/* Native-dependent code for OpenBSD/powerpc.
- Copyright (C) 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2004, 2005, 2006, 2007 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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "gdbcore.h"
#include "inferior.h"
#include "regcache.h"
+#include "gdb_assert.h"
#include <stddef.h>
#include <sys/types.h>
#include <sys/ptrace.h>
#include "inf-ptrace.h"
#include "bsd-kvm.h"
-/* OpenBSD/powerpc doesn't have PT_GETFPREGS/PT_SETFPREGS like
- NetBSD/powerpc and FreeBSD/powerpc. */
+/* OpenBSD/powerpc didn't have PT_GETFPREGS/PT_SETFPREGS until release
+ 4.0. On older releases the floating-point registers are handled by
+ PT_GETREGS/PT_SETREGS, but fpscr wasn't available.. */
+
+#ifdef PT_GETFPREGS
+
+/* Returns true if PT_GETFPREGS fetches this register. */
+
+static int
+getfpregs_supplies (int regnum)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+
+ /* FIXME: jimb/2004-05-05: Some PPC variants don't have floating
+ point registers. Traditionally, GDB's register set has still
+ listed the floating point registers for such machines, so this
+ code is harmless. However, the new E500 port actually omits the
+ floating point registers entirely from the register set --- they
+ don't even have register numbers assigned to them.
+
+ It's not clear to me how best to update this code, so this assert
+ will alert the first person to encounter the NetBSD/E500
+ combination to the problem. */
+ gdb_assert (ppc_floating_point_unit_p (current_gdbarch));
+
+ return ((regnum >= tdep->ppc_fp0_regnum
+ && regnum < tdep->ppc_fp0_regnum + ppc_num_fprs)
+ || regnum == tdep->ppc_fpscr_regnum);
+}
+
+#endif /* PT_GETFPREGS */
/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
for all registers. */
static void
-ppcobsd_fetch_registers (int regnum)
+ppcobsd_fetch_registers (struct regcache *regcache, int regnum)
{
struct reg regs;
(PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't get registers"));
- ppcobsd_supply_gregset (&ppcobsd_gregset, current_regcache, -1,
- ®s, sizeof regs);
+ ppc_supply_gregset (&ppcobsd_gregset, regcache, -1,
+ ®s, sizeof regs);
+#ifndef PT_GETFPREGS
+ ppc_supply_fpregset (&ppcobsd_gregset, regcache, -1,
+ ®s, sizeof regs);
+#endif
+
+#ifdef PT_GETFPREGS
+ if (regnum == -1 || getfpregs_supplies (regnum))
+ {
+ struct fpreg fpregs;
+
+ if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
+ (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+ perror_with_name (_("Couldn't get floating point status"));
+
+ ppc_supply_fpregset (&ppcobsd_fpregset, regcache, -1,
+ &fpregs, sizeof fpregs);
+ }
+#endif
}
/* Store register REGNUM back into the inferior. If REGNUM is -1, do
this for all registers. */
static void
-ppcobsd_store_registers (int regnum)
+ppcobsd_store_registers (struct regcache *regcache, int regnum)
{
struct reg regs;
(PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't get registers"));
- ppcobsd_collect_gregset (&ppcobsd_gregset, current_regcache,
- regnum, ®s, sizeof regs);
+ ppc_collect_gregset (&ppcobsd_gregset, regcache,
+ regnum, ®s, sizeof regs);
+#ifndef PT_GETFPREGS
+ ppc_collect_fpregset (&ppcobsd_gregset, regcache,
+ regnum, ®s, sizeof regs);
+#endif
if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
(PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't write registers"));
+
+#ifdef PT_GETFPREGS
+ if (regnum == -1 || getfpregs_supplies (regnum))
+ {
+ struct fpreg fpregs;
+
+ if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
+ (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+ perror_with_name (_("Couldn't get floating point status"));
+
+ ppc_collect_fpregset (&ppcobsd_fpregset, regcache,
+ regnum, &fpregs, sizeof fpregs);
+
+ if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
+ (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+ perror_with_name (_("Couldn't write floating point status"));
+ }
+#endif
}
\f
return 0;
read_memory (pcb->pcb_sp, (gdb_byte *)&sf, sizeof sf);
- regcache_raw_supply (regcache, SP_REGNUM, &sf.sp);
+ regcache_raw_supply (regcache, gdbarch_sp_regnum (current_gdbarch), &sf.sp);
regcache_raw_supply (regcache, tdep->ppc_cr_regnum, &sf.cr);
regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 2, &sf.fixreg2);
for (i = 0, regnum = tdep->ppc_gp0_regnum + 13; i < 19; i++, regnum++)
regcache_raw_supply (regcache, regnum, &sf.fixreg[i]);
read_memory (sf.sp, (gdb_byte *)&cf, sizeof cf);
- regcache_raw_supply (regcache, PC_REGNUM, &cf.lr);
+ regcache_raw_supply (regcache, gdbarch_pc_regnum (current_gdbarch), &cf.lr);
regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 30, &cf.r30);
regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 31, &cf.r31);
/* Floating-point registers. */
ppcobsd_reg_offsets.f0_offset = offsetof (struct reg, fpr);
ppcobsd_reg_offsets.fpscr_offset = -1;
+#ifdef PT_GETFPREGS
+ ppcobsd_fpreg_offsets.f0_offset = offsetof (struct fpreg, fpr);
+ ppcobsd_fpreg_offsets.fpscr_offset = offsetof (struct fpreg, fpscr);
+#endif
/* AltiVec registers. */
ppcobsd_reg_offsets.vr0_offset = offsetof (struct vreg, vreg);
projects / deliverable / binutils-gdb.git / blobdiff