
/*--------------------------------------------------------------------*/
/*--- Platform-specific syscalls stuff.    syswrap-arm64-linux.c -----*/
/*--------------------------------------------------------------------*/

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

   Copyright (C) 2013-2013 OpenWorks
      info@open-works.net

   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_arm64_linux)

#include "pub_core_basics.h"
#include "pub_core_vki.h"
#include "pub_core_vkiscnums.h"
#include "pub_core_libcsetjmp.h"    // to keep _threadstate.h happy
#include "pub_core_threadstate.h"
#include "pub_core_aspacemgr.h"
//ZZ #include "pub_core_debuglog.h"
//ZZ #include "pub_core_libcbase.h"
#include "pub_core_libcassert.h"
#include "pub_core_libcprint.h"
//ZZ #include "pub_core_libcproc.h"
//ZZ #include "pub_core_libcsignal.h"
#include "pub_core_options.h"
//ZZ #include "pub_core_scheduler.h"
#include "pub_core_sigframe.h"      // For VG_(sigframe_destroy)()
//ZZ #include "pub_core_signals.h"
#include "pub_core_syscall.h"
#include "pub_core_syswrap.h"
#include "pub_core_tooliface.h"
//ZZ #include "pub_core_stacks.h"        // VG_(register_stack)
//ZZ #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 */
//ZZ #include "priv_syswrap-main.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 );
//    r0 = stack
//    r1 = retaddr
//    r2 = f
//    r3 = arg1
asm(
".text\n"
".globl vgModuleLocal_call_on_new_stack_0_1\n"
"vgModuleLocal_call_on_new_stack_0_1:\n"
"   mov    sp, x0\n\t" /* Stack pointer */
"   mov    x30, x1\n\t" /* Return address (x30 is LR) */
"   mov    x0, x3\n\t" /* First argument */
"   mov    x9, x2\n\t" /* 'f': x9 won't be zeroed at start of f.  Oh well. */
"   mov    x1, #0\n\t" /* Clear our GPRs */
"   mov    x2, #0\n\t"
"   mov    x3, #0\n\t"
"   mov    x4, #0\n\t"
"   mov    x5, #0\n\t"
"   mov    x6, #0\n\t"
"   mov    x7, #0\n\t"
"   mov    x8, #0\n\t"
/* don't zero out x9 */
"   mov    x10, #0\n\t"
"   mov    x11, #0\n\t"
"   mov    x12, #0\n\t"
"   mov    x13, #0\n\t"
"   mov    x14, #0\n\t"
"   mov    x15, #0\n\t"
"   mov    x16, #0\n\t"
"   mov    x17, #0\n\t"
"   mov    x18, #0\n\t"
"   mov    x19, #0\n\t"
"   mov    x20, #0\n\t"
"   mov    x21, #0\n\t"
"   mov    x22, #0\n\t"
"   mov    x23, #0\n\t"
"   mov    x24, #0\n\t"
"   mov    x25, #0\n\t"
"   mov    x26, #0\n\t"
"   mov    x27, #0\n\t"
"   mov    x28, #0\n\t"
"   mov    x29, sp\n\t" /* FP = SP, in the absence of better suggestions */
"   br     x9\n\t"
".previous\n"
);


//ZZ #define __NR_CLONE        VG_STRINGIFY(__NR_clone)
//ZZ #define __NR_EXIT         VG_STRINGIFY(__NR_exit)
//ZZ 
//ZZ extern
//ZZ ULong do_syscall_clone_arm_linux   ( Word (*fn)(void *), 
//ZZ                                      void* stack, 
//ZZ                                      Int   flags, 
//ZZ                                      void* arg,
//ZZ                                      Int*  child_tid,
//ZZ                                      Int*  parent_tid,
//ZZ                                      void* tls );
//ZZ asm(
//ZZ ".text\n"
//ZZ ".globl do_syscall_clone_arm_linux\n"
//ZZ "do_syscall_clone_arm_linux:\n"
//ZZ 
//ZZ /*Setup child stack */
//ZZ "   str     r0, [r1, #-4]!\n"
//ZZ "   str     r3, [r1, #-4]!\n"
//ZZ "   push {r4,r7}\n" 
//ZZ "   mov r0, r2\n" /* arg1: flags */
//ZZ /* r1 (arg2) is already our child's stack */
//ZZ "   ldr r2, [sp, #12]\n" // parent tid
//ZZ "   ldr r3, [sp, #16]\n" // tls
//ZZ "   ldr r4, [sp, #8]\n" // Child tid
//ZZ "   mov r7, #"__NR_CLONE"\n"
//ZZ "   svc 0x00000000\n"
//ZZ "   cmp r0, #0\n"
//ZZ "   beq 1f\n"
//ZZ 
//ZZ /* Parent */
//ZZ "   pop {r4,r7}\n"
//ZZ "   bx lr\n"
//ZZ 
//ZZ "1:\n" /*child*/
//ZZ "   mov     lr, pc\n"
//ZZ "   pop     {r0,pc}\n"
//ZZ /* Retval from child is already in r0 */
//ZZ "   mov r7, #"__NR_EXIT"\n"
//ZZ "   svc 0x00000000\n"
//ZZ /* Urh.. why did exit return? */
//ZZ "   .long 0\n"
//ZZ "   .previous\n"
//ZZ );
//ZZ 
//ZZ #undef __NR_CLONE
//ZZ #undef __NR_EXIT
//ZZ 
//ZZ // forward declarations
//ZZ static void setup_child ( ThreadArchState*, ThreadArchState* );
//ZZ static void assign_guest_tls(ThreadId ctid, Addr tlsptr);
//ZZ static SysRes sys_set_tls ( ThreadId tid, Addr tlsptr );
//ZZ             
//ZZ /* 
//ZZ    When a client clones, we need to keep track of the new thread.  This means:
//ZZ    1. allocate a ThreadId+ThreadState+stack for the the thread
//ZZ 
//ZZ    2. initialize the thread's new VCPU state
//ZZ 
//ZZ    3. create the thread using the same args as the client requested,
//ZZ    but using the scheduler entrypoint for IP, and a separate stack
//ZZ    for SP.
//ZZ  */
//ZZ static SysRes do_clone ( ThreadId ptid, 
//ZZ                          UInt flags, Addr sp, 
//ZZ                          Int *parent_tidptr, 
//ZZ                          Int *child_tidptr, 
//ZZ                          Addr child_tls)
//ZZ {
//ZZ    const Bool debug = False;
//ZZ 
//ZZ    ThreadId ctid = VG_(alloc_ThreadState)();
//ZZ    ThreadState* ptst = VG_(get_ThreadState)(ptid);
//ZZ    ThreadState* ctst = VG_(get_ThreadState)(ctid);
//ZZ    UInt r0;
//ZZ    UWord *stack;
//ZZ    NSegment const* seg;
//ZZ    SysRes res;
//ZZ    vki_sigset_t blockall, savedmask;
//ZZ 
//ZZ    VG_(sigfillset)(&blockall);
//ZZ 
//ZZ    vg_assert(VG_(is_running_thread)(ptid));
//ZZ    vg_assert(VG_(is_valid_tid)(ctid));
//ZZ 
//ZZ    stack = (UWord*)ML_(allocstack)(ctid);
//ZZ 
//ZZ    if(stack == NULL) {
//ZZ       res = VG_(mk_SysRes_Error)( VKI_ENOMEM );
//ZZ       goto out;
//ZZ    }
//ZZ 
//ZZ    setup_child( &ctst->arch, &ptst->arch );
//ZZ 
//ZZ    ctst->arch.vex.guest_R0 = 0;
//ZZ    if(sp != 0)
//ZZ       ctst->arch.vex.guest_R13 = sp;
//ZZ 
//ZZ    ctst->os_state.parent = ptid;
//ZZ 
//ZZ    ctst->sig_mask = ptst->sig_mask;
//ZZ    ctst->tmp_sig_mask = ptst->sig_mask;
//ZZ 
//ZZ    /* Start the child with its threadgroup being the same as the
//ZZ       parent's.  This is so that any exit_group calls that happen
//ZZ       after the child is created but before it sets its
//ZZ       os_state.threadgroup field for real (in thread_wrapper in
//ZZ       syswrap-linux.c), really kill the new thread.  a.k.a this avoids
//ZZ       a race condition in which the thread is unkillable (via
//ZZ       exit_group) because its threadgroup is not set.  The race window
//ZZ       is probably only a few hundred or a few thousand cycles long.
//ZZ       See #226116. */
//ZZ    ctst->os_state.threadgroup = ptst->os_state.threadgroup;
//ZZ 
//ZZ    seg = VG_(am_find_nsegment)((Addr)sp);
//ZZ    if (seg && seg->kind != SkResvn) {
//ZZ       ctst->client_stack_highest_word = (Addr)VG_PGROUNDUP(sp);
//ZZ       ctst->client_stack_szB = ctst->client_stack_highest_word - seg->start;
//ZZ    
//ZZ       VG_(register_stack)(seg->start, ctst->client_stack_highest_word);
//ZZ    
//ZZ       if (debug)
//ZZ          VG_(printf)("tid %d: guessed client stack range %#lx-%#lx\n",
//ZZ          ctid, seg->start, VG_PGROUNDUP(sp));
//ZZ    } else {
//ZZ       VG_(message)(Vg_UserMsg, "!? New thread %d starts with sp+%#lx) unmapped\n", ctid, sp);
//ZZ       ctst->client_stack_szB  = 0;
//ZZ    }
//ZZ 
//ZZ    vg_assert(VG_(owns_BigLock_LL)(ptid));
//ZZ    VG_TRACK ( pre_thread_ll_create, ptid, ctid );
//ZZ 
//ZZ    if (flags & VKI_CLONE_SETTLS) {
//ZZ       /* Just assign the tls pointer in the guest TPIDRURO. */
//ZZ       assign_guest_tls(ctid, child_tls);
//ZZ    }
//ZZ     
//ZZ    flags &= ~VKI_CLONE_SETTLS;
//ZZ 
//ZZ    VG_(sigprocmask)(VKI_SIG_SETMASK, &blockall, &savedmask);
//ZZ 
//ZZ    r0 = do_syscall_clone_arm_linux(
//ZZ       ML_(start_thread_NORETURN), stack, flags, &VG_(threads)[ctid],
//ZZ       child_tidptr, parent_tidptr, NULL
//ZZ    );
//ZZ    //VG_(printf)("AFTER SYSCALL, %x and %x  CHILD: %d PARENT: %d\n",child_tidptr, parent_tidptr,*child_tidptr,*parent_tidptr);
//ZZ     
//ZZ    res = VG_(mk_SysRes_arm_linux)( r0 );
//ZZ 
//ZZ    VG_(sigprocmask)(VKI_SIG_SETMASK, &savedmask, NULL);
//ZZ 
//ZZ out:
//ZZ    if (sr_isError(res)) {
//ZZ       VG_(cleanup_thread)(&ctst->arch);
//ZZ       ctst->status = VgTs_Empty;
//ZZ       VG_TRACK( pre_thread_ll_exit, ctid );
//ZZ    }
//ZZ 
//ZZ    return res;
//ZZ }


