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binutils-gdb/gdb/i386-darwin-nat.c
Simon Marchi 6c2659886f gdb: add back declarations for _initialize functions 
I'd like to enable the -Wmissing-declarations warning.  However, it
warns for every _initialize function, for example:

      CXX    dcache.o
    /home/smarchi/src/binutils-gdb/gdb/dcache.c: In function ‘void _initialize_dcache()’:
    /home/smarchi/src/binutils-gdb/gdb/dcache.c:688:1: error: no previous declaration for ‘void _initialize_dcache()’ [-Werror=missing-declarations]
     _initialize_dcache (void)
     ^~~~~~~~~~~~~~~~~~

The only practical way forward I found is to add back the declarations,
which were removed by this commit:

    commit 481695ed5f
    Author: John Baldwin <jhb@FreeBSD.org>
    Date:   Sat Sep 9 11:02:37 2017 -0700

        Remove unnecessary function prototypes.

I don't think it's a big problem to have the declarations for these
functions, but if anybody has a better solution for this, I'll be happy
to use it.

gdb/ChangeLog:

	* aarch64-fbsd-nat.c (_initialize_aarch64_fbsd_nat): Add declaration.
	* aarch64-fbsd-tdep.c (_initialize_aarch64_fbsd_tdep): Add declaration.
	* aarch64-linux-nat.c (_initialize_aarch64_linux_nat): Add declaration.
	* aarch64-linux-tdep.c (_initialize_aarch64_linux_tdep): Add declaration.
	* aarch64-newlib-tdep.c (_initialize_aarch64_newlib_tdep): Add declaration.
	* aarch64-tdep.c (_initialize_aarch64_tdep): Add declaration.
	* ada-exp.y (_initialize_ada_exp): Add declaration.
	* ada-lang.c (_initialize_ada_language): Add declaration.
	* ada-tasks.c (_initialize_tasks): Add declaration.
	* agent.c (_initialize_agent): Add declaration.
	* aix-thread.c (_initialize_aix_thread): Add declaration.
	* alpha-bsd-nat.c (_initialize_alphabsd_nat): Add declaration.
	* alpha-linux-nat.c (_initialize_alpha_linux_nat): Add declaration.
	* alpha-linux-tdep.c (_initialize_alpha_linux_tdep): Add declaration.
	* alpha-nbsd-tdep.c (_initialize_alphanbsd_tdep): Add declaration.
	* alpha-obsd-tdep.c (_initialize_alphaobsd_tdep): Add declaration.
	* alpha-tdep.c (_initialize_alpha_tdep): Add declaration.
	* amd64-darwin-tdep.c (_initialize_amd64_darwin_tdep): Add declaration.
	* amd64-dicos-tdep.c (_initialize_amd64_dicos_tdep): Add declaration.
	* amd64-fbsd-nat.c (_initialize_amd64fbsd_nat): Add declaration.
	* amd64-fbsd-tdep.c (_initialize_amd64fbsd_tdep): Add declaration.
	* amd64-linux-nat.c (_initialize_amd64_linux_nat): Add declaration.
	* amd64-linux-tdep.c (_initialize_amd64_linux_tdep): Add declaration.
	* amd64-nbsd-nat.c (_initialize_amd64nbsd_nat): Add declaration.
	* amd64-nbsd-tdep.c (_initialize_amd64nbsd_tdep): Add declaration.
	* amd64-obsd-nat.c (_initialize_amd64obsd_nat): Add declaration.
	* amd64-obsd-tdep.c (_initialize_amd64obsd_tdep): Add declaration.
	* amd64-sol2-tdep.c (_initialize_amd64_sol2_tdep): Add declaration.
	* amd64-tdep.c (_initialize_amd64_tdep): Add declaration.
	* amd64-windows-nat.c (_initialize_amd64_windows_nat): Add declaration.
	* amd64-windows-tdep.c (_initialize_amd64_windows_tdep): Add declaration.
	* annotate.c (_initialize_annotate): Add declaration.
	* arc-newlib-tdep.c (_initialize_arc_newlib_tdep): Add declaration.
	* arc-tdep.c (_initialize_arc_tdep): Add declaration.
	* arch-utils.c (_initialize_gdbarch_utils): Add declaration.
	* arm-fbsd-nat.c (_initialize_arm_fbsd_nat): Add declaration.
	* arm-fbsd-tdep.c (_initialize_arm_fbsd_tdep): Add declaration.
	* arm-linux-nat.c (_initialize_arm_linux_nat): Add declaration.
	* arm-linux-tdep.c (_initialize_arm_linux_tdep): Add declaration.
	* arm-nbsd-nat.c (_initialize_arm_netbsd_nat): Add declaration.
	* arm-nbsd-tdep.c (_initialize_arm_netbsd_tdep): Add declaration.
	* arm-obsd-tdep.c (_initialize_armobsd_tdep): Add declaration.
	* arm-pikeos-tdep.c (_initialize_arm_pikeos_tdep): Add declaration.
	* arm-symbian-tdep.c (_initialize_arm_symbian_tdep): Add declaration.
	* arm-tdep.c (_initialize_arm_tdep): Add declaration.
	* arm-wince-tdep.c (_initialize_arm_wince_tdep): Add declaration.
	* auto-load.c (_initialize_auto_load): Add declaration.
	* auxv.c (_initialize_auxv): Add declaration.
	* avr-tdep.c (_initialize_avr_tdep): Add declaration.
	* ax-gdb.c (_initialize_ax_gdb): Add declaration.
	* bfin-linux-tdep.c (_initialize_bfin_linux_tdep): Add declaration.
	* bfin-tdep.c (_initialize_bfin_tdep): Add declaration.
	* break-catch-sig.c (_initialize_break_catch_sig): Add declaration.
	* break-catch-syscall.c (_initialize_break_catch_syscall): Add declaration.
	* break-catch-throw.c (_initialize_break_catch_throw): Add declaration.
	* breakpoint.c (_initialize_breakpoint): Add declaration.
	* bsd-uthread.c (_initialize_bsd_uthread): Add declaration.
	* btrace.c (_initialize_btrace): Add declaration.
	* charset.c (_initialize_charset): Add declaration.
	* cli/cli-cmds.c (_initialize_cli_cmds): Add declaration.
	* cli/cli-dump.c (_initialize_cli_dump): Add declaration.
	* cli/cli-interp.c (_initialize_cli_interp): Add declaration.
	* cli/cli-logging.c (_initialize_cli_logging): Add declaration.
	* cli/cli-script.c (_initialize_cli_script): Add declaration.
	* cli/cli-style.c (_initialize_cli_style): Add declaration.
	* coff-pe-read.c (_initialize_coff_pe_read): Add declaration.
	* coffread.c (_initialize_coffread): Add declaration.
