#include "record.h"
#include "record-full.h"
-#include <stdint.h>
-
#include "features/i386/i386.c"
#include "features/i386/i386-avx.c"
#include "features/i386/i386-mpx.c"
/* Normal frames, but in a function epilogue. */
-/* The epilogue is defined here as the 'ret' instruction, which will
+/* Implement the stack_frame_destroyed_p gdbarch method.
+
+ The epilogue is defined here as the 'ret' instruction, which will
follow any instruction such as 'leave' or 'pop %ebp' that destroys
the function's stack frame. */
static int
-i386_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc)
+i386_stack_frame_destroyed_p (struct gdbarch *gdbarch, CORE_ADDR pc)
{
gdb_byte insn;
struct compunit_symtab *cust;
void **this_prologue_cache)
{
if (frame_relative_level (this_frame) == 0)
- return i386_in_function_epilogue_p (get_frame_arch (this_frame),
- get_frame_pc (this_frame));
+ return i386_stack_frame_destroyed_p (get_frame_arch (this_frame),
+ get_frame_pc (this_frame));
else
return 0;
}
string. */
static int
-i386_fast_tracepoint_valid_at (struct gdbarch *gdbarch,
- CORE_ADDR addr, int *isize, char **msg)
+i386_fast_tracepoint_valid_at (struct gdbarch *gdbarch, CORE_ADDR addr,
+ char **msg)
{
int len, jumplen;
static struct ui_file *gdb_null = NULL;
/* Check for fit. */
len = gdb_print_insn (gdbarch, addr, gdb_null, NULL);
- if (isize)
- *isize = len;
if (len < jumplen)
{
}
\f
+/* Return the target description for a specified XSAVE feature mask. */
+
+const struct target_desc *
+i386_target_description (uint64_t xcr0)
+{
+ switch (xcr0 & X86_XSTATE_ALL_MASK)
+ {
+ case X86_XSTATE_MPX_AVX512_MASK:
+ case X86_XSTATE_AVX512_MASK:
+ return tdesc_i386_avx512;
+ case X86_XSTATE_MPX_MASK:
+ return tdesc_i386_mpx;
+ case X86_XSTATE_AVX_MASK:
+ return tdesc_i386_avx;
+ default:
+ return tdesc_i386;
+ }
+}
+
+#define MPX_BASE_MASK (~(ULONGEST) 0xfff)
+
+/* Find the bound directory base address. */
+
+static unsigned long
+i386_mpx_bd_base (void)
+{
+ struct regcache *rcache;
+ struct gdbarch_tdep *tdep;
+ ULONGEST ret;
+ enum register_status regstatus;
+ struct gdb_exception except;
+
+ rcache = get_current_regcache ();
+ tdep = gdbarch_tdep (get_regcache_arch (rcache));
+
+ regstatus = regcache_raw_read_unsigned (rcache, tdep->bndcfgu_regnum, &ret);
+
+ if (regstatus != REG_VALID)
+ error (_("BNDCFGU register invalid, read status %d."), regstatus);
+
+ return ret & MPX_BASE_MASK;
+}
+
+/* Check if the current target is MPX enabled. */
+
+static int
+i386_mpx_enabled (void)
+{
+ const struct gdbarch_tdep *tdep = gdbarch_tdep (get_current_arch ());
+ const struct target_desc *tdesc = tdep->tdesc;
+
+ return (tdesc_find_feature (tdesc, "org.gnu.gdb.i386.mpx") != NULL);
+}
+
+#define MPX_BD_MASK 0xfffffff00000ULL /* select bits [47:20] */
+#define MPX_BT_MASK 0x0000000ffff8 /* select bits [19:3] */
