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authorAndreas Tobler <andreast@sourceware.org>2013-02-04 20:48:53 +0000
committerAndreas Tobler <andreast@sourceware.org>2013-02-04 20:48:53 +0000
commitdc18f110f27f10ae55016f27d95d4afed24cde9b (patch)
treed555b8c3789dda09b24469005d261994ca39e5c2 /gdb/ppcfbsd-nat.c
parentace9af6f593847aa70a0a88b1cfc9afbfc2c1d94 (diff)
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2013-02-04 Andreas Tobler <andreast@fgznet.ch>
* Makefile.in (ALL_TARGET_OBS): Add powerpc FreeBSD files. * configure.host: Add powerpc*-*-freebsd* target. * configure.tgt: Add target info for powerpc*-*-freebsd*. * ppcfbsd-nat.c, ppcfbsd-tdep.h, ppcfbsd-tdep.c: New files. * config/powerpc/fbsd.mh: New file.
Diffstat (limited to 'gdb/ppcfbsd-nat.c')
-rw-r--r--gdb/ppcfbsd-nat.c224
1 files changed, 224 insertions, 0 deletions
diff --git a/gdb/ppcfbsd-nat.c b/gdb/ppcfbsd-nat.c
new file mode 100644
index 0000000..190d460
--- /dev/null
+++ b/gdb/ppcfbsd-nat.c
@@ -0,0 +1,224 @@
+/* Native-dependent code for PowerPC's running FreeBSD, for GDB.
+
+ Copyright (C) 2013 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 3 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, 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/procfs.h>
+#include <sys/ptrace.h>
+#include <sys/signal.h>
+#include <machine/frame.h>
+#include <machine/pcb.h>
+#include <machine/reg.h>
+
+#include "fbsd-nat.h"
+#include "gregset.h"
+#include "ppc-tdep.h"
+#include "ppcfbsd-tdep.h"
+#include "inf-ptrace.h"
+#include "bsd-kvm.h"
+
+/* Fill GDB's register array with the general-purpose register values
+ in *GREGSETP. */
+
+void
+supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp)
+{
+ const struct regset *regset = ppc_fbsd_gregset (sizeof (long));
+
+ ppc_supply_gregset (regset, regcache, -1, gregsetp, sizeof (*gregsetp));
+}
+
+/* Fill register REGNO (if a gpr) in *GREGSETP with the value in GDB's
+ register array. If REGNO is -1 do it for all registers. */
+
+void
+fill_gregset (const struct regcache *regcache,
+ gdb_gregset_t *gregsetp, int regno)
+{
+ const struct regset *regset = ppc_fbsd_gregset (sizeof (long));
+
+ if (regno == -1)
+ memset (gregsetp, 0, sizeof (*gregsetp));
+ ppc_collect_gregset (regset, regcache, regno, gregsetp, sizeof (*gregsetp));
+}
+
+/* Fill GDB's register array with the floating-point register values
+ in *FPREGSETP. */
+
+void
+supply_fpregset (struct regcache *regcache, const gdb_fpregset_t * fpregsetp)
+{
+ const struct regset *regset = ppc_fbsd_fpregset ();
+
+ ppc_supply_fpregset (regset, regcache, -1,
+ fpregsetp, sizeof (*fpregsetp));
+}
+
+/* Fill register REGNO in *FGREGSETP with the value in GDB's
+ register array. If REGNO is -1 do it for all registers. */
+
+void
+fill_fpregset (const struct regcache *regcache,
+ gdb_fpregset_t *fpregsetp, int regno)
+{
+ const struct regset *regset = ppc_fbsd_fpregset ();
+
+ ppc_collect_fpregset (regset, regcache, regno,
+ fpregsetp, sizeof (*fpregsetp));
+}
+
+/* Returns true if PT_GETFPREGS fetches this register. */
+
+static int
+getfpregs_supplies (struct gdbarch *gdbarch, int regno)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (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 (gdbarch));
+
+ return ((regno >= tdep->ppc_fp0_regnum
