GDB (xrefs)
Loading...
Searching...
No Matches
i386-netbsd-nat.c
Go to the documentation of this file.
1/* Native-dependent code for NetBSD/i386.
2
3 Copyright (C) 2004-2023 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 3 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, see <http://www.gnu.org/licenses/>. */
19
20#include "defs.h"
21#include "gdbcore.h"
22#include "regcache.h"
23#include "target.h"
24
25#include "i386-tdep.h"
26#include "i386-bsd-nat.h"
27
28/* Support for debugging kernel virtual memory images. */
29
30#include <sys/types.h>
31#include <machine/frame.h>
32#include <machine/pcb.h>
33
34#include "netbsd-nat.h"
35#include "bsd-kvm.h"
36
37static int
38i386nbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
39{
40 struct switchframe sf;
41
42 /* The following is true for NetBSD 1.6.2:
43
44 The pcb contains %esp and %ebp at the point of the context switch
45 in cpu_switch(). At that point we have a stack frame as
46 described by `struct switchframe', which for NetBSD 1.6.2 has the
47 following layout:
48
49 interrupt level
50 %edi
51 %esi
52 %ebx
53 %eip
54
55 we reconstruct the register state as it would look when we just
56 returned from cpu_switch(). */
57
58 /* The stack pointer shouldn't be zero. */
59 if (pcb->pcb_esp == 0)
60 return 0;
61
62 read_memory (pcb->pcb_esp, (gdb_byte *)&sf, sizeof sf);
63 pcb->pcb_esp += sizeof (struct switchframe);
64 regcache->raw_supply (I386_EDI_REGNUM, &sf.sf_edi);
65 regcache->raw_supply (I386_ESI_REGNUM, &sf.sf_esi);
66 regcache->raw_supply (I386_EBP_REGNUM, &pcb->pcb_ebp);
67 regcache->raw_supply (I386_ESP_REGNUM, &pcb->pcb_esp);
68 regcache->raw_supply (I386_EBX_REGNUM, &sf.sf_ebx);
69 regcache->raw_supply (I386_EIP_REGNUM, &sf.sf_eip);
70
71 return 1;
72}
73
75
77void
79{
81
82 /* Support debugging kernel virtual memory images. */
84}
void bsd_kvm_add_target(int(*supply_pcb)(struct regcache *, struct pcb *))
Definition bsd-kvm.c:380
void raw_supply(int regnum, const void *buf) override
Definition regcache.c:1062
void read_memory(CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
Definition corefile.c:238
static i386_bsd_nat_target< nbsd_nat_target > the_i386_nbsd_nat_target
static int i386nbsd_supply_pcb(struct regcache *regcache, struct pcb *pcb)
void _initialize_i386nbsd_nat()
@ I386_ESI_REGNUM
Definition i386-tdep.h:287
@ I386_EIP_REGNUM
Definition i386-tdep.h:289
@ I386_EBP_REGNUM
Definition i386-tdep.h:286
@ I386_ESP_REGNUM
Definition i386-tdep.h:285
@ I386_EBX_REGNUM
Definition i386-tdep.h:284
@ I386_EDI_REGNUM
Definition i386-tdep.h:288
void add_inf_child_target(inf_child_target *target)
Definition inf-child.c:418