File: syswrap-s390x-linux.c

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/*--------------------------------------------------------------------*/
/*--- Platform-specific syscalls stuff.      syswrap-s390x-linux.c ---*/
/*--------------------------------------------------------------------*/

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

   Copyright IBM Corp. 2010-2017

   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.
*/

/* Contributed by Christian Borntraeger */

#if defined(VGP_s390x_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_mallocfree.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 "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-linux-variants.h" /* decls of linux variant wrappers */
#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.
   Thought: Why are we clearing the GPRs ? The callee pointed to by f
   is a regular C function which will play by the ABI rules. So there is
   no need to zero out the GPRs. If we assumed that f accesses registers at
   will, then it would make sense to create a defined register state.
   But then, why only for the GPRs and not the FPRs ? */
__attribute__((noreturn))
void ML_(call_on_new_stack_0_1) ( Addr stack,
                                  Addr retaddr,
                                  void (*f)(Word),
                                  Word arg1 );
/* Upon entering this function we have the following setup:
     r2 = stack
     r3 = retaddr
     r4 = f_desc
     r5 = arg1
*/
asm(
    ".text\n"
    ".align 4\n"
    ".globl vgModuleLocal_call_on_new_stack_0_1\n"
    ".type vgModuleLocal_call_on_new_stack_0_1, @function\n"
    "vgModuleLocal_call_on_new_stack_0_1:\n"
    "   lgr %r15,%r2\n"     // stack to r15
    "   lgr %r14,%r3\n"     // retaddr to r14
    "   lgr %r2,%r5\n"      // arg1 to r2
    // zero all gprs to get a defined state
    "   lghi  %r0,0\n"
    "   lghi  %r1,0\n"
    // r2 holds the argument for the callee
    "   lghi  %r3,0\n"
    // r4 holds the callee address
    "   lghi  %r5,0\n"
    "   lghi  %r6,0\n"
    "   lghi  %r7,0\n"
    "   lghi  %r8,0\n"
    "   lghi  %r9,0\n"
    "   lghi  %r10,0\n"
    "   lghi  %r11,0\n"
    "   lghi  %r12,0\n"
    "   lghi  %r13,0\n"
    // r14 holds the return address for the callee
    // r15 is the stack pointer
    "   br  %r4\n"          // jump to f
    ".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:
            void*  child_stack   in r2
            long   flags         in r3
            int*   parent_tid    in r4
            int*   child_tid     in r5
            int*   tls address   in r6
            Word   (*fn)(void *) 160(r15)
            void   *arg          168(r15)

        System call requires:
            void*  child_stack  in r2  (sc arg1)
            long   flags        in r3  (sc arg2)
            int*   parent_tid   in r4  (sc arg3)
            int*   child_tid    in r5  (sc arg4)
            void*  tlsaddr      in r6  (sc arg5)

        Returns a ULong encoded as: top half is %cr following syscall,
        low half is syscall return value (r3).
 */
#define __NR_CLONE        VG_STRINGIFY(__NR_clone)
#define __NR_EXIT         VG_STRINGIFY(__NR_exit)

// See priv_syswrap-linux.h for arg profile.
asm(
   "   .text\n"
   "   .align  4\n"
   ".globl do_syscall_clone_s390x_linux\n"
   "do_syscall_clone_s390x_linux:\n"
   "   lg    %r1, 160(%r15)\n"   // save fn from parent stack into r1
   "   lg    %r0, 168(%r15)\n"   // save arg from parent stack into r0
   "   aghi  %r2, -160\n"        // create stack frame for child
   // all syscall parameters are already in place (r2-r6)
   "   svc " __NR_CLONE"\n"        // clone()
   "   ltgr  %r2,%r2\n"           // child if retval == 0
   "   jne   1f\n"

   // CHILD - call thread function
   "   lgr   %r2, %r0\n"            // get arg from r0
   "   basr  %r14,%r1\n"            // call fn

   // exit. The result is already in r2
   "   svc " __NR_EXIT"\n"

   // Exit returned?!
   "   j +2\n"

   "1:\n"  // PARENT or ERROR
   "   br %r14\n"
   ".previous\n"
);

#undef __NR_CLONE
#undef __NR_EXIT

void VG_(cleanup_thread) ( ThreadArchState* arch )
{
  /* only used on x86 for descriptor tables */
}

/* ---------------------------------------------------------------------
   PRE/POST wrappers for s390x/Linux-specific syscalls
   ------------------------------------------------------------------ */

