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6c2659886f
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
2167 lines
60 KiB
C
2167 lines
60 KiB
C
/* Native debugging support for Intel x86 running DJGPP.
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Copyright (C) 1997-2020 Free Software Foundation, Inc.
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Written by Robert Hoehne.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* To whomever it may concern, here's a general description of how
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debugging in DJGPP works, and the special quirks GDB does to
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support that.
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When the DJGPP port of GDB is debugging a DJGPP program natively,
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there aren't 2 separate processes, the debuggee and GDB itself, as
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on other systems. (This is DOS, where there can only be one active
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process at any given time, remember?) Instead, GDB and the
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debuggee live in the same process. So when GDB calls
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go32_create_inferior below, and that function calls edi_init from
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the DJGPP debug support library libdbg.a, we load the debuggee's
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executable file into GDB's address space, set it up for execution
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as the stub loader (a short real-mode program prepended to each
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DJGPP executable) normally would, and do a lot of preparations for
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swapping between GDB's and debuggee's internal state, primarily wrt
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the exception handlers. This swapping happens every time we resume
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the debuggee or switch back to GDB's code, and it includes:
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. swapping all the segment registers
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. swapping the PSP (the Program Segment Prefix)
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. swapping the signal handlers
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. swapping the exception handlers
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. swapping the FPU status
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. swapping the 3 standard file handles (more about this below)
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Then running the debuggee simply means longjmp into it where its PC
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is and let it run until it stops for some reason. When it stops,
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GDB catches the exception that stopped it and longjmp's back into
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its own code. All the possible exit points of the debuggee are
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watched; for example, the normal exit point is recognized because a
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DOS program issues a special system call to exit. If one of those
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exit points is hit, we mourn the inferior and clean up after it.
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Cleaning up is very important, even if the process exits normally,
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because otherwise we might leave behind traces of previous
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execution, and in several cases GDB itself might be left hosed,
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because all the exception handlers were not restored.
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Swapping of the standard handles (in redir_to_child and
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redir_to_debugger) is needed because, since both GDB and the
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debuggee live in the same process, as far as the OS is concerned,
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the share the same file table. This means that the standard
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handles 0, 1, and 2 point to the same file table entries, and thus
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are connected to the same devices. Therefore, if the debugger
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redirects its standard output, the standard output of the debuggee
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is also automagically redirected to the same file/device!
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Similarly, if the debuggee redirects its stdout to a file, you
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won't be able to see debugger's output (it will go to the same file
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where the debuggee has its output); and if the debuggee closes its
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standard input, you will lose the ability to talk to debugger!
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For this reason, every time the debuggee is about to be resumed, we
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call redir_to_child, which redirects the standard handles to where
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the debuggee expects them to be. When the debuggee stops and GDB
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regains control, we call redir_to_debugger, which redirects those 3
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handles back to where GDB expects.
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Note that only the first 3 handles are swapped, so if the debuggee
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redirects or closes any other handles, GDB will not notice. In
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particular, the exit code of a DJGPP program forcibly closes all
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file handles beyond the first 3 ones, so when the debuggee exits,
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GDB currently loses its stdaux and stdprn streams. Fortunately,
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GDB does not use those as of this writing, and will never need
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to. */
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#include "defs.h"
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#include <fcntl.h>
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#include "x86-nat.h"
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#include "inferior.h"
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#include "infrun.h"
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#include "gdbthread.h"
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#include "gdbsupport/gdb_wait.h"
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#include "gdbcore.h"
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#include "command.h"
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#include "gdbcmd.h"
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#include "floatformat.h"
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#include "buildsym-legacy.h"
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#include "i387-tdep.h"
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#include "i386-tdep.h"
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#include "nat/x86-cpuid.h"
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#include "value.h"
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#include "regcache.h"
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#include "top.h"
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#include "cli/cli-utils.h"
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#include "inf-child.h"
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#include <ctype.h>
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#include <unistd.h>
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#include <sys/utsname.h>
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#include <io.h>
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#include <dos.h>
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#include <dpmi.h>
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#include <go32.h>
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#include <sys/farptr.h>
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#include <debug/v2load.h>
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#include <debug/dbgcom.h>
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#if __DJGPP_MINOR__ > 2
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#include <debug/redir.h>
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#endif
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#include <langinfo.h>
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#if __DJGPP_MINOR__ < 3
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/* This code will be provided from DJGPP 2.03 on. Until then I code it
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here. */
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typedef struct
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{
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unsigned short sig0;
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unsigned short sig1;
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unsigned short sig2;
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unsigned short sig3;
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unsigned short exponent:15;
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unsigned short sign:1;
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}
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NPXREG;
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typedef struct
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{
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unsigned int control;
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unsigned int status;
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unsigned int tag;
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unsigned int eip;
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unsigned int cs;
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unsigned int dataptr;
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unsigned int datasel;
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NPXREG reg[8];
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}
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NPX;
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static NPX npx;
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static void save_npx (void); /* Save the FPU of the debugged program. */
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static void load_npx (void); /* Restore the FPU of the debugged program. */
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/* ------------------------------------------------------------------------- */
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/* Store the contents of the NPX in the global variable `npx'. */
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/* *INDENT-OFF* */
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static void
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save_npx (void)
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{
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asm ("inb $0xa0, %%al \n\
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testb $0x20, %%al \n\
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jz 1f \n\
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xorb %%al, %%al \n\
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outb %%al, $0xf0 \n\
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movb $0x20, %%al \n\
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outb %%al, $0xa0 \n\
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outb %%al, $0x20 \n\
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1: \n\
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fnsave %0 \n\
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fwait "
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: "=m" (npx)
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: /* No input */
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: "%eax");
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}
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/* *INDENT-ON* */
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/* ------------------------------------------------------------------------- */
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/* Reload the contents of the NPX from the global variable `npx'. */
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static void
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load_npx (void)
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{
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asm ("frstor %0":"=m" (npx));
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}
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/* ------------------------------------------------------------------------- */
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/* Stubs for the missing redirection functions. */
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typedef struct {
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char *command;
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int redirected;
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} cmdline_t;
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void
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redir_cmdline_delete (cmdline_t *ptr)
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{
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ptr->redirected = 0;
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}
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int
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redir_cmdline_parse (const char *args, cmdline_t *ptr)
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{
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return -1;
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}
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int
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redir_to_child (cmdline_t *ptr)
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{
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return 1;
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}
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int
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redir_to_debugger (cmdline_t *ptr)
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{
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return 1;
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}
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int
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redir_debug_init (cmdline_t *ptr)
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{
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return 0;
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}
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#endif /* __DJGPP_MINOR < 3 */
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typedef enum { wp_insert, wp_remove, wp_count } wp_op;
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/* This holds the current reference counts for each debug register. */
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static int dr_ref_count[4];
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#define SOME_PID 42
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static int prog_has_started = 0;
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#define r_ofs(x) (offsetof(TSS,x))
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static struct
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{
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size_t tss_ofs;
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size_t size;
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}
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regno_mapping[] =
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{
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{r_ofs (tss_eax), 4}, /* normal registers, from a_tss */
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{r_ofs (tss_ecx), 4},
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{r_ofs (tss_edx), 4},
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{r_ofs (tss_ebx), 4},
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{r_ofs (tss_esp), 4},
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{r_ofs (tss_ebp), 4},
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{r_ofs (tss_esi), 4},
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{r_ofs (tss_edi), 4},
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{r_ofs (tss_eip), 4},
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{r_ofs (tss_eflags), 4},
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{r_ofs (tss_cs), 2},
