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When setting a syscall catchpoint by name, catch syscalls whose name
or alias matches the requested string.
When the ABI of a system call is changed in the FreeBSD kernel, this
is implemented by leaving a compatibility system call using the old
ABI at the existing "slot" and allocating a new system call for the
version using the new ABI. For example, new fields were added to the
'struct kevent' used by the kevent() system call in FreeBSD 12. The
previous kevent() system call in FreeBSD 12 kernels is now called
freebsd11_kevent() and is still used by older binaries compiled
against the older ABI. The freebsd11_kevent() system call can be
tagged with an "alias" attribute of "kevent" permitting 'catch syscall
kevent' to catch both system calls and providing the expected user
behavior for both old and new binaries. It also provides the expected
behavior if GDB is compiled on an older host (such as a FreeBSD 11
host).
gdb/ChangeLog:
* NEWS: Add entry documenting system call aliases.
* break-catch-syscall.c (catch_syscall_split_args): Pass 'result'
to get_syscalls_by_name.
* gdbarch.sh (UNKNOWN_SYSCALL): Remove.
* gdbarch.h: Regenerate.
* syscalls/gdb-syscalls.dtd (syscall): Add alias attribute.
* xml-syscall.c [!HAVE_LIBEXPAT] (get_syscalls_by_name): Rename
from get_syscall_by_name. Now accepts a pointer to a vector of
integers and returns a bool.
[HAVE_LIBEXPAT] (struct syscall_desc): Add alias member.
(syscall_create_syscall_desc): Add alias parameter and pass it to
syscall_desc constructor.
(syscall_start_syscall): Handle alias attribute.
(syscall_attr): Add alias attribute.
(xml_get_syscalls_by_name): Rename from xml_get_syscall_number.
Now accepts a pointer to a vector of integers and returns a
bool. Add syscalls whose alias or name matches the requested
name.
(get_syscalls_by_name): Rename from get_syscall_by_name. Now
accepts a pointer to a vector of integers and returns a bool.
* xml-syscall.h (get_syscalls_by_name): Likewise.
gdb/doc/ChangeLog:
* gdb.texinfo (Set Catchpoints): Add an anchor for 'catch syscall'.
(Native): Add a FreeBSD subsection.
(FreeBSD): Document use of system call aliases for compatibility
system calls.
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gdb/ChangeLog:
* aarch64-tdep.c (aarch64_push_dummy_call): Replace arg with
return_method.
* alpha-tdep.c (alpha_push_dummy_call): Likewise.
* amd64-tdep.c (amd64_push_arguments): Likewise.
(amd64_push_dummy_call): Likewise.
* amd64-windows-tdep.c (amd64_windows_push_arguments): Likewise.
* arc-tdep.c (arc_push_dummy_call): Likewise.
* arm-tdep.c (arm_push_dummy_call): Likewise.
* avr-tdep.c (avr_push_dummy_call): Likewise.
* bfin-tdep.c (bfin_push_dummy_call): Likewise.
* cris-tdep.c (cris_push_dummy_call): Likewise.
* csky-tdep.c (csky_push_dummy_call): Likewise.
* frv-tdep.c (frv_push_dummy_call): Likewise.
* gdbarch.c: Regenerate.
* gdbarch.h: Regenerate.
* gdbarch.sh (gdbarch_push_dummy_call): Replace arg with
return_method.
* h8300-tdep.c (h8300_push_dummy_call): Likewise.
* hppa-tdep.c (hppa32_push_dummy_call): Likewise.
(hppa64_push_dummy_call): Likewise.
* i386-darwin-tdep.c (i386_darwin_push_dummy_call): Likewise.
* i386-tdep.c (i386_push_dummy_call): Likewise.
* ia64-tdep.c (ia64_push_dummy_call): Likewise.
* infcall.c (call_function_by_hand_dummy): Likewise.
* iq2000-tdep.c (iq2000_push_dummy_call): Likewise.
* lm32-tdep.c (lm32_push_dummy_call): Likewise.
* m32c-tdep.c (m32c_push_dummy_call): Likewise.
* m32r-tdep.c (m32r_push_dummy_call): Likewise.
* m68hc11-tdep.c (m68hc11_push_dummy_call): Likewise.
* m68k-tdep.c (m68k_push_dummy_call): Likewise.
* mep-tdep.c (mep_push_dummy_call): Likewise.
* mips-tdep.c (mips_eabi_push_dummy_call): Likewise.
(mips_n32n64_push_dummy_call): Likewise.
(mips_o32_push_dummy_call): Likewise.
(mips_o64_push_dummy_call): Likewise.
* mn10300-tdep.c (mn10300_push_dummy_call): Likewise.
* msp430-tdep.c (msp430_push_dummy_call): Likewise.
* nds32-tdep.c (nds32_push_dummy_call): Likewise.
* nios2-tdep.c (nios2_push_dummy_call): Likewise.
* or1k-tdep.c (or1k_push_dummy_call): Likewise.
* ppc-sysv-tdep.c (ppc_sysv_abi_push_dummy_call): Likewise.
(ppc64_sysv_abi_push_dummy_call): Likewise.
* ppc-tdep.h (ppc_sysv_abi_push_dummy_call): Likewise.
(ppc64_sysv_abi_push_dummy_call): Likewise.
* riscv-tdep.c (riscv_push_dummy_call): Likewise.
* rl78-tdep.c (rl78_push_dummy_call): Likewise.
* rs6000-aix-tdep.c (rs6000_push_dummy_call): Likewise.
* rs6000-lynx178-tdep.c (rs6000_lynx178_push_dummy_call): Likewise.
* rx-tdep.c (rx_push_dummy_call): Likewise.
* s390-tdep.c (s390_push_dummy_call): Likewise.
* score-tdep.c (score_push_dummy_call): Likewise.
* sh-tdep.c (sh_push_dummy_call_fpu): Likewise.
(sh_push_dummy_call_nofpu): Likewise.
* sparc-tdep.c (sparc32_store_arguments): Likewise.
(sparc32_push_dummy_call): Likewise.
* sparc64-tdep.c (sparc64_store_arguments): Likewise.
(sparc64_push_dummy_call): Likewise.
* spu-tdep.c (spu_push_dummy_call): Likewise.
* tic6x-tdep.c (tic6x_push_dummy_call): Likewise.
* tilegx-tdep.c (tilegx_push_dummy_call): Likewise.
* v850-tdep.c (v850_push_dummy_call): Likewise.
* vax-tdep.c (vax_push_dummy_call): Likewise.
* xstormy16-tdep.c (xstormy16_push_dummy_call): Likewise.
* xtensa-tdep.c (xtensa_push_dummy_call): Likewise.
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In call_function_by_hand_dummy, struct_return and hidden_first_param_p
are used to represent a single concept. Replace with an enum.
gdb/ChangeLog:
* gdbarch.sh (enum function_call_return_method): Add enum.
* gdbarch.h: Regenerate.
* infcall.c (call_function_by_hand_dummy): Replace vars with enum.
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The expression
gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch)
is used quite often to find the number of cooked registers (raw + pseudo
registers). This patch introduces gdbarch_num_cooked_regs, which does
the equivalent. It substantially reduces required wrapping in some
places, so should improve readability.
There is a for loop in m68hc11_frame_unwind_cache that had iterated
until (the equivalent of) gdbarch_num_cooked_regs (gdbarch) - 1. During
review, we concluded that this is most likely an off-by-one mistake, so
I replaced it with gdbarch_num_cooked_regs (gdbarch).
gdb/ChangeLog:
* gdbarch.sh (gdbarch_num_cooked_regs): New.
* gdbarch.h: Re-generate.
* ax-gdb.c (gen_expr): Use gdbarch_num_cooked_regs.
* dwarf2-frame.c (dwarf2_frame_cache): Likewise.
* eval.c (evaluate_subexp_standard): Likewise.
* findvar.c (value_of_register): Likewise.
(value_of_register_lazy): Likewise.
(address_from_register): Likewise.
* frame.c (get_frame_register_bytes): Likewise.
* gdbarch-selftests.c (register_to_value_test): Likewise.
* h8300-tdep.c (h8300_register_type): Likewise.
* i386-tdep.c (i386_dbx_reg_to_regnum): Likewise.
(i386_svr4_reg_to_regnum): Likewise.
* infcmd.c (default_print_registers_info): Likewise.
(registers_info): Likewise.
(print_vector_info): Likewise.
(default_print_float_info): Likewise.
* m68hc11-tdep.c (m68hc11_frame_unwind_cache): Likewise.
* mdebugread.c (mdebug_reg_to_regnum): Likewise.
* mi/mi-main.c (mi_cmd_data_list_register_names): Likewise.
(mi_cmd_data_list_changed_registers): Likewise.
(mi_cmd_data_list_register_values): Likewise.
(mi_cmd_data_write_register_values): Likewise.
(mi_cmd_trace_frame_collected): Likewise.
* mips-tdep.c (print_gp_register_row): Likewise.
(mips_print_registers_info): Likewise.
* nds32-tdep.c (nds32_gdbarch_init): Likewise.
* regcache.c (init_regcache_descr): Likewise.
(register_size): Likewise.
(register_dump::dump): Likewise.
(cooked_read_test): Likewise.
(cooked_write_test): Likewise.
* rs6000-tdep.c (rs6000_register_sim_regno): Likewise.
(rs6000_gdbarch_init): Likewise.
* stabsread.c (stab_reg_to_regnum): Likewise.
* stack.c (info_frame_command): Likewise.
* target-descriptions.c (tdesc_register_name): Likewise.
* trad-frame.c (trad_frame_alloc_saved_regs): Likewise.
* tui/tui-regs.c (tui_show_register_group): Likewise.
* user-regs.c (user_reg_map_name_to_regnum): Likewise.
(user_reg_map_regnum_to_name): Likewise.
(value_of_user_reg): Likewise.
(maintenance_print_user_registers): Likewise.
* xtensa-tdep.c (xtensa_find_register_by_name): Likewise.
(xtensa_register_name): Likewise.
(xtensa_register_type): Likewise.
(xtensa_reg_to_regnum): Likewise.
(xtensa_pseudo_register_read): Likewise.
(xtensa_pseudo_register_write): Likewise.
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The previous commit included a stale gdbarch.h from an earlier version
of that patch by mistake.
gdb/ChangeLog:
2018-08-31 Pedro Alves <palves@redhat.com>
* gdbarch.h: Regenerate.
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These weren't described anywhere in the sources.
gdb/ChangeLog:
2018-08-31 Pedro Alves <palves@redhat.com>
* gdbarch.sh (have_nonsteppable_watchpoint): Add comment.
* target.h (Hardware watchpoint interfaces): Describe
continuable/steppable/non-steppable watchpoints.
* gdbarch.h, gdbarch.c: Regenerate.
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In the existing code, when using the regset section iteration functions, the
size parameter is used in different ways.
With collect, size is used to create the buffer in which to write the regset.
(see linux-tdep.c::linux_collect_regset_section_cb).
With supply, size is used to confirm the existing regset is the correct size.
If REGSET_VARIABLE_SIZE is set then the regset can be bigger than size.
Effectively, size is the minimum possible size of the regset.
(see corelow.c::get_core_register_section).
There are currently no targets with both REGSET_VARIABLE_SIZE and a collect
function.
In SVE, a corefile can contain one of two formats after the header, both of
which are different sizes. However, when writing a core file, we always want
to write out the full bigger size.
To allow support of collects for REGSET_VARIABLE_SIZE we need two sizes.
This is done by adding supply_size and collect_size.
gdb/
* aarch64-fbsd-tdep.c
(aarch64_fbsd_iterate_over_regset_sections): Add supply_size and
collect_size.
* aarch64-linux-tdep.c
(aarch64_linux_iterate_over_regset_sections): Likewise.
* alpha-linux-tdep.c
(alpha_linux_iterate_over_regset_sections):
* alpha-nbsd-tdep.c
(alphanbsd_iterate_over_regset_sections): Likewise.
* amd64-fbsd-tdep.c
(amd64fbsd_iterate_over_regset_sections): Likewise.
* amd64-linux-tdep.c
(amd64_linux_iterate_over_regset_sections): Likewise.
* arm-bsd-tdep.c
(armbsd_iterate_over_regset_sections): Likewise.
* arm-fbsd-tdep.c
(arm_fbsd_iterate_over_regset_sections): Likewise.
* arm-linux-tdep.c
(arm_linux_iterate_over_regset_sections): Likewise.
* corelow.c (get_core_registers_cb): Likewise.
(core_target::fetch_registers): Likewise.
* fbsd-tdep.c (fbsd_collect_regset_section_cb): Likewise.
* frv-linux-tdep.c (frv_linux_iterate_over_regset_sections): Likewise.
* gdbarch.h (void): Regenerate.
* gdbarch.sh: Add supply_size and collect_size.
* hppa-linux-tdep.c (hppa_linux_iterate_over_regset_sections): Likewise.
* hppa-nbsd-tdep.c (hppanbsd_iterate_over_regset_sections): Likewise.
* hppa-obsd-tdep.c (hppaobsd_iterate_over_regset_sections): Likewise.
* i386-fbsd-tdep.c (i386fbsd_iterate_over_regset_sections): Likewise.
* i386-linux-tdep.c (i386_linux_iterate_over_regset_sections): Likewise.
* i386-tdep.c (i386_iterate_over_regset_sections): Likewise.
* ia64-linux-tdep.c (ia64_linux_iterate_over_regset_sections): Likewise.
* linux-tdep.c (linux_collect_regset_section_cb): Likewise.
* m32r-linux-tdep.c (m32r_linux_iterate_over_regset_sections): Likewise.
* m68k-bsd-tdep.c (m68kbsd_iterate_over_regset_sections): Likewise.