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

// ARM64 doesn't have any architecture specific thread stuff that
// needs to be cleaned up
void VG_(cleanup_thread) ( ThreadArchState* arch )
{
}  

//ZZ void setup_child ( /*OUT*/ ThreadArchState *child,
//ZZ                    /*IN*/  ThreadArchState *parent )
//ZZ {
//ZZ    child->vex = parent->vex;
//ZZ    child->vex_shadow1 = parent->vex_shadow1;
//ZZ    child->vex_shadow2 = parent->vex_shadow2;
//ZZ }
//ZZ 
//ZZ static void assign_guest_tls(ThreadId tid, Addr tlsptr)
//ZZ {
//ZZ    VG_(threads)[tid].arch.vex.guest_TPIDRURO = tlsptr;
//ZZ }
//ZZ 
//ZZ /* Assigns tlsptr to the guest TPIDRURO.
//ZZ    If needed for the specific hardware, really executes
//ZZ    the set_tls syscall.
//ZZ */
//ZZ static SysRes sys_set_tls ( ThreadId tid, Addr tlsptr )
//ZZ {
//ZZ    assign_guest_tls(tid, tlsptr);
//ZZ #if defined(ANDROID_HARDWARE_emulator)
//ZZ    /* Android emulator does not provide an hw tls register.
//ZZ       So, the tls register is emulated by the kernel.
//ZZ       This emulated value is set by the __NR_ARM_set_tls syscall.
//ZZ       The emulated value must be read by the kernel helper function
//ZZ       located at 0xffff0fe0.
//ZZ       
//ZZ       The emulated tlsptr is located at 0xffff0ff0
//ZZ       (so slightly after the kernel helper function).
//ZZ       Note that applications are not supposed to read this directly.
//ZZ       
//ZZ       For compatibility : if there is a hw tls register, the kernel
//ZZ       will put at 0xffff0fe0 the instructions to read it, so
//ZZ       as to have old applications calling the kernel helper
//ZZ       working properly.
//ZZ 
//ZZ       For having emulated guest TLS working correctly with
//ZZ       Valgrind, it is needed to execute the syscall to set
//ZZ       the emulated TLS value in addition to the assignment
//ZZ       of TPIDRURO.
//ZZ 
//ZZ       Note: the below means that if we need thread local storage
//ZZ       for Valgrind host, then there will be a conflict between
//ZZ       the need of the guest tls and of the host tls.
//ZZ       If all the guest code would cleanly call 0xffff0fe0,
//ZZ       then we might maybe intercept this. However, at least
//ZZ       __libc_preinit reads directly 0xffff0ff0.
//ZZ    */
//ZZ    /* ??? might call the below if auxv->u.a_val & VKI_HWCAP_TLS ???
//ZZ       Unclear if real hardware having tls hw register sets
//ZZ       VKI_HWCAP_TLS. */
//ZZ    return VG_(do_syscall1) (__NR_ARM_set_tls, tlsptr);
//ZZ #else
//ZZ    return VG_(mk_SysRes_Success)( 0 );
//ZZ #endif
//ZZ }

/* ---------------------------------------------------------------------
   PRE/POST wrappers for arm/Linux-specific syscalls
   ------------------------------------------------------------------ */

#define PRE(name)       DEFN_PRE_TEMPLATE(arm64_linux, name)
#define POST(name)      DEFN_POST_TEMPLATE(arm64_linux, name)

//ZZ /* Add prototypes for the wrappers declared here, so that gcc doesn't
//ZZ    harass us for not having prototypes.  Really this is a kludge --
//ZZ    the right thing to do is to make these wrappers 'static' since they
//ZZ    aren't visible outside this file, but that requires even more macro
//ZZ    magic. */
//ZZ 
DECL_TEMPLATE(arm64_linux, sys_mmap);
//ZZ DECL_TEMPLATE(arm_linux, sys_stat64);
//ZZ DECL_TEMPLATE(arm_linux, sys_lstat64);
//ZZ DECL_TEMPLATE(arm_linux, sys_fstatat64);
//ZZ DECL_TEMPLATE(arm_linux, sys_fstat64);
DECL_TEMPLATE(arm64_linux, sys_clone);
//ZZ DECL_TEMPLATE(arm_linux, sys_sigreturn);
DECL_TEMPLATE(arm64_linux, sys_rt_sigreturn);
//ZZ DECL_TEMPLATE(arm_linux, sys_sigsuspend);
//ZZ DECL_TEMPLATE(arm_linux, sys_set_tls);
//ZZ DECL_TEMPLATE(arm_linux, sys_cacheflush);
//ZZ DECL_TEMPLATE(arm_linux, sys_ptrace);
//ZZ 
//ZZ PRE(sys_mmap2)
//ZZ {
//ZZ    SysRes r;
//ZZ 
//ZZ    // Exactly like old_mmap() except:
//ZZ    //  - all 6 args are passed in regs, rather than in a memory-block.
//ZZ    //  - the file offset is specified in pagesize units rather than bytes,
//ZZ    //    so that it can be used for files bigger than 2^32 bytes.
//ZZ    // pagesize or 4K-size units in offset?  For ppc32/64-linux, this is
//ZZ    // 4K-sized.  Assert that the page size is 4K here for safety.
//ZZ    vg_assert(VKI_PAGE_SIZE == 4096);
//ZZ    PRINT("sys_mmap2 ( %#lx, %llu, %ld, %ld, %ld, %ld )",
//ZZ          ARG1, (ULong)ARG2, ARG3, ARG4, ARG5, ARG6 );
//ZZ    PRE_REG_READ6(long, "mmap2",
//ZZ                  unsigned long, start, unsigned long, length,
//ZZ                  unsigned long, prot,  unsigned long, flags,
//ZZ                  unsigned long, fd,    unsigned long, offset);
//ZZ 
//ZZ    r = ML_(generic_PRE_sys_mmap)( tid, ARG1, ARG2, ARG3, ARG4, ARG5, 
//ZZ                                        4096 * (Off64T)ARG6 );
//ZZ    SET_STATUS_from_SysRes(r);
//ZZ }

// ARM64 FIXME is this correct?
PRE(sys_mmap)
{
   SysRes r;

   PRINT("sys_mmap ( %#lx, %llu, %ld, %ld, %d, %ld )",
         ARG1, (ULong)ARG2, ARG3, ARG4, (Int)ARG5, ARG6 );
   PRE_REG_READ6(long, "mmap",
                 unsigned long, start, unsigned long, length,
                 unsigned long, prot,  unsigned long, flags,
                 unsigned long, fd,    unsigned long, offset);

   r = ML_(generic_PRE_sys_mmap)( tid, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6 );
   SET_STATUS_from_SysRes(r);
}

