280 lines
6.8 KiB
C
280 lines
6.8 KiB
C
/* Functions specific to running gdb native on an i386 running NetBSD
|
||
Copyright 1989, 1992, 1993, 1994, 1996 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 <sys/types.h>
|
||
#include <sys/ptrace.h>
|
||
#include <machine/reg.h>
|
||
#include <machine/frame.h>
|
||
#include <machine/pcb.h>
|
||
|
||
#include "defs.h"
|
||
#include "inferior.h"
|
||
#include "target.h"
|
||
#include "gdbcore.h"
|
||
|
||
void
|
||
fetch_inferior_registers (regno)
|
||
int regno;
|
||
{
|
||
struct reg inferior_registers;
|
||
|
||
ptrace (PT_GETREGS, inferior_pid,
|
||
(PTRACE_ARG3_TYPE) &inferior_registers, 0);
|
||
memcpy (®isters[REGISTER_BYTE (0)], &inferior_registers,
|
||
sizeof(inferior_registers));
|
||
|
||
/* FIXME: FP regs? */
|
||
registers_fetched ();
|
||
}
|
||
|
||
void
|
||
store_inferior_registers (regno)
|
||
int regno;
|
||
{
|
||
struct reg inferior_registers;
|
||
|
||
memcpy (&inferior_registers, ®isters[REGISTER_BYTE (0)],
|
||
sizeof(inferior_registers));
|
||
ptrace (PT_SETREGS, inferior_pid,
|
||
(PTRACE_ARG3_TYPE) &inferior_registers, 0);
|
||
|
||
/* FIXME: FP regs? */
|
||
}
|
||
|
||
|
||
/* XXX - Add this to machine/regs.h instead? */
|
||
struct md_core {
|
||
struct reg intreg;
|
||
struct fpreg freg;
|
||
};
|
||
|
||
static struct fpreg i386_fp_registers;
|
||
static int i386_fp_read = 0;
|
||
|
||
static void
|
||
fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
|
||
char *core_reg_sect;
|
||
unsigned core_reg_size;
|
||
int which;
|
||
unsigned int reg_addr; /* Unused in this version */
|
||
{
|
||
struct md_core *core_reg;
|
||
|
||
core_reg = (struct md_core *)core_reg_sect;
|
||
|
||
/* We get everything from the .reg section. */
|
||
if (which != 0)
|
||
return;
|
||
|
||
if (core_reg_size < sizeof(struct reg)) {
|
||
fprintf_unfiltered (gdb_stderr, "Couldn't read regs from core file\n");
|
||
return;
|
||
}
|
||
|
||
/* Integer registers */
|
||
memcpy(®isters[REGISTER_BYTE (0)],
|
||
&core_reg->intreg, sizeof(struct reg));
|
||
|
||
/* Floating point registers */
|
||
i386_fp_registers = core_reg->freg;
|
||
i386_fp_read = 1;
|
||
|
||
registers_fetched ();
|
||
}
|
||
|
||
/* Register that we are able to handle i386nbsd core file formats.
|
||
FIXME: is this really bfd_target_unknown_flavour? */
|
||
|
||
static struct core_fns nat_core_fns =
|
||
{
|
||
bfd_target_unknown_flavour,
|
||
fetch_core_registers,
|
||
NULL
|
||
};
|
||
|
||
void
|
||
_initialize_i386nbsd_nat ()
|
||
{
|
||
add_core_fns (&nat_core_fns);
|
||
}
|
||
|
||
|
||
/*
|
||
* kernel_u_size() is not helpful on NetBSD because
|
||
* the "u" struct is NOT in the core dump file.
|
||
*/
|
||
|
||
#ifdef FETCH_KCORE_REGISTERS
|
||
/*
|
||
* Get registers from a kernel crash dump or live kernel.
|
||
* Called by kcore-nbsd.c:get_kcore_registers().
|
||
*/
|
||
void
|
||
fetch_kcore_registers (pcb)
|
||
struct pcb *pcb;
|
||
{
|
||
int i, regno, regs[4];
|
||
|
||
/*
|
||
* get the register values out of the sys pcb and
|
||
* store them where `read_register' will find them.
