/* Functions specific to running gdb native on IA-64 running
GNU/Linux.
- Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
- Free Software Foundation, Inc.
+ Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
+ 2009, 2010 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 "gdb_string.h"
};
static CORE_ADDR
-ia64_register_addr (int regno)
+ia64_register_addr (struct gdbarch *gdbarch, int regno)
{
CORE_ADDR addr;
- if (regno < 0 || regno >= NUM_REGS)
+ if (regno < 0 || regno >= gdbarch_num_regs (gdbarch))
error (_("Invalid register number %d."), regno);
if (u_offsets[regno] == -1)
}
static int
-ia64_cannot_fetch_register (int regno)
+ia64_cannot_fetch_register (struct gdbarch *gdbarch, int regno)
{
- return regno < 0 || regno >= NUM_REGS || u_offsets[regno] == -1;
+ return regno < 0
+ || regno >= gdbarch_num_regs (gdbarch)
+ || u_offsets[regno] == -1;
}
static int
-ia64_cannot_store_register (int regno)
+ia64_cannot_store_register (struct gdbarch *gdbarch, int regno)
{
/* Rationale behind not permitting stores to bspstore...
were previously read from the inferior process to be written
back.) */
- return regno < 0 || regno >= NUM_REGS || u_offsets[regno] == -1
+ return regno < 0
+ || regno >= gdbarch_num_regs (gdbarch)
+ || u_offsets[regno] == -1
|| regno == IA64_BSPSTORE_REGNUM;
}
static void
enable_watchpoints_in_psr (ptid_t ptid)
{
- CORE_ADDR psr;
+ struct regcache *regcache = get_thread_regcache (ptid);
+ ULONGEST psr;
- psr = read_register_pid (IA64_PSR_REGNUM, ptid);
+ regcache_cooked_read_unsigned (regcache, IA64_PSR_REGNUM, &psr);
if (!(psr & IA64_PSR_DB))
{
psr |= IA64_PSR_DB; /* Set the db bit - this enables hardware
watchpoints and breakpoints. */
- write_register_pid (IA64_PSR_REGNUM, psr, ptid);
+ regcache_cooked_write_unsigned (regcache, IA64_PSR_REGNUM, psr);
}
}
-static long
-fetch_debug_register (ptid_t ptid, int idx)
-{
- long val;
- int tid;
-
- tid = TIDGET (ptid);
- if (tid == 0)
- tid = PIDGET (ptid);
-
- val = ptrace (PT_READ_U, tid, (PTRACE_TYPE_ARG3) (PT_DBR + 8 * idx), 0);
-
- return val;
-}
+static long debug_registers[8];
static void
store_debug_register (ptid_t ptid, int idx, long val)
(void) ptrace (PT_WRITE_U, tid, (PTRACE_TYPE_ARG3) (PT_DBR + 8 * idx), val);
}
-static void
-fetch_debug_register_pair (ptid_t ptid, int idx, long *dbr_addr, long *dbr_mask)
-{
- if (dbr_addr)
- *dbr_addr = fetch_debug_register (ptid, 2 * idx);
- if (dbr_mask)
- *dbr_mask = fetch_debug_register (ptid, 2 * idx + 1);
-}
-
static void
store_debug_register_pair (ptid_t ptid, int idx, long *dbr_addr, long *dbr_mask)
{
}
static int
-ia64_linux_insert_watchpoint (CORE_ADDR addr, int len, int rw)
+ia64_linux_insert_watchpoint (CORE_ADDR addr, int len, int rw,
+ struct expression *cond)
{
- ptid_t ptid = inferior_ptid;
+ struct lwp_info *lp;
+ ptid_t ptid;
int idx;
long dbr_addr, dbr_mask;
int max_watchpoints = 4;
for (idx = 0; idx < max_watchpoints; idx++)
{
- fetch_debug_register_pair (ptid, idx, NULL, &dbr_mask);
+ dbr_mask = debug_registers[idx * 2 + 1];
if ((dbr_mask & (0x3UL << 62)) == 0)
{
/* Exit loop if both r and w bits clear */
return -1;
}
- store_debug_register_pair (ptid, idx, &dbr_addr, &dbr_mask);
- enable_watchpoints_in_psr (ptid);
+ debug_registers[2 * idx] = dbr_addr;
+ debug_registers[2 * idx + 1] = dbr_mask;
+ ALL_LWPS (lp, ptid)
+ {
+ store_debug_register_pair (ptid, idx, &dbr_addr, &dbr_mask);
