361 lines
8.2 KiB
C
361 lines
8.2 KiB
C
/* Intel 386 native support.
|
||
Copyright (C) 1988, 1989, 1991, 1992 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 "frame.h"
|
||
#include "inferior.h"
|
||
#include "language.h"
|
||
#include "gdbcore.h"
|
||
|
||
#ifdef USG
|
||
#include <sys/types.h>
|
||
#endif
|
||
|
||
#include <sys/param.h>
|
||
#include <sys/dir.h>
|
||
#include <signal.h>
|
||
#include <sys/user.h>
|
||
#include <sys/ioctl.h>
|
||
#include <fcntl.h>
|
||
|
||
#include <sys/file.h>
|
||
#include "gdb_stat.h"
|
||
|
||
#include <stddef.h>
|
||
#include <sys/ptrace.h>
|
||
|
||
/* Does AIX define this in <errno.h>? */
|
||
extern int errno;
|
||
|
||
#ifndef NO_SYS_REG_H
|
||
#include <sys/reg.h>
|
||
#endif
|
||
|
||
#include "floatformat.h"
|
||
|
||
#include "target.h"
|
||
|
||
|
||
/* this table must line up with REGISTER_NAMES in tm-i386v.h */
|
||
/* symbols like 'EAX' come from <sys/reg.h> */
|
||
static int regmap[] =
|
||
{
|
||
EAX, ECX, EDX, EBX,
|
||
USP, EBP, ESI, EDI,
|
||
EIP, EFL, CS, SS,
|
||
DS, ES, FS, GS,
|
||
};
|
||
|
||
/* blockend is the value of u.u_ar0, and points to the
|
||
* place where GS is stored
|
||
*/
|
||
|
||
int
|
||
i386_register_u_addr (blockend, regnum)
|
||
int blockend;
|
||
int regnum;
|
||
{
|
||
#if 0
|
||
/* this will be needed if fp registers are reinstated */
|
||
/* for now, you can look at them with 'info float'
|
||
* sys5 wont let you change them with ptrace anyway
|
||
*/
|
||
if (regnum >= FP0_REGNUM && regnum <= FP7_REGNUM)
|
||
{
|
||
int ubase, fpstate;
|
||
struct user u;
|
||
ubase = blockend + 4 * (SS + 1) - KSTKSZ;
|
||
fpstate = ubase + ((char *)&u.u_fpstate - (char *)&u);
|
||
return (fpstate + 0x1c + 10 * (regnum - FP0_REGNUM));
|
||
}
|
||
else
|
||
#endif
|
||
return (blockend + 4 * regmap[regnum]);
|
||
|
||
}
|
||
|
||
/* The code below only work on the aix ps/2 (i386-ibm-aix) -
|
||
* mtranle@paris - Sat Apr 11 10:34:12 1992
|
||
*/
|
||
|
||
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
|
||
print_387_status (status, ep)
|
||
unsigned short status;
|
||
struct env387 *ep;
|
||
{
|
||
int i;
|
||
int bothstatus;
|
||
int top;
|
||
int fpreg;
|
||
unsigned char *p;
|
||
|
||
bothstatus = ((status != 0) && (ep->status != 0));
|
||
if (status != 0)
|
||
{
|
||
if (bothstatus)
|
||
printf_unfiltered ("u: ");
|
||
print_387_status_word (status);
|
||
}
|
||
|
||
if (ep->status != 0)
|
||
{
|
||
if (bothstatus)
|
||
printf_unfiltered ("e: ");
|
||
print_387_status_word (ep->status);
|
||
}
|
||
|
||
print_387_control_word (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 >> ((7 - 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]);
|
||
|
||
i387_to_double ((char *)ep->regs[fpreg], (char *)&val);
|
||
printf_unfiltered (" %#g\n", val);
|
||
}
|
||
}
|
||
|
||
static struct env387 core_env387;
|
||
|
||
void
|
||
i386_float_info ()
|
||
{
|
||
struct env387 fps;
|
||
int fpsaved = 0;
|
||
/* We need to reverse the order of the registers. Apparently AIX stores
|
||
the highest-numbered ones first. */
|
||
struct env387 fps_fixed;
|
||
int i;
|
||
|
||
if (inferior_pid)
|
||
{
|
||
char buf[10];
|
||
unsigned short status;
|
||
|
||
ptrace (PT_READ_FPR, inferior_pid, buf, offsetof(struct env387, status));
|
||
memcpy (&status, buf, sizeof (status));
|
||
fpsaved = status;
|
||
}
|
||
else
|
||
{
|
||
if ((fpsaved = core_env387.status) != 0)
|
||
memcpy(&fps, &core_env387, sizeof(fps));
|
||
}
|
||
|
||
if (fpsaved == 0)
|
||
{
|
||
printf_unfiltered ("no floating point status saved\n");
|
||
return;
|
||
}
|
||
|
||
if (inferior_pid)
|
||
{
|
||
int offset;
|
||
for (offset = 0; offset < sizeof(fps); offset += 10)
|
||
{
|
||
