285 lines
7 KiB
C
285 lines
7 KiB
C
/* Native-dependent code for BSD Unix running on i386's, for GDB.
|
|
Copyright 1988, 1989, 1991, 1992, 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 "defs.h"
|
|
|
|
#ifdef FETCH_INFERIOR_REGISTERS
|
|
#include <sys/types.h>
|
|
#include <sys/ptrace.h>
|
|
#include <machine/reg.h>
|
|
#include <machine/frame.h>
|
|
#include "inferior.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, 4*NUM_REGS);
|
|
registers_fetched ();
|
|
}
|
|
|
|
void
|
|
store_inferior_registers(regno)
|
|
int regno;
|
|
{
|
|
struct reg inferior_registers;
|
|
|
|
memcpy (&inferior_registers, ®isters[REGISTER_BYTE (0)], 4*NUM_REGS);
|
|
ptrace (PT_SETREGS, inferior_pid, (PTRACE_ARG3_TYPE) &inferior_registers, 0);
|
|
}
|
|
|
|
struct md_core {
|
|
struct reg intreg;
|
|
struct fpreg freg;
|
|
};
|
|
|
|
void
|
|
fetch_core_registers (core_reg_sect, core_reg_size, which, ignore)
|
|
char *core_reg_sect;
|
|
unsigned core_reg_size;
|
|
int which;
|
|
CORE_ADDR ignore;
|
|
{
|
|
struct md_core *core_reg = (struct md_core *)core_reg_sect;
|
|
|
|
/* integer registers */
|
|
memcpy(®isters[REGISTER_BYTE (0)], &core_reg->intreg,
|
|
sizeof(struct reg));
|
|
/* floating point registers */
|
|
/* XXX */
|
|
}
|
|
|
|
#else
|
|
|
|
#include <machine/reg.h>
|
|
|
|
/* this table must line up with REGISTER_NAMES in tm-i386.h */
|
|
/* symbols like 'tEAX' come from <machine/reg.h> */
|
|
static int tregmap[] =
|
|
{
|
|
tEAX, tECX, tEDX, tEBX,
|
|
tESP, tEBP, tESI, tEDI,
|
|
tEIP, tEFLAGS, tCS, tSS
|
|
};
|
|
|
|
#ifdef sEAX
|
|
static int sregmap[] =
|
|
{
|
|
sEAX, sECX, sEDX, sEBX,
|
|
sESP, sEBP, sESI, sEDI,
|
|
sEIP, sEFLAGS, sCS, sSS
|
|
};
|
|
#else /* No sEAX */
|
|
|
|
/* FreeBSD has decided to collapse the s* and t* symbols. So if the s*
|
|
ones aren't around, use the t* ones for sregmap too. */
|
|
|
|
static int sregmap[] =
|
|
{
|
|
tEAX, tECX, tEDX, tEBX,
|
|
tESP, tEBP, tESI, tEDI,
|
|
tEIP, tEFLAGS, tCS, tSS
|
|
};
|
|
#endif /* No sEAX */
|
|
|
|
/* blockend is the value of u.u_ar0, and points to the
|
|
place where ES is stored. */
|
|
|
|
int
|
|
i386_register_u_addr (blockend, regnum)
|
|
int blockend;
|
|
int regnum;
|
|
{
|
|
/* The following condition is a kludge to get at the proper register map
|
|
depending upon the state of pcb_flag.
|
|
The proper condition would be
|
|
if (u.u_pcb.pcb_flag & FM_TRAP)
|
|
but that would require a ptrace call here and wouldn't work
|
|
for corefiles. */
|
|
|
|
if (blockend < 0x1fcc)
|
|
return (blockend + 4 * tregmap[regnum]);
|
|
else
|
|
return (blockend + 4 * sregmap[regnum]);
|
|
}
|
|
|
|
#endif /* !FETCH_INFERIOR_REGISTERS */
|
|
|
|
#ifdef FLOAT_INFO
|
|
#include "expression.h"
|
|
#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 ();
|
|
|
|
#define fpstate save87
|
|
#define U_FPSTATE(u) u.u_pcb.pcb_savefpu
|
|
|
|
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 ()
|
|
{
|
|
struct user u; /* just for address computations */
|
|
int i;
|
|
/* fpstate defined in <sys/user.h> */
|
|
struct fpstate *fpstatep;
|
|
char buf[sizeof (struct fpstate) + 2 * sizeof (int)];
|
|
unsigned int uaddr;
|
|
char fpvalid;
|
|
unsigned int rounded_addr;
|
|
unsigned int rounded_size;
|
|
/*extern int corechan;*/
|
|
int skip;
|
|
extern int inferior_pid;
|
|
|
|
uaddr = (char *)&U_FPSTATE(u) - (char *)&u;
|
|
if (inferior_pid)
|
|
{
|
|
int *ip;
|
|
|
|
rounded_addr = uaddr & -sizeof (int);
|
|
rounded_size = (((uaddr + sizeof (struct fpstate)) - uaddr) +
|
|
sizeof (int) - 1) / sizeof (int);
|
|
skip = uaddr - rounded_addr;
|
|
|
|
ip = (int *)buf;
|
|
for (i = 0; i < rounded_size; i++)
|
|
{
|
|
*ip++ = ptrace (PT_READ_U, inferior_pid, (caddr_t)rounded_addr, 0);
|
|
rounded_addr += sizeof (int);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
printf("float info: can't do a core file (yet)\n");
|
|
return;
|
|
#if 0
|
|
if (lseek (corechan, uaddr, 0) < 0)
|
|
perror_with_name ("seek on core file");
|
|
if (myread (corechan, buf, sizeof (struct fpstate)) < 0)
|
|
perror_with_name ("read from core file");
|
|
skip = 0;
|
|
#endif
|
|
}
|
|
|
|
print_387_status (0, (struct env387 *)buf);
|
|
}
|
|
|
|
int
|
|
kernel_u_size ()
|
|
{
|
|
return (sizeof (struct user));
|
|
}
|
|
|
|
#endif
|