/* Auxiliary vector support for GDB, the GNU debugger.
- Copyright (C) 2004-2019 Free Software Foundation, Inc.
+ Copyright (C) 2004-2022 Free Software Foundation, Inc.
This file is part of GDB.
#include "valprint.h"
#include "gdbcore.h"
#include "observable.h"
-#include "common/filestuff.h"
+#include "gdbsupport/filestuff.h"
#include "objfiles.h"
#include "auxv.h"
ULONGEST len,
ULONGEST *xfered_len)
{
- int fd;
ssize_t l;
std::string pathname = string_printf ("/proc/%d/auxv", inferior_ptid.pid ());
- fd = gdb_open_cloexec (pathname, writebuf != NULL ? O_WRONLY : O_RDONLY, 0);
- if (fd < 0)
+ scoped_fd fd
+ = gdb_open_cloexec (pathname, writebuf != NULL ? O_WRONLY : O_RDONLY, 0);
+ if (fd.get () < 0)
return TARGET_XFER_E_IO;
if (offset != (ULONGEST) 0
- && lseek (fd, (off_t) offset, SEEK_SET) != (off_t) offset)
+ && lseek (fd.get (), (off_t) offset, SEEK_SET) != (off_t) offset)
l = -1;
else if (readbuf != NULL)
- l = read (fd, readbuf, (size_t) len);
+ l = read (fd.get (), readbuf, (size_t) len);
else
- l = write (fd, writebuf, (size_t) len);
-
- (void) close (fd);
+ l = write (fd.get (), writebuf, (size_t) len);
if (l < 0)
return TARGET_XFER_E_IO;
len -= block;
/* Check terminal AT_NULL. This function is being called
- indefinitely being extended its READBUF until it returns EOF
- (0). */
+ indefinitely being extended its READBUF until it returns EOF
+ (0). */
while (block >= auxv_pair_size)
{
return procfs_xfer_auxv (readbuf, writebuf, offset, len, xfered_len);
}
-/* 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. */
-int
-default_auxv_parse (struct target_ops *ops, gdb_byte **readptr,
- gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp)
+/* This function compared to other auxv_parse functions: it takes the size of
+ the auxv type field as a parameter. */
+
+static int
+generic_auxv_parse (struct gdbarch *gdbarch, gdb_byte **readptr,
+ gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp,
+ int sizeof_auxv_type)
{
- const int sizeof_auxv_field = gdbarch_ptr_bit (target_gdbarch ())
- / TARGET_CHAR_BIT;
- const enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
+ struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
+ const int sizeof_auxv_val = TYPE_LENGTH (ptr_type);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
gdb_byte *ptr = *readptr;
if (endptr == ptr)
return 0;
- if (endptr - ptr < sizeof_auxv_field * 2)
+ if (endptr - ptr < 2 * sizeof_auxv_val)
return -1;
- *typep = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order);
- ptr += sizeof_auxv_field;
- *valp = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order);
- ptr += sizeof_auxv_field;
+ *typep = extract_unsigned_integer (ptr, sizeof_auxv_type, byte_order);
+ /* Even if the auxv type takes less space than an auxv value, there is
+ padding after the type such that the value is aligned on a multiple of
+ its size (and this is why we advance by `sizeof_auxv_val` and not
+ `sizeof_auxv_type`). */
+ ptr += sizeof_auxv_val;
+ *valp = extract_unsigned_integer (ptr, sizeof_auxv_val, byte_order);
+ ptr += sizeof_auxv_val;
*readptr = ptr;
return 1;
}
+/* See auxv.h. */
+
+int
+default_auxv_parse (struct target_ops *ops, gdb_byte **readptr,
+ gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp)
+{
+ struct gdbarch *gdbarch = target_gdbarch ();
+ struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
+ const int sizeof_auxv_type = TYPE_LENGTH (ptr_type);
+
+ return generic_auxv_parse (gdbarch, readptr, endptr, typep, valp,
+ sizeof_auxv_type);
+}
+
+/* See auxv.h. */
+
+int
+svr4_auxv_parse (struct gdbarch *gdbarch, gdb_byte **readptr,
+ gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp)
+{
+ struct type *int_type = builtin_type (gdbarch)->builtin_int;
+ const int sizeof_auxv_type = TYPE_LENGTH (int_type);
+
+ return generic_auxv_parse (gdbarch, readptr, endptr, typep, valp,
+ sizeof_auxv_type);
+}
+
/* 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.
