utcb.h

Go to the documentation of this file.

/*****************************************************************************/
/*
 * (c) 2008-2009 Adam Lackorzynski <adam@os.inf.tu-dresden.de>,
 *               Alexander Warg <warg@os.inf.tu-dresden.de>
 *     economic rights: Technische Universität Dresden (Germany)
 *
 * This file is part of TUD:OS and distributed under the terms of the
 * GNU General Public License 2.
 * Please see the COPYING-GPL-2 file for details.
 *
 * As a special exception, you may use this file as part of a free software
 * library without restriction.  Specifically, if other files instantiate
 * templates or use macros or inline functions from this file, or you compile
 * this file and link it with other files to produce an executable, this
 * file does not by itself cause the resulting executable to be covered by
 * the GNU General Public License.  This exception does not however
 * invalidate any other reasons why the executable file might be covered by
 * the GNU General Public License.
 */
/*****************************************************************************/
#ifndef __L4_SYS__INCLUDE__ARCH_X86__UTCB_H__
#define __L4_SYS__INCLUDE__ARCH_X86__UTCB_H__
 
#include <l4/sys/types.h>
 
enum L4_utcb_consts_x86
{
  L4_UTCB_EXCEPTION_REGS_SIZE    = 19,
 
  L4_UTCB_GENERIC_DATA_SIZE      = 63,
 
  L4_UTCB_GENERIC_BUFFERS_SIZE   = 58,
 
  L4_UTCB_MSG_REGS_OFFSET        = 0,
 
  L4_UTCB_BUF_REGS_OFFSET        = 64 * sizeof(l4_umword_t),
 
  L4_UTCB_THREAD_REGS_OFFSET     = 123 * sizeof(l4_umword_t),
 
  L4_UTCB_INHERIT_FPU            = 1UL << 24,
 
  L4_UTCB_OFFSET                 = 512,
};
 
typedef struct l4_exc_regs_t
{
  l4_umword_t es;      
  l4_umword_t ds;      
  l4_umword_t gs;      
  l4_umword_t fs;      
  l4_umword_t edi;     
  l4_umword_t esi;     
  l4_umword_t ebp;     
  l4_umword_t pfa;     
  l4_umword_t ebx;     
  l4_umword_t edx;     
  l4_umword_t ecx;     
  l4_umword_t eax;     
  l4_umword_t trapno;  
  l4_umword_t err;     
  l4_umword_t ip;     
  l4_umword_t dummy1;  
  l4_umword_t flags;  
  l4_umword_t sp;     
  l4_umword_t ss;     
} l4_exc_regs_t;
 
#include_next <l4/sys/utcb.h>
 
/*
 * ==================================================================
 * Implementations.
 */
 
L4_INLINE l4_utcb_t *l4_utcb_direct(void) L4_NOTHROW
{
  l4_utcb_t *utcb;
  __asm__ ("mov %%fs:0, %0" : "=r" (utcb));
  return utcb;
}
 
L4_INLINE l4_umword_t l4_utcb_exc_pc(l4_exc_regs_t const *u) L4_NOTHROW
{
  return u->ip;
}
 
L4_INLINE void l4_utcb_exc_pc_set(l4_exc_regs_t *u, l4_addr_t pc) L4_NOTHROW
{
  u->ip = pc;
}
 
L4_INLINE void l4_utcb_exc_sp_set(l4_exc_regs_t *u, l4_addr_t sp) L4_NOTHROW
{
  u->sp = sp;
}
 
L4_INLINE l4_umword_t l4_utcb_exc_typeval(l4_exc_regs_t const *u) L4_NOTHROW
{
  return u->trapno;
}
 
L4_INLINE int l4_utcb_exc_is_pf(l4_exc_regs_t const *u) L4_NOTHROW
{
  return u->trapno == 14;
}
 
L4_INLINE l4_addr_t l4_utcb_exc_pfa(l4_exc_regs_t const *u) L4_NOTHROW
{
  return (u->pfa & ~7UL) | (u->err & 2);
}
 
L4_INLINE int l4_utcb_exc_is_ex_regs_exception(l4_exc_regs_t const *u) L4_NOTHROW
{
  return l4_utcb_exc_typeval(u) == 0xff;
}
 
#endif /* ! __L4_SYS__INCLUDE__ARCH_X86__UTCB_H__ */