	* compile/compile-cplus-types.c (_initialize_compile_cplus_types): Add declaration.
	* compile/compile.c (_initialize_compile): Add declaration.
	* complaints.c (_initialize_complaints): Add declaration.
	* completer.c (_initialize_completer): Add declaration.
	* copying.c (_initialize_copying): Add declaration.
	* corefile.c (_initialize_core): Add declaration.
	* corelow.c (_initialize_corelow): Add declaration.
	* cp-abi.c (_initialize_cp_abi): Add declaration.
	* cp-namespace.c (_initialize_cp_namespace): Add declaration.
	* cp-support.c (_initialize_cp_support): Add declaration.
	* cp-valprint.c (_initialize_cp_valprint): Add declaration.
	* cris-linux-tdep.c (_initialize_cris_linux_tdep): Add declaration.
	* cris-tdep.c (_initialize_cris_tdep): Add declaration.
	* csky-linux-tdep.c (_initialize_csky_linux_tdep): Add declaration.
	* csky-tdep.c (_initialize_csky_tdep): Add declaration.
	* ctfread.c (_initialize_ctfread): Add declaration.
	* d-lang.c (_initialize_d_language): Add declaration.
	* darwin-nat-info.c (_initialize_darwin_info_commands): Add declaration.
	* darwin-nat.c (_initialize_darwin_nat): Add declaration.
	* dbxread.c (_initialize_dbxread): Add declaration.
	* dcache.c (_initialize_dcache): Add declaration.
	* disasm-selftests.c (_initialize_disasm_selftests): Add declaration.
	* disasm.c (_initialize_disasm): Add declaration.
	* dtrace-probe.c (_initialize_dtrace_probe): Add declaration.
	* dummy-frame.c (_initialize_dummy_frame): Add declaration.
	* dwarf-index-cache.c (_initialize_index_cache): Add declaration.
	* dwarf-index-write.c (_initialize_dwarf_index_write): Add declaration.
	* dwarf2-frame-tailcall.c (_initialize_tailcall_frame): Add declaration.
	* dwarf2-frame.c (_initialize_dwarf2_frame): Add declaration.
	* dwarf2expr.c (_initialize_dwarf2expr): Add declaration.
	* dwarf2loc.c (_initialize_dwarf2loc): Add declaration.
	* dwarf2read.c (_initialize_dwarf2_read): Add declaration.
	* elfread.c (_initialize_elfread): Add declaration.
	* exec.c (_initialize_exec): Add declaration.
	* extension.c (_initialize_extension): Add declaration.
	* f-lang.c (_initialize_f_language): Add declaration.
	* f-valprint.c (_initialize_f_valprint): Add declaration.
	* fbsd-nat.c (_initialize_fbsd_nat): Add declaration.
	* fbsd-tdep.c (_initialize_fbsd_tdep): Add declaration.
	* filesystem.c (_initialize_filesystem): Add declaration.
	* findcmd.c (_initialize_mem_search): Add declaration.
	* findvar.c (_initialize_findvar): Add declaration.
	* fork-child.c (_initialize_fork_child): Add declaration.
	* frame-base.c (_initialize_frame_base): Add declaration.
	* frame-unwind.c (_initialize_frame_unwind): Add declaration.
	* frame.c (_initialize_frame): Add declaration.
	* frv-linux-tdep.c (_initialize_frv_linux_tdep): Add declaration.
	* frv-tdep.c (_initialize_frv_tdep): Add declaration.
	* ft32-tdep.c (_initialize_ft32_tdep): Add declaration.
	* gcore.c (_initialize_gcore): Add declaration.
	* gdb-demangle.c (_initialize_gdb_demangle): Add declaration.
	* gdb_bfd.c (_initialize_gdb_bfd): Add declaration.
	* gdbarch-selftests.c (_initialize_gdbarch_selftests): Add declaration.
	* gdbarch.c (_initialize_gdbarch): Add declaration.
	* gdbtypes.c (_initialize_gdbtypes): Add declaration.
	* gnu-nat.c (_initialize_gnu_nat): Add declaration.
	* gnu-v2-abi.c (_initialize_gnu_v2_abi): Add declaration.
	* gnu-v3-abi.c (_initialize_gnu_v3_abi): Add declaration.
	* go-lang.c (_initialize_go_language): Add declaration.
	* go32-nat.c (_initialize_go32_nat): Add declaration.
	* guile/guile.c (_initialize_guile): Add declaration.
	* h8300-tdep.c (_initialize_h8300_tdep): Add declaration.
	* hppa-linux-nat.c (_initialize_hppa_linux_nat): Add declaration.
	* hppa-linux-tdep.c (_initialize_hppa_linux_tdep): Add declaration.
	* hppa-nbsd-nat.c (_initialize_hppanbsd_nat): Add declaration.
	* hppa-nbsd-tdep.c (_initialize_hppanbsd_tdep): Add declaration.
	* hppa-obsd-nat.c (_initialize_hppaobsd_nat): Add declaration.
	* hppa-obsd-tdep.c (_initialize_hppabsd_tdep): Add declaration.
	* hppa-tdep.c (_initialize_hppa_tdep): Add declaration.
	* i386-bsd-nat.c (_initialize_i386bsd_nat): Add declaration.
	* i386-cygwin-tdep.c (_initialize_i386_cygwin_tdep): Add declaration.
	* i386-darwin-nat.c (_initialize_i386_darwin_nat): Add declaration.
	* i386-darwin-tdep.c (_initialize_i386_darwin_tdep): Add declaration.
	* i386-dicos-tdep.c (_initialize_i386_dicos_tdep): Add declaration.
	* i386-fbsd-nat.c (_initialize_i386fbsd_nat): Add declaration.
	* i386-fbsd-tdep.c (_initialize_i386fbsd_tdep): Add declaration.
	* i386-gnu-nat.c (_initialize_i386gnu_nat): Add declaration.
	* i386-gnu-tdep.c (_initialize_i386gnu_tdep): Add declaration.
	* i386-go32-tdep.c (_initialize_i386_go32_tdep): Add declaration.
	* i386-linux-nat.c (_initialize_i386_linux_nat): Add declaration.
	* i386-linux-tdep.c (_initialize_i386_linux_tdep): Add declaration.
	* i386-nbsd-nat.c (_initialize_i386nbsd_nat): Add declaration.
	* i386-nbsd-tdep.c (_initialize_i386nbsd_tdep): Add declaration.
	* i386-nto-tdep.c (_initialize_i386nto_tdep): Add declaration.
	* i386-obsd-nat.c (_initialize_i386obsd_nat): Add declaration.
	* i386-obsd-tdep.c (_initialize_i386obsd_tdep): Add declaration.
	* i386-sol2-nat.c (_initialize_amd64_sol2_nat): Add declaration.