//ZZ 
//ZZ // XXX: lstat64/fstat64/stat64 are generic, but not necessarily
//ZZ // applicable to every architecture -- I think only to 32-bit archs.
//ZZ // We're going to need something like linux/core_os32.h for such
//ZZ // things, eventually, I think.  --njn
//ZZ PRE(sys_lstat64)
//ZZ {
//ZZ    PRINT("sys_lstat64 ( %#lx(%s), %#lx )",ARG1,(char*)ARG1,ARG2);
//ZZ    PRE_REG_READ2(long, "lstat64", char *, file_name, struct stat64 *, buf);
//ZZ    PRE_MEM_RASCIIZ( "lstat64(file_name)", ARG1 );
//ZZ    PRE_MEM_WRITE( "lstat64(buf)", ARG2, sizeof(struct vki_stat64) );
//ZZ }
//ZZ 
//ZZ POST(sys_lstat64)
//ZZ {
//ZZ    vg_assert(SUCCESS);
//ZZ    if (RES == 0) {
//ZZ       POST_MEM_WRITE( ARG2, sizeof(struct vki_stat64) );
//ZZ    }
//ZZ }
//ZZ 
//ZZ PRE(sys_stat64)
//ZZ {
//ZZ    PRINT("sys_stat64 ( %#lx(%s), %#lx )",ARG1,(char*)ARG1,ARG2);
//ZZ    PRE_REG_READ2(long, "stat64", char *, file_name, struct stat64 *, buf);
//ZZ    PRE_MEM_RASCIIZ( "stat64(file_name)", ARG1 );
//ZZ    PRE_MEM_WRITE( "stat64(buf)", ARG2, sizeof(struct vki_stat64) );
//ZZ }
//ZZ 
//ZZ POST(sys_stat64)
//ZZ {
//ZZ    POST_MEM_WRITE( ARG2, sizeof(struct vki_stat64) );
//ZZ }
//ZZ 
//ZZ PRE(sys_fstatat64)
//ZZ {
//ZZ    PRINT("sys_fstatat64 ( %ld, %#lx(%s), %#lx )",ARG1,ARG2,(char*)ARG2,ARG3);
//ZZ    PRE_REG_READ3(long, "fstatat64",
//ZZ                  int, dfd, char *, file_name, struct stat64 *, buf);
//ZZ    PRE_MEM_RASCIIZ( "fstatat64(file_name)", ARG2 );
//ZZ    PRE_MEM_WRITE( "fstatat64(buf)", ARG3, sizeof(struct vki_stat64) );
//ZZ }
//ZZ 
//ZZ POST(sys_fstatat64)
//ZZ {
//ZZ    POST_MEM_WRITE( ARG3, sizeof(struct vki_stat64) );
//ZZ }
//ZZ 
//ZZ PRE(sys_fstat64)
//ZZ {
//ZZ    PRINT("sys_fstat64 ( %ld, %#lx )",ARG1,ARG2);
//ZZ    PRE_REG_READ2(long, "fstat64", unsigned long, fd, struct stat64 *, buf);
//ZZ    PRE_MEM_WRITE( "fstat64(buf)", ARG2, sizeof(struct vki_stat64) );
//ZZ }
//ZZ 
//ZZ POST(sys_fstat64)
//ZZ {
//ZZ    POST_MEM_WRITE( ARG2, sizeof(struct vki_stat64) );
//ZZ }

PRE(sys_clone)
{
    UInt cloneflags;

   PRINT("sys_clone ( %lx, %#lx, %#lx, %#lx, %#lx )",ARG1,ARG2,ARG3,ARG4,ARG5);
   PRE_REG_READ5(int, "clone",
                 unsigned long, flags,
                 void *, child_stack,
                 int *, parent_tidptr,
                 void *, child_tls,
                 int *, child_tidptr);

   if (ARG1 & VKI_CLONE_PARENT_SETTID) {
      PRE_MEM_WRITE("clone(parent_tidptr)", ARG3, sizeof(Int));
      if (!VG_(am_is_valid_for_client)(ARG3, sizeof(Int), 
                                             VKI_PROT_WRITE)) {
         SET_STATUS_Failure( VKI_EFAULT );
         return;
      }
   }
   if (ARG1 & (VKI_CLONE_CHILD_SETTID | VKI_CLONE_CHILD_CLEARTID)) {
      PRE_MEM_WRITE("clone(child_tidptr)", ARG5, sizeof(Int));
      if (!VG_(am_is_valid_for_client)(ARG5, sizeof(Int), 
                                             VKI_PROT_WRITE)) {
         SET_STATUS_Failure( VKI_EFAULT );
         return;
      }
   }
//ZZ    if (ARG1 & VKI_CLONE_SETTLS) {
//ZZ       PRE_MEM_READ("clone(tls_user_desc)", ARG4, sizeof(vki_modify_ldt_t));
//ZZ       if (!VG_(am_is_valid_for_client)(ARG4, sizeof(vki_modify_ldt_t), 
//ZZ                                              VKI_PROT_READ)) {
//ZZ          SET_STATUS_Failure( VKI_EFAULT );
//ZZ          return;
//ZZ       }
//ZZ    }

   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)) {
//ZZ    case VKI_CLONE_VM | VKI_CLONE_FS | VKI_CLONE_FILES:
//ZZ       /* thread creation */
//ZZ       SET_STATUS_from_SysRes(
//ZZ          do_clone(tid,
//ZZ                   ARG1,         /* flags */
//ZZ                   (Addr)ARG2,   /* child ESP */
//ZZ                   (Int *)ARG3,  /* parent_tidptr */
//ZZ                   (Int *)ARG5,  /* child_tidptr */
//ZZ                   (Addr)ARG4)); /* set_tls */
//ZZ       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, "");
      VG_(message)(Vg_UserMsg, "Unsupported clone() flags: 0x%lx", ARG1);
      VG_(message)(Vg_UserMsg, "");
      VG_(message)(Vg_UserMsg, "The only supported clone() uses are:");
      VG_(message)(Vg_UserMsg, " - via a threads library (LinuxThreads or NPTL)");
      VG_(message)(Vg_UserMsg, " - via the implementation of fork or vfork");
      VG_(message)(Vg_UserMsg, " - for the Quadrics Elan3 user-space driver");
      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;
   }
}

//ZZ PRE(sys_sigreturn)
//ZZ {
//ZZ    /* See comments on PRE(sys_rt_sigreturn) in syswrap-amd64-linux.c for
//ZZ      an explanation of what follows. */
//ZZ 
//ZZ    PRINT("sys_sigreturn ( )");
//ZZ 
//ZZ    vg_assert(VG_(is_valid_tid)(tid));
//ZZ    vg_assert(tid >= 1 && tid < VG_N_THREADS);
//ZZ    vg_assert(VG_(is_running_thread)(tid));
//ZZ 
//ZZ    /* Restore register state from frame and remove it */
//ZZ    VG_(sigframe_destroy)(tid, False);
//ZZ 
//ZZ    /* Tell the driver not to update the guest state with the "result",
//ZZ       and set a bogus result to keep it happy. */
//ZZ    *flags |= SfNoWriteResult;
//ZZ    SET_STATUS_Success(0);
//ZZ 
//ZZ    /* Check to see if any signals arose as a result of this. */
//ZZ    *flags |= SfPollAfter;
//ZZ }

PRE(sys_rt_sigreturn)
{
  /* See comments on PRE(sys_rt_sigreturn) in syswrap-amd64-linux.c for
      an explanation of what follows. */

