/* Low-level child interface to ptrace.
- Copyright (C) 1988-2013 Free Software Foundation, Inc.
+ Copyright (C) 1988-2014 Free Software Foundation, Inc.
This file is part of GDB.
#include "terminal.h"
#include "gdbcore.h"
#include "regcache.h"
-
-#include "gdb_assert.h"
-#include <string.h>
#include "gdb_ptrace.h"
#include "gdb_wait.h"
#include <signal.h>
#ifdef PT_GET_PROCESS_STATE
static void
-inf_ptrace_post_startup_inferior (ptid_t pid)
+inf_ptrace_post_startup_inferior (struct target_ops *self, ptid_t pid)
{
ptrace_event_t pe;
only report its exit status to its original parent. */
waitpid (ptid_get_pid (inferior_ptid), &status, 0);
- generic_mourn_inferior ();
-
- if (!have_inferiors ())
- unpush_target (ops);
+ inf_child_mourn_inferior (ops);
}
/* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
be chatty about it. */
static void
-inf_ptrace_attach (struct target_ops *ops, char *args, int from_tty)
+inf_ptrace_attach (struct target_ops *ops, const char *args, int from_tty)
{
char *exec_file;
pid_t pid;
#ifdef PT_GET_PROCESS_STATE
static void
-inf_ptrace_post_attach (int pid)
+inf_ptrace_post_attach (struct target_ops *self, int pid)
{
ptrace_event_t pe;
inferior_ptid = null_ptid;
detach_inferior (pid);
- if (!have_inferiors ())
- unpush_target (ops);
+ inf_child_maybe_unpush_target (ops);
}
/* Kill the inferior. */
/* Stop the inferior. */
static void
-inf_ptrace_stop (ptid_t ptid)
+inf_ptrace_stop (struct target_ops *self, ptid_t ptid)
{
/* Send a SIGINT to the process group. This acts just like the user
typed a ^C on the controlling terminal. Note that using a
return pid_to_ptid (pid);
}
-/* Attempt a transfer all LEN bytes starting at OFFSET between the
- inferior's OBJECT:ANNEX space and GDB's READBUF/WRITEBUF buffer.
- Return the number of bytes actually transferred. */
+/* Implement the to_xfer_partial target_ops method. */
-static LONGEST
+static enum target_xfer_status
inf_ptrace_xfer_partial (struct target_ops *ops, enum target_object object,
const char *annex, gdb_byte *readbuf,
const gdb_byte *writebuf,
- ULONGEST offset, LONGEST len)
+ ULONGEST offset, ULONGEST len, ULONGEST *xfered_len)
{
pid_t pid = ptid_get_pid (inferior_ptid);
errno = 0;
if (ptrace (PT_IO, pid, (caddr_t)&piod, 0) == 0)
- /* Return the actual number of bytes read or written. */
- return piod.piod_len;
+ {
+ /* Return the actual number of bytes read or written. */
+ *xfered_len = piod.piod_len;
+ return (piod.piod_len == 0) ? TARGET_XFER_EOF : TARGET_XFER_OK;
+ }
/* If the PT_IO request is somehow not supported, fallback on
using PT_WRITE_D/PT_READ_D. Otherwise we will return zero
to indicate failure. */
if (errno != EINVAL)
- return 0;
+ return TARGET_XFER_EOF;
}
#endif
{
gdb_byte byte[sizeof (PTRACE_TYPE_RET)];
} buffer;
ULONGEST rounded_offset;
- LONGEST partial_len;
+ ULONGEST partial_len;
/* Round the start offset down to the next long word
boundary. */
(PTRACE_TYPE_ARG3)(uintptr_t)rounded_offset,
buffer.word);
if (errno)
- return 0;
+ return TARGET_XFER_EOF;
}
}
(PTRACE_TYPE_ARG3)(uintptr_t)rounded_offset,
0);
if (errno)
- return 0;
+ return TARGET_XFER_EOF;
/* Copy appropriate bytes out of the buffer. */
memcpy (readbuf, buffer.byte + (offset - rounded_offset),
partial_len);
}
- return partial_len;
+ *xfered_len = partial_len;
+ return TARGET_XFER_OK;
}
case TARGET_OBJECT_UNWIND_TABLE:
- return -1;
+ return TARGET_XFER_E_IO;
case TARGET_OBJECT_AUXV:
#if defined (PT_IO) && defined (PIOD_READ_AUXV)
struct ptrace_io_desc piod;
if (writebuf)
- return -1;
+ return TARGET_XFER_E_IO;
piod.piod_op = PIOD_READ_AUXV;
piod.piod_addr = readbuf;
piod.piod_offs = (void *) (long) offset;
errno = 0;
if (ptrace (PT_IO, pid, (caddr_t)&piod, 0) == 0)
- /* Return the actual number of bytes read or written. */
- return piod.piod_len;
+ {
+ /* Return the actual number of bytes read or written. */
+ *xfered_len = piod.piod_len;
+ return (piod.piod_len == 0) ? TARGET_XFER_EOF : TARGET_XFER_OK;
+ }
}
#endif
- return -1;
+ return TARGET_XFER_E_IO;
case TARGET_OBJECT_WCOOKIE:
- return -1;
+ return TARGET_XFER_E_IO;
default:
- return -1;
+ return TARGET_XFER_E_IO;
}
}