/* Auxiliary vector support for GDB, the GNU debugger.
- Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010
- Free Software Foundation, Inc.
+ Copyright (C) 2004-2020 Free Software Foundation, Inc.
This file is part of GDB.
#include "command.h"
#include "inferior.h"
#include "valprint.h"
-#include "gdb_assert.h"
#include "gdbcore.h"
+#include "observable.h"
+#include "gdbsupport/filestuff.h"
+#include "objfiles.h"
#include "auxv.h"
#include "elf/common.h"
#include <fcntl.h>
-/* This function handles access via /proc/PID/auxv, which is a common method
- for native targets. */
+/* Implement the to_xfer_partial target_ops method. This function
+ handles access via /proc/PID/auxv, which is a common method for
+ native targets. */
-static LONGEST
+static enum target_xfer_status
procfs_xfer_auxv (gdb_byte *readbuf,
const gdb_byte *writebuf,
ULONGEST offset,
- LONGEST len)
+ ULONGEST len,
+ ULONGEST *xfered_len)
{
- char *pathname;
int fd;
- LONGEST n;
+ ssize_t l;
- pathname = xstrprintf ("/proc/%d/auxv", PIDGET (inferior_ptid));
- fd = open (pathname, writebuf != NULL ? O_WRONLY : O_RDONLY);
- xfree (pathname);
+ 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)
- return -1;
+ return TARGET_XFER_E_IO;
if (offset != (ULONGEST) 0
&& lseek (fd, (off_t) offset, SEEK_SET) != (off_t) offset)
- n = -1;
+ l = -1;
else if (readbuf != NULL)
- n = read (fd, readbuf, len);
+ l = read (fd, readbuf, (size_t) len);
else
- n = write (fd, writebuf, len);
+ l = write (fd, writebuf, (size_t) len);
(void) close (fd);
- return n;
+ if (l < 0)
+ return TARGET_XFER_E_IO;
+ else if (l == 0)
+ return TARGET_XFER_EOF;
+ else
+ {
+ *xfered_len = (ULONGEST) l;
+ return TARGET_XFER_OK;
+ }
}
/* This function handles access via ld.so's symbol `_dl_auxv'. */
-static LONGEST
+static enum target_xfer_status
ld_so_xfer_auxv (gdb_byte *readbuf,
const gdb_byte *writebuf,
ULONGEST offset,
- LONGEST len)
+ ULONGEST len, ULONGEST *xfered_len)
{
- struct minimal_symbol *msym;
+ struct bound_minimal_symbol msym;
CORE_ADDR data_address, pointer_address;
- struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr;
+ struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr;
size_t ptr_size = TYPE_LENGTH (ptr_type);
size_t auxv_pair_size = 2 * ptr_size;
- gdb_byte *ptr_buf = alloca (ptr_size);
+ gdb_byte *ptr_buf = (gdb_byte *) alloca (ptr_size);
LONGEST retval;
size_t block;
msym = lookup_minimal_symbol ("_dl_auxv", NULL, NULL);
- if (msym == NULL)
- return -1;
+ if (msym.minsym == NULL)
+ return TARGET_XFER_E_IO;
- if (MSYMBOL_SIZE (msym) != ptr_size)
- return -1;
+ if (MSYMBOL_SIZE (msym.minsym) != ptr_size)
+ return TARGET_XFER_E_IO;
- /* POINTER_ADDRESS is a location where the `_dl_auxv' variable resides.
- DATA_ADDRESS is the inferior value present in `_dl_auxv', therefore the
- real inferior AUXV address. */
+ /* POINTER_ADDRESS is a location where the `_dl_auxv' variable
+ resides. DATA_ADDRESS is the inferior value present in
+ `_dl_auxv', therefore the real inferior AUXV address. */
- pointer_address = SYMBOL_VALUE_ADDRESS (msym);
+ pointer_address = BMSYMBOL_VALUE_ADDRESS (msym);
/* The location of the _dl_auxv symbol may no longer be correct if
- ld.so runs at a different address than the one present in the file.