   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;
}

//ZZ /* NB: clone of x86-linux version, and ppc32-linux has an almost
//ZZ    identical one. */
//ZZ PRE(sys_sigsuspend)
//ZZ {
//ZZ    /* The C library interface to sigsuspend just takes a pointer to
//ZZ       a signal mask but this system call has three arguments - the first
//ZZ       two don't appear to be used by the kernel and are always passed as
//ZZ       zero by glibc and the third is the first word of the signal mask
//ZZ       so only 32 signals are supported.
//ZZ      
//ZZ       In fact glibc normally uses rt_sigsuspend if it is available as
//ZZ       that takes a pointer to the signal mask so supports more signals.
//ZZ     */
//ZZ    *flags |= SfMayBlock;
//ZZ    PRINT("sys_sigsuspend ( %ld, %ld, %ld )", ARG1,ARG2,ARG3 );
//ZZ    PRE_REG_READ3(int, "sigsuspend",
//ZZ                  int, history0, int, history1,
//ZZ                  vki_old_sigset_t, mask);
//ZZ }
//ZZ 
//ZZ /* Very much ARM specific */
//ZZ 
//ZZ PRE(sys_set_tls)
//ZZ {
//ZZ    PRINT("set_tls (%lx)",ARG1);
//ZZ    PRE_REG_READ1(long, "set_tls", unsigned long, addr);
//ZZ 
//ZZ    SET_STATUS_from_SysRes( sys_set_tls( tid, ARG1 ) );
//ZZ }
//ZZ 
//ZZ PRE(sys_cacheflush)
//ZZ {
//ZZ    PRINT("cacheflush (%lx, %#lx, %#lx)",ARG1,ARG2,ARG3);
//ZZ    PRE_REG_READ3(long, "cacheflush", void*, addrlow,void*, addrhigh,int, flags);
//ZZ    VG_(discard_translations)( (Addr64)ARG1,
//ZZ                               ((ULong)ARG2) - ((ULong)ARG1) + 1ULL/*paranoia*/,
//ZZ                               "PRE(sys_cacheflush)" );
//ZZ    SET_STATUS_Success(0);
//ZZ }
//ZZ 
//ZZ // ARG3 is only used for pointers into the traced process's address
//ZZ // space and for offsets into the traced process's struct
//ZZ // user_regs_struct. It is never a pointer into this process's memory
//ZZ // space, and we should therefore not check anything it points to.
//ZZ PRE(sys_ptrace)
//ZZ {
//ZZ    PRINT("sys_ptrace ( %ld, %ld, %#lx, %#lx )", ARG1,ARG2,ARG3,ARG4);
//ZZ    PRE_REG_READ4(int, "ptrace", 
//ZZ                  long, request, long, pid, long, addr, long, data);
//ZZ    switch (ARG1) {
//ZZ    case VKI_PTRACE_PEEKTEXT:
//ZZ    case VKI_PTRACE_PEEKDATA:
//ZZ    case VKI_PTRACE_PEEKUSR:
//ZZ       PRE_MEM_WRITE( "ptrace(peek)", ARG4, 
//ZZ 		     sizeof (long));
//ZZ       break;
//ZZ    case VKI_PTRACE_GETREGS:
//ZZ       PRE_MEM_WRITE( "ptrace(getregs)", ARG4, 
//ZZ 		     sizeof (struct vki_user_regs_struct));
//ZZ       break;
//ZZ    case VKI_PTRACE_GETFPREGS:
//ZZ       PRE_MEM_WRITE( "ptrace(getfpregs)", ARG4, 
//ZZ 		     sizeof (struct vki_user_fp));
//ZZ       break;
//ZZ    case VKI_PTRACE_GETWMMXREGS:
//ZZ       PRE_MEM_WRITE( "ptrace(getwmmxregs)", ARG4, 
//ZZ 		     VKI_IWMMXT_SIZE);
//ZZ       break;
//ZZ    case VKI_PTRACE_GETCRUNCHREGS:
//ZZ       PRE_MEM_WRITE( "ptrace(getcrunchregs)", ARG4, 
//ZZ 		     VKI_CRUNCH_SIZE);
//ZZ       break;
//ZZ    case VKI_PTRACE_GETVFPREGS:
//ZZ       PRE_MEM_WRITE( "ptrace(getvfpregs)", ARG4, 
//ZZ                      sizeof (struct vki_user_vfp) );
//ZZ       break;
//ZZ    case VKI_PTRACE_GETHBPREGS:
//ZZ       PRE_MEM_WRITE( "ptrace(gethbpregs)", ARG4, 
//ZZ                      sizeof (unsigned long) );
//ZZ       break;
//ZZ    case VKI_PTRACE_SETREGS:
//ZZ       PRE_MEM_READ( "ptrace(setregs)", ARG4, 
//ZZ 		     sizeof (struct vki_user_regs_struct));
//ZZ       break;
//ZZ    case VKI_PTRACE_SETFPREGS:
//ZZ       PRE_MEM_READ( "ptrace(setfpregs)", ARG4, 
//ZZ 		     sizeof (struct vki_user_fp));
//ZZ       break;
//ZZ    case VKI_PTRACE_SETWMMXREGS:
//ZZ       PRE_MEM_READ( "ptrace(setwmmxregs)", ARG4, 
//ZZ 		     VKI_IWMMXT_SIZE);
//ZZ       break;
//ZZ    case VKI_PTRACE_SETCRUNCHREGS:
//ZZ       PRE_MEM_READ( "ptrace(setcrunchregs)", ARG4, 
//ZZ 		     VKI_CRUNCH_SIZE);
//ZZ       break;
//ZZ    case VKI_PTRACE_SETVFPREGS:
//ZZ       PRE_MEM_READ( "ptrace(setvfpregs)", ARG4, 
//ZZ                      sizeof (struct vki_user_vfp));
//ZZ       break;
//ZZ    case VKI_PTRACE_SETHBPREGS:
//ZZ       PRE_MEM_READ( "ptrace(sethbpregs)", ARG4, sizeof(unsigned long));
//ZZ       break;
//ZZ    case VKI_PTRACE_GET_THREAD_AREA:
//ZZ       PRE_MEM_WRITE( "ptrace(get_thread_area)", ARG4, sizeof(unsigned long));
//ZZ       break;
//ZZ    case VKI_PTRACE_GETEVENTMSG:
//ZZ       PRE_MEM_WRITE( "ptrace(geteventmsg)", ARG4, sizeof(unsigned long));
//ZZ       break;
//ZZ    case VKI_PTRACE_GETSIGINFO:
//ZZ       PRE_MEM_WRITE( "ptrace(getsiginfo)", ARG4, sizeof(vki_siginfo_t));
//ZZ       break;
//ZZ    case VKI_PTRACE_SETSIGINFO:
//ZZ       PRE_MEM_READ( "ptrace(setsiginfo)", ARG4, sizeof(vki_siginfo_t));
//ZZ       break;
//ZZ    case VKI_PTRACE_GETREGSET:
//ZZ       ML_(linux_PRE_getregset)(tid, ARG3, ARG4);
//ZZ       break;
//ZZ    case VKI_PTRACE_SETREGSET:
//ZZ       ML_(linux_PRE_setregset)(tid, ARG3, ARG4);
//ZZ       break;
//ZZ    default:
//ZZ       break;
//ZZ    }
//ZZ }
//ZZ 
//ZZ POST(sys_ptrace)
//ZZ {
//ZZ    switch (ARG1) {
//ZZ    case VKI_PTRACE_PEEKTEXT:
//ZZ    case VKI_PTRACE_PEEKDATA:
//ZZ    case VKI_PTRACE_PEEKUSR:
//ZZ       POST_MEM_WRITE( ARG4, sizeof (long));
//ZZ       break;
//ZZ    case VKI_PTRACE_GETREGS:
//ZZ       POST_MEM_WRITE( ARG4, sizeof (struct vki_user_regs_struct));
//ZZ       break;
//ZZ    case VKI_PTRACE_GETFPREGS:
//ZZ       POST_MEM_WRITE( ARG4, sizeof (struct vki_user_fp));
//ZZ       break;
//ZZ    case VKI_PTRACE_GETWMMXREGS:
//ZZ       POST_MEM_WRITE( ARG4, VKI_IWMMXT_SIZE);
//ZZ       break;
//ZZ    case VKI_PTRACE_GETCRUNCHREGS:
//ZZ       POST_MEM_WRITE( ARG4, VKI_CRUNCH_SIZE);
//ZZ       break;
//ZZ    case VKI_PTRACE_GETVFPREGS:
//ZZ       POST_MEM_WRITE( ARG4, sizeof(struct vki_user_vfp));
//ZZ       break;
//ZZ    case VKI_PTRACE_GET_THREAD_AREA:
//ZZ    case VKI_PTRACE_GETHBPREGS:
//ZZ    case VKI_PTRACE_GETEVENTMSG:
//ZZ       POST_MEM_WRITE( ARG4, sizeof(unsigned long));
//ZZ       break;
//ZZ    case VKI_PTRACE_GETSIGINFO:
//ZZ       /* XXX: This is a simplification. Different parts of the
//ZZ        * siginfo_t are valid depending on the type of signal.
//ZZ        */
//ZZ       POST_MEM_WRITE( ARG4, sizeof(vki_siginfo_t));
//ZZ       break;
//ZZ    case VKI_PTRACE_GETREGSET:
//ZZ       ML_(linux_POST_getregset)(tid, ARG3, ARG4);
//ZZ       break;
//ZZ    default:
//ZZ       break;
//ZZ    }
//ZZ }
//ZZ 
//ZZ #undef PRE
//ZZ #undef POST

/* ---------------------------------------------------------------------
   The arm64/Linux syscall table
   ------------------------------------------------------------------ */

//ZZ #if 0
//ZZ #define __NR_OABI_SYSCALL_BASE 0x900000
//ZZ #else
//ZZ #define __NR_OABI_SYSCALL_BASE 0x0
//ZZ #endif

#define PLAX_(sysno, name)    WRAPPER_ENTRY_X_(arm64_linux, sysno, name) 
#define PLAXY(sysno, name)    WRAPPER_ENTRY_XY(arm64_linux, sysno, name)

// This table maps from __NR_xxx syscall numbers (from
// linux/include/asm-arm/unistd.h) to the appropriate PRE/POST sys_foo()
// wrappers on arm64 (as per sys_call_table in linux/arch/arm/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[] = {
   LINXY(__NR_getxattr,          sys_getxattr),          // 8
   LINXY(__NR_lgetxattr,         sys_lgetxattr),         // 9
   GENXY(__NR_getcwd,            sys_getcwd),            // 17
   LINXY(__NR_dup3,              sys_dup3),              // 24

   // FIXME IS THIS CORRECT?
   LINXY(__NR3264_fcntl,         sys_fcntl),             // 25

   LINXY(__NR_ioctl,             sys_ioctl),             // 29
   LINX_(__NR_mkdirat,           sys_mkdirat),           // 34
   LINX_(__NR_unlinkat,          sys_unlinkat),          // 35

