sim: m32r: unify ELF & Linux traps logic

This makes the simulator work the same regardless of the target (bare
metal m32r-elf or Linux m32r-linux-gnu) by unifying the traps code.
It was mostly already the same with the only difference being support
for trap #2 reserved for Linux syscalls.  We can move that logic to
runtime by checking the current environment operating mode instead.

1 files changed, 1185 insertions, 14 deletions

diff --git a/sim/m32r/traps.c b/sim/m32r/traps.c
index 4cec5c0..c4c1224 100644
--- a/sim/m32r/traps.c
+++ b/sim/m32r/traps.c
@@ -1,6 +1,6 @@
 /* m32r exception, interrupt, and trap (EIT) support
    Copyright (C) 1998-2021 Free Software Foundation, Inc.
-   Contributed by Cygnus Solutions.
+   Contributed by Cygnus Solutions & Renesas.
 
    This file is part of GDB, the GNU debugger.
 
@@ -20,12 +20,37 @@
 /* This must come before any other includes.  */
 #include "defs.h"
 
+#include "portability.h"
 #include "sim-main.h"
 #include "sim-signal.h"
 #include "sim-syscall.h"
+#include "sim/callback.h"
+#include "syscall.h"
 #include "targ-vals.h"
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
 #include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+#include <utime.h>
+#include <sys/mman.h>
+#include <sys/poll.h>
+#include <sys/resource.h>
+#include <sys/sysinfo.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/timeb.h>
+#include <sys/timex.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <sys/utsname.h>
+#include <sys/vfs.h>
+#include <linux/sysctl.h>
+#include <linux/types.h>
+#include <linux/unistd.h>
 
+#define TRAP_LINUX_SYSCALL 2
 #define TRAP_FLUSH_CACHE 12
 /* The semantic code invokes this for invalid (unrecognized) instructions.  */
 
@@ -87,7 +112,7 @@ m32r_core_signal (SIM_DESC sd, SIM_CPU *current_cpu, sim_cia cia,
 	default:
 	  abort ();
 	}
-	    
+
       m32rbf_h_cr_set (current_cpu, H_CR_BPC, cia);
 
       sim_engine_restart (CPU_STATE (current_cpu), current_cpu, NULL,
@@ -98,6 +123,52 @@ m32r_core_signal (SIM_DESC sd, SIM_CPU *current_cpu, sim_cia cia,
 		     transfer, sig);
 }
 
+/* Translate target's address to host's address.  */
+
+static void *
+t2h_addr (host_callback *cb, struct cb_syscall *sc,
+	  unsigned long taddr)
+{
+  void *addr;
+  SIM_DESC sd = (SIM_DESC) sc->p1;
+  SIM_CPU *cpu = (SIM_CPU *) sc->p2;
+
+  if (taddr == 0)
+    return NULL;
+
+  return sim_core_trans_addr (sd, cpu, read_map, taddr);
+}
+
+/* TODO: These functions are a big hack and assume that the host runtime has
+   type sizes and struct layouts that match the target.  So the Linux emulation
+   probaly only really works in 32-bit runtimes.  */
+
+static void
+translate_endian_h2t (void *addr, size_t size)
+{
+  unsigned int *p = (unsigned int *) addr;
+  int i;
+
+  for (i = 0; i <= size - 4; i += 4,p++)
+    *p = H2T_4 (*p);
+
+  if (i <= size - 2)
+    *((unsigned short *) p) = H2T_2 (*((unsigned short *) p));
+}
+
+static void
+translate_endian_t2h (void *addr, size_t size)
+{
+  unsigned int *p = (unsigned int *) addr;
+  int i;
+
+  for (i = 0; i <= size - 4; i += 4,p++)
+    *p = T2H_4 (*p);
+
+  if (i <= size - 2)
+    *((unsigned short *) p) = T2H_2 (*((unsigned short *) p));
+}
+
 /* Trap support.
    The result is the pc address to continue at.
    Preprocessing like saving the various registers has already been done.  */
@@ -109,18 +180,11 @@ m32r_trap (SIM_CPU *current_cpu, PCADDR pc, int num)
   host_callback *cb = STATE_CALLBACK (sd);
 
   if (STATE_ENVIRONMENT (sd) == OPERATING_ENVIRONMENT)
-    {
-      /* The new pc is the trap vector entry.
-	 We assume there's a branch there to some handler.