* m68k-linux-tdep.c (m68k_linux_iterate_over_regset_sections): Likewise.
* mips-fbsd-tdep.c (mips_fbsd_iterate_over_regset_sections): Likewise.
* mips-linux-tdep.c (mips_linux_iterate_over_regset_sections): Likewise.
* mips-nbsd-tdep.c (mipsnbsd_iterate_over_regset_sections): Likewise.
* mips64-obsd-tdep.c (mips64obsd_iterate_over_regset_sections): Likewise.
* mn10300-linux-tdep.c (am33_iterate_over_regset_sections): Likewise.
* nios2-linux-tdep.c (nios2_iterate_over_regset_sections): Likewise.
* ppc-fbsd-tdep.c (ppcfbsd_iterate_over_regset_sections): Likewise.
* ppc-linux-tdep.c (ppc_linux_iterate_over_regset_sections): Likewise.
* ppc-nbsd-tdep.c (ppcnbsd_iterate_over_regset_sections): Likewise.
* ppc-obsd-tdep.c (ppcobsd_iterate_over_regset_sections): Likewise.
* riscv-linux-tdep.c (riscv_linux_iterate_over_regset_sections): Likewise.
* rs6000-aix-tdep.c (rs6000_aix_iterate_over_regset_sections): Likewise.
* s390-linux-tdep.c (s390_iterate_over_regset_sections): Likewise.
* score-tdep.c (score7_linux_iterate_over_regset_sections): Likewise.
* sh-tdep.c (sh_iterate_over_regset_sections): Likewise.
* sparc-tdep.c (sparc_iterate_over_regset_sections): Likewise.
* tilegx-linux-tdep.c (tilegx_iterate_over_regset_sections): Likewise.
* vax-tdep.c (vax_iterate_over_regset_sections): Likewise.
* xtensa-tdep.c (xtensa_iterate_over_regset_sections): Likewise.
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Implement MIPS target support for passing options to the disassembler,
complementing commit 65b48a81404c ("GDB: Add support for the new
set/show disassembler-options commands.").
This includes options that expect an argument, so adjust the generic
code and data structures used so as to handle such options. So as to
give backends syntax flexibility no specific delimiter has been defined
to separate options from their respective arguments, so it has to be
included as the last character of the option name. Completion code
however has not been adjusted and consequently option arguments cannot
be completed at this time.
Also the MIPS target has non-empty defaults for the options, so that ABI
names for the general-purpose registers respect our `set mips abi ...'
setting rather than always being determined from the ELF headers of the
binary file selected. Handle these defaults as implicit options, never
shown to the user and always prepended to the user-specified options, so
that the latters can override the defaults.
The resulting output for the MIPS target is as follows:
(gdb) show disassembler-options
The current disassembler options are ''
The following disassembler options are supported for use with the
'set disassembler-options <option>[,<option>...]' command:
no-aliases Use canonical instruction forms.
msa Recognize MSA instructions.
virt Recognize the virtualization ASE instructions.
xpa Recognize the eXtended Physical Address (XPA) ASE
instructions.
ginv Recognize the Global INValidate (GINV) ASE instructions.
gpr-names=ABI Print GPR names according to specified ABI.
Default: based on binary being disassembled.
fpr-names=ABI Print FPR names according to specified ABI.
Default: numeric.
cp0-names=ARCH Print CP0 register names according to specified architecture.
Default: based on binary being disassembled.
hwr-names=ARCH Print HWR names according to specified architecture.
Default: based on binary being disassembled.
reg-names=ABI Print GPR and FPR names according to specified ABI.
reg-names=ARCH Print CP0 register and HWR names according to specified
architecture.
For the options above, the following values are supported for "ABI":
numeric 32 n32 64
For the options above, the following values are supported for "ARCH":
numeric r3000 r3900 r4000 r4010 vr4100 vr4111 vr4120 r4300 r4400 r4600
r4650 r5000 vr5400 vr5500 r5900 r6000 rm7000 rm9000 r8000 r10000 r12000
r14000 r16000 mips5 mips32 mips32r2 mips32r3 mips32r5 mips32r6 mips64
mips64r2 mips64r3 mips64r5 mips64r6 interaptiv-mr2 sb1 loongson2e
loongson2f loongson3a octeon octeon+ octeon2 octeon3 xlr xlp
(gdb)
which corresponds to what `objdump --help' used to print for the MIPS
target, with minor formatting changes, most notably option argument
lists being wrapped, but also the amount of white space separating
options from the respective descriptions. The relevant part the new
code is now also used by `objdump --help', which means these formatting
changes apply to both outputs, except for argument list wrapping, which
is GDB-specific.
This also adds a separating new line between the heading and option
lists where descriptions are provided, hence:
(gdb) set architecture s390:31-bit
(gdb) show disassembler-options
The current disassembler options are ''
The following disassembler options are supported for use with the
'set disassembler-options <option>[,<option>...]' command:
esa Disassemble in ESA architecture mode
zarch Disassemble in z/Architecture mode
insnlength Print unknown instructions according to length from first two bits
(gdb)
but:
(gdb) set architecture powerpc:common
(gdb) show disassembler-options
The current disassembler options are ''
The following disassembler options are supported for use with the
'set disassembler-options <option>[,<option>...]' command:
403, 405, 440, 464, 476, 601, 603, 604, 620, 7400, 7410, 7450, 7455, 750cl,
821, 850, 860, a2, altivec, any, booke, booke32, cell, com, e200z4, e300,
e500, e500mc, e500mc64, e5500, e6500, e500x2, efs, efs2, power4, power5,
power6, power7, power8, power9, ppc, ppc32, 32, ppc64, 64, ppc64bridge,
ppcps, pwr, pwr2, pwr4, pwr5, pwr5x, pwr6, pwr7, pwr8, pwr9, pwrx, raw, spe,
spe2, titan, vle, vsx
(gdb)
Existing affected target backends have been adjusted accordingly.
This has been verified manually with:
(gdb) set architecture arm
(gdb) set architecture powerpc:common
(gdb) set architecture s390:31-bit
to cause no issues with the `show disassembler-options' and `set
disassembler-options' commands. A test case for the MIPS target has
also been provided, covering the default settings with ABI overrides as
well as disassembler option overrides.
2018-07-02 Maciej W. Rozycki <macro@mips.com>
Simon Marchi <simon.marchi@polymtl.ca>
include/
PR tdep/8282
* dis-asm.h (disasm_option_arg_t): New typedef.
(disasm_options_and_args_t): Likewise.
(disasm_options_t): Add `arg' member, document members.
(disassembler_options_mips): New prototype.
(disassembler_options_arm, disassembler_options_powerpc)
(disassembler_options_s390): Update prototypes.
opcodes/
PR tdep/8282
* mips-dis.c (mips_option_arg_t): New enumeration.
(mips_options): New variable.
(disassembler_options_mips): New function.
(print_mips_disassembler_options): Reimplement in terms of
`disassembler_options_mips'.
* arm-dis.c (disassembler_options_arm): Adapt to using the
`disasm_options_and_args_t' structure.
* ppc-dis.c (disassembler_options_powerpc): Likewise.
* s390-dis.c (disassembler_options_s390): Likewise.
gdb/
PR tdep/8282
* disasm.h (gdb_disassembler): Add
`m_disassembler_options_holder'. member
* disasm.c (get_all_disassembler_options): New function.
(gdb_disassembler::gdb_disassembler): Use it.
(gdb_buffered_insn_length_init_dis): Likewise.
(gdb_buffered_insn_length): Adjust accordingly.
(set_disassembler_options): Handle options with arguments.
(show_disassembler_options_sfunc): Likewise. Add a leading new
line if showing options with descriptions.
(disassembler_options_completer): Adapt to using the
`disasm_options_and_args_t' structure.
* mips-tdep.c (mips_disassembler_options): New variable.
(mips_disassembler_options_o32): Likewise.
(mips_disassembler_options_n32): Likewise.
(mips_disassembler_options_n64): Likewise.
(gdb_print_insn_mips): Don't set `disassembler_options'.
(gdb_print_insn_mips_n32, gdb_print_insn_mips_n64): Remove
functions.
(mips_gdbarch_init): Always set `gdbarch_print_insn' to
`gdb_print_insn_mips'. Set `gdbarch_disassembler_options',
`gdbarch_disassembler_options_implicit' and
`gdbarch_valid_disassembler_options'.
* arm-tdep.c (_initialize_arm_tdep): Adapt to using the
`disasm_options_and_args_t' structure.
* gdbarch.sh (disassembler_options_implicit): New `gdbarch'
method.
(valid_disassembler_options): Switch from `disasm_options_t' to
the `disasm_options_and_args_t' structure.
* NEWS: Document `set disassembler-options' support for the MIPS
target.
* gdbarch.h: Regenerate.
* gdbarch.c: Regenerate.
gdb/doc/
PR tdep/8282
* gdb.texinfo (Source and Machine Code): Document `set
disassembler-options' support for the MIPS target.
gdb/testsuite/
PR tdep/8282
* gdb.arch/mips-disassembler-options.exp: New test.
* gdb.arch/mips-disassembler-options.s: New test source.
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This is more preparation bits for multi-target support.
In a multi-target scenario, we need to address the case of different
processes/threads running on different targets that happen to have the
same PID/PTID. E.g., we can have both process 123 in target 1, and
process 123 in target 2, while they're in reality different processes
running on different machines. Or maybe we've loaded multiple
instances of the same core file. Etc.
To address this, in my WIP multi-target branch, threads and processes
are uniquely identified by the (process_stratum target_ops *, ptid_t)
and (process_stratum target_ops *, pid) tuples respectively. I.e.,
each process_stratum instance has its own thread/process number space.
As you can imagine, that requires passing around target_ops * pointers
in a number of functions where we're currently passing only a ptid_t
or an int. E.g., when we look up a thread_info object by ptid_t in
find_thread_ptid, the ptid_t alone isn't sufficient.
In many cases though, we already have the thread_info or inferior
pointer handy, but we "lose" it somewhere along the call stack, only
to look it up again by ptid_t/pid. Since thread_info or inferior
objects know their parent target, if we pass around thread_info or
inferior pointers when possible, we avoid having to add extra
target_ops parameters to many functions, and also, we eliminate a
number of by ptid_t/int lookups.
So that's what this patch does. In a bit more detail:
- Changes a number of functions and methods to take a thread_info or
inferior pointer instead of a ptid_t or int parameter.
- Changes a number of structure fields from ptid_t/int to inferior or
thread_info pointers.
- Uses the inferior_thread() function whenever possible instead of
inferior_ptid.
- Uses thread_info pointers directly when possible instead of the
is_running/is_stopped etc. routines that require a lookup.
- A number of functions are eliminated along the way, such as:
int valid_gdb_inferior_id (int num);
int pid_to_gdb_inferior_id (int pid);
int gdb_inferior_id_to_pid (int num);
int in_inferior_list (int pid);
- A few structures and places hold a thread_info pointer across
inferior execution, so now they take a strong reference to the
(refcounted) thread_info object to avoid the thread_info pointer
getting stale. This is done in enable_thread_stack_temporaries and
in the infcall.c code.
- Related, there's a spot in infcall.c where using a RAII object to
handle the refcount would be handy, so a gdb::ref_ptr specialization
for thread_info is added (thread_info_ref, in gdbthread.h), along
with a gdb_ref_ptr policy that works for all refcounted_object types
(in common/refcounted-object.h).
gdb/ChangeLog:
2018-06-21 Pedro Alves <palves@redhat.com>
* ada-lang.h (ada_get_task_number): Take a thread_info pointer
instead of a ptid_t. All callers adjusted.
* ada-tasks.c (ada_get_task_number): Likewise. All callers
adjusted.
(print_ada_task_info, display_current_task_id, task_command_1):
Adjust.
* breakpoint.c (watchpoint_in_thread_scope): Adjust to use
inferior_thread.
(breakpoint_kind): Adjust.
(remove_breakpoints_pid): Rename to ...
(remove_breakpoints_inf): ... this. Adjust to take an inferior
pointer. All callers adjusted.
(bpstat_clear_actions): Use inferior_thread.
(get_bpstat_thread): New.
(bpstat_do_actions): Use it.
(bpstat_check_breakpoint_conditions, bpstat_stop_status): Adjust
to take a thread_info pointer. All callers adjusted.
(set_longjmp_breakpoint_for_call_dummy, set_momentary_breakpoint)
(breakpoint_re_set_thread): Use inferior_thread.
* breakpoint.h (struct inferior): Forward declare.
(bpstat_stop_status): Update.
(remove_breakpoints_pid): Delete.
(remove_breakpoints_inf): New.
* bsd-uthread.c (bsd_uthread_target::wait)
(bsd_uthread_target::update_thread_list): Use find_thread_ptid.
* btrace.c (btrace_add_pc, btrace_enable, btrace_fetch)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd): Adjust.
(maint_btrace_clear_cmd, maint_info_btrace_cmd): Adjust to use
inferior_thread.
* cli/cli-interp.c: Include "inferior.h".
* common/refcounted-object.h (struct
refcounted_object_ref_policy): New.
* compile/compile-object-load.c: Include gdbthread.h.
(store_regs): Use inferior_thread.
* corelow.c (core_target::close): Use current_inferior.
(core_target_open): Adjust to use first_thread_of_inferior and use
the current inferior.
* ctf.c (ctf_target::close): Adjust to use current_inferior.
* dummy-frame.c (dummy_frame_id) <ptid>: Delete, replaced by ...
<thread>: ... this new field. All references adjusted.
(dummy_frame_pop, dummy_frame_discard, register_dummy_frame_dtor):
Take a thread_info pointer instead of a ptid_t.
