2004-12-03 Randolph Chung <tausq@debian.org>
* gdbarch.sh (instruction_nullified): Delete. * gdbarch.c: Regenerate. * gdbarch.h: Regenerate. * hppa-tdep.c (hppa_target_read_pc): Adjust pc if instruction is nullified. (hppa_unwind_pc): Likewise. (hppa_instruction_nullified): Delete. (hppa_gdbarch_init): Don't set instruction_nullified method. * infrun.c (infwait_states): Remove infwait_nullified_state. (handle_inferior_event): Remove handling of infwait_nullified_state. Remove handling of nullified instructions. testsuite/ * gdb.arch/pa-nullify.exp: New file. * gdb.arch/pa-nullify.s: New file.
This commit is contained in:
Randolph Chung
parent
e1591da4fd
commit
fe46cd3ab5
@ -1,3 +1,17 @@
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2004-12-03 Randolph Chung <tausq@debian.org>
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* gdbarch.sh (instruction_nullified): Delete.
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* gdbarch.c: Regenerate.
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* gdbarch.h: Regenerate.
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* hppa-tdep.c (hppa_target_read_pc): Adjust pc if instruction is
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nullified.
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(hppa_unwind_pc): Likewise.
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(hppa_instruction_nullified): Delete.
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(hppa_gdbarch_init): Don't set instruction_nullified method.
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* infrun.c (infwait_states): Remove infwait_nullified_state.
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(handle_inferior_event): Remove handling of infwait_nullified_state.
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Remove handling of nullified instructions.
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2004-12-03 Mark Kettenis <kettenis@gnu.org>
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* inf-ttrace.c: Include <sys/mman.h>.
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@ -212,7 +212,6 @@ struct gdbarch
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gdbarch_smash_text_address_ftype *smash_text_address;
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gdbarch_software_single_step_ftype *software_single_step;
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gdbarch_single_step_through_delay_ftype *single_step_through_delay;
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gdbarch_instruction_nullified_ftype *instruction_nullified;
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gdbarch_print_insn_ftype *print_insn;
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gdbarch_skip_trampoline_code_ftype *skip_trampoline_code;
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gdbarch_skip_solib_resolver_ftype *skip_solib_resolver;
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@ -339,7 +338,6 @@ struct gdbarch startup_gdbarch =
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0, /* smash_text_address */
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0, /* software_single_step */
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0, /* single_step_through_delay */
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generic_instruction_nullified, /* instruction_nullified */
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0, /* print_insn */
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0, /* skip_trampoline_code */
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generic_skip_solib_resolver, /* skip_solib_resolver */
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@ -437,7 +435,6 @@ gdbarch_alloc (const struct gdbarch_info *info,
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current_gdbarch->convert_from_func_ptr_addr = convert_from_func_ptr_addr_identity;
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current_gdbarch->addr_bits_remove = core_addr_identity;
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current_gdbarch->smash_text_address = core_addr_identity;
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current_gdbarch->instruction_nullified = generic_instruction_nullified;
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current_gdbarch->skip_trampoline_code = generic_skip_trampoline_code;
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current_gdbarch->skip_solib_resolver = generic_skip_solib_resolver;
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current_gdbarch->in_solib_return_trampoline = generic_in_solib_return_trampoline;
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@ -594,7 +591,6 @@ verify_gdbarch (struct gdbarch *current_gdbarch)
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/* Skip verify of smash_text_address, invalid_p == 0 */
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/* Skip verify of software_single_step, has predicate */
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/* Skip verify of single_step_through_delay, has predicate */
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/* Skip verify of instruction_nullified, invalid_p == 0 */
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if (current_gdbarch->print_insn == 0)
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fprintf_unfiltered (log, "\n\tprint_insn");
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/* Skip verify of skip_trampoline_code, invalid_p == 0 */
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@ -1199,9 +1195,6 @@ gdbarch_dump (struct gdbarch *current_gdbarch, struct ui_file *file)
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fprintf_unfiltered (file,
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"gdbarch_dump: inner_than = <0x%lx>\n",