-         Use cr5 as EVB (EIT Vector Base) register.  */
-      /* USI new_pc = EIT_TRAP_BASE_ADDR + num * 4; */
-      USI new_pc = m32rbf_h_cr_get (current_cpu, 5) + 0x40 + num * 4;
-      return new_pc;
-    }
+    goto case_default;
 
   switch (num)
     {
-    case TRAP_SYSCALL :
+    case TRAP_SYSCALL:
       {
 	long result, result2;
 	int errcode;
@@ -139,6 +203,1110 @@ m32r_trap (SIM_CPU *current_cpu, PCADDR pc, int num)
 	break;
       }
 
+    case TRAP_LINUX_SYSCALL:
+      {
+	CB_SYSCALL s;
+        unsigned int func, arg1, arg2, arg3, arg4, arg5, arg6, arg7;
+        int result, result2, errcode;
+
+	if (STATE_ENVIRONMENT (sd) != USER_ENVIRONMENT)
+	  goto case_default;
+
+	func = m32rbf_h_gr_get (current_cpu, 7);
+	arg1 = m32rbf_h_gr_get (current_cpu, 0);
+	arg2 = m32rbf_h_gr_get (current_cpu, 1);
+	arg3 = m32rbf_h_gr_get (current_cpu, 2);
+	arg4 = m32rbf_h_gr_get (current_cpu, 3);
+	arg5 = m32rbf_h_gr_get (current_cpu, 4);
+	arg6 = m32rbf_h_gr_get (current_cpu, 5);
+	arg7 = m32rbf_h_gr_get (current_cpu, 6);
+
+        CB_SYSCALL_INIT (&s);
+        s.func = func;
+        s.arg1 = arg1;
+        s.arg2 = arg2;
+        s.arg3 = arg3;
+        s.arg4 = arg4;
+        s.arg5 = arg5;
+        s.arg6 = arg6;
+        s.arg7 = arg7;
+
+        s.p1 = (PTR) sd;
+        s.p2 = (PTR) current_cpu;
+        s.read_mem = sim_syscall_read_mem;
+        s.write_mem = sim_syscall_write_mem;
+
+        result = 0;
+        result2 = 0;
+        errcode = 0;
+
+        switch (func)
+          {
+          case TARGET_LINUX_SYS_exit:
+	    sim_engine_halt (sd, current_cpu, NULL, pc, sim_exited, arg1);
+            break;
+
+          case TARGET_LINUX_SYS_read:
+            result = read(arg1, t2h_addr(cb, &s, arg2), arg3);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_write:
+            result = write(arg1, t2h_addr(cb, &s, arg2), arg3);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_open:
+            result = open((char *) t2h_addr(cb, &s, arg1), arg2, arg3);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_close:
+            result = close(arg1);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_creat:
+            result = creat((char *) t2h_addr(cb, &s, arg1), arg2);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_link:
+            result = link((char *) t2h_addr(cb, &s, arg1),
+                          (char *) t2h_addr(cb, &s, arg2));
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_unlink:
+            result = unlink((char *) t2h_addr(cb, &s, arg1));
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_chdir:
+            result = chdir((char *) t2h_addr(cb, &s, arg1));
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_time:
+            {
+              time_t t;
+
+              if (arg1 == 0)
+                {
+                  result = (int) time(NULL);
+                  errcode = errno;
+                }
+              else
+                {
+                  result = (int) time(&t);
+                  errcode = errno;
+
+                  if (result != 0)
+                    break;
+
+                  t = H2T_4 (t);
+                  if ((s.write_mem) (cb, &s, arg1, (char *) &t, sizeof(t)) != sizeof(t))
+                    {
+                      result = -1;
+                      errcode = EINVAL;
+                    }
+                }
+            }
+            break;
+
+          case TARGET_LINUX_SYS_mknod:
+            result = mknod((char *) t2h_addr(cb, &s, arg1),
+                           (mode_t) arg2, (dev_t) arg3);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_chmod:
+            result = chmod((char *) t2h_addr(cb, &s, arg1), (mode_t) arg2);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_lchown32:
+          case TARGET_LINUX_SYS_lchown:
+            result = lchown((char *) t2h_addr(cb, &s, arg1),
+                            (uid_t) arg2, (gid_t) arg3);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_lseek:
+            result = (int) lseek(arg1, (off_t) arg2, arg3);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_getpid:
+            result = getpid();
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_getuid32:
+          case TARGET_LINUX_SYS_getuid:
+            result = getuid();
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_utime:
+            {
+              struct utimbuf buf;
+
+              if (arg2 == 0)
+                {
+                  result = utime((char *) t2h_addr(cb, &s, arg1), NULL);
+                  errcode = errno;
+                }
+              else
+                {
+                  buf = *((struct utimbuf *) t2h_addr(cb, &s, arg2));
+                  translate_endian_t2h (&buf, sizeof(buf));
+                  result = utime((char *) t2h_addr(cb, &s, arg1), &buf);
+                  errcode = errno;
+                }
