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/*
* Copyright (c) 2004-2009 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.
*
* Authors: Ali Saidi
*/
#ifndef __LINUX_HH__
#define __LINUX_HH__
#include "base/types.hh"
#include <string>
#include "kern/operatingsystem.hh"
#include "sim/process.hh"
class ThreadContext;
///
/// This class encapsulates the types, structures, constants,
/// functions, and syscall-number mappings specific to the Alpha Linux
/// syscall interface.
///
class Linux : public OperatingSystem
{
public:
//@{
/// Basic Linux types.
typedef uint64_t size_t;
typedef uint64_t off_t;
typedef int64_t time_t;
typedef int64_t clock_t;
typedef uint32_t uid_t;
typedef uint32_t gid_t;
//@}
/// Stat buffer. Note that we can't call it 'stat' since that
/// gets #defined to something else on some systems. This type
/// can be specialized by architecture specific "Linux" classes
typedef struct {
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
} tgt_stat;
// same for stat64
typedef struct {
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 st_atimeX;
uint64_t st_atime_nsec;
uint64_t st_mtimeX;
uint64_t st_mtime_nsec;
uint64_t st_ctimeX;
uint64_t st_ctime_nsec;
int64_t ___unused[3];
} tgt_stat64;
/// 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.
};
/// 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 clock_gettime().
struct timespec {
time_t tv_sec; //!< seconds
int64_t tv_nsec; //!< nanoseconds
};
/// Clock ticks per second, for times().
static const int M5_SC_CLK_TCK = 100;
/// For times().
struct tms {
int64_t tms_utime; //!< user time
int64_t tms_stime; //!< system time
int64_t tms_cutime; //!< user time of children
int64_t tms_cstime; //!< system time of children
};
// For writev/readv
struct tgt_iovec {
uint64_t iov_base; // void *
uint64_t iov_len;
};
// For select().
// linux-3.14-src/include/uapi/linux/posix_types.h
struct fd_set{
#ifndef LINUX__FD_SETSIZE
#define LINUX__FD_SETSIZE 1024
unsigned long fds_bits[LINUX__FD_SETSIZE / (8 * sizeof(long))];
#endif
};
//@{
/// ioctl() command codes.
static const unsigned TGT_TCGETS = 0x5401;
static const unsigned TGT_TCGETA = 0x5405;
static const unsigned TGT_TCSETAW = 0x5407;
static const unsigned TGT_FIONREAD = 0x541B;
//@}
/// Return true for the ioctl codes for which we return ENOTTY
/// *without* printing a warning, since we know that ENOTTY is the
/// correct thing to return (and not just a sign that we don't
/// recognize the ioctl code.
static bool
isTtyReq(unsigned req)
{
switch (req) {
case TGT_FIONREAD:
case TGT_TCSETAW:
case TGT_TCGETS:
case TGT_TCGETA:
return true;
default:
return false;
}
}
/// Resource constants for getrlimit().
static const unsigned TGT_RLIMIT_CPU = 0;
static const unsigned TGT_RLIMIT_FSIZE = 1;
static const unsigned TGT_RLIMIT_DATA = 2;
static const unsigned TGT_RLIMIT_STACK = 3;
static const unsigned TGT_RLIMIT_CORE = 4;
static const unsigned TGT_RLIMIT_RSS = 5;
static const unsigned TGT_RLIMIT_NPROC = 6;
static const unsigned TGT_RLIMIT_NOFILE = 7;
static const unsigned TGT_RLIMIT_MEMLOCK = 8;
static const unsigned TGT_RLIMIT_AS = 9;
static const unsigned TGT_RLIMIT_LOCKS = 10;
static const unsigned TGT_RLIMIT_SIGPENDING = 11;
static const unsigned TGT_RLIMIT_MSGQUEUE = 12;
static const unsigned TGT_RLIMIT_NICE = 13;
static const unsigned TGT_RLIMIT_RTPRIO = 14;
static const unsigned TGT_RLIMIT_RTTIME = 15;
static const unsigned TGT_RLIM_NLIMITS = 16;
/// For getrusage().