#define PRE(name)       DEFN_PRE_TEMPLATE(s390x_linux, name)
#define POST(name)      DEFN_POST_TEMPLATE(s390x_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(s390x_linux, sys_ptrace);
DECL_TEMPLATE(s390x_linux, sys_mmap);
DECL_TEMPLATE(s390x_linux, sys_sigreturn);
DECL_TEMPLATE(s390x_linux, sys_rt_sigreturn);
DECL_TEMPLATE(s390x_linux, sys_fadvise64);

/* PEEK TEXT,DATA and USER are common to all architectures.
   PEEKUSR_AREA and POKEUSR_AREA are special, having a memory area
   containing the real addr, data, and len field pointed to by ARG3
   instead of ARG4.
   GETREGSET and SETREGSET use a struct iovec (pointed to by ARG4) for
   the address and size of the user buffer. */

PRE(sys_ptrace)
{
   PRINT("sys_ptrace ( %ld, %ld, %#lx, %#lx )", SARG1, SARG2, ARG3, ARG4);
   PRE_REG_READ4(int, "ptrace",
                 long, request, long, pid, unsigned long, addr,
                 unsigned long, data);
   switch (ARG1) {
   case VKI_PTRACE_PEEKTEXT:
   case VKI_PTRACE_PEEKDATA:
   case VKI_PTRACE_PEEKUSR:
      PRE_MEM_WRITE( "ptrace(peek)", ARG4,
		     sizeof (long));
      break;
   case VKI_PTRACE_GETEVENTMSG:
      PRE_MEM_WRITE( "ptrace(geteventmsg)", ARG4, sizeof(unsigned long));
      break;
   case VKI_PTRACE_GETSIGINFO:
      PRE_MEM_WRITE( "ptrace(getsiginfo)", ARG4, sizeof(vki_siginfo_t));
      break;
   case VKI_PTRACE_SETSIGINFO:
      PRE_MEM_READ( "ptrace(setsiginfo)", ARG4, sizeof(vki_siginfo_t));
      break;
   case VKI_PTRACE_PEEKUSR_AREA:
      {
         vki_ptrace_area *pa;

         /* Reads a part of the user area into memory at pa->process_addr */
	 pa = (vki_ptrace_area *) ARG3;
         PRE_MEM_READ("ptrace(peekusrarea ptrace_area->len)",
                      (unsigned long) &pa->vki_len, sizeof(pa->vki_len));
         PRE_MEM_READ("ptrace(peekusrarea ptrace_area->kernel_addr)",
                      (unsigned long) &pa->vki_kernel_addr, sizeof(pa->vki_kernel_addr));
         PRE_MEM_READ("ptrace(peekusrarea ptrace_area->process_addr)",
                      (unsigned long) &pa->vki_process_addr, sizeof(pa->vki_process_addr));
         PRE_MEM_WRITE("ptrace(peekusrarea *(ptrace_area->process_addr))",
                       pa->vki_process_addr, pa->vki_len);
         break;
      }
   case VKI_PTRACE_POKEUSR_AREA:
      {
         vki_ptrace_area *pa;

         /* Updates a part of the user area from memory at pa->process_addr */
	 pa = (vki_ptrace_area *) ARG3;
         PRE_MEM_READ("ptrace(pokeusrarea ptrace_area->len)",
                      (unsigned long) &pa->vki_len, sizeof(pa->vki_len));
         PRE_MEM_READ("ptrace(pokeusrarea ptrace_area->kernel_addr)",
                      (unsigned long) &pa->vki_kernel_addr,
                      sizeof(pa->vki_kernel_addr));
         PRE_MEM_READ("ptrace(pokeusrarea ptrace_area->process_addr)",
                      (unsigned long) &pa->vki_process_addr,
                      sizeof(pa->vki_process_addr));
         PRE_MEM_READ("ptrace(pokeusrarea *(ptrace_area->process_addr))",
                       pa->vki_process_addr, pa->vki_len);
         break;
      }
   case VKI_PTRACE_GETREGSET:
      ML_(linux_PRE_getregset)(tid, ARG3, ARG4);
      break;
   case VKI_PTRACE_SETREGSET:
      ML_(linux_PRE_setregset)(tid, ARG3, ARG4);
      break;
   default:
      break;
   }
}

POST(sys_ptrace)
{
   switch (ARG1) {
   case VKI_PTRACE_TRACEME:
      ML_(linux_POST_traceme)(tid);
      break;
   case VKI_PTRACE_PEEKTEXT:
   case VKI_PTRACE_PEEKDATA:
   case VKI_PTRACE_PEEKUSR:
      POST_MEM_WRITE( ARG4, sizeof (long));
      break;
   case VKI_PTRACE_GETEVENTMSG:
      POST_MEM_WRITE( ARG4, sizeof(unsigned long));
      break;
   case VKI_PTRACE_GETSIGINFO:
      /* XXX: This is a simplification. Different parts of the
       * siginfo_t are valid depending on the type of signal.
       */
      POST_MEM_WRITE( ARG4, sizeof(vki_siginfo_t));
      break;
   case VKI_PTRACE_PEEKUSR_AREA:
      {
         vki_ptrace_area *pa;

	 pa = (vki_ptrace_area *) ARG3;
         POST_MEM_WRITE(pa->vki_process_addr, pa->vki_len);
	 break;
      }
   case VKI_PTRACE_GETREGSET:
      ML_(linux_POST_getregset)(tid, ARG3, ARG4);
      break;
   default:
      break;
   }
}