+            }
+            break;
+
+          case TARGET_LINUX_SYS_access:
+            result = access((char *) t2h_addr(cb, &s, arg1), arg2);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_ftime:
+            {
+              struct timeb t;
+
+              result = ftime(&t);
+              errcode = errno;
+
+              if (result != 0)
+                break;
+
+              t.time = H2T_4 (t.time);
+              t.millitm = H2T_2 (t.millitm);
+              t.timezone = H2T_2 (t.timezone);
+              t.dstflag = H2T_2 (t.dstflag);
+              if ((s.write_mem) (cb, &s, arg1, (char *) &t, sizeof(t))
+                  != sizeof(t))
+                {
+                  result = -1;
+                  errcode = EINVAL;
+                }
+            }
+
+          case TARGET_LINUX_SYS_sync:
+            sync();
+            result = 0;
+            break;
+
+          case TARGET_LINUX_SYS_rename:
+            result = rename((char *) t2h_addr(cb, &s, arg1),
+                            (char *) t2h_addr(cb, &s, arg2));
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_mkdir:
+            result = mkdir((char *) t2h_addr(cb, &s, arg1), arg2);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_rmdir:
+            result = rmdir((char *) t2h_addr(cb, &s, arg1));
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_dup:
+            result = dup(arg1);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_brk:
+            result = brk((void *) arg1);
+            errcode = errno;
+            //result = arg1;
+            break;
+
+          case TARGET_LINUX_SYS_getgid32:
+          case TARGET_LINUX_SYS_getgid:
+            result = getgid();
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_geteuid32:
+          case TARGET_LINUX_SYS_geteuid:
+            result = geteuid();
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_getegid32:
+          case TARGET_LINUX_SYS_getegid:
+            result = getegid();
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_ioctl:
+            result = ioctl(arg1, arg2, arg3);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_fcntl:
+            result = fcntl(arg1, arg2, arg3);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_dup2:
+            result = dup2(arg1, arg2);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_getppid:
+            result = getppid();
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_getpgrp:
+            result = getpgrp();
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_getrlimit:
+            {
+              struct rlimit rlim;
+
+              result = getrlimit(arg1, &rlim);
+              errcode = errno;
+
+              if (result != 0)
+                break;
+
+              translate_endian_h2t (&rlim, sizeof(rlim));
+              if ((s.write_mem) (cb, &s, arg2, (char *) &rlim, sizeof(rlim))
+                  != sizeof(rlim))
+                {
+                  result = -1;
+                  errcode = EINVAL;
+                }
+            }
+            break;
+
+          case TARGET_LINUX_SYS_getrusage:
+            {
+              struct rusage usage;
+
+              result = getrusage(arg1, &usage);
+              errcode = errno;
+
+              if (result != 0)
+                break;
+
+              translate_endian_h2t (&usage, sizeof(usage));
+              if ((s.write_mem) (cb, &s, arg2, (char *) &usage, sizeof(usage))
+                  != sizeof(usage))
+                {
+                  result = -1;
+                  errcode = EINVAL;
+                }
+            }
+            break;
+
+          case TARGET_LINUX_SYS_gettimeofday:
+            {
+              struct timeval tv;
+              struct timezone tz;
+              
+              result = gettimeofday(&tv, &tz);
+              errcode = errno;
+              
+              if (result != 0)
+                break;
+
+              translate_endian_h2t (&tv, sizeof(tv));
+              if ((s.write_mem) (cb, &s, arg1, (char *) &tv, sizeof(tv))
+                  != sizeof(tv))
+                {
+                  result = -1;
+                  errcode = EINVAL;
+                }
+
+              translate_endian_h2t (&tz, sizeof(tz));
+              if ((s.write_mem) (cb, &s, arg2, (char *) &tz, sizeof(tz))
+                  != sizeof(tz))
+                {
+                  result = -1;
+                  errcode = EINVAL;
+                }
+            }
+            break;
+
+          case TARGET_LINUX_SYS_getgroups32:
+          case TARGET_LINUX_SYS_getgroups:
+            {
+              gid_t *list;
+
+              if (arg1 > 0)
+                list = (gid_t *) malloc(arg1 * sizeof(gid_t));
+
+              result = getgroups(arg1, list);
+              errcode = errno;
+
+              if (result != 0)
+                break;