+ enable_watchpoints_in_psr (ptid);
+ }
return 0;
}
static int
-ia64_linux_remove_watchpoint (CORE_ADDR addr, int len, int type)
+ia64_linux_remove_watchpoint (CORE_ADDR addr, int len, int type,
+ struct expression *cond)
{
- ptid_t ptid = inferior_ptid;
int idx;
long dbr_addr, dbr_mask;
int max_watchpoints = 4;
for (idx = 0; idx < max_watchpoints; idx++)
{
- fetch_debug_register_pair (ptid, idx, &dbr_addr, &dbr_mask);
+ dbr_addr = debug_registers[2 * idx];
+ dbr_mask = debug_registers[2 * idx + 1];
if ((dbr_mask & (0x3UL << 62)) && addr == (CORE_ADDR) dbr_addr)
{
+ struct lwp_info *lp;
+ ptid_t ptid;
+
+ debug_registers[2 * idx] = 0;
+ debug_registers[2 * idx + 1] = 0;
dbr_addr = 0;
dbr_mask = 0;
- store_debug_register_pair (ptid, idx, &dbr_addr, &dbr_mask);
+
+ ALL_LWPS (lp, ptid)
+ store_debug_register_pair (ptid, idx, &dbr_addr, &dbr_mask);
+
return 0;
}
}
return -1;
}
+static void
+ia64_linux_new_thread (ptid_t ptid)
+{
+ int i, any;
+
+ any = 0;
+ for (i = 0; i < 8; i++)
+ {
+ if (debug_registers[i] != 0)
+ any = 1;
+ store_debug_register (ptid, i, debug_registers[i]);
+ }
+
+ if (any)
+ enable_watchpoints_in_psr (ptid);
+}
+
static int
ia64_linux_stopped_data_address (struct target_ops *ops, CORE_ADDR *addr_p)
{
CORE_ADDR psr;
- int tid;
- struct siginfo siginfo;
- ptid_t ptid = inferior_ptid;
+ struct siginfo *siginfo_p;
+ struct regcache *regcache = get_current_regcache ();
- tid = TIDGET(ptid);
- if (tid == 0)
- tid = PIDGET (ptid);
-
- errno = 0;
- ptrace (PTRACE_GETSIGINFO, tid, (PTRACE_TYPE_ARG3) 0, &siginfo);
+ siginfo_p = linux_nat_get_siginfo (inferior_ptid);
- if (errno != 0 || siginfo.si_signo != SIGTRAP ||
- (siginfo.si_code & 0xffff) != 0x0004 /* TRAP_HWBKPT */)
+ if (siginfo_p->si_signo != SIGTRAP
+ || (siginfo_p->si_code & 0xffff) != 0x0004 /* TRAP_HWBKPT */)
return 0;
- psr = read_register_pid (IA64_PSR_REGNUM, ptid);
+ regcache_cooked_read_unsigned (regcache, IA64_PSR_REGNUM, &psr);
psr |= IA64_PSR_DD; /* Set the dd bit - this will disable the watchpoint
for the next instruction */
- write_register_pid (IA64_PSR_REGNUM, psr, ptid);
+ regcache_cooked_write_unsigned (regcache, IA64_PSR_REGNUM, psr);
- *addr_p = (CORE_ADDR)siginfo.si_addr;
+ *addr_p = (CORE_ADDR)siginfo_p->si_addr;
return 1;
}
/* Fetch register REGNUM from the inferior. */
static void
-ia64_linux_fetch_register (int regnum)
+ia64_linux_fetch_register (struct regcache *regcache, int regnum)
{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
CORE_ADDR addr;
size_t size;
PTRACE_TYPE_RET *buf;
int pid, i;
- if (ia64_cannot_fetch_register (regnum))
+ if (ia64_cannot_fetch_register (gdbarch, regnum))
{
- regcache_raw_supply (current_regcache, regnum, NULL);
+ regcache_raw_supply (regcache, regnum, NULL);
return;
}
pid = ptid_get_pid (inferior_ptid);
/* This isn't really an address, but ptrace thinks of it as one. */
- addr = ia64_register_addr (regnum);
- size = register_size (current_gdbarch, regnum);
+ addr = ia64_register_addr (gdbarch, regnum);
+ size = register_size (gdbarch, regnum);
gdb_assert ((size % sizeof (PTRACE_TYPE_RET)) == 0);
buf = alloca (size);
buf[i] = ptrace (PT_READ_U, pid, (PTRACE_TYPE_ARG3)addr, 0);
if (errno != 0)
error (_("Couldn't read register %s (#%d): %s."),
- REGISTER_NAME (regnum), regnum, safe_strerror (errno));
+ gdbarch_register_name (gdbarch, regnum),
+ regnum, safe_strerror (errno));
