mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-03 04:12:10 +08:00
1d506c26d9
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
271 lines
6.2 KiB
C++
271 lines
6.2 KiB
C++
/* GNU/Linux/m68k specific low level interface, for the remote server for GDB.
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Copyright (C) 1995-2024 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "server.h"
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#include "linux-low.h"
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/* Linux target op definitions for the m68k architecture. */
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class m68k_target : public linux_process_target
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{
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public:
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const regs_info *get_regs_info () override;
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const gdb_byte *sw_breakpoint_from_kind (int kind, int *size) override;
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protected:
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void low_arch_setup () override;
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bool low_cannot_fetch_register (int regno) override;
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bool low_cannot_store_register (int regno) override;
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bool low_supports_breakpoints () override;
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CORE_ADDR low_get_pc (regcache *regcache) override;
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void low_set_pc (regcache *regcache, CORE_ADDR newpc) override;
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int low_decr_pc_after_break () override;
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bool low_breakpoint_at (CORE_ADDR pc) override;
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};
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/* The singleton target ops object. */
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static m68k_target the_m68k_target;
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bool
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m68k_target::low_supports_breakpoints ()
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{
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return true;
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}
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CORE_ADDR
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m68k_target::low_get_pc (regcache *regcache)
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{
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return linux_get_pc_32bit (regcache);
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}
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void
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m68k_target::low_set_pc (regcache *regcache, CORE_ADDR pc)
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{
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linux_set_pc_32bit (regcache, pc);
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}
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int
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m68k_target::low_decr_pc_after_break ()
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{
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return 2;
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}
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/* Defined in auto-generated file reg-m68k.c. */
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void init_registers_m68k (void);
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extern const struct target_desc *tdesc_m68k;
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#ifdef HAVE_SYS_REG_H
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#include <sys/reg.h>
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#endif
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#define m68k_num_regs 29
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#define m68k_num_gregs 18
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/* This table must line up with REGISTER_NAMES in tm-m68k.h */
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static int m68k_regmap[] =
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{
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#ifdef PT_D0
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PT_D0 * 4, PT_D1 * 4, PT_D2 * 4, PT_D3 * 4,
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PT_D4 * 4, PT_D5 * 4, PT_D6 * 4, PT_D7 * 4,
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PT_A0 * 4, PT_A1 * 4, PT_A2 * 4, PT_A3 * 4,
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PT_A4 * 4, PT_A5 * 4, PT_A6 * 4, PT_USP * 4,
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PT_SR * 4, PT_PC * 4,
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#else
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14 * 4, 0 * 4, 1 * 4, 2 * 4, 3 * 4, 4 * 4, 5 * 4, 6 * 4,
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7 * 4, 8 * 4, 9 * 4, 10 * 4, 11 * 4, 12 * 4, 13 * 4, 15 * 4,
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17 * 4, 18 * 4,
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#endif
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#ifdef PT_FP0
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PT_FP0 * 4, PT_FP1 * 4, PT_FP2 * 4, PT_FP3 * 4,
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PT_FP4 * 4, PT_FP5 * 4, PT_FP6 * 4, PT_FP7 * 4,
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PT_FPCR * 4, PT_FPSR * 4, PT_FPIAR * 4
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#else
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21 * 4, 24 * 4, 27 * 4, 30 * 4, 33 * 4, 36 * 4,
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39 * 4, 42 * 4, 45 * 4, 46 * 4, 47 * 4
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#endif
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};
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bool
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m68k_target::low_cannot_store_register (int regno)
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{
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return (regno >= m68k_num_regs);
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}
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bool
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m68k_target::low_cannot_fetch_register (int regno)
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{
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return (regno >= m68k_num_regs);
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}
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#ifdef HAVE_PTRACE_GETREGS
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#include <sys/procfs.h>
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#include "nat/gdb_ptrace.h"
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static void
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m68k_fill_gregset (struct regcache *regcache, void *buf)
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{
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int i;
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for (i = 0; i < m68k_num_gregs; i++)
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collect_register (regcache, i, (char *) buf + m68k_regmap[i]);
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}
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static void
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m68k_store_gregset (struct regcache *regcache, const void *buf)
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{
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int i;
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for (i = 0; i < m68k_num_gregs; i++)