+
+              translate_endian_h2t (list, arg1 * sizeof(gid_t));
+              if (arg1 > 0)
+                if ((s.write_mem) (cb, &s, arg2, (char *) list, arg1 * sizeof(gid_t))
+                    != arg1 * sizeof(gid_t))
+                  {
+                    result = -1;
+                     errcode = EINVAL;
+                  }
+            }
+            break;
+
+          case TARGET_LINUX_SYS_select:
+            {
+              int n;
+              fd_set readfds;
+              fd_set *treadfdsp;
+              fd_set *hreadfdsp;
+              fd_set writefds;
+              fd_set *twritefdsp;
+              fd_set *hwritefdsp;
+              fd_set exceptfds;
+              fd_set *texceptfdsp;
+              fd_set *hexceptfdsp;
+              struct timeval *ttimeoutp;
+              struct timeval timeout;
+              
+              n = arg1;
+
+              treadfdsp = (fd_set *) arg2;
+              if (treadfdsp != NULL)
+                {
+                  readfds = *((fd_set *) t2h_addr(cb, &s, (unsigned int) treadfdsp));
+                  translate_endian_t2h (&readfds, sizeof(readfds));
+                  hreadfdsp = &readfds;
+                }
+              else
+                hreadfdsp = NULL;
+              
+              twritefdsp  = (fd_set *) arg3;
+              if (twritefdsp != NULL)
+                {
+                  writefds = *((fd_set *) t2h_addr(cb, &s, (unsigned int) twritefdsp));
+                  translate_endian_t2h (&writefds, sizeof(writefds));
+                  hwritefdsp = &writefds;
+                }
+              else
+                hwritefdsp = NULL;
+              
+              texceptfdsp = (fd_set *) arg4;
+              if (texceptfdsp != NULL)
+                {
+                  exceptfds = *((fd_set *) t2h_addr(cb, &s, (unsigned int) texceptfdsp));
+                  translate_endian_t2h (&exceptfds, sizeof(exceptfds));
+                  hexceptfdsp = &exceptfds;
+                }
+              else
+                hexceptfdsp = NULL;
+              
+              ttimeoutp = (struct timeval *) arg5;
+              timeout = *((struct timeval *) t2h_addr(cb, &s, (unsigned int) ttimeoutp));
+              translate_endian_t2h (&timeout, sizeof(timeout));
+
+              result = select(n, hreadfdsp, hwritefdsp, hexceptfdsp, &timeout);
+              errcode = errno;
+
+              if (result != 0)
+                break;
+
+              if (treadfdsp != NULL)
+                {
+                  translate_endian_h2t (&readfds, sizeof(readfds));
+                  if ((s.write_mem) (cb, &s, (unsigned long) treadfdsp,
+                       (char *) &readfds, sizeof(readfds)) != sizeof(readfds))
+                    {
+                      result = -1;
+                      errcode = EINVAL;
+                    }
+                }
+
+              if (twritefdsp != NULL)
+                {
+                  translate_endian_h2t (&writefds, sizeof(writefds));
+                  if ((s.write_mem) (cb, &s, (unsigned long) twritefdsp,
+                       (char *) &writefds, sizeof(writefds)) != sizeof(writefds))
+                    {
+                      result = -1;
+                      errcode = EINVAL;
+                    }
+                }
+
+              if (texceptfdsp != NULL)
+                {
+                  translate_endian_h2t (&exceptfds, sizeof(exceptfds));
+                  if ((s.write_mem) (cb, &s, (unsigned long) texceptfdsp,
+                       (char *) &exceptfds, sizeof(exceptfds)) != sizeof(exceptfds))
+                    {
+                      result = -1;
+                      errcode = EINVAL;
+                    }
+                }
+
+              translate_endian_h2t (&timeout, sizeof(timeout));
+              if ((s.write_mem) (cb, &s, (unsigned long) ttimeoutp,
+                   (char *) &timeout, sizeof(timeout)) != sizeof(timeout))
+                {
+                  result = -1;
+                  errcode = EINVAL;
+                }
+            }
+            break;
+
+          case TARGET_LINUX_SYS_symlink:
+            result = symlink((char *) t2h_addr(cb, &s, arg1),
+                             (char *) t2h_addr(cb, &s, arg2));
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_readlink:
+            result = readlink((char *) t2h_addr(cb, &s, arg1),
+                              (char *) t2h_addr(cb, &s, arg2),
+                              arg3);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_readdir:
+            result = (int) readdir((DIR *) t2h_addr(cb, &s, arg1));
+            errcode = errno;
+            break;
+
+#if 0
+          case TARGET_LINUX_SYS_mmap:
+            {
+              result = (int) mmap((void *) t2h_addr(cb, &s, arg1),
+                                  arg2, arg3, arg4, arg5, arg6);
