gdb6/files/kvm-fbsd-i386.h

/* Kernel core dump functions below target vector, for GDB on FreeBSD/i386.
   Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995
   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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/

__FBSDID("$FreeBSD: ports/devel/gdb6/files/kvm-fbsd-i386.h,v 1.2 2004/08/23 06:34:48 obrien Exp $");

#include <machine/frame.h>
#include "i386-tdep.h"

static CORE_ADDR
ksym_maxuseraddr (void)
{
  static CORE_ADDR maxuseraddr;
  struct minimal_symbol *sym;

  if (maxuseraddr == 0)
    {
      sym = lookup_minimal_symbol ("PTmap", NULL, NULL);
      if (sym == NULL) {
        maxuseraddr = VM_MAXUSER_ADDRESS;
      } else {
        maxuseraddr = SYMBOL_VALUE_ADDRESS (sym);
      }
    }
  return maxuseraddr;
}


/* Symbol names of kernel entry points.  Use special frames.  */
#define KSYM_TRAP       "calltrap"
#define KSYM_INTR       "Xintr"
#define KSYM_FASTINTR   "Xfastintr"
#define KSYM_OLDSYSCALL "Xlcall_syscall"
#define KSYM_SYSCALL    "Xint0x80_syscall"

/* The following is FreeBSD-specific hackery to decode special frames
   and elide the assembly-language stub.  This could be made faster by
   defining a frame_type field in the machine-dependent frame information,
   but we don't think that's too important right now.  */
enum frametype { tf_normal, tf_trap, tf_interrupt, tf_syscall };

#if __FreeBSD_version >= 500032
CORE_ADDR
fbsd_kern_frame_saved_pc (struct frame_info *fi)
{
  struct minimal_symbol *sym;
  CORE_ADDR this_saved_pc;
  enum frametype frametype;

  this_saved_pc = read_memory_integer (get_frame_base (fi) + 4, 4);
  sym = lookup_minimal_symbol_by_pc (this_saved_pc);
  frametype = tf_normal;
  if (sym != NULL)
    {
      if (strcmp (DEPRECATED_SYMBOL_NAME (sym), KSYM_TRAP) == 0)
        frametype = tf_trap;
      else
        if (strncmp (DEPRECATED_SYMBOL_NAME (sym), KSYM_INTR,
            strlen (KSYM_INTR)) == 0 || strncmp (DEPRECATED_SYMBOL_NAME(sym),
            KSYM_FASTINTR, strlen (KSYM_FASTINTR)) == 0)
          frametype = tf_interrupt;
      else
        if (strcmp (DEPRECATED_SYMBOL_NAME (sym), KSYM_SYSCALL) == 0 ||
            strcmp (DEPRECATED_SYMBOL_NAME (sym), KSYM_OLDSYSCALL) == 0)
          frametype = tf_syscall;
    }

  switch (frametype)
    {
      default:
      case tf_normal:
        return (this_saved_pc);
#define oEIP   offsetof (struct trapframe, tf_eip)

      case tf_trap:
        return (read_memory_integer (get_frame_base (fi) + 8 + oEIP, 4));

      case tf_interrupt:
        return (read_memory_integer (get_frame_base (fi) + 12 + oEIP, 4));

      case tf_syscall:
        return (read_memory_integer (get_frame_base (fi) + 8 + oEIP, 4));
#undef oEIP
    }
}
#endif

static void
fetch_kcore_registers (struct pcb *pcb)
{
  int i;
  int noreg;

  /* Get the register values out of the sys pcb and store them where
     `read_register' will find them.  */
  /*
   * XXX many registers aren't available.
   * XXX for the non-core case, the registers are stale - they are for
   *     the last context switch to the debugger.
   * XXX gcc's register numbers aren't all #defined in tm-i386.h.
   */
  noreg = 0;
  for (i = 0; i < 3; ++i)               /* eax,ecx,edx */
    regcache_raw_supply (current_regcache, i, (char *)&noreg);

  /* DEO:XXX use SP_REGNUM and PC_REGNUM -- this is GDB_MULTI_ARCH */
  regcache_raw_supply (current_regcache, 3, (char *) &pcb->pcb_ebx);
  regcache_raw_supply (current_regcache, SP_REGNUM, (char *) &pcb->pcb_esp);
  regcache_raw_supply (current_regcache, I386_EBP_REGNUM, (char *) &pcb->pcb_ebp);
  regcache_raw_supply (current_regcache, 6, (char *) &pcb->pcb_esi);
  regcache_raw_supply (current_regcache, 7, (char *) &pcb->pcb_edi);
  regcache_raw_supply (current_regcache, PC_REGNUM, (char *) &pcb->pcb_eip);

  for (i = 9; i < 14; ++i)              /* eflags, cs, ss, ds, es, fs */
    regcache_raw_supply (current_regcache, i, (char *) &noreg);
  regcache_raw_supply (current_regcache, 15, (char *) &pcb->pcb_gs);

