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/* Native-dependent code for UltraSPARC systems running NetBSD.
Copyright 2002 Free Software Foundation, Inc.
Contributed by Wasabi Systems, 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 "inferior.h"
#include "regcache.h"
#include "sparcnbsd-tdep.h"
#include <sys/types.h>
#include <sys/ptrace.h>
#include <machine/reg.h>
/* NOTE: We don't bother with any of the deferred_store nonsense; it
makes things a lot more complicated than they need to be. */
/* Determine if PT_GETREGS fetches this register. */
static int
getregs_supplies (int regno)
{
/* FIXME: PS_REGNUM for 32-bit code. */
return (regno == TSTATE_REGNUM
|| regno == PC_REGNUM
|| regno == NPC_REGNUM
|| regno == Y_REGNUM
|| (regno >= G0_REGNUM && regno <= G7_REGNUM)
|| (regno >= O0_REGNUM && regno <= O7_REGNUM)
/* stack regs (handled by sparcnbsd_supply_reg) */
|| (regno >= L0_REGNUM && regno <= I7_REGNUM));
}
/* Determine if PT_GETFPREGS fetches this register. */
static int
getfpregs_supplies (int regno)
{
return ((regno >= FP0_REGNUM && regno <= (FP0_REGNUM + 47))
|| regno == FPS_REGNUM);
}
void
fetch_inferior_registers (int regno)
{
/* We don't use deferred stores. */
if (deferred_stores)
internal_error (__FILE__, __LINE__,
"fetch_inferior_registers: deferred stores pending");
if (regno == -1 || getregs_supplies (regno))
{
union {
struct reg32 regs32;
struct reg64 regs64;
} regs;
if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) ®s, 0) == -1)
perror_with_name ("Couldn't get registers");
if (gdbarch_ptr_bit (current_gdbarch) == 32)
sparcnbsd_supply_reg32 ((char *) ®s.regs32, regno);
else
sparcnbsd_supply_reg64 ((char *) ®s.regs64, regno);
if (regno != -1)
return;
}
if (regno == -1 || getfpregs_supplies (regno))
{
union {
struct fpreg32 fpregs32;
struct fpreg64 fpregs64;
} fpregs;
if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
perror_with_name ("Couldn't get floating point registers");
if (gdbarch_ptr_bit (current_gdbarch) == 32)
sparcnbsd_supply_fpreg32 ((char *) &fpregs.fpregs32, regno);
else
sparcnbsd_supply_fpreg64 ((char *) &fpregs.fpregs64, regno);
if (regno != -1)
return;
}
}
void
store_inferior_registers (int regno)
{
/* We don't use deferred stores. */
if (deferred_stores)
internal_error (__FILE__, __LINE__,
"store_inferior_registers: deferred stores pending");
if (regno == -1 || getregs_supplies (regno))
{
union {
struct reg32 regs32;
struct reg64 regs64;
} regs;
if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) ®s, 0) == -1)
perror_with_name ("Couldn't get registers");
if (gdbarch_ptr_bit (current_gdbarch) == 32)
sparcnbsd_fill_reg32 ((char *) ®s.regs32, regno);
else
sparcnbsd_fill_reg64 ((char *) ®s.regs64, regno);
if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) ®s, 0) == -1)
perror_with_name ("Couldn't write registers");
/* Deal with the stack regs. */
if (regno == -1 || regno == SP_REGNUM
|| (regno >= L0_REGNUM && regno <= I7_REGNUM))
{
CORE_ADDR sp = read_register (SP_REGNUM);
int i;
char buf[8];
if (sp & 1)
{
/* Registers are 64-bit. */
sp += 2047;
for (i = L0_REGNUM; i <= I7_REGNUM; i++)
{
if (regno == -1 || regno == SP_REGNUM || regno == i)
{
regcache_collect (i, buf);
target_write_memory (sp + ((i - L0_REGNUM) * 8),
buf, sizeof (buf));
}
}
}
else
{
/* Registers are 32-bit. Toss any sign-extension of the stack
pointer.
FIXME: We don't currently handle 32-bit code in a binary
that indicated LP64. Do we have to care about that? */
if (gdbarch_ptr_bit (current_gdbarch) != 32)
internal_error
(__FILE__, __LINE__,
"store_inferior_registers: 32-bit code in 64-bit inferior");
sp &= 0xffffffffUL;
for (i = L0_REGNUM; i <= I7_REGNUM; i++)
{
if (regno == -1 || regno == SP_REGNUM || regno == i)
{
regcache_collect (i, buf);
target_write_memory (sp + ((i - L0_REGNUM) * 4), buf, 4);
}
}
}
}
if (regno != -1)
return;
}
if (regno == -1 || getfpregs_supplies (regno))
{
union {
struct fpreg32 fpregs32;
struct fpreg64 fpregs64;
} fpregs;
if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
perror_with_name ("Couldn't get floating point registers");
if (gdbarch_ptr_bit (current_gdbarch) == 32)
sparcnbsd_fill_fpreg32 ((char *) &fpregs.fpregs32, regno);
else
sparcnbsd_fill_fpreg64 ((char *) &fpregs.fpregs64, regno);
if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
perror_with_name ("Couldn't write floating point registers");
if (regno != -1)
return;
}
}
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