* dummy-frame.h (dummy_frame_push, dummy_frame_pop)
(dummy_frame_discard, register_dummy_frame_dtor): Take a
thread_info pointer instead of a ptid_t.
* elfread.c: Include "inferior.h".
(elf_gnu_ifunc_resolver_stop, elf_gnu_ifunc_resolver_return_stop):
Use inferior_thread.
* eval.c (evaluate_subexp): Likewise.
* frame.c (frame_pop, has_stack_frames, find_frame_sal): Use
inferior_thread.
* gdb_proc_service.h (struct thread_info): Forward declare.
(struct ps_prochandle) <ptid>: Delete, replaced by ...
<thread>: ... this new field. All references adjusted.
* gdbarch.h, gdbarch.c: Regenerate.
* gdbarch.sh (get_syscall_number): Replace 'ptid' parameter with a
'thread' parameter. All implementations and callers adjusted.
* gdbthread.h (thread_info) <set_running>: New method.
(delete_thread, delete_thread_silent): Take a thread_info pointer
instead of a ptid.
(global_thread_id_to_ptid, ptid_to_global_thread_id): Delete.
(first_thread_of_process): Delete, replaced by ...
(first_thread_of_inferior): ... this new function. All callers
adjusted.
(any_live_thread_of_process): Delete, replaced by ...
(any_live_thread_of_inferior): ... this new function. All callers
adjusted.
(switch_to_thread, switch_to_no_thread): Declare.
(is_executing): Delete.
(enable_thread_stack_temporaries): Update comment.
<enable_thread_stack_temporaries>: Take a thread_info pointer
instead of a ptid_t. Incref the thread.
<~enable_thread_stack_temporaries>: Decref the thread.
<m_ptid>: Delete
<m_thr>: New.
(thread_stack_temporaries_enabled_p, push_thread_stack_temporary)
(get_last_thread_stack_temporary)
(value_in_thread_stack_temporaries, can_access_registers_thread):
Take a thread_info pointer instead of a ptid_t. All callers
adjusted.
* infcall.c (get_call_return_value): Use inferior_thread.
(run_inferior_call): Work with thread pointers instead of ptid_t.
(call_function_by_hand_dummy): Work with thread pointers instead
of ptid_t. Use thread_info_ref.
* infcmd.c (proceed_thread_callback): Access thread's state
directly.
(ensure_valid_thread, ensure_not_running): Use inferior_thread,
access thread's state directly.
(continue_command): Use inferior_thread.
(info_program_command): Use find_thread_ptid and access thread
state directly.
(proceed_after_attach_callback): Use thread state directly.
(notice_new_inferior): Take a thread_info pointer instead of a
ptid_t. All callers adjusted.
(exit_inferior): Take an inferior pointer instead of a pid. All
callers adjusted.
(exit_inferior_silent): New.
(detach_inferior): Delete.
(valid_gdb_inferior_id, pid_to_gdb_inferior_id)
(gdb_inferior_id_to_pid, in_inferior_list): Delete.
(detach_inferior_command, kill_inferior_command): Use
find_inferior_id instead of valid_gdb_inferior_id and
gdb_inferior_id_to_pid.
(inferior_command): Use inferior and thread pointers.
* inferior.h (struct thread_info): Forward declare.
(notice_new_inferior): Take a thread_info pointer instead of a
ptid_t. All callers adjusted.
(detach_inferior): Delete declaration.
(exit_inferior, exit_inferior_silent): Take an inferior pointer
instead of a pid. All callers adjusted.
(gdb_inferior_id_to_pid, pid_to_gdb_inferior_id, in_inferior_list)
(valid_gdb_inferior_id): Delete.
* infrun.c (follow_fork_inferior, proceed_after_vfork_done)
(handle_vfork_child_exec_or_exit, follow_exec): Adjust.
(struct displaced_step_inferior_state) <pid>: Delete, replaced by
...
<inf>: ... this new field.
<step_ptid>: Delete, replaced by ...
<step_thread>: ... this new field.
(get_displaced_stepping_state): Take an inferior pointer instead
of a pid. All callers adjusted.
(displaced_step_in_progress_any_inferior): Adjust.
(displaced_step_in_progress_thread): Take a thread pointer instead
of a ptid_t. All callers adjusted.
(displaced_step_in_progress, add_displaced_stepping_state): Take
an inferior pointer instead of a pid. All callers adjusted.
(get_displaced_step_closure_by_addr): Adjust.
(remove_displaced_stepping_state): Take an inferior pointer
instead of a pid. All callers adjusted.
(displaced_step_prepare_throw, displaced_step_prepare)
(displaced_step_fixup): Take a thread pointer instead of a ptid_t.
All callers adjusted.
(start_step_over): Adjust.
(infrun_thread_ptid_changed): Remove bit updating ptids in the
displaced step queue.
(do_target_resume): Adjust.
(fetch_inferior_event): Use inferior_thread.
(context_switch, get_inferior_stop_soon): Take an
execution_control_state pointer instead of a ptid_t. All callers
adjusted.
(switch_to_thread_cleanup): Delete.
(stop_all_threads): Use scoped_restore_current_thread.
* inline-frame.c: Include "gdbthread.h".
(inline_state) <inline_state>: Take a thread pointer instead of a
ptid_t. All callers adjusted.
<ptid>: Delete, replaced by ...
<thread>: ... this new field.
(find_inline_frame_state): Take a thread pointer instead of a
ptid_t. All callers adjusted.
(skip_inline_frames, step_into_inline_frame)
(inline_skipped_frames, inline_skipped_symbol): Take a thread
pointer instead of a ptid_t. All callers adjusted.
* inline-frame.h (skip_inline_frames, step_into_inline_frame)
(inline_skipped_frames, inline_skipped_symbol): Likewise.
* linux-fork.c (delete_checkpoint_command): Adjust to use thread
pointers directly.
* linux-nat.c (get_detach_signal): Likewise.
* linux-thread-db.c (thread_from_lwp): New 'stopped' parameter.
(thread_db_notice_clone): Adjust.
(thread_db_find_new_threads_silently)
(thread_db_find_new_threads_2, thread_db_find_new_threads_1): Take
a thread pointer instead of a ptid_t. All callers adjusted.
* mi/mi-cmd-var.c: Include "inferior.h".
(mi_cmd_var_update_iter): Update to use thread pointers.
* mi/mi-interp.c (mi_new_thread): Update to use the thread's
inferior directly.
(mi_output_running_pid, mi_inferior_count): Delete, bits factored
out to ...
(mi_output_running): ... this new function.
(mi_on_resume_1): Adjust to use it.
(mi_user_selected_context_changed): Adjust to use inferior_thread.
* mi/mi-main.c (proceed_thread): Adjust to use thread pointers
directly.
(interrupt_thread_callback): : Adjust to use thread and inferior
pointers.
* proc-service.c: Include "gdbthread.h".
(ps_pglobal_lookup): Adjust to use the thread's inferior directly.
* progspace-and-thread.c: Include "inferior.h".
* progspace.c: Include "inferior.h".
* python/py-exitedevent.c (create_exited_event_object): Adjust to
hold a reference to an inferior_object.
* python/py-finishbreakpoint.c (bpfinishpy_init): Adjust to use
inferior_thread.
* python/py-inferior.c (struct inferior_object): Give the type a
tag name instead of a typedef.
(python_on_normal_stop): No need to check if the current thread is
listed.
(inferior_to_inferior_object): Change return type to
inferior_object. All callers adjusted.
(find_thread_object): Delete, bits factored out to ...
(thread_to_thread_object): ... this new function.
* python/py-infthread.c (create_thread_object): Use
inferior_to_inferior_object.
(thpy_is_stopped): Use thread pointer directly.
(gdbpy_selected_thread): Use inferior_thread.
* python/py-record-btrace.c (btpy_list_object) <ptid>: Delete
field, replaced with ...
<thread>: ... this new field. All users adjusted.
(btpy_insn_or_gap_new): Drop const.
(btpy_list_new): Take a thread pointer instead of a ptid_t. All
callers adjusted.
* python/py-record.c: Include "gdbthread.h".
(recpy_insn_new, recpy_func_new): Take a thread pointer instead of
a ptid_t. All callers adjusted.
(gdbpy_current_recording): Use inferior_thread.
* python/py-record.h (recpy_record_object) <ptid>: Delete
field, replaced with ...
<thread>: ... this new field. All users adjusted.
(recpy_element_object) <ptid>: Delete
field, replaced with ...
<thread>: ... this new field. All users adjusted.
(recpy_insn_new, recpy_func_new): Take a thread pointer instead of
a ptid_t. All callers adjusted.
* python/py-threadevent.c: Include "gdbthread.h".
(get_event_thread): Use thread_to_thread_object.
* python/python-internal.h (struct inferior_object): Forward
declare.
(find_thread_object, find_inferior_object): Delete declarations.
(thread_to_thread_object, inferior_to_inferior_object): New
declarations.
* record-btrace.c: Include "inferior.h".
(require_btrace_thread): Use inferior_thread.
(record_btrace_frame_sniffer)
(record_btrace_tailcall_frame_sniffer): Use inferior_thread.
(get_thread_current_frame): Use scoped_restore_current_thread and
switch_to_thread.
(get_thread_current_frame): Use thread pointer directly.
(record_btrace_replay_at_breakpoint): Use thread's inferior
pointer directly.
* record-full.c: Include "inferior.h".
* regcache.c: Include "gdbthread.h".
(get_thread_arch_regcache): Use the inferior's address space
directly.
(get_thread_regcache, registers_changed_thread): New.
* regcache.h (get_thread_regcache(thread_info *thread)): New
overload.
(registers_changed_thread): New.
(remote_target) <remote_detach_1>: Swap order of parameters.
(remote_add_thread): <remote_add_thread>: Return the new thread.
(get_remote_thread_info(ptid_t)): New overload.
(remote_target::remote_notice_new_inferior): Use thread pointers
directly.
(remote_target::process_initial_stop_replies): Use
thread_info::set_running.
(remote_target::remote_detach_1, remote_target::detach)
(extended_remote_target::detach): Adjust.
* stack.c (frame_show_address): Use inferior_thread.
* target-debug.h (target_debug_print_thread_info_pp): New.
* target-delegates.c: Regenerate.
* target.c (default_thread_address_space): Delete.
(memory_xfer_partial_1): Use current_inferior.
(target_detach): Use current_inferior.
(target_thread_address_space): Delete.
(generic_mourn_inferior): Use current_inferior.
* target.h (struct target_ops) <thread_address_space>: Delete.
(target_thread_address_space): Delete.
* thread.c (init_thread_list): Use ALL_THREADS_SAFE. Use thread
pointers directly.
(delete_thread_1, delete_thread, delete_thread_silent): Take a
thread pointer instead of a ptid_t. Adjust all callers.
(ptid_to_global_thread_id, global_thread_id_to_ptid): Delete.
(first_thread_of_process): Delete, replaced by ...
(first_thread_of_inferior): ... this new function. All callers
adjusted.
(any_thread_of_process): Rename to ...
(any_thread_of_inferior): ... this, and take an inferior pointer.
(any_live_thread_of_process): Rename to ...
(any_live_thread_of_inferior): ... this, and take an inferior
pointer.
(thread_stack_temporaries_enabled_p, push_thread_stack_temporary)
(value_in_thread_stack_temporaries)
(get_last_thread_stack_temporary): Take a thread pointer instead
of a ptid_t. Adjust all callers.
(thread_info::set_running): New.
(validate_registers_access): Use inferior_thread.
(can_access_registers_ptid): Rename to ...
(can_access_registers_thread): ... this, and take a thread
pointer.
(print_thread_info_1): Adjust to compare thread pointers instead
of ptids.
(switch_to_no_thread, switch_to_thread): Make extern.
(scoped_restore_current_thread::~scoped_restore_current_thread):
Use m_thread pointer directly.
(scoped_restore_current_thread::scoped_restore_current_thread):
Use inferior_thread.
(thread_command): Use thread pointer directly.
(thread_num_make_value_helper): Use inferior_thread.
* top.c (execute_command): Use inferior_thread.
* tui/tui-interp.c: Include "inferior.h".
* varobj.c (varobj_create): Use inferior_thread.
(value_of_root_1): Use find_thread_global_id instead of
global_thread_id_to_ptid.
|
|
Since we use obstacks with objects that are not default constructible,
we sometimes need to manually call the constructor by hand using
placement new:
foo *f = obstack_alloc (obstack, sizeof (foo));
f = new (f) foo;
It's possible to use allocate_on_obstack instead, but there are types
that we sometimes want to allocate on an obstack, and sometimes on the
regular heap. This patch introduces a utility to make this pattern
simpler if allocate_on_obstack is not an option:
foo *f = obstack_new<foo> (obstack);
Right now there's only one usage (in tdesc_data_init).
To help catch places where we would forget to call new when allocating
such an object on an obstack, this patch also poisons some other methods
of allocating an instance of a type on an obstack:
- OBSTACK_ZALLOC/OBSTACK_CALLOC
- XOBNEW/XOBNEW
- GDBARCH_OBSTACK_ZALLOC/GDBARCH_OBSTACK_CALLOC
Unfortunately, there's no way to catch wrong usages of obstack_alloc.
By pulling on that string though, it tripped on allocating struct
template_symbol using OBSTACK_ZALLOC. The criterion currently used to
know whether it's safe to "malloc" an instance of a struct is whether it
is a POD. Because it inherits from struct symbol, template_symbol is
not a POD. This criterion is a bit too strict however, it should still
safe to allocate memory for a template_symbol and memset it to 0. We
didn't use is_trivially_constructible as the criterion in the first
place only because it is not available in gcc < 5. So here I considered
two alternatives:
1. Relax that criterion to use std::is_trivially_constructible and add a
bit more glue code to make it work with gcc < 5
2. Continue pulling on the string and change how the symbol structures
are allocated and initialized
I managed to do both, but I decided to go with #1 to keep this patch
simpler and more focused. When building with a compiler that does not
have is_trivially_constructible, the check will just not be enforced.
gdb/ChangeLog:
* common/traits.h (HAVE_IS_TRIVIALLY_COPYABLE): Define if
compiler supports std::is_trivially_constructible.
