htog(host->st_blocks);
tgt.copyOut(mem);
}
#else
// Third version for bsd systems which no longer have any support for
// the old stat() call and stat() is actually a stat64()
static void
copyOutStatBuf(TranslatingPort *mem, Addr addr, hst_stat64 *host)
{
using namespace TheISA;
TypedBufferArg<Linux::tgt_stat> tgt(addr);
tgt->st_dev = htog(host->st_dev);
tgt->st_ino = htog(host->st_ino);
tgt->st_mode = htog(host->st_mode);
tgt->st_nlink = htog(host->st_nlink);
tgt->st_uid = htog(host->st_uid);
tgt->st_gid = htog(host->st_gid);
tgt->st_rdev = htog(host->st_rdev);
tgt->st_size = htog(host->st_size);
tgt->st_atimeX = htog(host->st_atime);
tgt->st_mtimeX = htog(host->st_mtime);
tgt->st_ctimeX = htog(host->st_ctime);
tgt->st_blksize = htog(host->st_blksize);
tgt->st_blocks = htog(host->st_blocks);
tgt.copyOut(mem);
}
#endif
// Same for stat64
static void
copyOutStat64Buf(TranslatingPort *mem, int fd, Addr addr, hst_stat64 *host)
{
using namespace TheISA;
TypedBufferArg<Linux::tgt_stat64> tgt(addr);
// fd == 1 checks are because libc does some checks
// that the stdout is interactive vs. a file
// this makes it work on non-linux systems
if (fd == 1)
tgt->st_dev = htog((uint64_t)0xA);
else
tgt->st_dev = htog((uint64_t)host->st_dev);
// XXX What about STAT64_HAS_BROKEN_ST_INO ???
tgt->st_ino = htog((uint64_t)host->st_ino);
if (fd == 1)
tgt->st_rdev = htog((uint64_t)0x880d);
else
tgt->st_rdev = htog((uint64_t)host->st_rdev);
tgt->st_size = htog((int64_t)host->st_size);
tgt->st_blocks = htog((uint64_t)host->st_blocks);
if (fd == 1)
tgt->st_mode = htog((uint32_t)0x2190);
else
tgt->st_mode = htog((uint32_t)host->st_mode);
tgt->st_uid = htog((uint32_t)host->st_uid);
tgt->st_gid = htog((uint32_t)host->st_gid);
tgt->st_blksize = htog((uint32_t)host->st_blksize);
tgt->st_nlink = htog((uint32_t)host->st_nlink);
tgt->tgt_st_atime = htog((uint64_t)host->st_atime);
tgt->tgt_st_mtime = htog((uint64_t)host->st_mtime);
tgt->tgt_st_ctime = htog((uint64_t)host->st_ctime);
#if defined(STAT_HAVE_NSEC)
tgt->st_atime_nsec = htog(host->st_atime_nsec);
tgt->st_mtime_nsec = htog(host->st_mtime_nsec);
tgt->st_ctime_nsec = htog(host->st_ctime_nsec);
#else
tgt->st_atime_nsec = 0;
tgt->st_mtime_nsec = 0;
tgt->st_ctime_nsec = 0;
#endif
tgt.copyOut(mem);
}
}; // class Linux
#endif // FULL_SYSTEM
#endif // __LINUX_HH__