   // FIXME IS THIS CORRECT?  it may well not be.
   GENXY(__NR3264_statfs,        sys_statfs),            // 43

   LINX_(__NR_faccessat,         sys_faccessat),         // 48
   GENX_(__NR_chdir,             sys_chdir),             // 49
   LINXY(__NR_openat,            sys_openat),            // 56
   GENXY(__NR_close,             sys_close),             // 57
   LINXY(__NR_pipe2,             sys_pipe2),             // 59
   GENXY(__NR_getdents64,        sys_getdents64),        // 61

   // FIXME IS THIS CORRECT?
   LINX_(__NR3264_lseek,         sys_lseek),             // 62

   GENXY(__NR_read,              sys_read),              // 63
   GENX_(__NR_write,             sys_write),             // 64
   GENX_(__NR_writev,            sys_writev),            // 66

   LINX_(__NR_readlinkat,        sys_readlinkat),        // 78

   // FIXME IS THIS CORRECT?
   LINXY(__NR3264_fstatat,       sys_newfstatat),        // 79
   GENXY(__NR3264_fstat,         sys_newfstat),          // 80

   LINX_(__NR_exit_group,        sys_exit_group),        // 94
   LINX_(__NR_set_tid_address,   sys_set_tid_address),   // 96
   LINXY(__NR_futex,             sys_futex),             // 98
   LINX_(__NR_set_robust_list,   sys_set_robust_list),   // 99
   LINXY(__NR_clock_gettime,     sys_clock_gettime),     // 113
   LINX_(__NR_tgkill,            sys_tgkill),            // 131 */Linux
   LINXY(__NR_rt_sigaction,      sys_rt_sigaction),      // 134
   LINXY(__NR_rt_sigprocmask,    sys_rt_sigprocmask),    // 135
   PLAX_(__NR_rt_sigreturn,      sys_rt_sigreturn),      // 139
   GENX_(__NR_getpgid,           sys_getpgid),           // 155
   GENXY(__NR_uname,             sys_newuname),          // 160
   GENXY(__NR_getrlimit,         sys_old_getrlimit),     // 163
   GENXY(__NR_getrusage,         sys_getrusage),         // 165
   GENXY(__NR_gettimeofday,      sys_gettimeofday),      // 169
   GENX_(__NR_getpid,            sys_getpid),            // 172
   GENX_(__NR_getppid,           sys_getppid),           // 173
   GENX_(__NR_getuid,            sys_getuid),            // 174
   GENX_(__NR_geteuid,           sys_geteuid),           // 175
   GENX_(__NR_getgid,            sys_getgid),            // 176
   GENX_(__NR_getegid,           sys_getegid),           // 177
   LINX_(__NR_gettid,            sys_gettid),            // 178
   LINXY(__NR_socket,            sys_socket),            // 198
   LINX_(__NR_connect,           sys_connect),           // 203
   GENX_(__NR_brk,               sys_brk),               // 214
   GENXY(__NR_munmap,            sys_munmap),            // 215
   PLAX_(__NR_clone,             sys_clone),             // 220
   GENX_(__NR_execve,            sys_execve),            // 221

   // FIXME IS THIS CORRECT?
   PLAX_(__NR3264_mmap,          sys_mmap),              // 222

   GENXY(__NR_mprotect,          sys_mprotect),          // 226
   GENXY(__NR_wait4,             sys_wait4),             // 260

// The numbers below are bogus.  (See comment further down.)
// When pulling entries above this line, change the numbers
// to be correct.

//ZZ    GENX_(__NR_exit,              sys_exit),           // 93
//ZZ //zz    //   (restart_syscall)                             // 0
//ZZ    GENX_(__NR_fork,              sys_fork),           // 2
//ZZ 
//ZZ    GENXY(__NR_open,              sys_open),           // 5
//ZZ //   GENXY(__NR_waitpid,           sys_waitpid),        // 7
//ZZ    GENXY(__NR_creat,             sys_creat),          // 8
//ZZ    GENX_(__NR_link,              sys_link),           // 9
//ZZ 
//ZZ    GENX_(__NR_unlink,            sys_unlink),         // 10
//ZZ    GENXY(__NR_time,              sys_time),           // 13
//ZZ    GENX_(__NR_mknod,             sys_mknod),          // 14
//ZZ 
//ZZ    GENX_(__NR_chmod,             sys_chmod),          // 15
//ZZ //zz    LINX_(__NR_lchown,            sys_lchown16),       // 16
//ZZ //   GENX_(__NR_break,             sys_ni_syscall),     // 17
//ZZ //zz    //   (__NR_oldstat,           sys_stat),           // 18 (obsolete)
//ZZ    LINX_(__NR_lseek,             sys_lseek),          // 19
//ZZ 
//ZZ    GENX_(__NR_getpid,            sys_getpid),         // 20
//ZZ    LINX_(__NR_mount,             sys_mount),          // 21
//ZZ    LINX_(__NR_umount,            sys_oldumount),      // 22
//ZZ    LINX_(__NR_setuid,            sys_setuid16),       // 23 ## P
//ZZ    LINX_(__NR_getuid,            sys_getuid16),       // 24 ## P
//ZZ //zz 
//ZZ //zz    //   (__NR_stime,             sys_stime),          // 25 * (SVr4,SVID,X/OPEN)
//ZZ    PLAXY(__NR_ptrace,            sys_ptrace),         // 26
//ZZ    GENX_(__NR_alarm,             sys_alarm),          // 27
//ZZ //zz    //   (__NR_oldfstat,          sys_fstat),          // 28 * L -- obsolete
//ZZ    GENX_(__NR_pause,             sys_pause),          // 29
//ZZ 
//ZZ    LINX_(__NR_utime,             sys_utime),          // 30
//ZZ //   GENX_(__NR_stty,              sys_ni_syscall),     // 31
//ZZ //   GENX_(__NR_gtty,              sys_ni_syscall),     // 32
//ZZ    GENX_(__NR_access,            sys_access),         // 33
//ZZ    GENX_(__NR_nice,              sys_nice),           // 34
//ZZ 
//ZZ //   GENX_(__NR_ftime,             sys_ni_syscall),     // 35
//ZZ    GENX_(__NR_sync,              sys_sync),           // 36
//ZZ    GENX_(__NR_kill,              sys_kill),           // 37
//ZZ    GENX_(__NR_rename,            sys_rename),         // 38
//ZZ    GENX_(__NR_mkdir,             sys_mkdir),          // 39
//ZZ 
//ZZ    GENX_(__NR_rmdir,             sys_rmdir),          // 40
//ZZ    GENXY(__NR_dup,               sys_dup),            // 41
//ZZ    LINXY(__NR_pipe,              sys_pipe),           // 42
//ZZ    GENXY(__NR_times,             sys_times),          // 43
//ZZ //   GENX_(__NR_prof,              sys_ni_syscall),     // 44