PRE(sys_mmap)
{
   UWord a0, a1, a2, a3, a4, a5;
   SysRes r;

   UWord* args = (UWord*)ARG1;
   PRE_REG_READ1(long, "sys_mmap", struct mmap_arg_struct *, args);
   PRE_MEM_READ( "sys_mmap(args)", (Addr) args, 6*sizeof(UWord) );

   a0 = args[0];
   a1 = args[1];
   a2 = args[2];
   a3 = args[3];
   a4 = args[4];
   a5 = args[5];

   PRINT("sys_mmap ( %#lx, %lu, %ld, %ld, %ld, %ld )",
         a0, a1, (Word)a2, (Word)a3, (Word)a4, (Word)a5 );

   r = ML_(generic_PRE_sys_mmap)( tid, a0, a1, a2, a3, a4, (Off64T)a5 );
   SET_STATUS_from_SysRes(r);
}

PRE(sys_sigreturn)
{
   ThreadState* tst;
   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));

   tst = VG_(get_ThreadState)(tid);

   /* This is only so that the IA is (might be) useful to report if
      something goes wrong in the sigreturn */
   ML_(fixup_guest_state_to_restart_syscall)(&tst->arch);

   /* Restore register state from frame and remove it */
   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)
{
   /* See comments on PRE(sys_rt_sigreturn) in syswrap-amd64-linux.c for
      an explanation of what follows. */

   ThreadState* tst;
   PRINT("sys_rt_sigreturn ( )");

   vg_assert(VG_(is_valid_tid)(tid));
   vg_assert(tid >= 1 && tid < VG_N_THREADS);
   vg_assert(VG_(is_running_thread)(tid));

   tst = VG_(get_ThreadState)(tid);

   /* This is only so that the IA is (might be) useful to report if
      something goes wrong in the sigreturn */
   ML_(fixup_guest_state_to_restart_syscall)(&tst->arch);

   /* 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;
}

/* we cant use the LINX_ version for 64 bit */
PRE(sys_fadvise64)
{
   PRINT("sys_fadvise64 ( %ld, %ld, %ld, %ld )", SARG1, SARG2, SARG3, SARG4);
   PRE_REG_READ4(long, "fadvise64",
                 int, fd, vki_loff_t, offset, vki_loff_t, len, int, advice);
}

#undef PRE
#undef POST

/* ---------------------------------------------------------------------
   The s390x/Linux syscall table
   ------------------------------------------------------------------ */

/* Add an s390x-linux specific wrapper to a syscall table. */
#define PLAX_(sysno, name)    WRAPPER_ENTRY_X_(s390x_linux, sysno, name)
#define PLAXY(sysno, name)    WRAPPER_ENTRY_XY(s390x_linux, sysno, name)

// This table maps from __NR_xxx syscall numbers from
// linux/arch/s390/kernel/syscalls.S to the appropriate PRE/POST sys_foo()
// wrappers on s390x. There are several unused numbers, which are only
// defined on s390 (31bit mode) but no longer available on s390x (64 bit).
// For those syscalls not handled by Valgrind, the annotation indicate its
// arch/OS combination, eg. */* (generic), */Linux (Linux only), ?/?
// (unknown).

static SyscallTableEntry syscall_table[] = {
   GENX_(0, sys_ni_syscall), /* unimplemented (by the kernel) */      // 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
// ?????(__NR_restart_syscall, ),                                     // 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
   GENX_(13, sys_ni_syscall), /* unimplemented (by the kernel) */     // 13
   GENX_(__NR_mknod,  sys_mknod),                                     // 14

   GENX_(__NR_chmod,  sys_chmod),                                     // 15
   GENX_(16, sys_ni_syscall), /* unimplemented (by the kernel) */     // 16
   GENX_(17, sys_ni_syscall), /* unimplemented (by the kernel) */     // 17
   GENX_(18, sys_ni_syscall), /* unimplemented (by the kernel) */     // 18
   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_(23, sys_ni_syscall), /* unimplemented (by the kernel) */     // 23
   GENX_(24, sys_ni_syscall), /* unimplemented (by the kernel) */     // 24

