arch-riscv: Enable support for riscv 32-bit in SE mode.

This patch splits up the riscv SE mode support for 32 and 64-bit.
A future patch will add support for decoding rv32 instructions.

Change-Id: Ia79ae19f753caf94dc7e5830a6630efb94b419d7
Signed-off-by: Austin Harris <austinharris@utexas.edu>
Reviewed-on: https://gem5-review.googlesource.com/c/15355
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Alec Roelke <alec.roelke@gmail.com>
Maintainer: Alec Roelke <alec.roelke@gmail.com>

7 files changed, 681 insertions, 80 deletions

diff --git a/src/arch/riscv/linux/linux.cc b/src/arch/riscv/linux/linux.cc
index 39fce22f4..65b430692 100644
--- a/src/arch/riscv/linux/linux.cc
+++ b/src/arch/riscv/linux/linux.cc
@@ -33,5 +33,9 @@
 #include <fcntl.h>
 #include <sys/mman.h>
 
-#define TARGET RiscvLinux
+#define TARGET RiscvLinux64
+#include "kern/linux/flag_tables.hh"
+
+#undef TARGET
+#define TARGET RiscvLinux32
 #include "kern/linux/flag_tables.hh"
diff --git a/src/arch/riscv/linux/linux.hh b/src/arch/riscv/linux/linux.hh
index 2dac1fe32..23b4fd562 100644
--- a/src/arch/riscv/linux/linux.hh
+++ b/src/arch/riscv/linux/linux.hh
@@ -34,7 +34,7 @@
 #include "arch/riscv/utility.hh"
 #include "kern/linux/linux.hh"
 
-class RiscvLinux : public Linux
+class RiscvLinux64 : public Linux
 {
   public:
     static const int TGT_SIGHUP         =  1;
@@ -201,4 +201,174 @@ class RiscvLinux : public Linux
     }
 };
 
+class RiscvLinux32 : public Linux
+{
+  public:
+    static const int TGT_SIGHUP         =  1;
+    static const int TGT_SIGINT         =  2;
+    static const int TGT_SIGQUIT        =  3;
+    static const int TGT_SIGILL         =  4;
+    static const int TGT_SIGTRAP        =  5;
+    static const int TGT_SIGABRT        =  6;
+    static const int TGT_SIGIOT         =  6;
+    static const int TGT_SIGEMT         =  7;
+    static const int TGT_SIGFPE         =  8;
+    static const int TGT_SIGKILL        =  9;
+    static const int TGT_SIGBUS         = 10;
+    static const int TGT_SIGSEGV        = 11;
+    static const int TGT_SIGSYS         = 12;
+    static const int TGT_SIGPIPE        = 13;
+    static const int TGT_SIGALRM        = 14;
+    static const int TGT_SIGTERM        = 15;
+    static const int TGT_SIGURG         = 16;
+    static const int TGT_SIGSTOP        = 17;
+    static const int TGT_SIGTSTP        = 18;
+    static const int TGT_SIGCONT        = 19;
+    static const int TGT_SIGCHLD        = 20;
+    static const int TGT_SIGCLD         = 20;
+    static const int TGT_SIGTTIN        = 21;
+    static const int TGT_SIGTTOU        = 22;
+    static const int TGT_SIGPOLL        = 23;
+    static const int TGT_SIGIO          = 23;
+    static const int TGT_SIGXCPU        = 24;
+    static const int TGT_SIGXFSZ        = 25;
+    static const int TGT_SIGVTALRM      = 26;
+    static const int TGT_SIGPROF        = 27;
+    static const int TGT_SIGWINCH       = 28;
+    static const int TGT_SIGLOST        = 29;
+    static const int TGT_SIGPWR         = 29;
+    static const int TGT_SIGUSR1        = 30;
+    static const int TGT_SIGUSR2        = 31;
+
+    /// This table maps the target open() flags to the corresponding
+    /// host open() flags.
+    static SyscallFlagTransTable openFlagTable[];
+
+    /// Number of entries in openFlagTable[].
+    static const int NUM_OPEN_FLAGS;
+
+    //@{
+    /// open(2) flag values.
+    // The following values match newlib 3.0.0.
+    // Note that glibc has different values.
+    static const int TGT_O_RDONLY       = 0x000000; //!< O_RDONLY
+    static const int TGT_O_WRONLY       = 0x000001; //!< O_WRONLY
+    static const int TGT_O_RDWR         = 0x000002; //!< O_RDWR
+    static const int TGT_O_CREAT        = 0x000200; //!< O_CREAT
+    static const int TGT_O_EXCL         = 0x000800; //!< O_EXCL
+    static const int TGT_O_NOCTTY       = 0x008000; //!< O_NOCTTY
+    static const int TGT_O_TRUNC        = 0x000400; //!< O_TRUNC
+    static const int TGT_O_APPEND       = 0x000008; //!< O_APPEND
+    static const int TGT_O_NONBLOCK     = 0x004000; //!< O_NONBLOCK
+    static const int TGT_O_SYNC         = 0x002000; //!< O_SYNC
+    static const int TGT_FSYNC          = 0x002000; //!< FSYNC
+    static const int TGT_FASYNC         = 0x000040; //!< FASYNC
+    // The following are not present in riscv32-unknown-elf <fcntl.h>
+    static const int TGT_O_DSYNC        = 0x010000; //!< O_DSYNC
+    static const int TGT_O_CLOEXEC      = 0x040000; //!< O_CLOEXEC
+    static const int TGT_O_NOINHERIT    = 0x040000; //!< O_NOINHERIT
+    static const int TGT_O_DIRECT       = 0x080000; //!< O_DIRECT
+    static const int TGT_O_NOFOLLOW     = 0x100000; //!< O_NOFOLLOW
+    static const int TGT_O_DIRECTORY    = 0x200000; //!< O_DIRECTORY
+    // The following are not defined by riscv32-unknown-elf
+    static const int TGT_O_LARGEFILE    = 0x020000; //!< O_LARGEFILE
+    static const int TGT_O_NOATIME      = 0x800000; //!< O_NOATIME
+    static const int TGT_O_PATH         = 0x400000; //!< O_PATH
+    //@}
+
+    // Only defined in riscv-unknown-elf for proxy kernel and not linux kernel
+    static const unsigned TGT_MAP_SHARED        = 0x0001;
+    static const unsigned TGT_MAP_PRIVATE       = 0x0002;
+    static const unsigned TGT_MAP_FIXED         = 0x0010;
+    static const unsigned TGT_MAP_ANONYMOUS     = 0x0020;
+    static const unsigned TGT_MAP_POPULATE      = 0x1000;
+    static const unsigned TGT_MREMAP_FIXED      = 0x0020;
+
+    static const unsigned NUM_MMAP_FLAGS;
+
+    // Newlib 3.0.0 defaults to 64-bits for time_t.
+    // Currently time_t in glibc for riscv32 is 32-bits, but will be changed.
+    typedef int64_t time_t;
+
+    /// Limit struct for getrlimit/setrlimit.
+    struct rlimit {
+        uint32_t  rlim_cur;     //!< soft limit
+        uint32_t  rlim_max;     //!< hard limit
+    };
+
+    struct timespec {
+        time_t tv_sec;
+        int32_t tv_nsec;
+    };
+
+    typedef struct {
+        int32_t val[2];
+    } tgt_fsid_t;
+
+    typedef struct {
+        uint64_t st_dev;
+        uint64_t st_ino;
+        uint32_t st_mode;
+        uint32_t st_nlink;
+        uint32_t st_uid;
+        uint32_t st_gid;
+        uint64_t st_rdev;
+        uint64_t __pad1;
+        int64_t st_size;
+        int32_t st_blksize;
+        int32_t __pad2;
+        int64_t st_blocks;
+        time_t st_atimeX;
+        int32_t st_atime_nsec;
+        time_t st_mtimeX;
+        int32_t st_mtime_nsec;
+        time_t st_ctimeX;
+        int32_t st_ctime_nsec;
+        int32_t __unused4;
+        int32_t __unused5;
+    } tgt_stat;
+
+    typedef struct {
+        uint32_t f_type;
+        uint32_t f_bsize;
+        uint32_t f_blocks;
+        uint32_t f_bfree;
+        uint32_t f_bavail;
+        uint32_t f_files;
+        uint32_t f_ffree;
+        tgt_fsid_t f_fsid;
+        uint32_t f_namelen;
+        uint32_t f_frsize;
+        uint32_t f_flags;
+        uint32_t f_spare[4];
+    } tgt_statfs;
+
+    typedef struct {
+        int32_t uptime;
+        uint32_t loads[3];
+        uint32_t totalram;
+        uint32_t freeram;
+        uint32_t sharedram;
+        uint32_t bufferram;
+        uint32_t totalswap;
+        uint32_t freeswap;
+        uint16_t procs;
+        uint16_t pad;
+        uint32_t totalhigh;
+        uint32_t freehigh;
+        uint32_t mem_unit;
+    } tgt_sysinfo;
+
+    static void
+    archClone(uint64_t flags,
+              Process *pp, Process *cp,
+              ThreadContext *ptc, ThreadContext *ctc,
+              uint64_t stack, uint64_t tls)
+    {
+        RiscvISA::copyRegs(ptc, ctc);
+        if (stack)
+            ctc->setIntReg(RiscvISA::StackPointerReg, stack);
+    }
+};
+
 #endif
diff --git a/src/arch/riscv/linux/process.cc b/src/arch/riscv/linux/process.cc
index 6806079a3..03104b232 100644
--- a/src/arch/riscv/linux/process.cc
+++ b/src/arch/riscv/linux/process.cc
@@ -53,7 +53,7 @@ using namespace RiscvISA;
 