- This is very common case - for unprelinked ld.so or with a PIE executable.
- PIE executable forces random address even for libraries already being
- prelinked to some address. PIE executables themselves are never prelinked
- even on prelinked systems. Prelinking of a PIE executable would block
- their purpose of randomizing load of everything including the executable.
-
- If the memory read fails, return -1 to fallback on another mechanism for
- retrieving the AUXV.
-
- In most cases of a PIE running under valgrind there is no way to find
- out the base addresses of any of ld.so, executable or AUXV as everything
- is randomized and /proc information is not relevant for the virtual
- executable running under valgrind. We think that we might need a valgrind
- extension to make it work. This is PR 11440. */
+ ld.so runs at a different address than the one present in the
+ file. This is very common case - for unprelinked ld.so or with a
+ PIE executable. PIE executable forces random address even for
+ libraries already being prelinked to some address. PIE
+ executables themselves are never prelinked even on prelinked
+ systems. Prelinking of a PIE executable would block their
+ purpose of randomizing load of everything including the
+ executable.
+
+ If the memory read fails, return -1 to fallback on another
+ mechanism for retrieving the AUXV.
+
+ In most cases of a PIE running under valgrind there is no way to
+ find out the base addresses of any of ld.so, executable or AUXV
+ as everything is randomized and /proc information is not relevant
+ for the virtual executable running under valgrind. We think that
+ we might need a valgrind extension to make it work. This is PR
+ 11440. */
if (target_read_memory (pointer_address, ptr_buf, ptr_size) != 0)
- return -1;
+ return TARGET_XFER_E_IO;
data_address = extract_typed_address (ptr_buf, ptr_type);
- /* Possibly still not initialized such as during an inferior startup. */
+ /* Possibly still not initialized such as during an inferior
+ startup. */
if (data_address == 0)
- return -1;
+ return TARGET_XFER_E_IO;
data_address += offset;
if (writebuf != NULL)
{
if (target_write_memory (data_address, writebuf, len) == 0)
- return len;
+ {
+ *xfered_len = (ULONGEST) len;
+ return TARGET_XFER_OK;
+ }
else
- return -1;
+ return TARGET_XFER_E_IO;
}
- /* Stop if trying to read past the existing AUXV block. The final AT_NULL
- was already returned before. */
+ /* Stop if trying to read past the existing AUXV block. The final
+ AT_NULL was already returned before. */
if (offset >= auxv_pair_size)
{
if (target_read_memory (data_address - auxv_pair_size, ptr_buf,
ptr_size) != 0)
- return -1;
+ return TARGET_XFER_E_IO;
if (extract_typed_address (ptr_buf, ptr_type) == AT_NULL)
- return 0;
+ return TARGET_XFER_EOF;
}
retval = 0;
if (block > len)
block = len;
- /* Reading sizes smaller than AUXV_PAIR_SIZE is not supported. Tails
- unaligned to AUXV_PAIR_SIZE will not be read during a call (they
- should be completed during next read with new/extended buffer). */
+ /* Reading sizes smaller than AUXV_PAIR_SIZE is not supported.