   GENX_(25, sys_ni_syscall), /* unimplemented (by the kernel) */     // 25
   PLAXY(__NR_ptrace, sys_ptrace),                                    // 26
   GENX_(__NR_alarm,  sys_alarm),                                     // 27
   GENX_(28, sys_ni_syscall), /* unimplemented (by the kernel) */     // 28
   GENX_(__NR_pause,  sys_pause),                                     // 29

   LINX_(__NR_utime,  sys_utime),                                     // 30
   GENX_(31, sys_ni_syscall), /* unimplemented (by the kernel) */     // 31
   GENX_(32, sys_ni_syscall), /* unimplemented (by the kernel) */     // 32
   GENX_(__NR_access,  sys_access),                                   // 33
   GENX_(__NR_nice, sys_nice),                                        // 34

   GENX_(35, sys_ni_syscall), /* unimplemented (by the kernel) */     // 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
   LINXY(__NR_pipe,  sys_pipe),                                       // 42
   GENXY(__NR_times,  sys_times),                                     // 43
   GENX_(44, sys_ni_syscall), /* unimplemented (by the kernel) */     // 44

   GENX_(__NR_brk,  sys_brk),                                         // 45
   GENX_(46, sys_ni_syscall), /* unimplemented (by the kernel) */     // 46
   GENX_(47, sys_ni_syscall), /* unimplemented (by the kernel) */     // 47
// ?????(__NR_signal, ),                                              // 48
   GENX_(49, sys_ni_syscall), /* unimplemented (by the kernel) */     // 49

   GENX_(50, sys_ni_syscall), /* unimplemented (by the kernel) */     // 50
   GENX_(__NR_acct, sys_acct),                                        // 51
   LINX_(__NR_umount2, sys_umount),                                   // 52
   GENX_(53, sys_ni_syscall), /* unimplemented (by the kernel) */     // 53
   LINXY(__NR_ioctl,  sys_ioctl),                                     // 54

   LINXY(__NR_fcntl,  sys_fcntl),                                     // 55
   GENX_(56, sys_ni_syscall), /* unimplemented (by the kernel) */     // 56
   GENX_(__NR_setpgid,  sys_setpgid),                                 // 57
   GENX_(58, sys_ni_syscall), /* unimplemented (by the kernel) */     // 58
   GENX_(59, sys_ni_syscall), /* unimplemented (by the kernel) */     // 59

   GENX_(__NR_umask,  sys_umask),                                     // 60
   GENX_(__NR_chroot,  sys_chroot),                                   // 61
// ?????(__NR_ustat, sys_ustat), /* deprecated in favor of statfs */  // 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
// ?????(__NR_sigaction, ),   /* userspace uses rt_sigaction */       // 67
   GENX_(68, sys_ni_syscall), /* unimplemented (by the kernel) */     // 68
   GENX_(69, sys_ni_syscall), /* unimplemented (by the kernel) */     // 69

   GENX_(70, sys_ni_syscall), /* unimplemented (by the kernel) */     // 70
   GENX_(71, sys_ni_syscall), /* unimplemented (by the kernel) */     // 71
// ?????(__NR_sigsuspend, ),                                          // 72
// ?????(__NR_sigpending, ),                                          // 73
// ?????(__NR_sethostname, ),                                         // 74

   GENX_(__NR_setrlimit,  sys_setrlimit),                             // 75
   GENXY(76,  sys_getrlimit), /* see also 191 */                      // 76
   GENXY(__NR_getrusage,  sys_getrusage),                             // 77
   GENXY(__NR_gettimeofday,  sys_gettimeofday),                       // 78
   GENX_(__NR_settimeofday, sys_settimeofday),                        // 79

   GENX_(80, sys_ni_syscall), /* unimplemented (by the kernel) */     // 80
   GENX_(81, sys_ni_syscall), /* unimplemented (by the kernel) */     // 81
   GENX_(82, sys_ni_syscall), /* unimplemented (by the kernel) */     // 82
   GENX_(__NR_symlink,  sys_symlink),                                 // 83
   GENX_(84, sys_ni_syscall), /* unimplemented (by the kernel) */     // 84

   GENX_(__NR_readlink,  sys_readlink),                               // 85
// ?????(__NR_uselib, ),                                              // 86
// ?????(__NR_swapon, ),                                              // 87
// ?????(__NR_reboot, ),                                              // 88
   GENX_(89, sys_ni_syscall), /* unimplemented (by the kernel) */     // 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_(95, sys_ni_syscall), /* unimplemented (by the kernel) */     // 95
   GENX_(__NR_getpriority, sys_getpriority),                          // 96
   GENX_(__NR_setpriority, sys_setpriority),                          // 97
   GENX_(98, sys_ni_syscall), /* unimplemented (by the kernel) */     // 98
   GENXY(__NR_statfs,  sys_statfs),                                   // 99

