-/* Functions specific to running gdb native on IA-64 running Linux.
- Copyright 1999, 2000 Free Software Foundation, Inc.
+/* 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.
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 "inferior.h"
#include "target.h"
#include "gdbcore.h"
+#include "regcache.h"
+#include "ia64-tdep.h"
+#include "linux-nat.h"
#include <signal.h>
#include <sys/ptrace.h>
-#include <sys/wait.h>
+#include "gdb_wait.h"
#ifdef HAVE_SYS_REG_H
#include <sys/reg.h>
#endif
+#include <sys/syscall.h>
#include <sys/user.h>
#include <asm/ptrace_offsets.h>
PT_PR,
PT_CR_IIP, /* ip */
PT_CR_IPSR, /* psr */
- PT_CR_IFS, /* cfm */
+ PT_CFM, /* cfm */
/* kernel registers not visible via ptrace interface (?) */
-1, -1, -1, -1, -1, -1, -1, -1,
/* hole */
-1, -1, -1, -1, -1, -1, -1, -1,
};
-CORE_ADDR
-register_addr (regno, blockend)
- int regno;
- CORE_ADDR blockend;
+static CORE_ADDR
+ia64_register_addr (int regno)
{
CORE_ADDR addr;
- if (regno < 0 || regno >= NUM_REGS)
- error ("Invalid register number %d.", regno);
+ if (regno < 0 || regno >= gdbarch_num_regs (current_gdbarch))
+ error (_("Invalid register number %d."), regno);
if (u_offsets[regno] == -1)
addr = 0;
return addr;
}
-int ia64_cannot_fetch_register (regno)
- int regno;
+static int
+ia64_cannot_fetch_register (int regno)
{
- return regno < 0 || regno >= NUM_REGS || u_offsets[regno] == -1;
+ return regno < 0
+ || regno >= gdbarch_num_regs (current_gdbarch)
+ || u_offsets[regno] == -1;
}
-int ia64_cannot_store_register (regno)
- int regno;
+static int
+ia64_cannot_store_register (int regno)
{
/* Rationale behind not permitting stores to bspstore...
to be changed by (roughly) N as well. (It could be N-1 or N+1
depending upon where the NaT collection bits fall.)
- OTOH, the linux kernel provides read/write access to bsp (and
+ OTOH, the Linux kernel provides read/write access to bsp (and
currently read/write access to bspstore as well). But it
is definitely the case that if you change one, the other
will change at the same time. It is more useful to gdb to
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 (current_gdbarch)
+ || u_offsets[regno] == -1
|| regno == IA64_BSPSTORE_REGNUM;
}
void
-supply_gregset (gregsetp)
- gregset_t *gregsetp;
+supply_gregset (struct regcache *regcache, const gregset_t *gregsetp)
{
int regi;
- greg_t *regp = (greg_t *) gregsetp;
+ const greg_t *regp = (const greg_t *) gregsetp;
for (regi = IA64_GR0_REGNUM; regi <= IA64_GR31_REGNUM; regi++)
{
- supply_register (regi, (char *) (regp + (regi - IA64_GR0_REGNUM)));
+ regcache_raw_supply (regcache, regi, regp + (regi - IA64_GR0_REGNUM));
}
/* FIXME: NAT collection bits are at index 32; gotta deal with these
somehow... */
- supply_register (IA64_PR_REGNUM, (char *) (regp + 33));
+ regcache_raw_supply (regcache, IA64_PR_REGNUM, regp + 33);
for (regi = IA64_BR0_REGNUM; regi <= IA64_BR7_REGNUM; regi++)
{
- supply_register (regi, (char *) (regp + 34 + (regi - IA64_BR0_REGNUM)));