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{r_ofs (tss_ss), 2},
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{r_ofs (tss_ds), 2},
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{r_ofs (tss_es), 2},
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{r_ofs (tss_fs), 2},
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{r_ofs (tss_gs), 2},
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{0, 10}, /* 8 FP registers, from npx.reg[] */
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{1, 10},
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{2, 10},
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{3, 10},
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{4, 10},
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{5, 10},
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{6, 10},
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{7, 10},
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/* The order of the next 7 registers must be consistent
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with their numbering in config/i386/tm-i386.h, which see. */
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{0, 2}, /* control word, from npx */
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{4, 2}, /* status word, from npx */
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{8, 2}, /* tag word, from npx */
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{16, 2}, /* last FP exception CS from npx */
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{12, 4}, /* last FP exception EIP from npx */
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{24, 2}, /* last FP exception operand selector from npx */
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{20, 4}, /* last FP exception operand offset from npx */
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{18, 2} /* last FP opcode from npx */
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};
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static struct
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{
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int go32_sig;
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enum gdb_signal gdb_sig;
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}
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sig_map[] =
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{
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{0, GDB_SIGNAL_FPE},
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{1, GDB_SIGNAL_TRAP},
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/* Exception 2 is triggered by the NMI. DJGPP handles it as SIGILL,
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but I think SIGBUS is better, since the NMI is usually activated
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as a result of a memory parity check failure. */
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{2, GDB_SIGNAL_BUS},
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{3, GDB_SIGNAL_TRAP},
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{4, GDB_SIGNAL_FPE},
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{5, GDB_SIGNAL_SEGV},
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{6, GDB_SIGNAL_ILL},
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{7, GDB_SIGNAL_EMT}, /* no-coprocessor exception */
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{8, GDB_SIGNAL_SEGV},
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{9, GDB_SIGNAL_SEGV},
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{10, GDB_SIGNAL_BUS},
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{11, GDB_SIGNAL_SEGV},
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{12, GDB_SIGNAL_SEGV},
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{13, GDB_SIGNAL_SEGV},
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{14, GDB_SIGNAL_SEGV},
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{16, GDB_SIGNAL_FPE},
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{17, GDB_SIGNAL_BUS},
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{31, GDB_SIGNAL_ILL},
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{0x1b, GDB_SIGNAL_INT},
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{0x75, GDB_SIGNAL_FPE},
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{0x78, GDB_SIGNAL_ALRM},
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{0x79, GDB_SIGNAL_INT},
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{0x7a, GDB_SIGNAL_QUIT},
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{-1, GDB_SIGNAL_LAST}
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};
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static struct {
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enum gdb_signal gdb_sig;
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int djgpp_excepno;
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} excepn_map[] = {
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{GDB_SIGNAL_0, -1},
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{GDB_SIGNAL_ILL, 6}, /* Invalid Opcode */
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{GDB_SIGNAL_EMT, 7}, /* triggers SIGNOFP */
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{GDB_SIGNAL_SEGV, 13}, /* GPF */
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{GDB_SIGNAL_BUS, 17}, /* Alignment Check */
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/* The rest are fake exceptions, see dpmiexcp.c in djlsr*.zip for
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details. */
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{GDB_SIGNAL_TERM, 0x1b}, /* triggers Ctrl-Break type of SIGINT */
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{GDB_SIGNAL_FPE, 0x75},
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{GDB_SIGNAL_INT, 0x79},
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{GDB_SIGNAL_QUIT, 0x7a},
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{GDB_SIGNAL_ALRM, 0x78}, /* triggers SIGTIMR */
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{GDB_SIGNAL_PROF, 0x78},
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{GDB_SIGNAL_LAST, -1}
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};
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|
|
/* The go32 target. */
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struct go32_nat_target final : public x86_nat_target<inf_child_target>
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{
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void attach (const char *, int) override;
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void resume (ptid_t, int, enum gdb_signal) override;
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ptid_t wait (ptid_t, struct target_waitstatus *, int) override;
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void fetch_registers (struct regcache *, int) override;
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void store_registers (struct regcache *, int) override;
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enum target_xfer_status xfer_partial (enum target_object object,
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const char *annex,
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gdb_byte *readbuf,
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const gdb_byte *writebuf,
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ULONGEST offset, ULONGEST len,
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ULONGEST *xfered_len) override;
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void files_info () override;
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void terminal_init () override;
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void terminal_inferior () override;
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void terminal_ours_for_output () override;
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void terminal_ours () override;
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void terminal_info (const char *, int) override;
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void pass_ctrlc () override;
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void kill () override;
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void create_inferior (const char *, const std::string &,
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char **, int) override;
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void mourn_inferior () override;
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bool thread_alive (ptid_t ptid) override;
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std::string pid_to_str (ptid_t) override;
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};
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static go32_nat_target the_go32_nat_target;
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void
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go32_nat_target::attach (const char *args, int from_tty)
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{
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error (_("\
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You cannot attach to a running program on this platform.\n\
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Use the `run' command to run DJGPP programs."));
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}
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static int resume_is_step;
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static int resume_signal = -1;
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void
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go32_nat_target::resume (ptid_t ptid, int step, enum gdb_signal siggnal)
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|
{
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int i;
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resume_is_step = step;
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if (siggnal != GDB_SIGNAL_0 && siggnal != GDB_SIGNAL_TRAP)
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{
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for (i = 0, resume_signal = -1;
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excepn_map[i].gdb_sig != GDB_SIGNAL_LAST; i++)
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if (excepn_map[i].gdb_sig == siggnal)
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{
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resume_signal = excepn_map[i].djgpp_excepno;
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break;
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}
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|
if (resume_signal == -1)
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printf_unfiltered ("Cannot deliver signal %s on this platform.\n",
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gdb_signal_to_name (siggnal));
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}
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|
}
|
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|
|
static char child_cwd[FILENAME_MAX];
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|
|
ptid_t
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go32_nat_target::wait (ptid_t ptid, struct target_waitstatus *status,
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|
int options)
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|
{
|
|
int i;
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|
unsigned char saved_opcode;
|
|
unsigned long INT3_addr = 0;
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|
int stepping_over_INT = 0;
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|
|
a_tss.tss_eflags &= 0xfeff; /* Reset the single-step flag (TF). */
|
|
if (resume_is_step)
|
|
{
|
|
/* If the next instruction is INT xx or INTO, we need to handle
|
|
them specially. Intel manuals say that these instructions
|
|
reset the single-step flag (a.k.a. TF). However, it seems
|
|
that, at least in the DPMI environment, and at least when
|
|
stepping over the DPMI interrupt 31h, the problem is having
|
|
TF set at all when INT 31h is executed: the debuggee either
|
|
crashes (and takes the system with it) or is killed by a
|
|
SIGTRAP.
|
|
|
|
So we need to emulate single-step mode: we put an INT3 opcode
|
|
right after the INT xx instruction, let the debuggee run
|
|
until it hits INT3 and stops, then restore the original
|
|
instruction which we overwrote with the INT3 opcode, and back
|
|
up the debuggee's EIP to that instruction. */
|
|
read_child (a_tss.tss_eip, &saved_opcode, 1);
|
|
if (saved_opcode == 0xCD || saved_opcode == 0xCE)
|
|
{
|
|
unsigned char INT3_opcode = 0xCC;
|
|
|
|
INT3_addr
|
|
= saved_opcode == 0xCD ? a_tss.tss_eip + 2 : a_tss.tss_eip + 1;
|
|
stepping_over_INT = 1;
|
|
read_child (INT3_addr, &saved_opcode, 1);
|
|
write_child (INT3_addr, &INT3_opcode, 1);
|
|
}
|
|
else
|
|
a_tss.tss_eflags |= 0x0100; /* normal instruction: set TF */
|
|
}
|
|
|
|
/* The special value FFFFh in tss_trap indicates to run_child that
|
|
tss_irqn holds a signal to be delivered to the debuggee. */
|
|
if (resume_signal <= -1)
|
|
{
|
|
a_tss.tss_trap = 0;
|
|
a_tss.tss_irqn = 0xff;
|
|
}
|
|
else
|
|
{
|
|
a_tss.tss_trap = 0xffff; /* run_child looks for this. */
|
|
a_tss.tss_irqn = resume_signal;
|
|
}
|
|
|
|
/* The child might change working directory behind our back. The
|
|
GDB users won't like the side effects of that when they work with
|
|
relative file names, and GDB might be confused by its current
|
|
directory not being in sync with the truth. So we always make a
|
|
point of changing back to where GDB thinks is its cwd, when we
|
|
return control to the debugger, but restore child's cwd before we
|
|
run it. */
|
|
/* Initialize child_cwd, before the first call to run_child and not
|
|
in the initialization, so the child get also the changed directory
|
|
set with the gdb-command "cd ..." */
|
|
if (!*child_cwd)
|
|
/* Initialize child's cwd with the current one. */
|
|
getcwd (child_cwd, sizeof (child_cwd));
|
|
|
|
chdir (child_cwd);
|
|
|
|
#if __DJGPP_MINOR__ < 3
|
|
load_npx ();
|
|
#endif
|
|
run_child ();
|
|
#if __DJGPP_MINOR__ < 3
|
|
save_npx ();
|
|
#endif
|
|
|
|
/* Did we step over an INT xx instruction? */
|
|
if (stepping_over_INT && a_tss.tss_eip == INT3_addr + 1)
|
|
{
|
|
/* Restore the original opcode. */
|
|
a_tss.tss_eip--; /* EIP points *after* the INT3 instruction. */
|
|
write_child (a_tss.tss_eip, &saved_opcode, 1);
|
|
/* Simulate a TRAP exception. */
|
|
a_tss.tss_irqn = 1;
|
|
a_tss.tss_eflags |= 0x0100;
|
|
}
|
|
|
|
getcwd (child_cwd, sizeof (child_cwd)); /* in case it has changed */
|
|
if (current_directory != NULL)
|
|
chdir (current_directory);
|
|
|
|
if (a_tss.tss_irqn == 0x21)
|
|
{
|
|
status->kind = TARGET_WAITKIND_EXITED;
|
|
status->value.integer = a_tss.tss_eax & 0xff;
|
|
}
|
|
else
|
|
{
|
|
status->value.sig = GDB_SIGNAL_UNKNOWN;
|
|
status->kind = TARGET_WAITKIND_STOPPED;
|
|
for (i = 0; sig_map[i].go32_sig != -1; i++)
|
|
{
|
|
if (a_tss.tss_irqn == sig_map[i].go32_sig)
|
|
{
|
|
#if __DJGPP_MINOR__ < 3
|
|
if ((status->value.sig = sig_map[i].gdb_sig) !=
|
|
GDB_SIGNAL_TRAP)
|
|
status->kind = TARGET_WAITKIND_SIGNALLED;
|
|
#else
|
|
status->value.sig = sig_map[i].gdb_sig;
|
|
#endif
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return ptid_t (SOME_PID);
|
|
}
|
|
|
|
static void
|
|
fetch_register (struct regcache *regcache, int regno)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
if (regno < gdbarch_fp0_regnum (gdbarch))
|
|
regcache->raw_supply (regno,
|
|
(char *) &a_tss + regno_mapping[regno].tss_ofs);
|
|
else if (i386_fp_regnum_p (gdbarch, regno) || i386_fpc_regnum_p (gdbarch,
|
|
regno))
|
|
i387_supply_fsave (regcache, regno, &npx);
|
|
else
|
|
internal_error (__FILE__, __LINE__,
|
|
_("Invalid register no. %d in fetch_register."), regno);
|
|
}
|
|
|
|
void
|
|
go32_nat_target::fetch_registers (struct regcache *regcache, int regno)
|
|
{
|
|
if (regno >= 0)
|
|
fetch_register (regcache, regno);
|
|
else
|
|
{
|
|
for (regno = 0;
|
|
regno < gdbarch_fp0_regnum (regcache->arch ());
|
|
regno++)
|
|
fetch_register (regcache, regno);
|
|
i387_supply_fsave (regcache, -1, &npx);
|
|
}
|
|
}
|
|
|
|
static void
|
|
store_register (const struct regcache *regcache, int regno)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
if (regno < gdbarch_fp0_regnum (gdbarch))
|
|
regcache->raw_collect (regno,
|
|
(char *) &a_tss + regno_mapping[regno].tss_ofs);
|
|
else if (i386_fp_regnum_p (gdbarch, regno) || i386_fpc_regnum_p (gdbarch,
|
|
regno))
|
|
i387_collect_fsave (regcache, regno, &npx);
|
|
else
|
|
internal_error (__FILE__, __LINE__,
|
|
_("Invalid register no. %d in store_register."), regno);
|
|
}
|
|
|
|
void
|
|
go32_nat_target::store_registers (struct regcache *regcache, int regno)
|
|
{
|
|
unsigned r;
|
|
|
|
if (regno >= 0)
|
|
store_register (regcache, regno);
|
|
else
|
|
{
|
|
for (r = 0; r < gdbarch_fp0_regnum (regcache->arch ()); r++)
|
|
store_register (regcache, r);
|
|
i387_collect_fsave (regcache, -1, &npx);
|
|
}
|
|
}
|
|
|
|
/* Const-correct version of DJGPP's write_child, which unfortunately
|
|
takes a non-const buffer pointer. */
|
|
|
|
static int
|
|
my_write_child (unsigned child_addr, const void *buf, unsigned len)
|
|
{
|
|
static void *buffer = NULL;
|
|
static unsigned buffer_len = 0;
|
|
int res;
|
|
|
|
if (buffer_len < len)
|
|
{
|
|
buffer = xrealloc (buffer, len);
|
|
buffer_len = len;
|
|
}
|
|
|
|
memcpy (buffer, buf, len);
|
|
res = write_child (child_addr, buffer, len);
|
|
return res;
|
|
}
|
|
|
|
/* Helper for go32_xfer_partial that handles memory transfers.