+ Tails unaligned to AUXV_PAIR_SIZE will not be read during a
+ call (they should be completed during next read with
+ new/extended buffer). */
block &= -auxv_pair_size;
if (block == 0)
- return retval;
+ break;
if (target_read_memory (data_address, readbuf, block) != 0)
{
if (block <= auxv_pair_size)
- return retval;
+ break;
block = auxv_pair_size;
continue;
data_address += block;
len -= block;
- /* Check terminal AT_NULL. This function is being called indefinitely
- being extended its READBUF until it returns EOF (0). */
+ /* Check terminal AT_NULL. This function is being called
+ indefinitely being extended its READBUF until it returns EOF
+ (0). */
while (block >= auxv_pair_size)
{
retval += auxv_pair_size;
if (extract_typed_address (readbuf, ptr_type) == AT_NULL)
- return retval;
+ {
+ *xfered_len = (ULONGEST) retval;
+ return TARGET_XFER_OK;
+ }
readbuf += auxv_pair_size;
block -= auxv_pair_size;
}
}
- return retval;
+ *xfered_len = (ULONGEST) retval;
+ return TARGET_XFER_OK;
}
-/* This function is called like a to_xfer_partial hook, but must be
- called with TARGET_OBJECT_AUXV. It handles access to AUXV. */
+/* Implement the to_xfer_partial target_ops method for
+ TARGET_OBJECT_AUXV. It handles access to AUXV. */
-LONGEST
+enum target_xfer_status
memory_xfer_auxv (struct target_ops *ops,
enum target_object object,
const char *annex,
gdb_byte *readbuf,
const gdb_byte *writebuf,
ULONGEST offset,
- LONGEST len)
+ ULONGEST len, ULONGEST *xfered_len)
{
gdb_assert (object == TARGET_OBJECT_AUXV);
gdb_assert (readbuf || writebuf);
- /* ld_so_xfer_auxv is the only function safe for virtual executables being
- executed by valgrind's memcheck. Using ld_so_xfer_auxv during inferior
- startup is problematic, because ld.so symbol tables have not yet been
- relocated. So GDB uses this function only when attaching to a process.
+ /* ld_so_xfer_auxv is the only function safe for virtual
+ executables being executed by valgrind's memcheck. Using
+ ld_so_xfer_auxv during inferior startup is problematic, because
+ ld.so symbol tables have not yet been relocated. So GDB uses
+ this function only when attaching to a process.
*/
if (current_inferior ()->attach_flag != 0)
{
- LONGEST retval;
+ enum target_xfer_status ret;
- retval = ld_so_xfer_auxv (readbuf, writebuf, offset, len);
- if (retval != -1)
- return retval;
+ ret = ld_so_xfer_auxv (readbuf, writebuf, offset, len, xfered_len);
+ if (ret != TARGET_XFER_E_IO)
+ return ret;
}
- return procfs_xfer_auxv (readbuf, writebuf, offset, len);
+ 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. */
+/* This function compared to other auxv_parse functions: it takes the size of
+ the auxv type field as a parameter. */
+
static int
-default_auxv_parse (struct target_ops *ops, gdb_byte **readptr,
- gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp)
+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.
Return 1 if an entry was read into *TYPEP and *VALP. */
int
-target_auxv_parse (struct target_ops *ops, gdb_byte **readptr,
- gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp)
+target_auxv_parse (gdb_byte **readptr,
+ gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp)
{
- struct target_ops *t;
+ struct gdbarch *gdbarch = target_gdbarch();
+
+ 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);
+}
- for (t = ops; t != NULL; t = t->beneath)
- if (t->to_auxv_parse != NULL)
- return t->to_auxv_parse (t, readptr, endptr, typep, valp);
-
- return default_auxv_parse (ops, readptr, endptr, typep, valp);
+
+/* Auxiliary Vector information structure. This is used by GDB
+ for caching purposes for each inferior. This helps reduce the
+ overhead of transfering data from a remote target to the local host. */
+struct auxv_info
+{
+ gdb::optional<gdb::byte_vector> data;
+};
+
+/* Per-inferior data key for auxv. */
+static const struct inferior_key<auxv_info> auxv_inferior_data;
+
+/* Invalidate INF's auxv cache. */
+
+static void
+invalidate_auxv_cache_inf (struct inferior *inf)
+{
+ auxv_inferior_data.clear (inf);
+}
+
+/* Invalidate current inferior's auxv cache. */
+
+static void
+invalidate_auxv_cache (void)
+{
+ invalidate_auxv_cache_inf (current_inferior ());
+}
+
+/* Fetch the auxv object from inferior INF. If auxv is cached already,
+ return a pointer to the cache. If not, fetch the auxv object from the
+ target and cache it. This function always returns a valid INFO pointer. */
+
+static struct auxv_info *
+get_auxv_inferior_data (struct target_ops *ops)
+{
+ struct auxv_info *info;
+ struct inferior *inf = current_inferior ();
+
+ info = auxv_inferior_data.get (inf);
+ if (info == NULL)
+ {
+ info = auxv_inferior_data.emplace (inf);
+ info->data = target_read_alloc (ops, TARGET_OBJECT_AUXV, NULL);
+ }
+
+ return info;
}
/* Extract the auxiliary vector entry with a_type matching MATCH.