* common/poison.h: Include obstack.h.
(IsMallocable): Define to is_trivially_constructible if the
compiler supports it, define to true_type otherwise.
(xobnew): New.
(XOBNEW): Redefine.
(xobnewvec): New.
(XOBNEWVEC): Redefine.
* gdb_obstack.h (obstack_zalloc): New.
(OBSTACK_ZALLOC): Redefine.
(obstack_calloc): New.
(OBSTACK_CALLOC): Redefine.
(obstack_new): New.
* gdbarch.sh: Include gdb_obstack in gdbarch.h.
(gdbarch_obstack): New declaration in gdbarch.h, definition in
gdbarch.c.
(GDBARCH_OBSTACK_CALLOC, GDBARCH_OBSTACK_ZALLOC): Use
obstack_calloc/obstack_zalloc.
(gdbarch_obstack_zalloc): Remove.
* target-descriptions.c (tdesc_data_init): Use obstack_new.
|
|
This removes the long_long_align_bit gdbarch attribute in favor of
type_align. This uncovered two possible issues.
First, arc-tdep.c claimed that long long alignment was 32 bits, but as
discussed on the list, ARC has a maximum alignment of 32 bits, so I've
added an arc_type_align function to account for this.
Second, jit.c, the sole user of long_long_align_bit, was confusing
"long long" with uint64_t. The relevant structure is defined in the
JIT API part of the manual as:
struct jit_code_entry
{
struct jit_code_entry *next_entry;
struct jit_code_entry *prev_entry;
const char *symfile_addr;
uint64_t symfile_size;
};
I've changed this code to use uint64_t.
2018-04-30 Tom Tromey <tom@tromey.com>
* jit.c (jit_read_code_entry): Use type_align.
* i386-tdep.c (i386_gdbarch_init): Don't call
set_gdbarch_long_long_align_bit.
* gdbarch.sh: Remove long_long_align_bit.
* gdbarch.c, gdbarch.h: Rebuild.
* arc-tdep.c (arc_type_align): New function.
(arc_gdbarch_init): Use arc_type_align. Don't call
set_gdbarch_long_long_align_bit.
|
|
This adds some basic type alignment support to gdb. It changes struct
type to store the alignment, and updates dwarf2read.c to handle
DW_AT_alignment. It also adds a new gdbarch method and updates
i386-tdep.c.
None of this new functionality is used anywhere yet, so tests will
wait until the next patch.
2018-04-30 Tom Tromey <tom@tromey.com>
* i386-tdep.c (i386_type_align): New function.
(i386_gdbarch_init): Update.
* gdbarch.sh (type_align): New method.
* gdbarch.c, gdbarch.h: Rebuild.
* arch-utils.h (default_type_align): Declare.
* arch-utils.c (default_type_align): New function.
* gdbtypes.h (TYPE_ALIGN_BITS): New define.
(struct type) <align_log2>: New field.
<instance_flags>: Now a bitfield.
(TYPE_RAW_ALIGN): New macro.
(type_align, type_raw_align, set_type_align): Declare.
* gdbtypes.c (type_align, type_raw_align, set_type_align): New
functions.
* dwarf2read.c (quirk_rust_enum): Set type alignment.
(get_alignment, maybe_set_alignment): New functions.
(read_structure_type, read_enumeration_type, read_array_type)
(read_set_type, read_tag_pointer_type, read_tag_reference_type)
(read_subrange_type, read_base_type): Set type alignment.
|
|
With version 7.3 GCC supports new options
-mindirect-branch=<choice>
-mfunction-return=<choice>
The choices are:
keep behaves as before
thunk jumps through a thunk
thunk-external jumps through an external thunk
thunk-inline jumps through an inlined thunk
For thunk and thunk-external, GDB would, on a call to the thunk, step into
the thunk and then resume to its caller assuming that this is an
undebuggable function. On a return thunk, GDB would stop inside the
thunk.
Make GDB step through such thunks instead.
Before:
Temporary breakpoint 1, main ()
at gdb.base/step-indirect-call-thunk.c:37
37 x = apply (inc, 41);
(gdb) s
apply (op=0x80483e6 <inc>, x=41)
at gdb.base/step-indirect-call-thunk.c:29
29 return op (x);
(gdb)
30 }
After:
Temporary breakpoint 1, main ()
at gdb.base/step-indirect-call-thunk.c:37
37 x = apply (inc, 41);
(gdb) s
apply (op=0x80483e6 <inc>, x=41)
at gdb.base/step-indirect-call-thunk.c:29
29 return op (x);
(gdb)
inc (x=41) at gdb.base/step-indirect-call-thunk.c:23
23 return x + 1;
This is independent of the step-mode. In order to step into the thunk,
you would need to use stepi.
When stepping over an indirect call thunk, GDB would first step through
the thunk, then recognize that it stepped into a sub-routine and resume to
the caller (of the thunk). Not sure whether this is worth optimizing.
Thunk detection is implemented via gdbarch. I implemented the methods for
IA. Other architectures may run into unexpected fails.
The tests assume a fixed number of instruction steps to reach a thunk.
This depends on the compiler as well as the architecture. They may need
adjustments when we add support for more architectures. Or we can simply
drop those tests that cover being able to step into thunks using
instruction stepping.
When using an older GCC, the tests will fail to build and will be reported
as untested:
Running .../gdb.base/step-indirect-call-thunk.exp ...
gdb compile failed, \
gcc: error: unrecognized command line option '-mindirect-branch=thunk'
gcc: error: unrecognized command line option '-mfunction-return=thunk'
=== gdb Summary ===
# of untested testcases 1
gdb/
* infrun.c (process_event_stop_test): Call
gdbarch_in_indirect_branch_thunk.
* gdbarch.sh (in_indirect_branch_thunk): New.
* gdbarch.c: Regenerated.
* gdbarch.h: Regenerated.
* x86-tdep.h: New.
* x86-tdep.c: New.
* Makefile.in (ALL_TARGET_OBS): Add x86-tdep.o.
(HFILES_NO_SRCDIR): Add x86-tdep.h.
(ALLDEPFILES): Add x86-tdep.c.
* arch-utils.h (default_in_indirect_branch_thunk): New.
* arch-utils.c (default_in_indirect_branch_thunk): New.
* i386-tdep: Include x86-tdep.h.
(i386_in_indirect_branch_thunk): New.
(i386_elf_init_abi): Set in_indirect_branch_thunk gdbarch
function.
* amd64-tdep: Include x86-tdep.h.
(amd64_in_indirect_branch_thunk): New.
(amd64_init_abi): Set in_indirect_branch_thunk gdbarch function.
testsuite/
* gdb.base/step-indirect-call-thunk.exp: New.
* gdb.base/step-indirect-call-thunk.c: New.
* gdb.reverse/step-indirect-call-thunk.exp: New.
* gdb.reverse/step-indirect-call-thunk.c: New.
|
|
This changes the gdbarch fast_tracepoint_valid_at method to use a
std::string as its out parameter, and then updates all the uses. This
allows removing a cleanup from breakpoint.c.
Regression tested by the buildbot.
ChangeLog
2018-02-24 Tom Tromey <tom@tromey.com>
* i386-tdep.c (i386_fast_tracepoint_valid_at): "msg" now a
std::string.
* gdbarch.sh (fast_tracepoint_valid_at): Change "msg" to a
std::string*.
* gdbarch.c: Rebuild.
* gdbarch.h: Rebuild.
* breakpoint.c (check_fast_tracepoint_sals): Use std::string.
* arch-utils.h (default_fast_tracepoint_valid_at): Update.
* arch-utils.c (default_fast_tracepoint_valid_at): "msg" now a
std::string*.
|
|
We can pass readable_regcache to gdbarch method read_pc where it is
allowed to do read from regcache.
gdb:
2018-02-21 Yao Qi <yao.qi@linaro.org>
* avr-tdep.c (avr_read_pc): Change parameter type to
readable_regcache.
* gdbarch.sh (read_pc): Likewise.
* gdbarch.c: Re-generated.
* gdbarch.h: Re-generated.
* hppa-tdep.c (hppa_read_pc): Change parameter type to
readable_regcache.
* ia64-tdep.c (ia64_read_pc): Likewise.
* mips-tdep.c (mips_read_pc): Likewise.
* spu-tdep.c (spu_read_pc): Likewise.
|
|
pseudo_register_read and pseudo_register_read_value
pseudo registers are either from raw registers or memory, so
gdbarch methods pseudo_register_read and pseudo_register_read_value
should have regcache object which only have read methods. In other
words, we should disallow writing to regcache in these two gdbarch
methods. In order to apply this restriction, this patch adds a new
class readable_regcache, derived from reg_buffer, and it only has
raw_read and cooked_read methods. regcache is derived from
readable_regcache. This patch also passes readable_regcache instead of
regcache to gdbarch methods pseudo_register_read and
pseudo_register_read_value.
This patch moves raw_read* and cooked_read* methods to readable_regcache,
which is straightforward. One thing not straightforward is that I split
regcache::xfer_part to readable_regcache::read_part and regcache::write_part,
because readable_regcache can only have methods to read.
readable_regcache is an abstract base class, and it has a pure virtual
function raw_update, because I don't want readable_regcache know where
these raw registers are from. They can be from either the target
(readwrite regcache) or the regcache itself (readonly regcache).
gdb:
2018-02-21 Yao Qi <yao.qi@linaro.org>
* aarch64-tdep.c (aarch64_pseudo_register_read_value): Change
parameter type to 'readable_regcache *'.
* amd64-tdep.c (amd64_pseudo_register_read_value): Likewise.
* arm-tdep.c (arm_neon_quad_read): Likewise.
(arm_pseudo_read): Likewise.
* avr-tdep.c (avr_pseudo_register_read): Likewise.
* bfin-tdep.c (bfin_pseudo_register_read): Likewise.
* frv-tdep.c (frv_pseudo_register_read): Likewise.
* gdbarch.c: Re-generated.
* gdbarch.h: Re-generated.
* gdbarch.sh (pseudo_register_read): Change parameter type to
'readable_regcache *'.
(pseudo_register_read_value): Likewise.
* h8300-tdep.c (pseudo_from_raw_register): Likewise.
(h8300_pseudo_register_read): Likewise.
* hppa-tdep.c (hppa_pseudo_register_read): Likewise.
* i386-tdep.c (i386_mmx_regnum_to_fp_regnum): Likewise.
(i386_pseudo_register_read_into_value): Likewise.
(i386_pseudo_register_read_value): Likewise.
* i386-tdep.h (i386_pseudo_register_read_into_value): Update
declaration.
* ia64-tdep.c (ia64_pseudo_register_read): Likewise.
* m32c-tdep.c (m32c_raw_read): Likewise.
(m32c_read_flg): Likewise.
(m32c_banked_register): Likewise.
(m32c_banked_read): Likewise.
(m32c_sb_read): Likewise.
(m32c_part_read): Likewise.
(m32c_cat_read): Likewise.
(m32c_r3r2r1r0_read): Likewise.
(m32c_pseudo_register_read): Likewise.
* m68hc11-tdep.c (m68hc11_pseudo_register_read): Likewise.
* mep-tdep.c (mep_pseudo_cr32_read): Likewise.
(mep_pseudo_cr64_read): Likewise.
(mep_pseudo_register_read): Likewise.
* mips-tdep.c (mips_pseudo_register_read): Likewise.
* msp430-tdep.c (msp430_pseudo_register_read): Likewise.
* nds32-tdep.c (nds32_pseudo_register_read): Likewise.
* regcache.c (regcache::raw_read): Move it to readable_regcache.
(regcache::cooked_read): Likewise.
(regcache::cooked_read_value): Likewise.
(regcache_cooked_read_signed):
(regcache::cooked_read): Likewise.
* regcache.h (readable_regcache): New class.
(regcache): Inherit readable_regcache. Move some methods to
readable_regcache.
* rl78-tdep.c (rl78_pseudo_register_read): Change
parameter type to 'readable_regcache *'.
* rs6000-tdep.c (do_regcache_raw_read): Remove.
(e500_pseudo_register_read): Change parameter type to
'readable_regcache *'.
(dfp_pseudo_register_read): Likewise.
(vsx_pseudo_register_read): Likewise.
(efpr_pseudo_register_read): Likewise.
* s390-tdep.c (s390_pseudo_register_read): Likewise.
* sh-tdep.c (sh_pseudo_register_read): Likewise.
* sh64-tdep.c (pseudo_register_read_portions): Likewise.
(sh64_pseudo_register_read): Likewise.
* sparc-tdep.c (sparc32_pseudo_register_read): Likewise.
* sparc64-tdep.c (sparc64_pseudo_register_read): Likewise.
* spu-tdep.c (spu_pseudo_register_read_spu): Likewise.
(spu_pseudo_register_read): Likewise.
* xtensa-tdep.c (xtensa_register_read_masked): Likewise.
(xtensa_pseudo_register_read): Likewise.
|
|
gdb/ChangeLog:
Update copyright year range in all GDB files
|
|
ARMv8 supports tagged address, that is, the top one byte in address
is ignored. It is always enabled on aarch64-linux. See
https://www.kernel.org/doc/Documentation/arm64/tagged-pointers.txt
The tag in the tagged address is modeled as non-significant bits in
address, so this patch adds a new gdbarch method significant_addr_bit and
clear the non-significant bits (the top byte in ARMv8) of the virtual
address at the point before passing address to target cache layer. IOW,
the address used in the target cache layer is already cleared.