|
|
Arguments are like target_xfer_partial. */
|
|
|
|
static enum target_xfer_status
|
|
go32_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len)
|
|
{
|
|
int res;
|
|
|
|
if (writebuf != NULL)
|
|
res = my_write_child (memaddr, writebuf, len);
|
|
else
|
|
res = read_child (memaddr, readbuf, len);
|
|
|
|
/* read_child and write_child return zero on success, non-zero on
|
|
failure. */
|
|
if (res != 0)
|
|
return TARGET_XFER_E_IO;
|
|
|
|
*xfered_len = len;
|
|
return TARGET_XFER_OK;
|
|
}
|
|
|
|
/* Target to_xfer_partial implementation. */
|
|
|
|
enum target_xfer_status
|
|
go32_nat_target::xfer_partial (enum target_object object,
|
|
const char *annex, gdb_byte *readbuf,
|
|
const gdb_byte *writebuf, ULONGEST offset,
|
|
ULONGEST len,
|
|
ULONGEST *xfered_len)
|
|
{
|
|
switch (object)
|
|
{
|
|
case TARGET_OBJECT_MEMORY:
|
|
return go32_xfer_memory (readbuf, writebuf, offset, len, xfered_len);
|
|
|
|
default:
|
|
return this->beneath ()->xfer_partial (object, annex,
|
|
readbuf, writebuf, offset, len,
|
|
xfered_len);
|
|
}
|
|
}
|
|
|
|
static cmdline_t child_cmd; /* Parsed child's command line kept here. */
|
|
|
|
void
|
|
go32_nat_target::files_info ()
|
|
{
|
|
printf_unfiltered ("You are running a DJGPP V2 program.\n");
|
|
}
|
|
|
|
void
|
|
go32_nat_target::kill_inferior ()
|
|
{
|
|
mourn_inferior ();
|
|
}
|
|
|
|
void
|
|
go32_nat_target::create_inferior (const char *exec_file,
|
|
const std::string &allargs,
|
|
char **env, int from_tty)
|
|
{
|
|
extern char **environ;
|
|
jmp_buf start_state;
|
|
char *cmdline;
|
|
char **env_save = environ;
|
|
size_t cmdlen;
|
|
struct inferior *inf;
|
|
int result;
|
|
const char *args = allargs.c_str ();
|
|
|
|
/* If no exec file handed to us, get it from the exec-file command -- with
|
|
a good, common error message if none is specified. */
|
|
if (exec_file == 0)
|
|
exec_file = get_exec_file (1);
|
|
|
|
resume_signal = -1;
|
|
resume_is_step = 0;
|
|
|
|
/* Initialize child's cwd as empty to be initialized when starting
|
|
the child. */
|
|
*child_cwd = 0;
|
|
|
|
/* Init command line storage. */
|
|
if (redir_debug_init (&child_cmd) == -1)
|
|
internal_error (__FILE__, __LINE__,
|
|
_("Cannot allocate redirection storage: "
|
|
"not enough memory.\n"));
|
|
|
|
/* Parse the command line and create redirections. */
|
|
if (strpbrk (args, "<>"))
|
|
{
|
|
if (redir_cmdline_parse (args, &child_cmd) == 0)
|
|
args = child_cmd.command;
|
|
else
|
|
error (_("Syntax error in command line."));
|
|
}
|
|
else
|
|
child_cmd.command = xstrdup (args);
|
|
|
|
cmdlen = strlen (args);
|
|
/* v2loadimage passes command lines via DOS memory, so it cannot
|
|
possibly handle commands longer than 1MB. */
|
|
if (cmdlen > 1024*1024)
|
|
error (_("Command line too long."));
|
|
|
|
cmdline = (char *) xmalloc (cmdlen + 4);
|
|
strcpy (cmdline + 1, args);
|
|
/* If the command-line length fits into DOS 126-char limits, use the
|
|
DOS command tail format; otherwise, tell v2loadimage to pass it
|
|
through a buffer in conventional memory. */
|
|
if (cmdlen < 127)
|
|
{
|
|
cmdline[0] = strlen (args);
|
|
cmdline[cmdlen + 1] = 13;
|
|
}
|
|
else
|
|
cmdline[0] = 0xff; /* Signal v2loadimage it's a long command. */
|
|
|
|
environ = env;
|
|
|
|
result = v2loadimage (exec_file, cmdline, start_state);
|
|
|
|
environ = env_save;
|
|
xfree (cmdline);
|
|
|
|
if (result != 0)
|
|
error (_("Load failed for image %s"), exec_file);
|
|
|
|
edi_init (start_state);
|
|
#if __DJGPP_MINOR__ < 3
|
|
save_npx ();
|
|
#endif
|
|
|
|
inferior_ptid = ptid_t (SOME_PID);
|
|
inf = current_inferior ();
|
|
inferior_appeared (inf, SOME_PID);
|
|
|
|
if (!target_is_pushed (this))
|
|
push_target (this);
|
|
|
|
add_thread_silent (inferior_ptid);
|
|
|
|
clear_proceed_status (0);
|
|
insert_breakpoints ();
|
|
prog_has_started = 1;
|
|
}
|
|
|
|
void
|
|
go32_nat_target::mourn_inferior ()
|
|
{
|
|
ptid_t ptid;
|
|
|
|
redir_cmdline_delete (&child_cmd);
|
|
resume_signal = -1;
|
|
resume_is_step = 0;
|
|
|
|
cleanup_client ();
|
|
|
|
/* We need to make sure all the breakpoint enable bits in the DR7
|
|
register are reset when the inferior exits. Otherwise, if they
|
|
rerun the inferior, the uncleared bits may cause random SIGTRAPs,
|
|
failure to set more watchpoints, and other calamities. It would
|
|
be nice if GDB itself would take care to remove all breakpoints
|
|
at all times, but it doesn't, probably under an assumption that
|
|
the OS cleans up when the debuggee exits. */
|
|
x86_cleanup_dregs ();
|
|
|
|
ptid = inferior_ptid;
|
|
inferior_ptid = null_ptid;
|
|
prog_has_started = 0;
|
|
|
|
generic_mourn_inferior ();
|
|
maybe_unpush_target ();
|
|
}
|
|
|
|
/* Hardware watchpoint support. */
|
|
|
|
#define D_REGS edi.dr
|
|
#define CONTROL D_REGS[7]
|
|
#define STATUS D_REGS[6]
|
|
|
|
/* Pass the address ADDR to the inferior in the I'th debug register.
|
|
Here we just store the address in D_REGS, the watchpoint will be
|
|
actually set up when go32_wait runs the debuggee. */
|
|
static void
|
|
go32_set_dr (int i, CORE_ADDR addr)
|
|
{
|
|
if (i < 0 || i > 3)
|
|
internal_error (__FILE__, __LINE__,
|
|
_("Invalid register %d in go32_set_dr.\n"), i);
|
|
D_REGS[i] = addr;
|
|
}
|
|
|
|
/* Pass the value VAL to the inferior in the DR7 debug control
|
|
register. Here we just store the address in D_REGS, the watchpoint
|
|
will be actually set up when go32_wait runs the debuggee. */
|
|
static void
|
|
go32_set_dr7 (unsigned long val)
|
|
{
|
|
CONTROL = val;
|
|
}
|
|
|
|
/* Get the value of the DR6 debug status register from the inferior.
|
|
Here we just return the value stored in D_REGS, as we've got it
|
|
from the last go32_wait call. */
|
|
static unsigned long
|
|
go32_get_dr6 (void)
|
|
{
|
|
return STATUS;
|
|
}
|
|
|
|
/* Get the value of the DR7 debug status register from the inferior.
|
|
Here we just return the value stored in D_REGS, as we've got it
|
|
from the last go32_wait call. */
|
|
|
|
static unsigned long
|
|
go32_get_dr7 (void)
|
|
{
|
|
return CONTROL;
|
|
}
|
|
|
|
/* Get the value of the DR debug register I from the inferior. Here
|
|
we just return the value stored in D_REGS, as we've got it from the
|
|
last go32_wait call. */
|
|
|
|
static CORE_ADDR
|
|
go32_get_dr (int i)
|
|
{
|
|
if (i < 0 || i > 3)
|
|
internal_error (__FILE__, __LINE__,
|
|
_("Invalid register %d in go32_get_dr.\n"), i);
|
|
return D_REGS[i];
|
|
}
|
|
|
|
/* Put the device open on handle FD into either raw or cooked
|
|
mode, return 1 if it was in raw mode, zero otherwise. */
|
|
|
|
static int
|
|
device_mode (int fd, int raw_p)
|
|
{
|
|
int oldmode, newmode;
|
|
__dpmi_regs regs;
|
|
|
|
regs.x.ax = 0x4400;
|
|
regs.x.bx = fd;
|
|
__dpmi_int (0x21, ®s);
|
|
if (regs.x.flags & 1)
|
|
return -1;
|
|
newmode = oldmode = regs.x.dx;
|
|
|
|
if (raw_p)
|
|
newmode |= 0x20;
|
|
else
|
|
newmode &= ~0x20;
|
|
|
|
if (oldmode & 0x80) /* Only for character dev. */
|
|
{
|
|
regs.x.ax = 0x4401;
|
|
regs.x.bx = fd;
|
|
regs.x.dx = newmode & 0xff; /* Force upper byte zero, else it fails. */
|
|
__dpmi_int (0x21, ®s);
|
|
if (regs.x.flags & 1)
|
|
return -1;
|
|
}
|
|
return (oldmode & 0x20) == 0x20;
|
|
}
|
|
|
|
|
|
static int inf_mode_valid = 0;
|
|
static int inf_terminal_mode;
|
|
|
|
/* This semaphore is needed because, amazingly enough, GDB calls
|
|
target.to_terminal_ours more than once after the inferior stops.
