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870f88f755
gdb/ChangeLog: 2016-05-07 Trevor Saunders <tbsaunde+binutils@tbsaunde.org> * aarch64-linux-tdep.c (aarch64_linux_sigframe_init): Remove unused variables. * aarch64-tdep.c (aarch64_skip_prologue): Likewise. (aarch64_scan_prologue): Likewise. (aarch64_prologue_prev_register): Likewise. (aarch64_dwarf2_prev_register): Likewise. (pass_in_v): Likewise. (aarch64_push_dummy_call): Likewise. (aarch64_breakpoint_from_pc): Likewise. (aarch64_return_in_memory): Likewise. (aarch64_return_value): Likewise. (aarch64_displaced_step_b_cond): Likewise. (aarch64_displaced_step_cb): Likewise. (aarch64_displaced_step_tb): Likewise. (aarch64_gdbarch_init): Likewise. (aarch64_process_record): Likewise. * alpha-mdebug-tdep.c (alpha_mdebug_init_abi): Likewise. * alpha-tdep.c (_initialize_alpha_tdep): Likewise. * amd64-dicos-tdep.c (amd64_dicos_init_abi): Likewise. * amd64-linux-tdep.c (amd64_dtrace_parse_probe_argument): Likewise. * amd64-tdep.c (fixup_riprel): Likewise. * amd64-windows-tdep.c (amd64_windows_frame_decode_epilogue): Likewise. (amd64_windows_frame_decode_insns): Likewise. (amd64_windows_frame_cache): Likewise. (amd64_windows_frame_prev_register): Likewise. (amd64_windows_frame_this_id): Likewise. (amd64_windows_init_abi): Likewise. * arm-linux-tdep.c (arm_linux_get_syscall_number): Likewise. (arm_linux_get_next_pcs_syscall_next_pc): Likewise. * arm-symbian-tdep.c (arm_symbian_init_abi): Likewise. * arm-tdep.c (arm_make_epilogue_frame_cache): Likewise. (arm_epilogue_frame_prev_register): Likewise. (arm_record_vdata_transfer_insn): Likewise. (arm_record_exreg_ld_st_insn): Likewise. * auto-load.c (execute_script_contents): Likewise. (print_scripts): Likewise. * avr-tdep.c (avr_frame_prev_register): Likewise. (avr_push_dummy_call): Likewise. * bfin-linux-tdep.c (bfin_linux_sigframe_init): Likewise. * bfin-tdep.c (bfin_gdbarch_init): Likewise. * blockframe.c (find_pc_partial_function_gnu_ifunc): Likewise. * break-catch-throw.c (fetch_probe_arguments): Likewise. * breakpoint.c (breakpoint_xfer_memory): Likewise. (breakpoint_init_inferior): Likewise. (breakpoint_inserted_here_p): Likewise. (software_breakpoint_inserted_here_p): Likewise. (hardware_breakpoint_inserted_here_p): Likewise. (bpstat_what): Likewise. (break_range_command): Likewise. (save_breakpoints): Likewise. * coffread.c (coff_symfile_read): Likewise. * cris-tdep.c (cris_push_dummy_call): Likewise. (cris_scan_prologue): Likewise. (cris_register_size): Likewise. (_initialize_cris_tdep): Likewise. * d-exp.y: Likewise. * dbxread.c (dbx_read_symtab): Likewise. (process_one_symbol): Likewise. (coffstab_build_psymtabs): Likewise. (elfstab_build_psymtabs): Likewise. * dicos-tdep.c (dicos_init_abi): Likewise. * disasm.c (do_mixed_source_and_assembly): Likewise. (gdb_disassembly): Likewise. * dtrace-probe.c (dtrace_process_dof): Likewise. * dwarf2read.c (error_check_comp_unit_head): Likewise. (build_type_psymtabs_1): Likewise. (skip_one_die): Likewise. (process_imported_unit_die): Likewise. (dwarf2_physname): Likewise. (read_file_scope): Likewise. (setup_type_unit_groups): Likewise. (create_dwo_cu_reader): Likewise. (create_dwo_cu): Likewise. (create_dwo_unit_in_dwp_v1): Likewise. (create_dwo_unit_in_dwp_v2): Likewise. (lookup_dwo_unit_in_dwp): Likewise. (free_dwo_file): Likewise. (check_producer): Likewise. (dwarf2_add_typedef): Likewise. (dwarf2_add_member_fn): Likewise. (read_unsigned_leb128): Likewise. (read_signed_leb128): Likewise. (dwarf2_const_value): Likewise. (follow_die_sig_1): Likewise. (dwarf_decode_macro_bytes): Likewise. * extension.c (restore_active_ext_lang): Likewise. * frv-linux-tdep.c (frv_linux_sigtramp_frame_cache): Likewise. * ft32-tdep.c (ft32_analyze_prologue): Likewise. * gdbtypes.c (lookup_typename): Likewise. (resolve_dynamic_range): Likewise. (check_typedef): Likewise. * h8300-tdep.c (h8300_is_argument_spill): Likewise. (h8300_gdbarch_init): Likewise. * hppa-tdep.c (hppa32_push_dummy_call): Likewise. (hppa_frame_this_id): Likewise. (_initialize_hppa_tdep): Likewise. * hppanbsd-tdep.c (hppanbsd_sigtramp_cache_init): Likewise. * hppaobsd-tdep.c (hppaobsd_supply_fpregset): Likewise. * i386-dicos-tdep.c (i386_dicos_init_abi): Likewise. * i386-tdep.c (i386_bnd_type): Likewise. (i386_gdbarch_init): Likewise. (i386_mpx_bd_base): Likewise. * i386nbsd-tdep.c (i386nbsd_sigtramp_cache_init): Likewise. * i386obsd-tdep.c (i386obsd_elf_init_abi): Likewise. * ia64-tdep.c (examine_prologue): Likewise. (ia64_frame_cache): Likewise. (ia64_push_dummy_call): Likewise. * infcmd.c (finish_command_fsm_async_reply_reason): Likewise. (default_print_one_register_info): Likewise. * infrun.c (infrun_thread_ptid_changed): Likewise. (thread_still_needs_step_over): Likewise. (stop_all_threads): Likewise. (restart_threads): Likewise. (keep_going_stepped_thread): Likewise. * iq2000-tdep.c (iq2000_scan_prologue): Likewise. * language.c (language_init_primitive_type_symbols): Likewise. * linespec.c (add_sal_to_sals): Likewise. * linux-nat.c (status_callback): Likewise. (kill_unfollowed_fork_children): Likewise. (linux_nat_kill): Likewise. * linux-tdep.c (linux_fill_prpsinfo): Likewise. * linux-thread-db.c (thread_db_notice_clone): Likewise. (record_thread): Likewise. * location.c (string_to_event_location_basic): Likewise. * m32c-tdep.c (m32c_prev_register): Likewise. * m32r-linux-tdep.c (m32r_linux_init_abi): Likewise. * m32r-tdep.c (decode_prologue): Likewise. * m68klinux-tdep.c (m68k_linux_sigtramp_frame_cache): Likewise. * machoread.c (macho_symtab_read): Likewise. (macho_symfile_read): Likewise. (macho_symfile_offsets): Likewise. * maint.c (set_per_command_cmd): Likewise. * mi/mi-cmd-stack.c (mi_cmd_stack_list_locals): Likewise. (mi_cmd_stack_list_variables): Likewise. * mi/mi-main.c (mi_cmd_exec_run): Likewise. (output_register): Likewise. (mi_cmd_execute): Likewise. (mi_cmd_trace_define_variable): Likewise. (print_variable_or_computed): Likewise. * minsyms.c (prim_record_minimal_symbol_full): Likewise. * mn10300-tdep.c (mn10300_frame_prev_register): Likewise. * msp430-tdep.c (msp430_pseudo_register_write): Likewise. * mt-tdep.c (mt_registers_info): Likewise. * nios2-tdep.c (nios2_analyze_prologue): Likewise. (nios2_push_dummy_call): Likewise. (nios2_frame_unwind_cache): Likewise. (nios2_stub_frame_cache): Likewise. (nios2_stub_frame_sniffer): Likewise. (nios2_gdbarch_init): Likewise. * ppc-ravenscar-thread.c: Likewise. * ppcfbsd-tdep.c (ppcfbsd_sigtramp_frame_cache): Likewise. * python/py-evts.c (add_new_registry): Likewise. * python/py-finishbreakpoint.c (bpfinishpy_init): Likewise. (bpfinishpy_detect_out_scope_cb): Likewise. * python/py-framefilter.c (py_print_value): Likewise. * python/py-inferior.c (infpy_write_memory): Likewise. * python/py-infevents.c (create_inferior_call_event_object): Likewise. * python/py-infthread.c (thpy_get_ptid): Likewise. * python/py-linetable.c (ltpy_get_pcs_for_line): Likewise. (ltpy_get_all_source_lines): Likewise. (ltpy_is_valid): Likewise. (ltpy_iternext): Likewise. * python/py-symtab.c (symtab_and_line_to_sal_object): Likewise. * python/py-unwind.c (pyuw_object_attribute_to_pointer): Likewise. (unwind_infopy_str): Likewise. * python/py-varobj.c (py_varobj_get_iterator): Likewise. * ravenscar-thread.c (ravenscar_inferior_created): Likewise. * rs6000-aix-tdep.c (rs6000_push_dummy_call): Likewise. * rs6000-lynx178-tdep.c (rs6000_lynx178_push_dummy_call): Likewise. * rs6000-tdep.c (ppc_deal_with_atomic_sequence): Likewise. * s390-linux-tdep.c (s390_supply_tdb_regset): Likewise. (s390_frame_prev_register): Likewise. (s390_dwarf2_frame_init_reg): Likewise. (s390_record_vr): Likewise. (s390_process_record): Likewise. * score-tdep.c (score_push_dummy_call): Likewise. (score3_analyze_prologue): Likewise. * sh-tdep.c (sh_extract_return_value_nofpu): Likewise. * sh64-tdep.c (sh64_analyze_prologue): Likewise. (sh64_push_dummy_call): Likewise. (sh64_extract_return_value): Likewise. (sh64_do_fp_register): Likewise. * solib-aix.c (solib_aix_get_section_offsets): Likewise. * solib-darwin.c (darwin_read_exec_load_addr_from_dyld): Likewise. (darwin_solib_read_all_image_info_addr): Likewise. * solib-dsbt.c (enable_break): Likewise. * solib-frv.c (enable_break2): Likewise. (frv_fdpic_find_canonical_descriptor): Likewise. * solib-svr4.c (svr4_handle_solib_event): Likewise. * sparc-tdep.c (sparc_skip_stack_check): Likewise. * sparc64-linux-tdep.c (sparc64_linux_get_longjmp_target): Likewise. * sparcobsd-tdep.c (sparc32obsd_init_abi): Likewise. * spu-tdep.c (info_spu_dma_cmdlist): Likewise. * stack.c (read_frame_local): Likewise. * symfile.c (symbol_file_add_separate): Likewise. (remove_symbol_file_command): Likewise. * symmisc.c (maintenance_print_one_line_table): Likewise. * symtab.c (symbol_cache_flush): Likewise. (basic_lookup_transparent_type): Likewise. (sort_search_symbols_remove_dups): Likewise. * target.c (target_memory_map): Likewise. (target_detach): Likewise. (target_resume): Likewise. (acquire_fileio_fd): Likewise. (target_store_registers): Likewise. * thread.c (print_thread_info_1): Likewise. * tic6x-tdep.c (tic6x_analyze_prologue): Likewise. * tilegx-linux-tdep.c (tilegx_linux_sigframe_init): Likewise. * tilegx-tdep.c (tilegx_push_dummy_call): Likewise. (tilegx_analyze_prologue): Likewise. (tilegx_stack_frame_destroyed_p): Likewise. (tilegx_frame_cache): Likewise. * tracefile.c (trace_save): Likewise. * tracepoint.c (encode_actions_and_make_cleanup): Likewise. (start_tracing): Likewise. (print_one_static_tracepoint_marker): Likewise. * tui/tui.c (tui_enable): Likewise. * valops.c (value_struct_elt_bitpos): Likewise. (find_overload_match): Likewise. (find_oload_champ): Likewise. * value.c (value_contents_copy_raw): Likewise. * windows-tdep.c (windows_get_tlb_type): Likewise. * x86-linux-nat.c (x86_linux_enable_btrace): Likewise. * xcoffread.c (record_minimal_symbol): Likewise. (scan_xcoff_symtab): Likewise. * xtensa-tdep.c (execute_code): Likewise. (xtensa_gdbarch_init): Likewise. (_initialize_xtensa_tdep): Likewise.
498 lines
14 KiB