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(long) current_gdbarch->inner_than);
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fprintf_unfiltered (file,
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"gdbarch_dump: instruction_nullified = <0x%lx>\n",
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(long) current_gdbarch->instruction_nullified);
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#ifdef TARGET_INT_BIT
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fprintf_unfiltered (file,
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"gdbarch_dump: TARGET_INT_BIT # %s\n",
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@ -3372,23 +3365,6 @@ set_gdbarch_single_step_through_delay (struct gdbarch *gdbarch,
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gdbarch->single_step_through_delay = single_step_through_delay;
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}
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int
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gdbarch_instruction_nullified (struct gdbarch *gdbarch, struct regcache *regcache)
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{
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gdb_assert (gdbarch != NULL);
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gdb_assert (gdbarch->instruction_nullified != NULL);
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if (gdbarch_debug >= 2)
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fprintf_unfiltered (gdb_stdlog, "gdbarch_instruction_nullified called\n");
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return gdbarch->instruction_nullified (gdbarch, regcache);
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}
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void
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set_gdbarch_instruction_nullified (struct gdbarch *gdbarch,
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gdbarch_instruction_nullified_ftype instruction_nullified)
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{
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gdbarch->instruction_nullified = instruction_nullified;
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}
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int
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gdbarch_print_insn (struct gdbarch *gdbarch, bfd_vma vma, struct disassemble_info *info)
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{
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@ -1227,16 +1227,6 @@ typedef int (gdbarch_single_step_through_delay_ftype) (struct gdbarch *gdbarch,
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extern int gdbarch_single_step_through_delay (struct gdbarch *gdbarch, struct frame_info *frame);
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extern void set_gdbarch_single_step_through_delay (struct gdbarch *gdbarch, gdbarch_single_step_through_delay_ftype *single_step_through_delay);
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/* On some systems, the PC may be left pointing at an instruction that won't
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actually be executed. This is usually indicated by a bit in the PSW. If
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we find ourselves in such a state, then we step the target beyond the
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nullified instruction before returning control to gdb.
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Return non-zero if the processor is about to execute a nullified instruction. */
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typedef int (gdbarch_instruction_nullified_ftype) (struct gdbarch *gdbarch, struct regcache *regcache);
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extern int gdbarch_instruction_nullified (struct gdbarch *gdbarch, struct regcache *regcache);
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extern void set_gdbarch_instruction_nullified (struct gdbarch *gdbarch, gdbarch_instruction_nullified_ftype *instruction_nullified);
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/* FIXME: cagney/2003-08-28: Need to find a better way of selecting the
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disassembler. Perhaps objdump can handle it? */
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@ -614,12 +614,6 @@ F:=:void:software_single_step:enum target_signal sig, int insert_breakpoints_p:s
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# Return non-zero if the processor is executing a delay slot and a
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# further single-step is needed before the instruction finishes.
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M::int:single_step_through_delay:struct frame_info *frame:frame
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# On some systems, the PC may be left pointing at an instruction that won't
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# actually be executed. This is usually indicated by a bit in the PSW. If
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# we find ourselves in such a state, then we step the target beyond the
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# nullified instruction before returning control to gdb.
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# Return non-zero if the processor is about to execute a nullified instruction.
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m::int:instruction_nullified:struct regcache *regcache:regcache::generic_instruction_nullified::0
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# FIXME: cagney/2003-08-28: Need to find a better way of selecting the
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# disassembler. Perhaps objdump can handle it?