if (gdbarch_auxv_parse_p (gdbarch))
return gdbarch_auxv_parse (gdbarch, readptr, endptr, typep, valp);
- return current_top_target ()->auxv_parse (readptr, endptr, typep, valp);
+ return current_inferior ()->top_target ()->auxv_parse (readptr, endptr,
+ typep, valp);
}
AUXV_FORMAT_HEX);
TAG (AT_L1I_CACHESHAPE, _("L1 Instruction cache information"),
AUXV_FORMAT_HEX);
+ TAG (AT_L1I_CACHESIZE, _("L1 Instruction cache size"), AUXV_FORMAT_HEX);
+ TAG (AT_L1I_CACHEGEOMETRY, _("L1 Instruction cache geometry"),
+ AUXV_FORMAT_HEX);
TAG (AT_L1D_CACHESHAPE, _("L1 Data cache information"), AUXV_FORMAT_HEX);
+ TAG (AT_L1D_CACHESIZE, _("L1 Data cache size"), AUXV_FORMAT_HEX);
+ TAG (AT_L1D_CACHEGEOMETRY, _("L1 Data cache geometry"),
+ AUXV_FORMAT_HEX);
TAG (AT_L2_CACHESHAPE, _("L2 cache information"), AUXV_FORMAT_HEX);
+ TAG (AT_L2_CACHESIZE, _("L2 cache size"), AUXV_FORMAT_HEX);
+ TAG (AT_L2_CACHEGEOMETRY, _("L2 cache geometry"), AUXV_FORMAT_HEX);
TAG (AT_L3_CACHESHAPE, _("L3 cache information"), AUXV_FORMAT_HEX);
+ TAG (AT_L3_CACHESIZE, _("L3 cache size"), AUXV_FORMAT_HEX);
+ TAG (AT_L3_CACHEGEOMETRY, _("L3 cache geometry"), AUXV_FORMAT_HEX);
+ TAG (AT_MINSIGSTKSZ, _("Minimum stack size for signal delivery"),
+ AUXV_FORMAT_HEX);
TAG (AT_SUN_UID, _("Effective user ID"), AUXV_FORMAT_DEC);
TAG (AT_SUN_RUID, _("Real user ID"), AUXV_FORMAT_DEC);
TAG (AT_SUN_GID, _("Effective group ID"), AUXV_FORMAT_DEC);
static void
info_auxv_command (const char *cmd, int from_tty)
{
- if (! target_has_stack)
+ if (! target_has_stack ())
error (_("The program has no auxiliary information now."));
else
{
- int ents = fprint_target_auxv (gdb_stdout, current_top_target ());
+ int ents = fprint_target_auxv (gdb_stdout,
+ current_inferior ()->top_target ());
if (ents < 0)
error (_("No auxiliary vector found, or failed reading it."));
}
}
+void _initialize_auxv ();
void
-_initialize_auxv (void)
+_initialize_auxv ()
{
add_info ("auxv", info_auxv_command,
_("Display the inferior's auxiliary vector.\n\
This is information provided by the operating system at program startup."));
/* Observers used to invalidate the auxv cache when needed. */
- gdb::observers::inferior_exit.attach (invalidate_auxv_cache_inf);
- gdb::observers::inferior_appeared.attach (invalidate_auxv_cache_inf);
- gdb::observers::executable_changed.attach (invalidate_auxv_cache);
+ gdb::observers::inferior_exit.attach (invalidate_auxv_cache_inf, "auxv");
+ gdb::observers::inferior_appeared.attach (invalidate_auxv_cache_inf, "auxv");
+ gdb::observers::executable_changed.attach (invalidate_auxv_cache, "auxv");
}
projects / binutils-gdb.git / blobdiff