addr += sizeof (PTRACE_TYPE_RET);
}
- regcache_raw_supply (current_regcache, regnum, buf);
+ regcache_raw_supply (regcache, regnum, buf);
}
/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
for all registers. */
static void
-ia64_linux_fetch_registers (int regnum)
+ia64_linux_fetch_registers (struct target_ops *ops,
+ struct regcache *regcache, int regnum)
{
if (regnum == -1)
- for (regnum = 0; regnum < NUM_REGS; regnum++)
- ia64_linux_fetch_register (regnum);
+ for (regnum = 0;
+ regnum < gdbarch_num_regs (get_regcache_arch (regcache));
+ regnum++)
+ ia64_linux_fetch_register (regcache, regnum);
else
- ia64_linux_fetch_register (regnum);
+ ia64_linux_fetch_register (regcache, regnum);
}
/* Store register REGNUM into the inferior. */
static void
-ia64_linux_store_register (int regnum)
+ia64_linux_store_register (const struct regcache *regcache, int regnum)
{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
CORE_ADDR addr;
size_t size;
PTRACE_TYPE_RET *buf;
int pid, i;
- if (ia64_cannot_store_register (regnum))
+ if (ia64_cannot_store_register (gdbarch, regnum))
return;
/* Cater for systems like GNU/Linux, that implement threads as
pid = ptid_get_pid (inferior_ptid);
/* This isn't really an address, but ptrace thinks of it as one. */
- addr = ia64_register_addr (regnum);
- size = register_size (current_gdbarch, regnum);
+ addr = ia64_register_addr (gdbarch, regnum);
+ size = register_size (gdbarch, regnum);
gdb_assert ((size % sizeof (PTRACE_TYPE_RET)) == 0);
buf = alloca (size);
/* Write the register contents into the inferior a chunk at a time. */
- regcache_raw_collect (current_regcache, regnum, buf);
+ regcache_raw_collect (regcache, regnum, buf);
for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
{
errno = 0;
ptrace (PT_WRITE_U, pid, (PTRACE_TYPE_ARG3)addr, buf[i]);
if (errno != 0)
error (_("Couldn't write register %s (#%d): %s."),
- REGISTER_NAME (regnum), regnum, safe_strerror (errno));
+ gdbarch_register_name (gdbarch, regnum),
+ regnum, safe_strerror (errno));
addr += sizeof (PTRACE_TYPE_RET);
}
this for all registers. */
static void
-ia64_linux_store_registers (int regnum)
+ia64_linux_store_registers (struct target_ops *ops,
+ struct regcache *regcache, int regnum)
{
if (regnum == -1)
- for (regnum = 0; regnum < NUM_REGS; regnum++)
- ia64_linux_store_register (regnum);
+ for (regnum = 0;
+ regnum < gdbarch_num_regs (get_regcache_arch (regcache));
+ regnum++)
+ ia64_linux_store_register (regcache, regnum);
else
- ia64_linux_store_register (regnum);
+ ia64_linux_store_register (regcache, regnum);
}
offset, len);
}
+/* For break.b instruction ia64 CPU forgets the immediate value and generates
+ SIGILL with ILL_ILLOPC instead of more common SIGTRAP with TRAP_BRKPT.
+ ia64 does not use gdbarch_decr_pc_after_break so we do not have to make any
+ difference for the signals here. */
+
+static int
+ia64_linux_status_is_event (int status)
+{
+ return WIFSTOPPED (status) && (WSTOPSIG (status) == SIGTRAP
+ || WSTOPSIG (status) == SIGILL);
+}
+
void _initialize_ia64_linux_nat (void);
void
_initialize_ia64_linux_nat (void)
{
- struct target_ops *t = linux_target ();
+ struct target_ops *t;
/* Fill in the generic GNU/Linux methods. */
t = linux_target ();
/* Register the target. */
linux_nat_add_target (t);
+ linux_nat_set_new_thread (t, ia64_linux_new_thread);
+ linux_nat_set_status_is_event (t, ia64_linux_status_is_event);
}