
/*--------------------------------------------------------------------*/
/*--- Platform-specific syscalls stuff.    syswrap-mips32-linux.c ----*/
/*--------------------------------------------------------------------*/

/*
   This file is part of Valgrind, a dynamic binary instrumentation
   framework.

   Copyright (C) 2010-2013 RT-RK
      mips-valgrind@rt-rk.com

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   This program is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307, USA.

   The GNU General Public License is contained in the file COPYING.
*/

#if defined(VGP_mips32_linux)
#include "pub_core_basics.h"
#include "pub_core_vki.h"
#include "pub_core_vkiscnums.h"
#include "pub_core_threadstate.h"
#include "pub_core_aspacemgr.h"
#include "pub_core_debuglog.h"
#include "pub_core_libcbase.h"
#include "pub_core_libcassert.h"
#include "pub_core_libcprint.h"
#include "pub_core_libcproc.h"
#include "pub_core_libcsignal.h"
#include "pub_core_options.h"
#include "pub_core_scheduler.h"
#include "pub_core_sigframe.h"     // For VG_(sigframe_destroy)()
#include "pub_core_signals.h"
#include "pub_core_syscall.h"
#include "pub_core_syswrap.h"
#include "pub_core_tooliface.h"
#include "pub_core_transtab.h"      // VG_(discard_translations)
#include "priv_types_n_macros.h"
#include "priv_syswrap-generic.h"   /* for decls of generic wrappers */
#include "priv_syswrap-linux.h"     /* for decls of linux-ish wrappers */
#include "priv_syswrap-main.h"

#include "pub_core_debuginfo.h"     // VG_(di_notify_*)
#include "pub_core_xarray.h"
#include "pub_core_clientstate.h"   // VG_(brk_base), VG_(brk_limit)
#include "pub_core_errormgr.h"
#include "pub_core_gdbserver.h"     // VG_(gdbserver)
#include "pub_core_libcfile.h"
#include "pub_core_machine.h"       // VG_(get_SP)
#include "pub_core_mallocfree.h"
#include "pub_core_stacktrace.h"    // For VG_(get_and_pp_StackTrace)()
#include "pub_core_ume.h"

#include "priv_syswrap-generic.h"

#include "config.h"

#include <errno.h>

/* ---------------------------------------------------------------------
                             clone() handling
   ------------------------------------------------------------------ */ 
/* Call f(arg1), but first switch stacks, using 'stack' as the new
   stack, and use 'retaddr' as f's return-to address.  Also, clear all
   the integer registers before entering f.*/ 

__attribute__ ((noreturn)) 
void ML_ (call_on_new_stack_0_1) (Addr stack, Addr retaddr, 
                                  void (*f) (Word), Word arg1);
//    a0 = stack
//    a1 = retaddr
//    a2 = f
//    a3 = arg1
asm (
".text\n" 
".globl vgModuleLocal_call_on_new_stack_0_1\n" 
"vgModuleLocal_call_on_new_stack_0_1:\n" 
"   move	$29, $4\n\t"	// stack to %sp
"   move	$25, $6\n\t"	// f to t9/$25 
"   move 	$4, $7\n\t"	// arg1 to $a0
"   li 		$2, 0\n\t"	// zero all GP regs
"   li 		$3, 0\n\t" 
"   li 		$5, 0\n\t" 
"   li 		$6, 0\n\t" 
"   li 		$7, 0\n\t" 

"   li 		$12, 0\n\t" 
"   li 		$13, 0\n\t" 
"   li 		$14, 0\n\t" 
"   li 		$15, 0\n\t" 
"   li 		$16, 0\n\t" 
"   li 		$17, 0\n\t" 
"   li 		$18, 0\n\t" 
"   li 		$19, 0\n\t" 
"   li 		$20, 0\n\t" 
"   li 		$21, 0\n\t" 
"   li 		$22, 0\n\t" 
"   li 		$23, 0\n\t" 
"   li 		$24, 0\n\t" 
"   jr 		$25\n\t"	// jump to dst
"   break	0x7\n"	// should never get here
".previous\n" 
);

/*
        Perform a clone system call.  clone is strange because it has
        fork()-like return-twice semantics, so it needs special
        handling here.
        Upon entry, we have:
            int (fn)(void*)     in  $a0       0
            void* child_stack   in  $a1       4
            int flags           in  $a2       8
            void* arg           in  $a3       12
            pid_t* child_tid    in  stack     16
            pid_t* parent_tid   in  stack     20
            void* tls_ptr       in  stack     24

        System call requires:
            int    $__NR_clone  in $v0
            int    flags        in $a0   0
            void*  child_stack  in $a1   4
            pid_t* parent_tid   in $a2   8
            void*  tls_ptr      in $a3   12
            pid_t* child_tid    in stack 16

   int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg,
             void *parent_tidptr, void *tls, void *child_tidptr) 

   Returns an Int encoded in the linux-mips way, not a SysRes.
 */ 
#define __NR_CLONE        VG_STRINGIFY(__NR_clone)
#define __NR_EXIT         VG_STRINGIFY(__NR_exit)

//extern
UInt do_syscall_clone_mips_linux (Word (*fn) (void *), //a0      0     32
                                   void *stack,         //a1      4     36
                                   Int flags,           //a2      8     40
                                   void *arg,           //a3      12    44
                                   Int * child_tid,     //stack   16    48
                                   Int * parent_tid,    //stack   20    52
                                   Int tls);          //stack   24    56
asm (
".text\n" 
"   .globl   do_syscall_clone_mips_linux\n" 
"   do_syscall_clone_mips_linux:\n"
"   subu    $29,$29,32\n\t"
"   sw $31, 0($29)\n\t"
"   sw $2, 4($29)\n\t"
"   sw $3, 8($29)\n\t"
"   sw $30, 12($29)\n\t"
"   sw $28, 28($29)\n\t"
    /* set up child stack with function and arg */
    /* syscall arg 2 child_stack is already in a1 */
"   subu $5, $5, 32\n\t" /* make space on stack */
"   sw $4, 0($5)\n\t" /* fn  */
"   sw $7, 4($5)\n\t" /* fn arg */
"   sw $6, 8($5)\n\t"
    /* get other args to clone */

"   move $4, $a2\n\t" /* a0 = flags */
"   lw $6,  52($29)\n\t" /* a2 = parent_tid */
"   lw $7,  48($29)\n\t" /* a3 = child_tid */
"   sw $7,  16($29)\n\t" /* 16(sp) = child_tid */
"   lw $7,  56($29)\n\t" /* a3 = tls_ptr */  
    /* do the system call */

"   li $2, " __NR_CLONE "\n\t" /* __NR_clone */
"   syscall\n\t"
"   nop\n\t"

"   bnez    $7, .Lerror\n\t" 
"   nop\n\t" 
"   beqz    $2, .Lstart\n\t" 
"   nop\n\t" 

"   lw      $31, 0($sp)\n\t" 
"   nop\n\t" 
"   lw      $30, 12($sp)\n\t" 
"   nop\n\t" 
"   addu    $29,$29,32\n\t" /* free stack */  
"   nop\n\t" 
"   jr      $31\n\t" 
"   nop\n\t" 