C
498 lines
14 KiB
C
/* Target-dependent code for GNU/Linux running on the Fujitsu FR-V,
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for GDB.
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Copyright (C) 2004-2016 Free Software Foundation, Inc.
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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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#include "defs.h"
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#include "gdbcore.h"
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#include "target.h"
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#include "frame.h"
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#include "osabi.h"
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#include "regcache.h"
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#include "elf-bfd.h"
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#include "elf/frv.h"
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#include "frv-tdep.h"
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#include "trad-frame.h"
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#include "frame-unwind.h"
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#include "regset.h"
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#include "linux-tdep.h"
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/* Define the size (in bytes) of an FR-V instruction. */
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static const int frv_instr_size = 4;
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enum {
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NORMAL_SIGTRAMP = 1,
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RT_SIGTRAMP = 2
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};
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static int
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frv_linux_pc_in_sigtramp (struct gdbarch *gdbarch, CORE_ADDR pc,
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const char *name)
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{
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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gdb_byte buf[frv_instr_size];
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LONGEST instr;
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int retval = 0;
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if (target_read_memory (pc, buf, sizeof buf) != 0)
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return 0;
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instr = extract_unsigned_integer (buf, sizeof buf, byte_order);
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if (instr == 0x8efc0077) /* setlos #__NR_sigreturn, gr7 */
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retval = NORMAL_SIGTRAMP;
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else if (instr == 0x8efc00ad) /* setlos #__NR_rt_sigreturn, gr7 */
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retval = RT_SIGTRAMP;
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else
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return 0;
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if (target_read_memory (pc + frv_instr_size, buf, sizeof buf) != 0)
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return 0;
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instr = extract_unsigned_integer (buf, sizeof buf, byte_order);
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if (instr != 0xc0700000) /* tira gr0, 0 */
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return 0;
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/* If we get this far, we'll return a non-zero value, either
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NORMAL_SIGTRAMP (1) or RT_SIGTRAMP (2). */
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return retval;
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}
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/* Given NEXT_FRAME, the "callee" frame of the sigtramp frame that we
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wish to decode, and REGNO, one of the frv register numbers defined
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in frv-tdep.h, return the address of the saved register (corresponding
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to REGNO) in the sigtramp frame. Return -1 if the register is not
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found in the sigtramp frame. The magic numbers in the code below
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were computed by examining the following kernel structs:
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From arch/frv/kernel/signal.c:
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struct sigframe
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{
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void (*pretcode)(void);
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int sig;
