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 * This is the HPPA Linux incarnation of arch-dependent OS-dependent
 * routines. See also "linux-os.c".

 * This software is part of the SBCL system. See the README file for
 * more information.
 * This software is derived from the CMU CL system, which was
 * written at Carnegie Mellon University and released into the
 * public domain. The software is in the public domain and is
 * provided with absolutely no warranty. See the COPYING and CREDITS
 * files for more information.

#include <stdio.h>
#include <sys/param.h>
#include <sys/file.h>
#include "sbcl.h"
#include "./signal.h"
#include "os.h"
#include "arch.h"
#include "globals.h"
#include "interrupt.h"
#include "interr.h"
#include "lispregs.h"
#include <sys/socket.h>
#include <sys/utsname.h>

#include <sys/types.h>
#include <signal.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <unistd.h>

#include "validate.h"
size_t os_vm_page_size;

#error "Define threading support functions"
int arch_os_thread_init(struct thread *thread) {
    return 1;                  /* success */
int arch_os_thread_cleanup(struct thread *thread) {
    return 1;                  /* success */

os_context_register_t   *
os_context_register_addr(os_context_t *context, int offset)
    if (offset == 0) {
      /* KLUDGE: I'm not sure, but it's possible that Linux puts the
           contents of the Processor Status Word in the (wired-zero)
           slot in the mcontext. In any case, the following is
           unlikely to do any harm: */
      static int zero;
      zero = 0;
      return &zero;
    } else {
      return &(((struct sigcontext *) &(context->uc_mcontext))->sc_gr[offset]);

os_context_register_t *
os_context_pc_addr(os_context_t *context)
    /* Why do I get all the silly ports? -- CSR, 2002-08-11 */
    return &(((struct sigcontext *) &(context->uc_mcontext))->sc_iaoq[0]);

os_context_register_t *
os_context_npc_addr(os_context_t *context)
    return &(((struct sigcontext *) &(context->uc_mcontext))->sc_iaoq[1]);

sigset_t *
os_context_sigmask_addr(os_context_t *context)
    return &(context->uc_sigmask);

os_restore_fp_control(os_context_t *context)
    /* FIXME: Probably do something. */

os_flush_icache(os_vm_address_t address, os_vm_size_t length)
    /* FIXME: Maybe this is OK. */

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