+#define MPX_BD_MASK_32 0xfffff000 /* select bits [31:12] */
+#define MPX_BT_MASK_32 0x00000ffc /* select bits [11:2] */
+
+/* Find the bound table entry given the pointer location and the base
+ address of the table. */
+
+static CORE_ADDR
+i386_mpx_get_bt_entry (CORE_ADDR ptr, CORE_ADDR bd_base)
+{
+ CORE_ADDR offset1;
+ CORE_ADDR offset2;
+ CORE_ADDR mpx_bd_mask, bd_ptr_r_shift, bd_ptr_l_shift;
+ CORE_ADDR bt_mask, bt_select_r_shift, bt_select_l_shift;
+ CORE_ADDR bd_entry_addr;
+ CORE_ADDR bt_addr;
+ CORE_ADDR bd_entry;
+ struct gdbarch *gdbarch = get_current_arch ();
+ struct type *data_ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
+
+
+ if (gdbarch_ptr_bit (gdbarch) == 64)
+ {
+ mpx_bd_mask = (CORE_ADDR) MPX_BD_MASK;
+ bd_ptr_r_shift = 20;
+ bd_ptr_l_shift = 3;
+ bt_select_r_shift = 3;
+ bt_select_l_shift = 5;
+ bt_mask = (CORE_ADDR) MPX_BT_MASK;
+
+ if ( sizeof (CORE_ADDR) == 4)
+ error (_("operation not supported"));
+ }
+ else
+ {
+ mpx_bd_mask = MPX_BD_MASK_32;
+ bd_ptr_r_shift = 12;
+ bd_ptr_l_shift = 2;
+ bt_select_r_shift = 2;
+ bt_select_l_shift = 4;
+ bt_mask = MPX_BT_MASK_32;
+ }
+
+ offset1 = ((ptr & mpx_bd_mask) >> bd_ptr_r_shift) << bd_ptr_l_shift;
+ bd_entry_addr = bd_base + offset1;
+ bd_entry = read_memory_typed_address (bd_entry_addr, data_ptr_type);
+
+ if ((bd_entry & 0x1) == 0)
+ error (_("Invalid bounds directory entry at %s."),
+ paddress (get_current_arch (), bd_entry_addr));
+
+ /* Clearing status bit. */
+ bd_entry--;
+ bt_addr = bd_entry & ~bt_select_r_shift;
+ offset2 = ((ptr & bt_mask) >> bt_select_r_shift) << bt_select_l_shift;
+
+ return bt_addr + offset2;
+}
+
+/* Print routine for the mpx bounds. */
+
+static void
+i386_mpx_print_bounds (const CORE_ADDR bt_entry[4])
+{
+ struct ui_out *uiout = current_uiout;
+ LONGEST size;
+ struct gdbarch *gdbarch = get_current_arch ();
+ CORE_ADDR onecompl = ~((CORE_ADDR) 0);
+ int bounds_in_map = ((~bt_entry[1] == 0 && bt_entry[0] == onecompl) ? 1 : 0);
+
+ if (bounds_in_map == 1)
+ {
+ ui_out_text (uiout, "Null bounds on map:");
+ ui_out_text (uiout, " pointer value = ");
+ ui_out_field_core_addr (uiout, "pointer-value", gdbarch, bt_entry[2]);
+ ui_out_text (uiout, ".");
+ ui_out_text (uiout, "\n");
+ }
+ else
+ {
+ ui_out_text (uiout, "{lbound = ");
+ ui_out_field_core_addr (uiout, "lower-bound", gdbarch, bt_entry[0]);
+ ui_out_text (uiout, ", ubound = ");
+
+ /* The upper bound is stored in 1's complement. */
+ ui_out_field_core_addr (uiout, "upper-bound", gdbarch, ~bt_entry[1]);
+ ui_out_text (uiout, "}: pointer value = ");
+ ui_out_field_core_addr (uiout, "pointer-value", gdbarch, bt_entry[2]);
+
+ if (gdbarch_ptr_bit (gdbarch) == 64)
+ size = ( (~(int64_t) bt_entry[1]) - (int64_t) bt_entry[0]);
+ else
+ size = ( ~((int32_t) bt_entry[1]) - (int32_t) bt_entry[0]);
+
+ /* In case the bounds are 0x0 and 0xffff... the difference will be -1.
