From 6617b94e06b1e2c288e85cc94de4c3c56964f86f Mon Sep 17 00:00:00 2001 From: John Gilmore Date: Sat, 5 Oct 1991 05:35:06 +0000 Subject: [PATCH] Intel 386 Mach host port. --- gdb/configure.in | 2 + gdb/mach386-xdep.c | 162 +++++++++++++++++++++++++++++++++++++++++++++++++++++ gdb/tm-i386v.h | 3 - gdb/xm-i386mach.h | 44 +++++++++++++++ gdb/xm-i386v.h | 2 + 5 files changed, 210 insertions(+), 3 deletions(-) create mode 100644 gdb/mach386-xdep.c create mode 100644 gdb/xm-i386mach.h diff --git a/gdb/configure.in b/gdb/configure.in index 9dfc1f2..2bf2d0f 100644 --- a/gdb/configure.in +++ b/gdb/configure.in @@ -78,6 +78,7 @@ i386) case "${host_os}" in sysv) gdb_host=i386v ;; sysv32) gdb_host=i386v32 ;; + mach) gdb_host=i386mach ;; esac ;; esac @@ -208,6 +209,7 @@ i386) case "${target_os}" in sysv) gdb_target=i386v ;; sysv32) gdb_target=i386v32 ;; + mach) gdb_target=i386mach ;; esac esac ;; diff --git a/gdb/mach386-xdep.c b/gdb/mach386-xdep.c new file mode 100644 index 0000000..358bb17 --- /dev/null +++ b/gdb/mach386-xdep.c @@ -0,0 +1,162 @@ +/* Machine-dependent code for host Mach 386's for GDB, the GNU debugger. + Copyright (C) 1986, 1987, 1989, 1991 Free Software Foundation, Inc. + +This file is part of GDB. + +GDB 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 1, or (at your option) +any later version. + +GDB 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 GDB; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#if defined (GDB_TARGET_IS_MACH386) + +#include +#include "defs.h" +#include "param.h" +#include "frame.h" +#include "inferior.h" +#include "signame.h" +#include "gdbcore.h" + +#include +#include +#include +#include +#include +#include + +#include +#include + +#include +#include +#include + +void +fetch_inferior_registers () +{ + struct regs inferior_registers; + struct fp_state inferior_fp_registers; + extern char registers[]; + + registers_fetched (); + + ptrace (PTRACE_GETREGS, inferior_pid, &inferior_registers); + ptrace (PTRACE_GETFPREGS, inferior_pid, &inferior_fp_registers); + + bcopy (&inferior_registers, registers, sizeof inferior_registers); + + bcopy (inferior_fp_registers.f_st,®isters[REGISTER_BYTE (FP0_REGNUM)], + sizeof inferior_fp_registers.f_st); + bcopy (&inferior_fp_registers.f_ctrl, + ®isters[REGISTER_BYTE (FPC_REGNUM)], + 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). */ + +store_inferior_registers (regno) + int regno; +{ + struct regs inferior_registers; + struct fp_state inferior_fp_registers; + extern char registers[]; + + bcopy (registers, &inferior_registers, 20 * 4); + + bcopy (®isters[REGISTER_BYTE (FP0_REGNUM)],inferior_fp_registers.f_st, + sizeof inferior_fp_registers.f_st); + bcopy (®isters[REGISTER_BYTE (FPC_REGNUM)], + &inferior_fp_registers.f_ctrl, + 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, stack); + int reg = inferior_registers.r_reg[EAX]; + inferior_registers.r_reg[EAX] = + inferior_registers.r_reg[FP_REGNUM]; + ptrace (PTRACE_SETREGS, inferior_pid, &inferior_registers); + ptrace (PTRACE_POKEDATA, inferior_pid, stack, 0xc589); + ptrace (PTRACE_SINGLESTEP, inferior_pid, stack, 0); + wait (0); + ptrace (PTRACE_POKEDATA, inferior_pid, stack, stuff); + inferior_registers.r_reg[EAX] = reg; + } +#endif + ptrace (PTRACE_SETREGS, inferior_pid, &inferior_registers); + ptrace (PTRACE_SETFPREGS, inferior_pid, &inferior_fp_registers); +} + +/* Machine-dependent code which would otherwise be in core.c */ +/* Work with core files, for GDB. */ + + +void +fetch_core_registers (core_reg_sect, core_reg_size, which) + char *core_reg_sect; + unsigned core_reg_size; + int which; +{ + int val; + extern char registers[]; + + switch (which) { + case 0: + case 1: + bcopy (core_reg_sect, registers, core_reg_size); + break; + + case 2: + bcopy (core_reg_sect, + ®isters[REGISTER_BYTE (FP0_REGNUM)], + core_reg_size); /* FIXME, probably bogus */ +#if 0 + bcopy (&corestr.c_fpu.f_fpstatus.f_ctrl, + ®isters[REGISTER_BYTE (FPC_REGNUM)], + sizeof corestr.c_fpu.f_fpstatus - + sizeof corestr.c_fpu.f_fpstatus.f_st); +#endif + break; + } +} +#else /* Not mach386 target. */ + +/* These functions shouldn't be called when we're cross-debugging. */ + +void +fetch_inferior_registers () +{ +} + +/* ARGSUSED */ +store_inferior_registers (regno) + int regno; +{ +} + +/* ARGSUSED */ +void +fetch_core_registers (core_reg_sect, core_reg_size, which) + char *core_reg_sect; + unsigned core_reg_size; + int which; +{ +} + +#endif /* Not mach386 target. */ diff --git a/gdb/tm-i386v.h b/gdb/tm-i386v.h index f6f737d..03315bc 100644 --- a/gdb/tm-i386v.h +++ b/gdb/tm-i386v.h @@ -139,9 +139,6 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #define PC_REGNUM 8 #define PS_REGNUM 9 -#define REGISTER_U_ADDR(addr, blockend, regno) \ - (addr) = i386_register_u_addr ((blockend),(regno)); - /* Total amount of space needed to store our copies of the machine's register state, the array `registers'. */ #define REGISTER_BYTES (NUM_REGS * 4) diff --git a/gdb/xm-i386mach.h b/gdb/xm-i386mach.h new file mode 100644 index 0000000..244361b --- /dev/null +++ b/gdb/xm-i386mach.h @@ -0,0 +1,44 @@ +/* Definitions to make GDB run on Mach on an Intel 386 + Copyright (C) 1986, 1987, 1989, 1991 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#define HOST_BYTE_ORDER LITTLE_ENDIAN + +/* Avoid "INT_MIN redefined" warnings -- by defining it here, exactly + the same as in the system file. */ +#undef INT_MIN +#define INT_MIN 0x80000000 + +/* Get rid of any system-imposed stack limit if possible. */ + +#define SET_STACK_LIMIT_HUGE + +/* This is the amount to subtract from u.u_ar0 + to get the offset in the core file of the register values. */ + +#define KERNEL_U_ADDR (0x80000000 - (UPAGES * NBPG)) + +#define BROKEN_LARGE_ALLOCA + +/* Do implement the attach and detach commands. */ +/* #define ATTACH_DETACH 1 */ + +/* Override copies of {fetch,store}_inferior_registers in infptrace.c. */ +#define FETCH_INFERIOR_REGISTERS + +#define PREPARE_TO_STORE() read_register_bytes (0, NULL, REGISTER_BYTES) diff --git a/gdb/xm-i386v.h b/gdb/xm-i386v.h index d6874ed..589d709 100644 --- a/gdb/xm-i386v.h +++ b/gdb/xm-i386v.h @@ -55,6 +55,8 @@ on those where it does, it occurs quite reliably. */ #define KERNEL_U_ADDR 0xe0000000 +#define REGISTER_U_ADDR(addr, blockend, regno) \ + (addr) = i386_register_u_addr ((blockend),(regno)); #if 0 /* Interface definitions for kernel debugger KDB. */ -- 2.7.4