//ZZ    LINX_(__NR_setgid,            sys_setgid16),       // 46
//ZZ    LINX_(__NR_getgid,            sys_getgid16),       // 47
//ZZ //zz    //   (__NR_signal,            sys_signal),         // 48 */* (ANSI C)
//ZZ    LINX_(__NR_geteuid,           sys_geteuid16),      // 49
//ZZ 
//ZZ    LINX_(__NR_getegid,           sys_getegid16),      // 50
//ZZ    GENX_(__NR_acct,              sys_acct),           // 51
//ZZ    LINX_(__NR_umount2,           sys_umount),         // 52
//ZZ //   GENX_(__NR_lock,              sys_ni_syscall),     // 53
//ZZ 
//ZZ    LINXY(__NR_fcntl,             sys_fcntl),          // 55
//ZZ //   GENX_(__NR_mpx,               sys_ni_syscall),     // 56
//ZZ    GENX_(__NR_setpgid,           sys_setpgid),        // 57
//ZZ //   GENX_(__NR_ulimit,            sys_ni_syscall),     // 58
//ZZ //zz    //   (__NR_oldolduname,       sys_olduname),       // 59 Linux -- obsolete
//ZZ //zz 
//ZZ    GENX_(__NR_umask,             sys_umask),          // 60
//ZZ    GENX_(__NR_chroot,            sys_chroot),         // 61
//ZZ //zz    //   (__NR_ustat,             sys_ustat)           // 62 SVr4 -- deprecated
//ZZ    GENXY(__NR_dup2,              sys_dup2),           // 63
//ZZ    GENX_(__NR_getppid,           sys_getppid),        // 64
//ZZ 
//ZZ    GENX_(__NR_getpgrp,           sys_getpgrp),        // 65
//ZZ    GENX_(__NR_setsid,            sys_setsid),         // 66
//ZZ    LINXY(__NR_sigaction,         sys_sigaction),      // 67
//ZZ //zz    //   (__NR_sgetmask,          sys_sgetmask),       // 68 */* (ANSI C)
//ZZ //zz    //   (__NR_ssetmask,          sys_ssetmask),       // 69 */* (ANSI C)
//ZZ //zz 
//ZZ    LINX_(__NR_setreuid,          sys_setreuid16),     // 70
//ZZ    LINX_(__NR_setregid,          sys_setregid16),     // 71
//ZZ    PLAX_(__NR_sigsuspend,        sys_sigsuspend),     // 72
//ZZ    LINXY(__NR_sigpending,        sys_sigpending),     // 73
//ZZ //zz    //   (__NR_sethostname,       sys_sethostname),    // 74 */*
//ZZ //zz 
//ZZ    GENX_(__NR_setrlimit,         sys_setrlimit),      // 75
//ZZ    GENXY(__NR_getrlimit,         sys_old_getrlimit),  // 76
//ZZ    GENX_(__NR_settimeofday,      sys_settimeofday),   // 79
//ZZ 
//ZZ    LINXY(__NR_getgroups,         sys_getgroups16),    // 80
//ZZ    LINX_(__NR_setgroups,         sys_setgroups16),    // 81
//ZZ //   PLAX_(__NR_select,            old_select),         // 82
//ZZ    GENX_(__NR_symlink,           sys_symlink),        // 83
//ZZ //zz    //   (__NR_oldlstat,          sys_lstat),          // 84 -- obsolete
//ZZ //zz 
//ZZ    GENX_(__NR_readlink,          sys_readlink),       // 85
//ZZ //zz    //   (__NR_uselib,            sys_uselib),         // 86 */Linux
//ZZ //zz    //   (__NR_swapon,            sys_swapon),         // 87 */Linux
//ZZ //zz    //   (__NR_reboot,            sys_reboot),         // 88 */Linux
//ZZ //zz    //   (__NR_readdir,           old_readdir),        // 89 -- superseded
//ZZ //zz 
//ZZ //   _____(__NR_mmap,              old_mmap),           // 90
//ZZ    GENXY(__NR_munmap,            sys_munmap),         // 91
//ZZ    GENX_(__NR_truncate,          sys_truncate),       // 92
//ZZ    GENX_(__NR_ftruncate,         sys_ftruncate),      // 93
//ZZ    GENX_(__NR_fchmod,            sys_fchmod),         // 94
//ZZ 
//ZZ    LINX_(__NR_fchown,            sys_fchown16),       // 95
//ZZ    GENX_(__NR_getpriority,       sys_getpriority),    // 96
//ZZ    GENX_(__NR_setpriority,       sys_setpriority),    // 97
//ZZ //   GENX_(__NR_profil,            sys_ni_syscall),     // 98
//ZZ    GENXY(__NR_statfs,            sys_statfs),         // 99
//ZZ 
//ZZ    GENXY(__NR_fstatfs,           sys_fstatfs),        // 100
//ZZ //   LINX_(__NR_ioperm,            sys_ioperm),         // 101
//ZZ    LINXY(__NR_socketcall,        sys_socketcall),     // 102
//ZZ    LINXY(__NR_syslog,            sys_syslog),         // 103
//ZZ    GENXY(__NR_setitimer,         sys_setitimer),      // 104
//ZZ 
//ZZ    GENXY(__NR_getitimer,         sys_getitimer),      // 105
//ZZ    GENXY(__NR_stat,              sys_newstat),        // 106
//ZZ    GENXY(__NR_lstat,             sys_newlstat),       // 107
//ZZ    GENXY(__NR_fstat,             sys_newfstat),       // 108
//ZZ //zz    //   (__NR_olduname,          sys_uname),          // 109 -- obsolete
//ZZ //zz 
//ZZ //   GENX_(__NR_iopl,              sys_iopl),           // 110
//ZZ    LINX_(__NR_vhangup,           sys_vhangup),        // 111
//ZZ //   GENX_(__NR_idle,              sys_ni_syscall),     // 112
//ZZ // PLAXY(__NR_vm86old,           sys_vm86old),        // 113 __NR_syscall... weird
//ZZ //zz 
//ZZ //zz    //   (__NR_swapoff,           sys_swapoff),        // 115 */Linux 
//ZZ    LINXY(__NR_sysinfo,           sys_sysinfo),        // 116
//ZZ //   _____(__NR_ipc,               sys_ipc),            // 117
//ZZ    GENX_(__NR_fsync,             sys_fsync),          // 118
//ZZ    PLAX_(__NR_sigreturn,         sys_sigreturn),      // 119 ?/Linux
//ZZ 
//ZZ //zz    //   (__NR_setdomainname,     sys_setdomainname),  // 121 */*(?)
//ZZ //   PLAX_(__NR_modify_ldt,        sys_modify_ldt),     // 123
//ZZ //zz    LINXY(__NR_adjtimex,          sys_adjtimex),       // 124
//ZZ //zz 
//ZZ    LINXY(__NR_sigprocmask,       sys_sigprocmask),    // 126
//ZZ //zz    // Nb: create_module() was removed 2.4-->2.6
//ZZ //   GENX_(__NR_create_module,     sys_ni_syscall),     // 127
//ZZ    LINX_(__NR_init_module,       sys_init_module),    // 128
//ZZ    LINX_(__NR_delete_module,     sys_delete_module),  // 129
//ZZ //zz 
//ZZ //zz    // Nb: get_kernel_syms() was removed 2.4-->2.6
//ZZ //   GENX_(__NR_get_kernel_syms,   sys_ni_syscall),     // 130
//ZZ    LINX_(__NR_quotactl,          sys_quotactl),       // 131
//ZZ    GENX_(__NR_getpgid,           sys_getpgid),        // 132
//ZZ    GENX_(__NR_fchdir,            sys_fchdir),         // 133
//ZZ //zz    //   (__NR_bdflush,           sys_bdflush),        // 134 */Linux
//ZZ //zz 
//ZZ //zz    //   (__NR_sysfs,             sys_sysfs),          // 135 SVr4
//ZZ    LINX_(__NR_personality,       sys_personality),    // 136
//ZZ //   GENX_(__NR_afs_syscall,       sys_ni_syscall),     // 137
//ZZ    LINX_(__NR_setfsuid,          sys_setfsuid16),     // 138
//ZZ    LINX_(__NR_setfsgid,          sys_setfsgid16),     // 139
//ZZ  
//ZZ    LINXY(__NR__llseek,           sys_llseek),         // 140
//ZZ    GENXY(__NR_getdents,          sys_getdents),       // 141
//ZZ    GENX_(__NR__newselect,        sys_select),         // 142
//ZZ    GENX_(__NR_flock,             sys_flock),          // 143
//ZZ    GENX_(__NR_msync,             sys_msync),          // 144
//ZZ 
//ZZ    GENXY(__NR_readv,             sys_readv),          // 145
//ZZ    GENX_(__NR_getsid,            sys_getsid),         // 147
//ZZ    GENX_(__NR_fdatasync,         sys_fdatasync),      // 148
//ZZ    LINXY(__NR__sysctl,           sys_sysctl),         // 149
//ZZ 
//ZZ    GENX_(__NR_mlock,             sys_mlock),          // 150
//ZZ    GENX_(__NR_munlock,           sys_munlock),        // 151
//ZZ    GENX_(__NR_mlockall,          sys_mlockall),       // 152
//ZZ    LINX_(__NR_munlockall,        sys_munlockall),     // 153
//ZZ    LINXY(__NR_sched_setparam,    sys_sched_setparam), // 154
//ZZ 
//ZZ    LINXY(__NR_sched_getparam,         sys_sched_getparam),        // 155
//ZZ    LINX_(__NR_sched_setscheduler,     sys_sched_setscheduler),    // 156
//ZZ    LINX_(__NR_sched_getscheduler,     sys_sched_getscheduler),    // 157