static const int TGT_RUSAGE_SELF = 0;
static const int TGT_RUSAGE_CHILDREN = -1;
static const int TGT_RUSAGE_BOTH = -2;
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 "
};
static int openSpecialFile(std::string path, Process *process,
ThreadContext *tc);
static std::string procMeminfo(Process *process, ThreadContext *tc);
static std::string etcPasswd(Process *process, ThreadContext *tc);
static std::string cpuOnline(Process *process, ThreadContext *tc);
// For futex system call
static const unsigned TGT_FUTEX_WAIT = 0;
static const unsigned TGT_FUTEX_WAKE = 1;
static const unsigned TGT_FUTEX_REQUEUE = 3;
static const unsigned TGT_FUTEX_CMP_REQUEUE = 4;
static const unsigned TGT_FUTEX_WAKE_OP = 5;
static const unsigned TGT_FUTEX_WAIT_BITSET = 9;
static const unsigned TGT_FUTEX_WAKE_BITSET = 10;
static const unsigned TGT_EAGAIN = 11;
static const unsigned TGT_EWOULDBLOCK = TGT_EAGAIN;
static const unsigned TGT_FUTEX_PRIVATE_FLAG = 128;
static const unsigned TGT_FUTEX_CLOCK_REALTIME_FLAG = 256;
// op field of futex_wake_op operation
static const unsigned TGT_FUTEX_OP_SET = 0; // uaddr2 = oparg;
static const unsigned TGT_FUTEX_OP_ADD = 1; // uaddr2 += oparg;
static const unsigned TGT_FUTEX_OP_OR = 2; // uaddr2 |= oparg;
static const unsigned TGT_FUTEX_OP_ANDN = 3; // uaddr2 &= ~oparg;
static const unsigned TGT_FUTEX_OP_XOR = 4; // uaddr2 ^= oparg;
// Use (1 << oparg) as operand
static const unsigned TGT_FUTEX_OP_ARG_SHIFT = 8;
// cmp field of futex_wake_op operation
static const unsigned TGT_FUTEX_OP_CMP_EQ = 0;
static const unsigned TGT_FUTEX_OP_CMP_NE = 1;
static const unsigned TGT_FUTEX_OP_CMP_LT = 2;
static const unsigned TGT_FUTEX_OP_CMP_LE = 3;
static const unsigned TGT_FUTEX_OP_CMP_GT = 4;
static const unsigned TGT_FUTEX_OP_CMP_GE = 5;
// for *at syscalls
static const int TGT_AT_FDCWD = -100;
// for MREMAP
static const unsigned TGT_MREMAP_MAYMOVE = 0x1;
static const unsigned TGT_MREMAP_FIXED = 0x2;
static const unsigned TGT_CLONE_VM = 0x00000100;
static const unsigned TGT_CLONE_FS = 0x00000200;
static const unsigned TGT_CLONE_FILES = 0x00000400;
static const unsigned TGT_CLONE_SIGHAND = 0x00000800;
static const unsigned TGT_CLONE_PTRACE = 0x00002000;
static const unsigned TGT_CLONE_VFORK = 0x00004000;
static const unsigned TGT_CLONE_PARENT = 0x00008000;
static const unsigned TGT_CLONE_THREAD = 0x00010000;
static const unsigned TGT_CLONE_NEWNS = 0x00020000;
static const unsigned TGT_CLONE_SYSVSEM = 0x00040000;
static const unsigned TGT_CLONE_SETTLS = 0x00080000;
static const unsigned TGT_CLONE_PARENT_SETTID = 0x00100000;
static const unsigned TGT_CLONE_CHILD_CLEARTID = 0x00200000;
static const unsigned TGT_CLONE_DETACHED = 0x00400000;
static const unsigned TGT_CLONE_UNTRACED = 0x00800000;
static const unsigned TGT_CLONE_CHILD_SETTID = 0x01000000;
static const unsigned TGT_CLONE_NEWUTS = 0x04000000;
static const unsigned TGT_CLONE_NEWIPC = 0x08000000;
static const unsigned TGT_CLONE_NEWUSER = 0x10000000;
static const unsigned TGT_CLONE_NEWPID = 0x20000000;
static const unsigned TGT_CLONE_NEWNET = 0x40000000;
static const unsigned TGT_CLONE_IO = 0x80000000;
// linux-3.13-src/include/uapi/linux/wait.h
static const unsigned TGT_WNOHANG = 0x00000001;
static const unsigned TGT_WUNTRACED = 0x00000002;
static const unsigned TGT_WSTOPPED = TGT_WUNTRACED;
static const unsigned TGT_WEXITED = 0x00000004;
static const unsigned TGT_WCONTINUED = 0x00000008;
static const unsigned TGT_WNOWAIT = 0x01000000;
}; // class Linux
#endif // __LINUX_HH__