+              errcode = errno;
+
+              if (errno == 0)
+                {
+                  sim_core_attach (sd, NULL,
+                                   0, access_read_write_exec, 0,
+                                   result, arg2, 0, NULL, NULL);
+                }
+            }
+            break;
+#endif
+          case TARGET_LINUX_SYS_mmap2:
+            {
+              void *addr;
+              size_t len;
+              int prot, flags, fildes;
+              off_t off;
+              
+              addr   = (void *)  t2h_addr(cb, &s, arg1);
+              len    = arg2;
+              prot   = arg3;
+              flags  = arg4;
+              fildes = arg5;
+              off    = arg6 << 12;
+
+	      result = (int) mmap(addr, len, prot, flags, fildes, off);
+              errcode = errno;
+              if (result != -1)
+                {
+                  char c;
+		  if (sim_core_read_buffer (sd, NULL, read_map, &c, result, 1) == 0)
+                    sim_core_attach (sd, NULL,
+                                     0, access_read_write_exec, 0,
+                                     result, len, 0, NULL, NULL);
+                }
+            }
+            break;
+
+          case TARGET_LINUX_SYS_mmap:
+            {
+              void *addr;
+              size_t len;
+              int prot, flags, fildes;
+              off_t off;
+              
+              addr   = *((void **)  t2h_addr(cb, &s, arg1));
+              len    = *((size_t *) t2h_addr(cb, &s, arg1 + 4));
+              prot   = *((int *)    t2h_addr(cb, &s, arg1 + 8));
+              flags  = *((int *)    t2h_addr(cb, &s, arg1 + 12));
+              fildes = *((int *)    t2h_addr(cb, &s, arg1 + 16));
+              off    = *((off_t *)  t2h_addr(cb, &s, arg1 + 20));
+
+              addr   = (void *) T2H_4 ((unsigned int) addr);
+              len    = T2H_4 (len);
+              prot   = T2H_4 (prot);
+              flags  = T2H_4 (flags);
+              fildes = T2H_4 (fildes);
+              off    = T2H_4 (off);
+
+              //addr   = (void *) t2h_addr(cb, &s, (unsigned int) addr);
+              result = (int) mmap(addr, len, prot, flags, fildes, off);
+              errcode = errno;
+
+              //if (errno == 0)
+              if (result != -1)
+                {
+                  char c;
+		  if (sim_core_read_buffer (sd, NULL, read_map, &c, result, 1) == 0)
+                    sim_core_attach (sd, NULL,
+                                     0, access_read_write_exec, 0,
+                                     result, len, 0, NULL, NULL);
+                }
+            }
+            break;
+
+          case TARGET_LINUX_SYS_munmap:
+            {
+            result = munmap((void *)arg1, arg2);
+            errcode = errno;
+            if (result != -1)
+              {
+                sim_core_detach (sd, NULL, 0, arg2, result);
+              }
+            }
+            break;
+
+          case TARGET_LINUX_SYS_truncate:
+            result = truncate((char *) t2h_addr(cb, &s, arg1), arg2);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_ftruncate:
+            result = ftruncate(arg1, arg2);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_fchmod:
+            result = fchmod(arg1, arg2);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_fchown32:
+          case TARGET_LINUX_SYS_fchown:
+            result = fchown(arg1, arg2, arg3);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_statfs:
+            {
+              struct statfs statbuf;
+
+              result = statfs((char *) t2h_addr(cb, &s, arg1), &statbuf);
+              errcode = errno;
+
+              if (result != 0)
+                break;
+
+              translate_endian_h2t (&statbuf, sizeof(statbuf));
+              if ((s.write_mem) (cb, &s, arg2, (char *) &statbuf, sizeof(statbuf))
+                  != sizeof(statbuf))
+                {
+                  result = -1;
+                  errcode = EINVAL;
+                }
+            }
+            break;
+
+          case TARGET_LINUX_SYS_fstatfs:
+            {
+              struct statfs statbuf;
+
+              result = fstatfs(arg1, &statbuf);
+              errcode = errno;
+
+              if (result != 0)
+                break;
+
+              translate_endian_h2t (&statbuf, sizeof(statbuf));
+              if ((s.write_mem) (cb, &s, arg2, (char *) &statbuf, sizeof(statbuf))
+                  != sizeof(statbuf))
+                {
+                  result = -1;
+                  errcode = EINVAL;
+                }
+            }
+            break;
+
+          case TARGET_LINUX_SYS_syslog:
+            result = syslog(arg1, (char *) t2h_addr(cb, &s, arg2));
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_setitimer:
+            {
+              struct itimerval value, ovalue;