//ZZ    LINX_(__NR_sched_yield,            sys_sched_yield),           // 158
//ZZ    LINX_(__NR_sched_get_priority_max, sys_sched_get_priority_max),// 159
//ZZ 
//ZZ    LINX_(__NR_sched_get_priority_min, sys_sched_get_priority_min),// 160
//ZZ //zz    //LINX?(__NR_sched_rr_get_interval,  sys_sched_rr_get_interval), // 161 */*
//ZZ    GENXY(__NR_nanosleep,         sys_nanosleep),      // 162
//ZZ    GENX_(__NR_mremap,            sys_mremap),         // 163
//ZZ    LINX_(__NR_setresuid,         sys_setresuid16),    // 164
//ZZ 
//ZZ    LINXY(__NR_getresuid,         sys_getresuid16),    // 165
//ZZ //   PLAXY(__NR_vm86,              sys_vm86),           // 166 x86/Linux-only
//ZZ //   GENX_(__NR_query_module,      sys_ni_syscall),     // 167
//ZZ    GENXY(__NR_poll,              sys_poll),           // 168
//ZZ //zz    //   (__NR_nfsservctl,        sys_nfsservctl),     // 169 */Linux
//ZZ //zz 
//ZZ    LINX_(__NR_setresgid,         sys_setresgid16),    // 170
//ZZ    LINXY(__NR_getresgid,         sys_getresgid16),    // 171
//ZZ    LINXY(__NR_prctl,             sys_prctl),          // 172
//ZZ    LINXY(__NR_rt_sigaction,      sys_rt_sigaction),   // 174
//ZZ 
//ZZ    LINXY(__NR_rt_sigpending,     sys_rt_sigpending),  // 176
//ZZ    LINXY(__NR_rt_sigtimedwait,   sys_rt_sigtimedwait),// 177
//ZZ    LINXY(__NR_rt_sigqueueinfo,   sys_rt_sigqueueinfo),// 178
//ZZ    LINX_(__NR_rt_sigsuspend,     sys_rt_sigsuspend),  // 179
//ZZ 
//ZZ    GENXY(__NR_pread64,           sys_pread64),        // 180
//ZZ    GENX_(__NR_pwrite64,          sys_pwrite64),       // 181
//ZZ    LINX_(__NR_chown,             sys_chown16),        // 182
//ZZ    LINXY(__NR_capget,            sys_capget),         // 184
//ZZ 
//ZZ    LINX_(__NR_capset,            sys_capset),         // 185
//ZZ    GENXY(__NR_sigaltstack,       sys_sigaltstack),    // 186
//ZZ    LINXY(__NR_sendfile,          sys_sendfile),       // 187
//ZZ //   GENXY(__NR_getpmsg,           sys_getpmsg),        // 188
//ZZ //   GENX_(__NR_putpmsg,           sys_putpmsg),        // 189
//ZZ 
//ZZ    // Nb: we treat vfork as fork
//ZZ    GENX_(__NR_vfork,             sys_fork),           // 190
//ZZ    GENXY(__NR_ugetrlimit,        sys_getrlimit),      // 191
//ZZ    GENX_(__NR_truncate64,        sys_truncate64),     // 193
//ZZ    GENX_(__NR_ftruncate64,       sys_ftruncate64),    // 194
//ZZ    
//ZZ    PLAXY(__NR_stat64,            sys_stat64),         // 195
//ZZ    PLAXY(__NR_lstat64,           sys_lstat64),        // 196
//ZZ    PLAXY(__NR_fstat64,           sys_fstat64),        // 197
//ZZ    GENX_(__NR_lchown32,          sys_lchown),         // 198
//ZZ    GENX_(__NR_getuid32,          sys_getuid),         // 199
//ZZ 
//ZZ    GENX_(__NR_getgid32,          sys_getgid),         // 200
//ZZ    GENX_(__NR_geteuid32,         sys_geteuid),        // 201
//ZZ    GENX_(__NR_getegid32,         sys_getegid),        // 202
//ZZ    GENX_(__NR_setreuid32,        sys_setreuid),       // 203
//ZZ    GENX_(__NR_setregid32,        sys_setregid),       // 204
//ZZ 
//ZZ    GENXY(__NR_getgroups32,       sys_getgroups),      // 205
//ZZ    GENX_(__NR_setgroups32,       sys_setgroups),      // 206
//ZZ    GENX_(__NR_fchown32,          sys_fchown),         // 207
//ZZ    LINX_(__NR_setresuid32,       sys_setresuid),      // 208
//ZZ    LINXY(__NR_getresuid32,       sys_getresuid),      // 209
//ZZ 
//ZZ    LINX_(__NR_setresgid32,       sys_setresgid),      // 210
//ZZ    LINXY(__NR_getresgid32,       sys_getresgid),      // 211
//ZZ    GENX_(__NR_chown32,           sys_chown),          // 212
//ZZ    GENX_(__NR_setuid32,          sys_setuid),         // 213
//ZZ    GENX_(__NR_setgid32,          sys_setgid),         // 214
//ZZ 
//ZZ    LINX_(__NR_setfsuid32,        sys_setfsuid),       // 215
//ZZ    LINX_(__NR_setfsgid32,        sys_setfsgid),       // 216
//ZZ //zz    //   (__NR_pivot_root,        sys_pivot_root),     // 217 */Linux
//ZZ    GENXY(__NR_mincore,           sys_mincore),        // 218
//ZZ    GENX_(__NR_madvise,           sys_madvise),        // 219
//ZZ 
//ZZ    LINXY(__NR_fcntl64,           sys_fcntl64),        // 221
//ZZ //   GENX_(222,                    sys_ni_syscall),     // 222
//ZZ //   PLAXY(223,                    sys_syscall223),     // 223 // sys_bproc?
//ZZ 
//ZZ    LINX_(__NR_readahead,         sys_readahead),      // 225 */Linux
//ZZ    LINX_(__NR_setxattr,          sys_setxattr),       // 226
//ZZ    LINX_(__NR_lsetxattr,         sys_lsetxattr),      // 227
//ZZ    LINX_(__NR_fsetxattr,         sys_fsetxattr),      // 228
//ZZ 
//ZZ    LINXY(__NR_fgetxattr,         sys_fgetxattr),      // 231
//ZZ    LINXY(__NR_listxattr,         sys_listxattr),      // 232
//ZZ    LINXY(__NR_llistxattr,        sys_llistxattr),     // 233
//ZZ    LINXY(__NR_flistxattr,        sys_flistxattr),     // 234
//ZZ 
//ZZ    LINX_(__NR_removexattr,       sys_removexattr),    // 235
//ZZ    LINX_(__NR_lremovexattr,      sys_lremovexattr),   // 236
//ZZ    LINX_(__NR_fremovexattr,      sys_fremovexattr),   // 237
//ZZ    LINXY(__NR_tkill,             sys_tkill),          // 238 */Linux
//ZZ    LINXY(__NR_sendfile64,        sys_sendfile64),     // 239
//ZZ 
//ZZ    LINXY(__NR_futex,             sys_futex),             // 240
//ZZ    LINX_(__NR_sched_setaffinity, sys_sched_setaffinity), // 241
//ZZ    LINXY(__NR_sched_getaffinity, sys_sched_getaffinity), // 242
//ZZ //   PLAX_(__NR_set_thread_area,   sys_set_thread_area),   // 243
//ZZ //   PLAX_(__NR_get_thread_area,   sys_get_thread_area),   // 244
//ZZ 
//ZZ    LINXY(__NR_io_setup,          sys_io_setup),       // 245
//ZZ    LINX_(__NR_io_destroy,        sys_io_destroy),     // 246
//ZZ    LINXY(__NR_io_getevents,      sys_io_getevents),   // 247
//ZZ    LINX_(__NR_io_submit,         sys_io_submit),      // 248
//ZZ    LINXY(__NR_io_cancel,         sys_io_cancel),      // 249
//ZZ 
//ZZ //   LINX_(__NR_fadvise64,         sys_fadvise64),      // 250 */(Linux?)
//ZZ    GENX_(251,                    sys_ni_syscall),     // 251
//ZZ //   GENXY(__NR_lookup_dcookie,    sys_lookup_dcookie), // 253
//ZZ    LINXY(__NR_epoll_create,      sys_epoll_create),   // 254
//ZZ 
//ZZ    LINX_(__NR_epoll_ctl,         sys_epoll_ctl),         // 255
//ZZ    LINXY(__NR_epoll_wait,        sys_epoll_wait),        // 256
//ZZ //zz    //   (__NR_remap_file_pages,  sys_remap_file_pages),  // 257 */Linux
//ZZ    LINX_(__NR_set_tid_address,   sys_set_tid_address),   // 258
//ZZ    LINXY(__NR_timer_create,      sys_timer_create),      // 259
//ZZ 
//ZZ    LINXY(__NR_timer_settime,     sys_timer_settime),  // (timer_create+1)
//ZZ    LINXY(__NR_timer_gettime,     sys_timer_gettime),  // (timer_create+2)
//ZZ    LINX_(__NR_timer_getoverrun,  sys_timer_getoverrun),//(timer_create+3)
//ZZ    LINX_(__NR_timer_delete,      sys_timer_delete),   // (timer_create+4)
//ZZ    LINX_(__NR_clock_settime,     sys_clock_settime),  // (timer_create+5)
//ZZ 
//ZZ    LINXY(__NR_clock_getres,      sys_clock_getres),   // (timer_create+7)
//ZZ    LINXY(__NR_clock_nanosleep,   sys_clock_nanosleep),// (timer_create+8) */*
//ZZ    GENXY(__NR_statfs64,          sys_statfs64),       // 268
//ZZ    GENXY(__NR_fstatfs64,         sys_fstatfs64),      // 269
//ZZ 
//ZZ    GENX_(__NR_utimes,            sys_utimes),         // 271
//ZZ //   LINX_(__NR_fadvise64_64,      sys_fadvise64_64),   // 272 */(Linux?)