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struct sigcontext sc;
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unsigned long extramask[_NSIG_WORDS-1];
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uint32_t retcode[2];
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};
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struct rt_sigframe
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{
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void (*pretcode)(void);
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int sig;
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struct siginfo *pinfo;
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void *puc;
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struct siginfo info;
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struct ucontext uc;
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uint32_t retcode[2];
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};
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From include/asm-frv/ucontext.h:
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struct ucontext {
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unsigned long uc_flags;
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struct ucontext *uc_link;
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stack_t uc_stack;
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struct sigcontext uc_mcontext;
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sigset_t uc_sigmask;
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};
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From include/asm-frv/signal.h:
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typedef struct sigaltstack {
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void *ss_sp;
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int ss_flags;
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size_t ss_size;
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} stack_t;
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From include/asm-frv/sigcontext.h:
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struct sigcontext {
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struct user_context sc_context;
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unsigned long sc_oldmask;
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} __attribute__((aligned(8)));
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From include/asm-frv/registers.h:
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struct user_int_regs
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{
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unsigned long psr;
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unsigned long isr;
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unsigned long ccr;
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unsigned long cccr;
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unsigned long lr;
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unsigned long lcr;
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unsigned long pc;
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unsigned long __status;
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unsigned long syscallno;
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unsigned long orig_gr8;
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unsigned long gner[2];
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unsigned long long iacc[1];
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union {
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unsigned long tbr;
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unsigned long gr[64];
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};
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};
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struct user_fpmedia_regs
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{
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unsigned long fr[64];
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unsigned long fner[2];
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unsigned long msr[2];
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unsigned long acc[8];
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unsigned char accg[8];
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unsigned long fsr[1];
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};
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struct user_context
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{
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struct user_int_regs i;
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struct user_fpmedia_regs f;
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void *extension;
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} __attribute__((aligned(8))); */
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static LONGEST