+ regcache_raw_supply (regcache, regi,
+ regp + 34 + (regi - IA64_BR0_REGNUM));
}
- supply_register (IA64_IP_REGNUM, (char *) (regp + 42));
- supply_register (IA64_CFM_REGNUM, (char *) (regp + 43));
- supply_register (IA64_PSR_REGNUM, (char *) (regp + 44));
- supply_register (IA64_RSC_REGNUM, (char *) (regp + 45));
- supply_register (IA64_BSP_REGNUM, (char *) (regp + 46));
- supply_register (IA64_BSPSTORE_REGNUM, (char *) (regp + 47));
- supply_register (IA64_RNAT_REGNUM, (char *) (regp + 48));
- supply_register (IA64_CCV_REGNUM, (char *) (regp + 49));
- supply_register (IA64_UNAT_REGNUM, (char *) (regp + 50));
- supply_register (IA64_FPSR_REGNUM, (char *) (regp + 51));
- supply_register (IA64_PFS_REGNUM, (char *) (regp + 52));
- supply_register (IA64_LC_REGNUM, (char *) (regp + 53));
- supply_register (IA64_EC_REGNUM, (char *) (regp + 54));
+ regcache_raw_supply (regcache, IA64_IP_REGNUM, regp + 42);
+ regcache_raw_supply (regcache, IA64_CFM_REGNUM, regp + 43);
+ regcache_raw_supply (regcache, IA64_PSR_REGNUM, regp + 44);
+ regcache_raw_supply (regcache, IA64_RSC_REGNUM, regp + 45);
+ regcache_raw_supply (regcache, IA64_BSP_REGNUM, regp + 46);
+ regcache_raw_supply (regcache, IA64_BSPSTORE_REGNUM, regp + 47);
+ regcache_raw_supply (regcache, IA64_RNAT_REGNUM, regp + 48);
+ regcache_raw_supply (regcache, IA64_CCV_REGNUM, regp + 49);
+ regcache_raw_supply (regcache, IA64_UNAT_REGNUM, regp + 50);
+ regcache_raw_supply (regcache, IA64_FPSR_REGNUM, regp + 51);
+ regcache_raw_supply (regcache, IA64_PFS_REGNUM, regp + 52);
+ regcache_raw_supply (regcache, IA64_LC_REGNUM, regp + 53);
+ regcache_raw_supply (regcache, IA64_EC_REGNUM, regp + 54);
}
void
-fill_gregset (gregsetp, regno)
- gregset_t *gregsetp;
- int regno;
+fill_gregset (const struct regcache *regcache, gregset_t *gregsetp, int regno)
{
int regi;
greg_t *regp = (greg_t *) gregsetp;
#define COPY_REG(_idx_,_regi_) \
if ((regno == -1) || regno == _regi_) \
- memcpy (regp + _idx_, ®isters[REGISTER_BYTE (_regi_)], \
- REGISTER_RAW_SIZE (_regi_))
+ regcache_raw_collect (regcache, _regi_, regp + _idx_)
for (regi = IA64_GR0_REGNUM; regi <= IA64_GR31_REGNUM; regi++)
{
idea of the current floating point register values. */
void
-supply_fpregset (fpregsetp)
- fpregset_t *fpregsetp;
+supply_fpregset (struct regcache *regcache, const fpregset_t *fpregsetp)
{
- register int regi;
- char *from;
+ int regi;
+ const char *from;
for (regi = IA64_FR0_REGNUM; regi <= IA64_FR127_REGNUM; regi++)
{
- from = (char *) &((*fpregsetp)[regi - IA64_FR0_REGNUM]);
- supply_register (regi, from);
+ from = (const char *) &((*fpregsetp)[regi - IA64_FR0_REGNUM]);
+ regcache_raw_supply (regcache, regi, from);
}
}
them all. */
void
-fill_fpregset (fpregsetp, regno)
- fpregset_t *fpregsetp;
- int regno;
+fill_fpregset (const struct regcache *regcache,
+ fpregset_t *fpregsetp, int regno)
{
int regi;
- char *to;
- char *from;
for (regi = IA64_FR0_REGNUM; regi <= IA64_FR127_REGNUM; regi++)
