/* Dynamic architecture support for GDB, the GNU debugger.
- Copyright (C) 1998-2017 Free Software Foundation, Inc.
+ Copyright (C) 1998-2020 Free Software Foundation, Inc.
This file is part of GDB.
#include "defs.h"
#include "arch-utils.h"
-#include "buildsym.h"
#include "gdbcmd.h"
#include "inferior.h" /* enum CALL_DUMMY_LOCATION et al. */
#include "infrun.h"
#include "language.h"
#include "symtab.h"
-#include "version.h"
+#include "gdbsupport/version.h"
#include "floatformat.h"
-
-struct displaced_step_closure *
-simple_displaced_step_copy_insn (struct gdbarch *gdbarch,
- CORE_ADDR from, CORE_ADDR to,
- struct regcache *regs)
-{
- size_t len = gdbarch_max_insn_length (gdbarch);
- gdb_byte *buf = (gdb_byte *) xmalloc (len);
-
- read_memory (from, buf, len);
- write_memory (to, buf, len);
-
- if (debug_displaced)
- {
- fprintf_unfiltered (gdb_stdlog, "displaced: copy %s->%s: ",
- paddress (gdbarch, from), paddress (gdbarch, to));
- displaced_step_dump_bytes (gdb_stdlog, buf, len);
- }
-
- return (struct displaced_step_closure *) buf;
-}
-
-
-void
-simple_displaced_step_free_closure (struct gdbarch *gdbarch,
- struct displaced_step_closure *closure)
-{
- xfree (closure);
-}
+#include "dis-asm.h"
int
default_displaced_step_hw_singlestep (struct gdbarch *gdbarch,
- struct displaced_step_closure *closure)
+ struct displaced_step_copy_insn_closure *closure)
{
return !gdbarch_software_single_step_p (gdbarch);
}
gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch));
/* NOTE: cagney/2002-05-13: The old code did it this way and it is
suspected that some GDB/SIM combinations may rely on this
- behavour. The default should be one2one_register_sim_regno
+ behaviour. The default should be one2one_register_sim_regno
(below). */
if (gdbarch_register_name (gdbarch, regnum) != NULL
&& gdbarch_register_name (gdbarch, regnum)[0] != '\0')
}
static void
-set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c)
+set_endian (const char *ignore_args, int from_tty, struct cmd_list_element *c)
{
struct gdbarch_info info;
SELECTED may be NULL, in which case we return the architecture
associated with TARGET_DESC. If SELECTED specifies a variant
- of the architecture associtated with TARGET_DESC, return the
+ of the architecture associated with TARGET_DESC, return the
more specific of the two.
If SELECTED is a different architecture, but it is accepted as
argument. */
static void
-set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c)
+set_architecture (const char *ignore_args,
+ int from_tty, struct cmd_list_element *c)
{
struct gdbarch_info info;
memset (info, 0, sizeof (struct gdbarch_info));
info->byte_order = BFD_ENDIAN_UNKNOWN;
info->byte_order_for_code = info->byte_order;
- info->osabi = GDB_OSABI_UNINITIALIZED;
}
/* Similar to init, but this time fill in the blanks. Information is
if (info->byte_order == BFD_ENDIAN_UNKNOWN)
info->byte_order = default_byte_order;
info->byte_order_for_code = info->byte_order;
+ /* Wire the default to the last selected byte order. */
+ default_byte_order = info->byte_order;
/* "(gdb) set osabi ...". Handled by gdbarch_lookup_osabi. */
/* From the manual override, or from file. */
- if (info->osabi == GDB_OSABI_UNINITIALIZED)
+ if (info->osabi == GDB_OSABI_UNKNOWN)
info->osabi = gdbarch_lookup_osabi (info->abfd);
/* From the target. */
+
if (info->osabi == GDB_OSABI_UNKNOWN && info->target_desc != NULL)
info->osabi = tdesc_osabi (info->target_desc);
/* From the configured default. */
if (info->osabi == GDB_OSABI_UNKNOWN)
info->osabi = GDB_OSABI_DEFAULT;
#endif
+ /* If we still don't know which osabi to pick, pick none. */
+ if (info->osabi == GDB_OSABI_UNKNOWN)
+ info->osabi = GDB_OSABI_NONE;
/* Must have at least filled in the architecture. */
gdb_assert (info->bfd_arch_info != NULL);
int