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frv_linux_sigcontext_reg_addr (struct frame_info *this_frame, int regno,
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CORE_ADDR *sc_addr_cache_ptr)
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{
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struct gdbarch *gdbarch = get_frame_arch (this_frame);
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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CORE_ADDR sc_addr;
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if (sc_addr_cache_ptr && *sc_addr_cache_ptr)
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{
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sc_addr = *sc_addr_cache_ptr;
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}
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else
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{
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CORE_ADDR pc, sp;
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gdb_byte buf[4];
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int tramp_type;
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pc = get_frame_pc (this_frame);
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tramp_type = frv_linux_pc_in_sigtramp (gdbarch, pc, 0);
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get_frame_register (this_frame, sp_regnum, buf);
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sp = extract_unsigned_integer (buf, sizeof buf, byte_order);
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if (tramp_type == NORMAL_SIGTRAMP)
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{
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/* For a normal sigtramp frame, the sigcontext struct starts
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at SP + 8. */
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sc_addr = sp + 8;
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}
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else if (tramp_type == RT_SIGTRAMP)
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{
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/* For a realtime sigtramp frame, SP + 12 contains a pointer
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to a ucontext struct. The ucontext struct contains a
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sigcontext struct starting 24 bytes in. (The offset of
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uc_mcontext within struct ucontext is derived as follows:
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stack_t is a 12-byte struct and struct sigcontext is
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8-byte aligned. This gives an offset of 8 + 12 + 4 (for
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padding) = 24.) */
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if (target_read_memory (sp + 12, buf, sizeof buf) != 0)
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{
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warning (_("Can't read realtime sigtramp frame."));
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return 0;
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}
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sc_addr = extract_unsigned_integer (buf, sizeof buf, byte_order);
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sc_addr += 24;
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}
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else
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internal_error (__FILE__, __LINE__, _("not a signal trampoline"));
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if (sc_addr_cache_ptr)
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*sc_addr_cache_ptr = sc_addr;
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}
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switch (regno)
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{
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case psr_regnum :
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return sc_addr + 0;
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/* sc_addr + 4 has "isr", the Integer Status Register. */
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case ccr_regnum :
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return sc_addr + 8;
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case cccr_regnum :
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return sc_addr + 12;
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case lr_regnum :
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return sc_addr + 16;
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case lcr_regnum :
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return sc_addr + 20;
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case pc_regnum :
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return sc_addr + 24;
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/* sc_addr + 28 is __status, the exception status.
