mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-09 04:21:49 +08:00
bcfca65278
(_initialize_m68kbsd_nat): Fix pasto. * Makefile.in (m68kbsd-nat.o): Update dependencies.
237 lines
6.3 KiB
C
237 lines
6.3 KiB
C
/* Native-dependent code for Motorola 68000 BSD's.
|
||
|
||
Copyright 2004 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. */
|
||
|
||
#include "defs.h"
|
||
#include "gdbcore.h"
|
||
#include "inferior.h"
|
||
#include "regcache.h"
|
||
|
||
#include "gdb_assert.h"
|
||
#include <sys/types.h>
|
||
#include <sys/ptrace.h>
|
||
#include <machine/reg.h>
|
||
|
||
#include "m68k-tdep.h"
|
||
#include "inf-ptrace.h"
|
||
|
||
static int
|
||
m68kbsd_gregset_supplies_p (int regnum)
|
||
{
|
||
return (regnum >= M68K_D0_REGNUM && regnum <= M68K_PC_REGNUM);
|
||
}
|
||
|
||
static int
|
||
m68kbsd_fpregset_supplies_p (int regnum)
|
||
{
|
||
return (regnum >= M68K_FP0_REGNUM && regnum <= M68K_FPI_REGNUM);
|
||
}
|
||
|
||
/* Supply the general-purpose registers stored in GREGS to REGCACHE. */
|
||
|
||
static void
|
||
m68kbsd_supply_gregset (struct regcache *regcache, const void *gregs)
|
||
{
|
||
const char *regs = gregs;
|
||
int regnum;
|
||
|
||
for (regnum = M68K_D0_REGNUM; regnum <= M68K_PC_REGNUM; regnum++)
|
||
regcache_raw_supply (regcache, regnum, regs + regnum * 4);
|
||
}
|
||
|
||
/* Supply the floating-point registers stored in FPREGS to REGCACHE. */
|
||
|
||
static void
|
||
m68kbsd_supply_fpregset (struct regcache *regcache, const void *fpregs)
|
||
{
|
||
const char *regs = fpregs;
|
||
int regnum;
|
||
|
||
for (regnum = M68K_FP0_REGNUM; regnum <= M68K_FPI_REGNUM; regnum++)
|
||
regcache_raw_supply (regcache, regnum,
|
||
regs + m68kbsd_fpreg_offset (regnum));
|
||
}
|
||
|
||
/* Collect the general-purpose registers from REGCACHE and store them
|
||
in GREGS. */
|
||
|
||
static void
|
||
m68kbsd_collect_gregset (const struct regcache *regcache,
|
||
void *gregs, int regnum)
|
||
{
|
||
char *regs = gregs;
|
||
int i;
|
||
|
||
for (i = M68K_D0_REGNUM; i <= M68K_PC_REGNUM; i++)
|
||
{
|
||
if (regnum == -1 || regnum == i)
|
||
regcache_raw_collect (regcache, i, regs + i * 4);
|
||
}
|
||
}
|
||
|
||
/* Collect the floating-point registers from REGCACHE and store them
|
||
in FPREGS. */
|
||
|
||
static void
|
||
m68kbsd_collect_fpregset (struct regcache *regcache,
|
||
void *fpregs, int regnum)
|
||
{
|
||
char *regs = fpregs;
|
||
int i;
|
||
|
||
for (i = M68K_FP0_REGNUM; i <= M68K_FPI_REGNUM; i++)
|
||
{
|
||
if (regnum == -1 || regnum == i)
|
||
regcache_raw_collect (regcache, i, regs + m68kbsd_fpreg_offset (i));
|
||
}
|
||
}
|
||
|
||
|
||
/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
|
||
for all registers (including the floating-point registers). */
|
||
|
||
static void
|
||
m68kbsd_fetch_inferior_registers (int regnum)
|
||
{
|
||
if (regnum == -1 || m68kbsd_gregset_supplies_p (regnum))
|
||
{
|
||
struct reg regs;
|
||
|
||
if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
|
||
(PTRACE_TYPE_ARG3) ®s, 0) == -1)
|
||
perror_with_name ("Couldn't get registers");
|
||
|
||
m68kbsd_supply_gregset (current_regcache, ®s);
|
||
}
|
||
|
||
if (regnum == -1 || m68kbsd_fpregset_supplies_p (regnum))
|
||
{
|
||
struct fpreg fpregs;
|
||
|
||
if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