   GENXY(__NR_fstatfs,  sys_fstatfs),                                 // 100
   GENX_(101, sys_ni_syscall), /* unimplemented (by the kernel) */    // 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
   GENX_(109, sys_ni_syscall), /* unimplemented (by the kernel) */    // 109

   LINXY(__NR_lookup_dcookie, sys_lookup_dcookie),                    // 110
   LINX_(__NR_vhangup, sys_vhangup),                                  // 111
   GENX_(112, sys_ni_syscall), /* unimplemented (by the kernel) */    // 112
   GENX_(113, sys_ni_syscall), /* unimplemented (by the kernel) */    // 113
   GENXY(__NR_wait4,  sys_wait4),                                     // 114

// ?????(__NR_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

   LINX_(__NR_clone,  sys_clone),                                     // 120
// ?????(__NR_setdomainname, ),                                       // 121
   GENXY(__NR_uname, sys_newuname),                                   // 122
   GENX_(123, sys_ni_syscall), /* unimplemented (by the kernel) */    // 123
// ?????(__NR_adjtimex, ),                                            // 124

   GENXY(__NR_mprotect,  sys_mprotect),                               // 125
// LINXY(__NR_sigprocmask, sys_sigprocmask),                          // 126
   GENX_(127, sys_ni_syscall), /* unimplemented (by the kernel) */    // 127
   LINX_(__NR_init_module,  sys_init_module),                         // 128
   LINX_(__NR_delete_module,  sys_delete_module),                     // 129

   GENX_(130, sys_ni_syscall), /* unimplemented (by the kernel) */    // 130
   LINX_(__NR_quotactl, sys_quotactl),                                // 131
   GENX_(__NR_getpgid,  sys_getpgid),                                 // 132
   GENX_(__NR_fchdir,  sys_fchdir),                                   // 133
// ?????(__NR_bdflush, ),                                             // 134

// ?????(__NR_sysfs, ),                                               // 135
   LINX_(__NR_personality, sys_personality),                          // 136
   GENX_(137, sys_ni_syscall), /* unimplemented (by the kernel) */    // 137
   GENX_(138, sys_ni_syscall), /* unimplemented (by the kernel) */    // 138
   GENX_(139, sys_ni_syscall), /* unimplemented (by the kernel) */    // 139

// LINXY(__NR__llseek, sys_llseek), /* 64 bit --> lseek */            // 140
   GENXY(__NR_getdents,  sys_getdents),                               // 141
   GENX_(__NR_select, 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
   GENX_(__NR_getsid, sys_getsid),                                    // 147
   GENX_(__NR_fdatasync,  sys_fdatasync),                             // 148
   LINXY(__NR__sysctl, sys_sysctl),                                   // 149

   GENX_(__NR_mlock,  sys_mlock),                                     // 150
   GENX_(__NR_munlock,  sys_munlock),                                 // 151
   GENX_(__NR_mlockall,  sys_mlockall),                               // 152
   LINX_(__NR_munlockall,  sys_munlockall),                           // 153
   LINXY(__NR_sched_setparam,  sys_sched_setparam),                   // 154

   LINXY(__NR_sched_getparam,  sys_sched_getparam),                   // 155
   LINX_(__NR_sched_setscheduler,  sys_sched_setscheduler),           // 156
   LINX_(__NR_sched_getscheduler,  sys_sched_getscheduler),           // 157
   LINX_(__NR_sched_yield,  sys_sched_yield),                         // 158
   LINX_(__NR_sched_get_priority_max,  sys_sched_get_priority_max),   // 159

   LINX_(__NR_sched_get_priority_min,  sys_sched_get_priority_min),   // 160
   LINXY(__NR_sched_rr_get_interval, sys_sched_rr_get_interval),      // 162
   GENXY(__NR_nanosleep,  sys_nanosleep),                             // 162
   GENX_(__NR_mremap,  sys_mremap),                                   // 163
   GENX_(164, sys_ni_syscall), /* unimplemented (by the kernel) */    // 164

   GENX_(165, sys_ni_syscall), /* unimplemented (by the kernel) */    // 165
   GENX_(166, sys_ni_syscall), /* unimplemented (by the kernel) */    // 166
   GENX_(167, sys_ni_syscall), /* unimplemented (by the kernel) */    // 167
   GENXY(__NR_poll,  sys_poll),                                       // 168
// ?????(__NR_nfsservctl, ),                                          // 169