	* i386-sol2-tdep.c (_initialize_i386_sol2_tdep): Add declaration.
	* i386-tdep.c (_initialize_i386_tdep): Add declaration.
	* i386-windows-nat.c (_initialize_i386_windows_nat): Add declaration.
	* ia64-libunwind-tdep.c (_initialize_libunwind_frame): Add declaration.
	* ia64-linux-nat.c (_initialize_ia64_linux_nat): Add declaration.
	* ia64-linux-tdep.c (_initialize_ia64_linux_tdep): Add declaration.
	* ia64-tdep.c (_initialize_ia64_tdep): Add declaration.
	* ia64-vms-tdep.c (_initialize_ia64_vms_tdep): Add declaration.
	* infcall.c (_initialize_infcall): Add declaration.
	* infcmd.c (_initialize_infcmd): Add declaration.
	* inflow.c (_initialize_inflow): Add declaration.
	* infrun.c (_initialize_infrun): Add declaration.
	* interps.c (_initialize_interpreter): Add declaration.
	* iq2000-tdep.c (_initialize_iq2000_tdep): Add declaration.
	* jit.c (_initialize_jit): Add declaration.
	* language.c (_initialize_language): Add declaration.
	* linux-fork.c (_initialize_linux_fork): Add declaration.
	* linux-nat.c (_initialize_linux_nat): Add declaration.
	* linux-tdep.c (_initialize_linux_tdep): Add declaration.
	* linux-thread-db.c (_initialize_thread_db): Add declaration.
	* lm32-tdep.c (_initialize_lm32_tdep): Add declaration.
	* m2-lang.c (_initialize_m2_language): Add declaration.
	* m32c-tdep.c (_initialize_m32c_tdep): Add declaration.
	* m32r-linux-nat.c (_initialize_m32r_linux_nat): Add declaration.
	* m32r-linux-tdep.c (_initialize_m32r_linux_tdep): Add declaration.
	* m32r-tdep.c (_initialize_m32r_tdep): Add declaration.
	* m68hc11-tdep.c (_initialize_m68hc11_tdep): Add declaration.
	* m68k-bsd-nat.c (_initialize_m68kbsd_nat): Add declaration.
	* m68k-bsd-tdep.c (_initialize_m68kbsd_tdep): Add declaration.
	* m68k-linux-nat.c (_initialize_m68k_linux_nat): Add declaration.
	* m68k-linux-tdep.c (_initialize_m68k_linux_tdep): Add declaration.
	* m68k-tdep.c (_initialize_m68k_tdep): Add declaration.
	* machoread.c (_initialize_machoread): Add declaration.
	* macrocmd.c (_initialize_macrocmd): Add declaration.
	* macroscope.c (_initialize_macroscope): Add declaration.
	* maint-test-options.c (_initialize_maint_test_options): Add declaration.
	* maint-test-settings.c (_initialize_maint_test_settings): Add declaration.
	* maint.c (_initialize_maint_cmds): Add declaration.
	* mdebugread.c (_initialize_mdebugread): Add declaration.
	* memattr.c (_initialize_mem): Add declaration.
	* mep-tdep.c (_initialize_mep_tdep): Add declaration.
	* mi/mi-cmd-env.c (_initialize_mi_cmd_env): Add declaration.
	* mi/mi-cmds.c (_initialize_mi_cmds): Add declaration.
	* mi/mi-interp.c (_initialize_mi_interp): Add declaration.
	* mi/mi-main.c (_initialize_mi_main): Add declaration.
	* microblaze-linux-tdep.c (_initialize_microblaze_linux_tdep): Add declaration.
	* microblaze-tdep.c (_initialize_microblaze_tdep): Add declaration.
	* mips-fbsd-nat.c (_initialize_mips_fbsd_nat): Add declaration.
	* mips-fbsd-tdep.c (_initialize_mips_fbsd_tdep): Add declaration.
	* mips-linux-nat.c (_initialize_mips_linux_nat): Add declaration.
	* mips-linux-tdep.c (_initialize_mips_linux_tdep): Add declaration.
	* mips-nbsd-nat.c (_initialize_mipsnbsd_nat): Add declaration.
	* mips-nbsd-tdep.c (_initialize_mipsnbsd_tdep): Add declaration.
	* mips-sde-tdep.c (_initialize_mips_sde_tdep): Add declaration.
	* mips-tdep.c (_initialize_mips_tdep): Add declaration.
	* mips64-obsd-nat.c (_initialize_mips64obsd_nat): Add declaration.
	* mips64-obsd-tdep.c (_initialize_mips64obsd_tdep): Add declaration.
	* mipsread.c (_initialize_mipsread): Add declaration.
	* mn10300-linux-tdep.c (_initialize_mn10300_linux_tdep): Add declaration.
	* mn10300-tdep.c (_initialize_mn10300_tdep): Add declaration.
	* moxie-tdep.c (_initialize_moxie_tdep): Add declaration.
	* msp430-tdep.c (_initialize_msp430_tdep): Add declaration.
	* nds32-tdep.c (_initialize_nds32_tdep): Add declaration.
	* nios2-linux-tdep.c (_initialize_nios2_linux_tdep): Add declaration.
	* nios2-tdep.c (_initialize_nios2_tdep): Add declaration.
	* nto-procfs.c (_initialize_procfs): Add declaration.
	* objc-lang.c (_initialize_objc_language): Add declaration.
	* observable.c (_initialize_observer): Add declaration.
	* opencl-lang.c (_initialize_opencl_language): Add declaration.
	* or1k-linux-tdep.c (_initialize_or1k_linux_tdep): Add declaration.
	* or1k-tdep.c (_initialize_or1k_tdep): Add declaration.
	* osabi.c (_initialize_gdb_osabi): Add declaration.
	* osdata.c (_initialize_osdata): Add declaration.
	* p-valprint.c (_initialize_pascal_valprint): Add declaration.
	* parse.c (_initialize_parse): Add declaration.
	* ppc-fbsd-nat.c (_initialize_ppcfbsd_nat): Add declaration.
	* ppc-fbsd-tdep.c (_initialize_ppcfbsd_tdep): Add declaration.
	* ppc-linux-nat.c (_initialize_ppc_linux_nat): Add declaration.
	* ppc-linux-tdep.c (_initialize_ppc_linux_tdep): Add declaration.
	* ppc-nbsd-nat.c (_initialize_ppcnbsd_nat): Add declaration.
	* ppc-nbsd-tdep.c (_initialize_ppcnbsd_tdep): Add declaration.
	* ppc-obsd-nat.c (_initialize_ppcobsd_nat): Add declaration.
	* ppc-obsd-tdep.c (_initialize_ppcobsd_tdep): Add declaration.
	* printcmd.c (_initialize_printcmd): Add declaration.