target_auxv_search (struct target_ops *ops, CORE_ADDR match, CORE_ADDR *valp)
{
CORE_ADDR type, val;
- gdb_byte *data;
- LONGEST n = target_read_alloc (ops, TARGET_OBJECT_AUXV, NULL, &data);
- gdb_byte *ptr = data;
+ auxv_info *info = get_auxv_inferior_data (ops);
+
+ if (!info->data)
+ return -1;
- if (n <= 0)
- return n;
+ gdb_byte *data = info->data->data ();
+ gdb_byte *ptr = data;
+ size_t len = info->data->size ();
while (1)
- switch (target_auxv_parse (ops, &ptr, data + n, &type, &val))
+ switch (target_auxv_parse (&ptr, data + len, &type, &val))
{
case 1: /* Here's an entry, check it. */
if (type == match)
{
- xfree (data);
*valp = val;
return 1;
}
break;
case 0: /* End of the vector. */
- xfree (data);
return 0;
default: /* Bogosity. */
- xfree (data);
return -1;
}
}
-/* Print the contents of the target's AUXV on the specified file. */
+/* Print the description of a single AUXV entry on the specified file. */
+
+void
+fprint_auxv_entry (struct ui_file *file, const char *name,
+ const char *description, enum auxv_format format,
+ CORE_ADDR type, CORE_ADDR val)
+{
+ fprintf_filtered (file, ("%-4s %-20s %-30s "),
+ plongest (type), name, description);
+ switch (format)
+ {
+ case AUXV_FORMAT_DEC:
+ fprintf_filtered (file, ("%s\n"), plongest (val));
+ break;
+ case AUXV_FORMAT_HEX:
+ fprintf_filtered (file, ("%s\n"), paddress (target_gdbarch (), val));
+ break;
+ case AUXV_FORMAT_STR:
+ {
+ struct value_print_options opts;
+
+ get_user_print_options (&opts);
+ if (opts.addressprint)
+ fprintf_filtered (file, ("%s "), paddress (target_gdbarch (), val));
+ val_print_string (builtin_type (target_gdbarch ())->builtin_char,
+ NULL, val, -1, file, &opts);
+ fprintf_filtered (file, ("\n"));
+ }
+ break;
+ }
+}
+
+/* The default implementation of gdbarch_print_auxv_entry. */
+
+void
+default_print_auxv_entry (struct gdbarch *gdbarch, struct ui_file *file,
+ CORE_ADDR type, CORE_ADDR val)
+{
+ const char *name = "???";
+ const char *description = "";
+ enum auxv_format format = AUXV_FORMAT_HEX;
+
+ switch (type)
+ {
+#define TAG(tag, text, kind) \
+ case tag: name = #tag; description = text; format = kind; break
+ TAG (AT_NULL, _("End of vector"), AUXV_FORMAT_HEX);
+ TAG (AT_IGNORE, _("Entry should be ignored"), AUXV_FORMAT_HEX);
+ TAG (AT_EXECFD, _("File descriptor of program"), AUXV_FORMAT_DEC);
+ TAG (AT_PHDR, _("Program headers for program"), AUXV_FORMAT_HEX);
+ TAG (AT_PHENT, _("Size of program header entry"), AUXV_FORMAT_DEC);
+ TAG (AT_PHNUM, _("Number of program headers"), AUXV_FORMAT_DEC);
+ TAG (AT_PAGESZ, _("System page size"), AUXV_FORMAT_DEC);
+ TAG (AT_BASE, _("Base address of interpreter"), AUXV_FORMAT_HEX);
+ TAG (AT_FLAGS, _("Flags"), AUXV_FORMAT_HEX);