|
|
But we need the information from the first call only, since the
|
|
second call will always see GDB's own cooked terminal. */
|
|
static int terminal_is_ours = 1;
|
|
|
|
void
|
|
go32_nat_target::terminal_init ()
|
|
{
|
|
inf_mode_valid = 0; /* Reinitialize, in case they are restarting child. */
|
|
terminal_is_ours = 1;
|
|
}
|
|
|
|
void
|
|
go32_nat_target::terminal_info (const char *args, int from_tty)
|
|
{
|
|
printf_unfiltered ("Inferior's terminal is in %s mode.\n",
|
|
!inf_mode_valid
|
|
? "default" : inf_terminal_mode ? "raw" : "cooked");
|
|
|
|
#if __DJGPP_MINOR__ > 2
|
|
if (child_cmd.redirection)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < DBG_HANDLES; i++)
|
|
{
|
|
if (child_cmd.redirection[i]->file_name)
|
|
printf_unfiltered ("\tFile handle %d is redirected to `%s'.\n",
|
|
i, child_cmd.redirection[i]->file_name);
|
|
else if (_get_dev_info (child_cmd.redirection[i]->inf_handle) == -1)
|
|
printf_unfiltered
|
|
("\tFile handle %d appears to be closed by inferior.\n", i);
|
|
/* Mask off the raw/cooked bit when comparing device info words. */
|
|
else if ((_get_dev_info (child_cmd.redirection[i]->inf_handle) & 0xdf)
|
|
!= (_get_dev_info (i) & 0xdf))
|
|
printf_unfiltered
|
|
("\tFile handle %d appears to be redirected by inferior.\n", i);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void
|
|
go32_nat_target::terminal_inferior ()
|
|
{
|
|
/* Redirect standard handles as child wants them. */
|
|
errno = 0;
|
|
if (redir_to_child (&child_cmd) == -1)
|
|
{
|
|
redir_to_debugger (&child_cmd);
|
|
error (_("Cannot redirect standard handles for program: %s."),
|
|
safe_strerror (errno));
|
|
}
|
|
/* Set the console device of the inferior to whatever mode
|
|
(raw or cooked) we found it last time. */
|
|
if (terminal_is_ours)
|
|
{
|
|
if (inf_mode_valid)
|
|
device_mode (0, inf_terminal_mode);
|
|
terminal_is_ours = 0;
|
|
}
|
|
}
|
|
|
|
void
|
|
go32_nat_target::terminal_ours ()
|
|
{
|
|
/* Switch to cooked mode on the gdb terminal and save the inferior
|
|
terminal mode to be restored when it is resumed. */
|
|
if (!terminal_is_ours)
|
|
{
|
|
inf_terminal_mode = device_mode (0, 0);
|
|
if (inf_terminal_mode != -1)
|
|
inf_mode_valid = 1;
|
|
else
|
|
/* If device_mode returned -1, we don't know what happens with
|
|
handle 0 anymore, so make the info invalid. */
|
|
inf_mode_valid = 0;
|
|
terminal_is_ours = 1;
|
|
|
|
/* Restore debugger's standard handles. */
|
|
errno = 0;
|
|
if (redir_to_debugger (&child_cmd) == -1)
|
|
{
|
|
redir_to_child (&child_cmd);
|
|
error (_("Cannot redirect standard handles for debugger: %s."),
|
|
safe_strerror (errno));
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
go32_nat_target::pass_ctrlc ()
|
|
{
|
|
}
|
|
|
|
bool
|
|
go32_nat_target::thread_alive (ptid_t ptid)
|
|
{
|
|
return ptid != null_ptid;
|
|
}
|
|
|
|
std::string
|
|
go32_nat_target::pid_to_str (ptid_t ptid)
|
|
{
|
|
return normal_pid_to_str (ptid);
|
|
}
|
|
|
|
/* Return the current DOS codepage number. */
|
|
static int
|
|
dos_codepage (void)
|
|
{
|
|
__dpmi_regs regs;
|
|
|
|
regs.x.ax = 0x6601;
|
|
__dpmi_int (0x21, ®s);
|
|
if (!(regs.x.flags & 1))
|
|
return regs.x.bx & 0xffff;
|
|
else
|
|
return 437; /* default */
|
|
}
|
|
|
|
/* Limited emulation of `nl_langinfo', for charset.c. */
|
|
char *
|
|
nl_langinfo (nl_item item)
|
|
{
|
|
char *retval;
|
|
|
|
switch (item)
|
|
{
|
|
case CODESET:
|
|
{
|
|
/* 8 is enough for SHORT_MAX + "CP" + null. */
|
|
char buf[8];
|
|
int blen = sizeof (buf);
|
|
int needed = snprintf (buf, blen, "CP%d", dos_codepage ());
|
|
|
|
if (needed > blen) /* Should never happen. */
|
|
buf[0] = 0;
|
|
retval = xstrdup (buf);
|
|
}
|
|
break;
|
|
default:
|
|
retval = xstrdup ("");
|
|
break;
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
unsigned short windows_major, windows_minor;
|
|
|
|
/* Compute the version Windows reports via Int 2Fh/AX=1600h. */
|
|
static void
|
|
go32_get_windows_version(void)
|
|
{
|
|
__dpmi_regs r;
|
|
|
|
r.x.ax = 0x1600;
|
|
__dpmi_int(0x2f, &r);
|
|
if (r.h.al > 2 && r.h.al != 0x80 && r.h.al != 0xff
|
|
&& (r.h.al > 3 || r.h.ah > 0))
|
|
{
|
|
windows_major = r.h.al;
|
|
windows_minor = r.h.ah;
|
|
}
|
|
else
|
|
windows_major = 0xff; /* meaning no Windows */
|
|
}
|
|
|
|
/* A subroutine of go32_sysinfo to display memory info. */
|
|
static void
|
|
print_mem (unsigned long datum, const char *header, int in_pages_p)
|
|
{
|
|
if (datum != 0xffffffffUL)
|
|
{
|
|
if (in_pages_p)
|
|
datum <<= 12;
|
|
puts_filtered (header);
|
|
if (datum > 1024)
|
|
{
|
|
printf_filtered ("%lu KB", datum >> 10);
|
|
if (datum > 1024 * 1024)
|
|
printf_filtered (" (%lu MB)", datum >> 20);
|
|
}
|
|
else
|
|
printf_filtered ("%lu Bytes", datum);
|
|
puts_filtered ("\n");
|
|
}
|
|
}
|
|
|
|
/* Display assorted information about the underlying OS. */
|
|
static void
|
|
go32_sysinfo (const char *arg, int from_tty)
|
|
{
|
|
static const char test_pattern[] =
|
|
"deadbeafdeadbeafdeadbeafdeadbeafdeadbeaf"
|
|
"deadbeafdeadbeafdeadbeafdeadbeafdeadbeaf"
|
|
"deadbeafdeadbeafdeadbeafdeadbeafdeadbeafdeadbeaf";
|
|
struct utsname u;
|
|
char cpuid_vendor[13];
|
|
unsigned cpuid_max = 0, cpuid_eax, cpuid_ebx, cpuid_ecx, cpuid_edx;
|
|
unsigned true_dos_version = _get_dos_version (1);
|
|
unsigned advertized_dos_version = ((unsigned int)_osmajor << 8) | _osminor;
|
|
int dpmi_flags;
|
|
char dpmi_vendor_info[129];
|
|
int dpmi_vendor_available;
|
|
__dpmi_version_ret dpmi_version_data;
|
|
long eflags;
|
|
__dpmi_free_mem_info mem_info;
|
|
__dpmi_regs regs;
|
|
|
|
cpuid_vendor[0] = '\0';
|
|
if (uname (&u))
|
|
strcpy (u.machine, "Unknown x86");
|
|
else if (u.machine[0] == 'i' && u.machine[1] > 4)
|
|
{
|
|
/* CPUID with EAX = 0 returns the Vendor ID. */
|
|
#if 0
|
|
/* Ideally we would use x86_cpuid(), but it needs someone to run
|
|
native tests first to make sure things actually work. They should.