+
+              value = *((struct itimerval *) t2h_addr(cb, &s, arg2));
+              translate_endian_t2h (&value, sizeof(value));
+
+              if (arg2 == 0)
+                {
+                  result = setitimer(arg1, &value, NULL);
+                  errcode = errno;
+                }
+              else
+                {
+                  result = setitimer(arg1, &value, &ovalue);
+                  errcode = errno;
+
+                  if (result != 0)
+                    break;
+
+                  translate_endian_h2t (&ovalue, sizeof(ovalue));
+                  if ((s.write_mem) (cb, &s, arg3, (char *) &ovalue, sizeof(ovalue))
+                      != sizeof(ovalue))
+                    {
+                      result = -1;
+                      errcode = EINVAL;
+                    }
+                }
+            }
+            break;
+
+          case TARGET_LINUX_SYS_getitimer:
+            {
+              struct itimerval value;
+
+              result = getitimer(arg1, &value);
+              errcode = errno;
+
+              if (result != 0)
+                break;
+
+              translate_endian_h2t (&value, sizeof(value));
+              if ((s.write_mem) (cb, &s, arg2, (char *) &value, sizeof(value))
+                  != sizeof(value))
+                {
+                  result = -1;
+                  errcode = EINVAL;
+                }
+            }
+            break;
+
+          case TARGET_LINUX_SYS_stat:
+            {
+              char *buf;
+              int buflen;
+              struct stat statbuf;
+
+              result = stat((char *) t2h_addr(cb, &s, arg1), &statbuf);
+              errcode = errno;
+              if (result < 0)
+                break;
+
+              buflen = cb_host_to_target_stat (cb, NULL, NULL);
+              buf = xmalloc (buflen);
+              if (cb_host_to_target_stat (cb, &statbuf, buf) != buflen)
+                {
+                  /* The translation failed.  This is due to an internal
+                     host program error, not the target's fault.  */
+                  free (buf);
+                  result = -1;
+                  errcode = ENOSYS;
+                  break;
+                }
+              if ((s.write_mem) (cb, &s, arg2, buf, buflen) != buflen)
+                {
+                  free (buf);
+                  result = -1;
+                  errcode = EINVAL;
+                  break;
+                }
+              free (buf);
+            }
+            break;
+
+          case TARGET_LINUX_SYS_lstat:
+            {
+              char *buf;
+              int buflen;
+              struct stat statbuf;
+
+              result = lstat((char *) t2h_addr(cb, &s, arg1), &statbuf);
+              errcode = errno;
+              if (result < 0)
+                break;
+
+              buflen = cb_host_to_target_stat (cb, NULL, NULL);
+              buf = xmalloc (buflen);
+              if (cb_host_to_target_stat (cb, &statbuf, buf) != buflen)
+                {
+                  /* The translation failed.  This is due to an internal
+                     host program error, not the target's fault.  */
+                  free (buf);
+                  result = -1;
+                  errcode = ENOSYS;
+                  break;
+                }
+              if ((s.write_mem) (cb, &s, arg2, buf, buflen) != buflen)
+                {
+                  free (buf);
+                  result = -1;
+                  errcode = EINVAL;
+                  break;
+                }
+              free (buf);
+            }
+            break;
+
+          case TARGET_LINUX_SYS_fstat:
+            {
+              char *buf;
+              int buflen;
+              struct stat statbuf;
+
+              result = fstat(arg1, &statbuf);
+              errcode = errno;
+              if (result < 0)
+                break;
+
+              buflen = cb_host_to_target_stat (cb, NULL, NULL);
+              buf = xmalloc (buflen);
+              if (cb_host_to_target_stat (cb, &statbuf, buf) != buflen)
+                {
+                  /* The translation failed.  This is due to an internal
+                     host program error, not the target's fault.  */
+                  free (buf);
+                  result = -1;
+                  errcode = ENOSYS;
+                  break;
+                }
+              if ((s.write_mem) (cb, &s, arg2, buf, buflen) != buflen)
+                {
+                  free (buf);
+                  result = -1;
+                  errcode = EINVAL;
+                  break;
+                }
+              free (buf);
+            }
+            break;
+
+          case TARGET_LINUX_SYS_sysinfo:
+            {
+              struct sysinfo info;
+
+              result = sysinfo(&info);
+              errcode = errno;