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f:TARGET_PRINT_INSN:int:print_insn:bfd_vma vma, struct disassemble_info *info:vma, info::0:
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@ -1042,6 +1042,8 @@ static CORE_ADDR
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hppa_target_read_pc (ptid_t ptid)
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{
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int flags = read_register_pid (HPPA_FLAGS_REGNUM, ptid);
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ULONGEST ipsw = read_register_pid (HPPA_IPSW_REGNUM, ptid);
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CORE_ADDR pc;
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/* The following test does not belong here. It is OS-specific, and belongs
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in native code. */
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@ -1049,7 +1051,17 @@ hppa_target_read_pc (ptid_t ptid)
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if (flags & 2)
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return read_register_pid (31, ptid) & ~0x3;
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return read_register_pid (HPPA_PCOQ_HEAD_REGNUM, ptid) & ~0x3;
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pc = read_register_pid (HPPA_PCOQ_HEAD_REGNUM, ptid) & ~0x3;
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/* If the current instruction is nullified, then we are effectively
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still executing the previous instruction. Pretend we are still
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there. This is needed when single stepping; if the nullified instruction
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is on a different line, we don't want gdb to think we've stepped onto
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that line. */
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if (ipsw & 0x00200000)
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pc -= 4;
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return pc;
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}
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/* Write out the PC. If currently in a syscall, then also write the new
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@ -2185,7 +2197,21 @@ hppa_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame)
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static CORE_ADDR
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hppa_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
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{
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return frame_unwind_register_signed (next_frame, HPPA_PCOQ_HEAD_REGNUM) & ~3;
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ULONGEST ipsw;
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CORE_ADDR pc;
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ipsw = frame_unwind_register_signed (next_frame, HPPA_IPSW_REGNUM);
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pc = frame_unwind_register_signed (next_frame, HPPA_PCOQ_HEAD_REGNUM) & ~3;
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/* If the current instruction is nullified, then we are effectively
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still executing the previous instruction. Pretend we are still
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there. This is needed when single stepping; if the nullified instruction
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is on a different line, we don't want gdb to think we've stepped onto
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that line. */
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if (ipsw & 0x00200000)
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pc -= 4;
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return pc;
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}
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/* Instead of this nasty cast, add a method pvoid() that prints out a
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@ -2291,22 +2317,6 @@ hppa_pc_requires_run_before_use (CORE_ADDR pc)
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return (!target_has_stack && (pc & 0xFF000000));
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}
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static int
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hppa_instruction_nullified (struct gdbarch *gdbarch, struct regcache *regcache)
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{
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ULONGEST tmp, ipsw, flags;
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regcache_cooked_read (regcache, HPPA_IPSW_REGNUM, &tmp);
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ipsw = extract_unsigned_integer (&tmp,
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register_size (gdbarch, HPPA_IPSW_REGNUM));
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regcache_cooked_read (regcache, HPPA_FLAGS_REGNUM, &tmp);
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flags = extract_unsigned_integer (&tmp,
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register_size (gdbarch, HPPA_FLAGS_REGNUM));
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return ((ipsw & 0x00200000) && !(flags & 0x2));
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}
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/* Return the GDB type object for the "standard" data type of data
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in register N. */
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@ -2573,7 +2583,6 @@ hppa_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
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set_gdbarch_breakpoint_from_pc (gdbarch, hppa_breakpoint_from_pc);
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set_gdbarch_pseudo_register_read (gdbarch, hppa_pseudo_register_read);
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set_gdbarch_instruction_nullified (gdbarch, hppa_instruction_nullified);
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/* Frame unwind methods. */
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set_gdbarch_unwind_dummy_id (gdbarch, hppa_unwind_dummy_id);
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31
gdb/infrun.c
31
gdb/infrun.c
@ -870,7 +870,6 @@ enum infwait_states
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{
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infwait_normal_state,
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infwait_thread_hop_state,
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infwait_nullified_state,
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infwait_nonstep_watch_state
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};
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@ -1263,12 +1262,6 @@ handle_inferior_event (struct execution_control_state *ecs)
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stepped_after_stopped_by_watchpoint = 0;
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break;
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case infwait_nullified_state:
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if (debug_infrun)
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printf_unfiltered ("infrun: infwait_nullified_state\n");
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stepped_after_stopped_by_watchpoint = 0;
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break;
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case infwait_nonstep_watch_state:
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if (debug_infrun)
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printf_unfiltered ("infrun: infwait_nonstep_watch_state\n");
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@ -1730,30 +1723,6 @@ handle_inferior_event (struct execution_control_state *ecs)
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singlestep_breakpoints_inserted_p = 0;
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}
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/* If PC is pointing at a nullified instruction, then step beyond
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it before deciding what to do. This is required when we are stepping
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through a function where the last instruction is a branch with a
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nullified instruction in the delay slot that belongs to the next
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line (which may be in a different function altogether). */
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if (gdbarch_instruction_nullified (current_gdbarch, current_regcache))
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{
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if (debug_infrun)
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printf_unfiltered ("infrun: instruction nullified\n");
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registers_changed ();
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target_resume (ecs->ptid, 1, TARGET_SIGNAL_0);
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/* We may have received a signal that we want to pass to
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the inferior; therefore, we must not clobber the waitstatus
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in WS. */
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ecs->infwait_state = infwait_nullified_state;
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ecs->waiton_ptid = ecs->ptid;
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ecs->wp = &(ecs->tmpstatus);
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prepare_to_wait (ecs);
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return;
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}
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/* It may not be necessary to disable the watchpoint to stop over
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it. For example, the PA can (with some kernel cooperation)
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single step over a watchpoint without disabling the watchpoint. */
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@ -1,3 +1,8 @@
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2004-12-03 Randolph Chung <tausq@debian.org>
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* gdb.arch/pa-nullify.exp: New file.