".Lerror:\n\t" 
"   li      $31, 5\n\t" 
"   jr      $31\n\t" 
"   nop\n\t" 

".Lstart:\n\t" 
"   lw      $4,  4($29)\n\t" 
"   nop\n\t" 
"   lw      $25, 0($29)\n\t" 
"   nop\n\t" 
"   jalr    $25\n\t" 
"   nop\n\t" 

"   move $4, $2\n\t" /* retval from fn is in $v0 */  
"   li $2, " __NR_EXIT "\n\t" /* NR_exit */  
"   syscall\n\t" 
"   nop\n\t" 
"   .previous\n" 
);

#undef __NR_CLONE
#undef __NR_EXIT

// forward declarations

static void setup_child (ThreadArchState *, ThreadArchState *);
static SysRes sys_set_tls (ThreadId tid, Addr tlsptr);
static SysRes mips_PRE_sys_mmap (ThreadId tid,
                                 UWord arg1, UWord arg2, UWord arg3,
                                 UWord arg4, UWord arg5, Off64T arg6);
/* 
   When a client clones, we need to keep track of the new thread.  This means:
   1. allocate a ThreadId+ThreadState+stack for the the thread
   2. initialize the thread's new VCPU state
   3. create the thread using the same args as the client requested,
   but using the scheduler entrypoint for IP, and a separate stack
   for SP.
 */ 

static SysRes do_clone (ThreadId ptid, 
                        UInt flags, Addr sp, 
                        Int * parent_tidptr,
                        Int * child_tidptr, 
                        Addr child_tls) 
{
   const Bool debug = False;
   ThreadId ctid = VG_ (alloc_ThreadState) ();
   ThreadState * ptst = VG_ (get_ThreadState) (ptid);
   ThreadState * ctst = VG_ (get_ThreadState) (ctid);
   UInt ret = 0;
   UWord * stack;
   SysRes res;
   vki_sigset_t blockall, savedmask;

   VG_ (sigfillset) (&blockall);
   vg_assert (VG_ (is_running_thread) (ptid));
   vg_assert (VG_ (is_valid_tid) (ctid));
   stack = (UWord *) ML_ (allocstack) (ctid);
   if (stack == NULL) {
      res = VG_ (mk_SysRes_Error) (VKI_ENOMEM);
      goto out;
   }
   setup_child (&ctst->arch, &ptst->arch);

   /* on MIPS we need to set V0 and A3 to zero */ 
   ctst->arch.vex.guest_r2 = 0;
   ctst->arch.vex.guest_r7 = 0;
   if (sp != 0)
      ctst->arch.vex.guest_r29 = sp;

   ctst->os_state.parent = ptid;
   ctst->sig_mask = ptst->sig_mask;
   ctst->tmp_sig_mask = ptst->sig_mask;

   /* Start the child with its threadgroup being the same as the
      parent's.  This is so that any exit_group calls that happen
      after the child is created but before it sets its
      os_state.threadgroup field for real (in thread_wrapper in
      syswrap-linux.c), really kill the new thread.  a.k.a this avoids
      a race condition in which the thread is unkillable (via
      exit_group) because its threadgroup is not set.  The race window
      is probably only a few hundred or a few thousand cycles long.
      See #226116. */ 

   ctst->os_state.threadgroup = ptst->os_state.threadgroup;

   ML_(guess_and_register_stack) (sp, ctst);

   VG_TRACK (pre_thread_ll_create, ptid, ctid);
   if (flags & VKI_CLONE_SETTLS) {
      if (debug)
        VG_(printf)("clone child has SETTLS: tls at %#lx\n", child_tls);
      ctst->arch.vex.guest_r27 = child_tls;
      res = sys_set_tls(ctid, child_tls);
      if (sr_isError(res))
         goto out;
      ctst->arch.vex.guest_r27 = child_tls;
  }

   flags &= ~VKI_CLONE_SETTLS;
   VG_ (sigprocmask) (VKI_SIG_SETMASK, &blockall, &savedmask);
   /* Create the new thread */ 
   ret = do_syscall_clone_mips_linux (ML_ (start_thread_NORETURN),
                                    stack, flags, &VG_ (threads)[ctid], 
                                    child_tidptr, parent_tidptr,
                                    0 /*child_tls*/);

   /* High half word64 is syscall return value.  Low half is
      the entire CR, from which we need to extract CR0.SO. */ 
   if (debug)
      VG_(printf)("ret: 0x%x\n", ret);

   res = VG_ (mk_SysRes_mips32_linux) (/*val */ ret, 0, /*errflag */ 0);

   VG_ (sigprocmask) (VKI_SIG_SETMASK, &savedmask, NULL);

   out:
   if (sr_isError (res)) {
      VG_(cleanup_thread) (&ctst->arch);
      ctst->status = VgTs_Empty;
      VG_TRACK (pre_thread_ll_exit, ctid);
   }
   ptst->arch.vex.guest_r2 = 0;

   return res;
}

/* ---------------------------------------------------------------------
   More thread stuff
   ------------------------------------------------------------------ */ 

// MIPS doesn't have any architecture specific thread stuff that
// needs to be cleaned up da li ????!!!!???
void
VG_ (cleanup_thread) (ThreadArchState * arch) { } 

void
setup_child ( /*OUT*/ ThreadArchState * child,
              /*IN*/ ThreadArchState * parent) 
{
   /* We inherit our parent's guest state. */ 
   child->vex = parent->vex;
   child->vex_shadow1 = parent->vex_shadow1;
   child->vex_shadow2 = parent->vex_shadow2;
}

SysRes sys_set_tls ( ThreadId tid, Addr tlsptr )
{
   VG_(threads)[tid].arch.vex.guest_ULR = tlsptr;
   return VG_(mk_SysRes_Success)( 0 );
}

/* ---------------------------------------------------------------------
   mips handler for mmap and mmap2
   ------------------------------------------------------------------ */
static void notify_core_of_mmap(Addr a, SizeT len, UInt prot,
                                UInt flags, Int fd, Off64T offset)
{
   Bool d;

   /* 'a' is the return value from a real kernel mmap, hence: */
   vg_assert(VG_IS_PAGE_ALIGNED(a));
   /* whereas len is whatever the syscall supplied.  So: */
   len = VG_PGROUNDUP(len);

   d = VG_(am_notify_client_mmap)( a, len, prot, flags, fd, offset );

   if (d)
      VG_(discard_translations)( a, (ULong)len,
                                 "notify_core_of_mmap" );
}

static void notify_tool_of_mmap(Addr a, SizeT len, UInt prot, ULong di_handle)
{
   Bool rr, ww, xx;

   /* 'a' is the return value from a real kernel mmap, hence: */
   vg_assert(VG_IS_PAGE_ALIGNED(a));
   /* whereas len is whatever the syscall supplied.  So: */
   len = VG_PGROUNDUP(len);

   rr = toBool(prot & VKI_PROT_READ);
   ww = toBool(prot & VKI_PROT_WRITE);
   xx = toBool(prot & VKI_PROT_EXEC);