|
|
http://sourceware.org/ml/gdb-patches/2013-05/msg00164.html */
|
|
unsigned int eax, ebx, ecx, edx;
|
|
|
|
if (x86_cpuid (0, &eax, &ebx, &ecx, &edx))
|
|
{
|
|
cpuid_max = eax;
|
|
memcpy (&vendor[0], &ebx, 4);
|
|
memcpy (&vendor[4], &ecx, 4);
|
|
memcpy (&vendor[8], &edx, 4);
|
|
cpuid_vendor[12] = '\0';
|
|
}
|
|
#else
|
|
__asm__ __volatile__ ("xorl %%ebx, %%ebx;"
|
|
"xorl %%ecx, %%ecx;"
|
|
"xorl %%edx, %%edx;"
|
|
"movl $0, %%eax;"
|
|
"cpuid;"
|
|
"movl %%ebx, %0;"
|
|
"movl %%edx, %1;"
|
|
"movl %%ecx, %2;"
|
|
"movl %%eax, %3;"
|
|
: "=m" (cpuid_vendor[0]),
|
|
"=m" (cpuid_vendor[4]),
|
|
"=m" (cpuid_vendor[8]),
|
|
"=m" (cpuid_max)
|
|
:
|
|
: "%eax", "%ebx", "%ecx", "%edx");
|
|
cpuid_vendor[12] = '\0';
|
|
#endif
|
|
}
|
|
|
|
printf_filtered ("CPU Type.......................%s", u.machine);
|
|
if (cpuid_vendor[0])
|
|
printf_filtered (" (%s)", cpuid_vendor);
|
|
puts_filtered ("\n");
|
|
|
|
/* CPUID with EAX = 1 returns processor signature and features. */
|
|
if (cpuid_max >= 1)
|
|
{
|
|
static const char *brand_name[] = {
|
|
"",
|
|
" Celeron",
|
|
" III",
|
|
" III Xeon",
|
|
"", "", "", "",
|
|
" 4"
|
|
};
|
|
char cpu_string[80];
|
|
char cpu_brand[20];
|
|
unsigned brand_idx;
|
|
int intel_p = strcmp (cpuid_vendor, "GenuineIntel") == 0;
|
|
int amd_p = strcmp (cpuid_vendor, "AuthenticAMD") == 0;
|
|
int hygon_p = strcmp (cpuid_vendor, "HygonGenuine") == 0;
|
|
unsigned cpu_family, cpu_model;
|
|
|
|
#if 0
|
|
/* See comment above about cpuid usage. */
|
|
x86_cpuid (1, &cpuid_eax, &cpuid_ebx, NULL, &cpuid_edx);
|
|
#else
|
|
__asm__ __volatile__ ("movl $1, %%eax;"
|
|
"cpuid;"
|
|
: "=a" (cpuid_eax),
|
|
"=b" (cpuid_ebx),
|
|
"=d" (cpuid_edx)
|
|
:
|
|
: "%ecx");
|
|
#endif
|
|
brand_idx = cpuid_ebx & 0xff;
|
|
cpu_family = (cpuid_eax >> 8) & 0xf;
|
|
cpu_model = (cpuid_eax >> 4) & 0xf;
|
|
cpu_brand[0] = '\0';
|
|
if (intel_p)
|
|
{
|
|
if (brand_idx > 0
|
|
&& brand_idx < sizeof(brand_name)/sizeof(brand_name[0])
|
|
&& *brand_name[brand_idx])
|
|
strcpy (cpu_brand, brand_name[brand_idx]);
|
|
else if (cpu_family == 5)
|
|
{
|
|
if (((cpuid_eax >> 12) & 3) == 0 && cpu_model == 4)
|
|
strcpy (cpu_brand, " MMX");
|
|
else if (cpu_model > 1 && ((cpuid_eax >> 12) & 3) == 1)
|
|
strcpy (cpu_brand, " OverDrive");
|
|
else if (cpu_model > 1 && ((cpuid_eax >> 12) & 3) == 2)
|
|
strcpy (cpu_brand, " Dual");
|
|
}
|
|
else if (cpu_family == 6 && cpu_model < 8)
|
|
{
|
|
switch (cpu_model)
|
|
{
|
|
case 1:
|
|
strcpy (cpu_brand, " Pro");
|
|
break;
|
|
case 3:
|
|
strcpy (cpu_brand, " II");
|
|
break;
|
|
case 5:
|
|
strcpy (cpu_brand, " II Xeon");
|
|
break;
|
|
case 6:
|
|
strcpy (cpu_brand, " Celeron");
|
|
break;
|
|
case 7:
|
|
strcpy (cpu_brand, " III");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else if (amd_p)
|
|
{
|
|
switch (cpu_family)
|
|
{
|
|
case 4:
|
|
strcpy (cpu_brand, "486/5x86");
|
|
break;
|
|
case 5:
|
|
switch (cpu_model)
|
|
{
|
|
case 0:
|
|
case 1:
|
|
case 2:
|
|
case 3:
|
|
strcpy (cpu_brand, "-K5");
|
|
break;
|
|
case 6:
|
|
case 7:
|
|
strcpy (cpu_brand, "-K6");
|
|
break;
|
|
case 8:
|
|
strcpy (cpu_brand, "-K6-2");
|
|
break;
|
|
case 9:
|
|
strcpy (cpu_brand, "-K6-III");
|
|
break;
|
|
}
|
|
break;
|
|
case 6:
|
|
switch (cpu_model)
|
|
{
|
|
case 1:
|
|
case 2:
|
|
case 4:
|
|
strcpy (cpu_brand, " Athlon");
|
|
break;
|
|
case 3:
|
|
strcpy (cpu_brand, " Duron");
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
xsnprintf (cpu_string, sizeof (cpu_string), "%s%s Model %d Stepping %d",
|
|
intel_p ? "Pentium" : (amd_p ? "AMD" : (hygon_p ? "Hygon" : "ix86")),
|
|
cpu_brand, cpu_model, cpuid_eax & 0xf);
|
|
printfi_filtered (31, "%s\n", cpu_string);
|
|
if (((cpuid_edx & (6 | (0x0d << 23))) != 0)
|
|
|| ((cpuid_edx & 1) == 0)
|
|
|| ((amd_p || hygon_p) && (cpuid_edx & (3 << 30)) != 0))
|
|
{
|
|
puts_filtered ("CPU Features...................");
|
|
/* We only list features which might be useful in the DPMI
|
|
environment. */
|
|
if ((cpuid_edx & 1) == 0)
|
|
puts_filtered ("No FPU "); /* It's unusual to not have an FPU. */
|
|
if ((cpuid_edx & (1 << 1)) != 0)
|
|
puts_filtered ("VME ");
|
|
if ((cpuid_edx & (1 << 2)) != 0)
|
|
puts_filtered ("DE ");
|
|
if ((cpuid_edx & (1 << 4)) != 0)
|
|
puts_filtered ("TSC ");
|
|
if ((cpuid_edx & (1 << 23)) != 0)
|
|
puts_filtered ("MMX ");
|
|
if ((cpuid_edx & (1 << 25)) != 0)
|
|
puts_filtered ("SSE ");
|
|
if ((cpuid_edx & (1 << 26)) != 0)
|
|
puts_filtered ("SSE2 ");
|
|
if (amd_p || hygon_p)
|
|
{
|
|
if ((cpuid_edx & (1 << 31)) != 0)
|
|
puts_filtered ("3DNow! ");
|
|
if ((cpuid_edx & (1 << 30)) != 0)
|
|
puts_filtered ("3DNow!Ext");
|
|
}
|
|
puts_filtered ("\n");
|
|
}
|
|
}
|
|
puts_filtered ("\n");
|
|
printf_filtered ("DOS Version....................%s %s.%s",
|
|
_os_flavor, u.release, u.version);
|
|
if (true_dos_version != advertized_dos_version)
|
|
printf_filtered (" (disguised as v%d.%d)", _osmajor, _osminor);
|
|
puts_filtered ("\n");
|
|
if (!windows_major)
|
|
go32_get_windows_version ();
|
|
if (windows_major != 0xff)
|
|
{
|
|
const char *windows_flavor;
|
|
|
|
printf_filtered ("Windows Version................%d.%02d (Windows ",
|
|
windows_major, windows_minor);
|
|
switch (windows_major)
|
|
{
|
|
case 3:
|
|
windows_flavor = "3.X";
|
|
break;
|
|
case 4:
|
|
switch (windows_minor)
|
|
{
|
|
case 0:
|
|
windows_flavor = "95, 95A, or 95B";
|
|
break;
|
|
case 3:
|
|
windows_flavor = "95B OSR2.1 or 95C OSR2.5";
|
|
break;
|
|
case 10:
|
|
windows_flavor = "98 or 98 SE";
|
|
break;
|
|
case 90:
|
|
windows_flavor = "ME";
|
|
break;
|
|
default:
|
|
windows_flavor = "9X";
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
windows_flavor = "??";
|
|
break;
|
|
}
|
|
printf_filtered ("%s)\n", windows_flavor);
|
|
}
|
|
else if (true_dos_version == 0x532 && advertized_dos_version == 0x500)
|
|
printf_filtered ("Windows Version................"
|
|
"Windows NT family (W2K/XP/W2K3/Vista/W2K8)\n");
|
|
puts_filtered ("\n");
|
|
/* On some versions of Windows, __dpmi_get_capabilities returns
|
|
zero, but the buffer is not filled with info, so we fill the
|
|
buffer with a known pattern and test for it afterwards. */
|
|
memcpy (dpmi_vendor_info, test_pattern, sizeof(dpmi_vendor_info));
|
|
dpmi_vendor_available =
|
|
__dpmi_get_capabilities (&dpmi_flags, dpmi_vendor_info);
|
|
if (dpmi_vendor_available == 0
|
|
&& memcmp (dpmi_vendor_info, test_pattern,
|
|
sizeof(dpmi_vendor_info)) != 0)
|
|
{
|
|
/* The DPMI spec says the vendor string should be ASCIIZ, but
|
|
I don't trust the vendors to follow that... */
|
|
if (!memchr (&dpmi_vendor_info[2], 0, 126))
|
|
dpmi_vendor_info[128] = '\0';
|
|
printf_filtered ("DPMI Host......................"
|
|
"%s v%d.%d (capabilities: %#x)\n",
|
|
&dpmi_vendor_info[2],
|
|
(unsigned)dpmi_vendor_info[0],
|
|
(unsigned)dpmi_vendor_info[1],
|
|
((unsigned)dpmi_flags & 0x7f));
|
|
}
|
|
else
|
|
printf_filtered ("DPMI Host......................(Info not available)\n");
|
|
__dpmi_get_version (&dpmi_version_data);
|
|
printf_filtered ("DPMI Version...................%d.%02d\n",
|
|
dpmi_version_data.major, dpmi_version_data.minor);
|
|
printf_filtered ("DPMI Info......................"
|
|
"%s-bit DPMI, with%s Virtual Memory support\n",
|
|
(dpmi_version_data.flags & 1) ? "32" : "16",
|
|
(dpmi_version_data.flags & 4) ? "" : "out");
|
|
printfi_filtered (31, "Interrupts reflected to %s mode\n",
|
|
(dpmi_version_data.flags & 2) ? "V86" : "Real");
|
|
printfi_filtered (31, "Processor type: i%d86\n",
|
|
dpmi_version_data.cpu);
|
|
printfi_filtered (31, "PIC base interrupt: Master: %#x Slave: %#x\n",
|
|
dpmi_version_data.master_pic, dpmi_version_data.slave_pic);
|
|
|
|
/* a_tss is only initialized when the debuggee is first run. */
|
|
if (prog_has_started)
|
|
{
|
|
__asm__ __volatile__ ("pushfl ; popl %0" : "=g" (eflags));
|
|
printf_filtered ("Protection....................."
