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2011-12-27 Mark Kettenis <kettenis@gnu.org> 

* inf-ptrace.c [PT_IO && PIOD_READ_AUXV]
       (inf_ptrace_xfer_partial): Implement TARGET_OBJECT_AUXV.
       (inf_ptrace_auxv_parse): New function.
       (inf_ptrace_target): Initialize to_auxv_parse field.
This commit is contained in:
Mark Kettenis 2011-12-27 21:36:40 +00:00
parent 3bc96cfbb2
commit e8ace1c0f4
2 changed files with 65 additions and 0 deletions
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7
gdb/ChangeLog
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@ -1,3 +1,10 @@
2011-12-27 Mark Kettenis <kettenis@gnu.org>
* inf-ptrace.c [PT_IO && PIOD_READ_AUXV]
(inf_ptrace_xfer_partial): Implement TARGET_OBJECT_AUXV.
(inf_ptrace_auxv_parse): New function.
(inf_ptrace_target): Initialize to_auxv_parse field.
2011-12-27 Joel Brobecker <brobecker@adacore.com>
* ada-lang.c (should_use_wild_match): New function.

58
gdb/inf-ptrace.c
View File

@ -582,6 +582,26 @@ inf_ptrace_xfer_partial (struct target_ops *ops, enum target_object object,
return -1;
case TARGET_OBJECT_AUXV:
#if defined (PT_IO) && defined (PIOD_READ_AUXV)
/* OpenBSD 4.5 has a new PIOD_READ_AUXV operation for the PT_IO
request that allows us to read the auxilliary vector. Other
BSD's may follow if they feel the need to support PIE. */
{
struct ptrace_io_desc piod;
if (writebuf)
return -1;
piod.piod_op = PIOD_READ_AUXV;
piod.piod_addr = readbuf;
piod.piod_offs = (void *) (long) offset;
piod.piod_len = len;
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;
}
#endif
return -1;
case TARGET_OBJECT_WCOOKIE:
@ -619,6 +639,41 @@ inf_ptrace_pid_to_str (struct target_ops *ops, ptid_t ptid)
return normal_pid_to_str (ptid);
}
#if defined (PT_IO) && defined (PIOD_READ_AUXV)
/* Read one auxv entry from *READPTR, not reading locations >= ENDPTR.
Return 0 if *READPTR is already at the end of the buffer.
Return -1 if there is insufficient buffer for a whole entry.
Return 1 if an entry was read into *TYPEP and *VALP. */
static int
inf_ptrace_auxv_parse (struct target_ops *ops, gdb_byte **readptr,
gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp)
{
struct type *int_type = builtin_type (target_gdbarch)->builtin_int;
struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr;
const int sizeof_auxv_type = TYPE_LENGTH (int_type);
const int sizeof_auxv_val = TYPE_LENGTH (ptr_type);
enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
gdb_byte *ptr = *readptr;
if (endptr == ptr)
return 0;
if (endptr - ptr < 2 * sizeof_auxv_val)
return -1;
*typep = extract_unsigned_integer (ptr, sizeof_auxv_type, byte_order);
ptr += sizeof_auxv_val; /* Alignment. */
*valp = extract_unsigned_integer (ptr, sizeof_auxv_val, byte_order);
ptr += sizeof_auxv_val;
*readptr = ptr;
return 1;
}
#endif
/* Create a prototype ptrace target. The client can override it with
local methods. */
@ -644,6 +699,9 @@ inf_ptrace_target (void)
t->to_pid_to_str = inf_ptrace_pid_to_str;
t->to_stop = inf_ptrace_stop;
t->to_xfer_partial = inf_ptrace_xfer_partial;
#if defined (PT_IO) && defined (PIOD_READ_AUXV)
t->to_auxv_parse = inf_ptrace_auxv_parse;
#endif
return t;
}