 /// Target uname() handler.
 static SyscallReturn
-unameFunc(SyscallDesc *desc, int callnum, Process *process,
+unameFunc64(SyscallDesc *desc, int callnum, Process *process,
           ThreadContext *tc)
 {
     int index = 0;
@@ -63,13 +63,31 @@ unameFunc(SyscallDesc *desc, int callnum, Process *process,
     strcpy(name->nodename,"sim.gem5.org");
     strcpy(name->release, "3.0.0");
     strcpy(name->version, "#1 Mon Aug 18 11:32:15 EDT 2003");
-    strcpy(name->machine, "riscv");
+    strcpy(name->machine, "riscv64");
 
     name.copyOut(tc->getMemProxy());
     return 0;
 }
 
-std::map<int, SyscallDesc> RiscvLinuxProcess::syscallDescs = {
+/// Target uname() handler.
+static SyscallReturn
+unameFunc32(SyscallDesc *desc, int callnum, Process *process,
+            ThreadContext *tc)
+{
+    int index = 0;
+    TypedBufferArg<Linux::utsname> name(process->getSyscallArg(tc, index));
+
+    strcpy(name->sysname, "Linux");
+    strcpy(name->nodename,"sim.gem5.org");
+    strcpy(name->release, "3.0.0");
+    strcpy(name->version, "#1 Mon Aug 18 11:32:15 EDT 2003");
+    strcpy(name->machine, "riscv32");
+
+    name.copyOut(tc->getMemProxy());
+    return 0;
+}
+
+std::map<int, SyscallDesc> RiscvLinuxProcess64::syscallDescs = {
     {0,    SyscallDesc("io_setup")},
     {1,    SyscallDesc("io_destroy")},
     {2,    SyscallDesc("io_submit")},
@@ -99,45 +117,45 @@ std::map<int, SyscallDesc> RiscvLinuxProcess::syscallDescs = {
     {26,   SyscallDesc("inotify_init1")},
     {27,   SyscallDesc("inotify_add_watch")},
     {28,   SyscallDesc("inotify_rm_watch")},
-    {29,   SyscallDesc("ioctl", ioctlFunc<RiscvLinux>)},
+    {29,   SyscallDesc("ioctl", ioctlFunc<RiscvLinux64>)},
     {30,   SyscallDesc("ioprio_get")},
     {31,   SyscallDesc("ioprio_set")},
     {32,   SyscallDesc("flock")},
     {33,   SyscallDesc("mknodat")},
     {34,   SyscallDesc("mkdirat")},
-    {35,   SyscallDesc("unlinkat", unlinkatFunc<RiscvLinux>)},
+    {35,   SyscallDesc("unlinkat", unlinkatFunc<RiscvLinux64>)},
     {36,   SyscallDesc("symlinkat")},
     {37,   SyscallDesc("linkat")},
-    {38,   SyscallDesc("renameat", renameatFunc<RiscvLinux>)},
+    {38,   SyscallDesc("renameat", renameatFunc<RiscvLinux64>)},
     {39,   SyscallDesc("umount2")},
     {40,   SyscallDesc("mount")},
     {41,   SyscallDesc("pivot_root")},
     {42,   SyscallDesc("nfsservctl")},
-    {43,   SyscallDesc("statfs", statfsFunc<RiscvLinux>)},
-    {44,   SyscallDesc("fstatfs", fstatfsFunc<RiscvLinux>)},
+    {43,   SyscallDesc("statfs", statfsFunc<RiscvLinux64>)},
+    {44,   SyscallDesc("fstatfs", fstatfsFunc<RiscvLinux64>)},
     {45,   SyscallDesc("truncate", truncateFunc)},
     {46,   SyscallDesc("ftruncate", ftruncate64Func)},
     {47,   SyscallDesc("fallocate", fallocateFunc)},
-    {48,   SyscallDesc("faccessat", faccessatFunc<RiscvLinux>)},
+    {48,   SyscallDesc("faccessat", faccessatFunc<RiscvLinux64>)},
     {49,   SyscallDesc("chdir")},
     {50,   SyscallDesc("fchdir")},
     {51,   SyscallDesc("chroot")},
-    {52,   SyscallDesc("fchmod", fchmodFunc<RiscvLinux>)},
+    {52,   SyscallDesc("fchmod", fchmodFunc<RiscvLinux64>)},
     {53,   SyscallDesc("fchmodat")},
     {54,   SyscallDesc("fchownat")},
     {55,   SyscallDesc("fchown", fchownFunc)},
-    {56,   SyscallDesc("openat", openatFunc<RiscvLinux>)},
+    {56,   SyscallDesc("openat", openatFunc<RiscvLinux64>)},
     {57,   SyscallDesc("close", closeFunc)},
     {58,   SyscallDesc("vhangup")},
     {59,   SyscallDesc("pipe2")},
     {60,   SyscallDesc("quotactl")},
     {61,   SyscallDesc("getdents64")},
     {62,   SyscallDesc("lseek", lseekFunc)},
-    {63,   SyscallDesc("read", readFunc<RiscvLinux>)},
-    {64,   SyscallDesc("write", writeFunc<RiscvLinux>)},
-    {66,   SyscallDesc("writev", writevFunc<RiscvLinux>)},
+    {63,   SyscallDesc("read", readFunc<RiscvLinux64>)},
+    {64,   SyscallDesc("write", writeFunc<RiscvLinux64>)},
+    {66,   SyscallDesc("writev", writevFunc<RiscvLinux64>)},
     {67,   SyscallDesc("pread64")},
-    {68,   SyscallDesc("pwrite64", pwrite64Func<RiscvLinux>)},
+    {68,   SyscallDesc("pwrite64", pwrite64Func<RiscvLinux64>)},
     {69,   SyscallDesc("preadv")},
     {70,   SyscallDesc("pwritev")},
     {71,   SyscallDesc("sendfile")},
@@ -147,9 +165,9 @@ std::map<int, SyscallDesc> RiscvLinuxProcess::syscallDescs = {
     {75,   SyscallDesc("vmsplice")},
     {76,   SyscallDesc("splice")},
     {77,   SyscallDesc("tee")},
-    {78,   SyscallDesc("readlinkat", readlinkatFunc<RiscvLinux>)},
-    {79,   SyscallDesc("fstatat", fstatat64Func<RiscvLinux>)},
-    {80,   SyscallDesc("fstat", fstat64Func<RiscvLinux>)},
+    {78,   SyscallDesc("readlinkat", readlinkatFunc<RiscvLinux64>)},
+    {79,   SyscallDesc("fstatat", fstatat64Func<RiscvLinux64>)},
+    {80,   SyscallDesc("fstat", fstat64Func<RiscvLinux64>)},
     {81,   SyscallDesc("sync")},
     {82,   SyscallDesc("fsync")},
     {83,   SyscallDesc("fdatasync")},
@@ -167,7 +185,7 @@ std::map<int, SyscallDesc> RiscvLinuxProcess::syscallDescs = {
     {95,   SyscallDesc("waitid")},
     {96,   SyscallDesc("set_tid_address", setTidAddressFunc)},
     {97,   SyscallDesc("unshare")},
-    {98,   SyscallDesc("futex", futexFunc<RiscvLinux>)},
+    {98,   SyscallDesc("futex", futexFunc<RiscvLinux64>)},
     {99,   SyscallDesc("set_robust_list", ignoreFunc, SyscallDesc::WarnOnce)},
     {100,  SyscallDesc("get_robust_list", ignoreFunc, SyscallDesc::WarnOnce)},
     {101,  SyscallDesc("nanosleep")},
@@ -182,8 +200,8 @@ std::map<int, SyscallDesc> RiscvLinuxProcess::syscallDescs = {
     {110,  SyscallDesc("timer_settime")},
     {111,  SyscallDesc("timer_delete")},
     {112,  SyscallDesc("clock_settime")},
-    {113,  SyscallDesc("clock_gettime", clock_gettimeFunc<RiscvLinux>)},
-    {114,  SyscallDesc("clock_getres", clock_getresFunc<RiscvLinux>)},
+    {113,  SyscallDesc("clock_gettime", clock_gettimeFunc<RiscvLinux64>)},
+    {114,  SyscallDesc("clock_getres", clock_getresFunc<RiscvLinux64>)},
     {115,  SyscallDesc("clock_nanosleep")},
     {116,  SyscallDesc("syslog")},
     {117,  SyscallDesc("ptrace")},
@@ -200,7 +218,7 @@ std::map<int, SyscallDesc> RiscvLinuxProcess::syscallDescs = {
     {128,  SyscallDesc("restart_syscall")},
     {129,  SyscallDesc("kill")},
     {130,  SyscallDesc("tkill")},
-    {131,  SyscallDesc("tgkill", tgkillFunc<RiscvLinux>)},
+    {131,  SyscallDesc("tgkill", tgkillFunc<RiscvLinux64>)},
     {132,  SyscallDesc("sigaltstack")},
     {133,  SyscallDesc("rt_sigsuspend", ignoreFunc, SyscallDesc::WarnOnce)},
     {134,  SyscallDesc("rt_sigaction", ignoreFunc, SyscallDesc::WarnOnce)},
@@ -222,23 +240,23 @@ std::map<int, SyscallDesc> RiscvLinuxProcess::syscallDescs = {
     {150,  SyscallDesc("getresgid")},
     {151,  SyscallDesc("setfsuid")},
     {152,  SyscallDesc("setfsgid")},
-    {153,  SyscallDesc("times", timesFunc<RiscvLinux>)},