	* probe.c (_initialize_probe): Add declaration.
	* proc-api.c (_initialize_proc_api): Add declaration.
	* proc-events.c (_initialize_proc_events): Add declaration.
	* proc-service.c (_initialize_proc_service): Add declaration.
	* procfs.c (_initialize_procfs): Add declaration.
	* producer.c (_initialize_producer): Add declaration.
	* psymtab.c (_initialize_psymtab): Add declaration.
	* python/python.c (_initialize_python): Add declaration.
	* ravenscar-thread.c (_initialize_ravenscar): Add declaration.
	* record-btrace.c (_initialize_record_btrace): Add declaration.
	* record-full.c (_initialize_record_full): Add declaration.
	* record.c (_initialize_record): Add declaration.
	* regcache-dump.c (_initialize_regcache_dump): Add declaration.
	* regcache.c (_initialize_regcache): Add declaration.
	* reggroups.c (_initialize_reggroup): Add declaration.
	* remote-notif.c (_initialize_notif): Add declaration.
	* remote-sim.c (_initialize_remote_sim): Add declaration.
	* remote.c (_initialize_remote): Add declaration.
	* reverse.c (_initialize_reverse): Add declaration.
	* riscv-fbsd-nat.c (_initialize_riscv_fbsd_nat): Add declaration.
	* riscv-fbsd-tdep.c (_initialize_riscv_fbsd_tdep): Add declaration.
	* riscv-linux-nat.c (_initialize_riscv_linux_nat): Add declaration.
	* riscv-linux-tdep.c (_initialize_riscv_linux_tdep): Add declaration.
	* riscv-tdep.c (_initialize_riscv_tdep): Add declaration.
	* rl78-tdep.c (_initialize_rl78_tdep): Add declaration.
	* rs6000-aix-tdep.c (_initialize_rs6000_aix_tdep): Add declaration.
	* rs6000-lynx178-tdep.c (_initialize_rs6000_lynx178_tdep):
	Add declaration.
	* rs6000-nat.c (_initialize_rs6000_nat): Add declaration.
	* rs6000-tdep.c (_initialize_rs6000_tdep): Add declaration.
	* run-on-main-thread.c (_initialize_run_on_main_thread): Add declaration.
	* rust-exp.y (_initialize_rust_exp): Add declaration.
	* rx-tdep.c (_initialize_rx_tdep): Add declaration.
	* s12z-tdep.c (_initialize_s12z_tdep): Add declaration.
	* s390-linux-nat.c (_initialize_s390_nat): Add declaration.
	* s390-linux-tdep.c (_initialize_s390_linux_tdep): Add declaration.
	* s390-tdep.c (_initialize_s390_tdep): Add declaration.
	* score-tdep.c (_initialize_score_tdep): Add declaration.
	* ser-go32.c (_initialize_ser_dos): Add declaration.
	* ser-mingw.c (_initialize_ser_windows): Add declaration.
	* ser-pipe.c (_initialize_ser_pipe): Add declaration.
	* ser-tcp.c (_initialize_ser_tcp): Add declaration.
	* ser-uds.c (_initialize_ser_socket): Add declaration.
	* ser-unix.c (_initialize_ser_hardwire): Add declaration.
	* serial.c (_initialize_serial): Add declaration.
	* sh-linux-tdep.c (_initialize_sh_linux_tdep): Add declaration.
	* sh-nbsd-nat.c (_initialize_shnbsd_nat): Add declaration.
	* sh-nbsd-tdep.c (_initialize_shnbsd_tdep): Add declaration.
	* sh-tdep.c (_initialize_sh_tdep): Add declaration.
	* skip.c (_initialize_step_skip): Add declaration.
	* sol-thread.c (_initialize_sol_thread): Add declaration.
	* solib-aix.c (_initialize_solib_aix): Add declaration.
	* solib-darwin.c (_initialize_darwin_solib): Add declaration.
	* solib-dsbt.c (_initialize_dsbt_solib): Add declaration.
	* solib-frv.c (_initialize_frv_solib): Add declaration.
	* solib-svr4.c (_initialize_svr4_solib): Add declaration.
	* solib-target.c (_initialize_solib_target): Add declaration.
	* solib.c (_initialize_solib): Add declaration.
	* source-cache.c (_initialize_source_cache): Add declaration.
	* source.c (_initialize_source): Add declaration.
	* sparc-linux-nat.c (_initialize_sparc_linux_nat): Add declaration.
	* sparc-linux-tdep.c (_initialize_sparc_linux_tdep): Add declaration.
	* sparc-nat.c (_initialize_sparc_nat): Add declaration.
	* sparc-nbsd-nat.c (_initialize_sparcnbsd_nat): Add declaration.
	* sparc-nbsd-tdep.c (_initialize_sparcnbsd_tdep): Add declaration.
	* sparc-obsd-tdep.c (_initialize_sparc32obsd_tdep): Add declaration.
	* sparc-sol2-tdep.c (_initialize_sparc_sol2_tdep): Add declaration.
	* sparc-tdep.c (_initialize_sparc_tdep): Add declaration.
	* sparc64-fbsd-nat.c (_initialize_sparc64fbsd_nat): Add declaration.
	* sparc64-fbsd-tdep.c (_initialize_sparc64fbsd_tdep): Add declaration.
	* sparc64-linux-nat.c (_initialize_sparc64_linux_nat): Add declaration.
	* sparc64-linux-tdep.c (_initialize_sparc64_linux_tdep): Add declaration.
	* sparc64-nat.c (_initialize_sparc64_nat): Add declaration.
	* sparc64-nbsd-nat.c (_initialize_sparc64nbsd_nat): Add declaration.
	* sparc64-nbsd-tdep.c (_initialize_sparc64nbsd_tdep): Add declaration.
	* sparc64-obsd-nat.c (_initialize_sparc64obsd_nat): Add declaration.
	* sparc64-obsd-tdep.c (_initialize_sparc64obsd_tdep): Add declaration.
	* sparc64-sol2-tdep.c (_initialize_sparc64_sol2_tdep): Add declaration.
	* sparc64-tdep.c (_initialize_sparc64_adi_tdep): Add declaration.
	* stabsread.c (_initialize_stabsread): Add declaration.
	* stack.c (_initialize_stack): Add declaration.
	* stap-probe.c (_initialize_stap_probe): Add declaration.
	* std-regs.c (_initialize_frame_reg): Add declaration.
	* symfile-debug.c (_initialize_symfile_debug): Add declaration.
	* symfile-mem.c (_initialize_symfile_mem): Add declaration.
	* symfile.c (_initialize_symfile): Add declaration.
	* symmisc.c (_initialize_symmisc): Add declaration.
	* symtab.c (_initialize_symtab): Add declaration.
	* target.c (_initialize_target): Add declaration.