+ TAG (AT_ENTRY, _("Entry point of program"), AUXV_FORMAT_HEX);
+ TAG (AT_NOTELF, _("Program is not ELF"), AUXV_FORMAT_DEC);
+ TAG (AT_UID, _("Real user ID"), AUXV_FORMAT_DEC);
+ TAG (AT_EUID, _("Effective user ID"), AUXV_FORMAT_DEC);
+ TAG (AT_GID, _("Real group ID"), AUXV_FORMAT_DEC);
+ TAG (AT_EGID, _("Effective group ID"), AUXV_FORMAT_DEC);
+ TAG (AT_CLKTCK, _("Frequency of times()"), AUXV_FORMAT_DEC);
+ TAG (AT_PLATFORM, _("String identifying platform"), AUXV_FORMAT_STR);
+ TAG (AT_HWCAP, _("Machine-dependent CPU capability hints"),
+ AUXV_FORMAT_HEX);
+ TAG (AT_FPUCW, _("Used FPU control word"), AUXV_FORMAT_DEC);
+ TAG (AT_DCACHEBSIZE, _("Data cache block size"), AUXV_FORMAT_DEC);
+ TAG (AT_ICACHEBSIZE, _("Instruction cache block size"), AUXV_FORMAT_DEC);
+ TAG (AT_UCACHEBSIZE, _("Unified cache block size"), AUXV_FORMAT_DEC);
+ TAG (AT_IGNOREPPC, _("Entry should be ignored"), AUXV_FORMAT_DEC);
+ TAG (AT_BASE_PLATFORM, _("String identifying base platform"),
+ AUXV_FORMAT_STR);
+ TAG (AT_RANDOM, _("Address of 16 random bytes"), AUXV_FORMAT_HEX);
+ TAG (AT_HWCAP2, _("Extension of AT_HWCAP"), AUXV_FORMAT_HEX);
+ TAG (AT_EXECFN, _("File name of executable"), AUXV_FORMAT_STR);
+ TAG (AT_SECURE, _("Boolean, was exec setuid-like?"), AUXV_FORMAT_DEC);
+ TAG (AT_SYSINFO, _("Special system info/entry points"), AUXV_FORMAT_HEX);
+ TAG (AT_SYSINFO_EHDR, _("System-supplied DSO's ELF header"),
+ 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);
+ TAG (AT_SUN_RGID, _("Real group ID"), AUXV_FORMAT_DEC);
+ TAG (AT_SUN_LDELF, _("Dynamic linker's ELF header"), AUXV_FORMAT_HEX);
+ TAG (AT_SUN_LDSHDR, _("Dynamic linker's section headers"),
+ AUXV_FORMAT_HEX);
+ TAG (AT_SUN_LDNAME, _("String giving name of dynamic linker"),
+ AUXV_FORMAT_STR);
+ TAG (AT_SUN_LPAGESZ, _("Large pagesize"), AUXV_FORMAT_DEC);
+ TAG (AT_SUN_PLATFORM, _("Platform name string"), AUXV_FORMAT_STR);
+ TAG (AT_SUN_CAP_HW1, _("Machine-dependent CPU capability hints"),
+ AUXV_FORMAT_HEX);
+ TAG (AT_SUN_IFLUSH, _("Should flush icache?"), AUXV_FORMAT_DEC);
+ TAG (AT_SUN_CPU, _("CPU name string"), AUXV_FORMAT_STR);
+ TAG (AT_SUN_EMUL_ENTRY, _("COFF entry point address"), AUXV_FORMAT_HEX);
+ TAG (AT_SUN_EMUL_EXECFD, _("COFF executable file descriptor"),
+ AUXV_FORMAT_DEC);
+ TAG (AT_SUN_EXECNAME,
+ _("Canonicalized file name given to execve"), AUXV_FORMAT_STR);
+ TAG (AT_SUN_MMU, _("String for name of MMU module"), AUXV_FORMAT_STR);
+ TAG (AT_SUN_LDDATA, _("Dynamic linker's data segment address"),
+ AUXV_FORMAT_HEX);
+ TAG (AT_SUN_AUXFLAGS,
+ _("AF_SUN_ flags passed from the kernel"), AUXV_FORMAT_HEX);
+ TAG (AT_SUN_EMULATOR, _("Name of emulation binary for runtime linker"),