   VG_TRACK( new_mem_mmap, a, len, rr, ww, xx, di_handle );
}

/* Based on ML_(generic_PRE_sys_mmap) from syswrap-generic.c.
   If we are trying to do mmap with VKI_MAP_SHARED flag we need to align the
   start address on VKI_SHMLBA like we did in
   VG_(am_mmap_file_float_valgrind_flags)
 */
static SysRes mips_PRE_sys_mmap(ThreadId tid,
                                UWord arg1, UWord arg2, UWord arg3,
                                UWord arg4, UWord arg5, Off64T arg6)
{
   Addr       advised;
   SysRes     sres;
   MapRequest mreq;
   Bool       mreq_ok;

   if (arg2 == 0) {
      /* SuSV3 says: If len is zero, mmap() shall fail and no mapping
         shall be established. */
      return VG_(mk_SysRes_Error)( VKI_EINVAL );
   }

   if (!VG_IS_PAGE_ALIGNED(arg1)) {
      /* zap any misaligned addresses. */
      /* SuSV3 says misaligned addresses only cause the MAP_FIXED case
         to fail.   Here, we catch them all. */
      return VG_(mk_SysRes_Error)( VKI_EINVAL );
   }

   if (!VG_IS_PAGE_ALIGNED(arg6)) {
      /* zap any misaligned offsets. */
      /* SuSV3 says: The off argument is constrained to be aligned and
         sized according to the value returned by sysconf() when
         passed _SC_PAGESIZE or _SC_PAGE_SIZE. */
      return VG_(mk_SysRes_Error)( VKI_EINVAL );
   }

   /* Figure out what kind of allocation constraints there are
      (fixed/hint/any), and ask aspacem what we should do. */
   mreq.start = arg1;
   mreq.len   = arg2;
   if (arg4 & VKI_MAP_FIXED) {
      mreq.rkind = MFixed;
   } else
   if (arg1 != 0) {
      mreq.rkind = MHint;
   } else {
      mreq.rkind = MAny;
   }

   if ((VKI_SHMLBA > VKI_PAGE_SIZE) && (VKI_MAP_SHARED & arg4)
       && !(VKI_MAP_FIXED & arg4))
      mreq.len = arg2 + VKI_SHMLBA - VKI_PAGE_SIZE;

   /* Enquire ... */
   advised = VG_(am_get_advisory)( &mreq, True/*client*/, &mreq_ok );

   if ((VKI_SHMLBA > VKI_PAGE_SIZE) && (VKI_MAP_SHARED & arg4)
       && !(VKI_MAP_FIXED & arg4))
      advised = VG_ROUNDUP(advised, VKI_SHMLBA);

   if (!mreq_ok) {
      /* Our request was bounced, so we'd better fail. */
      return VG_(mk_SysRes_Error)( VKI_EINVAL );
   }

   /* Otherwise we're OK (so far).  Install aspacem's choice of
      address, and let the mmap go through.  */
   sres = VG_(am_do_mmap_NO_NOTIFY)(advised, arg2, arg3,
                                    arg4 | VKI_MAP_FIXED,
                                    arg5, arg6);

   /* A refinement: it may be that the kernel refused aspacem's choice
      of address.  If we were originally asked for a hinted mapping,
      there is still a last chance: try again at any address.
      Hence: */
   if (mreq.rkind == MHint && sr_isError(sres)) {
      mreq.start = 0;
      mreq.len   = arg2;
      mreq.rkind = MAny;
      advised = VG_(am_get_advisory)( &mreq, True/*client*/, &mreq_ok );
      if (!mreq_ok) {
         /* Our request was bounced, so we'd better fail. */
         return VG_(mk_SysRes_Error)( VKI_EINVAL );
      }
      /* and try again with the kernel */
      sres = VG_(am_do_mmap_NO_NOTIFY)(advised, arg2, arg3,
                                       arg4 | VKI_MAP_FIXED,
                                       arg5, arg6);
   }

   if (!sr_isError(sres)) {
      ULong di_handle;
      /* Notify aspacem. */
      notify_core_of_mmap(
         (Addr)sr_Res(sres), /* addr kernel actually assigned */
         arg2, /* length */
         arg3, /* prot */
         arg4, /* the original flags value */
         arg5, /* fd */
         arg6  /* offset */
      );
      /* Load symbols? */
      di_handle = VG_(di_notify_mmap)( (Addr)sr_Res(sres), 
                                       False/*allow_SkFileV*/, (Int)arg5 );
      /* Notify the tool. */
      notify_tool_of_mmap(
         (Addr)sr_Res(sres), /* addr kernel actually assigned */
         arg2, /* length */
         arg3, /* prot */
         di_handle /* so the tool can refer to the read debuginfo later,
                      if it wants. */
      );
   }

   /* Stay sane */
   if (!sr_isError(sres) && (arg4 & VKI_MAP_FIXED))
      vg_assert(sr_Res(sres) == arg1);

   return sres;
}
/* ---------------------------------------------------------------------
   PRE/POST wrappers for mips/Linux-specific syscalls
   ------------------------------------------------------------------ */ 
#define PRE(name)       DEFN_PRE_TEMPLATE(mips_linux, name)
#define POST(name)      DEFN_POST_TEMPLATE(mips_linux, name)

/* Add prototypes for the wrappers declared here, so that gcc doesn't
   harass us for not having prototypes.  Really this is a kludge --
   the right thing to do is to make these wrappers 'static' since they
   aren't visible outside this file, but that requires even more macro
   magic. */ 
//DECL_TEMPLATE (mips_linux, sys_syscall);
DECL_TEMPLATE (mips_linux, sys_mmap);
DECL_TEMPLATE (mips_linux, sys_mmap2);
DECL_TEMPLATE (mips_linux, sys_stat64);
DECL_TEMPLATE (mips_linux, sys_lstat64);
DECL_TEMPLATE (mips_linux, sys_fstatat64);
DECL_TEMPLATE (mips_linux, sys_fstat64);
DECL_TEMPLATE (mips_linux, sys_clone);
DECL_TEMPLATE (mips_linux, sys_sigreturn);
DECL_TEMPLATE (mips_linux, sys_rt_sigreturn);
DECL_TEMPLATE (mips_linux, sys_cacheflush);
DECL_TEMPLATE (mips_linux, sys_set_thread_area);
DECL_TEMPLATE (mips_linux, sys_pipe);

PRE(sys_mmap2) 
{
  /* Exactly like sys_mmap() except the file offset is specified in pagesize
     units rather than bytes, so that it can be used for files bigger than
     2^32 bytes. */
  SysRes r;
  PRINT("sys_mmap2 ( %#lx, %llu, %ld, %ld, %ld, %ld )", ARG1, (ULong) ARG2,
                                                        ARG3, ARG4, ARG5, ARG6);
  PRE_REG_READ6(long, "mmap2", unsigned long, start, unsigned long, length,
                unsigned long, prot, unsigned long, flags,
                unsigned long, fd, unsigned long, offset);
  r = mips_PRE_sys_mmap(tid, ARG1, ARG2, ARG3, ARG4, ARG5,
                        VKI_PAGE_SIZE * (Off64T) ARG6);
  SET_STATUS_from_SysRes(r);
} 