   GENX_(170, sys_ni_syscall), /* unimplemented (by the kernel) */    // 170
   GENX_(171, sys_ni_syscall), /* unimplemented (by the kernel) */    // 171
   LINXY(__NR_prctl, sys_prctl),                                      // 172
   PLAX_(__NR_rt_sigreturn,  sys_rt_sigreturn),                       // 173
   LINXY(__NR_rt_sigaction,  sys_rt_sigaction),                       // 174

   LINXY(__NR_rt_sigprocmask,  sys_rt_sigprocmask),                   // 175
   LINXY(__NR_rt_sigpending, sys_rt_sigpending),                      // 176
   LINXY(__NR_rt_sigtimedwait,  sys_rt_sigtimedwait),                 // 177
   LINXY(__NR_rt_sigqueueinfo, sys_rt_sigqueueinfo),                  // 178
   LINX_(__NR_rt_sigsuspend, sys_rt_sigsuspend),                      // 179

   GENXY(__NR_pread64,  sys_pread64),                                 // 180
   GENX_(__NR_pwrite64, sys_pwrite64),                                // 181
   GENX_(182, sys_ni_syscall), /* unimplemented (by the kernel) */    // 182
   GENXY(__NR_getcwd,  sys_getcwd),                                   // 183
   LINXY(__NR_capget,  sys_capget),                                   // 184

   LINX_(__NR_capset,  sys_capset),                                   // 185
   GENXY(__NR_sigaltstack,  sys_sigaltstack),                         // 186
   LINXY(__NR_sendfile, sys_sendfile),                                // 187
   GENX_(188, sys_ni_syscall), /* unimplemented (by the kernel) */    // 188
   GENX_(189, sys_ni_syscall), /* unimplemented (by the kernel) */    // 189

   GENX_(__NR_vfork,  sys_fork),                                      // 190
   GENXY(__NR_getrlimit,  sys_getrlimit),                             // 191
   GENX_(192, sys_ni_syscall), /* not exported on 64bit*/             // 192
   GENX_(193, sys_ni_syscall), /* unimplemented (by the kernel) */    // 193
   GENX_(194, sys_ni_syscall), /* unimplemented (by the kernel) */    // 194

   GENX_(195, sys_ni_syscall), /* unimplemented (by the kernel) */    // 195
   GENX_(196, sys_ni_syscall), /* unimplemented (by the kernel) */    // 196
   GENX_(197, sys_ni_syscall), /* unimplemented (by the kernel) */    // 197
   GENX_(__NR_lchown, sys_lchown),                                    // 198
   GENX_(__NR_getuid, sys_getuid),                                    // 199

   GENX_(__NR_getgid, sys_getgid),                                    // 200
   GENX_(__NR_geteuid, sys_geteuid),                                  // 201
   GENX_(__NR_getegid, sys_getegid),                                  // 202
   GENX_(__NR_setreuid, sys_setreuid),                                // 203
   GENX_(__NR_setregid, sys_setregid),                                // 204

   GENXY(__NR_getgroups, sys_getgroups),                              // 205
   GENX_(__NR_setgroups, sys_setgroups),                              // 206
   GENX_(__NR_fchown, sys_fchown),                                    // 207
   LINX_(__NR_setresuid, sys_setresuid),                              // 208
   LINXY(__NR_getresuid, sys_getresuid),                              // 209

   LINX_(__NR_setresgid, sys_setresgid),                              // 210
   LINXY(__NR_getresgid, sys_getresgid),                              // 211
   GENX_(__NR_chown, sys_chown),                                      // 212
   GENX_(__NR_setuid, sys_setuid),                                    // 213
   GENX_(__NR_setgid, sys_setgid),                                    // 214

   LINX_(__NR_setfsuid, sys_setfsuid),                                // 215
   LINX_(__NR_setfsgid, sys_setfsgid),                                // 216
   LINX_(__NR_pivot_root, sys_pivot_root),                            // 217
   GENXY(__NR_mincore, sys_mincore),                                  // 218
   GENX_(__NR_madvise,  sys_madvise),                                 // 219

   GENXY(__NR_getdents64,  sys_getdents64),                           // 220
   GENX_(221, sys_ni_syscall), /* unimplemented (by the kernel) */    // 221
   LINX_(__NR_readahead, sys_readahead),                              // 222
   GENX_(223, sys_ni_syscall), /* unimplemented (by the kernel) */    // 223
   LINX_(__NR_setxattr, sys_setxattr),                                // 224

   LINX_(__NR_lsetxattr, sys_lsetxattr),                              // 225
   LINX_(__NR_fsetxattr, sys_fsetxattr),                              // 226
   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
   LINX_(__NR_gettid,  sys_gettid),                                   // 236
   LINXY(__NR_tkill, sys_tkill),                                      // 237
   LINXY(__NR_futex,  sys_futex),                                     // 238
   LINX_(__NR_sched_setaffinity,  sys_sched_setaffinity),             // 239