Before this patch,
(gdb) x/x 0x0000000000411030
0x411030 <global>: 0x00000000
(gdb) x/x 0xf000000000411030
0xf000000000411030: Cannot access memory at address 0xf000000000411030
After this patch,
(gdb) x/x 0x0000000000411030
0x411030 <global>: 0x00000000
(gdb) x/x 0xf000000000411030
0xf000000000411030: 0x00000000
Note that I used address_significant in paddress, but it causes a
regression gdb.base/long_long.exp, because gdb clears the non-significant
bits in address, but test still expects them.
p/a val.oct^M
$24 = 0x2ee53977053977^M
(gdb) FAIL: gdb.base/long_long.exp: p/a val.oct
so I defer the change there.
gdb:
2017-12-08 Yao Qi <yao.qi@linaro.org>
* aarch64-tdep.c (aarch64_gdbarch_init): Install gdbarch
significant_addr_bit.
* gdbarch.sh (significant_addr_bit): New.
* gdbarch.c, gdbarch.h: Re-generated.
* target.c (memory_xfer_partial): Call address_significant.
* utils.c (address_significant): New function.
* utils.h (address_significant): Declare.
2017-12-08 Yao Qi <yao.qi@linaro.org>
gdb/testsuite:
* gdb.arch/aarch64-tagged-pointer.c: New file.
* gdb.arch/aarch64-tagged-pointer.exp: New file.
|
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Nothing uses this function. Remove it, and adjust comments referring to
it.
gdb/ChangeLog:
* arch-utils.h (simple_displaced_step_copy_insn): Remove.
* arch-utils.c (simple_displaced_step_copy_insn): Remove.
* gdbarch.sh (displaced_step_copy_insn): Adjust comment.
* gdbarch.h: Regenerate.
* i386-linux-tdep.c (i386_linux_displaced_step_copy_insn):
Adjust comment.
* i386-tdep.c (i386_displaced_step_copy_insn): Adjust comment.
(i386_displaced_step_fixup): Adjust comment.
* rs6000-tdep.c (ppc_displaced_step_copy_insn): Adjust comment.
|
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Revert parts of commit b3ac9c77560a ("Put more info in NT_PRPSINFO Linux
notes"), <https://sourceware.org/ml/binutils/2013-02/msg00024.html>, and
remove support for a Linux core PRPSINFO note writer override, now that
all variants are handled automatically within BFD itself.
gdb/
* linux-tdep.c (linux_make_corefile_notes): Remove call to
`gdbarch_elfcore_write_linux_prpsinfo'.
* gdbarch.sh (elfcore_write_linux_prpsinfo): Remove architecture
method.
(elf_internal_linux_prpsinfo): Remove declaration.
* gdbarch.h: Regenerate.
* gdbarch.c: Regenerate.
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Remove a duplicate `struct objfile' declaration mistakenly added with
commit 3e29f34a4eef ("MIPS: Keep the ISA bit in compressed code
addresses").
gdb/
* gdbarch.sh (objfile): Remove duplicate declaration.
* gdbarch.h: Regenerate.
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As an update to commit ede5f15146ae ("gdbarch.h: Change
gdbarch_info::tdep_info's type to void *") replace the definition of the
`tdep_info' member in `struct gdbarch_info' with an anonymous union,
comprising the original member, with its type reverted to `struct
gdbarch_tdep_info *', a `tdesc_data' member of a `struct tdesc_arch_data
*' type and an `id' member of an `int *' type. Remove now unnecessary
casts throughout use places then, making code easier to read an less
prone to errors, which may happen with casting.
gdb/
* gdbarch.sh (gdbarch_info): Replace the `tdep_info' member with
a union of `tdep_info', `tdesc_data' and `id'.
* aarch64-tdep.c (aarch64_gdbarch_init): Use `info.tdesc_data'
rather than `info.tdep_info'.
* amd64-linux-tdep.c (amd64_linux_init_abi): Likewise.
* i386-linux-tdep.c (i386_linux_init_abi): Likewise.
* i386-tdep.c (i386_gdbarch_init): Likewise.
* mips-linux-tdep.c (mips_linux_init_abi): Likewise.
* mips-tdep.c (mips_gdbarch_init): Likewise.
* nds32-tdep.c (nds32_gdbarch_init): Likewise.
* rs6000-tdep.c (rs6000_gdbarch_init): Likewise.
* ppc-linux-tdep.c (ppu2spu_sniffer): Use `info.id' rather than
`info.tdep_info'.
(ppc_linux_init_abi): Use `info.tdesc_data' rather than
`info.tdep_info'.
* sparc-tdep.c (sparc32_gdbarch_init): Likewise.
* spu-multiarch.c (spu_gdbarch): Use `info.id' rather than
`info.tdep_info'.
* spu-tdep.c (spu_gdbarch_init): Likewise.
* gdbarch.h: Regenerate.
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Previously the core_xfer_partial method used core_get_siginfo to handle
TARGET_OBJECT_SIGNAL_INFO requests. However, core_get_siginfo looked for
Linux-specific sections in the core file. To support fetching siginfo
from cores on other systems, add a new gdbarch method (`core_xfer_siginfo`)
and move the body of the existing core_get_siginfo into a
linux_core_xfer_siginfo implementation of this method in linux-tdep.c.
gdb/ChangeLog:
* corelow.c (get_core_siginfo): Remove.
(core_xfer_partial): Use the gdbarch "core_xfer_siginfo" method
instead of get_core_siginfo.
* gdbarch.sh (core_xfer_siginfo): New gdbarch callback.
* gdbarch.h: Re-generate.
* gdbarch.c: Re-generate.
* linux-tdep.c (linux_core_xfer_siginfo): New.
(linux_init_abi): Install gdbarch "core_xfer_siginfo" method.
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The displaced_step_free_closure gdbarch hook allows architectures to
free data they might have allocated to complete a displaced step.
However, all architectures using that hook use the
simple_displaced_step_free_closure provided in arch-utils.{c,h}, which
does a simple xfree. We can remove it and do an xfree directly instead
of calling the hook.
gdb/ChangeLog:
* gdbarch.sh (displaced_step_free_closure): Remove.
* gdbarch.h, gdbarch.c: Re-generate.
* aarch64-linux-tdep.c (aarch64_linux_init_abi): Don't set
displaced_step_free_closure.
* amd64-linux-tdep.c (amd64_linux_init_abi_common): Likewise.
* arm-linux-tdep.c (arm_linux_init_abi): Likewise.
* i386-linux-tdep.c (i386_linux_init_abi): Likewise.
* rs6000-aix-tdep.c (rs6000_aix_init_osabi): Likewise.
* rs6000-tdep.c (rs6000_gdbarch_init): Likewise.
* s390-linux-tdep.c (s390_gdbarch_init): Likewise.
* arch-utils.h (simple_displaced_step_free_closure): Remove.
* arch-utils.c (simple_displaced_step_free_closure): Remove.
* infrun.c (displaced_step_clear): Call xfree instead of
gdbarch_displaced_step_free_closure.
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As Pedro commented on the patch "Change field separator in gdbarch.sh",
this commented out definition is probably not useful and should be
removed. It has been commented out for basically forever, and it
probably serves the same intent as addressable_memory_unit_size.
gdb/ChangeLog:
* gdbarch.sh: Remove commented out definition of
TARGET_CHAR_BIT.
* gdbarch.h: Re-generate.
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This is a relatively straightforward patch that changes
gdbarch_software_single_step so it returns an std::vector<CORE_ADDR>
instead of a VEC (CORE_ADDR).
gdb/ChangeLog:
* gdbarch.sh (software_single_step): Change return type to
std::vector<CORE_ADDR>.
* gdbarch.c, gdbarch.h: Re-generate.
* arch/arm-get-next-pcs.c (thumb_deal_with_atomic_sequence_raw):
Adjust.
(arm_deal_with_atomic_sequence_raw): Adjust.
(thumb_get_next_pcs_raw): Adjust.
(arm_get_next_pcs_raw): Adjust.
(arm_get_next_pcs): Adjust.
* arch/arm-get-next-pcs.h (arm_get_next_pcs): Adjust.
* aarch64-tdep.c (aarch64_software_single_step): Adjust.
* alpha-tdep.c (alpha_deal_with_atomic_sequence): Adjust.
(alpha_software_single_step): Adjust.
* alpha-tdep.h (alpha_software_single_step): Adjust.
* arm-linux-tdep.c (arm_linux_software_single_step): Adjust.
* arm-tdep.c (arm_software_single_step): Adjust.
(arm_breakpoint_kind_from_current_state): Adjust.
* arm-tdep.h (arm_software_single_step): Adjust.
* breakpoint.c (insert_single_step_breakpoint): Adjust.
* cris-tdep.c (cris_software_single_step): Adjust.
* mips-tdep.c (mips_deal_with_atomic_sequence): Adjust.
(micromips_deal_with_atomic_sequence): Adjust.
(deal_with_atomic_sequence): Adjust.
(mips_software_single_step): Adjust.
* mips-tdep.h (mips_software_single_step): Adjust.
* moxie-tdep.c (moxie_software_single_step): Adjust.
* nios2-tdep.c (nios2_software_single_step): Adjust.
* ppc-tdep.h (ppc_deal_with_atomic_sequence): Adjust.
* rs6000-aix-tdep.c (rs6000_software_single_step): Adjust.
* rs6000-tdep.c (ppc_deal_with_atomic_sequence): Adjust.
* s390-linux-tdep.c (s390_software_single_step): Adjust.
* sparc-tdep.c (sparc_software_single_step): Adjust.
* spu-tdep.c (spu_software_single_step): Adjust.
* tic6x-tdep.c (tic6x_software_single_step): Adjust.
gdb/gdbserver/ChangeLog:
* linux-arm-low.c (arm_gdbserver_get_next_pcs): Adjust to
software_single_step change of return type to
std::vector<CORE_ADDR>.
* linux-low.c (install_software_single_step_breakpoints):
Likewise.
* linux-low.h (install_software_single_step_breakpoints):
Likewise.
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The fields in the description of the gdbarch interface are separated
using colons. That becomes a problem if we want to use things like
std::vector in it. This patch changes the field separator to use
semicolons instead.
I think there's very little chance we'll ever want to use a semicolon in
one of the fields, but if you think another character would be more
appropriate, let me know.
gdb/ChangeLog:
* gdbarch.sh: Use semi-colon as field separator instead of colon.
* gdbarch.h: Re-generate.
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Recently a feature called "return address signing" has been added to GCC to
prevent stack smash stack on AArch64. For details please refer:
https://gcc.gnu.org/ml/gcc-patches/2017-01/msg00376.html
GDB needs to be aware of this feature so it can restore the original return
address which is critical for unwinding.
On compiler side, whenever return address, i.e. LR register, is mangled or
restored by hardware instruction, compiler is expected to generate a
DW_CFA_AARCH64_negate_ra_state to toggle return address signing status.
DW_CFA_AARCH64_negate_ra_state is using the same CFI number and
therefore need to be multiplexed with DW_CFA_GNU_window_save which was designed
for SPARC.
A new gdbarch method "execute_dwarf_cfa_vendor_op" is introduced by this patch.
It's parameters has been restricted to those only needed by SPARC and AArch64
for multiplexing DW_CFA_GNU_window_save which is a CFI operation takes none
operand. Should any further DWARF CFI operation want to be multiplexed in the
future, the parameter list can be extended. Below is the current function
prototype.
typedef int (gdbarch_execute_dwarf_cfa_vendor_op_ftype)
(struct gdbarch *gdbarch, gdb_byte op, struct dwarf2_frame_state *fs);
DW_CFA_GNU_window_save support for SPARC is migrated to this new gdbarch
method by this patch.
gdb/
* gdbarch.sh: New gdbarch method execute_dwarf_cfa_vendor_op.
* gdbarch.c: Regenerated.
* gdbarch.h: Regenerated.
* dwarf2-frame.c (dwarf2_frame_state_alloc_regs): Made the
visibility external.
(execute_cfa_program): Call execute_dwarf_cfa_vendor_op for CFI
between DW_CFA_lo_user and DW_CFA_high_user inclusive.
(enum cfa_how_kind): Move to ...
(struct dwarf2_frame_state_reg_info): Likewise.
(struct dwarf2_frame_state): Likewise.
* dwarf2-frame.h: ... here.
(dwarf2_frame_state_alloc_regs): New declaration.
* sparc-tdep.c (sparc_execute_dwarf_cfa_vendor_op): New function.
(sparc32_gdbarch_init): Register execute_dwarf_cfa_vendor_op hook.
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GDB is currently not aware that wchar_t is a built-in type in C++
mode. This is usually not a problem because the debug info describes
the type, so when you have a program loaded, you don't notice this.
However, if you try expressions involving wchar_t before a program is
loaded, gdb errors out:
(gdb) p (wchar_t)-1
No symbol table is loaded. Use the "file" command.
(gdb) p L"hello"
No type named wchar_t.
(gdb) ptype L"hello"
No type named wchar_t.
This commit teaches gdb about the type. After:
(gdb) p (wchar_t)-1
$1 = -1 L'\xffffffff'
(gdb) p L"hello"
$2 = L"hello"
(gdb) ptype L"hello"
type = wchar_t [6]
Unlike char16_t/char32_t, unfortunately, the underlying type of
wchar_t is implementation dependent, both size and signness. So this
requires adding a couple new gdbarch hooks.