+
+              if (result != 0)
+                break;
+
+              info.uptime    = H2T_4 (info.uptime);
+              info.loads[0]  = H2T_4 (info.loads[0]);
+              info.loads[1]  = H2T_4 (info.loads[1]);
+              info.loads[2]  = H2T_4 (info.loads[2]);
+              info.totalram  = H2T_4 (info.totalram);
+              info.freeram   = H2T_4 (info.freeram);
+              info.sharedram = H2T_4 (info.sharedram);
+              info.bufferram = H2T_4 (info.bufferram);
+              info.totalswap = H2T_4 (info.totalswap);
+              info.freeswap  = H2T_4 (info.freeswap);
+              info.procs     = H2T_2 (info.procs);
+#if LINUX_VERSION_CODE >= 0x20400
+              info.totalhigh = H2T_4 (info.totalhigh);
+              info.freehigh  = H2T_4 (info.freehigh);
+              info.mem_unit  = H2T_4 (info.mem_unit);
+#endif
+              if ((s.write_mem) (cb, &s, arg1, (char *) &info, sizeof(info))
+                  != sizeof(info))
+                {
+                  result = -1;
+                  errcode = EINVAL;
+                }
+            }
+            break;
+
+#if 0
+          case TARGET_LINUX_SYS_ipc:
+            {
+              result = ipc(arg1, arg2, arg3, arg4,
+                           (void *) t2h_addr(cb, &s, arg5), arg6);
+              errcode = errno;
+            }
+            break;
+#endif
+
+          case TARGET_LINUX_SYS_fsync:
+            result = fsync(arg1);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_uname:
+            /* utsname contains only arrays of char, so it is not necessary
+               to translate endian. */
+            result = uname((struct utsname *) t2h_addr(cb, &s, arg1));
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_adjtimex:
+            {
+              struct timex buf;
+
+              result = adjtimex(&buf);
+              errcode = errno;
+
+              if (result != 0)
+                break;
+
+              translate_endian_h2t (&buf, sizeof(buf));
+              if ((s.write_mem) (cb, &s, arg1, (char *) &buf, sizeof(buf))
+                  != sizeof(buf))
+                {
+                  result = -1;
+                  errcode = EINVAL;
+                }
+            }
+            break;
+
+          case TARGET_LINUX_SYS_mprotect:
+            result = mprotect((void *) arg1, arg2, arg3);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_fchdir:
+            result = fchdir(arg1);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_setfsuid32:
+          case TARGET_LINUX_SYS_setfsuid:
+            result = setfsuid(arg1);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_setfsgid32:
+          case TARGET_LINUX_SYS_setfsgid:
+            result = setfsgid(arg1);
+            errcode = errno;
+            break;
+
+#if 0
+          case TARGET_LINUX_SYS__llseek:
+            {
+              loff_t buf;
+
+              result = _llseek(arg1, arg2, arg3, &buf, arg5);
+              errcode = errno;
+
+              if (result != 0)
+                break;
+
+              translate_endian_h2t (&buf, sizeof(buf));
+              if ((s.write_mem) (cb, &s, t2h_addr(cb, &s, arg4),
+                                 (char *) &buf, sizeof(buf)) != sizeof(buf))
+                {
+                  result = -1;
+                  errcode = EINVAL;
+                }
+            }
+            break;
+
+          case TARGET_LINUX_SYS_getdents:
+            {
+              struct dirent dir;
+
+              result = getdents(arg1, &dir, arg3);
+              errcode = errno;
+
+              if (result != 0)
+                break;
+
+              dir.d_ino = H2T_4 (dir.d_ino);
+              dir.d_off = H2T_4 (dir.d_off);
+              dir.d_reclen = H2T_2 (dir.d_reclen);
+              if ((s.write_mem) (cb, &s, arg2, (char *) &dir, sizeof(dir))
+                  != sizeof(dir))
+                {
+                  result = -1;
+                  errcode = EINVAL;
+                }
+            }
+            break;
+#endif
+
+          case TARGET_LINUX_SYS_flock:
+            result = flock(arg1, arg2);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_msync:
+            result = msync((void *) arg1, arg2, arg3);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_readv:
+            {
+              struct iovec vector;
+
+              vector = *((struct iovec *) t2h_addr(cb, &s, arg2));
+              translate_endian_t2h (&vector, sizeof(vector));
+
+              result = readv(arg1, &vector, arg3);
+              errcode = errno;
+            }
+            break;
+
+          case TARGET_LINUX_SYS_writev:
+            {
+              struct iovec vector;
+
+              vector = *((struct iovec *) t2h_addr(cb, &s, arg2));
+              translate_endian_t2h (&vector, sizeof(vector));
+