+ && regno < tdep->ppc_fp0_regnum + ppc_num_fprs)
+ || regno == tdep->ppc_fpscr_regnum);
+}
+
+/* Fetch register REGNO from the child process. If REGNO is -1, do it
+ for all registers. */
+
+static void
+ppcfbsd_fetch_inferior_registers (struct target_ops *ops,
+ struct regcache *regcache, int regno)
+{
+ gdb_gregset_t regs;
+
+ if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
+ (PTRACE_TYPE_ARG3) &regs, 0) == -1)
+ perror_with_name (_("Couldn't get registers"));
+
+ supply_gregset (regcache, &regs);
+
+ if (regno == -1 || getfpregs_supplies (get_regcache_arch (regcache), regno))
+ {
+ const struct regset *fpregset = ppc_fbsd_fpregset ();
+ gdb_fpregset_t fpregs;
+
+ if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
+ (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+ perror_with_name (_("Couldn't get FP registers"));
+
+ ppc_supply_fpregset (fpregset, regcache, regno, &fpregs, sizeof fpregs);
+ }
+}
+
+/* Store register REGNO back into the child process. If REGNO is -1,
+ do this for all registers. */
+
+static void
+ppcfbsd_store_inferior_registers (struct target_ops *ops,
+ struct regcache *regcache, int regno)
+{
+ gdb_gregset_t regs;
+
+ if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
+ (PTRACE_TYPE_ARG3) &regs, 0) == -1)
+ perror_with_name (_("Couldn't get registers"));
+
+ fill_gregset (regcache, &regs, regno);
+
+ if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
+ (PTRACE_TYPE_ARG3) &regs, 0) == -1)
+ perror_with_name (_("Couldn't write registers"));
+
+ if (regno == -1 || getfpregs_supplies (get_regcache_arch (regcache), regno))
+ {
+ gdb_fpregset_t fpregs;
+
+ if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
+ (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+ perror_with_name (_("Couldn't get FP registers"));
+
+ fill_fpregset (regcache, &fpregs, regno);
+
+ if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
+ (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+ perror_with_name (_("Couldn't set FP registers"));
+ }
+}
+
+/* Architecture specific function that reconstructs the
+ register state from PCB (Process Control Block) and supplies it
+ to REGCACHE. */
+
+static int
+ppcfbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ int i, regnum;
+
+ /* The stack pointer shouldn't be zero. */
+ if (pcb->pcb_sp == 0)
+ return 0;
+
+ regcache_raw_supply (regcache, gdbarch_sp_regnum (gdbarch), &pcb->pcb_sp);
+ regcache_raw_supply (regcache, tdep->ppc_cr_regnum, &pcb->pcb_cr);
+ regcache_raw_supply (regcache, tdep->ppc_lr_regnum, &pcb->pcb_lr);
+ for (i = 0, regnum = tdep->ppc_gp0_regnum + 14; i < 20; i++, regnum++)
+ regcache_raw_supply (regcache, regnum, &pcb->pcb_context[i]);
+
+ return 1;
+}
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+
+void _initialize_ppcfbsd_nat (void);
+
+void
+_initialize_ppcfbsd_nat (void)
+{
+ struct target_ops *t;
+
+ /* Add in local overrides. */
+ t = inf_ptrace_target ();
+ t->to_fetch_registers = ppcfbsd_fetch_inferior_registers;
+ t->to_store_registers = ppcfbsd_store_inferior_registers;
+ t->to_pid_to_exec_file = fbsd_pid_to_exec_file;
+ t->to_find_memory_regions = fbsd_find_memory_regions;
+ t->to_make_corefile_notes = fbsd_make_corefile_notes;
+ add_target (t);
+
+ /* Support debugging kernel virtual memory images. */
+ bsd_kvm_add_target (ppcfbsd_supply_pcb);
+}