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b6542f81d0
This patch is to support displaced stepping in aarch64-linux. A
visitor is implemented for displaced stepping, and used to record
information to fixup pc after displaced stepping if needed. Some
emit_* functions are converted to macros, and moved to
arch/aarch64-insn.{c,h} so that they can be shared.
gdb:
2015-10-12 Yao Qi <yao.qi@linaro.org>
* aarch64-linux-tdep.c: Include arch-utils.h.
(aarch64_linux_init_abi): Call set_gdbarch_max_insn_length,
set_gdbarch_displaced_step_copy_insn,
set_gdbarch_displaced_step_fixup,
set_gdbarch_displaced_step_free_closure,
set_gdbarch_displaced_step_location,
and set_gdbarch_displaced_step_hw_singlestep.
* aarch64-tdep.c (struct displaced_step_closure): New.
(struct aarch64_displaced_step_data): New.
(aarch64_displaced_step_b): New function.
(aarch64_displaced_step_b_cond): Likewise.
(aarch64_register): Likewise.
(aarch64_displaced_step_cb): Likewise.
(aarch64_displaced_step_tb): Likewise.
(aarch64_displaced_step_adr): Likewise.
(aarch64_displaced_step_ldr_literal): Likewise.
(aarch64_displaced_step_others): Likewise.
(aarch64_displaced_step_copy_insn): Likewise.
(aarch64_displaced_step_fixup): Likewise.
(aarch64_displaced_step_hw_singlestep): Likewise.
* aarch64-tdep.h (DISPLACED_MODIFIED_INSNS): New macro.
(aarch64_displaced_step_copy_insn): Declare.
(aarch64_displaced_step_fixup): Declare.
(aarch64_displaced_step_hw_singlestep): Declare.
* arch/aarch64-insn.c (emit_insn): Moved from
gdbserver/linux-aarch64-low.c.
(emit_load_store): Likewise.
* arch/aarch64-insn.h (enum aarch64_opcodes): Moved from
gdbserver/linux-aarch64-low.c.
(struct aarch64_register): Likewise.
(struct aarch64_memory_operand): Likewise.
(ENCODE): Likewise.
(can_encode_int32): New macro.
(emit_b, emit_bcond, emit_cb, emit_ldr, emit_ldrsw): Likewise.
(emit_tb, emit_nop): Likewise.
(emit_insn): Declare.
(emit_load_store): Declare.
gdb/gdbserver:
2015-10-12 Yao Qi <yao.qi@linaro.org>
* linux-aarch64-low.c (enum aarch64_opcodes): Move to
arch/aarch64-insn.h.
(struct aarch64_memory_operand): Likewise.
(ENCODE): Likewise.
(emit_insn): Move to arch/aarch64-insn.c.
(emit_b, emit_bcond, emit_cb, emit_tb): Remove.
(emit_load_store): Move to arch/aarch64-insn.c.
(emit_ldr, emit_ldrb, emit_ldrsw, emit_nop): Remove.
(can_encode_int32): Remove.
119 lines
3.7 KiB
C
119 lines
3.7 KiB
C
/* Common target dependent code for GDB on AArch64 systems.
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Copyright (C) 2009-2015 Free Software Foundation, Inc.
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Contributed by ARM Ltd.
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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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#ifndef AARCH64_TDEP_H
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#define AARCH64_TDEP_H
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/* Forward declarations. */
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struct gdbarch;
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struct regset;
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/* AArch64 Dwarf register numbering. */
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#define AARCH64_DWARF_X0 0
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#define AARCH64_DWARF_SP 31
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#define AARCH64_DWARF_V0 64
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/* Register numbers of various important registers. */
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enum aarch64_regnum
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{
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AARCH64_X0_REGNUM, /* First integer register */
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/* Frame register in AArch64 code, if used. */
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AARCH64_FP_REGNUM = AARCH64_X0_REGNUM + 29,
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AARCH64_LR_REGNUM = AARCH64_X0_REGNUM + 30, /* Return address */
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AARCH64_SP_REGNUM, /* Stack pointer */
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AARCH64_PC_REGNUM, /* Program counter */
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AARCH64_CPSR_REGNUM, /* Contains status register */
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AARCH64_V0_REGNUM, /* First floating point / vector register */
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/* Last floating point / vector register */
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AARCH64_V31_REGNUM = AARCH64_V0_REGNUM + 31,
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AARCH64_FPSR_REGNUM, /* Floating point status register */
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AARCH64_FPCR_REGNUM, /* Floating point control register */
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/* Other useful registers. */
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/* Last integer-like argument */
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AARCH64_LAST_X_ARG_REGNUM = AARCH64_X0_REGNUM + 7,
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AARCH64_STRUCT_RETURN_REGNUM = AARCH64_X0_REGNUM + 8,
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AARCH64_LAST_V_ARG_REGNUM = AARCH64_V0_REGNUM + 7
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};
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/* Size of integer registers. */
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#define X_REGISTER_SIZE 8
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#define B_REGISTER_SIZE 1
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#define H_REGISTER_SIZE 2
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#define S_REGISTER_SIZE 4
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#define D_REGISTER_SIZE 8
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#define V_REGISTER_SIZE 16
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#define Q_REGISTER_SIZE 16
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/* Total number of general (X) registers. */
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#define AARCH64_X_REGISTER_COUNT 32
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/* The maximum number of modified instructions generated for one
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single-stepped instruction. */
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#define DISPLACED_MODIFIED_INSNS 1
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/* Target-dependent structure in gdbarch. */
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struct gdbarch_tdep
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{
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/* Lowest address at which instructions will appear. */
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CORE_ADDR lowest_pc;
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/* Offset to PC value in jump buffer. If this is negative, longjmp
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support will be disabled. */
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int jb_pc;
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/* And the size of each entry in the buf. */
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size_t jb_elt_size;
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/* Types for AdvSISD registers. */
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struct type *vnq_type;
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struct type *vnd_type;
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struct type *vns_type;
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struct type *vnh_type;
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struct type *vnb_type;
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/* syscall record. */
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int (*aarch64_syscall_record) (struct regcache *regcache, unsigned long svc_number);
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};
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extern struct target_desc *tdesc_aarch64;
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extern int aarch64_process_record (struct gdbarch *gdbarch,
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struct regcache *regcache, CORE_ADDR addr);
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struct displaced_step_closure *
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aarch64_displaced_step_copy_insn (struct gdbarch *gdbarch,
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CORE_ADDR from, CORE_ADDR to,
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struct regcache *regs);
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void aarch64_displaced_step_fixup (struct gdbarch *gdbarch,
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struct displaced_step_closure *dsc,
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CORE_ADDR from, CORE_ADDR to,
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struct regcache *regs);
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int aarch64_displaced_step_hw_singlestep (struct gdbarch *gdbarch,
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struct displaced_step_closure *closure);
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#endif /* aarch64-tdep.h */
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