	* target-connection.c (_initialize_target_connection): Add
	declaration.
	* target-dcache.c (_initialize_target_dcache): Add declaration.
	* target-descriptions.c (_initialize_target_descriptions): Add declaration.
	* thread.c (_initialize_thread): Add declaration.
	* tic6x-linux-tdep.c (_initialize_tic6x_linux_tdep): Add declaration.
	* tic6x-tdep.c (_initialize_tic6x_tdep): Add declaration.
	* tilegx-linux-nat.c (_initialize_tile_linux_nat): Add declaration.
	* tilegx-linux-tdep.c (_initialize_tilegx_linux_tdep): Add declaration.
	* tilegx-tdep.c (_initialize_tilegx_tdep): Add declaration.
	* tracectf.c (_initialize_ctf): Add declaration.
	* tracefile-tfile.c (_initialize_tracefile_tfile): Add declaration.
	* tracefile.c (_initialize_tracefile): Add declaration.
	* tracepoint.c (_initialize_tracepoint): Add declaration.
	* tui/tui-hooks.c (_initialize_tui_hooks): Add declaration.
	* tui/tui-interp.c (_initialize_tui_interp): Add declaration.
	* tui/tui-layout.c (_initialize_tui_layout): Add declaration.
	* tui/tui-regs.c (_initialize_tui_regs): Add declaration.
	* tui/tui-stack.c (_initialize_tui_stack): Add declaration.
	* tui/tui-win.c (_initialize_tui_win): Add declaration.
	* tui/tui.c (_initialize_tui): Add declaration.
	* typeprint.c (_initialize_typeprint): Add declaration.
	* ui-style.c (_initialize_ui_style): Add declaration.
	* unittests/array-view-selftests.c (_initialize_array_view_selftests): Add declaration.
	* unittests/child-path-selftests.c (_initialize_child_path_selftests): Add declaration.
	* unittests/cli-utils-selftests.c (_initialize_cli_utils_selftests): Add declaration.
	* unittests/common-utils-selftests.c (_initialize_common_utils_selftests): Add declaration.
	* unittests/copy_bitwise-selftests.c (_initialize_copy_bitwise_utils_selftests): Add declaration.
	* unittests/environ-selftests.c (_initialize_environ_selftests): Add declaration.
	* unittests/filtered_iterator-selftests.c
	(_initialize_filtered_iterator_selftests): Add declaration.
	* unittests/format_pieces-selftests.c (_initialize_format_pieces_selftests): Add declaration.
	* unittests/function-view-selftests.c (_initialize_function_view_selftests): Add declaration.
	* unittests/help-doc-selftests.c (_initialize_help_doc_selftests): Add declaration.
	* unittests/lookup_name_info-selftests.c (_initialize_lookup_name_info_selftests): Add declaration.
	* unittests/main-thread-selftests.c
	(_initialize_main_thread_selftests): Add declaration.
	* unittests/memory-map-selftests.c (_initialize_memory_map_selftests): Add declaration.
	* unittests/memrange-selftests.c (_initialize_memrange_selftests): Add declaration.
	* unittests/mkdir-recursive-selftests.c (_initialize_mkdir_recursive_selftests): Add declaration.
	* unittests/observable-selftests.c (_initialize_observer_selftest): Add declaration.
	* unittests/offset-type-selftests.c (_initialize_offset_type_selftests): Add declaration.
	* unittests/optional-selftests.c (_initialize_optional_selftests): Add declaration.
	* unittests/parse-connection-spec-selftests.c (_initialize_parse_connection_spec_selftests): Add declaration.
	* unittests/rsp-low-selftests.c (_initialize_rsp_low_selftests): Add declaration.
	* unittests/scoped_fd-selftests.c (_initialize_scoped_fd_selftests): Add declaration.
	* unittests/scoped_mmap-selftests.c (_initialize_scoped_mmap_selftests): Add declaration.
	* unittests/scoped_restore-selftests.c (_initialize_scoped_restore_selftests): Add declaration.
	* unittests/string_view-selftests.c (_initialize_string_view_selftests): Add declaration.
	* unittests/style-selftests.c (_initialize_style_selftest): Add declaration.
	* unittests/tracepoint-selftests.c (_initialize_tracepoint_selftests): Add declaration.
	* unittests/tui-selftests.c (_initialize_tui_selftest): Add
	declaration.
	* unittests/unpack-selftests.c (_initialize_unpack_selftests): Add declaration.
	* unittests/utils-selftests.c (_initialize_utils_selftests): Add declaration.
	* unittests/vec-utils-selftests.c (_initialize_vec_utils_selftests): Add declaration.
	* unittests/xml-utils-selftests.c (_initialize_xml_utils): Add declaration.
	* user-regs.c (_initialize_user_regs): Add declaration.
	* utils.c (_initialize_utils): Add declaration.
	* v850-tdep.c (_initialize_v850_tdep): Add declaration.
	* valops.c (_initialize_valops): Add declaration.
	* valprint.c (_initialize_valprint): Add declaration.
	* value.c (_initialize_values): Add declaration.
	* varobj.c (_initialize_varobj): Add declaration.
	* vax-bsd-nat.c (_initialize_vaxbsd_nat): Add declaration.
	* vax-nbsd-tdep.c (_initialize_vaxnbsd_tdep): Add declaration.
	* vax-tdep.c (_initialize_vax_tdep): Add declaration.
	* windows-nat.c (_initialize_windows_nat): Add declaration.
	(_initialize_check_for_gdb_ini): Add declaration.
	(_initialize_loadable): Add declaration.
	* windows-tdep.c (_initialize_windows_tdep): Add declaration.
	* x86-bsd-nat.c (_initialize_x86_bsd_nat): Add declaration.
	* x86-linux-nat.c (_initialize_x86_linux_nat): Add declaration.
	* xcoffread.c (_initialize_xcoffread): Add declaration.
	* xml-support.c (_initialize_xml_support): Add declaration.
	* xstormy16-tdep.c (_initialize_xstormy16_tdep): Add declaration.
	* xtensa-linux-nat.c (_initialize_xtensa_linux_nat): Add declaration.
	* xtensa-linux-tdep.c (_initialize_xtensa_linux_tdep): Add declaration.
	* xtensa-tdep.c (_initialize_xtensa_tdep): Add declaration.

Change-Id: I13eec7e0ed2b3c427377a7bdb055cf46da64def9
2020-01-13 14:01:38 -05:00

662 lines
18 KiB
C
Raw Blame History

/* Darwin support for GDB, the GNU debugger.
Copyright (C) 1997-2020 Free Software Foundation, Inc.