+    {153,  SyscallDesc("times", timesFunc<RiscvLinux64>)},
     {154,  SyscallDesc("setpgid", setpgidFunc)},
     {155,  SyscallDesc("getpgid")},
     {156,  SyscallDesc("getsid")},
     {157,  SyscallDesc("setsid")},
     {158,  SyscallDesc("getgroups")},
     {159,  SyscallDesc("setgroups")},
-    {160,  SyscallDesc("uname", unameFunc)},
+    {160,  SyscallDesc("uname", unameFunc64)},
     {161,  SyscallDesc("sethostname")},
     {162,  SyscallDesc("setdomainname")},
-    {163,  SyscallDesc("getrlimit", getrlimitFunc<RiscvLinux>)},
+    {163,  SyscallDesc("getrlimit", getrlimitFunc<RiscvLinux64>)},
     {164,  SyscallDesc("setrlimit", ignoreFunc)},
-    {165,  SyscallDesc("getrusage", getrusageFunc<RiscvLinux>)},
+    {165,  SyscallDesc("getrusage", getrusageFunc<RiscvLinux64>)},
     {166,  SyscallDesc("umask", umaskFunc)},
     {167,  SyscallDesc("prctl")},
     {168,  SyscallDesc("getcpu")},
-    {169,  SyscallDesc("gettimeofday", gettimeofdayFunc<RiscvLinux>)},
+    {169,  SyscallDesc("gettimeofday", gettimeofdayFunc<RiscvLinux64>)},
     {170,  SyscallDesc("settimeofday")},
     {171,  SyscallDesc("adjtimex")},
     {172,  SyscallDesc("getpid", getpidFunc)},
@@ -248,7 +266,7 @@ std::map<int, SyscallDesc> RiscvLinuxProcess::syscallDescs = {
     {176,  SyscallDesc("getgid", getgidFunc)},
     {177,  SyscallDesc("getegid", getegidFunc)},
     {178,  SyscallDesc("gettid", gettidFunc)},
-    {179,  SyscallDesc("sysinfo", sysinfoFunc<RiscvLinux>)},
+    {179,  SyscallDesc("sysinfo", sysinfoFunc<RiscvLinux64>)},
     {180,  SyscallDesc("mq_open")},
     {181,  SyscallDesc("mq_unlink")},
     {182,  SyscallDesc("mq_timedsend")},
@@ -285,13 +303,13 @@ std::map<int, SyscallDesc> RiscvLinuxProcess::syscallDescs = {
     {213,  SyscallDesc("readahead")},
     {214,  SyscallDesc("brk", brkFunc)},
     {215,  SyscallDesc("munmap", munmapFunc)},
-    {216,  SyscallDesc("mremap", mremapFunc<RiscvLinux>)},
+    {216,  SyscallDesc("mremap", mremapFunc<RiscvLinux64>)},
     {217,  SyscallDesc("add_key")},
     {218,  SyscallDesc("request_key")},
     {219,  SyscallDesc("keyctl")},
-    {220,  SyscallDesc("clone", cloneFunc<RiscvLinux>)},
-    {221,  SyscallDesc("execve", execveFunc<RiscvLinux>)},
-    {222,  SyscallDesc("mmap", mmapFunc<RiscvLinux>)},
+    {220,  SyscallDesc("clone", cloneFunc<RiscvLinux64>)},
+    {221,  SyscallDesc("execve", execveFunc<RiscvLinux64>)},
+    {222,  SyscallDesc("mmap", mmapFunc<RiscvLinux64>)},
     {223,  SyscallDesc("fadvise64")},
     {224,  SyscallDesc("swapon")},
     {225,  SyscallDesc("swapoff")},
@@ -314,7 +332,7 @@ std::map<int, SyscallDesc> RiscvLinuxProcess::syscallDescs = {
     {242,  SyscallDesc("accept4")},
     {243,  SyscallDesc("recvmmsg")},
     {260,  SyscallDesc("wait4")},
-    {261,  SyscallDesc("prlimit64", prlimitFunc<RiscvLinux>)},
+    {261,  SyscallDesc("prlimit64", prlimitFunc<RiscvLinux64>)},
     {262,  SyscallDesc("fanotify_init")},
     {263,  SyscallDesc("fanotify_mark")},
     {264,  SyscallDesc("name_to_handle_at")},
@@ -341,11 +359,11 @@ std::map<int, SyscallDesc> RiscvLinuxProcess::syscallDescs = {
     {285,  SyscallDesc("copy_file_range")},
     {286,  SyscallDesc("preadv2")},
     {287,  SyscallDesc("pwritev2")},
-    {1024, SyscallDesc("open", openFunc<RiscvLinux>)},
+    {1024, SyscallDesc("open", openFunc<RiscvLinux64>)},
     {1025, SyscallDesc("link")},
     {1026, SyscallDesc("unlink", unlinkFunc)},
     {1027, SyscallDesc("mknod")},
-    {1028, SyscallDesc("chmod", chmodFunc<RiscvLinux>)},
+    {1028, SyscallDesc("chmod", chmodFunc<RiscvLinux64>)},
     {1029, SyscallDesc("chown", chownFunc)},
     {1030, SyscallDesc("mkdir", mkdirFunc)},
     {1031, SyscallDesc("rmdir")},
@@ -354,9 +372,9 @@ std::map<int, SyscallDesc> RiscvLinuxProcess::syscallDescs = {
     {1034, SyscallDesc("rename", renameFunc)},
     {1035, SyscallDesc("readlink", readlinkFunc)},
     {1036, SyscallDesc("symlink")},
-    {1037, SyscallDesc("utimes", utimesFunc<RiscvLinux>)},
-    {1038, SyscallDesc("stat", stat64Func<RiscvLinux>)},
-    {1039, SyscallDesc("lstat", lstat64Func<RiscvLinux>)},
+    {1037, SyscallDesc("utimes", utimesFunc<RiscvLinux64>)},
+    {1038, SyscallDesc("stat", stat64Func<RiscvLinux64>)},
+    {1039, SyscallDesc("lstat", lstat64Func<RiscvLinux64>)},
     {1040, SyscallDesc("pipe", pipeFunc)},
     {1041, SyscallDesc("dup2", dup2Func)},
     {1042, SyscallDesc("epoll_create")},
@@ -366,20 +384,351 @@ std::map<int, SyscallDesc> RiscvLinuxProcess::syscallDescs = {
     {1046, SyscallDesc("sendfile")},
     {1047, SyscallDesc("ftruncate", ftruncate64Func)},
     {1048, SyscallDesc("truncate", truncate64Func)},
-    {1049, SyscallDesc("stat", stat64Func<RiscvLinux>)},
-    {1050, SyscallDesc("lstat", lstat64Func<RiscvLinux>)},
-    {1051, SyscallDesc("fstat", fstat64Func<RiscvLinux>)},
+    {1049, SyscallDesc("stat", stat64Func<RiscvLinux64>)},
+    {1050, SyscallDesc("lstat", lstat64Func<RiscvLinux64>)},
+    {1051, SyscallDesc("fstat", fstat64Func<RiscvLinux64>)},
     {1052, SyscallDesc("fcntl", fcntl64Func)},
     {1053, SyscallDesc("fadvise64")},
     {1054, SyscallDesc("newfstatat")},
-    {1055, SyscallDesc("fstatfs", fstatfsFunc<RiscvLinux>)},
-    {1056, SyscallDesc("statfs", statfsFunc<RiscvLinux>)},
+    {1055, SyscallDesc("fstatfs", fstatfsFunc<RiscvLinux64>)},
+    {1056, SyscallDesc("statfs", statfsFunc<RiscvLinux64>)},
+    {1057, SyscallDesc("lseek", lseekFunc)},
+    {1058, SyscallDesc("mmap", mmapFunc<RiscvLinux64>)},
+    {1059, SyscallDesc("alarm")},
+    {1060, SyscallDesc("getpgrp")},
+    {1061, SyscallDesc("pause")},
+    {1062, SyscallDesc("time", timeFunc<RiscvLinux64>)},
+    {1063, SyscallDesc("utime")},
+    {1064, SyscallDesc("creat")},
+    {1065, SyscallDesc("getdents")},
+    {1066, SyscallDesc("futimesat")},
+    {1067, SyscallDesc("select")},
+    {1068, SyscallDesc("poll")},
+    {1069, SyscallDesc("epoll_wait")},
+    {1070, SyscallDesc("ustat")},
+    {1071, SyscallDesc("vfork")},
+    {1072, SyscallDesc("oldwait4")},
+    {1073, SyscallDesc("recv")},
+    {1074, SyscallDesc("send")},
+    {1075, SyscallDesc("bdflush")},
+    {1076, SyscallDesc("umount")},
+    {1077, SyscallDesc("uselib")},
+    {1078, SyscallDesc("sysctl")},
+    {1079, SyscallDesc("fork")},
+    {2011, SyscallDesc("getmainvars")}
+};
+
+std::map<int, SyscallDesc> RiscvLinuxProcess32::syscallDescs = {
+    {0,    SyscallDesc("io_setup")},
+    {1,    SyscallDesc("io_destroy")},
+    {2,    SyscallDesc("io_submit")},
+    {3,    SyscallDesc("io_cancel")},
+    {4,    SyscallDesc("io_getevents")},
+    {5,    SyscallDesc("setxattr")},
+    {6,    SyscallDesc("lsetxattr")},
+    {7,    SyscallDesc("fsetxattr")},
+    {8,    SyscallDesc("getxattr")},
+    {9,    SyscallDesc("lgetxattr")},
+    {10,   SyscallDesc("fgetxattr")},
+    {11,   SyscallDesc("listxattr")},
+    {12,   SyscallDesc("llistxattr")},