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sc_addr + 32 is syscallno, the syscall number or -1.
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sc_addr + 36 is orig_gr8, the original syscall arg #1.
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sc_addr + 40 is gner[0].
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sc_addr + 44 is gner[1]. */
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case iacc0h_regnum :
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return sc_addr + 48;
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case iacc0l_regnum :
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return sc_addr + 52;
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default :
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if (first_gpr_regnum <= regno && regno <= last_gpr_regnum)
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return sc_addr + 56 + 4 * (regno - first_gpr_regnum);
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else if (first_fpr_regnum <= regno && regno <= last_fpr_regnum)
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return sc_addr + 312 + 4 * (regno - first_fpr_regnum);
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else
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return -1; /* not saved. */
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}
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}
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/* Signal trampolines. */
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static struct trad_frame_cache *
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frv_linux_sigtramp_frame_cache (struct frame_info *this_frame,
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void **this_cache)
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{
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struct gdbarch *gdbarch = get_frame_arch (this_frame);
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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struct trad_frame_cache *cache;
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CORE_ADDR addr;
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gdb_byte buf[4];
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int regnum;
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CORE_ADDR sc_addr_cache_val = 0;
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struct frame_id this_id;
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if (*this_cache)
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return (struct trad_frame_cache *) *this_cache;
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cache = trad_frame_cache_zalloc (this_frame);
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/* FIXME: cagney/2004-05-01: This is is long standing broken code.
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The frame ID's code address should be the start-address of the
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signal trampoline and not the current PC within that
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trampoline. */
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get_frame_register (this_frame, sp_regnum, buf);
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addr = extract_unsigned_integer (buf, sizeof buf, byte_order);
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this_id = frame_id_build (addr, get_frame_pc (this_frame));
