xm-pyr.h

早期freebsd实现

/* Definitions to make GDB run on a Pyramidax under OSx 4.0 (4.2bsd).
   Copyright 1988, 1989, 1992  Free Software Foundation, Inc.

This file is part of GDB.

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., 675 Mass Ave, Cambridge, MA 02139, USA.  */

#define HOST_BYTE_ORDER BIG_ENDIAN

/* Define PYRAMID_CONTROL_FRAME_DEBUGGING to get copious messages
   about reading the control stack on standard output. This
   makes gdb unusable as a debugger. */

/* #define PYRAMID_CONTROL_FRAME_DEBUGGING */

/* Define PYRAMID_FRAME_DEBUGGING for ? */

/* use Pyramid's slightly strange ptrace */
#define PYRAMID_PTRACE

/* Traditional Unix virtual address spaces have thre regions: text,
   data and stack.  The text, initialised data, and uninitialised data
   are represented in separate segments of the a.out file.
   When a process dumps core, the data and stack regions are written
   to a core file.  This gives a debugger enough information to
   reconstruct (and debug) the virtual address space at the time of
   the coredump.
   Pyramids have an distinct fourth region of the virtual address
   space, in which the contents of the windowed registers are stacked
   in fixed-size frames.  Pyramid refer to this region as the control
   stack.  Each call (or trap) automatically allocates a new register
   frame; each return deallocates the current frame and restores the
   windowed registers to their values before the call.

   When dumping core, the control stack is written to a core files as
   a third segment. The core-handling functions need to know to deal
   with it. */ 

/* Tell dep.c what the extra segment is.  */
#define PYRAMID_CORE

#define NO_SIGINTERRUPT

#define HAVE_WAIT_STRUCT

/* Get rid of any system-imposed stack limit if possible.  */

#define SET_STACK_LIMIT_HUGE

/* This is the amount to subtract from u.u_ar0
   to get the offset in the core file of the register values.  */

#define KERNEL_U_ADDR (0x80000000 - (UPAGES * NBPG))

/* Define offsets of registers in the core file (or maybe u area) */
#define REGISTER_U_ADDR(addr, blockend, regno)	\
{ struct user __u;					\
  addr = blockend  + (regno - 16 ) * 4;			\
  if (regno == 67) {   					\
      printf("\\geting reg 67\\");			\
      addr = (int)(&__u.u_pcb.pcb_csp) - (int) &__u;	\
  } else if (regno == KSP_REGNUM) {			\
      printf("\\geting KSP (reg %d)\\", KSP_REGNUM);	\
      addr = (int)(&__u.u_pcb.pcb_ksp) - (int) &__u;	\
  } else if (regno == CSP_REGNUM) {			\
      printf("\\geting CSP (reg %d\\",CSP_REGNUM);	\
      addr = (int)(&__u.u_pcb.pcb_csp) - (int) &__u;	\
  } else if (regno == 64) {				\
      printf("\\geting reg 64\\");			\
      addr = (int)(&__u.u_pcb.pcb_csp) - (int) &__u;	\
   } else if (regno == PS_REGNUM)			\
      addr = blockend - 4;				\
  else if (1 && ((16 > regno) && (regno > 11)))		\
      addr = last_frame_offset + (4 *(regno+32));	\
  else if (0 && (12 > regno)) 				\
      addr = global_reg_offset + (4 *regno);		\
  else if (16 > regno)	 				\
      addr = global_reg_offset + (4 *regno);		\
 else							\
      addr = blockend  + (regno - 16 ) * 4;		\
}

/* Override copies of {fetch,store}_inferior_registers in infptrace.c.  */
#define FETCH_INFERIOR_REGISTERS