PRE(sys_mmap) 
{
  SysRes r;
  PRINT("sys_mmap ( %#lx, %llu, %lu, %lu, %lu, %ld )", ARG1, (ULong) ARG2,
                                                       ARG3, ARG4, ARG5, ARG6);
  PRE_REG_READ6(long, "mmap", unsigned long, start, vki_size_t, length,
                int, prot, int, flags, int, fd, unsigned long, offset);
  r = mips_PRE_sys_mmap(tid, ARG1, ARG2, ARG3, ARG4, ARG5, (Off64T) ARG6);
  SET_STATUS_from_SysRes(r);
} 

// XXX: lstat64/fstat64/stat64 are generic, but not necessarily
// applicable to every architecture -- I think only to 32-bit archs.
// We're going to need something like linux/core_os32.h for such
// things, eventually, I think.  --njn
 
PRE (sys_lstat64) 
{
  PRINT ("sys_lstat64 ( %#lx(%s), %#lx )", ARG1, (char *) ARG1, ARG2);
  PRE_REG_READ2 (long, "lstat64", char *, file_name, struct stat64 *, buf);
  PRE_MEM_RASCIIZ ("lstat64(file_name)", ARG1);
  PRE_MEM_WRITE ("lstat64(buf)", ARG2, sizeof (struct vki_stat64));
} 

POST (sys_lstat64) 
{
  vg_assert (SUCCESS);
  if (RES == 0)
    {
      POST_MEM_WRITE (ARG2, sizeof (struct vki_stat64));
    }
} 

PRE (sys_stat64) 
{
  PRINT ("sys_stat64 ( %#lx(%s), %#lx )", ARG1, (char *) ARG1, ARG2);
  PRE_REG_READ2 (long, "stat64", char *, file_name, struct stat64 *, buf);
  PRE_MEM_RASCIIZ ("stat64(file_name)", ARG1);
  PRE_MEM_WRITE ("stat64(buf)", ARG2, sizeof (struct vki_stat64));
}

POST (sys_stat64)
{
  POST_MEM_WRITE (ARG2, sizeof (struct vki_stat64));
}

PRE (sys_fstatat64)
{
  PRINT ("sys_fstatat64 ( %ld, %#lx(%s), %#lx )", ARG1, ARG2, (char *) ARG2,
                                                  ARG3);
  PRE_REG_READ3 (long, "fstatat64", int, dfd, char *, file_name,
                 struct stat64 *, buf);
  PRE_MEM_RASCIIZ ("fstatat64(file_name)", ARG2);
  PRE_MEM_WRITE ("fstatat64(buf)", ARG3, sizeof (struct vki_stat64));
}

POST (sys_fstatat64)
{
  POST_MEM_WRITE (ARG3, sizeof (struct vki_stat64));
}

PRE (sys_fstat64)
{
  PRINT ("sys_fstat64 ( %ld, %#lx )", ARG1, ARG2);
  PRE_REG_READ2 (long, "fstat64", unsigned long, fd, struct stat64 *, buf);
  PRE_MEM_WRITE ("fstat64(buf)", ARG2, sizeof (struct vki_stat64));
}

POST (sys_fstat64)
{
  POST_MEM_WRITE (ARG2, sizeof (struct vki_stat64));
} 

PRE (sys_clone) 
  {
    Bool badarg = False;
    UInt cloneflags;
    PRINT ("sys_clone ( %lx, %#lx, %#lx, %#lx, %#lx )", ARG1, ARG2, ARG3,
                                                        ARG4, ARG5);
    PRE_REG_READ2 (int, "clone", unsigned long, flags,  void *, child_stack);
    if (ARG1 & VKI_CLONE_PARENT_SETTID)
      {
        if (VG_ (tdict).track_pre_reg_read)
          {
            PRA3 ("clone", int *, parent_tidptr);
          }
        PRE_MEM_WRITE ("clone(parent_tidptr)", ARG3, sizeof (Int));
        if (!VG_ (am_is_valid_for_client)(ARG3, sizeof (Int), VKI_PROT_WRITE))
        {
          badarg = True;
        }
      }
    if (ARG1 & (VKI_CLONE_CHILD_SETTID | VKI_CLONE_CHILD_CLEARTID))
      {
        if (VG_ (tdict).track_pre_reg_read)
          {
            PRA5 ("clone", int *, child_tidptr);
          }
        PRE_MEM_WRITE ("clone(child_tidptr)", ARG5, sizeof (Int));
        if (!VG_ (am_is_valid_for_client)(ARG5, sizeof (Int), VKI_PROT_WRITE))
          {
            badarg = True;
          }
      }
    if (badarg)
      {
        SET_STATUS_Failure (VKI_EFAULT);
        return;
      }
    cloneflags = ARG1;
    if (!ML_ (client_signal_OK) (ARG1 & VKI_CSIGNAL))
      {
        SET_STATUS_Failure (VKI_EINVAL);
        return;
      }
    /* Only look at the flags we really care about */ 
    switch (cloneflags & (VKI_CLONE_VM | VKI_CLONE_FS
           |VKI_CLONE_FILES | VKI_CLONE_VFORK))
      {
        case VKI_CLONE_VM | VKI_CLONE_FS | VKI_CLONE_FILES:
        /* thread creation */ 
        PRINT ("sys_clone1 ( %#lx, %#lx, %#lx, %#lx, %#lx )",
               ARG1, ARG2, ARG3, ARG4, ARG5);
        SET_STATUS_from_SysRes (do_clone (tid, 
                                          ARG1, /* flags */ 
                                          (Addr) ARG2, /* child SP */ 
                                          (Int *) ARG3, /* parent_tidptr */ 
                                          (Int *) ARG5, /* child_tidptr */ 
                                          (Addr) ARG4));	/* child_tls */

        break;
        case VKI_CLONE_VFORK | VKI_CLONE_VM:	/* vfork */
          /* FALLTHROUGH - assume vfork == fork */ 
          cloneflags &= ~(VKI_CLONE_VFORK | VKI_CLONE_VM);
        case 0:  /* plain fork */
          SET_STATUS_from_SysRes (ML_ (do_fork_clone) (tid,
                                  cloneflags, /* flags */ 
                                  (Int *) ARG3, /* parent_tidptr */ 
                                  (Int *) ARG5));	/* child_tidptr */
        break;
        default:
          /* should we just ENOSYS? */ 
          VG_ (message) (Vg_UserMsg, "Unsupported clone() flags: 0x%lx\n", ARG1);
          VG_ (message) (Vg_UserMsg, "\n");
          VG_ (message) (Vg_UserMsg, "The only supported clone() uses are:\n");
          VG_ (message) (Vg_UserMsg, 
                          " - via a threads library (LinuxThreads or NPTL)\n");
          VG_ (message) (Vg_UserMsg,
                          " - via the implementation of fork or vfork\n");
          VG_ (unimplemented)("Valgrind does not support general clone().");
    }
    if (SUCCESS)
      {
        if (ARG1 & VKI_CLONE_PARENT_SETTID)
          POST_MEM_WRITE (ARG3, sizeof (Int));
        if (ARG1 & (VKI_CLONE_CHILD_SETTID | VKI_CLONE_CHILD_CLEARTID))
          POST_MEM_WRITE (ARG5, sizeof (Int));
        /* Thread creation was successful; let the child have the chance 
         * to run */
        *flags |= SfYieldAfter;
      }
}