|
||
(PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
|
||
perror_with_name ("Couldn't get floating point status");
|
||
|
||
m68kbsd_supply_fpregset (current_regcache, &fpregs);
|
||
}
|
||
}
|
||
|
||
/* Store register REGNUM back into the inferior. If REGNUM is -1, do
|
||
this for all registers (including the floating-point registers). */
|
||
|
||
static void
|
||
m68kbsd_store_inferior_registers (int regnum)
|
||
{
|
||
if (regnum == -1 || m68kbsd_gregset_supplies_p (regnum))
|
||
{
|
||
struct reg regs;
|
||
|
||
if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
|
||
(PTRACE_TYPE_ARG3) ®s, 0) == -1)
|
||
perror_with_name ("Couldn't get registers");
|
||
|
||
m68kbsd_collect_gregset (current_regcache, ®s, regnum);
|
||
|
||
if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
|
||
(PTRACE_TYPE_ARG3) ®s, 0) == -1)
|
||
perror_with_name ("Couldn't write registers");
|
||
}
|
||
|
||
if (regnum == -1 || m68kbsd_fpregset_supplies_p (regnum))
|
||
{
|
||
struct fpreg fpregs;
|
||
|
||
if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
|
||
(PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
|
||
perror_with_name ("Couldn't get floating point status");
|
||
|
||
m68kbsd_collect_fpregset (current_regcache, &fpregs, regnum);
|
||
|
||
if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
|
||
(PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
|
||
perror_with_name ("Couldn't write floating point status");
|
||
}
|
||
}
|
||
|
||
|
||
/* Support for debugging kernel virtual memory images. */
|
||
|
||
#include <sys/types.h>
|
||
#include <machine/pcb.h>
|
||
|
||
#include "bsd-kvm.h"
|
||
|
||
/* OpenBSD doesn't have these. */
|
||
#ifndef PCB_REGS_FP
|
||
#define PCB_REGS_FP 10
|
||
#endif
|
||
#ifndef PCB_REGS_SP
|
||
#define PCB_REGS_SP 11
|
||
#endif
|
||
|
||
static int
|
||
m68kbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
|
||
{
|
||
int regnum, tmp;
|
||
int i = 0;
|
||
|
||
/* The following is true for NetBSD 1.6.2:
|
||
|
||
The pcb contains %d2...%d7, %a2...%a7 and %ps. This accounts for
|
||
all callee-saved registers. From this information 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_regs[PCB_REGS_SP] == 0)
|
||
return 0;
|
||
|
||
for (regnum = M68K_D2_REGNUM; regnum <= M68K_D7_REGNUM; regnum++)
|
||
regcache_raw_supply (regcache, regnum, &pcb->pcb_regs[i++]);
|
||
for (regnum = M68K_A2_REGNUM; regnum <= M68K_SP_REGNUM; regnum++)
|
||
regcache_raw_supply (regcache, regnum, &pcb->pcb_regs[i++]);
|
||
|
||
tmp = pcb->pcb_ps & 0xffff;
|
||
regcache_raw_supply (regcache, M68K_PS_REGNUM, &tmp);
|
||
|
||
read_memory (pcb->pcb_regs[PCB_REGS_FP] + 4, (char *) &tmp, sizeof tmp);
|
||
regcache_raw_supply (regcache, M68K_PC_REGNUM, &tmp);
|
||
|
||
return 1;
|
||
}
|
||
|
||
|
||
/* Provide a prototype to silence -Wmissing-prototypes. */
|
||
void _initialize_m68kbsd_nat (void);
|
||
|
||
void
|
||
_initialize_m68kbsd_nat (void)
|
||
{
|
||
struct target_ops *t;
|
||
|
||
t = inf_ptrace_target ();
|
||
t->to_fetch_registers = m68kbsd_fetch_inferior_registers;
|
||
t->to_store_registers = m68kbsd_store_inferior_registers;
|
||
add_target (t);
|
||
|
||
/* Support debugging kernel virtual memory images. */
|
||
bsd_kvm_add_target (m68kbsd_supply_pcb);
|
||
}
|