I grepped the GCC code base for WCHAR_TYPE and WCHAR_TYPE_SIZE, and it
seems to me that the majority of the ABIs have a 4-byte signed
wchar_t, so that's what I made the default for GDB too. And then I
looked for which ports have a 16-bit and/or unsigned wchar_t, and made
GDB follow suit.
gdb/ChangeLog:
2017-04-12 Pedro Alves <palves@redhat.com>
PR gdb/21323
* c-lang.c (cplus_primitive_types) <cplus_primitive_type_wchar_t>:
New enum value.
(cplus_language_arch_info): Register cplus_primitive_type_wchar_t.
* gdbtypes.h (struct builtin_type) <builtin_wchar>: New field.
* gdbtypes.c (gdbtypes_post_init): Create the "wchar_t" type.
* gdbarch.sh (wchar_bit, wchar_signed): New per-arch values.
* gdbarch.h, gdbarch.c: Regenerate.
* aarch64-tdep.c (aarch64_gdbarch_init): Override
gdbarch_wchar_bit and gdbarch_wchar_signed.
* alpha-tdep.c (alpha_gdbarch_init): Likewise.
* arm-tdep.c (arm_gdbarch_init): Likewise.
* avr-tdep.c (avr_gdbarch_init): Likewise.
* h8300-tdep.c (h8300_gdbarch_init): Likewise.
* i386-nto-tdep.c (i386nto_init_abi): Likewise.
* i386-tdep.c (i386_go32_init_abi): Likewise.
* m32r-tdep.c (m32r_gdbarch_init): Likewise.
* moxie-tdep.c (moxie_gdbarch_init): Likewise.
* nds32-tdep.c (nds32_gdbarch_init): Likewise.
* rs6000-aix-tdep.c (rs6000_aix_init_osabi): Likewise.
* sh-tdep.c (sh_gdbarch_init): Likewise.
* sparc-tdep.c (sparc32_gdbarch_init): Likewise.
* sparc64-tdep.c (sparc64_init_abi): Likewise.
* windows-tdep.c (windows_init_abi): Likewise.
* xstormy16-tdep.c (xstormy16_gdbarch_init): Likewise.
gdb/testsuite/ChangeLog:
2017-04-12 Pedro Alves <palves@redhat.com>
PR gdb/21323
* gdb.cp/wide_char_types.c: Include <wchar.h>.
(wchar): New global.
* gdb.cp/wide_char_types.exp (wide_char_types_program)
(do_test_wide_char, wide_char_types_no_program, top level): Add
wchar_t testing.
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-Wwrite-strings flagged a missing cast for example here:
static char *
ravenscar_extra_thread_info (struct target_ops *self, struct thread_info *tp)
{
return "Ravenscar task";
Since callers are not supposed to free the string returned by these
methods, change the methods' signature to return const strings.
gdb/ChangeLog:
2017-04-05 Pedro Alves <palves@redhat.com>
* aix-thread.c (aix_thread_pid_to_str)
(aix_thread_extra_thread_info): Constify.
* bsd-kvm.c (bsd_kvm_pid_to_str): Constify.
* bsd-uthread.c (bsd_uthread_extra_thread_info)
(bsd_uthread_pid_to_str): Constify.
* corelow.c (core_pid_to_str): Constify.
* darwin-nat.c (darwin_pid_to_str): Constify.
* fbsd-nat.c (fbsd_pid_to_str): Constify.
* fbsd-tdep.c (fbsd_core_pid_to_str, gdbarch_core_pid_to_str):
Constify.
* gnu-nat.c (gnu_pid_to_str): Constify.
* go32-nat.c (go32_pid_to_str): Constify.
* i386-cygwin-tdep.c (i386_windows_core_pid_to_str): Constify.
* inf-ptrace.c (inf_ptrace_pid_to_str): Constify.
* inferior.c (inferior_pid_to_str): Constify.
* linux-nat.c (linux_nat_pid_to_str): Constify.
* linux-tdep.c (linux_core_pid_to_str): Constify.
* linux-thread-db.c (thread_db_pid_to_str)
(thread_db_extra_thread_info): Constify.
* nto-tdep.c (nto_extra_thread_info): Constify.
* nto-tdep.h (nto_extra_thread_info): Constify.
* obsd-nat.c (obsd_pid_to_str): Constify.
* procfs.c (procfs_pid_to_str): Constify.
* ravenscar-thread.c (ravenscar_extra_thread_info)
(ravenscar_pid_to_str): Constify.
* remote-sim.c (gdbsim_pid_to_str): Constify.
* remote.c (remote_threads_extra_info, remote_pid_to_str):
Constify.
* sol-thread.c (solaris_pid_to_str): Constify.
* sol2-tdep.c (sol2_core_pid_to_str): Constify.
* sol2-tdep.h (sol2_core_pid_to_str): Constify.
* target.c (default_pid_to_str, target_pid_to_str)
(normal_pid_to_str, default_pid_to_str): Constify.
* target.h (target_ops::to_pid_to_str)
(target_ops::to_extra_thread_info): Constify.
(target_pid_to_str, normal_pid_to_str): Constify.
* windows-nat.c (windows_pid_to_str): Constify.
* gdbarch.sh (core_pid_to_str): Constify.
* target-delegates.c: Regenerate.
* gdbarch.h, gdbarch.c: Regenerate.
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This commit adds support to GDB so that it can modify the disassembler-options
value that is passed to the disassembler, similar to objdump's -M option.
Currently, the only supported targets are ARM, PowerPC and S/390, but
adding support for a new target(s) is not difficult.
include/
* dis-asm.h (disasm_options_t): New typedef.
(parse_arm_disassembler_option): Remove prototype.
(set_arm_regname_option): Likewise.
(get_arm_regnames): Likewise.
(get_arm_regname_num_options): Likewise.
(disassemble_init_s390): New prototype.
(disassembler_options_powerpc): Likewise.
(disassembler_options_arm): Likewise.
(disassembler_options_s390): Likewise.
(remove_whitespace_and_extra_commas): Likewise.
(disassembler_options_cmp): Likewise.
(next_disassembler_option): New inline function.
(FOR_EACH_DISASSEMBLER_OPTION): New macro.
opcodes/
* disassemble.c Include "safe-ctype.h".
(disassemble_init_for_target): Handle s390 init.
(remove_whitespace_and_extra_commas): New function.
(disassembler_options_cmp): Likewise.
* arm-dis.c: Include "libiberty.h".
(NUM_ELEM): Delete.
(regnames): Use long disassembler style names.
Add force-thumb and no-force-thumb options.
(NUM_ARM_REGNAMES): Rename from this...
(NUM_ARM_OPTIONS): ...to this. Use ARRAY_SIZE.
(get_arm_regname_num_options): Delete.
(set_arm_regname_option): Likewise.
(get_arm_regnames): Likewise.
(parse_disassembler_options): Likewise.
(parse_arm_disassembler_option): Rename from this...
(parse_arm_disassembler_options): ...to this. Make static.
Use new FOR_EACH_DISASSEMBLER_OPTION macro to scan over options.
(print_insn): Use parse_arm_disassembler_options.
(disassembler_options_arm): New function.
(print_arm_disassembler_options): Handle updated regnames.
* ppc-dis.c: Include "libiberty.h".
(ppc_opts): Add "32" and "64" entries.
(ppc_parse_cpu): Use ARRAY_SIZE and disassembler_options_cmp.
(powerpc_init_dialect): Add break to switch statement.
Use new FOR_EACH_DISASSEMBLER_OPTION macro.
(disassembler_options_powerpc): New function.
(print_ppc_disassembler_options): Use ARRAY_SIZE.
Remove printing of "32" and "64".
* s390-dis.c: Include "libiberty.h".
(init_flag): Remove unneeded variable.
(struct s390_options_t): New structure type.
(options): New structure.
(init_disasm): Rename from this...
(disassemble_init_s390): ...to this. Add initializations for
current_arch_mask and option_use_insn_len_bits_p. Remove init_flag.
(print_insn_s390): Delete call to init_disasm.
(disassembler_options_s390): New function.
(print_s390_disassembler_options): Print using information from
struct 'options'.
* po/opcodes.pot: Regenerate.
binutils/
* objdump.c (main): Use remove_whitespace_and_extra_commas.
gdb/
* NEWS: Mention new set/show disassembler-options commands.
* doc/gdb.texinfo: Document new set/show disassembler-options commands.
* disasm.c: Include "arch-utils.h", "gdbcmd.h" and "safe-ctype.h".
(prospective_options): New static variable.
(gdb_disassembler::gdb_disassembler): Initialize
m_di.disassembler_options.
(gdb_buffered_insn_length_init_dis): Initilize di->disassembler_options.
(get_disassembler_options): New function.
(set_disassembler_options): Likewise.
(set_disassembler_options_sfunc): Likewise.
(show_disassembler_options_sfunc): Likewise.
(disassembler_options_completer): Likewise.
(_initialize_disasm): Likewise.
* disasm.h (get_disassembler_options): New prototype.
(set_disassembler_options): Likewise.
* gdbarch.sh (gdbarch_disassembler_options): New variable.
(gdbarch_verify_disassembler_options): Likewise.
* gdbarch.c: Regenerate.
* gdbarch.h: Likewise.
* arm-tdep.c (num_disassembly_options): Delete.
(set_disassembly_style): Likewise.
(arm_disassembler_options): New static variable.
(set_disassembly_style_sfunc): Convert short style name into long
option name. Call set_disassembler_options.
(show_disassembly_style_sfunc): New function.
(arm_gdbarch_init): Call set_gdbarch_disassembler_options and
set_gdbarch_verify_disassembler_options.
(_initialize_arm_tdep): Delete regnames variable and update callers.
(arm_disassembler_options): Initialize.
(disasm_options): New variable.
(num_disassembly_options): Rename from this...
(num_disassembly_styles): ...to this. Compute by scanning through
disasm_options.
(valid_disassembly_styles): Initialize using disasm_options.
Remove calls to parse_arm_disassembler_option, get_arm_regnames and
set_arm_regname_option.
Pass show_disassembly_style_sfunc to the "disassembler" setshow command.
* rs6000-tdep.c (powerpc_disassembler_options): New static variable.
(rs6000_gdbarch_init): Call set_gdbarch_disassembler_options and
set_gdbarch_verify_disassembler_options.
* s390-tdep.c (s390_disassembler_options): New static variable.
(s390_gdbarch_init):all set_gdbarch_disassembler_options and
set_gdbarch_verify_disassembler_options.
gdb/testsuite/
* gdb.arch/powerpc-power.exp: Delete test.
* gdb.arch/powerpc-power.s: Likewise.
* gdb.disasm/disassembler-options.exp: New test.
* gdb.arch/powerpc-altivec.exp: Likewise.
* gdb.arch/powerpc-altivec.s: Likewise.
* gdb.arch/powerpc-altivec2.exp: Likewise.
* gdb.arch/powerpc-altivec2.s: Likewise.
* gdb.arch/powerpc-altivec3.exp: Likewise.
* gdb.arch/powerpc-altivec3.s: Likewise.
* gdb.arch/powerpc-power7.exp: Likewise.
* gdb.arch/powerpc-power7.s: Likewise.
* gdb.arch/powerpc-power8.exp: Likewise.
* gdb.arch/powerpc-power8.s: Likewise.
* gdb.arch/powerpc-power9.exp: Likewise.
* gdb.arch/powerpc-power9.s: Likewise.
* gdb.arch/powerpc-vsx.exp: Likewise.
* gdb.arch/powerpc-vsx.s: Likewise.
* gdb.arch/powerpc-vsx2.exp: Likewise.
* gdb.arch/powerpc-vsx2.s: Likewise.
* gdb.arch/powerpc-vsx3.exp: Likewise.
* gdb.arch/powerpc-vsx3.s: Likewise.
* gdb.arch/arm-disassembler-options.exp: Likewise.
* gdb.arch/powerpc-disassembler-options.exp: Likewise.
* gdb.arch/s390-disassembler-options.exp: Likewise.
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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.
|
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This patch changes gdbarch method software_single_step's parameter from
"struct frame_info *" to "struct regcache *, IOW, software_single_step
starts to use current regcache rather than current frame for software
single.
gdb:
2016-11-22 Yao Qi <yao.qi@linaro.org>
* gdbarch.sh (software_single_step): Change parameter from frame_info
to regcache.
* gdbarch.c, gdbarch.h: Regenerated.
* aarch64-tdep.c (aarch64_software_single_step): Change parameter
from frame_info to regcache. Don't call get_current_regcache.
* alpha-tdep.c (alpha_deal_with_atomic_sequence): Likewise.
(alpha_software_single_step): Likewise.
* alpha-tdep.h (alpha_software_single_step): Update declaration.
* arm-linux-tdep.c (arm_linux_software_single_step): Likewise.
* arm-tdep.c (arm_software_single_step): Likewise.
* arm-tdep.h (arm_software_single_step): Likewise.
* breakpoint.c (insert_single_step_breakpoint): Pass regcache to
gdbarch_software_single_step.
* cris-tdep.c (cris_software_single_step): Change parameter from
frame_info to regcache. Don't call get_current_regcache.
* mips-tdep.c (mips_software_single_step): Likewise.
* mips-tdep.h (mips_software_single_step): Update declaration.
* moxie-tdep.c (moxie_software_single_step): Likewise.
* nios2-tdep.c (nios2_software_single_step): Likewise.
* ppc-tdep.h (ppc_deal_with_atomic_sequence): Update declaration.
* rs6000-aix-tdep.c (rs6000_software_single_step): Likewise.
* rs6000-tdep.c (ppc_deal_with_atomic_sequence): Likewise.
* s390-linux-tdep.c (s390_software_single_step): Likewise.
* sparc-tdep.c (sparc_software_single_step): Likewise.
* spu-tdep.c (spu_software_single_step): Likewise.