|
|
"Ring %d (in %s), with%s I/O protection\n",
|
|
a_tss.tss_cs & 3, (a_tss.tss_cs & 4) ? "LDT" : "GDT",
|
|
(a_tss.tss_cs & 3) > ((eflags >> 12) & 3) ? "" : "out");
|
|
}
|
|
puts_filtered ("\n");
|
|
__dpmi_get_free_memory_information (&mem_info);
|
|
print_mem (mem_info.total_number_of_physical_pages,
|
|
"DPMI Total Physical Memory.....", 1);
|
|
print_mem (mem_info.total_number_of_free_pages,
|
|
"DPMI Free Physical Memory......", 1);
|
|
print_mem (mem_info.size_of_paging_file_partition_in_pages,
|
|
"DPMI Swap Space................", 1);
|
|
print_mem (mem_info.linear_address_space_size_in_pages,
|
|
"DPMI Total Linear Address Size.", 1);
|
|
print_mem (mem_info.free_linear_address_space_in_pages,
|
|
"DPMI Free Linear Address Size..", 1);
|
|
print_mem (mem_info.largest_available_free_block_in_bytes,
|
|
"DPMI Largest Free Memory Block.", 0);
|
|
|
|
regs.h.ah = 0x48;
|
|
regs.x.bx = 0xffff;
|
|
__dpmi_int (0x21, ®s);
|
|
print_mem (regs.x.bx << 4, "Free DOS Memory................", 0);
|
|
regs.x.ax = 0x5800;
|
|
__dpmi_int (0x21, ®s);
|
|
if ((regs.x.flags & 1) == 0)
|
|
{
|
|
static const char *dos_hilo[] = {
|
|
"Low", "", "", "", "High", "", "", "", "High, then Low"
|
|
};
|
|
static const char *dos_fit[] = {
|
|
"First", "Best", "Last"
|
|
};
|
|
int hilo_idx = (regs.x.ax >> 4) & 0x0f;
|
|
int fit_idx = regs.x.ax & 0x0f;
|
|
|
|
if (hilo_idx > 8)
|
|
hilo_idx = 0;
|
|
if (fit_idx > 2)
|
|
fit_idx = 0;
|
|
printf_filtered ("DOS Memory Allocation..........%s memory, %s fit\n",
|
|
dos_hilo[hilo_idx], dos_fit[fit_idx]);
|
|
regs.x.ax = 0x5802;
|
|
__dpmi_int (0x21, ®s);
|
|
if ((regs.x.flags & 1) != 0)
|
|
regs.h.al = 0;
|
|
printfi_filtered (31, "UMBs %sin DOS memory chain\n",
|
|
regs.h.al == 0 ? "not " : "");
|
|
}
|
|
}
|
|
|
|
struct seg_descr {
|
|
unsigned short limit0;
|
|
unsigned short base0;
|
|
unsigned char base1;
|
|
unsigned stype:5;
|
|
unsigned dpl:2;
|
|
unsigned present:1;
|
|
unsigned limit1:4;
|
|
unsigned available:1;
|
|
unsigned dummy:1;
|
|
unsigned bit32:1;
|
|
unsigned page_granular:1;
|
|
unsigned char base2;
|
|
} __attribute__ ((packed));
|
|
|
|
struct gate_descr {
|
|
unsigned short offset0;
|
|
unsigned short selector;
|
|
unsigned param_count:5;
|
|
unsigned dummy:3;
|
|
unsigned stype:5;
|
|
unsigned dpl:2;
|
|
unsigned present:1;
|
|
unsigned short offset1;
|
|
} __attribute__ ((packed));
|
|
|
|
/* Read LEN bytes starting at logical address ADDR, and put the result
|
|
into DEST. Return 1 if success, zero if not. */
|
|
static int
|
|
read_memory_region (unsigned long addr, void *dest, size_t len)
|
|
{
|
|
unsigned long dos_ds_limit = __dpmi_get_segment_limit (_dos_ds);
|
|
int retval = 1;
|
|
|
|
/* For the low memory, we can simply use _dos_ds. */
|
|
if (addr <= dos_ds_limit - len)
|
|
dosmemget (addr, len, dest);
|
|
else
|
|
{
|
|
/* For memory above 1MB we need to set up a special segment to
|
|
be able to access that memory. */
|
|
int sel = __dpmi_allocate_ldt_descriptors (1);
|
|
|
|
if (sel <= 0)
|
|
retval = 0;
|
|
else
|
|
{
|
|
int access_rights = __dpmi_get_descriptor_access_rights (sel);
|
|
size_t segment_limit = len - 1;
|
|
|
|
/* Make sure the crucial bits in the descriptor access
|
|
rights are set correctly. Some DPMI providers might barf
|
|
if we set the segment limit to something that is not an
|
|
integral multiple of 4KB pages if the granularity bit is
|
|
not set to byte-granular, even though the DPMI spec says
|
|
it's the host's responsibility to set that bit correctly. */
|
|
if (len > 1024 * 1024)
|
|
{
|
|
access_rights |= 0x8000;
|
|
/* Page-granular segments should have the low 12 bits of
|
|
the limit set. */
|
|
segment_limit |= 0xfff;
|
|
}
|
|
else
|
|
access_rights &= ~0x8000;
|
|
|
|
if (__dpmi_set_segment_base_address (sel, addr) != -1
|
|
&& __dpmi_set_descriptor_access_rights (sel, access_rights) != -1
|
|
&& __dpmi_set_segment_limit (sel, segment_limit) != -1
|
|
/* W2K silently fails to set the segment limit, leaving
|
|
it at zero; this test avoids the resulting crash. */
|
|
&& __dpmi_get_segment_limit (sel) >= segment_limit)
|
|
movedata (sel, 0, _my_ds (), (unsigned)dest, len);
|
|
else
|
|
retval = 0;
|
|
|
|
__dpmi_free_ldt_descriptor (sel);
|
|
}
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
/* Get a segment descriptor stored at index IDX in the descriptor
|
|
table whose base address is TABLE_BASE. Return the descriptor
|
|
type, or -1 if failure. */
|
|
static int
|
|
get_descriptor (unsigned long table_base, int idx, void *descr)
|
|
{
|
|
unsigned long addr = table_base + idx * 8; /* 8 bytes per entry */
|
|
|
|
if (read_memory_region (addr, descr, 8))
|
|
return (int)((struct seg_descr *)descr)->stype;
|
|
return -1;
|
|
}
|
|
|
|
struct dtr_reg {
|
|
unsigned short limit __attribute__((packed));
|
|
unsigned long base __attribute__((packed));
|
|
};
|
|
|
|
/* Display a segment descriptor stored at index IDX in a descriptor
|
|
table whose type is TYPE and whose base address is BASE_ADDR. If
|
|
FORCE is non-zero, display even invalid descriptors. */
|
|
static void
|
|
display_descriptor (unsigned type, unsigned long base_addr, int idx, int force)
|
|
{
|
|
struct seg_descr descr;
|
|
struct gate_descr gate;
|
|
|
|
/* Get the descriptor from the table. */
|
|
if (idx == 0 && type == 0)
|
|
puts_filtered ("0x000: null descriptor\n");
|
|
else if (get_descriptor (base_addr, idx, &descr) != -1)
|
|
{
|
|
/* For each type of descriptor table, this has a bit set if the
|
|
corresponding type of selectors is valid in that table. */
|
|
static unsigned allowed_descriptors[] = {
|
|
0xffffdafeL, /* GDT */
|
|
0x0000c0e0L, /* IDT */
|
|
0xffffdafaL /* LDT */
|
|
};
|
|
|
|
/* If the program hasn't started yet, assume the debuggee will
|
|
have the same CPL as the debugger. */
|
|
int cpl = prog_has_started ? (a_tss.tss_cs & 3) : _my_cs () & 3;
|
|
unsigned long limit = (descr.limit1 << 16) | descr.limit0;
|
|
|
|
if (descr.present
|
|
&& (allowed_descriptors[type] & (1 << descr.stype)) != 0)
|
|
{
|
|
printf_filtered ("0x%03x: ",
|
|
type == 1
|
|
? idx : (idx * 8) | (type ? (cpl | 4) : 0));
|
|
if (descr.page_granular)
|
|
limit = (limit << 12) | 0xfff; /* big segment: low 12 bit set */
|
|
if (descr.stype == 1 || descr.stype == 2 || descr.stype == 3
|
|
|| descr.stype == 9 || descr.stype == 11
|
|
|| (descr.stype >= 16 && descr.stype < 32))
|
|
printf_filtered ("base=0x%02x%02x%04x limit=0x%08lx",
|
|
descr.base2, descr.base1, descr.base0, limit);
|
|
|
|
switch (descr.stype)
|
|
{
|
|
case 1:
|
|
case 3:
|
|
printf_filtered (" 16-bit TSS (task %sactive)",
|
|
descr.stype == 3 ? "" : "in");
|
|
break;
|
|
case 2:
|
|
puts_filtered (" LDT");
|
|
break;
|
|
case 4:
|
|
memcpy (&gate, &descr, sizeof gate);
|
|
printf_filtered ("selector=0x%04x offs=0x%04x%04x",
|
|
gate.selector, gate.offset1, gate.offset0);
|
|
printf_filtered (" 16-bit Call Gate (params=%d)",
|
|
gate.param_count);
|
|
break;
|
|
case 5:
|
|
printf_filtered ("TSS selector=0x%04x", descr.base0);
|
|
printfi_filtered (16, "Task Gate");
|
|
break;
|
|
case 6:
|
|
case 7:
|
|
memcpy (&gate, &descr, sizeof gate);
|
|
printf_filtered ("selector=0x%04x offs=0x%04x%04x",
|
|
gate.selector, gate.offset1, gate.offset0);
|
|
printf_filtered (" 16-bit %s Gate",
|
|
descr.stype == 6 ? "Interrupt" : "Trap");
|
|
break;
|
|
case 9:
|
|
case 11:
|
|
printf_filtered (" 32-bit TSS (task %sactive)",
|
|
descr.stype == 3 ? "" : "in");
|
|
break;
|
|
case 12:
|
|
memcpy (&gate, &descr, sizeof gate);
|
|
printf_filtered ("selector=0x%04x offs=0x%04x%04x",
|
|
gate.selector, gate.offset1, gate.offset0);
|
|
printf_filtered (" 32-bit Call Gate (params=%d)",
|
|
gate.param_count);
|
|
break;
|
|
case 14:
|
|
case 15:
|
|
memcpy (&gate, &descr, sizeof gate);
|
|