{
if ((regno == -1) || (regno == regi))
- {
- from = (char *) ®isters[REGISTER_BYTE (regi)];
- to = (char *) &((*fpregsetp)[regi - IA64_FR0_REGNUM]);
- memcpy (to, from, REGISTER_RAW_SIZE (regi));
- }
+ regcache_raw_collect (regcache, regi,
+ &((*fpregsetp)[regi - IA64_FR0_REGNUM]));
}
}
#define IA64_PSR_DD (1UL << 39)
static void
-enable_watchpoints_in_psr (int pid)
+enable_watchpoints_in_psr (struct regcache *regcache)
{
- CORE_ADDR psr;
+ ULONGEST psr;
- psr = read_register_pid (IA64_PSR_REGNUM, pid);
+ 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, pid);
+ regcache_cooked_write_unsigned (regcache, IA64_PSR_REGNUM, psr);
}
}
static long
-fetch_debug_register (int pid, int idx)
+fetch_debug_register (ptid_t ptid, int idx)
{
long val;
int tid;
- tid = TIDGET(pid);
+ tid = TIDGET (ptid);
if (tid == 0)
- tid = pid;
+ tid = PIDGET (ptid);
- val = ptrace (PT_READ_U, tid, (PTRACE_ARG3_TYPE) (PT_DBR + 8 * idx), 0);
+ val = ptrace (PT_READ_U, tid, (PTRACE_TYPE_ARG3) (PT_DBR + 8 * idx), 0);
return val;
}
static void
-store_debug_register (int pid, int idx, long val)
+store_debug_register (ptid_t ptid, int idx, long val)
{
int tid;
- tid = TIDGET(pid);
+ tid = TIDGET (ptid);
if (tid == 0)
- tid = pid;
+ tid = PIDGET (ptid);
- (void) ptrace (PT_WRITE_U, tid, (PTRACE_ARG3_TYPE) (PT_DBR + 8 * idx), val);
+ (void) ptrace (PT_WRITE_U, tid, (PTRACE_TYPE_ARG3) (PT_DBR + 8 * idx), val);
}
static void
-fetch_debug_register_pair (int pid, int idx, long *dbr_addr, long *dbr_mask)
+fetch_debug_register_pair (ptid_t ptid, int idx, long *dbr_addr, long *dbr_mask)
{
if (dbr_addr)
- *dbr_addr = fetch_debug_register (pid, 2 * idx);
+ *dbr_addr = fetch_debug_register (ptid, 2 * idx);
if (dbr_mask)
- *dbr_mask = fetch_debug_register (pid, 2 * idx + 1);
+ *dbr_mask = fetch_debug_register (ptid, 2 * idx + 1);
}
static void
-store_debug_register_pair (int pid, int idx, long *dbr_addr, long *dbr_mask)
+store_debug_register_pair (ptid_t ptid, int idx, long *dbr_addr, long *dbr_mask)
{
if (dbr_addr)
- store_debug_register (pid, 2 * idx, *dbr_addr);
+ store_debug_register (ptid, 2 * idx, *dbr_addr);
if (dbr_mask)
- store_debug_register (pid, 2 * idx + 1, *dbr_mask);
+ store_debug_register (ptid, 2 * idx + 1, *dbr_mask);
}
static int
return onecount <= 1;
}
-int
-ia64_linux_insert_watchpoint (int pid, CORE_ADDR addr, int len, int rw)
+static int
+ia64_linux_insert_watchpoint (CORE_ADDR addr, int len, int rw)
{
+ 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 (pid, idx, NULL, &dbr_mask);
+ fetch_debug_register_pair (ptid, idx, NULL, &dbr_mask);
if ((dbr_mask & (0x3UL << 62)) == 0)
{
/* Exit loop if both r and w bits clear */
return -1;
}
- store_debug_register_pair (pid, idx, &dbr_addr, &dbr_mask);
- enable_watchpoints_in_psr (pid);
+ store_debug_register_pair (ptid, idx, &dbr_addr, &dbr_mask);
+ enable_watchpoints_in_psr (get_current_regcache ());
return 0;
}
-int
-ia64_linux_remove_watchpoint (int pid, CORE_ADDR addr, int len)