   LINXY(__NR_sched_getaffinity,  sys_sched_getaffinity),             // 240
   LINXY(__NR_tgkill, sys_tgkill),                                    // 241
   GENX_(242, sys_ni_syscall), /* unimplemented (by the kernel) */    // 242
   LINXY(__NR_io_setup, sys_io_setup),                                // 243
   LINX_(__NR_io_destroy,  sys_io_destroy),                           // 244

   LINXY(__NR_io_getevents,  sys_io_getevents),                       // 245
   LINX_(__NR_io_submit,  sys_io_submit),                             // 246
   LINXY(__NR_io_cancel,  sys_io_cancel),                             // 247
   LINX_(__NR_exit_group,  sys_exit_group),                           // 248
   LINXY(__NR_epoll_create,  sys_epoll_create),                       // 249

   LINX_(__NR_epoll_ctl,  sys_epoll_ctl),                             // 250
   LINXY(__NR_epoll_wait,  sys_epoll_wait),                           // 251
   LINX_(__NR_set_tid_address,  sys_set_tid_address),                 // 252
   PLAX_(__NR_fadvise64, sys_fadvise64),                              // 253
   LINXY(__NR_timer_create,  sys_timer_create),                       // 254

   LINXY(__NR_timer_settime,  sys_timer_settime),                     // 255
   LINXY(__NR_timer_gettime,  sys_timer_gettime),                     // 256
   LINX_(__NR_timer_getoverrun,  sys_timer_getoverrun),               // 257
   LINX_(__NR_timer_delete,  sys_timer_delete),                       // 258
   LINX_(__NR_clock_settime,  sys_clock_settime),                     // 259

   LINXY(__NR_clock_gettime,  sys_clock_gettime),                     // 260
   LINXY(__NR_clock_getres,  sys_clock_getres),                       // 261
   LINXY(__NR_clock_nanosleep,  sys_clock_nanosleep),                 // 262
   GENX_(263, sys_ni_syscall), /* unimplemented (by the kernel) */    // 263
   GENX_(264, sys_ni_syscall), /* unimplemented (by the kernel) */    // 264

   GENXY(__NR_statfs64, sys_statfs64),                                // 265
   GENXY(__NR_fstatfs64, sys_fstatfs64),                              // 266
// ?????(__NR_remap_file_pages, ),
   GENX_(268, sys_ni_syscall), /* unimplemented (by the kernel) */    // 268
   GENX_(269, sys_ni_syscall), /* unimplemented (by the kernel) */    // 269

   GENX_(270, sys_ni_syscall), /* unimplemented (by the kernel) */    // 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
// ?????(__NR_kexec_load, ),
   LINX_(__NR_add_key,  sys_add_key),                                 // 278
   LINX_(__NR_request_key,  sys_request_key),                         // 279

   LINXY(__NR_keyctl,  sys_keyctl),                                   // 280
   LINXY(__NR_waitid, sys_waitid),                                    // 281
   LINX_(__NR_ioprio_set,  sys_ioprio_set),                           // 282
   LINX_(__NR_ioprio_get,  sys_ioprio_get),                           // 283
   LINX_(__NR_inotify_init,  sys_inotify_init),                       // 284

   LINX_(__NR_inotify_add_watch,  sys_inotify_add_watch),             // 285
   LINX_(__NR_inotify_rm_watch,  sys_inotify_rm_watch),               // 286
   GENX_(287, sys_ni_syscall), /* unimplemented (by the kernel) */    // 287
   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
   LINXY(__NR_newfstatat, sys_newfstatat),                            // 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_pselect6, sys_pselect6),                                // 301
   LINXY(__NR_ppoll, sys_ppoll),                                      // 302
   LINX_(__NR_unshare, sys_unshare),                                  // 303
   LINX_(__NR_set_robust_list,  sys_set_robust_list),                 // 304

   LINXY(__NR_get_robust_list,  sys_get_robust_list),                 // 305
   LINX_(__NR_splice, sys_splice),                                    // 306
   LINX_(__NR_sync_file_range, sys_sync_file_range),                  // 307
   LINX_(__NR_tee, sys_tee),                                          // 308
   LINXY(__NR_vmsplice, sys_vmsplice),                                // 309

   GENX_(310, sys_ni_syscall), /* unimplemented (by the kernel) */    // 310
   LINXY(__NR_getcpu, sys_getcpu),                                    // 311
   LINXY(__NR_epoll_pwait,  sys_epoll_pwait),                         // 312
   GENX_(__NR_utimes, sys_utimes),                                    // 313
   LINX_(__NR_fallocate, sys_fallocate),                              // 314

