binutils-gdb/gdb/hp300ux-nat.c

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/* HP/UX native interface for HP 300's, for GDB when running under Unix.
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Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1996, 1999, 2000,
2001 Free Software Foundation, Inc.
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This file is part of GDB.
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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.
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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 "regcache.h"
/* Defining this means some system include files define some extra stuff. */
#define WOPR
#include <sys/param.h>
#include <signal.h>
#include <sys/user.h>
#include <fcntl.h>
#include <sys/ptrace.h>
#include <sys/reg.h>
#include <sys/trap.h>
#include <sys/file.h>
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static void fetch_inferior_register (int, unsigned int);
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static void store_inferior_register_1 (int, unsigned int, int);
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static void store_inferior_register (int, unsigned int);
/* Get kernel_u_addr using HPUX-style nlist(). */
CORE_ADDR kernel_u_addr;
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struct hpnlist
{
char *n_name;
long n_value;
unsigned char n_type;
unsigned char n_length;
short n_almod;
short n_unused;
};
static struct hpnlist nl[] =
{
{"_u", -1,},
{(char *) 0,}};
/* read the value of the u area from the hp-ux kernel */
void
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_initialize_hp300ux_nat (void)
{
#ifndef HPUX_VERSION_5
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nlist ("/hp-ux", nl);
kernel_u_addr = nl[0].n_value;
#else /* HPUX version 5. */
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kernel_u_addr = (CORE_ADDR) 0x0097900;
#endif
}
#define INFERIOR_AR0(u) \
((ptrace \
(PT_RUAREA, inferior_pid, \
(PTRACE_ARG3_TYPE) ((char *) &u.u_ar0 - (char *) &u), 0, 0)) \
- kernel_u_addr)
static void
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fetch_inferior_register (register int regno, register unsigned int regaddr)
{
#ifndef HPUX_VERSION_5
if (regno == PS_REGNUM)
{
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union
{
int i;
short s[2];
}
ps_val;
int regval;
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ps_val.i = (ptrace (PT_RUAREA, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
0, 0));
regval = ps_val.s[0];
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supply_register (regno, (char *) &regval);
}
else
#endif /* not HPUX_VERSION_5 */
{
char buf[MAX_REGISTER_RAW_SIZE];
register int i;
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for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
{
*(int *) &buf[i] = ptrace (PT_RUAREA, inferior_pid,
(PTRACE_ARG3_TYPE) regaddr, 0, 0);
regaddr += sizeof (int);
}
supply_register (regno, buf);
}
return;
}
static void
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store_inferior_register_1 (int regno, unsigned int regaddr, int val)
{
errno = 0;
ptrace (PT_WUAREA, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, val, 0);
#if 0
/* HP-UX randomly sets errno to non-zero for regno == 25.
However, the value is correctly written, so ignore errno. */
if (errno != 0)
{
char string_buf[64];
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sprintf (string_buf, "writing register number %d", regno);
perror_with_name (string_buf);
}
#endif
return;
}
static void
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store_inferior_register (register int regno, register unsigned int regaddr)
{
#ifndef HPUX_VERSION_5
if (regno == PS_REGNUM)
{
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union
{
int i;
short s[2];
}
ps_val;
ps_val.i = (ptrace (PT_RUAREA, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
0, 0));
ps_val.s[0] = (read_register (regno));
store_inferior_register_1 (regno, regaddr, ps_val.i);
}
else
#endif /* not HPUX_VERSION_5 */
{
register int i;
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for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
{
store_inferior_register_1
(regno, regaddr,
(*(int *) &registers[(REGISTER_BYTE (regno)) + i]));
regaddr += sizeof (int);
}
}
return;
}
void
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fetch_inferior_registers (int regno)
{
struct user u;
register unsigned int ar0_offset;
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ar0_offset = (INFERIOR_AR0 (u));
if (regno == -1)
{
for (regno = 0; (regno < FP0_REGNUM); regno++)
fetch_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno)));
for (; (regno < NUM_REGS); regno++)
fetch_inferior_register (regno, (FP_REGISTER_ADDR (u, regno)));
}
else
fetch_inferior_register (regno,
(regno < FP0_REGNUM
? REGISTER_ADDR (ar0_offset, regno)
: FP_REGISTER_ADDR (u, regno)));
}
/* 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
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store_inferior_registers (register int regno)
{
struct user u;
register unsigned int ar0_offset;
if (regno >= FP0_REGNUM)
{
store_inferior_register (regno, (FP_REGISTER_ADDR (u, regno)));
return;
}
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ar0_offset = (INFERIOR_AR0 (u));
if (regno >= 0)
{
store_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno)));
return;
}
for (regno = 0; (regno < FP0_REGNUM); regno++)
store_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno)));
for (; (regno < NUM_REGS); regno++)
store_inferior_register (regno, (FP_REGISTER_ADDR (u, regno)));
return;
}
int
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getpagesize (void)
{
return 4096;
}