printf_filtered ("selector=0x%04x offs=0x%04x%04x",
|
|
gate.selector, gate.offset1, gate.offset0);
|
|
printf_filtered (" 32-bit %s Gate",
|
|
descr.stype == 14 ? "Interrupt" : "Trap");
|
|
break;
|
|
case 16: /* data segments */
|
|
case 17:
|
|
case 18:
|
|
case 19:
|
|
case 20:
|
|
case 21:
|
|
case 22:
|
|
case 23:
|
|
printf_filtered (" %s-bit Data (%s Exp-%s%s)",
|
|
descr.bit32 ? "32" : "16",
|
|
descr.stype & 2
|
|
? "Read/Write," : "Read-Only, ",
|
|
descr.stype & 4 ? "down" : "up",
|
|
descr.stype & 1 ? "" : ", N.Acc");
|
|
break;
|
|
case 24: /* code segments */
|
|
case 25:
|
|
case 26:
|
|
case 27:
|
|
case 28:
|
|
case 29:
|
|
case 30:
|
|
case 31:
|
|
printf_filtered (" %s-bit Code (%s, %sConf%s)",
|
|
descr.bit32 ? "32" : "16",
|
|
descr.stype & 2 ? "Exec/Read" : "Exec-Only",
|
|
descr.stype & 4 ? "" : "N.",
|
|
descr.stype & 1 ? "" : ", N.Acc");
|
|
break;
|
|
default:
|
|
printf_filtered ("Unknown type 0x%02x", descr.stype);
|
|
break;
|
|
}
|
|
puts_filtered ("\n");
|
|
}
|
|
else if (force)
|
|
{
|
|
printf_filtered ("0x%03x: ",
|
|
type == 1
|
|
? idx : (idx * 8) | (type ? (cpl | 4) : 0));
|
|
if (!descr.present)
|
|
puts_filtered ("Segment not present\n");
|
|
else
|
|
printf_filtered ("Segment type 0x%02x is invalid in this table\n",
|
|
descr.stype);
|
|
}
|
|
}
|
|
else if (force)
|
|
printf_filtered ("0x%03x: Cannot read this descriptor\n", idx);
|
|
}
|
|
|
|
static void
|
|
go32_sldt (const char *arg, int from_tty)
|
|
{
|
|
struct dtr_reg gdtr;
|
|
unsigned short ldtr = 0;
|
|
int ldt_idx;
|
|
struct seg_descr ldt_descr;
|
|
long ldt_entry = -1L;
|
|
int cpl = (prog_has_started ? a_tss.tss_cs : _my_cs ()) & 3;
|
|
|
|
if (arg && *arg)
|
|
{
|
|
arg = skip_spaces (arg);
|
|
|
|
if (*arg)
|
|
{
|
|
ldt_entry = parse_and_eval_long (arg);
|
|
if (ldt_entry < 0
|
|
|| (ldt_entry & 4) == 0
|
|
|| (ldt_entry & 3) != (cpl & 3))
|
|
error (_("Invalid LDT entry 0x%03lx."), (unsigned long)ldt_entry);
|
|
}
|
|
}
|
|
|
|
__asm__ __volatile__ ("sgdt %0" : "=m" (gdtr) : /* no inputs */ );
|
|
__asm__ __volatile__ ("sldt %0" : "=m" (ldtr) : /* no inputs */ );
|
|
ldt_idx = ldtr / 8;
|
|
if (ldt_idx == 0)
|
|
puts_filtered ("There is no LDT.\n");
|
|
/* LDT's entry in the GDT must have the type LDT, which is 2. */
|
|
else if (get_descriptor (gdtr.base, ldt_idx, &ldt_descr) != 2)
|
|
printf_filtered ("LDT is present (at %#x), but unreadable by GDB.\n",
|
|
ldt_descr.base0
|
|
| (ldt_descr.base1 << 16)
|
|
| (ldt_descr.base2 << 24));
|
|
else
|
|
{
|
|
unsigned base =
|
|
ldt_descr.base0
|
|
| (ldt_descr.base1 << 16)
|
|
| (ldt_descr.base2 << 24);
|
|
unsigned limit = ldt_descr.limit0 | (ldt_descr.limit1 << 16);
|
|
int max_entry;
|
|
|
|
if (ldt_descr.page_granular)
|
|
/* Page-granular segments must have the low 12 bits of their
|
|
limit set. */
|
|
limit = (limit << 12) | 0xfff;
|
|
/* LDT cannot have more than 8K 8-byte entries, i.e. more than
|
|
64KB. */
|
|
if (limit > 0xffff)
|
|
limit = 0xffff;
|
|
|
|
max_entry = (limit + 1) / 8;
|
|
|
|
if (ldt_entry >= 0)
|
|
{
|
|
if (ldt_entry > limit)
|
|
error (_("Invalid LDT entry %#lx: outside valid limits [0..%#x]"),
|
|
(unsigned long)ldt_entry, limit);
|
|
|
|
display_descriptor (ldt_descr.stype, base, ldt_entry / 8, 1);
|
|
}
|
|
else
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < max_entry; i++)
|
|
display_descriptor (ldt_descr.stype, base, i, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
go32_sgdt (const char *arg, int from_tty)
|
|
{
|
|
struct dtr_reg gdtr;
|
|
long gdt_entry = -1L;
|
|
int max_entry;
|
|
|
|
if (arg && *arg)
|
|
{
|
|
arg = skip_spaces (arg);
|
|
|
|
if (*arg)
|
|
{
|
|
gdt_entry = parse_and_eval_long (arg);
|
|
if (gdt_entry < 0 || (gdt_entry & 7) != 0)
|
|
error (_("Invalid GDT entry 0x%03lx: "
|
|
"not an integral multiple of 8."),
|
|
(unsigned long)gdt_entry);
|
|
}
|
|
}
|
|
|
|
__asm__ __volatile__ ("sgdt %0" : "=m" (gdtr) : /* no inputs */ );
|
|
max_entry = (gdtr.limit + 1) / 8;
|
|
|
|
if (gdt_entry >= 0)
|
|
{
|
|
if (gdt_entry > gdtr.limit)
|
|
error (_("Invalid GDT entry %#lx: outside valid limits [0..%#x]"),
|
|
(unsigned long)gdt_entry, gdtr.limit);
|
|
|
|
display_descriptor (0, gdtr.base, gdt_entry / 8, 1);
|
|
}
|
|
else
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < max_entry; i++)
|
|
display_descriptor (0, gdtr.base, i, 0);
|
|
}
|
|
}
|
|
|
|
static void
|
|
go32_sidt (const char *arg, int from_tty)
|
|
{
|
|
struct dtr_reg idtr;
|
|
long idt_entry = -1L;
|
|
int max_entry;
|
|
|
|
if (arg && *arg)
|
|
{
|
|
arg = skip_spaces (arg);
|
|
|
|
if (*arg)
|
|
{
|
|
idt_entry = parse_and_eval_long (arg);
|
|
if (idt_entry < 0)
|
|
error (_("Invalid (negative) IDT entry %ld."), idt_entry);
|
|
}
|
|
}
|
|
|
|
__asm__ __volatile__ ("sidt %0" : "=m" (idtr) : /* no inputs */ );
|
|
max_entry = (idtr.limit + 1) / 8;
|
|
if (max_entry > 0x100) /* No more than 256 entries. */
|
|
max_entry = 0x100;
|
|
|
|
if (idt_entry >= 0)
|
|
{
|
|
if (idt_entry > idtr.limit)
|
|
error (_("Invalid IDT entry %#lx: outside valid limits [0..%#x]"),
|
|
(unsigned long)idt_entry, idtr.limit);
|
|
|
|
display_descriptor (1, idtr.base, idt_entry, 1);
|
|
}
|
|
else
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < max_entry; i++)
|
|
display_descriptor (1, idtr.base, i, 0);
|
|
}
|
|
}
|
|
|
|
/* Cached linear address of the base of the page directory. For
|
|
now, available only under CWSDPMI. Code based on ideas and
|
|
suggestions from Charles Sandmann <sandmann@clio.rice.edu>. */
|
|
static unsigned long pdbr;
|
|
|
|
static unsigned long
|
|
get_cr3 (void)
|
|
{
|
|
unsigned offset;
|
|
unsigned taskreg;
|
|
unsigned long taskbase, cr3;
|
|
struct dtr_reg gdtr;
|
|
|
|
if (pdbr > 0 && pdbr <= 0xfffff)
|
|
return pdbr;
|
|
|
|
/* Get the linear address of GDT and the Task Register. */
|
|
__asm__ __volatile__ ("sgdt %0" : "=m" (gdtr) : /* no inputs */ );
|
|
__asm__ __volatile__ ("str %0" : "=m" (taskreg) : /* no inputs */ );
|
|
|
|
/* Task Register is a segment selector for the TSS of the current
|
|
task. Therefore, it can be used as an index into the GDT to get
|
|
at the segment descriptor for the TSS. To get the index, reset
|
|
the low 3 bits of the selector (which give the CPL). Add 2 to the
|
|
offset to point to the 3 low bytes of the base address. */
|
|
offset = gdtr.base + (taskreg & 0xfff8) + 2;
|
|
|
|
|
|
/* CWSDPMI's task base is always under the 1MB mark. */
|
|
if (offset > 0xfffff)
|
|
return 0;
|
|
|
|
_farsetsel (_dos_ds);
|
|
taskbase = _farnspeekl (offset) & 0xffffffU;
|
|
taskbase += _farnspeekl (offset + 2) & 0xff000000U;
|
|
if (taskbase > 0xfffff)
|
|
return 0;
|
|
|
|
/* CR3 (a.k.a. PDBR, the Page Directory Base Register) is stored at
|
|
offset 1Ch in the TSS. */
|
|
cr3 = _farnspeekl (taskbase + 0x1c) & ~0xfff;
|
|
if (cr3 > 0xfffff)
|
|
{
|
|
#if 0 /* Not fully supported yet. */
|
|
/* The Page Directory is in UMBs. In that case, CWSDPMI puts
|
|
the first Page Table right below the Page Directory. Thus,
|
|
the first Page Table's entry for its own address and the Page
|
|
Directory entry for that Page Table will hold the same
|
|
physical address. The loop below searches the entire UMB
|
|
range of addresses for such an occurrence. */
|
|
unsigned long addr, pte_idx;
|
|
|
|
for (addr = 0xb0000, pte_idx = 0xb0;
|
|
pte_idx < 0xff;
|
|
addr += 0x1000, pte_idx++)
|
|
{
|
|
if (((_farnspeekl (addr + 4 * pte_idx) & 0xfffff027) ==
|
|
(_farnspeekl (addr + 0x1000) & 0xfffff027))
|
|
&& ((_farnspeekl (addr + 4 * pte_idx + 4) & 0xfffff000) == cr3))
|
|
{
|
|
cr3 = addr + 0x1000;
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (cr3 > 0xfffff)
|
|
cr3 = 0;
|
|
}
|
|
|
|
return cr3;
|
|
}
|
|
|
|
/* Return the N'th Page Directory entry. */
|
|
static unsigned long
|
|
get_pde (int n)
|
|
{
|
|
unsigned long pde = 0;