   LINX_(__NR_utimensat,  sys_utimensat),                             // 315
   LINXY(__NR_signalfd,  sys_signalfd),                               // 316
   GENX_(317, sys_ni_syscall), /* unimplemented (by the kernel) */    // 317
   LINXY(__NR_eventfd,  sys_eventfd),                                 // 318
   LINXY(__NR_timerfd_create,  sys_timerfd_create),                   // 319

   LINXY(__NR_timerfd_settime,  sys_timerfd_settime),                 // 320
   LINXY(__NR_timerfd_gettime,  sys_timerfd_gettime),                 // 321
   LINXY(__NR_signalfd4,  sys_signalfd4),                             // 322
   LINXY(__NR_eventfd2,  sys_eventfd2),                               // 323
   LINXY(__NR_inotify_init1,  sys_inotify_init1),                     // 324

   LINXY(__NR_pipe2,  sys_pipe2),                                     // 325
   LINXY(__NR_dup3,  sys_dup3),                                       // 326
   LINXY(__NR_epoll_create1,  sys_epoll_create1),                     // 327
   LINXY(__NR_preadv, sys_preadv),                                    // 328
   LINX_(__NR_pwritev, sys_pwritev),                                  // 329

   LINXY(__NR_rt_tgsigqueueinfo, sys_rt_tgsigqueueinfo),              // 330
   LINXY(__NR_perf_event_open, sys_perf_event_open),                  // 331
   LINXY(__NR_fanotify_init, sys_fanotify_init),                      // 332
   LINX_(__NR_fanotify_mark, sys_fanotify_mark),                      // 333
   LINXY(__NR_prlimit64, sys_prlimit64),                              // 334

   LINXY(__NR_name_to_handle_at, sys_name_to_handle_at),              // 335
   LINXY(__NR_open_by_handle_at, sys_open_by_handle_at),              // 336
   LINXY(__NR_clock_adjtime, sys_clock_adjtime),                      // 337
   LINX_(__NR_syncfs, sys_syncfs),                                    // 338
// ?????(__NR_setns, ),                                               // 339

   LINXY(__NR_process_vm_readv, sys_process_vm_readv),                // 340
   LINX_(__NR_process_vm_writev, sys_process_vm_writev),              // 341
// ?????(__NR_s390_runtime_instr, ),                                  // 342
   LINX_(__NR_kcmp, sys_kcmp),                                        // 343
// ?????(__NR_finit_module, ),                                        // 344

// ?????(__NR_sched_setattr, ),                                       // 345
// ?????(__NR_sched_getattr, ),                                       // 346
   LINX_(__NR_renameat2, sys_renameat2),                              // 347
// ?????(__NR_seccomp, ),                                             // 348
   LINXY(__NR_getrandom, sys_getrandom),                              // 349

   LINXY(__NR_memfd_create, sys_memfd_create),                        // 350

   LINX_(__NR_membarrier, sys_membarrier),                            // 356
   LINXY(__NR_recvmmsg, sys_recvmmsg),                                // 357
   LINXY(__NR_sendmmsg, sys_sendmmsg),                                // 358
   LINXY(__NR_socket, sys_socket),                                    // 359
   LINXY(__NR_socketpair, sys_socketpair),                            // 360
   LINX_(__NR_bind, sys_bind),                                        // 361
   LINX_(__NR_connect, sys_connect),                                  // 362
   LINX_(__NR_listen, sys_listen),                                    // 363
   LINXY(__NR_accept4, sys_accept4),                                  // 364
   LINXY(__NR_getsockopt, sys_getsockopt),                            // 365
   LINX_(__NR_setsockopt, sys_setsockopt),                            // 366
   LINXY(__NR_getsockname, sys_getsockname),                          // 367
   LINXY(__NR_getpeername, sys_getpeername),                          // 368
   LINX_(__NR_sendto, sys_sendto),                                    // 369
   LINX_(__NR_sendmsg, sys_sendmsg),                                  // 270
   LINXY(__NR_recvfrom, sys_recvfrom),                                // 371
   LINXY(__NR_recvmsg, sys_recvmsg),                                  // 372
   LINX_(__NR_shutdown, sys_shutdown),                                // 373

   LINXY(__NR_statx, sys_statx),                                      // 379
};

SyscallTableEntry* ML_(get_linux_syscall_entry) ( UInt sysno )
{
   const UInt syscall_table_size
      = sizeof(syscall_table) / sizeof(syscall_table[0]);

   /* Is it in the contiguous initial section of the table? */
   if (sysno < syscall_table_size) {
      SyscallTableEntry* sys = &syscall_table[sysno];
      if (sys->before == NULL)
         return NULL; /* no entry */
      else
         return sys;
   }

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

#endif

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/*--- end                                                          ---*/
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