PRE (sys_sigreturn) 
{
  PRINT ("sys_sigreturn ( )");
  vg_assert (VG_ (is_valid_tid) (tid));
  vg_assert (tid >= 1 && tid < VG_N_THREADS);
  vg_assert (VG_ (is_running_thread) (tid));
  VG_ (sigframe_destroy) (tid, False);
  /* Tell the driver not to update the guest state with the "result",
     and set a bogus result to keep it happy. */ 
  *flags |= SfNoWriteResult;
  SET_STATUS_Success (0);
   /* Check to see if any signals arose as a result of this. */ 
  *flags |= SfPollAfter;
}

PRE (sys_rt_sigreturn) 
{
  PRINT ("rt_sigreturn ( )");
  vg_assert (VG_ (is_valid_tid) (tid));
  vg_assert (tid >= 1 && tid < VG_N_THREADS);
  vg_assert (VG_ (is_running_thread) (tid));
  /* Restore register state from frame and remove it */ 
  VG_ (sigframe_destroy) (tid, True);
  /* Tell the driver not to update the guest state with the "result",
     and set a bogus result to keep it happy. */ 
  *flags |= SfNoWriteResult;
  SET_STATUS_Success (0);
  /* Check to see if any signals arose as a result of this. */ 
  *flags |= SfPollAfter;
}

PRE (sys_set_thread_area) 
{
   PRINT ("set_thread_area (%lx)", ARG1);
   PRE_REG_READ1(long, "set_thread_area", unsigned long, addr);
   SET_STATUS_from_SysRes( sys_set_tls( tid, ARG1 ) );
}

/* Very much MIPS specific */
PRE (sys_cacheflush)
{
  PRINT ("cacheflush (%lx, %lx, %lx)", ARG1, ARG2, ARG3);
  PRE_REG_READ3(long, "cacheflush", unsigned long, addr,
                int, nbytes, int, cache);
  VG_ (discard_translations) ((Addr)ARG1, (ULong) ARG2,
                              "PRE(sys_cacheflush)");
  SET_STATUS_Success (0);
}

PRE(sys_pipe)
{
   PRINT("sys_pipe ( %#lx )", ARG1);
   PRE_REG_READ1(int, "pipe", int *, filedes);
   PRE_MEM_WRITE( "pipe(filedes)", ARG1, 2*sizeof(int) );
}

POST(sys_pipe)
{
   Int p0, p1;
   vg_assert(SUCCESS);
   p0 = RES;
   p1 = sr_ResEx(status->sres);

   if (!ML_(fd_allowed)(p0, "pipe", tid, True) ||
       !ML_(fd_allowed)(p1, "pipe", tid, True)) {
      VG_(close)(p0);
      VG_(close)(p1);
      SET_STATUS_Failure( VKI_EMFILE );
   } else {
      if (VG_(clo_track_fds)) {
         ML_(record_fd_open_nameless)(tid, p0);
         ML_(record_fd_open_nameless)(tid, p1);
      }
   }
}

#undef PRE
#undef POST

/* ---------------------------------------------------------------------
   The mips/Linux syscall table
   ------------------------------------------------------------------ */ 
#define PLAX_(sysno, name)    WRAPPER_ENTRY_X_(mips_linux, sysno, name) 
#define PLAXY(sysno, name)    WRAPPER_ENTRY_XY(mips_linux, sysno, name)

// This table maps from __NR_xxx syscall numbers (from
// linux/include/asm-mips/unistd.h) to the appropriate PRE/POST sys_foo()
// wrappers on mips (as per sys_call_table in linux/arch/mips/kernel/entry.S).
//

// For those syscalls not handled by Valgrind, the annotation indicate its
// arch/OS combination, eg. */* (generic), */Linux (Linux only), ?/?
// (unknown).