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trad_frame_set_id (cache, this_id);
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for (regnum = 0; regnum < frv_num_regs; regnum++)
|
||
{
|
||
LONGEST reg_addr = frv_linux_sigcontext_reg_addr (this_frame, regnum,
|
||
&sc_addr_cache_val);
|
||
if (reg_addr != -1)
|
||
trad_frame_set_reg_addr (cache, regnum, reg_addr);
|
||
}
|
||
|
||
*this_cache = cache;
|
||
return cache;
|
||
}
|
||
|
||
static void
|
||
frv_linux_sigtramp_frame_this_id (struct frame_info *this_frame,
|
||
void **this_cache,
|
||
struct frame_id *this_id)
|
||
{
|
||
struct trad_frame_cache *cache
|
||
= frv_linux_sigtramp_frame_cache (this_frame, this_cache);
|
||
trad_frame_get_id (cache, this_id);
|
||
}
|
||
|
||
static struct value *
|
||
frv_linux_sigtramp_frame_prev_register (struct frame_info *this_frame,
|
||
void **this_cache, int regnum)
|
||
{
|
||
/* Make sure we've initialized the cache. */
|
||
struct trad_frame_cache *cache
|
||
= frv_linux_sigtramp_frame_cache (this_frame, this_cache);
|
||
return trad_frame_get_register (cache, this_frame, regnum);
|
||
}
|
||
|
||
static int
|
||
frv_linux_sigtramp_frame_sniffer (const struct frame_unwind *self,
|
||
struct frame_info *this_frame,
|
||
void **this_cache)
|
||
{
|
||
struct gdbarch *gdbarch = get_frame_arch (this_frame);
|
||
CORE_ADDR pc = get_frame_pc (this_frame);
|
||
const char *name;
|
||
|
||
find_pc_partial_function (pc, &name, NULL, NULL);
|
||
if (frv_linux_pc_in_sigtramp (gdbarch, pc, name))
|
||
return 1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static const struct frame_unwind frv_linux_sigtramp_frame_unwind =
|
||
{
|
||
SIGTRAMP_FRAME,
|
||
default_frame_unwind_stop_reason,
|
||
frv_linux_sigtramp_frame_this_id,
|
||
frv_linux_sigtramp_frame_prev_register,
|
||
NULL,
|
||
frv_linux_sigtramp_frame_sniffer
|
||
};
|
||
|
||
/* The FRV kernel defines ELF_NGREG as 46. We add 2 in order to include
|
||
the loadmap addresses in the register set. (See below for more info.) */
|
||
#define FRV_ELF_NGREG (46 + 2)
|
||
typedef unsigned char frv_elf_greg_t[4];
|
||
typedef struct { frv_elf_greg_t reg[FRV_ELF_NGREG]; } frv_elf_gregset_t;
|
||
|
||
typedef unsigned char frv_elf_fpreg_t[4];
|
||
typedef struct
|
||
{
|
||
frv_elf_fpreg_t fr[64];
|
||
frv_elf_fpreg_t fner[2];
|
||
frv_elf_fpreg_t msr[2];
|
||
frv_elf_fpreg_t acc[8];
|
||
unsigned char accg[8];
|
||
frv_elf_fpreg_t fsr[1];
|
||
} frv_elf_fpregset_t;
|
||
|
||
/* Register maps. */
|
||
|
||
static const struct regcache_map_entry frv_linux_gregmap[] =
|
||
{
|
||
{ 1, psr_regnum, 4 },
|
||
{ 1, REGCACHE_MAP_SKIP, 4 }, /* isr */
|
||
{ 1, ccr_regnum, 4 },
|
||
{ 1, cccr_regnum, 4 },
|
||
{ 1, lr_regnum, 4 },
|
||
{ 1, lcr_regnum, 4 },
|
||
{ 1, pc_regnum, 4 },
|
||
{ 1, REGCACHE_MAP_SKIP, 4 }, /* __status */
|
||
{ 1, REGCACHE_MAP_SKIP, 4 }, /* syscallno */
|
||
{ 1, REGCACHE_MAP_SKIP, 4 }, /* orig_gr8 */
|
||
{ 1, gner0_regnum, 4 },
|
||
{ 1, gner1_regnum, 4 },
|
||
{ 1, REGCACHE_MAP_SKIP, 8 }, /* iacc0 */
|
||
{ 1, tbr_regnum, 4 },
|
||
{ 31, first_gpr_regnum + 1, 4 }, /* gr1 ... gr31 */
|
||
|
||
/* Technically, the loadmap addresses are not part of `pr_reg' as
|
||
found in the elf_prstatus struct. The fields which communicate
|
||
the loadmap address appear (by design) immediately after
|
||