Contributed by Apple Computer, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "frame.h"
#include "inferior.h"
#include "target.h"
#include "symfile.h"
#include "symtab.h"
#include "objfiles.h"
#include "gdbcmd.h"
#include "regcache.h"
#include "i386-tdep.h"
#include "i387-tdep.h"
#include "gdbarch.h"
#include "arch-utils.h"
#include "gdbcore.h"
#include "x86-nat.h"
#include "darwin-nat.h"
#include "i386-darwin-tdep.h"
#ifdef BFD64
#include "amd64-nat.h"
#include "amd64-tdep.h"
#include "amd64-darwin-tdep.h"
#endif
struct i386_darwin_nat_target final : public x86_nat_target<darwin_nat_target>
{
/* Add our register access methods. */
void fetch_registers (struct regcache *, int) override;
void store_registers (struct regcache *, int) override;
};
static struct i386_darwin_nat_target darwin_target;
/* Read register values from the inferior process.
If REGNO is -1, do this for all registers.
Otherwise, REGNO specifies which register (so we can save time). */
void
i386_darwin_nat_target::fetch_registers (struct regcache *regcache, int regno)
{
thread_t current_thread = regcache->ptid ().tid ();
int fetched = 0;
struct gdbarch *gdbarch = regcache->arch ();
#ifdef BFD64
if (gdbarch_ptr_bit (gdbarch) == 64)
{
if (regno == -1 || amd64_native_gregset_supplies_p (gdbarch, regno))
{
x86_thread_state_t gp_regs;
unsigned int gp_count = x86_THREAD_STATE_COUNT;
kern_return_t ret;
ret = thread_get_state
(current_thread, x86_THREAD_STATE, (thread_state_t) & gp_regs,
&gp_count);
if (ret != KERN_SUCCESS)
{
printf_unfiltered (_("Error calling thread_get_state for "
"GP registers for thread 0x%lx\n"),
(unsigned long) current_thread);
MACH_CHECK_ERROR (ret);
}
/* Some kernels don't sanitize the values. */
gp_regs.uts.ts64.__fs &= 0xffff;
gp_regs.uts.ts64.__gs &= 0xffff;
amd64_supply_native_gregset (regcache, &gp_regs.uts, -1);
fetched++;
}
if (regno == -1 || !amd64_native_gregset_supplies_p (gdbarch, regno))
{
x86_float_state_t fp_regs;
unsigned int fp_count = x86_FLOAT_STATE_COUNT;
kern_return_t ret;
ret = thread_get_state
(current_thread, x86_FLOAT_STATE, (thread_state_t) & fp_regs,
&fp_count);
if (ret != KERN_SUCCESS)
{
printf_unfiltered (_("Error calling thread_get_state for "
"float registers for thread 0x%lx\n"),
(unsigned long) current_thread);
MACH_CHECK_ERROR (ret);
}
amd64_supply_fxsave (regcache, -1, &fp_regs.ufs.fs64.__fpu_fcw);
fetched++;
}
}
else
#endif
{
if (regno == -1 || regno < I386_NUM_GREGS)
{
x86_thread_state32_t gp_regs;
unsigned int gp_count = x86_THREAD_STATE32_COUNT;
kern_return_t ret;
int i;
ret = thread_get_state
(current_thread, x86_THREAD_STATE32, (thread_state_t) &gp_regs,
&gp_count);
if (ret != KERN_SUCCESS)
{
printf_unfiltered (_("Error calling thread_get_state for "
"GP registers for thread 0x%lx\n"),
(unsigned long) current_thread);
MACH_CHECK_ERROR (ret);
}
for (i = 0; i < I386_NUM_GREGS; i++)
regcache->raw_supply
(i, (char *) &gp_regs + i386_darwin_thread_state_reg_offset[i]);
fetched++;
}
if (regno == -1
|| (regno >= I386_ST0_REGNUM && regno < I386_SSE_NUM_REGS))
{
x86_float_state32_t fp_regs;
unsigned int fp_count = x86_FLOAT_STATE32_COUNT;
kern_return_t ret;
ret = thread_get_state
(current_thread, x86_FLOAT_STATE32, (thread_state_t) &fp_regs,
&fp_count);
if (ret != KERN_SUCCESS)
{
printf_unfiltered (_("Error calling thread_get_state for "
"float registers for thread 0x%lx\n"),
(unsigned long) current_thread);
MACH_CHECK_ERROR (ret);
}
i387_supply_fxsave (regcache, -1, &fp_regs.__fpu_fcw);
fetched++;
}
}
if (! fetched)
{
warning (_("unknown register %d"), regno);
regcache->raw_supply (regno, NULL);
}
}
/* Store our register values back into the inferior.
If REGNO is -1, do this for all registers.
Otherwise, REGNO specifies which register (so we can save time). */
void
i386_darwin_nat_target::store_registers (struct regcache *regcache,
int regno)
{
thread_t current_thread = regcache->ptid ().tid ();
struct gdbarch *gdbarch = regcache->arch ();
#ifdef BFD64
if (gdbarch_ptr_bit (gdbarch) == 64)
{
if (regno == -1 || amd64_native_gregset_supplies_p (gdbarch, regno))
{
x86_thread_state_t gp_regs;
kern_return_t ret;
unsigned int gp_count = x86_THREAD_STATE_COUNT;
ret = thread_get_state
(current_thread, x86_THREAD_STATE, (thread_state_t) &gp_regs,
&gp_count);
MACH_CHECK_ERROR (ret);
gdb_assert (gp_regs.tsh.flavor == x86_THREAD_STATE64);
gdb_assert (gp_regs.tsh.count == x86_THREAD_STATE64_COUNT);
amd64_collect_native_gregset (regcache, &gp_regs.uts, regno);
/* Some kernels don't sanitize the values. */
gp_regs.uts.ts64.__fs &= 0xffff;
gp_regs.uts.ts64.__gs &= 0xffff;
ret = thread_set_state (current_thread, x86_THREAD_STATE,
(thread_state_t) &gp_regs,
x86_THREAD_STATE_COUNT);
MACH_CHECK_ERROR (ret);
}
if (regno == -1 || !amd64_native_gregset_supplies_p (gdbarch, regno))
{
x86_float_state_t fp_regs;
kern_return_t ret;
unsigned int fp_count = x86_FLOAT_STATE_COUNT;
ret = thread_get_state
(current_thread, x86_FLOAT_STATE, (thread_state_t) & fp_regs,
&fp_count);
MACH_CHECK_ERROR (ret);