+              result = writev(arg1, &vector, arg3);
+              errcode = errno;
+            }
+            break;
+
+          case TARGET_LINUX_SYS_fdatasync:
+            result = fdatasync(arg1);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_mlock:
+            result = mlock((void *) t2h_addr(cb, &s, arg1), arg2);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_munlock:
+            result = munlock((void *) t2h_addr(cb, &s, arg1), arg2);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_nanosleep:
+            {
+              struct timespec req, rem;
+
+              req = *((struct timespec *) t2h_addr(cb, &s, arg2));
+              translate_endian_t2h (&req, sizeof(req));
+
+              result = nanosleep(&req, &rem);
+              errcode = errno;
+
+              if (result != 0)
+                break;
+
+              translate_endian_h2t (&rem, sizeof(rem));
+              if ((s.write_mem) (cb, &s, arg2, (char *) &rem, sizeof(rem))
+                  != sizeof(rem))
+                {
+                  result = -1;
+                  errcode = EINVAL;
+                }
+            }
+            break;
+
+          case TARGET_LINUX_SYS_mremap: /* FIXME */
+            result = (int) mremap((void *) t2h_addr(cb, &s, arg1), arg2, arg3, arg4); 
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_getresuid32:
+          case TARGET_LINUX_SYS_getresuid:
+            {
+              uid_t ruid, euid, suid;
+
+              result = getresuid(&ruid, &euid, &suid);
+              errcode = errno;
+
+              if (result != 0)
+                break;
+
+              *((uid_t *) t2h_addr(cb, &s, arg1)) = H2T_4 (ruid);
+              *((uid_t *) t2h_addr(cb, &s, arg2)) = H2T_4 (euid);
+              *((uid_t *) t2h_addr(cb, &s, arg3)) = H2T_4 (suid);
+            }
+            break;
+
+          case TARGET_LINUX_SYS_poll:
+            {
+              struct pollfd ufds;
+
+              ufds = *((struct pollfd *) t2h_addr(cb, &s, arg1));
+              ufds.fd = T2H_4 (ufds.fd);
+              ufds.events = T2H_2 (ufds.events);
+              ufds.revents = T2H_2 (ufds.revents);
+
+              result = poll(&ufds, arg2, arg3);
+              errcode = errno;
+            }
+            break;
+
+          case TARGET_LINUX_SYS_getresgid32:
+          case TARGET_LINUX_SYS_getresgid:
+            {
+              uid_t rgid, egid, sgid;
+
+              result = getresgid(&rgid, &egid, &sgid);
+              errcode = errno;
+
+              if (result != 0)
+                break;
+
+              *((uid_t *) t2h_addr(cb, &s, arg1)) = H2T_4 (rgid);
+              *((uid_t *) t2h_addr(cb, &s, arg2)) = H2T_4 (egid);
+              *((uid_t *) t2h_addr(cb, &s, arg3)) = H2T_4 (sgid);
+            }
+            break;
+
+          case TARGET_LINUX_SYS_pread:
+            result =  pread(arg1, (void *) t2h_addr(cb, &s, arg2), arg3, arg4); 
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_pwrite:
+            result =  pwrite(arg1, (void *) t2h_addr(cb, &s, arg2), arg3, arg4); 
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_chown32:
+          case TARGET_LINUX_SYS_chown:
+            result = chown((char *) t2h_addr(cb, &s, arg1), arg2, arg3);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_getcwd:
+            result = (int) getcwd((char *) t2h_addr(cb, &s, arg1), arg2);
+            errcode = errno;
+            break;
+
+          case TARGET_LINUX_SYS_sendfile:
+            {
+              off_t offset;
+
+              offset = *((off_t *) t2h_addr(cb, &s, arg3));
+              offset = T2H_4 (offset);
+
+              result = sendfile(arg1, arg2, &offset, arg3);
+              errcode = errno;
+
+              if (result != 0)
+                break;
+
+              *((off_t *) t2h_addr(cb, &s, arg3)) = H2T_4 (offset);
+            }
+            break;
+
+          default:
+            result = -1;
+            errcode = ENOSYS;
+            break;
+          }
+        
+        if (result == -1)
+	  m32rbf_h_gr_set (current_cpu, 0, -errcode);
+        else
+	  m32rbf_h_gr_set (current_cpu, 0, result);
+	break;
+      }
+
     case TRAP_BREAKPOINT:
       sim_engine_halt (sd, current_cpu, NULL, pc,
 		       sim_stopped, SIM_SIGTRAP);
@@ -148,11 +1316,14 @@ m32r_trap (SIM_CPU *current_cpu, PCADDR pc, int num)
       /* Do nothing.  */
       break;
 
-    default :
+    case_default:
+    default:
       {
+	/* The new pc is the trap vector entry.
+	   We assume there's a branch there to some handler.
+	   Use cr5 as EVB (EIT Vector Base) register.  */
 	/* USI new_pc = EIT_TRAP_BASE_ADDR + num * 4; */
-        /* Use cr5 as EVB (EIT Vector Base) register.  */
-        USI new_pc = m32rbf_h_cr_get (current_cpu, 5) + 0x40 + num * 4;
+	USI new_pc = m32rbf_h_cr_get (current_cpu, 5) + 0x40 + num * 4;
 	return new_pc;
       }
     }