static SyscallTableEntry syscall_main_table[] = {
   //..    PLAXY (__NR_syscall,                sys_syscall),            // 0
   GENX_ (__NR_exit,                   sys_exit),                    // 1
   GENX_ (__NR_fork,                   sys_fork),                    // 2
   GENXY (__NR_read,                   sys_read),                    // 3
   GENX_ (__NR_write,                  sys_write),                   // 4
   GENXY (__NR_open,                   sys_open),                    // 5
   GENXY (__NR_close,                  sys_close),                   // 6
   GENXY (__NR_waitpid,                sys_waitpid),                 // 7
   GENXY (__NR_creat,                  sys_creat),                   // 8
   GENX_ (__NR_link,                   sys_link),                    // 9
   GENX_ (__NR_unlink,                 sys_unlink),                  // 10
   GENX_ (__NR_execve,                 sys_execve),                  // 11
   GENX_ (__NR_chdir,                  sys_chdir),                   // 12
   GENXY (__NR_time,                   sys_time),                    // 13
   GENX_ (__NR_mknod,                  sys_mknod),                   // 14
   GENX_ (__NR_chmod,                  sys_chmod),                   // 15
   GENX_ (__NR_lchown,                 sys_lchown),                  // 16
   //..
   LINX_ (__NR_lseek,                  sys_lseek),                   // 19
   GENX_ (__NR_getpid,                 sys_getpid),                  // 20
   LINX_ (__NR_mount,                  sys_mount),                   // 21
   LINX_ (__NR_umount,                 sys_oldumount),               // 22
   GENX_ (__NR_setuid,                 sys_setuid),                  // 23
   GENX_ (__NR_getuid,                 sys_getuid),                  // 24
   LINX_ (__NR_stime,                  sys_stime),                   // 25
   //..    PLAXY(__NR_ptrace,            sys_ptrace),            // 26
   GENX_ (__NR_alarm,                  sys_alarm),                   // 27
   //..    //   (__NR_oldfstat,          sys_fstat),  // 28
   GENX_ (__NR_pause,                  sys_pause),                   // 29
   LINX_ (__NR_utime,                  sys_utime),                   // 30
   //..    GENX_(__NR_stty,              sys_ni_syscall),        // 31
   //..    GENX_(__NR_gtty,              sys_ni_syscall),        // 32
   GENX_ (__NR_access,                 sys_access),                  // 33
   //..    GENX_(__NR_nice,              sys_nice),              // 34
   //..    GENX_(__NR_ftime,             sys_ni_syscall),        // 35
   //..    GENX_(__NR_sync,              sys_sync),              // 36
   GENX_ (__NR_kill,                   sys_kill),                    // 37
   GENX_ (__NR_rename,                 sys_rename),                  // 38
   GENX_ (__NR_mkdir,                  sys_mkdir),                   // 39
   GENX_ (__NR_rmdir,                  sys_rmdir),                   // 40
   GENXY (__NR_dup,                    sys_dup),                     // 41
   PLAXY (__NR_pipe,                   sys_pipe),                    // 42
   GENXY (__NR_times,                  sys_times),                   // 43
   //..    GENX_(__NR_prof,              sys_ni_syscall),   // 44
   GENX_ (__NR_brk,                    sys_brk),                     // 45
   GENX_ (__NR_setgid,                 sys_setgid),                  // 46
   GENX_ (__NR_getgid,                 sys_getgid),                  // 47
   //..    //   (__NR_signal,            sys_signal),       // 48
   GENX_ (__NR_geteuid,                sys_geteuid),                 // 49
   GENX_ (__NR_getegid,                sys_getegid),                 // 50
   //..    GENX_(__NR_acct,              sys_acct),         // 51
   LINX_ (__NR_umount2,                sys_umount),                  // 52
   //..    GENX_(__NR_lock,              sys_ni_syscall),   // 53
   LINXY (__NR_ioctl,                  sys_ioctl),                   // 54
   LINXY (__NR_fcntl,                  sys_fcntl),                   // 55
   //..    GENX_(__NR_mpx,               sys_ni_syscall),   // 56
   GENX_ (__NR_setpgid,                sys_setpgid),                 // 57
   //..    GENX_(__NR_ulimit,            sys_ni_syscall),        // 58
   //..    //   (__NR_oldolduname,       sys_olduname),          // 59
   GENX_ (__NR_umask,                  sys_umask),                   // 60
   GENX_ (__NR_chroot,                 sys_chroot),                  // 61
   //..    //   (__NR_ustat,             sys_ustat)              // 62
   GENXY (__NR_dup2,                   sys_dup2),                    // 63
   GENX_ (__NR_getppid,                sys_getppid),                 // 64
   GENX_ (__NR_getpgrp,                sys_getpgrp),                 // 65
   GENX_ (__NR_setsid,                 sys_setsid),                  // 66
   LINXY (__NR_sigaction,              sys_sigaction),               // 67
   //..    //   (__NR_sgetmask,          sys_sgetmask),          // 68
   //..    //   (__NR_ssetmask,          sys_ssetmask),          // 69
   GENX_ (__NR_setreuid,               sys_setreuid),                // 70
   GENX_ (__NR_setregid,               sys_setregid),                // 71
   //   PLAX_(__NR_sigsuspend,        sys_sigsuspend),        // 72
   LINXY (__NR_sigpending,             sys_sigpending),              // 73
   //..    //   (__NR_sethostname,       sys_sethostname),       // 74
   GENX_ (__NR_setrlimit,              sys_setrlimit),               // 75
   GENXY (__NR_getrlimit,              sys_getrlimit),               // 76
   GENXY (__NR_getrusage,              sys_getrusage),               // 77
   GENXY (__NR_gettimeofday,           sys_gettimeofday),            // 78
   GENX_ (__NR_settimeofday,           sys_settimeofday),            // 79
   GENXY (__NR_getgroups,              sys_getgroups),               // 80
   GENX_ (__NR_setgroups,              sys_setgroups),               // 81
   //..    PLAX_(__NR_select,            old_select),            // 82
   GENX_ (__NR_symlink,                sys_symlink),                 // 83
   //..    //   (__NR_oldlstat,          sys_lstat),             // 84
   GENX_ (__NR_readlink,               sys_readlink),                // 85
   //..    //   (__NR_uselib,            sys_uselib),            // 86
   //..    //   (__NR_swapon,            sys_swapon),            // 87
   //..    //   (__NR_reboot,            sys_reboot),            // 88
   //..    //   (__NR_readdir,           old_readdir),           // 89
   PLAX_ (__NR_mmap,                   sys_mmap),                    // 90
   GENXY (__NR_munmap,                 sys_munmap),                  // 91
   GENX_ (__NR_truncate,               sys_truncate),                // 92
   GENX_ (__NR_ftruncate,              sys_ftruncate),               // 93
   GENX_ (__NR_fchmod,                 sys_fchmod),                  // 94
   GENX_ (__NR_fchown,                 sys_fchown),                  // 95
   GENX_ (__NR_getpriority,            sys_getpriority),             // 96
   GENX_ (__NR_setpriority,            sys_setpriority),             // 97
   //..    GENX_(__NR_profil,            sys_ni_syscall),        // 98
   GENXY (__NR_statfs,                 sys_statfs),                  // 99
   GENXY (__NR_fstatfs,                sys_fstatfs),                 // 100
   //..    LINX_(__NR_ioperm,            sys_ioperm),            // 101
   LINXY (__NR_socketcall,             sys_socketcall),              // 102
   LINXY (__NR_syslog,                 sys_syslog),                  // 103
   GENXY (__NR_setitimer,              sys_setitimer),               // 104
   //..    GENXY(__NR_getitimer,         sys_getitimer),         // 105