char buf[10];
|
||
ptrace (PT_READ_FPR, inferior_pid, buf, offset);
|
||
memcpy ((char *)&fps.control + offset, buf,
|
||
MIN(10, sizeof(fps) - offset));
|
||
}
|
||
}
|
||
fps_fixed = fps;
|
||
for (i = 0; i < 8; ++i)
|
||
memcpy (fps_fixed.regs[i], fps.regs[7 - i], 10);
|
||
print_387_status (0, &fps_fixed);
|
||
}
|
||
|
||
/* Fetch one register. */
|
||
static void
|
||
fetch_register (regno)
|
||
int regno;
|
||
{
|
||
char buf[MAX_REGISTER_RAW_SIZE];
|
||
if (regno < FP0_REGNUM)
|
||
*(int *)buf = ptrace (PT_READ_GPR, inferior_pid,
|
||
PT_REG(regmap[regno]), 0, 0);
|
||
else
|
||
ptrace (PT_READ_FPR, inferior_pid, buf,
|
||
(regno - FP0_REGNUM)*10 + offsetof(struct env387, regs));
|
||
supply_register (regno, buf);
|
||
}
|
||
|
||
void
|
||
fetch_inferior_registers (regno)
|
||
int regno;
|
||
{
|
||
if (regno < 0)
|
||
for (regno = 0; regno < NUM_REGS; regno++)
|
||
fetch_register (regno);
|
||
else
|
||
fetch_register (regno);
|
||
}
|
||
|
||
/* store one register */
|
||
static void
|
||
store_register (regno)
|
||
int regno;
|
||
{
|
||
char buf[80];
|
||
extern char registers[];
|
||
errno = 0;
|
||
if (regno < FP0_REGNUM)
|
||
ptrace (PT_WRITE_GPR, inferior_pid, PT_REG(regmap[regno]),
|
||
*(int *) ®isters[REGISTER_BYTE (regno)], 0);
|
||
else
|
||
ptrace (PT_WRITE_FPR, inferior_pid, ®isters[REGISTER_BYTE (regno)],
|
||
(regno - FP0_REGNUM)*10 + offsetof(struct env387, regs));
|
||
|
||
if (errno != 0)
|
||
{
|
||
sprintf (buf, "writing register number %d", regno);
|
||
perror_with_name (buf);
|
||
}
|
||
}
|
||
|
||
/* Store our register values back into the inferior.
|
||
If REGNO is -1, do this for all registers.
|
||
Otherwise, REGNO specifies which register (so we can save time). */
|
||
void
|
||
store_inferior_registers (regno)
|
||
int regno;
|
||
{
|
||
if (regno < 0)
|
||
for (regno = 0; regno < NUM_REGS; regno++)
|
||
store_register (regno);
|
||
else
|
||
store_register (regno);
|
||
}
|
||
|
||
#ifndef CD_AX /* defined in sys/i386/coredump.h */
|
||
# define CD_AX 0
|
||
# define CD_BX 1
|
||
# define CD_CX 2
|
||
# define CD_DX 3
|
||
# define CD_SI 4
|
||
# define CD_DI 5
|
||
# define CD_BP 6
|
||
# define CD_SP 7
|
||
# define CD_FL 8
|
||
# define CD_IP 9
|
||
# define CD_CS 10
|
||
# define CD_DS 11
|
||
# define CD_ES 12
|
||
# define CD_FS 13
|
||
# define CD_GS 14
|
||
# define CD_SS 15
|
||
#endif
|
||
|
||
/*
|
||
* The order here in core_regmap[] has to be the same as in
|
||
* regmap[] above.
|
||
*/
|
||
static int core_regmap[] =
|
||
{
|
||
CD_AX, CD_CX, CD_DX, CD_BX,
|
||
CD_SP, CD_BP, CD_SI, CD_DI,
|
||
CD_IP, CD_FL, CD_CS, CD_SS,
|
||
CD_DS, CD_ES, CD_FS, CD_GS,
|
||
};
|
||
|
||
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; /* ignored */
|
||
{
|
||
|
||
if (which == 0)
|
||
{
|
||
/* Integer registers */
|
||
|
||
#define cd_regs(n) ((int *)core_reg_sect)[n]
|
||
#define regs(n) *((int *) ®isters[REGISTER_BYTE (n)])
|
||
|
||
int i;
|
||
for (i = 0; i < FP0_REGNUM; i++)
|
||
regs(i) = cd_regs(core_regmap[i]);
|
||
}
|
||
else if (which == 2)
|
||
{
|
||
/* Floating point registers */
|
||
|
||
if (core_reg_size >= sizeof (core_env387))
|
||
memcpy (&core_env387, core_reg_sect, core_reg_size);
|
||
else
|
||
fprintf_unfiltered (gdb_stderr, "Couldn't read float regs from core file\n");
|
||
}
|
||
}
|
||
|
||
|
||
/* Register that we are able to handle i386aix core file formats.
|
||
FIXME: is this really bfd_target_unknown_flavour? */
|
||
|
||
static struct core_fns i386aix_core_fns =
|
||
{
|
||
bfd_target_unknown_flavour,
|
||
fetch_core_registers,
|
||
NULL
|
||
};
|
||
|
||
void
|
||
_initialize_core_i386aix ()
|
||
{
|
||
add_core_fns (&i386aix_core_fns);
|
||
}
|