|
||
*/
|
||
if (target_read_memory(pcb->pcb_tss.tss_esp+4,
|
||
(char *)regs, sizeof(regs)))
|
||
error("Cannot read ebx, esi, and edi.");
|
||
for (i = 0, regno = 0; regno < 3; regno++)
|
||
supply_register(regno, (char *)&i);
|
||
supply_register(3, (char *)®s[2]);
|
||
supply_register(4, (char *)&pcb->pcb_tss.tss_esp);
|
||
supply_register(5, (char *)&pcb->pcb_tss.tss_ebp);
|
||
supply_register(6, (char *)®s[1]);
|
||
supply_register(7, (char *)®s[0]);
|
||
supply_register(8, (char *)®s[3]);
|
||
for (i = 0, regno = 9; regno < 10; regno++)
|
||
supply_register(regno, (char *)&i);
|
||
#if 0
|
||
i = 0x08;
|
||
supply_register(10, (char *)&i);
|
||
i = 0x10;
|
||
supply_register(11, (char *)&i);
|
||
#endif
|
||
|
||
/* The kernel does not use the FPU, so ignore it. */
|
||
registers_fetched ();
|
||
}
|
||
#endif /* FETCH_KCORE_REGISTERS */
|
||
|
||
#ifdef FLOAT_INFO
|
||
#include "language.h" /* for local_hex_string */
|
||
#include "floatformat.h"
|
||
|
||
#include <sys/param.h>
|
||
#include <sys/dir.h>
|
||
#include <signal.h>
|
||
#include <sys/ioctl.h>
|
||
#include <fcntl.h>
|
||
|
||
#include <a.out.h>
|
||
|
||
#include <sys/time.h>
|
||
#include <sys/resource.h>
|
||
#include <sys/uio.h>
|
||
#define curpcb Xcurpcb /* XXX avoid leaking declaration from pcb.h */
|
||
#include <sys/user.h>
|
||
#undef curpcb
|
||
#include <sys/file.h>
|
||
#include "gdb_stat.h"
|
||
#include <sys/ptrace.h>
|
||
|
||
extern void print_387_control_word (); /* i387-tdep.h */
|
||
extern void print_387_status_word ();
|
||
|
||
struct env387
|
||
{
|
||
unsigned short control;
|
||
unsigned short r0;
|
||
unsigned short status;
|
||
unsigned short r1;
|
||
unsigned short tag;
|
||
unsigned short r2;
|
||
unsigned long eip;
|
||
unsigned short code_seg;
|
||
unsigned short opcode;
|
||
unsigned long operand;
|
||
unsigned short operand_seg;
|
||
unsigned short r3;
|
||
unsigned char regs[8][10];
|
||
};
|
||
|
||
static void
|
||
print_387_status (status, ep)
|
||
unsigned short status;
|
||
struct env387 *ep;
|
||
{
|
||
int i;
|
||
int bothstatus;
|
||
int top;
|
||
int fpreg;
|
||
|
||
bothstatus = ((status != 0) && (ep->status != 0));
|
||
if (status != 0)
|
||
{
|
||
if (bothstatus)
|
||
printf_unfiltered ("u: ");
|
||
print_387_status_word ((unsigned int)status);
|
||
}
|
||
|
||
if (ep->status != 0)
|
||
{
|
||
if (bothstatus)
|
||
printf_unfiltered ("e: ");
|
||
print_387_status_word ((unsigned int)ep->status);
|
||
}
|
||
|
||
print_387_control_word ((unsigned int)ep->control);
|
||
printf_unfiltered ("last exception: ");
|
||
printf_unfiltered ("opcode %s; ", local_hex_string(ep->opcode));
|
||
printf_unfiltered ("pc %s:", local_hex_string(ep->code_seg));
|
||
printf_unfiltered ("%s; ", local_hex_string(ep->eip));
|
||
printf_unfiltered ("operand %s", local_hex_string(ep->operand_seg));
|
||
printf_unfiltered (":%s\n", local_hex_string(ep->operand));
|
||
|
||
top = (ep->status >> 11) & 7;
|
||
|
||
printf_unfiltered ("regno tag msb lsb value\n");
|
||
for (fpreg = 7; fpreg >= 0; fpreg--)
|
||
{
|
||
double val;
|
||
|
||
printf_unfiltered ("%s %d: ", fpreg == top ? "=>" : " ", fpreg);
|
||
|
||
switch ((ep->tag >> (fpreg * 2)) & 3)
|
||
{
|
||
case 0: printf_unfiltered ("valid "); break;
|
||
case 1: printf_unfiltered ("zero "); break;
|
||
case 2: printf_unfiltered ("trap "); break;
|
||
case 3: printf_unfiltered ("empty "); break;
|
||
}
|
||
for (i = 9; i >= 0; i--)
|
||
printf_unfiltered ("%02x", ep->regs[fpreg][i]);
|
||
|
||
floatformat_to_double(&floatformat_i387_ext, (char *) ep->regs[fpreg],
|
||
&val);
|
||
printf_unfiltered (" %g\n", val);
|
||
}
|
||
}
|
||
|
||
i386_float_info ()
|
||
{
|
||
extern int inferior_pid;
|
||
|
||
if (inferior_pid)
|
||
{
|
||
ptrace (PT_GETFPREGS, inferior_pid, (PTRACE_ARG3_TYPE) &i386_fp_registers,
|
||
0);
|
||
}
|
||
else if (!i386_fp_read)
|
||
{
|
||
error ("The program has no floating point registers now.");
|
||
}
|
||
|
||
print_387_status (0, (struct env387 *) &i386_fp_registers);
|
||
}
|
||
#endif
|