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* gdb.arch/pa-nullify.s: New file.
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2004-11-30 Randolph Chung <tausq@debian.org>
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* gdb.threads/thread_check.exp: Use ${srcfile} for test program name
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152
gdb/testsuite/gdb.arch/pa-nullify.exp
Normal file
152
gdb/testsuite/gdb.arch/pa-nullify.exp
Normal file
@ -0,0 +1,152 @@
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# Copyright 2004 Free Software Foundation, Inc.
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#
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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 2 of the License, or
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# (at your option) any later version.
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#
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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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#
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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, write to the Free Software
|
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#
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# This file is part of the gdb testsuite.
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if $tracelevel {
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strace $tracelevel
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}
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set prms_id 0
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set bug_id 0
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# Test handling of nullified instructions for the pa target.
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if ![istarget "hppa*-*-*"] then {
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verbose "Skipping hppa nullification tests."
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return
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}
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set testfile "pa-nullify"
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set srcfile ${testfile}.s
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set binfile ${objdir}/${subdir}/${testfile}
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set gcorefile ${objdir}/${subdir}/${testfile}.gcore
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if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {}] != "" } {
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unsupported "Testcase compile failed."
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return -1
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}
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gdb_exit
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gdb_start
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gdb_reinitialize_dir $srcdir/$subdir
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gdb_load ${binfile}
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# In the first test, we do a "step" on a function whose last instruction
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# contains a branch-with-nullify. The instruction in the delay slot belongs
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# to the next function. We verify that when we step off the first function
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# that we end up back at the caller and not at the second instruction.
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gdb_breakpoint foo
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gdb_test "run" "Breakpoint 1, .* in foo.*" "Breakpoint at foo"
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set test "stepi till main"
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gdb_test_multiple "stepi" "${test}" {
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-re ".*in foo.*$gdb_prompt $" {
|
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send_gdb "stepi\n"
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exp_continue -continue_timer
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||||
}
|
||||
-re ".*in bar.*$gdb_prompt $" {
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fail $test
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||||
}
|
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-re ".*in main.*$gdb_prompt $" {
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pass $test
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}
|
||||
}
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||||
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# In the second test, we verify that we can get a proper backtrace
|
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# even when we are in a nullified instruction that belongs to the next function.
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# We also verify that when stepping over a branch-with-nullify insn that we
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# stay on the same insn for two steps.
|
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proc get_addr_of_sym { sym } {
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set addr 0