   GENXY (__NR_stat,                   sys_newstat),                 // 106
   GENXY (__NR_lstat,                  sys_newlstat),                // 107
   GENXY (__NR_fstat,                  sys_newfstat),                // 108
   //..    //   (__NR_olduname,          sys_uname),             // 109
   //..    GENX_(__NR_iopl,              sys_iopl),              // 110
   //..    LINX_(__NR_vhangup,           sys_vhangup),           // 111
   //..    GENX_(__NR_idle,              sys_ni_syscall),        // 112
   //..    //   (__NR_vm86old,           sys_vm86old),           // 113
   GENXY (__NR_wait4,                  sys_wait4),                   // 114
   //..    //   (__NR_swapoff,           sys_swapoff),           // 115
   LINXY (__NR_sysinfo,                sys_sysinfo),                 // 116
   LINXY (__NR_ipc,                    sys_ipc),                     // 117
   GENX_ (__NR_fsync,                  sys_fsync),                   // 118
   PLAX_ (__NR_sigreturn,              sys_sigreturn),               // 119
   PLAX_ (__NR_clone,                  sys_clone),                   // 120
   //..    //   (__NR_setdomainname,     sys_setdomainname),     // 121
   GENXY (__NR_uname,                  sys_newuname),                // 122
   //..    PLAX_(__NR_modify_ldt,        sys_modify_ldt),        // 123
   //..    LINXY(__NR_adjtimex,          sys_adjtimex),          // 124
   GENXY (__NR_mprotect,               sys_mprotect),                // 125
   LINXY (__NR_sigprocmask,            sys_sigprocmask),             // 126
   //..    GENX_(__NR_create_module,     sys_ni_syscall),        // 127
   //..    GENX_(__NR_init_module,       sys_init_module),       // 128
   //..    //   (__NR_delete_module,     sys_delete_module),     // 129
   //..    GENX_(__NR_get_kernel_syms,   sys_ni_syscall),        // 130
   //..    LINX_(__NR_quotactl,          sys_quotactl),          // 131
   GENX_ (__NR_getpgid,                sys_getpgid),                 // 132
   GENX_ (__NR_fchdir,                 sys_fchdir),                  // 133
   //..    //   (__NR_bdflush,           sys_bdflush),           // 134
   //..    //   (__NR_sysfs,             sys_sysfs),             // 135
   LINX_ (__NR_personality,            sys_personality),            // 136
   //..    GENX_(__NR_afs_syscall,       sys_ni_syscall),        // 137
   LINX_ (__NR_setfsuid,               sys_setfsuid),                // 138
   LINX_ (__NR_setfsgid,               sys_setfsgid),                // 139
   LINXY (__NR__llseek,                sys_llseek),                  // 140
   GENXY (__NR_getdents,               sys_getdents),                // 141
   GENX_ (__NR__newselect,             sys_select),                  // 142
   GENX_ (__NR_flock,                  sys_flock),                   // 143
   GENX_ (__NR_msync,                  sys_msync),                   // 144
   GENXY (__NR_readv,                  sys_readv),                   // 145
   GENX_ (__NR_writev,                 sys_writev),                  // 146
   PLAX_ (__NR_cacheflush,             sys_cacheflush),              // 147
   GENX_ (__NR_getsid,                 sys_getsid),                  // 151
   GENX_ (__NR_fdatasync,              sys_fdatasync),               // 152
   LINXY (__NR__sysctl,                sys_sysctl),                  // 153
   GENX_ (__NR_mlock,                  sys_mlock),                   // 154
   GENX_ (__NR_munlock,                sys_munlock),                 // 155
   GENX_ (__NR_mlockall,               sys_mlockall),                // 156
   LINX_ (__NR_munlockall,             sys_munlockall),              // 157
   //..    LINXY(__NR_sched_setparam,    sys_sched_setparam),    // 158
   LINXY (__NR_sched_getparam,         sys_sched_getparam),          // 159
   LINX_ (__NR_sched_setscheduler,     sys_sched_setscheduler),      // 160
   LINX_ (__NR_sched_getscheduler,     sys_sched_getscheduler),      // 161
   LINX_ (__NR_sched_yield,            sys_sched_yield),             // 162
   LINX_ (__NR_sched_get_priority_max, sys_sched_get_priority_max),  // 163
   LINX_ (__NR_sched_get_priority_min, sys_sched_get_priority_min),  // 164
   //.. //LINX?(__NR_sched_rr_get_interval,  sys_sched_rr_get_interval), // 165
   GENXY (__NR_nanosleep,              sys_nanosleep),               // 166
   GENX_ (__NR_mremap,                 sys_mremap),                  // 167
   LINXY (__NR_accept,                 sys_accept),                  // 168
   LINX_ (__NR_bind,                   sys_bind),                    // 169
   LINX_ (__NR_connect,                sys_connect),                 // 170
   LINXY (__NR_getpeername,            sys_getpeername),             // 171
   LINXY (__NR_getsockname,            sys_getsockname),             // 172
   LINXY (__NR_getsockopt,             sys_getsockopt),              // 173
   LINX_ (__NR_listen,                 sys_listen),                  // 174
   LINXY (__NR_recv,                   sys_recv),                    // 175
   LINXY (__NR_recvfrom,               sys_recvfrom),                // 176
   LINXY (__NR_recvmsg,                sys_recvmsg),                 // 177
   LINX_ (__NR_send,                   sys_send),                    // 178
   LINX_ (__NR_sendmsg,                sys_sendmsg),                 // 179
   LINX_ (__NR_sendto,                 sys_sendto),                  // 180
   LINX_ (__NR_setsockopt,             sys_setsockopt),              // 181
   LINX_ (__NR_shutdown,               sys_shutdown),                // 182
   LINXY (__NR_socket,                 sys_socket),                  // 183
   LINXY (__NR_socketpair,             sys_socketpair),              // 184
   LINX_ (__NR_setresuid,              sys_setresuid),               // 185
   LINXY (__NR_getresuid,              sys_getresuid),               // 186
   //..    GENX_(__NR_query_module,      sys_ni_syscall),        // 187
   GENXY (__NR_poll,                   sys_poll),                    // 188
   //..
   LINX_ (__NR_setresgid,              sys_setresgid),               // 190
   LINXY (__NR_getresgid,              sys_getresgid),               // 191
   LINXY (__NR_prctl,                  sys_prctl),                   // 192
   PLAX_ (__NR_rt_sigreturn,           sys_rt_sigreturn),            // 193
   LINXY (__NR_rt_sigaction,           sys_rt_sigaction),            // 194
   LINXY (__NR_rt_sigprocmask,         sys_rt_sigprocmask),          // 195
   LINXY (__NR_rt_sigpending,          sys_rt_sigpending),           // 196
   LINXY (__NR_rt_sigtimedwait,        sys_rt_sigtimedwait),         // 197
   LINXY (__NR_rt_sigqueueinfo,        sys_rt_sigqueueinfo),         // 198
   LINX_ (__NR_rt_sigsuspend,          sys_rt_sigsuspend),           // 199
   GENXY (__NR_pread64,                sys_pread64),                 // 200
   GENX_ (__NR_pwrite64,               sys_pwrite64),                // 201
   GENX_ (__NR_chown,                  sys_chown),                   // 202
   GENXY (__NR_getcwd,                 sys_getcwd),                  // 203
   LINXY (__NR_capget,                 sys_capget),                  // 204
   //..    LINX_(__NR_capset,            sys_capset),            // 205
   GENXY (__NR_sigaltstack,            sys_sigaltstack),             // 206
   LINXY (__NR_sendfile,               sys_sendfile),                // 207
   //..    GENXY(__NR_getpmsg,           sys_getpmsg),           // 208
   //..    GENX_(__NR_putpmsg,           sys_putpmsg),           // 209
   PLAX_ (__NR_mmap2,                  sys_mmap2),                   // 210
   //   GENX_(__NR_truncate64,        sys_truncate64),        // 211
   GENX_ (__NR_ftruncate64,            sys_ftruncate64),             // 212
