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/* Native-dependent code for SPARC.
Copyright 2003 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 "inferior.h"
#include "regcache.h"
/* We need a data structure for use with ptrace(2). SunOS 4 has
`struct regs' and `struct fp_status' in <machine/reg.h>. BSD's
have `struct reg' and `struct fpreg' in <machine/reg.h>. GNU/Linux
has the same structures as SunOS 4, but they're in <asm/reg.h>,
which is a kernel header. As a general rule we avoid including
GNU/Linux kernel headers. Fortunately GNU/Linux has a `gregset_t'
and a `fpregset_t' that are equivalent to `struct regs' and `struct
fp_status' in <sys/ucontext.h>, which is automatically included by
<signal.h>. Settling on using the `gregset_t' and `fpregset_t'
typedefs, providing them for the other systems, therefore solves
the puzzle. */
#include <signal.h>
#include <sys/ptrace.h>
#include "gdb_wait.h"
#ifdef HAVE_MACHINE_REG_H
#include <machine/reg.h>
#ifdef HAVE_STRUCT_REG
typedef struct reg gregset_t;
typedef struct fpreg fpregset_t;
#else
typedef struct regs gregset_t;
typedef struct fp_status fpregset_t;
#endif
#endif
#include "sparc-tdep.h"
/* Register set description. */
const struct sparc_gregset *sparc_gregset;
/* Determine whether `gregset_t' contains register REGNUM. */
int
sparc_gregset_supplies_p (int regnum)
{
/* Integer registers. */
if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_G7_REGNUM)
|| (regnum >= SPARC_O0_REGNUM && regnum <= SPARC_O7_REGNUM)
|| (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_L7_REGNUM)
|| (regnum >= SPARC_I0_REGNUM && regnum <= SPARC_I7_REGNUM))
return 1;
/* Control registers. */
if (regnum == SPARC32_PC_REGNUM
|| regnum == SPARC32_NPC_REGNUM
|| regnum == SPARC32_PSR_REGNUM
|| regnum == SPARC32_Y_REGNUM)
return 1;
return 0;
}
/* Determine whether `fpregset_t' contains register REGNUM. */
static int
sparc_fpregset_supplies_p (int regnum)
{
/* Floating-point registers. */
if (regnum >= SPARC_F0_REGNUM && regnum <= SPARC_F31_REGNUM)
return 1;
/* Control registers. */
if (regnum == SPARC32_FSR_REGNUM)
return 1;
return 0;
}
/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
for all registers (including the floating-point registers). */
void
fetch_inferior_registers (int regnum)
{
struct regcache *regcache = current_regcache;
if (regnum == SPARC_G0_REGNUM)
{
regcache_raw_supply (regcache, SPARC_G0_REGNUM, NULL);
return;
}
if (regnum == -1 || sparc_gregset_supplies_p (regnum))
{
gregset_t regs;
if (ptrace (PTRACE_GETREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) ®s, 0) == -1)
perror_with_name ("Couldn't get registers");
sparc_supply_gregset (sparc_gregset, regcache, -1, ®s);
if (regnum != -1)
return;
}
if (regnum == -1 || sparc_fpregset_supplies_p (regnum))
{
fpregset_t fpregs;
if (ptrace (PTRACE_GETFPREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
perror_with_name ("Couldn't get floating point status");
sparc_supply_fpregset (regcache, -1, &fpregs);
}
}
void
store_inferior_registers (int regnum)
{
struct regcache *regcache = current_regcache;
if (regnum == -1 || sparc_gregset_supplies_p (regnum))
{
gregset_t regs;
if (ptrace (PTRACE_GETREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) ®s, 0) == -1)
perror_with_name ("Couldn't get registers");
sparc_collect_gregset (sparc_gregset, regcache, regnum, ®s);
if (ptrace (PTRACE_SETREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) ®s, 0) == -1)
perror_with_name ("Couldn't write registers");
/* 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);
}
if (regnum != -1)
return;
}
if (regnum == -1 || sparc_fpregset_supplies_p (regnum))
{
fpregset_t fpregs;
if (ptrace (PTRACE_GETFPREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
perror_with_name ("Couldn't get floating-point registers");
sparc_collect_fpregset (regcache, regnum, &fpregs);
if (ptrace (PTRACE_SETFPREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
perror_with_name ("Couldn't write floating-point registers");
if (regnum != -1)
return;
}
}
/* Provide a prototype to silence -Wmissing-prototypes. */
void _initialize_sparc_nat (void);
void
_initialize_sparc_nat (void)
{
/* Deafult to using SunOS 4 register sets. */
if (sparc_gregset == NULL)
sparc_gregset = &sparc32_sunos4_gregset;
}
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