+    {13,   SyscallDesc("flistxattr")},
+    {14,   SyscallDesc("removexattr")},
+    {15,   SyscallDesc("lremovexattr")},
+    {16,   SyscallDesc("fremovexattr")},
+    {17,   SyscallDesc("getcwd", getcwdFunc)},
+    {18,   SyscallDesc("lookup_dcookie")},
+    {19,   SyscallDesc("eventfd2")},
+    {20,   SyscallDesc("epoll_create1")},
+    {21,   SyscallDesc("epoll_ctl")},
+    {22,   SyscallDesc("epoll_pwait")},
+    {23,   SyscallDesc("dup", dupFunc)},
+    {24,   SyscallDesc("dup3")},
+    {25,   SyscallDesc("fcntl", fcntlFunc)},
+    {26,   SyscallDesc("inotify_init1")},
+    {27,   SyscallDesc("inotify_add_watch")},
+    {28,   SyscallDesc("inotify_rm_watch")},
+    {29,   SyscallDesc("ioctl", ioctlFunc<RiscvLinux32>)},
+    {30,   SyscallDesc("ioprio_get")},
+    {31,   SyscallDesc("ioprio_set")},
+    {32,   SyscallDesc("flock")},
+    {33,   SyscallDesc("mknodat")},
+    {34,   SyscallDesc("mkdirat")},
+    {35,   SyscallDesc("unlinkat", unlinkatFunc<RiscvLinux32>)},
+    {36,   SyscallDesc("symlinkat")},
+    {37,   SyscallDesc("linkat")},
+    {38,   SyscallDesc("renameat", renameatFunc<RiscvLinux32>)},
+    {39,   SyscallDesc("umount2")},
+    {40,   SyscallDesc("mount")},
+    {41,   SyscallDesc("pivot_root")},
+    {42,   SyscallDesc("nfsservctl")},
+    {43,   SyscallDesc("statfs", statfsFunc<RiscvLinux32>)},
+    {44,   SyscallDesc("fstatfs", fstatfsFunc<RiscvLinux32>)},
+    {45,   SyscallDesc("truncate", truncateFunc)},
+    {46,   SyscallDesc("ftruncate", ftruncateFunc)},
+    {47,   SyscallDesc("fallocate", fallocateFunc)},
+    {48,   SyscallDesc("faccessat", faccessatFunc<RiscvLinux32>)},
+    {49,   SyscallDesc("chdir")},
+    {50,   SyscallDesc("fchdir")},
+    {51,   SyscallDesc("chroot")},
+    {52,   SyscallDesc("fchmod", fchmodFunc<RiscvLinux32>)},
+    {53,   SyscallDesc("fchmodat")},
+    {54,   SyscallDesc("fchownat")},
+    {55,   SyscallDesc("fchown", fchownFunc)},
+    {56,   SyscallDesc("openat", openatFunc<RiscvLinux32>)},
+    {57,   SyscallDesc("close", closeFunc)},
+    {58,   SyscallDesc("vhangup")},
+    {59,   SyscallDesc("pipe2")},
+    {60,   SyscallDesc("quotactl")},
+    {61,   SyscallDesc("getdents64")},
+    {62,   SyscallDesc("lseek", lseekFunc)},
+    {63,   SyscallDesc("read", readFunc<RiscvLinux32>)},
+    {64,   SyscallDesc("write", writeFunc<RiscvLinux32>)},
+    {66,   SyscallDesc("writev", writevFunc<RiscvLinux32>)},
+    {67,   SyscallDesc("pread64")},
+    {68,   SyscallDesc("pwrite64", pwrite64Func<RiscvLinux32>)},
+    {69,   SyscallDesc("preadv")},
+    {70,   SyscallDesc("pwritev")},
+    {71,   SyscallDesc("sendfile")},
+    {72,   SyscallDesc("pselect6")},
+    {73,   SyscallDesc("ppoll")},
+    {74,   SyscallDesc("signalfd64")},
+    {75,   SyscallDesc("vmsplice")},
+    {76,   SyscallDesc("splice")},
+    {77,   SyscallDesc("tee")},
+    {78,   SyscallDesc("readlinkat", readlinkatFunc<RiscvLinux32>)},
+    {79,   SyscallDesc("fstatat")},
+    {80,   SyscallDesc("fstat", fstatFunc<RiscvLinux32>)},
+    {81,   SyscallDesc("sync")},
+    {82,   SyscallDesc("fsync")},
+    {83,   SyscallDesc("fdatasync")},
+    {84,   SyscallDesc("sync_file_range2")},
+    {85,   SyscallDesc("timerfd_create")},
+    {86,   SyscallDesc("timerfd_settime")},
+    {87,   SyscallDesc("timerfd_gettime")},
+    {88,   SyscallDesc("utimensat")},
+    {89,   SyscallDesc("acct")},
+    {90,   SyscallDesc("capget")},
+    {91,   SyscallDesc("capset")},
+    {92,   SyscallDesc("personality")},
+    {93,   SyscallDesc("exit", exitFunc)},
+    {94,   SyscallDesc("exit_group", exitGroupFunc)},
+    {95,   SyscallDesc("waitid")},
+    {96,   SyscallDesc("set_tid_address", setTidAddressFunc)},
+    {97,   SyscallDesc("unshare")},
+    {98,   SyscallDesc("futex", futexFunc<RiscvLinux32>)},
+    {99,   SyscallDesc("set_robust_list", ignoreFunc, SyscallDesc::WarnOnce)},
+    {100,  SyscallDesc("get_robust_list", ignoreFunc, SyscallDesc::WarnOnce)},
+    {101,  SyscallDesc("nanosleep")},
+    {102,  SyscallDesc("getitimer")},
+    {103,  SyscallDesc("setitimer")},
+    {104,  SyscallDesc("kexec_load")},
+    {105,  SyscallDesc("init_module")},
+    {106,  SyscallDesc("delete_module")},
+    {107,  SyscallDesc("timer_create")},
+    {108,  SyscallDesc("timer_gettime")},
+    {109,  SyscallDesc("timer_getoverrun")},
+    {110,  SyscallDesc("timer_settime")},
+    {111,  SyscallDesc("timer_delete")},
+    {112,  SyscallDesc("clock_settime")},
+    {113,  SyscallDesc("clock_gettime", clock_gettimeFunc<RiscvLinux32>)},
+    {114,  SyscallDesc("clock_getres", clock_getresFunc<RiscvLinux32>)},
+    {115,  SyscallDesc("clock_nanosleep")},
+    {116,  SyscallDesc("syslog")},
+    {117,  SyscallDesc("ptrace")},
+    {118,  SyscallDesc("sched_setparam")},
+    {119,  SyscallDesc("sched_setscheduler")},
+    {120,  SyscallDesc("sched_getscheduler")},
+    {121,  SyscallDesc("sched_getparam")},
+    {122,  SyscallDesc("sched_setaffinity")},
+    {123,  SyscallDesc("sched_getaffinity")},
+    {124,  SyscallDesc("sched_yield", ignoreFunc, SyscallDesc::WarnOnce)},
+    {125,  SyscallDesc("sched_get_priority_max")},
+    {126,  SyscallDesc("sched_get_priority_min")},
+    {127,  SyscallDesc("scheD_rr_get_interval")},
+    {128,  SyscallDesc("restart_syscall")},
+    {129,  SyscallDesc("kill")},
+    {130,  SyscallDesc("tkill")},
+    {131,  SyscallDesc("tgkill", tgkillFunc<RiscvLinux32>)},
+    {132,  SyscallDesc("sigaltstack")},
+    {133,  SyscallDesc("rt_sigsuspend", ignoreFunc, SyscallDesc::WarnOnce)},
+    {134,  SyscallDesc("rt_sigaction", ignoreFunc, SyscallDesc::WarnOnce)},
+    {135,  SyscallDesc("rt_sigprocmask", ignoreFunc, SyscallDesc::WarnOnce)},
+    {136,  SyscallDesc("rt_sigpending", ignoreFunc, SyscallDesc::WarnOnce)},
+    {137,  SyscallDesc("rt_sigtimedwait", ignoreFunc,SyscallDesc::WarnOnce)},
+    {138,  SyscallDesc("rt_sigqueueinfo", ignoreFunc,SyscallDesc::WarnOnce)},
+    {139,  SyscallDesc("rt_sigreturn", ignoreFunc, SyscallDesc::WarnOnce)},
+    {140,  SyscallDesc("setpriority")},
+    {141,  SyscallDesc("getpriority")},
+    {142,  SyscallDesc("reboot")},
+    {143,  SyscallDesc("setregid")},
+    {144,  SyscallDesc("setgid")},
+    {145,  SyscallDesc("setreuid")},
+    {146,  SyscallDesc("setuid", setuidFunc)},
+    {147,  SyscallDesc("setresuid")},
+    {148,  SyscallDesc("getresuid")},
+    {149,  SyscallDesc("getresgid")},
+    {150,  SyscallDesc("getresgid")},
+    {151,  SyscallDesc("setfsuid")},
+    {152,  SyscallDesc("setfsgid")},
+    {153,  SyscallDesc("times", timesFunc<RiscvLinux32>)},
+    {154,  SyscallDesc("setpgid", setpgidFunc)},
+    {155,  SyscallDesc("getpgid")},
+    {156,  SyscallDesc("getsid")},
+    {157,  SyscallDesc("setsid")},
+    {158,  SyscallDesc("getgroups")},
+    {159,  SyscallDesc("setgroups")},
+    {160,  SyscallDesc("uname", unameFunc32)},
+    {161,  SyscallDesc("sethostname")},
+    {162,  SyscallDesc("setdomainname")},
