/* GNU/Linux/m68k specific low level interface, for the remote server for GDB.
- Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002
- Free Software Foundation, Inc.
+ Copyright (C) 1995-2019 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "server.h"
#include "linux-low.h"
+/* Defined in auto-generated file reg-m68k.c. */
+void init_registers_m68k (void);
+extern const struct target_desc *tdesc_m68k;
+
#ifdef HAVE_SYS_REG_H
#include <sys/reg.h>
#endif
-#define m68k_num_regs 31
+#define m68k_num_regs 29
+#define m68k_num_gregs 18
/* This table must line up with REGISTER_NAMES in tm-m68k.h */
static int m68k_regmap[] =
return (regno >= m68k_num_regs);
}
+#ifdef HAVE_PTRACE_GETREGS
+#include <sys/procfs.h>
+#include "nat/gdb_ptrace.h"
+
+static void
+m68k_fill_gregset (struct regcache *regcache, void *buf)
+{
+ int i;
+
+ for (i = 0; i < m68k_num_gregs; i++)
+ collect_register (regcache, i, (char *) buf + m68k_regmap[i]);
+}
+
+static void
+m68k_store_gregset (struct regcache *regcache, const void *buf)
+{
+ int i;
+
+ for (i = 0; i < m68k_num_gregs; i++)
+ supply_register (regcache, i, (const char *) buf + m68k_regmap[i]);
+}
+
+static void
+m68k_fill_fpregset (struct regcache *regcache, void *buf)
+{
+ int i;
+
+ for (i = m68k_num_gregs; i < m68k_num_regs; i++)
+ collect_register (regcache, i, ((char *) buf
+ + (m68k_regmap[i] - m68k_regmap[m68k_num_gregs])));
+}
+
+static void
+m68k_store_fpregset (struct regcache *regcache, const void *buf)
+{
+ int i;
+
+ for (i = m68k_num_gregs; i < m68k_num_regs; i++)
+ supply_register (regcache, i, ((const char *) buf
+ + (m68k_regmap[i] - m68k_regmap[m68k_num_gregs])));
+}
+
+#endif /* HAVE_PTRACE_GETREGS */
+
+static struct regset_info m68k_regsets[] = {
+#ifdef HAVE_PTRACE_GETREGS
+ { PTRACE_GETREGS, PTRACE_SETREGS, 0, sizeof (elf_gregset_t),
+ GENERAL_REGS,
+ m68k_fill_gregset, m68k_store_gregset },
+ { PTRACE_GETFPREGS, PTRACE_SETFPREGS, 0, sizeof (elf_fpregset_t),
+ FP_REGS,
+ m68k_fill_fpregset, m68k_store_fpregset },
+#endif /* HAVE_PTRACE_GETREGS */
+ NULL_REGSET
+};
+
+static const gdb_byte m68k_breakpoint[] = { 0x4E, 0x4F };
+#define m68k_breakpoint_len 2
+
+/* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */
+
+static const gdb_byte *
+m68k_sw_breakpoint_from_kind (int kind, int *size)
+{
+ *size = m68k_breakpoint_len;
+ return m68k_breakpoint;
+}
+
+static int
+m68k_breakpoint_at (CORE_ADDR pc)
+{
+ unsigned char c[2];
+
+ read_inferior_memory (pc, c, 2);
+ if (c[0] == 0x4E && c[1] == 0x4F)
+ return 1;
+
+ return 0;
+}
+
+#include <asm/ptrace.h>
+
+#ifdef PTRACE_GET_THREAD_AREA
+/* Fetch the thread-local storage pointer for libthread_db. */
+
+ps_err_e
+ps_get_thread_area (struct ps_prochandle *ph,
+ lwpid_t lwpid, int idx, void **base)
+{
+ if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) != 0)
+ return PS_ERR;
+
+ /* IDX is the bias from the thread pointer to the beginning of the
+ thread descriptor. It has to be subtracted due to implementation
+ quirks in libthread_db. */
+ *base = (void *) ((char *)*base - idx);
+
+ return PS_OK;
+}
+#endif /* PTRACE_GET_THREAD_AREA */
+
+static struct regsets_info m68k_regsets_info =
+ {
+ m68k_regsets, /* regsets */
+ 0, /* num_regsets */
+ NULL, /* disabled_regsets */
+ };
+
+static struct usrregs_info m68k_usrregs_info =
+ {
+ m68k_num_regs,
+ m68k_regmap,
+ };
+
+static struct regs_info regs_info =
+ {
+ NULL, /* regset_bitmap */
+ &m68k_usrregs_info,
+ &m68k_regsets_info
+ };
+
+static const struct regs_info *
+m68k_regs_info (void)
+{
+ return ®s_info;
+}
+
+static void
+m68k_arch_setup (void)
+{
+ current_process ()->tdesc = tdesc_m68k;
+}
+
+/* Support for hardware single step. */
+
+static int
+m68k_supports_hardware_single_step (void)
+{
+ return 1;
+}
+
struct linux_target_ops the_low_target = {
- m68k_num_regs,
- m68k_regmap,
+ m68k_arch_setup,
+ m68k_regs_info,
m68k_cannot_fetch_register,
m68k_cannot_store_register,
+ NULL, /* fetch_register */
+ linux_get_pc_32bit,
+ linux_set_pc_32bit,
+ NULL, /* breakpoint_kind_from_pc */
+ m68k_sw_breakpoint_from_kind,
+ NULL,
+ 2,
+ m68k_breakpoint_at,
+ NULL, /* supports_z_point_type */
+ NULL, /* insert_point */
+ NULL, /* remove_point */
+ NULL, /* stopped_by_watchpoint */
+ NULL, /* stopped_data_address */
+ NULL, /* collect_ptrace_register */
+ NULL, /* supply_ptrace_register */
+ NULL, /* siginfo_fixup */
+ NULL, /* new_process */
+ NULL, /* delete_process */
+ NULL, /* new_thread */
+ NULL, /* delete_thread */
+ NULL, /* new_fork */
+ NULL, /* prepare_to_resume */
+ NULL, /* process_qsupported */
+ NULL, /* supports_tracepoints */
+ NULL, /* get_thread_area */
+ NULL, /* install_fast_tracepoint_jump_pad */
+ NULL, /* emit_ops */
+ NULL, /* get_min_fast_tracepoint_insn_len */
+ NULL, /* supports_range_stepping */
+ NULL, /* breakpoint_kind_from_current_state */
+ m68k_supports_hardware_single_step,
};
+
+void
+initialize_low_arch (void)
+{
+ /* Initialize the Linux target descriptions. */
+ init_registers_m68k ();
+
+ initialize_regsets_info (&m68k_regsets_info);
+}
projects / deliverable / binutils-gdb.git / blobdiff