+static int
+ia64_linux_remove_watchpoint (CORE_ADDR addr, int len, int type)
{
+ 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 (pid, idx, &dbr_addr, &dbr_mask);
+ fetch_debug_register_pair (ptid, idx, &dbr_addr, &dbr_mask);
if ((dbr_mask & (0x3UL << 62)) && addr == (CORE_ADDR) dbr_addr)
{
dbr_addr = 0;
dbr_mask = 0;
- store_debug_register_pair (pid, idx, &dbr_addr, &dbr_mask);
+ store_debug_register_pair (ptid, idx, &dbr_addr, &dbr_mask);
return 0;
}
}
return -1;
}
-CORE_ADDR
-ia64_linux_stopped_by_watchpoint (int pid)
+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 regcache *regcache = get_current_regcache ();
- tid = TIDGET(pid);
+ tid = TIDGET(ptid);
if (tid == 0)
- tid = pid;
+ tid = PIDGET (ptid);
errno = 0;
- ptrace (PTRACE_GETSIGINFO, tid, (PTRACE_ARG3_TYPE) 0, &siginfo);
+ ptrace (PTRACE_GETSIGINFO, tid, (PTRACE_TYPE_ARG3) 0, &siginfo);
- if (errno != 0 || siginfo.si_code != 4 /* TRAP_HWBKPT */)
+ if (errno != 0 || siginfo.si_signo != SIGTRAP ||
+ (siginfo.si_code & 0xffff) != 0x0004 /* TRAP_HWBKPT */)
return 0;
- psr = read_register_pid (IA64_PSR_REGNUM, pid);
+ 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, pid);
+ regcache_cooked_write_unsigned (regcache, IA64_PSR_REGNUM, psr);
+
+ *addr_p = (CORE_ADDR)siginfo.si_addr;
+ return 1;
+}
+
+static int
+ia64_linux_stopped_by_watchpoint (void)
+{
+ CORE_ADDR addr;
+ return ia64_linux_stopped_data_address (¤t_target, &addr);
+}
+
+static int
+ia64_linux_can_use_hw_breakpoint (int type, int cnt, int othertype)
+{
+ return 1;
+}
+
+
+/* Fetch register REGNUM from the inferior. */
+
+static void
+ia64_linux_fetch_register (struct regcache *regcache, int regnum)
+{
+ CORE_ADDR addr;
+ size_t size;
+ PTRACE_TYPE_RET *buf;
+ int pid, i;
+
+ if (ia64_cannot_fetch_register (regnum))
+ {
+ regcache_raw_supply (regcache, regnum, NULL);
+ return;
+ }
+
+ /* Cater for systems like GNU/Linux, that implement threads as
+ separate processes. */
+ pid = ptid_get_lwp (inferior_ptid);
+ if (pid == 0)
+ 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);
+
+ gdb_assert ((size % sizeof (PTRACE_TYPE_RET)) == 0);
+ buf = alloca (size);
+
+ /* Read the register contents from the inferior a chunk at a time. */
+ for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
+ {
+ errno = 0;
+ buf[i] = ptrace (PT_READ_U, pid, (PTRACE_TYPE_ARG3)addr, 0);
+ if (errno != 0)
+ error (_("Couldn't read register %s (#%d): %s."),
+ gdbarch_register_name (current_gdbarch, regnum),
+ regnum, safe_strerror (errno));
+
+ addr += sizeof (PTRACE_TYPE_RET);
+ }
+ 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 (struct regcache *regcache, int regnum)
+{
+ if (regnum == -1)
+ for (regnum = 0; regnum < gdbarch_num_regs (current_gdbarch); regnum++)
+ ia64_linux_fetch_register (regcache, regnum);
+ else
+ ia64_linux_fetch_register (regcache, regnum);
+}
+
+/* Store register REGNUM into the inferior. */
+
+static void
+ia64_linux_store_register (const struct regcache *regcache, int regnum)
