mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-27 20:14:06 +08:00
84 lines
2.4 KiB
C
84 lines
2.4 KiB
C
/* Native-dependent code for NetBSD/i386.
|
|
|
|
Copyright (C) 2004-2020 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 3 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, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#include "defs.h"
|
|
#include "gdbcore.h"
|
|
#include "regcache.h"
|
|
#include "target.h"
|
|
|
|
#include "i386-tdep.h"
|
|
#include "i386-bsd-nat.h"
|
|
|
|
/* Support for debugging kernel virtual memory images. */
|
|
|
|
#include <sys/types.h>
|
|
#include <machine/frame.h>
|
|
#include <machine/pcb.h>
|
|
|
|
#include "nbsd-nat.h"
|
|
#include "bsd-kvm.h"
|
|
|
|
static int
|
|
i386nbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
|
|
{
|
|
struct switchframe sf;
|
|
|
|
/* The following is true for NetBSD 1.6.2:
|
|
|
|
The pcb contains %esp and %ebp at the point of the context switch
|
|
in cpu_switch(). At that point we have a stack frame as
|
|
described by `struct switchframe', which for NetBSD 1.6.2 has the
|
|
following layout:
|
|
|
|
interrupt level
|
|
%edi
|
|
%esi
|
|
%ebx
|
|
%eip
|
|
|
|
we reconstruct the register state as it would look when we just
|
|
returned from cpu_switch(). */
|
|
|
|
/* The stack pointer shouldn't be zero. */
|
|
if (pcb->pcb_esp == 0)
|
|
return 0;
|
|
|
|
read_memory (pcb->pcb_esp, (gdb_byte *)&sf, sizeof sf);
|
|
pcb->pcb_esp += sizeof (struct switchframe);
|
|
regcache->raw_supply (I386_EDI_REGNUM, &sf.sf_edi);
|
|
regcache->raw_supply (I386_ESI_REGNUM, &sf.sf_esi);
|
|
regcache->raw_supply (I386_EBP_REGNUM, &pcb->pcb_ebp);
|
|
regcache->raw_supply (I386_ESP_REGNUM, &pcb->pcb_esp);
|
|
regcache->raw_supply (I386_EBX_REGNUM, &sf.sf_ebx);
|
|
regcache->raw_supply (I386_EIP_REGNUM, &sf.sf_eip);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static i386_bsd_nat_target<nbsd_nat_target> the_i386_nbsd_nat_target;
|
|
|
|
void
|
|
_initialize_i386nbsd_nat (void)
|
|
{
|
|
add_inf_child_target (&the_i386_nbsd_nat_target);
|
|
|
|
/* Support debugging kernel virtual memory images. */
|
|
bsd_kvm_add_target (i386nbsd_supply_pcb);
|
|
}
|