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supply_register (regcache, i, (const char *) buf + m68k_regmap[i]);
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}
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static void
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m68k_fill_fpregset (struct regcache *regcache, void *buf)
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{
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int i;
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for (i = m68k_num_gregs; i < m68k_num_regs; i++)
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collect_register (regcache, i, ((char *) buf
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+ (m68k_regmap[i] - m68k_regmap[m68k_num_gregs])));
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}
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static void
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m68k_store_fpregset (struct regcache *regcache, const void *buf)
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{
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int i;
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for (i = m68k_num_gregs; i < m68k_num_regs; i++)
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supply_register (regcache, i, ((const char *) buf
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+ (m68k_regmap[i] - m68k_regmap[m68k_num_gregs])));
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}
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#endif /* HAVE_PTRACE_GETREGS */
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static struct regset_info m68k_regsets[] = {
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#ifdef HAVE_PTRACE_GETREGS
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{ PTRACE_GETREGS, PTRACE_SETREGS, 0, sizeof (elf_gregset_t),
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GENERAL_REGS,
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m68k_fill_gregset, m68k_store_gregset },
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{ PTRACE_GETFPREGS, PTRACE_SETFPREGS, 0, sizeof (elf_fpregset_t),
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FP_REGS,
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m68k_fill_fpregset, m68k_store_fpregset },
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#endif /* HAVE_PTRACE_GETREGS */
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NULL_REGSET
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};
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static const gdb_byte m68k_breakpoint[] = { 0x4E, 0x4F };
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#define m68k_breakpoint_len 2
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/* Implementation of target ops method "sw_breakpoint_from_kind". */
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const gdb_byte *
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m68k_target::sw_breakpoint_from_kind (int kind, int *size)
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{
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*size = m68k_breakpoint_len;
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return m68k_breakpoint;
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}
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bool
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m68k_target::low_breakpoint_at (CORE_ADDR pc)
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{
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unsigned char c[2];
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read_inferior_memory (pc, c, 2);
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if (c[0] == 0x4E && c[1] == 0x4F)
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return true;
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return false;
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}
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#include <asm/ptrace.h>
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#ifdef PTRACE_GET_THREAD_AREA
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/* Fetch the thread-local storage pointer for libthread_db. */
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ps_err_e
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ps_get_thread_area (struct ps_prochandle *ph,
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lwpid_t lwpid, int idx, void **base)
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{
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if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) != 0)
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return PS_ERR;
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/* IDX is the bias from the thread pointer to the beginning of the
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thread descriptor. It has to be subtracted due to implementation
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quirks in libthread_db. */
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*base = (void *) ((char *)*base - idx);
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return PS_OK;
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}
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#endif /* PTRACE_GET_THREAD_AREA */
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static struct regsets_info m68k_regsets_info =
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{
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m68k_regsets, /* regsets */
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0, /* num_regsets */
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NULL, /* disabled_regsets */
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};
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static struct usrregs_info m68k_usrregs_info =
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{
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m68k_num_regs,
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m68k_regmap,
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};
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static struct regs_info myregs_info =
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{
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NULL, /* regset_bitmap */
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&m68k_usrregs_info,
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&m68k_regsets_info
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};
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const regs_info *
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m68k_target::get_regs_info ()
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{
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return &myregs_info;
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}
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void
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m68k_target::low_arch_setup ()
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{
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current_process ()->tdesc = tdesc_m68k;
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}
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/* The linux target ops object. */
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linux_process_target *the_linux_target = &the_m68k_target;
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void
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initialize_low_arch (void)
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{
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/* Initialize the Linux target descriptions. */
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init_registers_m68k ();
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initialize_regsets_info (&m68k_regsets_info);
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}
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