* tic6x-tdep.c (tic6x_software_single_step): Likewise.
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This patch changes gdbarch method software_single_step to return a
vector of addresses on which GDB should insert breakpoints, and don't
insert breakpoints. Instead, the caller of
gdbarch_software_single_step inserts breakpoints if the returned
vector is not NULL.
gdb:
2016-11-08 Yao Qi <yao.qi@linaro.org>
* aarch64-tdep.c (aarch64_software_single_step): Return
VEC (CORE_ADDR) *. Return NULL instead of 0. Don't call
insert_single_step_breakpoint.
* alpha-tdep.c (alpha_deal_with_atomic_sequence): Likewise.
(alpha_software_single_step): Likewise.
* alpha-tdep.h (alpha_software_single_step): Update declaration.
* arm-linux-tdep.c (arm_linux_software_single_step): Return
VEC (CORE_ADDR) *. Return NULL instead of 0.
* arm-tdep.c (arm_software_single_step): Return NULL instead of 0.
* arm-tdep.h (arm_software_single_step): Update declaration.
* breakpoint.c (insert_single_step_breakpoints): New function.
* breakpoint.h (insert_single_step_breakpoints): Declare.
* cris-tdep.c (cris_software_single_step): Return
VEC (CORE_ADDR) *. Don't call insert_single_step_breakpoint.
* gdbarch.sh (software_single_step): Change it to return
VEC (CORE_ADDR) *.
* gdbarch.c, gdbarch.h: Regenerated.
* infrun.c (maybe_software_singlestep): Adjust.
* mips-tdep.c (mips_deal_with_atomic_sequence): Return
VEC (CORE_ADDR) *. Don't call insert_single_step_breakpoint.
(micromips_deal_with_atomic_sequence): Likewise.
(deal_with_atomic_sequence): Likewise.
(mips_software_single_step): Likewise.
* mips-tdep.h (mips_software_single_step): Update declaration.
* moxie-tdep.c (moxie_software_single_step): Likewise.
* nios2-tdep.c (nios2_software_single_step): Likewise.
* ppc-tdep.h (ppc_deal_with_atomic_sequence): Update
declaration.
* record-full.c (record_full_resume): Adjust.
(record_full_wait_1): Likewise.
* rs6000-aix-tdep.c (rs6000_software_single_step): Return
VEC (CORE_ADDR) *. Don't call insert_single_step_breakpoint.
* rs6000-tdep.c (ppc_deal_with_atomic_sequence): Return
VEC (CORE_ADDR) *. Don't call insert_single_step_breakpoint.
* s390-linux-tdep.c (s390_software_single_step): Likewise.
* sparc-tdep.c (sparc_software_single_step): Likewise.
* spu-tdep.c (spu_software_single_step): Likewise.
* tic6x-tdep.c (tic6x_software_single_step): Likewise.
|
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This patch adds a new gdbarch method breakpoint_kind_from_current_state
for single step breakpoint, and uses it in breakpoint_kind.
gdb:
2016-11-03 Yao Qi <yao.qi@linaro.org>
* arch-utils.c (default_breakpoint_kind_from_current_state):
New function.
* arch-utils.h (default_breakpoint_kind_from_current_state):
Declare.
* arm-tdep.c (arm_breakpoint_kind_from_current_state): New
function.
(arm_gdbarch_init): Call
set_gdbarch_breakpoint_kind_from_current_state.
* breakpoint.c (breakpoint_kind): Call
gdbarch_breakpoint_kind_from_current_state for single step
breakpoint. Update comments.
* gdbarch.sh (breakpoint_kind_from_current_state): New.
* gdbarch.c, gdbarch.h: Regenerate.
|
|
This patch removes gdbarch method remote_breakpoint_from_pc, as it
is no longer used.
gdb:
2016-11-03 Yao Qi <yao.qi@linaro.org>
* arch-utils.c (default_remote_breakpoint_from_pc): Remove.
* arch-utils.h (default_remote_breakpoint_from_pc): Remove.
* arm-tdep.c (arm_remote_breakpoint_from_pc): Remove.
(arm_gdbarch_init): Don't call
set_gdbarch_remote_breakpoint_from_pc.
* gdbarch.sh (remote_breakpoint_from_pc): Remove.
* gdbarch.c, gdbarch.h: Regenerate.
* mips-tdep.c (mips_remote_breakpoint_from_pc): Remove.
(mips_gdbarch_init): Don't call
set_gdbarch_remote_breakpoint_from_pc.
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|
This patch adds two gdbarch methods breakpoint_kind_from_pc and
sw_breakpoint_from_kind, and uses target_info.placed_size as "kind"
of the breakpoint. This patch updates the usages of
target_info.placed_size.
The "kind" of a breakpoint is determined by gdbarch rather than
target, so we have gdbarch method breakpoint_kind_from_pc, and we
should set target_info.placed_size out of each implementation of
target to_insert_breakpoint. In this way, each target doesn't have
to set target_info.placed_size any more.
This patch also sets target_info.placed_address before
target_insert_breakpoint too, so that target to_insert_breakpoint
can use it, see record_full_insert_breakpoint.
Before we call target_insert_breakpoint, we set
target_info.placed_address and target_info.placed_size like this,
CORE_ADDR addr = bl->target_info.reqstd_address;
bl->target_info.placed_size = gdbarch_breakpoint_kind_from_pc (bl->gdbarch, &addr);
bl->target_info.placed_address = addr;
return target_insert_breakpoint (bl->gdbarch, &bl->target_info);
target_insert_breakpoint may fail, but it doesn't matter to the "kind"
and "placed_address" of a breakpoint. They should be determined by
gdbarch.
gdb:
2016-11-03 Yao Qi <yao.qi@linaro.org>
* arch-utils.h (GDBARCH_BREAKPOINT_MANIPULATION): Define
breakpoint_kind_from_pc and sw_breakpoint_from_kind.
(GDBARCH_BREAKPOINT_MANIPULATION_ENDIAN): Likewise.
(SET_GDBARCH_BREAKPOINT_MANIPULATION): Call
set_gdbarch_breakpoint_kind_from_pc and
set_gdbarch_sw_breakpoint_from_kind.
* arm-tdep.c: Add comments.
* bfin-tdep.c: Likewise.
* breakpoint.c (breakpoint_kind): New function.
(insert_bp_location): Set target_info.placed_size and
target_info.placed_address.
(bkpt_insert_location): Likewise.
* cris-tdep.c: Add comments.
* gdbarch.sh (breakpoint_kind_from_pc): New.
(sw_breakpoint_from_kind): New.
* gdbarch.c, gdbarch.h: Regenerated.
* ia64-tdep.c (ia64_memory_insert_breakpoint): Don't set
bp_tgt->placed_size.
(ia64_memory_remove_breakpoint): Don't assert
bp_tgt->placed_size.
(ia64_breakpoint_kind_from_pc): New function.
(ia64_gdbarch_init): Install ia64_breakpoint_kind_from_pc.
* m32r-tdep.c (m32r_memory_insert_breakpoint): Don't set
bp_tgt->placed_size.
* mem-break.c (default_memory_insert_breakpoint): Don't set
bp_tgt->placed_size. Call gdbarch_sw_breakpoint_from_kind.
(default_memory_remove_breakpoint): Call
gdbarch_sw_breakpoint_from_kind.
(memory_validate_breakpoint): Don't check bp_tgt->placed_size.
* mips-tdep.c: Add comments.
* mt-tdep.c: Likewise.
* nios2-tdep.c: Likewise.
* record-full.c (record_full_insert_breakpoint): Don't call
gdbarch_breakpoint_from_pc. Don't set bp_tgt->placed_address
and bp_tgt->placed_size.
* remote.c (remote_insert_breakpoint): Don't call
gdbarch_remote_breakpoint_from_pc. Use bp_tgt->placed_size.
Don't set bp_tgt->placed_address and bp_tgt->placed_size.
(remote_insert_hw_breakpoint): Likewise.
* score-tdep.c: Likewise.
* sh-tdep.c: Likewise.
* tic6x-tdep.c: Likewise.
* v850-tdep.c: Likewise.
* xtensa-tdep.c: Likewise.
|
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At this point, all TYPE_CODE_FLT types carry their floating-point format,
except for those creating from reading DWARF or stabs debug info. Those
will be addressed by this commit.
The main issue here is that we actually have to determine which floating-
point format to use. Currently, we only have the type length as input
to this decision. In the future, we may hopefully get --at least in
DWARF-- additional information to help disambiguate multiple different
formats of the same length. For now, we can still look at the type name
as a hint.
This decision logic is encapsulated in a gdbarch callback to allow
platform-specific overrides. The default implementation use the same
logic (compare type length against the various gdbarch_..._bit sizes)
that is currently implemented in floatformat_from_length.
With this commit, all platforms still use the default logic, so there
should be no actual change in behavior. A follow-on commit will add
support for __float128 on Intel and Power.
Once dwarf2read.c and stabsread.c make use of the new callback to
determine floating-point formats, we're now sure every TYPE_CODE_FLT
type will always carry its format. The commit therefore adds asserts
to verify_floatformat to ensure new code will continue to always
provide formats, and removes the code in floatformat_from_type that
used to handle types with a NULL TYPE_FLOATFORMAT.
gdb/ChangeLog:
* gdbarch.sh (floatformat_for_type): New gdbarch callback.
* gdbarch.h, gdbarch.c: Re-generate.
* arch-utils.h (default_floatformat_for_type): New prototype.
* arch-utils.c (default_floatformat_for_type): New function.
* doublest.c (floatformat_from_length): Remove.
(floatformat_from_type): Assume TYPE_FLOATFORMAT is non-NULL.
* gdbtypes.c (verify_floatformat): Require non-NULL format.
* dwarf2read.c (dwarf2_init_float_type): New function.
(read_base_type): Use it.
* stabsread.c (dbx_init_float_type): New function.
(read_sun_floating_type): Use it.
(read_range_type): Likewise.
Signed-off-by: Ulrich Weigand <ulrich.weigand@de.ibm.com>
|
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Different platforms have different meanings for auxiliary vector
entries. The 'print_auxv_entry' gdbarch method allows an architecture
to output a suitable description for platform-specific entries.
A fprint_auxv_entry function is split out of fprint_target_auxv.
This function outputs the description of a single auxiliary vector
entry to the specified file using caller-supplied formatting and
strings to describe the vector type.
The existing switch on auxiliary vector types is moved out of
fprint_target_auxv into a new default_print_auxv_entry function.
default_print_auxv_entry chooses an appropriate format and description
and calls fprint_single_auxv to describe a single vector entry.
This function is used as the default 'print_auxv_entry' gdbarch method.
fprint_target_auxv now invokes the gdbarch 'print_auxv_entry' method
on each vector entry.
gdb/ChangeLog:
* auxv.c (fprint_auxv_entry): New function.
(default_print_auxv_entry): New function.
(fprint_target_auxv): Use gdbarch_print_auxv_entry.
* auxv.h (enum auxv_format): New enum.
(fprint_auxv_entry): Declare.
(default_print_auxv_entry): Declare.
* gdbarch.sh (print_auxv_entry): New.
* gdbarch.c, gdbarch.h: Re-generated.
|
|
Nowadays, GDB can't insert breakpoint on the return address of the
exception handler on ARM M-profile, because the address is a magic
one 0xfffffff9,
(gdb) bt
#0 CT32B1_IRQHandler () at ../src/timer.c:67
#1 <signal handler called>
#2 main () at ../src/timer.c:127
(gdb) info frame
Stack level 0, frame at 0x200ffa8:
pc = 0x4ec in CT32B1_IRQHandler (../src/timer.c:67); saved pc = 0xfffffff9
called by frame at 0x200ffc8
source language c.
Arglist at 0x200ffa0, args:
Locals at 0x200ffa0, Previous frame's sp is 0x200ffa8
Saved registers:
r7 at 0x200ffa0, lr at 0x200ffa4
(gdb) x/x 0xfffffff9
0xfffffff9: Cannot access memory at address 0xfffffff9
(gdb) finish
Run till exit from #0 CT32B1_IRQHandler () at ../src/timer.c:67
Ed:15: Target error from Set break/watch: Et:96: Pseudo-address (0xFFFFFFxx) for EXC_RETURN is invalid (GDB error?)
Warning:
Cannot insert hardware breakpoint 0.
Could not insert hardware breakpoints:
You may have requested too many hardware breakpoints/watchpoints.
Command aborted.
even some debug probe can't set hardware breakpoint on the magic
address too,
(gdb) hbreak *0xfffffff9
Hardware assisted breakpoint 2 at 0xfffffff9
(gdb) c
Continuing.
Ed:15: Target error from Set break/watch: Et:96: Pseudo-address (0xFFFFFFxx) for EXC_RETURN is invalid (GDB error?)
Warning:
Cannot insert hardware breakpoint 2.
Could not insert hardware breakpoints:
You may have requested too many hardware breakpoints/watchpoints.
Command aborted.
The problem described above is quite similar to PR 8841, in which GDB
can't set breakpoint on signal trampoline, which is mapped to a read-only
page by kernel. The rationale of this patch is to skip "unwritable"
frames when looking for caller frames in command "finish", and a new
gdbarch method code_of_frame_writable is added. This patch fixes
the problem on ARM cortex-m target, but it can be used to fix
PR 8841 too.
gdb:
2016-05-10 Yao Qi <yao.qi@arm.com>
* arch-utils.c (default_code_of_frame_writable): New function.
* arch-utils.h (default_code_of_frame_writable): Declare.
* arm-tdep.c (arm_code_of_frame_writable): New function.
(arm_gdbarch_init): Install gdbarch method
code_of_frame_writable if the target is M-profile.
* frame.c (skip_unwritable_frames): New function.