+ -1 represents in this sense full memory access, and there is no need
+ one to the size. */
+
+ size = (size > -1 ? size + 1 : size);
+ ui_out_text (uiout, ", size = ");
+ ui_out_field_fmt (uiout, "size", "%s", plongest (size));
+
+ ui_out_text (uiout, ", metadata = ");
+ ui_out_field_core_addr (uiout, "metadata", gdbarch, bt_entry[3]);
+ ui_out_text (uiout, "\n");
+ }
+}
+
+/* Implement the command "show mpx bound". */
+
+static void
+i386_mpx_info_bounds (char *args, int from_tty)
+{
+ CORE_ADDR bd_base = 0;
+ CORE_ADDR addr;
+ CORE_ADDR bt_entry_addr = 0;
+ CORE_ADDR bt_entry[4];
+ int i;
+ struct gdbarch *gdbarch = get_current_arch ();
+ struct type *data_ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
+
+ if (!i386_mpx_enabled ())
+ {
+ printf_unfiltered (_("Intel(R) Memory Protection Extensions not "
+ "supported on this target.\n"));
+ return;
+ }
+
+ if (args == NULL)
+ {
+ printf_unfiltered (_("Address of pointer variable expected.\n"));
+ return;
+ }
+
+ addr = parse_and_eval_address (args);
+
+ bd_base = i386_mpx_bd_base ();
+ bt_entry_addr = i386_mpx_get_bt_entry (addr, bd_base);
+
+ memset (bt_entry, 0, sizeof (bt_entry));
+
+ for (i = 0; i < 4; i++)
+ bt_entry[i] = read_memory_typed_address (bt_entry_addr
+ + i * data_ptr_type->length,
+ data_ptr_type);
+
+ i386_mpx_print_bounds (bt_entry);
+}
+
+/* Implement the command "set mpx bound". */
+
+static void
+i386_mpx_set_bounds (char *args, int from_tty)
+{
+ CORE_ADDR bd_base = 0;
+ CORE_ADDR addr, lower, upper;
+ CORE_ADDR bt_entry_addr = 0;
+ CORE_ADDR bt_entry[2];
+ const char *input = args;
+ int i;
+ struct gdbarch *gdbarch = get_current_arch ();
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ struct type *data_ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
+
+ if (!i386_mpx_enabled ())
+ error (_("Intel(R) Memory Protection Extensions not supported\
+ on this target."));
+
+ if (args == NULL)
+ error (_("Pointer value expected."));
+
+ addr = value_as_address (parse_to_comma_and_eval (&input));
+
+ if (input[0] == ',')
+ ++input;
+ if (input[0] == '\0')
+ error (_("wrong number of arguments: missing lower and upper bound."));
+ lower = value_as_address (parse_to_comma_and_eval (&input));
+
+ if (input[0] == ',')
+ ++input;
+ if (input[0] == '\0')
+ error (_("Wrong number of arguments; Missing upper bound."));
+ upper = value_as_address (parse_to_comma_and_eval (&input));
+
+ bd_base = i386_mpx_bd_base ();
+ bt_entry_addr = i386_mpx_get_bt_entry (addr, bd_base);
+ for (i = 0; i < 2; i++)
+ bt_entry[i] = read_memory_typed_address (bt_entry_addr
+ + i * data_ptr_type->length,
+ data_ptr_type);
+ bt_entry[0] = (uint64_t) lower;
+ bt_entry[1] = ~(uint64_t) upper;
+
+ for (i = 0; i < 2; i++)
+ write_memory_unsigned_integer (bt_entry_addr + i * data_ptr_type->length,
+ data_ptr_type->length, byte_order,
+ bt_entry[i]);
+}
+
+static struct cmd_list_element *mpx_set_cmdlist, *mpx_show_cmdlist;
+
+/* Helper function for the CLI commands. */
+
+static void
+set_mpx_cmd (char *args, int from_tty)
+{
+ help_list (mpx_set_cmdlist, "set mpx ", all_commands, gdb_stdout);
+}
+
+/* Helper function for the CLI commands. */
+
+static void
+show_mpx_cmd (char *args, int from_tty)
+{
+ cmd_show_list (mpx_show_cmdlist, from_tty, "");
+}
+
/* Provide a prototype to silence -Wmissing-prototypes. */
void _initialize_i386_tdep (void);
NULL, /* FIXME: i18n: */
&setlist, &showlist);
+ /* Add "mpx" prefix for the set commands. */
+
+ add_prefix_cmd ("mpx", class_support, set_mpx_cmd, _("\
+Set Intel(R) Memory Protection Extensions specific variables."),
+ &mpx_set_cmdlist, "set mpx ",
+ 0 /* allow-unknown */, &setlist);
+
+ /* Add "mpx" prefix for the show commands. */
+
+ add_prefix_cmd ("mpx", class_support, show_mpx_cmd, _("\
+Show Intel(R) Memory Protection Extensions specific variables."),
+ &mpx_show_cmdlist, "show mpx ",
+ 0 /* allow-unknown */, &showlist);
+
+ /* Add "bound" command for the show mpx commands list. */
+
+ add_cmd ("bound", no_class, i386_mpx_info_bounds,
+ "Show the memory bounds for a given array/pointer storage\
+ in the bound table.",
+ &mpx_show_cmdlist);
+
+ /* Add "bound" command for the set mpx commands list. */
+
+ add_cmd ("bound", no_class, i386_mpx_set_bounds,
+ "Set the memory bounds for a given array/pointer storage\
+ in the bound table.",
+ &mpx_set_cmdlist);
+
gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour,
i386_coff_osabi_sniffer);
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