+    {163,  SyscallDesc("getrlimit", getrlimitFunc<RiscvLinux32>)},
+    {164,  SyscallDesc("setrlimit", ignoreFunc)},
+    {165,  SyscallDesc("getrusage", getrusageFunc<RiscvLinux32>)},
+    {166,  SyscallDesc("umask", umaskFunc)},
+    {167,  SyscallDesc("prctl")},
+    {168,  SyscallDesc("getcpu")},
+    {169,  SyscallDesc("gettimeofday", gettimeofdayFunc<RiscvLinux32>)},
+    {170,  SyscallDesc("settimeofday")},
+    {171,  SyscallDesc("adjtimex")},
+    {172,  SyscallDesc("getpid", getpidFunc)},
+    {173,  SyscallDesc("getppid", getppidFunc)},
+    {174,  SyscallDesc("getuid", getuidFunc)},
+    {175,  SyscallDesc("geteuid", geteuidFunc)},
+    {176,  SyscallDesc("getgid", getgidFunc)},
+    {177,  SyscallDesc("getegid", getegidFunc)},
+    {178,  SyscallDesc("gettid", gettidFunc)},
+    {179,  SyscallDesc("sysinfo", sysinfoFunc<RiscvLinux32>)},
+    {180,  SyscallDesc("mq_open")},
+    {181,  SyscallDesc("mq_unlink")},
+    {182,  SyscallDesc("mq_timedsend")},
+    {183,  SyscallDesc("mq_timedrecieve")},
+    {184,  SyscallDesc("mq_notify")},
+    {185,  SyscallDesc("mq_getsetattr")},
+    {186,  SyscallDesc("msgget")},
+    {187,  SyscallDesc("msgctl")},
+    {188,  SyscallDesc("msgrcv")},
+    {189,  SyscallDesc("msgsnd")},
+    {190,  SyscallDesc("semget")},
+    {191,  SyscallDesc("semctl")},
+    {192,  SyscallDesc("semtimedop")},
+    {193,  SyscallDesc("semop")},
+    {194,  SyscallDesc("shmget")},
+    {195,  SyscallDesc("shmctl")},
+    {196,  SyscallDesc("shmat")},
+    {197,  SyscallDesc("shmdt")},
+    {198,  SyscallDesc("socket")},
+    {199,  SyscallDesc("socketpair")},
+    {200,  SyscallDesc("bind")},
+    {201,  SyscallDesc("listen")},
+    {202,  SyscallDesc("accept")},
+    {203,  SyscallDesc("connect")},
+    {204,  SyscallDesc("getsockname")},
+    {205,  SyscallDesc("getpeername")},
+    {206,  SyscallDesc("sendo")},
+    {207,  SyscallDesc("recvfrom")},
+    {208,  SyscallDesc("setsockopt")},
+    {209,  SyscallDesc("getsockopt")},
+    {210,  SyscallDesc("shutdown")},
+    {211,  SyscallDesc("sendmsg")},
+    {212,  SyscallDesc("recvmsg")},
+    {213,  SyscallDesc("readahead")},
+    {214,  SyscallDesc("brk", brkFunc)},
+    {215,  SyscallDesc("munmap", munmapFunc)},
+    {216,  SyscallDesc("mremap", mremapFunc<RiscvLinux32>)},
+    {217,  SyscallDesc("add_key")},
+    {218,  SyscallDesc("request_key")},
+    {219,  SyscallDesc("keyctl")},
+    {220,  SyscallDesc("clone", cloneFunc<RiscvLinux32>)},
+    {221,  SyscallDesc("execve", execveFunc<RiscvLinux32>)},
+    {222,  SyscallDesc("mmap", mmapFunc<RiscvLinux32>)},
+    {223,  SyscallDesc("fadvise64")},
+    {224,  SyscallDesc("swapon")},
+    {225,  SyscallDesc("swapoff")},
+    {226,  SyscallDesc("mprotect", ignoreFunc)},
+    {227,  SyscallDesc("msync", ignoreFunc)},
+    {228,  SyscallDesc("mlock", ignoreFunc)},
+    {229,  SyscallDesc("munlock", ignoreFunc)},
+    {230,  SyscallDesc("mlockall", ignoreFunc)},
+    {231,  SyscallDesc("munlockall", ignoreFunc)},
+    {232,  SyscallDesc("mincore", ignoreFunc)},
+    {233,  SyscallDesc("madvise", ignoreFunc)},
+    {234,  SyscallDesc("remap_file_pages")},
+    {235,  SyscallDesc("mbind", ignoreFunc)},
+    {236,  SyscallDesc("get_mempolicy")},
+    {237,  SyscallDesc("set_mempolicy")},
+    {238,  SyscallDesc("migrate_pages")},
+    {239,  SyscallDesc("move_pages")},
+    {240,  SyscallDesc("tgsigqueueinfo")},
+    {241,  SyscallDesc("perf_event_open")},
+    {242,  SyscallDesc("accept4")},
+    {243,  SyscallDesc("recvmmsg")},
+    {260,  SyscallDesc("wait4")},
+    {261,  SyscallDesc("prlimit64", prlimitFunc<RiscvLinux32>)},
+    {262,  SyscallDesc("fanotify_init")},
+    {263,  SyscallDesc("fanotify_mark")},
+    {264,  SyscallDesc("name_to_handle_at")},
+    {265,  SyscallDesc("open_by_handle_at")},
+    {266,  SyscallDesc("clock_adjtime")},
+    {267,  SyscallDesc("syncfs")},
+    {268,  SyscallDesc("setns")},
+    {269,  SyscallDesc("sendmmsg")},
+    {270,  SyscallDesc("process_vm_ready")},
+    {271,  SyscallDesc("process_vm_writev")},
+    {272,  SyscallDesc("kcmp")},
+    {273,  SyscallDesc("finit_module")},
+    {274,  SyscallDesc("sched_setattr")},
+    {275,  SyscallDesc("sched_getattr")},
+    {276,  SyscallDesc("renameat2")},
+    {277,  SyscallDesc("seccomp")},
+    {278,  SyscallDesc("getrandom")},
+    {279,  SyscallDesc("memfd_create")},
+    {280,  SyscallDesc("bpf")},
+    {281,  SyscallDesc("execveat")},
+    {282,  SyscallDesc("userfaultid")},
+    {283,  SyscallDesc("membarrier")},
+    {284,  SyscallDesc("mlock2")},
+    {285,  SyscallDesc("copy_file_range")},
+    {286,  SyscallDesc("preadv2")},
+    {287,  SyscallDesc("pwritev2")},
+    {1024, SyscallDesc("open", openFunc<RiscvLinux32>)},
+    {1025, SyscallDesc("link")},
+    {1026, SyscallDesc("unlink", unlinkFunc)},
+    {1027, SyscallDesc("mknod")},
+    {1028, SyscallDesc("chmod", chmodFunc<RiscvLinux32>)},
+    {1029, SyscallDesc("chown", chownFunc)},
+    {1030, SyscallDesc("mkdir", mkdirFunc)},
+    {1031, SyscallDesc("rmdir")},
+    {1032, SyscallDesc("lchown")},
+    {1033, SyscallDesc("access", accessFunc)},
+    {1034, SyscallDesc("rename", renameFunc)},
+    {1035, SyscallDesc("readlink", readlinkFunc)},
+    {1036, SyscallDesc("symlink")},
+    {1037, SyscallDesc("utimes", utimesFunc<RiscvLinux32>)},
+    {1038, SyscallDesc("stat", statFunc<RiscvLinux32>)},
+    {1039, SyscallDesc("lstat", lstatFunc<RiscvLinux32>)},
+    {1040, SyscallDesc("pipe", pipeFunc)},
+    {1041, SyscallDesc("dup2", dup2Func)},
+    {1042, SyscallDesc("epoll_create")},
+    {1043, SyscallDesc("inotifiy_init")},
+    {1044, SyscallDesc("eventfd")},
+    {1045, SyscallDesc("signalfd")},
+    {1046, SyscallDesc("sendfile")},
+    {1047, SyscallDesc("ftruncate", ftruncateFunc)},
+    {1048, SyscallDesc("truncate", truncateFunc)},
+    {1049, SyscallDesc("stat", statFunc<RiscvLinux32>)},
+    {1050, SyscallDesc("lstat", lstatFunc<RiscvLinux32>)},
+    {1051, SyscallDesc("fstat", fstatFunc<RiscvLinux32>)},
+    {1052, SyscallDesc("fcntl", fcntlFunc)},
+    {1053, SyscallDesc("fadvise64")},
+    {1054, SyscallDesc("newfstatat")},
+    {1055, SyscallDesc("fstatfs", fstatfsFunc<RiscvLinux32>)},
+    {1056, SyscallDesc("statfs", statfsFunc<RiscvLinux32>)},
     {1057, SyscallDesc("lseek", lseekFunc)},
-    {1058, SyscallDesc("mmap", mmapFunc<RiscvLinux>)},
+    {1058, SyscallDesc("mmap", mmapFunc<RiscvLinux32>)},
     {1059, SyscallDesc("alarm")},
     {1060, SyscallDesc("getpgrp")},
     {1061, SyscallDesc("pause")},
-    {1062, SyscallDesc("time", timeFunc<RiscvLinux>)},
+    {1062, SyscallDesc("time", timeFunc<RiscvLinux32>)},
     {1063, SyscallDesc("utime")},
     {1064, SyscallDesc("creat")},
     {1065, SyscallDesc("getdents")},
@@ -400,12 +749,23 @@ std::map<int, SyscallDesc> RiscvLinuxProcess::syscallDescs = {
     {2011, SyscallDesc("getmainvars")}
 };
 