gdb_assert (fp_regs.fsh.flavor == x86_FLOAT_STATE64);
gdb_assert (fp_regs.fsh.count == x86_FLOAT_STATE64_COUNT);
amd64_collect_fxsave (regcache, regno, &fp_regs.ufs.fs64.__fpu_fcw);
ret = thread_set_state (current_thread, x86_FLOAT_STATE,
(thread_state_t) & fp_regs,
x86_FLOAT_STATE_COUNT);
MACH_CHECK_ERROR (ret);
}
}
else
#endif
{
if (regno == -1 || regno < I386_NUM_GREGS)
{
x86_thread_state32_t gp_regs;
kern_return_t ret;
unsigned int gp_count = x86_THREAD_STATE32_COUNT;
int i;
ret = thread_get_state
(current_thread, x86_THREAD_STATE32, (thread_state_t) &gp_regs,
&gp_count);
MACH_CHECK_ERROR (ret);
for (i = 0; i < I386_NUM_GREGS; i++)
if (regno == -1 || regno == i)
regcache->raw_collect
(i, (char *) &gp_regs + i386_darwin_thread_state_reg_offset[i]);
ret = thread_set_state (current_thread, x86_THREAD_STATE32,
(thread_state_t) &gp_regs,
x86_THREAD_STATE32_COUNT);
MACH_CHECK_ERROR (ret);
}
if (regno == -1
|| (regno >= I386_ST0_REGNUM && regno < I386_SSE_NUM_REGS))
{
x86_float_state32_t fp_regs;
unsigned int fp_count = x86_FLOAT_STATE32_COUNT;
kern_return_t ret;
ret = thread_get_state
(current_thread, x86_FLOAT_STATE32, (thread_state_t) & fp_regs,
&fp_count);
MACH_CHECK_ERROR (ret);
i387_collect_fxsave (regcache, regno, &fp_regs.__fpu_fcw);
ret = thread_set_state (current_thread, x86_FLOAT_STATE32,
(thread_state_t) &fp_regs,
x86_FLOAT_STATE32_COUNT);
MACH_CHECK_ERROR (ret);
}
}
}
/* Support for debug registers, boosted mostly from i386-linux-nat.c. */
static void
i386_darwin_dr_set (int regnum, CORE_ADDR value)
{
thread_t current_thread;
x86_debug_state_t dr_regs;
kern_return_t ret;
unsigned int dr_count;
gdb_assert (regnum >= 0 && regnum <= DR_CONTROL);
current_thread = inferior_ptid.tid ();
dr_regs.dsh.flavor = x86_DEBUG_STATE;
dr_regs.dsh.count = x86_DEBUG_STATE_COUNT;
dr_count = x86_DEBUG_STATE_COUNT;
ret = thread_get_state (current_thread, x86_DEBUG_STATE,
(thread_state_t) &dr_regs, &dr_count);
MACH_CHECK_ERROR (ret);
switch (dr_regs.dsh.flavor)
{
case x86_DEBUG_STATE32:
switch (regnum)
{
case 0:
dr_regs.uds.ds32.__dr0 = value;
break;
case 1:
dr_regs.uds.ds32.__dr1 = value;
break;
case 2:
dr_regs.uds.ds32.__dr2 = value;
break;
case 3:
dr_regs.uds.ds32.__dr3 = value;
break;
case 4:
dr_regs.uds.ds32.__dr4 = value;
break;
case 5:
dr_regs.uds.ds32.__dr5 = value;
break;
case 6:
dr_regs.uds.ds32.__dr6 = value;
break;
case 7:
dr_regs.uds.ds32.__dr7 = value;
break;
}
break;
#ifdef BFD64
case x86_DEBUG_STATE64:
switch (regnum)
{
case 0:
dr_regs.uds.ds64.__dr0 = value;
break;
case 1:
dr_regs.uds.ds64.__dr1 = value;
break;
case 2:
dr_regs.uds.ds64.__dr2 = value;
break;
case 3:
dr_regs.uds.ds64.__dr3 = value;
break;
case 4:
dr_regs.uds.ds64.__dr4 = value;
break;
case 5:
dr_regs.uds.ds64.__dr5 = value;
break;
case 6:
dr_regs.uds.ds64.__dr6 = value;
break;
case 7:
dr_regs.uds.ds64.__dr7 = value;
break;
}
break;
#endif
}
ret = thread_set_state (current_thread, dr_regs.dsh.flavor,
(thread_state_t) &dr_regs.uds, dr_count);
MACH_CHECK_ERROR (ret);
}
static CORE_ADDR
i386_darwin_dr_get (int regnum)
{
thread_t current_thread;
x86_debug_state_t dr_regs;
kern_return_t ret;
unsigned int dr_count;
gdb_assert (regnum >= 0 && regnum <= DR_CONTROL);
current_thread = inferior_ptid.tid ();
dr_regs.dsh.flavor = x86_DEBUG_STATE;
dr_regs.dsh.count = x86_DEBUG_STATE_COUNT;
dr_count = x86_DEBUG_STATE_COUNT;
ret = thread_get_state (current_thread, x86_DEBUG_STATE,
(thread_state_t) &dr_regs, &dr_count);
MACH_CHECK_ERROR (ret);
switch (dr_regs.dsh.flavor)
{
case x86_DEBUG_STATE32:
switch (regnum)
{
case 0:
return dr_regs.uds.ds32.__dr0;
case 1:
return dr_regs.uds.ds32.__dr1;
case 2:
return dr_regs.uds.ds32.__dr2;
case 3:
return dr_regs.uds.ds32.__dr3;
case 4:
return dr_regs.uds.ds32.__dr4;
case 5:
return dr_regs.uds.ds32.__dr5;
case 6:
return dr_regs.uds.ds32.__dr6;
case 7:
return dr_regs.uds.ds32.__dr7;
default:
return -1;
}
break;
#ifdef BFD64
case x86_DEBUG_STATE64:
switch (regnum)
{
case 0:
return dr_regs.uds.ds64.__dr0;
case 1:
return dr_regs.uds.ds64.__dr1;
case 2:
return dr_regs.uds.ds64.__dr2;
case 3:
return dr_regs.uds.ds64.__dr3;
case 4:
return dr_regs.uds.ds64.__dr4;
case 5:
return dr_regs.uds.ds64.__dr5;
case 6:
return dr_regs.uds.ds64.__dr6;
case 7:
return dr_regs.uds.ds64.__dr7;
default:
return -1;
}
break;
#endif
default:
return -1;
}
}
static void
i386_darwin_dr_set_control (unsigned long control)
{
i386_darwin_dr_set (DR_CONTROL, control);
}
static void
i386_darwin_dr_set_addr (int regnum, CORE_ADDR addr)
{
gdb_assert (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR);
i386_darwin_dr_set (DR_FIRSTADDR + regnum, addr);
}
static CORE_ADDR
i386_darwin_dr_get_addr (int regnum)
{
return i386_darwin_dr_get (regnum);
}
static unsigned long
i386_darwin_dr_get_status (void)
{
return i386_darwin_dr_get (DR_STATUS);
}
static unsigned long
i386_darwin_dr_get_control (void)
{
return i386_darwin_dr_get (DR_CONTROL);
}
void
darwin_check_osabi (darwin_inferior *inf, thread_t thread)
{
if (gdbarch_osabi (target_gdbarch ()) == GDB_OSABI_UNKNOWN)
{
