/* PPC GNU/Linux native support.
- Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001, 2002,
- 2003 Free Software Foundation, Inc.
+ Copyright (C) 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001, 2002,
+ 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
This file is part of GDB.
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. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#include "defs.h"
#include "gdb_string.h"
#include "gdbcore.h"
#include "regcache.h"
#include "gdb_assert.h"
+#include "target.h"
+#include "linux-nat.h"
#include <sys/types.h>
#include <sys/param.h>
#define PTRACE_SETEVRREGS 21
#endif
+/* Similarly for the hardware watchpoint support. */
+#ifndef PTRACE_GET_DEBUGREG
+#define PTRACE_GET_DEBUGREG 25
+#endif
+#ifndef PTRACE_SET_DEBUGREG
+#define PTRACE_SET_DEBUGREG 26
+#endif
+#ifndef PTRACE_GETSIGINFO
+#define PTRACE_GETSIGINFO 0x4202
+#endif
/* This oddity is because the Linux kernel defines elf_vrregset_t as
an array of 33 16 bytes long elements. I.e. it leaves out vrsave.
error. */
int have_ptrace_getvrregs = 1;
+static CORE_ADDR last_stopped_data_address = 0;
/* Non-zero if our kernel may support the PTRACE_GETEVRREGS and
PTRACE_SETEVRREGS requests, for reading and writing the SPE
error. */
int have_ptrace_getsetevrregs = 1;
-
int
kernel_u_size (void)
{
have_ptrace_getvrregs = 0;
return;
}
- perror_with_name ("Unable to fetch AltiVec register");
+ perror_with_name (_("Unable to fetch AltiVec register"));
}
/* VSCR is fetched as a 16 bytes quantity, but it is really 4 bytes
have_ptrace_getsetevrregs = 0;
else
/* Anything else needs to be reported. */
- perror_with_name ("Unable to fetch SPE registers");
+ perror_with_name (_("Unable to fetch SPE registers"));
}
}
}
else
internal_error (__FILE__, __LINE__,
- "fetch_register: unexpected byte order: %d",
+ _("fetch_register: unexpected byte order: %d"),
gdbarch_byte_order (current_gdbarch));
}
have_ptrace_getvrregs = 0;
return;
}
- perror_with_name ("Unable to fetch AltiVec registers");
+ perror_with_name (_("Unable to fetch AltiVec registers"));
}
supply_vrregset (®s);
}
/* Fetch registers from the child process. Fetch all registers if
regno == -1, otherwise fetch all general registers or all floating
point registers depending upon the value of regno. */
-void
-fetch_inferior_registers (int regno)
+static void
+ppc_linux_fetch_inferior_registers (int regno)
{
/* Overload thread id onto process id */
int tid = TIDGET (inferior_ptid);
have_ptrace_getvrregs = 0;
return;
}
- perror_with_name ("Unable to fetch AltiVec register");
+ perror_with_name (_("Unable to fetch AltiVec register"));
}
/* VSCR is fetched as a 16 bytes quantity, but it is really 4 bytes
ret = ptrace (PTRACE_SETVRREGS, tid, 0, ®s);
if (ret < 0)
- perror_with_name ("Unable to store AltiVec register");
+ perror_with_name (_("Unable to store AltiVec register"));
}
/* Assuming TID referrs to an SPE process, set the top halves of TID's
have_ptrace_getsetevrregs = 0;
else
/* Anything else needs to be reported. */
- perror_with_name ("Unable to set SPE registers");
+ perror_with_name (_("Unable to set SPE registers"));
}
}
}
have_ptrace_getvrregs = 0;
return;
}
- perror_with_name ("Couldn't get AltiVec registers");
+ perror_with_name (_("Couldn't get AltiVec registers"));
}
fill_vrregset (®s);
if (ptrace (PTRACE_SETVRREGS, tid, 0, ®s) < 0)
- perror_with_name ("Couldn't write AltiVec registers");
+ perror_with_name (_("Couldn't write AltiVec registers"));
}
static void
store_spe_register (tid, -1);
}
-void
-store_inferior_registers (int regno)
+static int
+ppc_linux_check_watch_resources (int type, int cnt, int ot)
+{
+ int tid;
+ ptid_t ptid = inferior_ptid;
+
+ /* DABR (data address breakpoint register) is optional for PPC variants.
