sys/src/sysexit.c

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// _Id: sysexit.c,v 1.6 2006-05-16 14:48:01 roart Exp $
// _Locker:  $

// Author. Roar Thronæs.

#include<linux/linkage.h>
#include<misc.h>
#include<ssdef.h>
#include<system_data_cells.h>
#include<linux/kernel.h>
#include<asm/segment.h>
 
asmlinkage int exe_exit(unsigned int code) {
#ifdef __x86_64__
  long dummy;
  __asm__ __volatile__ ("movq %%rsp,%0; ":"=r" (dummy) );
#endif
  struct _exh * exh = ctl_gl_thexec;
  if (exh) {
    ctl_gl_thexec = exh->exh$l_flink;
#ifdef __i386__
    char ** addr = ((long)&code) + 0x28;
    (*addr)=exh->exh_l_handler;
#if 1
    // check. related to CLI supervisor
    addr[-3] = __SUPERVISOR_DS; // temp fix
    addr[-2] = __SUPERVISOR_DS; // temp fix
    addr[1] = __SUPERVISOR_CS; // temp fix
#endif
    if (exh->exh_l_first_arg) {
      addr = ((long)addr) + 0xc;
      *addr = exh->exh_l_first_arg + 4;
#if 1
      // check. related to CLI supervisor
      addr[1] = __SUPERVISOR_DS; // temp fix
#endif
    }
#else
    char ** addr = ((long)dummy+0x60);
    (*addr)=exh->exh_l_handler;
    if (exh->exh_l_first_arg) {
      addr = ((long)addr) + 0x18;
      *addr = exh->exh_l_first_arg + 0x8; //0x28;
    }
#endif
    return SS__NORMAL;
  } else {
#if 0
    return sys_exit(code);
#endif
    do_exit((code&0xff)<<8);
  }
}

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