`pr_reg' though, and the BFD function elf32_frv_grok_prstatus()
|
||
has been implemented to include these fields in the register
|
||
section that it extracts from the core file. So, for our
|
||
purposes, they may be viewed as registers. */
|
||
|
||
{ 1, fdpic_loadmap_exec_regnum, 4 },
|
||
{ 1, fdpic_loadmap_interp_regnum, 4 },
|
||
{ 0 }
|
||
};
|
||
|
||
static const struct regcache_map_entry frv_linux_fpregmap[] =
|
||
{
|
||
{ 64, first_fpr_regnum, 4 }, /* fr0 ... fr63 */
|
||
{ 1, fner0_regnum, 4 },
|
||
{ 1, fner1_regnum, 4 },
|
||
{ 1, msr0_regnum, 4 },
|
||
{ 1, msr1_regnum, 4 },
|
||
{ 8, acc0_regnum, 4 }, /* acc0 ... acc7 */
|
||
{ 1, accg0123_regnum, 4 },
|
||
{ 1, accg4567_regnum, 4 },
|
||
{ 1, fsr0_regnum, 4 },
|
||
{ 0 }
|
||
};
|
||
|
||
/* Unpack an frv_elf_gregset_t into GDB's register cache. */
|
||
|
||
static void
|
||
frv_linux_supply_gregset (const struct regset *regset,
|
||
struct regcache *regcache,
|
||
int regnum, const void *gregs, size_t len)
|
||
{
|
||
int regi;
|
||
char zerobuf[MAX_REGISTER_SIZE];
|
||
|
||
memset (zerobuf, 0, MAX_REGISTER_SIZE);
|
||
|
||
/* gr0 always contains 0. Also, the kernel passes the TBR value in
|
||
this slot. */
|
||
regcache_raw_supply (regcache, first_gpr_regnum, zerobuf);
|
||
|
||
/* Fill gr32, ..., gr63 with zeros. */
|
||
for (regi = first_gpr_regnum + 32; regi <= last_gpr_regnum; regi++)
|
||
regcache_raw_supply (regcache, regi, zerobuf);
|
||
|
||
regcache_supply_regset (regset, regcache, regnum, gregs, len);
|
||
}
|
||
|
||
/* FRV Linux kernel register sets. */
|
||
|
||
static const struct regset frv_linux_gregset =
|
||
{
|
||
frv_linux_gregmap,
|
||
frv_linux_supply_gregset, regcache_collect_regset
|
||
};
|
||
|
||
static const struct regset frv_linux_fpregset =
|
||
{
|
||
frv_linux_fpregmap,
|
||
regcache_supply_regset, regcache_collect_regset
|
||
};
|
||
|
||
static void
|
||
frv_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
|
||
iterate_over_regset_sections_cb *cb,
|
||
void *cb_data,
|
||
const struct regcache *regcache)
|
||
{
|
||
cb (".reg", sizeof (frv_elf_gregset_t), &frv_linux_gregset,
|
||
NULL, cb_data);
|
||
cb (".reg2", sizeof (frv_elf_fpregset_t), &frv_linux_fpregset,
|
||
NULL, cb_data);
|
||
}
|
||
|
||
|
||
static void
|
||
frv_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
|
||
{
|
||
linux_init_abi (info, gdbarch);
|
||
|
||
/* Set the sigtramp frame sniffer. */
|
||
frame_unwind_append_unwinder (gdbarch, &frv_linux_sigtramp_frame_unwind);
|
||
|
||
set_gdbarch_iterate_over_regset_sections
|
||
(gdbarch, frv_linux_iterate_over_regset_sections);
|
||
}
|
||
|
||
static enum gdb_osabi
|
||
frv_linux_elf_osabi_sniffer (bfd *abfd)
|
||
{
|
||
int elf_flags;
|
||
|
||
elf_flags = elf_elfheader (abfd)->e_flags;
|
||
|
||
/* Assume GNU/Linux if using the FDPIC ABI. If/when another OS shows
|
||
up that uses this ABI, we'll need to start using .note sections
|
||
or some such. */
|
||
if (elf_flags & EF_FRV_FDPIC)
|
||
return GDB_OSABI_LINUX;
|
||
else
|
||
return GDB_OSABI_UNKNOWN;
|
||
}
|
||
|
||
/* Provide a prototype to silence -Wmissing-prototypes. */
|
||
void _initialize_frv_linux_tdep (void);
|
||
|
||
void
|
||
_initialize_frv_linux_tdep (void)
|
||
{
|
||
gdbarch_register_osabi (bfd_arch_frv, 0, GDB_OSABI_LINUX,
|
||
frv_linux_init_abi);
|
||
gdbarch_register_osabi_sniffer (bfd_arch_frv,
|
||
bfd_target_elf_flavour,
|
||
frv_linux_elf_osabi_sniffer);
|
||
}
|