default_fast_tracepoint_valid_at (struct gdbarch *gdbarch, CORE_ADDR addr,
- char **msg)
+ std::string *msg)
{
/* We don't know if maybe the target has some way to do fast
tracepoints that doesn't need gdbarch, so always say yes. */
if (msg)
- *msg = NULL;
+ msg->clear ();
return 1;
}
/* Usually, the return value's address is stored the in the "first hidden"
parameter if the return value should be passed by reference, as
specified in ABI. */
- return language_pass_by_reference (type);
+ return !(language_pass_by_reference (type).trivially_copyable);
}
int default_insn_is_call (struct gdbarch *gdbarch, CORE_ADDR addr)
return 0;
}
+/* See arch-utils.h. */
+
+bool
+default_program_breakpoint_here_p (struct gdbarch *gdbarch,
+ CORE_ADDR address)
+{
+ int len;
+ const gdb_byte *bpoint = gdbarch_breakpoint_from_pc (gdbarch, &address, &len);
+
+ /* Software breakpoints unsupported? */
+ if (bpoint == nullptr)
+ return false;
+
+ gdb_byte *target_mem = (gdb_byte *) alloca (len);
+
+ /* Enable the automatic memory restoration from breakpoints while
+ we read the memory. Otherwise we may find temporary breakpoints, ones
+ inserted by GDB, and flag them as permanent breakpoints. */
+ scoped_restore restore_memory
+ = make_scoped_restore_show_memory_breakpoints (0);
+
+ if (target_read_memory (address, target_mem, len) == 0)
+ {
+ /* Check if this is a breakpoint instruction for this architecture,
+ including ones used by GDB. */
+ if (memcmp (target_mem, bpoint, len) == 0)
+ return true;
+ }
+
+ return false;
+}
+
void
default_skip_permanent_breakpoint (struct regcache *regcache)
{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch *gdbarch = regcache->arch ();
CORE_ADDR current_pc = regcache_read_pc (regcache);
int bp_len;
/* -mcmodel=large is used so that no GOT (Global Offset Table) is needed to be
created in inferior memory by GDB (normally it is set by ld.so). */
-char *
+std::string
default_gcc_target_options (struct gdbarch *gdbarch)
{
- return xstrprintf ("-m%d%s", gdbarch_ptr_bit (gdbarch),
- gdbarch_ptr_bit (gdbarch) == 64 ? " -mcmodel=large" : "");
+ return string_printf ("-m%d%s", gdbarch_ptr_bit (gdbarch),
+ (gdbarch_ptr_bit (gdbarch) == 64
+ ? " -mcmodel=large" : ""));
}
/* gdbarch gnu_triplet_regexp method. */
regs = (gdb_byte *) alloca (register_size (gdbarch, pc_regno));
store_unsigned_integer (regs, register_size (gdbarch, pc_regno),
gdbarch_byte_order (gdbarch), addr);
- regcache_raw_supply (regcache, pc_regno, regs);
+ regcache->raw_supply (pc_regno, regs);
+}
+
+int
+default_print_insn (bfd_vma memaddr, disassemble_info *info)
+{
+ disassembler_ftype disassemble_fn;
+
+ disassemble_fn = disassembler (info->arch, info->endian == BFD_ENDIAN_BIG,
+ info->mach, exec_bfd);
+
+ gdb_assert (disassemble_fn != NULL);
+ return (*disassemble_fn) (memaddr, info);
+}
+
+/* See arch-utils.h. */
+
+CORE_ADDR
+gdbarch_skip_prologue_noexcept (gdbarch *gdbarch, CORE_ADDR pc) noexcept
+{
+ CORE_ADDR new_pc = pc;
+
+ try
+ {
+ new_pc = gdbarch_skip_prologue (gdbarch, pc);
+ }
+ catch (const gdb_exception &ex)
+ {}
+
+ return new_pc;
}
-/* -Wmissing-prototypes */
-extern initialize_file_ftype _initialize_gdbarch_utils;
+/* See arch-utils.h. */
+
+bool
+default_in_indirect_branch_thunk (gdbarch *gdbarch, CORE_ADDR pc)
+{
+ return false;
+}
+
+/* See arch-utils.h. */
+
+ULONGEST
+default_type_align (struct gdbarch *gdbarch, struct type *type)
+{
+ return 0;
+}
+
+/* See arch-utils.h. */
+
+std::string
+default_get_pc_address_flags (frame_info *frame, CORE_ADDR pc)
+{
+ return "";
+}
+void _initialize_gdbarch_utils ();
void
-_initialize_gdbarch_utils (void)
+_initialize_gdbarch_utils ()
{
add_setshow_enum_cmd ("endian", class_support,
endian_enum, &set_endian_string,
projects / deliverable / binutils-gdb.git / blobdiff