+ AUXV_FORMAT_STR);
+ TAG (AT_SUN_BRANDNAME, _("Name of brand library"), AUXV_FORMAT_STR);
+ TAG (AT_SUN_BRAND_AUX1, _("Aux vector for brand modules 1"),
+ AUXV_FORMAT_HEX);
+ TAG (AT_SUN_BRAND_AUX2, _("Aux vector for brand modules 2"),
+ AUXV_FORMAT_HEX);
+ TAG (AT_SUN_BRAND_AUX3, _("Aux vector for brand modules 3"),
+ AUXV_FORMAT_HEX);
+ TAG (AT_SUN_CAP_HW2, _("Machine-dependent CPU capability hints 2"),
+ AUXV_FORMAT_HEX);
+ }
+
+ fprint_auxv_entry (file, name, description, format, type, val);
+}
+
+/* Print the contents of the target's AUXV on the specified file. */
+
int
fprint_target_auxv (struct ui_file *file, struct target_ops *ops)
{
+ struct gdbarch *gdbarch = target_gdbarch ();
CORE_ADDR type, val;
- gdb_byte *data;
- LONGEST len = target_read_alloc (ops, TARGET_OBJECT_AUXV, NULL,
- &data);
- gdb_byte *ptr = data;
int ents = 0;
+ auxv_info *info = get_auxv_inferior_data (ops);
- if (len <= 0)
- return len;
-
- while (target_auxv_parse (ops, &ptr, data + len, &type, &val) > 0)
- {
- const char *name = "???";
- const char *description = "";
- enum { dec, hex, str } flavor = hex;
+ if (!info->data)
+ return -1;
- switch (type)
- {
-#define TAG(tag, text, kind) \
- case tag: name = #tag; description = text; flavor = kind; break
- TAG (AT_NULL, _("End of vector"), hex);
- TAG (AT_IGNORE, _("Entry should be ignored"), hex);
- TAG (AT_EXECFD, _("File descriptor of program"), dec);
- TAG (AT_PHDR, _("Program headers for program"), hex);
- TAG (AT_PHENT, _("Size of program header entry"), dec);
- TAG (AT_PHNUM, _("Number of program headers"), dec);
- TAG (AT_PAGESZ, _("System page size"), dec);
- TAG (AT_BASE, _("Base address of interpreter"), hex);
- TAG (AT_FLAGS, _("Flags"), hex);
- TAG (AT_ENTRY, _("Entry point of program"), hex);
- TAG (AT_NOTELF, _("Program is not ELF"), dec);
- TAG (AT_UID, _("Real user ID"), dec);
- TAG (AT_EUID, _("Effective user ID"), dec);
- TAG (AT_GID, _("Real group ID"), dec);
- TAG (AT_EGID, _("Effective group ID"), dec);
- TAG (AT_CLKTCK, _("Frequency of times()"), dec);
- TAG (AT_PLATFORM, _("String identifying platform"), str);
- TAG (AT_HWCAP, _("Machine-dependent CPU capability hints"), hex);
- TAG (AT_FPUCW, _("Used FPU control word"), dec);
- TAG (AT_DCACHEBSIZE, _("Data cache block size"), dec);
- TAG (AT_ICACHEBSIZE, _("Instruction cache block size"), dec);
- TAG (AT_UCACHEBSIZE, _("Unified cache block size"), dec);
- TAG (AT_IGNOREPPC, _("Entry should be ignored"), dec);
- TAG (AT_BASE_PLATFORM, _("String identifying base platform"), str);
- TAG (AT_RANDOM, _("Address of 16 random bytes"), hex);
- TAG (AT_EXECFN, _("File name of executable"), str);
- TAG (AT_SECURE, _("Boolean, was exec setuid-like?"), dec);
