| /* Native dependent code for Mach 386's for GDB, the GNU debugger. |
| Copyright (C) 1986, 1987, 1989, 1991, 1992 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include "defs.h" |
| #include "frame.h" |
| #include "inferior.h" |
| #include "gdbcore.h" |
| |
| #include <sys/param.h> |
| #include <sys/dir.h> |
| #include <sys/user.h> |
| #include <signal.h> |
| #include <sys/ioctl.h> |
| #include <fcntl.h> |
| |
| #include <sys/ptrace.h> |
| #include <machine/reg.h> |
| |
| #include <sys/file.h> |
| #include "gdb_stat.h" |
| #include <sys/core.h> |
| |
| static void fetch_core_registers PARAMS ((char *, unsigned, int, CORE_ADDR)); |
| |
| void |
| fetch_inferior_registers (regno) |
| int regno; /* Original value discarded */ |
| { |
| struct regs inferior_registers; |
| struct fp_state inferior_fp_registers; |
| |
| registers_fetched (); |
| |
| ptrace (PTRACE_GETREGS, inferior_pid, |
| (PTRACE_ARG3_TYPE) & inferior_registers); |
| ptrace (PTRACE_GETFPREGS, inferior_pid, |
| (PTRACE_ARG3_TYPE) & inferior_fp_registers); |
| |
| memcpy (registers, &inferior_registers, sizeof inferior_registers); |
| |
| memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], |
| inferior_fp_registers.f_st, |
| sizeof inferior_fp_registers.f_st); |
| memcpy (®isters[REGISTER_BYTE (FPC_REGNUM)], |
| &inferior_fp_registers.f_ctrl, |
| sizeof inferior_fp_registers - sizeof inferior_fp_registers.f_st); |
| } |
| |
| /* Store our register values back into the inferior. |
| If REGNO is -1, do this for all registers. |
| Otherwise, REGNO specifies which register (so we can save time). */ |
| |
| void |
| store_inferior_registers (regno) |
| int regno; |
| { |
| struct regs inferior_registers; |
| struct fp_state inferior_fp_registers; |
| |
| memcpy (&inferior_registers, registers, 20 * 4); |
| |
| memcpy (inferior_fp_registers.f_st, ®isters[REGISTER_BYTE (FP0_REGNUM)], |
| sizeof inferior_fp_registers.f_st); |
| memcpy (&inferior_fp_registers.f_ctrl, |
| ®isters[REGISTER_BYTE (FPC_REGNUM)], |
| sizeof inferior_fp_registers - sizeof inferior_fp_registers.f_st); |
| |
| #ifdef PTRACE_FP_BUG |
| if (regno == FP_REGNUM || regno == -1) |
| /* Storing the frame pointer requires a gross hack, in which an |
| instruction that moves eax into ebp gets single-stepped. */ |
| { |
| int stack = inferior_registers.r_reg[SP_REGNUM]; |
| int stuff = ptrace (PTRACE_PEEKDATA, inferior_pid, |
| (PTRACE_ARG3_TYPE) stack); |
| int reg = inferior_registers.r_reg[EAX]; |
| inferior_registers.r_reg[EAX] = |
| inferior_registers.r_reg[FP_REGNUM]; |
| ptrace (PTRACE_SETREGS, inferior_pid, |
| (PTRACE_ARG3_TYPE) & inferior_registers); |
| ptrace (PTRACE_POKEDATA, inferior_pid, (PTRACE_ARG3_TYPE) stack, 0xc589); |
| ptrace (PTRACE_SINGLESTEP, inferior_pid, (PTRACE_ARG3_TYPE) stack, 0); |
| wait (0); |
| ptrace (PTRACE_POKEDATA, inferior_pid, (PTRACE_ARG3_TYPE) stack, stuff); |
| inferior_registers.r_reg[EAX] = reg; |
| } |
| #endif |
| ptrace (PTRACE_SETREGS, inferior_pid, |
| (PTRACE_ARG3_TYPE) & inferior_registers); |
| ptrace (PTRACE_SETFPREGS, inferior_pid, |
| (PTRACE_ARG3_TYPE) & inferior_fp_registers); |
| } |
| |
| |
| |
| /* Work with core files, for GDB. */ |
| |
| static void |
| fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr) |
| char *core_reg_sect; |
| unsigned core_reg_size; |
| int which; |
| CORE_ADDR reg_addr; /* Unused in this version */ |
| { |
| int val; |
| |
| switch (which) |
| { |
| case 0: |
| case 1: |
| memcpy (registers, core_reg_sect, core_reg_size); |
| break; |
| |
| case 2: |
| memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], |
| core_reg_sect, |
| core_reg_size); /* FIXME, probably bogus */ |
| #ifdef FPC_REGNUM |
| memcpy (®isters[REGISTER_BYTE (FPC_REGNUM)], |
| &corestr.c_fpu.f_fpstatus.f_ctrl, |
| sizeof corestr.c_fpu.f_fpstatus - |
| sizeof corestr.c_fpu.f_fpstatus.f_st); |
| #endif |
| break; |
| } |
| } |
| |
| |
| /* Register that we are able to handle i386mach core file formats. |
| FIXME: is this really bfd_target_unknown_flavour? */ |
| |
| static struct core_fns i386mach_core_fns = |
| { |
| bfd_target_unknown_flavour, /* core_flavour */ |
| default_check_format, /* check_format */ |
| default_core_sniffer, /* core_sniffer */ |
| fetch_core_registers, /* core_read_registers */ |
| NULL /* next */ |
| }; |
| |
| void |
| _initialize_core_i386mach () |
| { |
| add_core_fns (&i386mach_core_fns); |
| } |