  /* XXX 80387 registers?  */
}
Revision:	2
Committed:	2007-01-31T14:59:36-08:00 (18 years, 5 months ago) by douglas
Content type:	text/x-c
Original Path:	*freebsd/gdb6/files/kvm-fbsd-i386.h*
File size:	4527 byte(s)
Log Message:	This needs fixing...
#	User	Rev	Content
1	douglas	2	/* Kernel core dump functions below target vector, for GDB on FreeBSD/i386.
2			Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995
3			Free Software Foundation, Inc.
4
5			This file is part of GDB.
6
7			This program is free software; you can redistribute it and/or modify
8			it under the terms of the GNU General Public License as published by
9			the Free Software Foundation; either version 2 of the License, or
10			(at your option) any later version.
11
12			This program is distributed in the hope that it will be useful,
13			but WITHOUT ANY WARRANTY; without even the implied warranty of
14			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			GNU General Public License for more details.
16
17			You should have received a copy of the GNU General Public License
18			along with this program; if not, write to the Free Software
19			Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20			*/
21
22			__FBSDID("$FreeBSD: ports/devel/gdb6/files/kvm-fbsd-i386.h,v 1.2 2004/08/23 06:34:48 obrien Exp $");
23
24			#include <machine/frame.h>
25			#include "i386-tdep.h"
26
27			static CORE_ADDR
28			ksym_maxuseraddr (void)
29			{
30			static CORE_ADDR maxuseraddr;
31			struct minimal_symbol *sym;
32
33			if (maxuseraddr == 0)
34			{
35			sym = lookup_minimal_symbol ("PTmap", NULL, NULL);
36			if (sym == NULL) {
37			maxuseraddr = VM_MAXUSER_ADDRESS;
38			} else {
39			maxuseraddr = SYMBOL_VALUE_ADDRESS (sym);
40			}
41			}
42			return maxuseraddr;
43			}
44
45
46			/* Symbol names of kernel entry points. Use special frames. */
47			#define KSYM_TRAP "calltrap"
48			#define KSYM_INTR "Xintr"
49			#define KSYM_FASTINTR "Xfastintr"
50			#define KSYM_OLDSYSCALL "Xlcall_syscall"
51			#define KSYM_SYSCALL "Xint0x80_syscall"
52
53			/* The following is FreeBSD-specific hackery to decode special frames
54			and elide the assembly-language stub. This could be made faster by
55			defining a frame_type field in the machine-dependent frame information,
56			but we don't think that's too important right now. */
57			enum frametype { tf_normal, tf_trap, tf_interrupt, tf_syscall };
58
59			#if __FreeBSD_version >= 500032
60			CORE_ADDR
61			fbsd_kern_frame_saved_pc (struct frame_info *fi)
62			{
63			struct minimal_symbol *sym;
64			CORE_ADDR this_saved_pc;
65			enum frametype frametype;
66
67			this_saved_pc = read_memory_integer (get_frame_base (fi) + 4, 4);
68			sym = lookup_minimal_symbol_by_pc (this_saved_pc);
69			frametype = tf_normal;
70			if (sym != NULL)
71			{
72			if (strcmp (DEPRECATED_SYMBOL_NAME (sym), KSYM_TRAP) == 0)
73			frametype = tf_trap;
74			else
75			if (strncmp (DEPRECATED_SYMBOL_NAME (sym), KSYM_INTR,
76			strlen (KSYM_INTR)) == 0 \|\| strncmp (DEPRECATED_SYMBOL_NAME(sym),
77			KSYM_FASTINTR, strlen (KSYM_FASTINTR)) == 0)
78			frametype = tf_interrupt;
79			else
80			if (strcmp (DEPRECATED_SYMBOL_NAME (sym), KSYM_SYSCALL) == 0 \|\|
81			strcmp (DEPRECATED_SYMBOL_NAME (sym), KSYM_OLDSYSCALL) == 0)
82			frametype = tf_syscall;
83			}
84
85			switch (frametype)
86			{
87			default:
88			case tf_normal:
89			return (this_saved_pc);
90			#define oEIP offsetof (struct trapframe, tf_eip)
91
92			case tf_trap:
93			return (read_memory_integer (get_frame_base (fi) + 8 + oEIP, 4));
94
95			case tf_interrupt:
96			return (read_memory_integer (get_frame_base (fi) + 12 + oEIP, 4));
97
98			case tf_syscall:
99			return (read_memory_integer (get_frame_base (fi) + 8 + oEIP, 4));
100			#undef oEIP
101			}
102			}
103			#endif
104
105			static void
106			fetch_kcore_registers (struct pcb *pcb)
107			{
108			int i;
109			int noreg;
110
111			/* Get the register values out of the sys pcb and store them where
112			`read_register' will find them. */
113			/*
114			* XXX many registers aren't available.
115			* XXX for the non-core case, the registers are stale - they are for
116			* the last context switch to the debugger.
117			* XXX gcc's register numbers aren't all #defined in tm-i386.h.
118			*/
119			noreg = 0;
120			for (i = 0; i < 3; ++i) /* eax,ecx,edx */
121			regcache_raw_supply (current_regcache, i, (char *)&noreg);
122
123			/* DEO:XXX use SP_REGNUM and PC_REGNUM -- this is GDB_MULTI_ARCH */
124			regcache_raw_supply (current_regcache, 3, (char *) &pcb->pcb_ebx);
125			regcache_raw_supply (current_regcache, SP_REGNUM, (char *) &pcb->pcb_esp);
126			regcache_raw_supply (current_regcache, I386_EBP_REGNUM, (char *) &pcb->pcb_ebp);
127			regcache_raw_supply (current_regcache, 6, (char *) &pcb->pcb_esi);
128			regcache_raw_supply (current_regcache, 7, (char *) &pcb->pcb_edi);
129			regcache_raw_supply (current_regcache, PC_REGNUM, (char *) &pcb->pcb_eip);
130
131			for (i = 9; i < 14; ++i) /* eflags, cs, ss, ds, es, fs */
132			regcache_raw_supply (current_regcache, i, (char *) &noreg);
133			regcache_raw_supply (current_regcache, 15, (char *) &pcb->pcb_gs);
134
135			/* XXX 80387 registers? */
136			}