/* Attaching to a process. Let's figure out what kind it is. */
x86_thread_state_t gp_regs;
struct gdbarch_info info;
unsigned int gp_count = x86_THREAD_STATE_COUNT;
kern_return_t ret;
ret = thread_get_state (thread, x86_THREAD_STATE,
(thread_state_t) &gp_regs, &gp_count);
if (ret != KERN_SUCCESS)
{
MACH_CHECK_ERROR (ret);
return;
}
gdbarch_info_init (&info);
gdbarch_info_fill (&info);
info.byte_order = gdbarch_byte_order (target_gdbarch ());
info.osabi = GDB_OSABI_DARWIN;
if (gp_regs.tsh.flavor == x86_THREAD_STATE64)
info.bfd_arch_info = bfd_lookup_arch (bfd_arch_i386,
bfd_mach_x86_64);
else
info.bfd_arch_info = bfd_lookup_arch (bfd_arch_i386,
bfd_mach_i386_i386);
gdbarch_update_p (info);
}
}
#define X86_EFLAGS_T 0x100UL
/* Returning from a signal trampoline is done by calling a
special system call (sigreturn). This system call
restores the registers that were saved when the signal was
raised, including %eflags/%rflags. That means that single-stepping
won't work. Instead, we'll have to modify the signal context
that's about to be restored, and set the trace flag there. */
static int
i386_darwin_sstep_at_sigreturn (x86_thread_state_t *regs)
{
enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
static const gdb_byte darwin_syscall[] = { 0xcd, 0x80 }; /* int 0x80 */
gdb_byte buf[sizeof (darwin_syscall)];
/* Check if PC is at a sigreturn system call. */
if (target_read_memory (regs->uts.ts32.__eip, buf, sizeof (buf)) == 0
&& memcmp (buf, darwin_syscall, sizeof (darwin_syscall)) == 0
&& regs->uts.ts32.__eax == 0xb8 /* SYS_sigreturn */)
{
ULONGEST uctx_addr;
ULONGEST mctx_addr;
ULONGEST flags_addr;
unsigned int eflags;
uctx_addr = read_memory_unsigned_integer
(regs->uts.ts32.__esp + 4, 4, byte_order);
mctx_addr = read_memory_unsigned_integer
(uctx_addr + 28, 4, byte_order);
flags_addr = mctx_addr + 12 + 9 * 4;
read_memory (flags_addr, (gdb_byte *) &eflags, 4);
eflags |= X86_EFLAGS_T;
write_memory (flags_addr, (gdb_byte *) &eflags, 4);
return 1;
}
return 0;
}
#ifdef BFD64
static int
amd64_darwin_sstep_at_sigreturn (x86_thread_state_t *regs)
{
enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
static const gdb_byte darwin_syscall[] = { 0x0f, 0x05 }; /* syscall */
gdb_byte buf[sizeof (darwin_syscall)];
/* Check if PC is at a sigreturn system call. */
if (target_read_memory (regs->uts.ts64.__rip, buf, sizeof (buf)) == 0
&& memcmp (buf, darwin_syscall, sizeof (darwin_syscall)) == 0
&& (regs->uts.ts64.__rax & 0xffffffff) == 0x20000b8 /* SYS_sigreturn */)
{
ULONGEST mctx_addr;
ULONGEST flags_addr;
unsigned int rflags;
mctx_addr = read_memory_unsigned_integer
(regs->uts.ts64.__rdi + 48, 8, byte_order);
flags_addr = mctx_addr + 16 + 17 * 8;
/* AMD64 is little endian. */
read_memory (flags_addr, (gdb_byte *) &rflags, 4);
rflags |= X86_EFLAGS_T;
write_memory (flags_addr, (gdb_byte *) &rflags, 4);
return 1;
}
return 0;
}
#endif
void
darwin_set_sstep (thread_t thread, int enable)
{
x86_thread_state_t regs;
unsigned int count = x86_THREAD_STATE_COUNT;
kern_return_t kret;
kret = thread_get_state (thread, x86_THREAD_STATE,
(thread_state_t) &regs, &count);
if (kret != KERN_SUCCESS)
{
printf_unfiltered (_("darwin_set_sstep: error %x, thread=%x\n"),
kret, thread);
return;
}
switch (regs.tsh.flavor)
{
case x86_THREAD_STATE32:
{
__uint32_t bit = enable ? X86_EFLAGS_T : 0;
if (enable && i386_darwin_sstep_at_sigreturn (&regs))
return;
if ((regs.uts.ts32.__eflags & X86_EFLAGS_T) == bit)
return;
regs.uts.ts32.__eflags
= (regs.uts.ts32.__eflags & ~X86_EFLAGS_T) | bit;
kret = thread_set_state (thread, x86_THREAD_STATE,
(thread_state_t) &regs, count);
MACH_CHECK_ERROR (kret);
}
break;
#ifdef BFD64
case x86_THREAD_STATE64:
{
__uint64_t bit = enable ? X86_EFLAGS_T : 0;
if (enable && amd64_darwin_sstep_at_sigreturn (&regs))
return;
if ((regs.uts.ts64.__rflags & X86_EFLAGS_T) == bit)
return;
regs.uts.ts64.__rflags
= (regs.uts.ts64.__rflags & ~X86_EFLAGS_T) | bit;
kret = thread_set_state (thread, x86_THREAD_STATE,
(thread_state_t) &regs, count);
MACH_CHECK_ERROR (kret);
}
break;
#endif
default:
error (_("darwin_set_sstep: unknown flavour: %d"), regs.tsh.flavor);
}
}
void _initialize_i386_darwin_nat ();
void
_initialize_i386_darwin_nat ()
{
#ifdef BFD64
amd64_native_gregset64_reg_offset = amd64_darwin_thread_state_reg_offset;
amd64_native_gregset64_num_regs = amd64_darwin_thread_state_num_regs;
amd64_native_gregset32_reg_offset = i386_darwin_thread_state_reg_offset;
amd64_native_gregset32_num_regs = i386_darwin_thread_state_num_regs;
#endif
x86_dr_low.set_control = i386_darwin_dr_set_control;
x86_dr_low.set_addr = i386_darwin_dr_set_addr;
x86_dr_low.get_addr = i386_darwin_dr_get_addr;
x86_dr_low.get_status = i386_darwin_dr_get_status;
x86_dr_low.get_control = i386_darwin_dr_get_control;
/* Let's assume that the kernel is 64 bits iff the executable is. */
#ifdef __x86_64__
x86_set_debug_register_length (8);
#else
x86_set_debug_register_length (4);
#endif
add_inf_child_target (&darwin_target);
}
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