* frame.h (skip_unwritable_frames): Declare.
* gdbarch.sh (code_of_frame_writable): New.
* gdbarch.c, gdbarch.h: Re-generated.
* infcmd.c (finish_command): Call skip_unwritable_frames.
|
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GDB doesn't insert software single step breakpoint if the instruction
branches to itself, so that the program can't stop after command "si".
(gdb) b 32
Breakpoint 2 at 0x8680: file git/gdb/testsuite/gdb.base/branch-to-self.c, line 32.
(gdb) c
Continuing.
Breakpoint 2, main () at gdb/git/gdb/testsuite/gdb.base/branch-to-self.c:32
32 asm (".Lhere: " BRANCH_INSN " .Lhere"); /* loop-line */
(gdb) si
infrun: clear_proceed_status_thread (Thread 3991.3991)
infrun: proceed (addr=0xffffffff, signal=GDB_SIGNAL_DEFAULT)
infrun: step-over queue now empty
infrun: resuming [Thread 3991.3991] for step-over
infrun: skipping breakpoint: stepping past insn at: 0x8680
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sending packet: $Z0,8678,4#f3...Packet received: OK
infrun: skipping breakpoint: stepping past insn at: 0x8680
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sending packet: $Z0,b6fe86c8,4#82...Packet received: OK
infrun: resume (step=1, signal=GDB_SIGNAL_0), trap_expected=1, current thread [Thread 3991.3991] at 0x868
breakpoint.c:should_be_inserted thinks the breakpoint shouldn't be
inserted, which is wrong. This patch restrict the condition that
only skip the non-single-step breakpoints if they are inserted at
the place we are stepping over, however we don't want to skip
single-step breakpoint if its thread is the thread we are stepping
over, so in this patch, I add a thread num in 'struct step_over_info'
to record the thread we're stepping over.
gdb:
2016-04-25 Yao Qi <yao.qi@linaro.org>
* breakpoint.c (should_be_inserted): Return 0 if the location's
owner is not single step breakpoint or single step breakpoint's
thread isn't the thread which is stepping past a breakpoint.
* gdbarch.sh (software_single_step): Update comments.
* gdbarch.h: Regenerated.
* infrun.c (struct step_over_info) <thread>: New field.
(set_step_over_info): New argument 'thread'. Callers updated.
(clear_step_over_info): Set field thread to -1.
(thread_is_stepping_over_breakpoint): New function.
* infrun.h (thread_is_stepping_over_breakpoint): Declaration.
|
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This comment is out of date. We've already done that. Patch is to remove
it.
gdb:
2016-03-23 Yao Qi <yao.qi@linaro.org>
* gdbarch.sh (software_single_step): Remove comments.
* gdbarch.h: Regenerated.
|
|
With Intel Memory Protection Extensions it was introduced the concept of
boundary violation. A boundary violations is presented to the inferior as
a segmentation fault having SIGCODE 3. This patch adds a
handler for a boundary violation extending the information displayed
when a bound violation is presented to the inferior. In the stop mode
case the debugger will also display the kind of violation: "upper" or
"lower", bounds and the address accessed.
On no stop mode the information will still remain unchanged. Additional
information about bound violations are not meaningful in that case user
does not know the line in which violation occurred as well.
When the segmentation fault handler is stop mode the out puts will be
changed as exemplified below.
The usual output of a segfault is:
Program received signal SIGSEGV, Segmentation fault
0x0000000000400d7c in upper (p=0x603010, a=0x603030, b=0x603050,
c=0x603070, d=0x603090, len=7) at i386-mpx-sigsegv.c:68
68 value = *(p + len);
In case it is a bound violation it will be presented as:
Program received signal SIGSEGV, Segmentation fault
Upper bound violation while accessing address 0x7fffffffc3b3
Bounds: [lower = 0x7fffffffc390, upper = 0x7fffffffc3a3]
0x0000000000400d7c in upper (p=0x603010, a=0x603030, b=0x603050,
c=0x603070, d=0x603090, len=7) at i386-mpx-sigsegv.c:68
68 value = *(p + len);
In mi mode the output of a segfault is:
*stopped,reason="signal-received",signal-name="SIGSEGV",
signal-meaning="Segmentation fault", frame={addr="0x0000000000400d7c",
func="upper",args=[{name="p", value="0x603010"},{name="a",value="0x603030"}
,{name="b",value="0x603050"}, {name="c",value="0x603070"},
{name="d",value="0x603090"},{name="len",value="7"}],
file="i386-mpx-sigsegv.c",fullname="i386-mpx-sigsegv.c",line="68"},
thread-id="1",stopped-threads="all",core="6"
in the case of a bound violation:
*stopped,reason="signal-received",signal-name="SIGSEGV",
signal-meaning="Segmentation fault",
sigcode-meaning="Upper bound violation",
lower-bound="0x603010",upper-bound="0x603023",bound-access="0x60302f",
frame={addr="0x0000000000400d7c",func="upper",args=[{name="p",
value="0x603010"},{name="a",value="0x603030"},{name="b",value="0x603050"},
{name="c",value="0x603070"},{name="d",value="0x603090"},
{name="len",value="7"}],file="i386-mpx-sigsegv.c",
fullname="i386-mpx-sigsegv.c",line="68"},thread-id="1",
stopped-threads="all",core="6"
2016-02-18 Walfred Tedeschi <walfred.tedeschi@intel.com>
gdb/ChangeLog:
* NEWS: Add entry for bound violation.
* amd64-linux-tdep.c (amd64_linux_init_abi_common):
Add handler for segmentation fault.
* gdbarch.sh (handle_segmentation_fault): New.
* gdbarch.c: Regenerate.
* gdbarch.h: Regenerate.
* i386-linux-tdep.c (i386_linux_handle_segmentation_fault): New.
(SIG_CODE_BONDARY_FAULT): New define.
(i386_linux_init_abi): Use i386_mpx_bound_violation_handler.
* i386-linux-tdep.h (i386_linux_handle_segmentation_fault) New.
* i386-tdep.c (i386_mpx_enabled): Add as external.
* i386-tdep.c (i386_mpx_enabled): Add as external.
* infrun.c (handle_segmentation_fault): New function.
(print_signal_received_reason): Use handle_segmentation_fault.
gdb/testsuite/ChangeLog:
* gdb.arch/i386-mpx-sigsegv.c: New file.
* gdb.arch/i386-mpx-sigsegv.exp: New file.
* gdb.arch/i386-mpx-simple_segv.c: New file.
* gdb.arch/i386-mpx-simple_segv.exp: New file.
gdb/doc/ChangeLog:
* gdb.texinfo (Signals): Add bound violation display hints for
a SIGSEGV.
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When we're looking at a tracefile trace frame where registers are not
available, and the tracepoint has only one location, we supply
the location's address as the PC register. However, this only works
if PC is not a pseudo register, and individual architectures may want
to guess more registers. Add a gdbarch hook that will handle that.
gdb/ChangeLog:
* arch-utils.c (default_guess_tracepoint_registers): New function.
* arch-utils.h (default_guess_tracepoint_registers): New prototype.
* gdbarch.c: Regenerate.
* gdbarch.h: Regenerate.
* gdbarch.sh: Add guess_tracepoint_registers hook.
* tracefile.c (tracefile_fetch_registers): Use the new gdbarch hook.
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Add a new gdbarch method to extract a thread name from a core for a
given thread. Use this new method in core_thread_name to implement the
to_thread_name target op.
gdb/ChangeLog:
* corelow.c (core_thread_name): New function.
(init_core_ops): Use "core_thread_name" for the "to_thread_name"
target op.
* gdbarch.sh (core_thread_name): New gdbarch callback.
* gdbarch.h: Re-generate.
* gdbarch.c: Re-generate.
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gdb/ChangeLog:
Update year range in copyright notice of all files.
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gdb/ChangeLog:
* dwarf2-frame.c (dwarf2_restore_rule): Call dwarf_reg_to_regnum
instead of gdbarch_dwarf2_reg_to_regnum.
(dwarf2_frame_cache): Ditto.
(read_addr_from_reg): Call dwarf_reg_to_regnum_or_error instead of
gdbarch_dwarf2_reg_to_regnum.
(get_reg_value): Ditto.
(dwarf2_fetch_cfa_info): Ditto.
(dwarf2_frame_prev_register): Ditto.
* dwarf2loc.c: #include "complaints.h".
(dwarf_expr_read_addr_from_reg): Call dwarf_reg_to_regnum_or_error
instead of gdbarch_dwarf2_reg_to_regnum.
(dwarf_expr_get_reg_value): Ditto.
(read_pieced_value): Ditto.
(write_pieced_value): Ditto.
(dwarf2_evaluate_loc_desc_full): Ditto.
(dwarf_reg_to_regnum): New function.
(throw_bad_regnum_error): New function.
(dwarf_reg_to_regnum_or_error): Renamed from
dwarf2_reg_to_regnum_or_errorChange to take a ULONGEST regnum.
All callers updated. Call throw_bad_regnum_error.
(locexpr_regname): Improve text of bad register number.
* dwarf2loc.h (dwarf_reg_to_regnum): Declare.
(dwarf_reg_to_regnum_or_error): Update prototype.
* dwarf2expr.c: #include "dwarf2loc.h".
(dwarf_block_to_sp_offset): Call dwarf_reg_to_regnum instead of
gdbarch_dwarf2_reg_to_regnum.
* gdbarch.sh (dwarf2_reg_to_regnum): Add comment.
* gdbarch.h: Regenerate.
* amd64-tdep.c (amd64_dwarf_reg_to_regnum): Remove warning for bad
register.
* avr-tdep.c (avr_dwarf_reg_to_regnum): Ditto.
* cris-tdep.c (cris_dwarf2_reg_to_regnum): Ditto.
* bfin-tdep.c (bfin_reg_to_regnum): Fix error checking.
* hppa-linux-tdep.c (hppa_dwarf_reg_to_regnum): Improve error checking.
Remove warning for bad register.
* hppa-tdep.c (hppa64_dwarf_reg_to_regnum): Ditto.
* i386-tdep.c (i386_svr4_dwarf_reg_to_regnum): Renamed from
i386_svr4_reg_to_regnum. Return -1 for bad registers.
(i386_svr4_reg_to_regnum): New function.
(i386_gdbarch_init): Update call to set_gdbarch_dwarf2_reg_to_regnum.
* microblaze-tdep.c (microblaze_dwarf2_reg_to_regnum): Don't assert
on bad registers, return -1.
* msp430-tdep.c (msp430_dwarf2_reg_to_regnum): Improve error checking.
Remove warning for bad register.
* nios2-tdep.c: Add static assert for NIOS2_NUM_REGS.
(nios2_dwarf_reg_to_regnum): Fix off-by-one error.
Remove warning for bad register. Return -1 for bad register.
* rl78-tdep.c (rl78_dwarf_reg_to_regnum): Don't flag an internal error
for bad register, return -1.
* rx-tdep.c (rx_dwarf_reg_to_regnum): Ditto.
* m68k-tdep.c (m68k_dwarf_reg_to_regnum): Fix error result.
* mep-tdep.c (mep_debug_reg_to_regnum): Ditto.
* mips-tdep.c (mips_stab_reg_to_regnum): Ditto.
(mips_dwarf_dwarf2_ecoff_reg_to_regnum): Ditto.
* mn10300-tdep.c (mn10300_dwarf2_reg_to_regnum): Remove warning
for bad regs.
* xtensa-tdep.c (xtensa_reg_to_regnum): Remove internal error for
bad regs. Fix error result.
* stabsread.c (stab_reg_to_regnum): Watch for negative regno.
(reg_value_complaint): Update complaint text.
* mdebugread.c (reg_value_complaint): New function.
(mdebug_reg_to_regnum): Rewrite to watch for bad reg numbers.
gdb/testsuite/ChangeLog:
* lib/dwarf.exp (_location): Add support for DW_OP_regx.
* gdb.dwarf2/bad-regnum.c: New file.
* gdb.dwarf2/bad-regnum.exp: New file.
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gdb/ChangeLog:
* gdbarch.sh (core_regset_section): Remove.
* gdbarch.h: Regenerate.
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As reported by Ulrich here:
https://sourceware.org/ml/gdb-patches/2015-09/msg00604.html
The system compiler (gcc 4.1) in Centos 5 doesn't like that we cast to a
pointer to a type that doesn't exist. I see no real value in using this
kind iof construct over just using void *. So this patch changes the
tdep_info field to void * and removes the casts. Even in C++, we
should not need an explicit cast when assigning to a void *.
gdb/ChangeLog:
* gdbarch.sh (struct gdbarch_info): Change tdep_info's type to void *.
* gdbarch.h: Regenerate.
* i386-tdep.c (i386_gdbarch_init): Remove cast to
struct gdbarch_tdep_info *.
* mips-tdep.c (mips_gdbarch_init): Likewise.
* ppc-linux-tdep (ppu2spu_sniffer): Likewise.
* rs6000-tdep.c (rs6000_gdbarch_init): Likewise.
* spu-multiarch.c (spu_gdbarch): Likewise.
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Since the type whose name is being set is now being allocated on the
gdbarch obstack, we should allocate its TYPE_NAME on the obstack too.
This reduces the number of individual valgrind warnings for the command
"gdb gdb" from ~300 to ~150.
Tested on x86_64-unknown-linux-gnu.
gdb/ChangeLog:
* gdb_obstack.h (obstack_strdup): Declare.
* gdb_obstack.c (obstack_strdup): Define.
* gdbarch.sh (gdbarch_obstack_strdup): Declare and define.
* gdbarch.c: Regenerate.
* gdbarch.h: Regenerate.
* gdbtypes.c (arch_type): Use gdbarch_obstack_strdup.
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