- TAG (AT_SYSINFO, _("Special system info/entry points"), hex);
- TAG (AT_SYSINFO_EHDR, _("System-supplied DSO's ELF header"), hex);
- TAG (AT_SUN_UID, _("Effective user ID"), dec);
- TAG (AT_SUN_RUID, _("Real user ID"), dec);
- TAG (AT_SUN_GID, _("Effective group ID"), dec);
- TAG (AT_SUN_RGID, _("Real group ID"), dec);
- TAG (AT_SUN_LDELF, _("Dynamic linker's ELF header"), hex);
- TAG (AT_SUN_LDSHDR, _("Dynamic linker's section headers"), hex);
- TAG (AT_SUN_LDNAME, _("String giving name of dynamic linker"), str);
- TAG (AT_SUN_LPAGESZ, _("Large pagesize"), dec);
- TAG (AT_SUN_PLATFORM, _("Platform name string"), str);
- TAG (AT_SUN_HWCAP, _("Machine-dependent CPU capability hints"), hex);
- TAG (AT_SUN_IFLUSH, _("Should flush icache?"), dec);
- TAG (AT_SUN_CPU, _("CPU name string"), str);
- TAG (AT_SUN_EMUL_ENTRY, _("COFF entry point address"), hex);
- TAG (AT_SUN_EMUL_EXECFD, _("COFF executable file descriptor"), dec);
- TAG (AT_SUN_EXECNAME,
- _("Canonicalized file name given to execve"), str);
- TAG (AT_SUN_MMU, _("String for name of MMU module"), str);
- TAG (AT_SUN_LDDATA, _("Dynamic linker's data segment address"), hex);
- TAG (AT_SUN_AUXFLAGS,
- _("AF_SUN_ flags passed from the kernel"), hex);
- }
+ gdb_byte *data = info->data->data ();
+ gdb_byte *ptr = data;
+ size_t len = info->data->size ();
- fprintf_filtered (file, "%-4s %-20s %-30s ",
- plongest (type), name, description);
- switch (flavor)
- {
- case dec:
- fprintf_filtered (file, "%s\n", plongest (val));
- break;
- case hex:
- fprintf_filtered (file, "%s\n", paddress (target_gdbarch, val));
- break;
- case str:
- {
- struct value_print_options opts;
-
- get_user_print_options (&opts);
- if (opts.addressprint)
- fprintf_filtered (file, "%s", paddress (target_gdbarch, val));
- val_print_string (builtin_type (target_gdbarch)->builtin_char,
- NULL, val, -1, file, &opts);
- fprintf_filtered (file, "\n");
- }
- break;
- }
+ while (target_auxv_parse (&ptr, data + len, &type, &val) > 0)
+ {
+ gdbarch_print_auxv_entry (gdbarch, file, type, val);
++ents;
if (type == AT_NULL)
break;
}
- xfree (data);
-
return ents;
}
static void
-info_auxv_command (char *cmd, int from_tty)
+info_auxv_command (const char *cmd, int from_tty)
{
if (! target_has_stack)
error (_("The program has no auxiliary information now."));
else
{
- int ents = fprint_target_auxv (gdb_stdout, ¤t_target);
+ int ents = fprint_target_auxv (gdb_stdout, current_top_target ());
if (ents < 0)
error (_("No auxiliary vector found, or failed reading it."));
}
}
-
-extern initialize_file_ftype _initialize_auxv; /* -Wmissing-prototypes; */
-
+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);
}
projects / deliverable / binutils-gdb.git / blobdiff