This is as per the spec:
https://developer.arm.com/products/architecture/a-profile/docs/100985/0000
gdb/
* aarch64-tdep.c (aarch64_dwarf_reg_to_regnum): Add mappings.
* aarch64-tdep.h (AARCH64_DWARF_SVE_VG): Add define.
(AARCH64_DWARF_SVE_FFR): Likewise.
(AARCH64_DWARF_SVE_P0): Likewise.
(AARCH64_DWARF_SVE_Z0): Likewise.
Add the functionality for reading/writing pseudo registers.
On SVE the V registers are pseudo registers. This is supported
by adding AARCH64_SVE_V0_REGNUM.
* aarch64-tdep.c (AARCH64_SVE_V0_REGNUM): Add define.
(aarch64_vnv_type): Add function.
(aarch64_pseudo_register_name): Add V regs for SVE.
(aarch64_pseudo_register_type): Likewise.
(aarch64_pseudo_register_reggroup_p): Likewise.
(aarch64_pseudo_read_value_2): Use V0 offset for SVE
(aarch64_pseudo_read_value): Add V regs for SVE.
(aarch64_pseudo_write_2): Use V0 offset for SVE
(aarch64_pseudo_write): Add V regs for SVE.
* aarch64-tdep.h (struct gdbarch_tdep): Add vnv_type.
Enable SVE support for GDB by reading the VQ when creating a
target description.
Also ensurse that SVE is taken into account when creating
the tdep structure, and store the current VQ value directly in tdep.
gdb/
* aarch64-linux-nat.c (aarch64_linux_read_description): Support SVE.
* aarch64-tdep.c (aarch64_get_tdesc_vq): New function.
(aarch64_gdbarch_init): Check for SVE.
* aarch64-tdep.h (gdbarch_tdep::has_sve): New function.
Previously VQ was of type long. Using uint64_t ensures it always matches the
same type as the VG register.
Note that in the Linux kernel, VQ is 16bits. We cast it up to 64bits
immediately after reading to ensure we always use the same type throughout
the code.
gdb/
* aarch64-tdep.c (aarch64_read_description): Use uint64_t for VQ.
* aarch64-tdep.h (aarch64_read_description): Likewise.
* arch/aarch64.c (aarch64_create_target_description): Likewise.
* arch/aarch64.h (aarch64_create_target_description): Likewise.
* features/aarch64-sve.c (create_feature_aarch64_sve): Likewise.
* nat/aarch64-sve-linux-ptrace.c(aarch64_sve_get_vq): Likewise.
* nat/aarch64-sve-linux-ptrace.h (aarch64_sve_get_vq): Likewise.
This applies the second part of GDB's End of Year Procedure, which
updates the copyright year range in all of GDB's files.
gdb/ChangeLog:
Update copyright year range in all GDB files.
We don't track FP registers in aarch64 prologue analyzer, so this causes
an internal error when FP registers are saved by "stp" instruction in
prologue (stp d8, d9, [sp,#128]),
tbreak _Unwind_RaiseException^M
aarch64-tdep.c:335: internal-error: CORE_ADDR aarch64_analyze_prologue(gdbarch*, CORE_ADDR, CORE_ADDR, aarch64_prologue_cache*): Assertion `inst.operands[0].type == AARCH64_OPND_Rt' failed.^M
A problem internal to GDB has been detected,
This patch teaches GDB to track FP registers (D registers) in prologue
analyzer.
gdb:
2016-10-12 Yao Qi <yao.qi@linaro.org>
PR tdep/20682
* aarch64-tdep.c: Replace 32 with AARCH64_D_REGISTER_COUNT.
(aarch64_analyze_prologue): Extend array 'regs' for D registers.
Assert that operand 0 and 1 can be X or D registers. Update
register number for D registers. Update registers in frame
cache.
* aarch64-tdep.h (AARCH64_D_REGISTER_COUNT): New macro.
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.
This patch adds the support of aarch64-linux process record and reverse
debugging. The implementation is similar to ARM's counterpart.
2015-05-26 Omair Javaid <omair.javaid@linaro.org>
Yao Qi <yao.qi@linaro.org>
* aarch64-linux-tdep.c: Include linux-record.h and
record-full.h.
(struct linux_record_tdep aarch64_linux_record_tdep): Declare.
(aarch64_syscall): New enum.
(aarch64_canonicalize_syscall): New function.
(aarch64_all_but_pc_registers_record): New function.
(aarch64_linux_syscall_record): New function.
(aarch64_linux_init_abi): Install AArch64 process record
handler. Update to handle syscall recording.
* aarch64-tdep.c: Include record.h and record-full.h.
(submask, bit, bits, REG_ALLOC, MEM_ALLOC): New macros.
(struct aarch64_mem_r): Define.
(aarch64_record_result): New enum.
(struct insn_decode_record): Define.
(insn_decode_record): New typedef.
(aarch64_record_data_proc_reg): New function.
(aarch64_record_data_proc_imm): New function.
(aarch64_record_branch_except_sys): New function.
(aarch64_record_load_store): New function.
(aarch64_record_data_proc_simd_fp): New function.
(aarch64_record_asimd_load_store): New function.
(aarch64_record_decode_insn_handler): New function.
(deallocate_reg_mem): New function.
(aarch64_process_record): New function.
* aarch64-tdep.h (struct gdbarch_tdep) <aarch64_syscall_record>:
New field.
(aarch64_process_record): New extern declaration.
* configure.tgt: Add linux-record.o to gdb_target_obs.
* linux-record.h (struct linux_record_tdep) <arg7>: New field.
Current trunk GDB (and gdb-7.8.1 too) fails to build on Aarch64 when
-fno-common is enabled. It fails during link stage due to multiple
definition of `tdesc_aarch64':
...
[ 199s] aarch64-linux-nat.o: In function `initialize_tdesc_aarch64':
[ 199s]
/home/abuild/rpmbuild/BUILD/gdb-7.8.1/gdb/features/aarch64.c:11:
multiple definition of `tdesc_aarch64'
[ 199s]
aarch64-tdep.o:/home/abuild/rpmbuild/BUILD/gdb-7.8.1/gdb/objfiles.h:540:
first defined here
[ 199s] aarch64-linux-nat.o: In function `initialize_tdesc_aarch64':
[ 199s]
/home/abuild/rpmbuild/BUILD/gdb-7.8.1/gdb/features/aarch64.c:11:
multiple definition of `tdesc_aarch64'
[ 199s]
aarch64-tdep.o:/home/abuild/rpmbuild/BUILD/gdb-7.8.1/gdb/objfiles.h:540:
first defined here
[ 199s] collect2: error: ld returned 1 exit status
[ 199s] make[2]: *** [gdb] Error 1
...
This happens because struct target_desc *tdesc_aarch64 is defined in
gdb/features/aarch64.c, which is included by two files
(gdb/aarch64-linux-nat.c and gdb/aarch64-tdep.c).
gdb/Changelog
2015-02-17 Max Ostapenko <m.ostapenko@partner.samsung.com>
PR gdb/17984
* aarch64-linux-nat.c: Don't include features/aarch64.c anymore.
(aarch64_linux_read_description): Remove initialize_tdesc_aarch64
call.
* aarch64-tdep.h (tdesc_aarch64): Declare.