|
|
|
|
if (pdbr && n >= 0 && n < 1024)
|
|
{
|
|
pde = _farpeekl (_dos_ds, pdbr + 4*n);
|
|
}
|
|
return pde;
|
|
}
|
|
|
|
/* Return the N'th entry of the Page Table whose Page Directory entry
|
|
is PDE. */
|
|
static unsigned long
|
|
get_pte (unsigned long pde, int n)
|
|
{
|
|
unsigned long pte = 0;
|
|
|
|
/* pde & 0x80 tests the 4MB page bit. We don't support 4MB
|
|
page tables, for now. */
|
|
if ((pde & 1) && !(pde & 0x80) && n >= 0 && n < 1024)
|
|
{
|
|
pde &= ~0xfff; /* Clear non-address bits. */
|
|
pte = _farpeekl (_dos_ds, pde + 4*n);
|
|
}
|
|
return pte;
|
|
}
|
|
|
|
/* Display a Page Directory or Page Table entry. IS_DIR, if non-zero,
|
|
says this is a Page Directory entry. If FORCE is non-zero, display
|
|
the entry even if its Present flag is off. OFF is the offset of the
|
|
address from the page's base address. */
|
|
static void
|
|
display_ptable_entry (unsigned long entry, int is_dir, int force, unsigned off)
|
|
{
|
|
if ((entry & 1) != 0)
|
|
{
|
|
printf_filtered ("Base=0x%05lx000", entry >> 12);
|
|
if ((entry & 0x100) && !is_dir)
|
|
puts_filtered (" Global");
|
|
if ((entry & 0x40) && !is_dir)
|
|
puts_filtered (" Dirty");
|
|
printf_filtered (" %sAcc.", (entry & 0x20) ? "" : "Not-");
|
|
printf_filtered (" %sCached", (entry & 0x10) ? "" : "Not-");
|
|
printf_filtered (" Write-%s", (entry & 8) ? "Thru" : "Back");
|
|
printf_filtered (" %s", (entry & 4) ? "Usr" : "Sup");
|
|
printf_filtered (" Read-%s", (entry & 2) ? "Write" : "Only");
|
|
if (off)
|
|
printf_filtered (" +0x%x", off);
|
|
puts_filtered ("\n");
|
|
}
|
|
else if (force)
|
|
printf_filtered ("Page%s not present or not supported; value=0x%lx.\n",
|
|
is_dir ? " Table" : "", entry >> 1);
|
|
}
|
|
|
|
static void
|
|
go32_pde (const char *arg, int from_tty)
|
|
{
|
|
long pde_idx = -1, i;
|
|
|
|
if (arg && *arg)
|
|
{
|
|
arg = skip_spaces (arg);
|
|
|
|
if (*arg)
|
|
{
|
|
pde_idx = parse_and_eval_long (arg);
|
|
if (pde_idx < 0 || pde_idx >= 1024)
|
|
error (_("Entry %ld is outside valid limits [0..1023]."), pde_idx);
|
|
}
|
|
}
|
|
|
|
pdbr = get_cr3 ();
|
|
if (!pdbr)
|
|
puts_filtered ("Access to Page Directories is "
|
|
"not supported on this system.\n");
|
|
else if (pde_idx >= 0)
|
|
display_ptable_entry (get_pde (pde_idx), 1, 1, 0);
|
|
else
|
|
for (i = 0; i < 1024; i++)
|
|
display_ptable_entry (get_pde (i), 1, 0, 0);
|
|
}
|
|
|
|
/* A helper function to display entries in a Page Table pointed to by
|
|
the N'th entry in the Page Directory. If FORCE is non-zero, say
|
|
something even if the Page Table is not accessible. */
|
|
static void
|
|
display_page_table (long n, int force)
|
|
{
|
|
unsigned long pde = get_pde (n);
|
|
|
|
if ((pde & 1) != 0)
|
|
{
|
|
int i;
|
|
|
|
printf_filtered ("Page Table pointed to by "
|
|
"Page Directory entry 0x%lx:\n", n);
|
|
for (i = 0; i < 1024; i++)
|
|
display_ptable_entry (get_pte (pde, i), 0, 0, 0);
|
|
puts_filtered ("\n");
|
|
}
|
|
else if (force)
|
|
printf_filtered ("Page Table not present; value=0x%lx.\n", pde >> 1);
|
|
}
|
|
|
|
static void
|
|
go32_pte (const char *arg, int from_tty)
|
|
{
|
|
long pde_idx = -1L, i;
|
|
|
|
if (arg && *arg)
|
|
{
|
|
arg = skip_spaces (arg);
|
|
|
|
if (*arg)
|
|
{
|
|
pde_idx = parse_and_eval_long (arg);
|
|
if (pde_idx < 0 || pde_idx >= 1024)
|
|
error (_("Entry %ld is outside valid limits [0..1023]."), pde_idx);
|
|
}
|
|
}
|
|
|
|
pdbr = get_cr3 ();
|
|
if (!pdbr)
|
|
puts_filtered ("Access to Page Tables is not supported on this system.\n");
|
|
else if (pde_idx >= 0)
|
|
display_page_table (pde_idx, 1);
|
|
else
|
|
for (i = 0; i < 1024; i++)
|
|
display_page_table (i, 0);
|
|
}
|
|
|
|
static void
|
|
go32_pte_for_address (const char *arg, int from_tty)
|
|
{
|
|
CORE_ADDR addr = 0, i;
|
|
|
|
if (arg && *arg)
|
|
{
|
|
arg = skip_spaces (arg);
|
|
|
|
if (*arg)
|
|
addr = parse_and_eval_address (arg);
|
|
}
|
|
if (!addr)
|
|
error_no_arg (_("linear address"));
|
|
|
|
pdbr = get_cr3 ();
|
|
if (!pdbr)
|
|
puts_filtered ("Access to Page Tables is not supported on this system.\n");
|
|
else
|
|
{
|
|
int pde_idx = (addr >> 22) & 0x3ff;
|
|
int pte_idx = (addr >> 12) & 0x3ff;
|
|
unsigned offs = addr & 0xfff;
|
|
|
|
printf_filtered ("Page Table entry for address %s:\n",
|
|
hex_string(addr));
|
|
display_ptable_entry (get_pte (get_pde (pde_idx), pte_idx), 0, 1, offs);
|
|
}
|
|
}
|
|
|
|
static struct cmd_list_element *info_dos_cmdlist = NULL;
|
|
|
|
static void
|
|
go32_info_dos_command (const char *args, int from_tty)
|
|
{
|
|
help_list (info_dos_cmdlist, "info dos ", class_info, gdb_stdout);
|
|
}
|
|
|
|
void _initialize_go32_nat ();
|
|
void
|
|
_initialize_go32_nat ()
|
|
{
|
|
x86_dr_low.set_control = go32_set_dr7;
|
|
x86_dr_low.set_addr = go32_set_dr;
|
|
x86_dr_low.get_status = go32_get_dr6;
|
|
x86_dr_low.get_control = go32_get_dr7;
|
|
x86_dr_low.get_addr = go32_get_dr;
|
|
x86_set_debug_register_length (4);
|
|
|
|
add_inf_child_target (&the_go32_nat_target);
|
|
|
|
/* Initialize child's cwd as empty to be initialized when starting
|
|
the child. */
|
|
*child_cwd = 0;
|
|
|
|
/* Initialize child's command line storage. */
|
|
if (redir_debug_init (&child_cmd) == -1)
|
|
internal_error (__FILE__, __LINE__,
|
|
_("Cannot allocate redirection storage: "
|
|
"not enough memory.\n"));
|
|
|
|
/* We are always processing GCC-compiled programs. */
|
|
processing_gcc_compilation = 2;
|
|
|
|
add_prefix_cmd ("dos", class_info, go32_info_dos_command, _("\
|
|
Print information specific to DJGPP (aka MS-DOS) debugging."),
|
|
&info_dos_cmdlist, "info dos ", 0, &infolist);
|
|
|
|
add_cmd ("sysinfo", class_info, go32_sysinfo, _("\
|
|
Display information about the target system, including CPU, OS, DPMI, etc."),
|
|
&info_dos_cmdlist);
|
|
add_cmd ("ldt", class_info, go32_sldt, _("\
|
|
Display entries in the LDT (Local Descriptor Table).\n\
|
|
Entry number (an expression) as an argument means display only that entry."),
|
|
&info_dos_cmdlist);
|
|
add_cmd ("gdt", class_info, go32_sgdt, _("\
|
|
Display entries in the GDT (Global Descriptor Table).\n\
|
|
Entry number (an expression) as an argument means display only that entry."),
|
|
&info_dos_cmdlist);
|
|
add_cmd ("idt", class_info, go32_sidt, _("\
|
|
Display entries in the IDT (Interrupt Descriptor Table).\n\
|
|
Entry number (an expression) as an argument means display only that entry."),
|
|
&info_dos_cmdlist);
|
|
add_cmd ("pde", class_info, go32_pde, _("\
|
|
Display entries in the Page Directory.\n\
|
|
Entry number (an expression) as an argument means display only that entry."),
|
|
&info_dos_cmdlist);
|
|
add_cmd ("pte", class_info, go32_pte, _("\
|
|
Display entries in Page Tables.\n\
|
|
Entry number (an expression) as an argument means display only entries\n\
|
|
from the Page Table pointed to by the specified Page Directory entry."),
|
|
&info_dos_cmdlist);
|
|
add_cmd ("address-pte", class_info, go32_pte_for_address, _("\
|
|
Display a Page Table entry for a linear address.\n\
|
|
The address argument must be a linear address, after adding to\n\
|
|
it the base address of the appropriate segment.\n\
|
|
The base address of variables and functions in the debuggee's data\n\
|
|
or code segment is stored in the variable __djgpp_base_address,\n\
|
|
so use `__djgpp_base_address + (char *)&var' as the argument.\n\
|
|
For other segments, look up their base address in the output of\n\
|
|
the `info dos ldt' command."),
|
|
&info_dos_cmdlist);
|
|
}
|
|
|
|
pid_t
|
|
tcgetpgrp (int fd)
|
|
{
|
|
if (isatty (fd))
|
|
return SOME_PID;
|
|
errno = ENOTTY;
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
tcsetpgrp (int fd, pid_t pgid)
|
|
{
|
|
if (isatty (fd) && pgid == SOME_PID)
|
|
return 0;
|
|
errno = pgid == SOME_PID ? ENOTTY : ENOSYS;
|
|
return -1;
|
|
}
|