-RiscvLinuxProcess::RiscvLinuxProcess(ProcessParams * params,
-    ObjectFile *objFile) : RiscvProcess(params, objFile)
+RiscvLinuxProcess64::RiscvLinuxProcess64(ProcessParams * params,
+    ObjectFile *objFile) : RiscvProcess64(params, objFile)
+{}
+
+SyscallDesc*
+RiscvLinuxProcess64::getDesc(int callnum)
+{
+    return syscallDescs.find(callnum) != syscallDescs.end() ?
+        &syscallDescs.at(callnum) : nullptr;
+}
+
+RiscvLinuxProcess32::RiscvLinuxProcess32(ProcessParams * params,
+    ObjectFile *objFile) : RiscvProcess32(params, objFile)
 {}
 
 SyscallDesc*
-RiscvLinuxProcess::getDesc(int callnum)
+RiscvLinuxProcess32::getDesc(int callnum)
 {
     return syscallDescs.find(callnum) != syscallDescs.end() ?
         &syscallDescs.at(callnum) : nullptr;
diff --git a/src/arch/riscv/linux/process.hh b/src/arch/riscv/linux/process.hh
index f83037fd4..1256ac667 100644
--- a/src/arch/riscv/linux/process.hh
+++ b/src/arch/riscv/linux/process.hh
@@ -41,11 +41,29 @@
 #include "sim/eventq.hh"
 