+ Some variants have one DABR, others have none. So CNT can't be larger
+ than 1. */
+ if (cnt > 1)
+ return 0;
+
+ /* We need to know whether ptrace supports PTRACE_SET_DEBUGREG and whether
+ the target has DABR. If either answer is no, the ptrace call will
+ return -1. Fail in that case. */
+ tid = TIDGET (ptid);
+ if (tid == 0)
+ tid = PIDGET (ptid);
+
+ if (ptrace (PTRACE_SET_DEBUGREG, tid, 0, 0) == -1)
+ return 0;
+ return 1;
+}
+
+static int
+ppc_linux_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
+{
+ /* Handle sub-8-byte quantities. */
+ if (len <= 0)
+ return 0;
+
+ /* addr+len must fall in the 8 byte watchable region. */
+ if ((addr + len) > (addr & ~7) + 8)
+ return 0;
+
+ return 1;
+}
+
+/* Set a watchpoint of type TYPE at address ADDR. */
+static long
+ppc_linux_insert_watchpoint (CORE_ADDR addr, int len, int rw)
+{
+ int tid;
+ long dabr_value;
+ ptid_t ptid = inferior_ptid;
+
+ dabr_value = addr & ~7;
+ switch (rw)
+ {
+ case hw_read:
+ /* Set read and translate bits. */
+ dabr_value |= 5;
+ break;
+ case hw_write:
+ /* Set write and translate bits. */
+ dabr_value |= 6;
+ break;
+ case hw_access:
+ /* Set read, write and translate bits. */
+ dabr_value |= 7;
+ break;
+ }
+
+ tid = TIDGET (ptid);
+ if (tid == 0)
+ tid = PIDGET (ptid);
+
+ return ptrace (PTRACE_SET_DEBUGREG, tid, 0, dabr_value);
+}
+
+static long
+ppc_linux_remove_watchpoint (CORE_ADDR addr, int len)
+{
+ int tid;
+ ptid_t ptid = inferior_ptid;
+
+ tid = TIDGET (ptid);
+ if (tid == 0)
+ tid = PIDGET (ptid);
+
+ return ptrace (PTRACE_SET_DEBUGREG, tid, 0, 0);
+}
+
+static int
+ppc_linux_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
+{
+ if (last_stopped_data_address)
+ {
+ *addr_p = last_stopped_data_address;
+ last_stopped_data_address = 0;
+ return 1;
+ }
+ return 0;
+}
+
+static int
+ppc_linux_stopped_by_watchpoint (void)
+{
+ int tid;
+ struct siginfo siginfo;
+ ptid_t ptid = inferior_ptid;
+ CORE_ADDR *addr_p;
+
+ tid = TIDGET(ptid);
+ if (tid == 0)
+ tid = PIDGET (ptid);
+
+ errno = 0;
+ ptrace (PTRACE_GETSIGINFO, tid, (PTRACE_TYPE_ARG3) 0, &siginfo);
+
+ if (errno != 0 || siginfo.si_signo != SIGTRAP ||
+ (siginfo.si_code & 0xffff) != 0x0004)
+ return 0;
+
+ last_stopped_data_address = (CORE_ADDR) siginfo.si_addr;
+ return 1;
+}
+
+static void
+ppc_linux_store_inferior_registers (int regno)
{
/* Overload thread id onto process id */
int tid = TIDGET (inferior_ptid);
right_fill_reg (tdep->ppc_fpscr_regnum, (fpp + 8 * 32));
}
}
+
+void _initialize_ppc_linux_nat (void);
+
+void
+_initialize_ppc_linux_nat (void)
+{
+ struct target_ops *t;
+
+ /* Fill in the generic GNU/Linux methods. */
+ t = linux_target ();
+
+ /* Add our register access methods. */
+ t->to_fetch_registers = ppc_linux_fetch_inferior_registers;
+ t->to_store_registers = ppc_linux_store_inferior_registers;
+
+ /* Add our watchpoint methods. */
+ t->to_can_use_hw_breakpoint = ppc_linux_check_watch_resources;
+ t->to_region_ok_for_hw_watchpoint = ppc_linux_region_ok_for_hw_watchpoint;
+ t->to_insert_watchpoint = ppc_linux_insert_watchpoint;
+ t->to_remove_watchpoint = ppc_linux_remove_watchpoint;
+ t->to_stopped_by_watchpoint = ppc_linux_stopped_by_watchpoint;
+ t->to_stopped_data_address = ppc_linux_stopped_data_address;
+
+ /* Register the target. */
+ add_target (t);
+}
projects / deliverable / binutils-gdb.git / blobdiff