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||||
global gdb_prompt
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global hex
|
||||
|
||||
set test "get address of $sym"
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send_gdb "print $sym\n"
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gdb_test_multiple "print $sym" $test {
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-re ".*($hex) <$sym>.*$gdb_prompt $" {
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set addr $expect_out(1,string)
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pass $test
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||||
}
|
||||
}
|
||||
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||||
return $addr
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}
|
||||
|
||||
if { ! [ runto_main ] } then { gdb_suppress_tests; }
|
||||
|
||||
set foo [get_addr_of_sym "foo"]
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set bar [get_addr_of_sym "bar"]
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set foo_last [expr $bar - 4]
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gdb_breakpoint "*$foo_last"
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gdb_test "continue" "Breakpoint \[0-9\]*,.* in foo.*"
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gdb_test "backtrace" "in foo.*in main.*" "Backtrace from last insn in foo"
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||||
gdb_test "stepi" "in foo.*" "stepi to nullified instruction stays in foo"
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||||
gdb_test "backtrace" "in foo.*in main.*" "Backtrace from nullified insn"
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||||
gdb_test "stepi" "in main.*" "stepi to main"
|
||||
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||||
# In the third test, we verify that backtraces from nullified instructions
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||||
# work even in coredumps
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||||
|
||||
proc gen_core { test } {
|
||||
global gcorefile
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global gdb_prompt
|
||||
set gcore_works 0
|
||||
set escapedfilename [string_to_regexp $gcorefile]
|
||||
|
||||
gdb_test_multiple "gcore $gcorefile" "$test: gcore" {
|
||||
-re "Saved corefile ${escapedfilename}\[\r\n\]+$gdb_prompt $" {
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pass "$test: gcore"
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||||
set gcore_works 1
|
||||
}
|
||||
-re "Can't create a corefile\[\r\n\]+$gdb_prompt $" {
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||||
fail "$test: gcore"
|
||||
}
|
||||
}
|
||||
|
||||
return $gcore_works
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||||
}
|
||||
|
||||
proc test_core_bt { test } {
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global gcorefile
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||||
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||||
gdb_test "core $gcorefile" "Core was generated by.*" \
|
||||
"$test: load core file" "A program is being debugged already.*" "y"
|
||||
|
||||
gdb_test "backtrace" ".*in foo.*in main.*" "$test: backtrace in gcore"
|
||||
}
|
||||
|
||||
set test "core at last insn in foo"
|
||||
if { ! [ runto_main ] } then { gdb_suppress_tests; }
|
||||
gdb_breakpoint "*$foo_last"
|
||||
gdb_test "continue" "Breakpoint \[0-9\]*,.* in foo.*" "$test: continue to breakpoint"
|
||||
if [gen_core $test] {
|
||||
test_core_bt $test
|
||||
}
|
||||
|
||||
set test "core at nullified insn"
|
||||
if { ! [ runto_main ] } then { gdb_suppress_tests; }
|
||||
gdb_breakpoint "*$foo_last"
|
||||
gdb_test "continue" "Breakpoint \[0-9\]*,.* in foo.*" "$test: continue to breakpoint"
|
||||
gdb_test "stepi" ".*in foo.*" "$test: step to nullified instruction"
|
||||
if [gen_core $test] {
|
||||
test_core_bt $test
|
||||
}
|
||||
59
gdb/testsuite/gdb.arch/pa-nullify.s
Normal file
59
gdb/testsuite/gdb.arch/pa-nullify.s
Normal file
@ -0,0 +1,59 @@
|
||||
.LEVEL 1.1
|
||||
.text
|
||||
.align 4
|
||||
.globl foo
|
||||
.type foo, @function
|
||||
foo:
|
||||
.PROC
|
||||
.CALLINFO FRAME=64,NO_CALLS,SAVE_SP,ENTRY_GR=3
|
||||
.ENTRY
|
||||
copy %r3,%r1
|
||||
copy %r30,%r3
|
||||
stwm %r1,64(%r30)
|
||||
stw %r26,-36(%r3)
|
||||
ldw -36(%r3),%r19
|
||||
copy %r19,%r28
|
||||
ldo 64(%r3),%r30
|
||||
ldwm -64(%r30),%r3
|
||||
bv,n %r0(%r2)
|
||||
.EXIT
|
||||
.PROCEND
|
||||
|
||||
.globl bar
|
||||
.type bar, @function
|
||||
bar:
|
||||
.PROC
|
||||
.CALLINFO FRAME=64,NO_CALLS,SAVE_SP,ENTRY_GR=3
|
||||
.ENTRY
|
||||
copy %r3,%r1
|
||||
copy %r30,%r3
|
||||
stwm %r1,64(%r30)
|
||||
ldo 64(%r3),%r30
|
||||
ldwm -64(%r30),%r3
|
||||
bv,n %r0(%r2)
|
||||
.EXIT
|
||||
.PROCEND
|
||||
|
||||
.globl main
|
||||
.type main, @function
|
||||
main:
|
||||
.PROC
|
||||
.CALLINFO FRAME=64,CALLS,SAVE_RP,SAVE_SP,ENTRY_GR=3
|
||||
.ENTRY
|
||||
stw %r2,-20(%r30)
|
||||
copy %r3,%r1
|
||||
copy %r30,%r3
|
||||
stwm %r1,64(%r30)
|
||||
stw %r26,-36(%r3)
|
||||
stw %r25,-40(%r3)
|
||||
ldw -36(%r3),%r26
|
||||
bl foo,%r2
|
||||
nop
|
||||
copy %r28,%r19
|
||||
copy %r19,%r28
|
||||
ldw -20(%r3),%r2
|
||||
ldo 64(%r3),%r30
|
||||
ldwm -64(%r30),%r3
|
||||
bv,n %r0(%r2)
|
||||
.EXIT
|
||||
.PROCEND
|
||||
Loading…
Reference in New Issue
Block a user