 /// A process with emulated Riscv/Linux syscalls.
-class RiscvLinuxProcess : public RiscvProcess
+class RiscvLinuxProcess64 : public RiscvProcess64
 {
   public:
     /// Constructor.
-    RiscvLinuxProcess(ProcessParams * params, ObjectFile *objFile);
+    RiscvLinuxProcess64(ProcessParams * params, ObjectFile *objFile);
+
+    virtual SyscallDesc* getDesc(int callnum);
+
+    /// The target system's hostname.
+    static const char *hostname;
+
+    /// ID of the thread group leader for the process
+    uint64_t __tgid;
+
+    /// Array of syscall descriptors, indexed by call number.
+    static std::map<int, SyscallDesc> syscallDescs;
+};
+
+class RiscvLinuxProcess32 : public RiscvProcess32
+{
+  public:
+    /// Constructor.
+    RiscvLinuxProcess32(ProcessParams * params, ObjectFile *objFile);
 
     virtual SyscallDesc* getDesc(int callnum);
 
diff --git a/src/arch/riscv/process.cc b/src/arch/riscv/process.cc
index 7548c65b2..ed6de1546 100644
--- a/src/arch/riscv/process.cc
+++ b/src/arch/riscv/process.cc
@@ -67,6 +67,11 @@ RiscvProcess::RiscvProcess(ProcessParams *params, ObjectFile *objFile) :
                 objFile)
 {
     fatal_if(params->useArchPT, "Arch page tables not implemented.");
+}
+
+RiscvProcess64::RiscvProcess64(ProcessParams *params, ObjectFile *objFile) :
+        RiscvProcess(params, objFile)
+{
     const Addr stack_base = 0x7FFFFFFFFFFFFFFFL;
     const Addr max_stack_size = 8 * 1024 * 1024;
     const Addr next_thread_stack_base = stack_base - max_stack_size;
@@ -77,8 +82,21 @@ RiscvProcess::RiscvProcess(ProcessParams *params, ObjectFile *objFile) :
             next_thread_stack_base, mmap_end);
 }
 
+RiscvProcess32::RiscvProcess32(ProcessParams *params, ObjectFile *objFile) :
+        RiscvProcess(params, objFile)
+{
+    const Addr stack_base = 0x7FFFFFFF;
+    const Addr max_stack_size = 8 * 1024 * 1024;
+    const Addr next_thread_stack_base = stack_base - max_stack_size;
+    const Addr brk_point = roundUp(objFile->bssBase() + objFile->bssSize(),
+            PageBytes);
+    const Addr mmap_end = 0x40000000L;
+    memState = make_shared<MemState>(brk_point, stack_base, max_stack_size,
+                                     next_thread_stack_base, mmap_end);
+}
+
 void
-RiscvProcess::initState()
+RiscvProcess64::initState()
 {
     Process::initState();
 