+{
+ CORE_ADDR addr;
+ size_t size;
+ PTRACE_TYPE_RET *buf;
+ int pid, i;
+
+ if (ia64_cannot_store_register (regnum))
+ return;
+
+ /* Cater for systems like GNU/Linux, that implement threads as
+ separate processes. */
+ pid = ptid_get_lwp (inferior_ptid);
+ if (pid == 0)
+ 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);
+
+ 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 (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."),
+ gdbarch_register_name (current_gdbarch, regnum),
+ regnum, safe_strerror (errno));
+
+ addr += sizeof (PTRACE_TYPE_RET);
+ }
+}
+
+/* Store register REGNUM back into the inferior. If REGNUM is -1, do
+ this for all registers. */
+
+static void
+ia64_linux_store_registers (struct regcache *regcache, int regnum)
+{
+ if (regnum == -1)
+ for (regnum = 0; regnum < gdbarch_num_regs (current_gdbarch); regnum++)
+ ia64_linux_store_register (regcache, regnum);
+ else
+ ia64_linux_store_register (regcache, regnum);
+}
+
+
+static LONGEST (*super_xfer_partial) (struct target_ops *, enum target_object,
+ const char *, gdb_byte *, const gdb_byte *,
+ ULONGEST, LONGEST);
+
+static LONGEST
+ia64_linux_xfer_partial (struct target_ops *ops,
+ enum target_object object,
+ const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ if (object == TARGET_OBJECT_UNWIND_TABLE && writebuf == NULL && offset == 0)
+ return syscall (__NR_getunwind, readbuf, len);
+
+ return super_xfer_partial (ops, object, annex, readbuf, writebuf,
+ offset, len);
+}
+
+void _initialize_ia64_linux_nat (void);
+
+void
+_initialize_ia64_linux_nat (void)
+{
+ struct target_ops *t = linux_target ();
+
+ /* Fill in the generic GNU/Linux methods. */
+ t = linux_target ();
+
+ /* Override the default fetch/store register routines. */
+ t->to_fetch_registers = ia64_linux_fetch_registers;
+ t->to_store_registers = ia64_linux_store_registers;
+
+ /* Override the default to_xfer_partial. */
+ super_xfer_partial = t->to_xfer_partial;
+ t->to_xfer_partial = ia64_linux_xfer_partial;
+
+ /* Override watchpoint routines. */
+
+ /* The IA-64 architecture can step over a watch point (without triggering
+ it again) if the "dd" (data debug fault disable) bit in the processor
+ status word is set.
+
+ This PSR bit is set in ia64_linux_stopped_by_watchpoint when the
+ code there has determined that a hardware watchpoint has indeed
+ been hit. The CPU will then be able to execute one instruction
+ without triggering a watchpoint. */
+
+ t->to_have_steppable_watchpoint = 1;
+ t->to_can_use_hw_breakpoint = ia64_linux_can_use_hw_breakpoint;
+ t->to_stopped_by_watchpoint = ia64_linux_stopped_by_watchpoint;
+ t->to_stopped_data_address = ia64_linux_stopped_data_address;
+ t->to_insert_watchpoint = ia64_linux_insert_watchpoint;
+ t->to_remove_watchpoint = ia64_linux_remove_watchpoint;
- return (CORE_ADDR) siginfo.si_addr;
+ /* Register the target. */
+ linux_nat_add_target (t);
}
projects / deliverable / binutils-gdb.git / blobdiff