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/* SPARC-specific portions of the RPC protocol for VxWorks.
Contributed by Wind River Systems.
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 "regcache.h"
#include "gdb_string.h"
#include "sparc-tdep.h"
#include "vx-share/ptrace.h"
#include "vx-share/regPacket.h"
#define SPARC_R_G1 (SPARC_R_G0 + SPARC_GREG_SIZE)
const struct sparc_gregset vxsparc_gregset =
{
SPARC_R_PSR, /* %psr */
SPARC_R_PC, /* %pc */
SPARC_R_NPC, /* %npc */
SPARC_R_Y, /* %y */
SPARC_R_WIM, /* %wim */
SPARC_R_TBR, /* %tbr */
SPARC_R_G1, /* %g1 */
SPARC_R_I0 /* %l0 */
};
/* Flag set if target has an FPU. */
extern int target_has_fp;
/* Generic register read/write routines in remote-vx.c. */
extern void net_read_registers ();
extern void net_write_registers ();
/* Read a register or registers from the VxWorks target. REGNUM is
the register to read, or -1 for all; currently, it is ignored.
FIXME: Look at REGNUM to improve efficiency. */
void
vx_read_register (int regnum)
{
struct regcache *regcache = current_regcache;
char gregs[SPARC_GREG_PLEN];
char fpregs[SPARC_FPREG_PLEN];
CORE_ADDR sp;
/* Get the general-purpose registers. */
net_read_registers (gregs, SPARC_GREG_PLEN, PTRACE_GETREGS);
sparc32_supply_gregset (&vxsparc_gregset, regcache, -1, gregs);
/* If the target has floating-point registers, fetch them.
Otherwise, zero the floating-point register values in GDB's
register cache for good measure, even though we might not need
to. */
if (target_has_fp)
net_read_registers (fpregs, SPARC_FPREG_PLEN, PTRACE_GETFPREGS);
else
memset (fpregs, 0, SPARC_FPREG_PLEN);
sparc32_supply_fpregset (regcache, -1, fpregs);
}
/* Store a register or registers into the VxWorks target. REGNUM is
the register to store, or -1 for all; currently, it is ignored.
FIXME: Look at REGNUM to improve efficiency. */
void
vx_write_register (int regnum)
{
struct regcache *regcache = current_regcache;
char gregs[SPARC_GREG_PLEN];
char fpregs[SPARC_FPREG_PLEN];
int gregs_p = 1;
int fpregs_p = 1;
CORE_ADDR sp;
if (regnum != -1)
{
if ((SPARC_G0_REGNUM <= regnum && regnum <= SPARC_I7_REGNUM)
|| (SPARC32_Y_REGNUM <= regnum && regnum <= SPARC32_NPC_REGNUM))
fpregs_p = 0;
else
gregs_p = 0;
}
/* Store the general-purpose registers. */
if (gregs_p)
{
sparc32_collect_gregset (&vxsparc_gregset, regcache, -1, gregs);
net_write_registers (gregs, SPARC_GREG_PLEN, PTRACE_SETREGS);
/* Deal with the stack regs. */
if (regnum == -1 || regnum == SPARC_SP_REGNUM
|| (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_I7_REGNUM))
{
ULONGEST sp;
regcache_cooked_read_unsigned (regcache, SPARC_SP_REGNUM, &sp);
sparc_collect_rwindow (regcache, sp, regnum);
}
}
/* Store the floating-point registers if the target has them. */
if (fpregs_p && target_has_fp)
{
sparc32_collect_fpregset (regcache, -1, fpregs);
net_write_registers (fpregs, SPARC_FPREG_PLEN, PTRACE_SETFPREGS);
}
}
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