@@ -87,10 +105,25 @@ RiscvProcess::initState()
         system->getThreadContext(ctx)->setMiscRegNoEffect(MISCREG_PRV, PRV_U);
 }
 
+void
+RiscvProcess32::initState()
+{
+    Process::initState();
+
+    argsInit<uint32_t>(PageBytes);
+    for (ContextID ctx: contextIds) {
+        system->getThreadContext(ctx)->setMiscRegNoEffect(MISCREG_PRV, PRV_U);
+        PCState pc = system->getThreadContext(ctx)->pcState();
+        pc.rv32(true);
+        system->getThreadContext(ctx)->pcState(pc);
+    }
+}
+
 template<class IntType> void
 RiscvProcess::argsInit(int pageSize)
 {
     const int RandomBytes = 16;
+    const int addrSize = sizeof(IntType);
 
     updateBias();
     objFile->loadSections(initVirtMem);
@@ -104,23 +137,24 @@ RiscvProcess::argsInit(int pageSize)
         stack_top -= arg.size() + 1;
     for (const string& env: envp)
         stack_top -= env.size() + 1;
-    stack_top &= -sizeof(Addr);
+    stack_top &= -addrSize;
 
-    vector<AuxVector<IntType>> auxv;
+    typedef AuxVector<IntType> auxv_t;
+    vector<auxv_t> auxv;
     if (elfObject != nullptr) {
-        auxv.push_back({M5_AT_ENTRY, objFile->entryPoint()});
-        auxv.push_back({M5_AT_PHNUM, elfObject->programHeaderCount()});
-        auxv.push_back({M5_AT_PHENT, elfObject->programHeaderSize()});
-        auxv.push_back({M5_AT_PHDR, elfObject->programHeaderTable()});
-        auxv.push_back({M5_AT_PAGESZ, PageBytes});
-        auxv.push_back({M5_AT_SECURE, 0});
-        auxv.push_back({M5_AT_RANDOM, stack_top});
-        auxv.push_back({M5_AT_NULL, 0});
+        auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint()));
+        auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount()));
+        auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize()));
+        auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable()));
+        auxv.push_back(auxv_t(M5_AT_PAGESZ, PageBytes));
+        auxv.push_back(auxv_t(M5_AT_SECURE, 0));
+        auxv.push_back(auxv_t(M5_AT_RANDOM, stack_top));
+        auxv.push_back(auxv_t(M5_AT_NULL, 0));
     }
-    stack_top -= (1 + argv.size()) * sizeof(Addr) +
-                   (1 + envp.size()) * sizeof(Addr) +
-                   sizeof(Addr) + 2 * sizeof(IntType) * auxv.size();
-    stack_top &= -2*sizeof(Addr);
+    stack_top -= (1 + argv.size()) * addrSize +
+                   (1 + envp.size()) * addrSize +
+                   addrSize + 2 * sizeof(IntType) * auxv.size();
+    stack_top &= -2*addrSize;
     memState->setStackSize(memState->getStackBase() - stack_top);
     allocateMem(roundDown(stack_top, pageSize),
             roundUp(memState->getStackSize(), pageSize));
@@ -159,14 +193,14 @@ RiscvProcess::argsInit(int pageSize)
     envPointers.push_back(0);
 
     // Align stack
-    memState->setStackMin(memState->getStackMin() & -sizeof(Addr));
+    memState->setStackMin(memState->getStackMin() & -addrSize);
 
     // Calculate bottom of stack
     memState->setStackMin(memState->getStackMin() -
-            ((1 + argv.size()) * sizeof(Addr) +
-             (1 + envp.size()) * sizeof(Addr) +
-             sizeof(Addr) + 2 * sizeof(IntType) * auxv.size()));
-    memState->setStackMin(memState->getStackMin() & -2*sizeof(Addr));
+            ((1 + argv.size()) * addrSize +
+             (1 + envp.size()) * addrSize +
+             addrSize + 2 * sizeof(IntType) * auxv.size()));
+    memState->setStackMin(memState->getStackMin() & -2*addrSize);
     Addr sp = memState->getStackMin();
     const auto pushOntoStack =
         [this, &sp](const uint8_t* data, const size_t size) {
@@ -182,14 +216,14 @@ RiscvProcess::argsInit(int pageSize)
     for (const Addr& argPointer: argPointers) {
         DPRINTF(Stack, "Wrote argv pointer %p to address %p\n",
                 (void*)argPointer, (void*)sp);
-        pushOntoStack((uint8_t*)&argPointer, sizeof(Addr));
+        pushOntoStack((uint8_t*)&argPointer, addrSize);
     }
 
     // Push env pointers onto stack
     for (const Addr& envPointer: envPointers) {
         DPRINTF(Stack, "Wrote envp pointer %p to address %p\n",
                 (void*)envPointer, (void*)sp);
-        pushOntoStack((uint8_t*)&envPointer, sizeof(Addr));
+        pushOntoStack((uint8_t*)&envPointer, addrSize);
     }
 
     // Push aux vector onto stack
diff --git a/src/arch/riscv/process.hh b/src/arch/riscv/process.hh
index 8b934b1d9..63e379931 100644
--- a/src/arch/riscv/process.hh
+++ b/src/arch/riscv/process.hh
@@ -47,9 +47,6 @@ class RiscvProcess : public Process
 {
   protected:
     RiscvProcess(ProcessParams * params, ObjectFile *objFile);
-
-    void initState() override;
-
     template<class IntType>
     void argsInit(int pageSize);
 
@@ -64,4 +61,18 @@ class RiscvProcess : public Process
     virtual bool mmapGrowsDown() const override { return false; }
 };
 
+class RiscvProcess64 : public RiscvProcess
+{
+  protected:
+    RiscvProcess64(ProcessParams * params, ObjectFile *objFile);
+    void initState() override;
+};
+
+class RiscvProcess32 : public RiscvProcess
+{
+  protected:
+    RiscvProcess32(ProcessParams * params, ObjectFile *objFile);
+    void initState() override;
+};
+
 #endif // __RISCV_PROCESS_HH__
diff --git a/src/arch/riscv/types.hh b/src/arch/riscv/types.hh
index f17d0b235..635ae1429 100644
--- a/src/arch/riscv/types.hh
+++ b/src/arch/riscv/types.hh
@@ -58,14 +58,18 @@ class PCState : public GenericISA::UPCState<MachInst>
 {
   private:
     bool _compressed;
+    bool _rv32;
 
   public:
-    PCState() : UPCState() { _compressed = false; }
-    PCState(Addr val) : UPCState(val) { _compressed = false; }
+    PCState() : UPCState() { _compressed = false; _rv32 = false; }
+    PCState(Addr val) : UPCState(val) { _compressed = false; _rv32 = false; }
 
     void compressed(bool c) { _compressed = c; }
     bool compressed() { return _compressed; }
 
+    void rv32(bool val) { _rv32 = val; }
+    bool rv32() const { return _rv32; }
+
     bool
     branching() const
     {
@@ -81,4 +85,4 @@ class PCState : public GenericISA::UPCState<MachInst>
 
 }
 
-#endif // __ARCH_RISCV_TYPES_HH__
\ No newline at end of file
+#endif // __ARCH_RISCV_TYPES_HH__