   PLAXY (__NR_stat64,                 sys_stat64),                  // 213
   PLAXY (__NR_lstat64,                sys_lstat64),                 // 214
   PLAXY (__NR_fstat64,                sys_fstat64),                 // 215
   //..
   GENXY (__NR_mincore,                sys_mincore),                 // 217
   GENX_ (__NR_madvise,                sys_madvise),                 // 218
   GENXY (__NR_getdents64,             sys_getdents64),              // 219
   LINXY (__NR_fcntl64,                sys_fcntl64),                 // 220
   //..
   LINX_ (__NR_gettid,                 sys_gettid),                  // 222
   //..
   LINXY (__NR_getxattr,               sys_getxattr),                // 227
   LINXY (__NR_lgetxattr,              sys_lgetxattr),               // 228
   LINXY (__NR_fgetxattr,              sys_fgetxattr),               // 229
   LINXY (__NR_listxattr,              sys_listxattr),               // 230
   LINXY (__NR_llistxattr,             sys_llistxattr),              // 231
   LINXY (__NR_flistxattr,             sys_flistxattr),              // 232
   LINX_ (__NR_removexattr,            sys_removexattr),             // 233
   LINX_ (__NR_lremovexattr,           sys_lremovexattr),            // 234
   LINX_ (__NR_fremovexattr,           sys_fremovexattr),            // 235
   //..
   LINXY (__NR_sendfile64,             sys_sendfile64),              // 237
   LINXY (__NR_futex,                  sys_futex),                   // 238
   LINX_ (__NR_sched_setaffinity,      sys_sched_setaffinity),       // 239
   LINXY (__NR_sched_getaffinity,      sys_sched_getaffinity),       // 240
   LINX_ (__NR_io_setup,               sys_io_setup),                // 241
   LINX_ (__NR_io_destroy,             sys_io_destroy),              // 242
   LINXY (__NR_io_getevents,           sys_io_getevents),            // 243
   LINX_ (__NR_io_submit,              sys_io_submit),               // 244
   LINXY (__NR_io_cancel,              sys_io_cancel),               // 245
   LINX_ (__NR_exit_group,             sys_exit_group),              // 246
   //..
   LINXY (__NR_epoll_create,           sys_epoll_create),            // 248
   LINX_ (__NR_epoll_ctl,              sys_epoll_ctl),               // 249
   LINXY (__NR_epoll_wait,             sys_epoll_wait),              // 250
   //..
   LINX_ (__NR_set_tid_address,        sys_set_tid_address),         // 252
   LINX_ (__NR_fadvise64,              sys_fadvise64),               // 254
   GENXY (__NR_statfs64,               sys_statfs64),                // 255
   GENXY (__NR_fstatfs64,              sys_fstatfs64),               // 256
   //..
   LINXY (__NR_timer_create,           sys_timer_create),            // 257
   LINXY (__NR_timer_settime,          sys_timer_settime),           // 258
   LINXY (__NR_timer_gettime,          sys_timer_gettime),           // 259
   LINX_ (__NR_timer_getoverrun,       sys_timer_getoverrun),        // 260
   LINX_ (__NR_timer_delete,           sys_timer_delete),            // 261
   LINX_ (__NR_clock_settime,          sys_clock_settime),           // 262
   LINXY (__NR_clock_gettime,          sys_clock_gettime),           // 263
   LINXY (__NR_clock_getres,           sys_clock_getres),            // 264
   LINXY (__NR_clock_nanosleep,        sys_clock_nanosleep),         // 265
   LINXY (__NR_tgkill,                 sys_tgkill),                  // 266
   //..    GENX_(__NR_utimes,            sys_utimes),            // 267
   LINXY (__NR_get_mempolicy,          sys_get_mempolicy),           // 269
   LINX_ (__NR_set_mempolicy,          sys_set_mempolicy),           // 270
   LINXY (__NR_mq_open,                sys_mq_open),                 // 271
   LINX_ (__NR_mq_unlink,              sys_mq_unlink),               // 272
   LINX_ (__NR_mq_timedsend,           sys_mq_timedsend),            // 273
   LINXY (__NR_mq_timedreceive,        sys_mq_timedreceive),         // 274
   LINX_ (__NR_mq_notify,              sys_mq_notify),               // 275
   LINXY (__NR_mq_getsetattr,          sys_mq_getsetattr),           // 276
   LINX_ (__NR_inotify_init,           sys_inotify_init),            // 275
   LINX_ (__NR_inotify_add_watch,      sys_inotify_add_watch),       // 276
   LINX_ (__NR_inotify_rm_watch,       sys_inotify_rm_watch),        // 277
   //..
   PLAX_ (__NR_set_thread_area,        sys_set_thread_area),         // 283
   //..
   LINXY (__NR_openat,                 sys_openat),                  // 288
   LINX_ (__NR_mkdirat,                sys_mkdirat),                 // 289
   LINX_ (__NR_mknodat,                sys_mknodat),                 // 290
   LINX_ (__NR_fchownat,               sys_fchownat),                // 291
   LINX_ (__NR_futimesat,              sys_futimesat),               // 292
   PLAXY (__NR_fstatat64,              sys_fstatat64),               // 293
   LINX_ (__NR_unlinkat,               sys_unlinkat),                // 294
   LINX_ (__NR_renameat,               sys_renameat),                // 295
   LINX_ (__NR_linkat,                 sys_linkat),                  // 296
   LINX_ (__NR_symlinkat,              sys_symlinkat),               // 297
   LINX_ (__NR_readlinkat,             sys_readlinkat),              // 298
   LINX_ (__NR_fchmodat,               sys_fchmodat),                // 299
   LINX_ (__NR_faccessat,              sys_faccessat),               // 300
   //..
   LINXY (__NR_ppoll,                  sys_ppoll),                   // 302
   //..
   LINX_ (__NR_set_robust_list,        sys_set_robust_list),         // 309
   LINXY (__NR_get_robust_list,        sys_get_robust_list),         // 310
   //..
   LINXY (__NR_epoll_pwait,            sys_epoll_pwait),             // 313
   //..
   LINX_ (__NR_utimensat,              sys_utimensat),               // 316
   //..
   LINX_ (__NR_fallocate,              sys_fallocate),               // 320
   LINXY (__NR_timerfd_create,         sys_timerfd_create),          // 321
   LINXY (__NR_timerfd_gettime,        sys_timerfd_gettime),         // 322
   LINXY (__NR_timerfd_settime,        sys_timerfd_settime),         // 323
   LINXY (__NR_signalfd4,              sys_signalfd4),               // 324
   LINXY (__NR_eventfd2,               sys_eventfd2),                // 325
   //..
   LINXY (__NR_pipe2,                  sys_pipe2),                   // 328
   LINXY (__NR_inotify_init1,          sys_inotify_init1),           // 329
   //..
   LINXY (__NR_prlimit64,              sys_prlimit64),               // 338
   //..
   LINXY (__NR_clock_adjtime,          sys_clock_adjtime),           // 341
   LINX_ (__NR_syncfs,                 sys_syncfs),                  // 342
   //..
   LINXY (__NR_process_vm_readv,       sys_process_vm_readv),        // 345
   LINX_ (__NR_process_vm_writev,      sys_process_vm_writev),       // 346
   //..
   LINXY(__NR_getrandom,               sys_getrandom),               // 353
   LINXY(__NR_memfd_create,            sys_memfd_create)             // 354
};

SyscallTableEntry* ML_(get_linux_syscall_entry) (UInt sysno)
{
   const UInt syscall_main_table_size
               = sizeof (syscall_main_table) / sizeof (syscall_main_table[0]);
   /* Is it in the contiguous initial section of the table? */
   if (sysno < syscall_main_table_size) {
      SyscallTableEntry * sys = &syscall_main_table[sysno];
      if (sys->before == NULL)
         return NULL;  /* No entry. */
      else
         return sys;
   }
   /* Can't find a wrapper. */
   return NULL;
}

#endif // defined(VGP_mips32_linux)

/*--------------------------------------------------------------------*/ 
/*--- end                                     syswrap-mips-linux.c ---*/ 
/*--------------------------------------------------------------------*/