//ZZ    GENX_(__NR_vserver,           sys_ni_syscall),     // 273
//ZZ    LINX_(__NR_mbind,             sys_mbind),          // 274 ?/?
//ZZ 
//ZZ    LINXY(__NR_get_mempolicy,     sys_get_mempolicy),  // 275 ?/?
//ZZ    LINX_(__NR_set_mempolicy,     sys_set_mempolicy),  // 276 ?/?
//ZZ    LINXY(__NR_mq_open,           sys_mq_open),        // 277
//ZZ    LINX_(__NR_mq_unlink,         sys_mq_unlink),      // (mq_open+1)
//ZZ    LINX_(__NR_mq_timedsend,      sys_mq_timedsend),   // (mq_open+2)
//ZZ 
//ZZ    LINXY(__NR_mq_timedreceive,   sys_mq_timedreceive),// (mq_open+3)
//ZZ    LINX_(__NR_mq_notify,         sys_mq_notify),      // (mq_open+4)
//ZZ    LINXY(__NR_mq_getsetattr,     sys_mq_getsetattr),  // (mq_open+5)
//ZZ    LINXY(__NR_waitid,            sys_waitid),         // 280
//ZZ 
//ZZ    LINX_(__NR_bind,              sys_bind),           // 282
//ZZ    LINX_(__NR_listen,            sys_listen),         // 284
//ZZ    LINXY(__NR_accept,            sys_accept),         // 285
//ZZ    LINXY(__NR_getsockname,       sys_getsockname),    // 286
//ZZ    LINXY(__NR_getpeername,       sys_getpeername),    // 287
//ZZ    LINXY(__NR_socketpair,        sys_socketpair),     // 288
//ZZ    LINX_(__NR_send,              sys_send),
//ZZ    LINX_(__NR_sendto,            sys_sendto),         // 290
//ZZ    LINXY(__NR_recv,              sys_recv),
//ZZ    LINXY(__NR_recvfrom,          sys_recvfrom),       // 292
//ZZ    LINX_(__NR_shutdown,          sys_shutdown),       // 293
//ZZ    LINX_(__NR_setsockopt,        sys_setsockopt),     // 294
//ZZ    LINXY(__NR_getsockopt,        sys_getsockopt),     // 295
//ZZ    LINX_(__NR_sendmsg,           sys_sendmsg),        // 296
//ZZ    LINXY(__NR_recvmsg,           sys_recvmsg),        // 297
//ZZ    LINX_(__NR_semop,             sys_semop),          // 298 
//ZZ    LINX_(__NR_semget,            sys_semget),         // 299
//ZZ    LINXY(__NR_semctl,            sys_semctl),         // 300
//ZZ    LINX_(__NR_msgget,            sys_msgget),         
//ZZ    LINX_(__NR_msgsnd,            sys_msgsnd),          
//ZZ    LINXY(__NR_msgrcv,            sys_msgrcv),         
//ZZ    LINXY(__NR_msgctl,            sys_msgctl),         // 304
//ZZ    LINX_(__NR_semtimedop,        sys_semtimedop),     // 312
//ZZ 
//ZZ    LINX_(__NR_add_key,           sys_add_key),        // 286
//ZZ    LINX_(__NR_request_key,       sys_request_key),    // 287
//ZZ    LINXY(__NR_keyctl,            sys_keyctl),         // not 288...
//ZZ //   LINX_(__NR_ioprio_set,        sys_ioprio_set),     // 289
//ZZ 
//ZZ //   LINX_(__NR_ioprio_get,        sys_ioprio_get),     // 290
//ZZ    LINX_(__NR_inotify_init,    sys_inotify_init),   // 291
//ZZ    LINX_(__NR_inotify_add_watch, sys_inotify_add_watch), // 292
//ZZ    LINX_(__NR_inotify_rm_watch,    sys_inotify_rm_watch), // 293
//ZZ //   LINX_(__NR_migrate_pages,    sys_migrate_pages),    // 294
//ZZ 
//ZZ    LINX_(__NR_mknodat,       sys_mknodat),          // 297
//ZZ    LINX_(__NR_fchownat,       sys_fchownat),         // 298
//ZZ    LINX_(__NR_futimesat,    sys_futimesat),        // 326 on arm
//ZZ 
//ZZ    PLAXY(__NR_fstatat64,    sys_fstatat64),        // 300
//ZZ    LINX_(__NR_renameat,       sys_renameat),         // 302
//ZZ    LINX_(__NR_linkat,       sys_linkat),           // 303
//ZZ    LINX_(__NR_symlinkat,    sys_symlinkat),        // 304
//ZZ 
//ZZ    LINX_(__NR_fchmodat,       sys_fchmodat),         //
//ZZ    LINXY(__NR_shmat,         wrap_sys_shmat),       //305
//ZZ    LINXY(__NR_shmdt,             sys_shmdt),          //306 
//ZZ    LINX_(__NR_shmget,            sys_shmget),         //307 
//ZZ    LINXY(__NR_shmctl,            sys_shmctl),         // 308 
//ZZ //   LINX_(__NR_pselect6,       sys_pselect6),         //
//ZZ 
//ZZ //   LINX_(__NR_unshare,       sys_unshare),          // 310
//ZZ    LINX_(__NR_set_robust_list,    sys_set_robust_list),  // 311
//ZZ    LINXY(__NR_get_robust_list,    sys_get_robust_list),  // 312
//ZZ //   LINX_(__NR_splice,            sys_ni_syscall),       // 313
//ZZ //   LINX_(__NR_sync_file_range,   sys_sync_file_range),  // 314
//ZZ 
//ZZ //   LINX_(__NR_tee,               sys_ni_syscall),       // 315
//ZZ //   LINX_(__NR_vmsplice,          sys_ni_syscall),       // 316
//ZZ    LINXY(__NR_move_pages,        sys_move_pages),       // 317
//ZZ //   LINX_(__NR_getcpu,            sys_ni_syscall),       // 318
//ZZ 
//ZZ    LINX_(__NR_utimensat,         sys_utimensat),        // 320
//ZZ    LINXY(__NR_signalfd,          sys_signalfd),         // 321
//ZZ    LINXY(__NR_timerfd_create,    sys_timerfd_create),   // 322
//ZZ    LINXY(__NR_eventfd,           sys_eventfd),          // 323
//ZZ 
//ZZ    LINXY(__NR_timerfd_settime,   sys_timerfd_settime),  // 325
//ZZ    LINXY(__NR_timerfd_gettime,   sys_timerfd_gettime),   // 326
//ZZ 
//ZZ    ///////////////
//ZZ 
//ZZ    // JRS 2010-Jan-03: I believe that all the numbers listed 
//ZZ    // in comments in the table prior to this point (eg "// 326",
//ZZ    // etc) are bogus since it looks to me like they are copied
//ZZ    // verbatim from syswrap-x86-linux.c and they certainly do not
//ZZ    // correspond to what's in include/vki/vki-scnums-arm-linux.h.
//ZZ    // From here onwards, please ensure the numbers are correct.
//ZZ 
//ZZ    LINX_(__NR_pselect6,          sys_pselect6),         // 335
//ZZ    LINXY(__NR_ppoll,             sys_ppoll),            // 336
//ZZ 
//ZZ    LINXY(__NR_epoll_pwait,       sys_epoll_pwait),      // 346
//ZZ 
//ZZ    LINX_(__NR_fallocate,         sys_fallocate),        // 352
//ZZ 
//ZZ    LINXY(__NR_signalfd4,         sys_signalfd4),        // 355
//ZZ    LINXY(__NR_eventfd2,          sys_eventfd2),         // 356
//ZZ    LINXY(__NR_epoll_create1,     sys_epoll_create1),    // 357
//ZZ    LINXY(__NR_inotify_init1,     sys_inotify_init1),    // 360
//ZZ    LINXY(__NR_preadv,            sys_preadv),           // 361
//ZZ    LINX_(__NR_pwritev,           sys_pwritev),          // 362
//ZZ    LINXY(__NR_rt_tgsigqueueinfo, sys_rt_tgsigqueueinfo),// 363
//ZZ    LINXY(__NR_perf_event_open,   sys_perf_event_open),  // 364
//ZZ 
//ZZ    LINXY(__NR_accept4,           sys_accept4),          // 366
//ZZ 
//ZZ    LINXY(__NR_name_to_handle_at, sys_name_to_handle_at),// 370
//ZZ    LINXY(__NR_open_by_handle_at, sys_open_by_handle_at),// 371
//ZZ    LINXY(__NR_clock_adjtime,     sys_clock_adjtime)     // 372
};


//ZZ /* These are not in the main table because there indexes are not small
//ZZ    integers, but rather values close to one million.  So their
//ZZ    inclusion would force the main table to be huge (about 8 MB). */
//ZZ 
//ZZ static SyscallTableEntry ste___ARM_set_tls
//ZZ    = { WRAPPER_PRE_NAME(arm_linux,sys_set_tls), NULL };
//ZZ 
//ZZ static SyscallTableEntry ste___ARM_cacheflush
//ZZ    = { WRAPPER_PRE_NAME(arm_linux,sys_cacheflush), NULL };

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;
   }

//ZZ    /* Check if it's one of the out-of-line entries. */
//ZZ    switch (sysno) {
//ZZ       case __NR_ARM_set_tls:    return &ste___ARM_set_tls;
//ZZ       case __NR_ARM_cacheflush: return &ste___ARM_cacheflush;
//ZZ       default: break;
//ZZ    }

   /* Can't find a wrapper */
   return NULL;
}

#endif // defined(VGP_arm64_linux)

/*--------------------------------------------------------------------*/
/*--- end                                    syswrap-arm64-linux.c ---*/
/*--------------------------------------------------------------------*/