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Diffstat (limited to 'gdb/i386bsd-nat.c')
| -rw-r--r-- | gdb/i386bsd-nat.c | 400 |
1 files changed, 0 insertions, 400 deletions
diff --git a/gdb/i386bsd-nat.c b/gdb/i386bsd-nat.c deleted file mode 100644 index 5d3583041b6..00000000000 --- a/gdb/i386bsd-nat.c +++ /dev/null @@ -1,400 +0,0 @@ -/* Native-dependent code for modern i386 BSD's. - Copyright 2000, 2001, 2002 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 "inferior.h" -#include "regcache.h" - -#include "gdb_assert.h" -#include <signal.h> -#include <stddef.h> -#include <sys/types.h> -#include <sys/ptrace.h> -#include <machine/reg.h> -#include <machine/frame.h> - -#ifdef HAVE_SYS_PROCFS_H -#include <sys/procfs.h> -#endif - -#ifndef HAVE_GREGSET_T -typedef struct reg gregset_t; -#endif - -#ifndef HAVE_FPREGSET_T -typedef struct fpreg fpregset_t; -#endif - -#include "gregset.h" - - -/* In older BSD versions we cannot get at some of the segment - registers. FreeBSD for example didn't support the %fs and %gs - registers until the 3.0 release. We have autoconf checks for their - presence, and deal gracefully with their absence. */ - -/* Registers we shouldn't try to fetch. */ -#if !defined (CANNOT_FETCH_REGISTER) -#define CANNOT_FETCH_REGISTER(regno) cannot_fetch_register (regno) -#endif - -/* Registers we shouldn't try to store. */ -#if !defined (CANNOT_STORE_REGISTER) -#define CANNOT_STORE_REGISTER(regno) cannot_fetch_register (regno) -#endif - -/* Offset to the gregset_t location where REG is stored. */ -#define REG_OFFSET(reg) offsetof (gregset_t, reg) - -/* At reg_offset[REGNO] you'll find the offset to the gregset_t - location where the GDB register REGNO is stored. Unsupported - registers are marked with `-1'. */ -static int reg_offset[] = -{ - REG_OFFSET (r_eax), - REG_OFFSET (r_ecx), - REG_OFFSET (r_edx), - REG_OFFSET (r_ebx), - REG_OFFSET (r_esp), - REG_OFFSET (r_ebp), - REG_OFFSET (r_esi), - REG_OFFSET (r_edi), - REG_OFFSET (r_eip), - REG_OFFSET (r_eflags), - REG_OFFSET (r_cs), - REG_OFFSET (r_ss), - REG_OFFSET (r_ds), - REG_OFFSET (r_es), -#ifdef HAVE_STRUCT_REG_R_FS - REG_OFFSET (r_fs), -#else - -1, -#endif -#ifdef HAVE_STRUCT_REG_R_GS - REG_OFFSET (r_gs) -#else - -1 -#endif -}; - -#define REG_ADDR(regset, regno) ((char *) (regset) + reg_offset[regno]) - -/* Macro to determine if a register is fetched with PT_GETREGS. */ -#define GETREGS_SUPPLIES(regno) \ - ((0 <= (regno) && (regno) <= 15)) - -#ifdef HAVE_PT_GETXMMREGS -/* Set to 1 if the kernel supports PT_GETXMMREGS. Initialized to -1 - so that we try PT_GETXMMREGS the first time around. */ -static int have_ptrace_xmmregs = -1; -#endif - -/* Return nonzero if we shouldn't try to fetch register REGNO. */ - -static int -cannot_fetch_register (int regno) -{ - return (reg_offset[regno] == -1); -} - - -/* Transfering the registers between GDB, inferiors and core files. */ - -/* Fill GDB's register array with the general-purpose register values - in *GREGSETP. */ - -void -supply_gregset (gregset_t *gregsetp) -{ - int i; - - for (i = 0; i < NUM_GREGS; i++) - { - if (CANNOT_FETCH_REGISTER (i)) - supply_register (i, NULL); - else - supply_register (i, REG_ADDR (gregsetp, i)); - } -} - -/* Fill register REGNO (if it is a general-purpose register) in - *GREGSETPS with the value in GDB's register array. If REGNO is -1, - do this for all registers. */ - -void -fill_gregset (gregset_t *gregsetp, int regno) -{ - int i; - - for (i = 0; i < NUM_GREGS; i++) - if ((regno == -1 || regno == i) && ! CANNOT_STORE_REGISTER (i)) - regcache_collect (i, REG_ADDR (gregsetp, i)); -} - -#include "i387-nat.h" - -/* Fill GDB's register array with the floating-point register values - in *FPREGSETP. */ - -void -supply_fpregset (fpregset_t *fpregsetp) -{ - i387_supply_fsave ((char *) fpregsetp); -} - -/* Fill register REGNO (if it is a floating-point register) in - *FPREGSETP with the value in GDB's register array. If REGNO is -1, - do this for all registers. */ - -void -fill_fpregset (fpregset_t *fpregsetp, int regno) -{ - i387_fill_fsave ((char *) fpregsetp, regno); -} - -/* Fetch register REGNO from the inferior. If REGNO is -1, do this - for all registers (including the floating point registers). */ - -void -fetch_inferior_registers (int regno) -{ - - if (regno == -1 || GETREGS_SUPPLIES (regno)) - { - gregset_t gregs; - - if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) &gregs, 0) == -1) - perror_with_name ("Couldn't get registers"); - - supply_gregset (&gregs); - if (regno != -1) - return; - } - - if (regno == -1 || regno >= FP0_REGNUM) - { - fpregset_t fpregs; -#ifdef HAVE_PT_GETXMMREGS - char xmmregs[512]; - - if (have_ptrace_xmmregs != 0 && - ptrace(PT_GETXMMREGS, PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) xmmregs, 0) == 0) - { - have_ptrace_xmmregs = 1; - i387_supply_fxsave (xmmregs); - } - else - { - if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) - perror_with_name ("Couldn't get floating point status"); - - supply_fpregset (&fpregs); - } -#else - if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) - perror_with_name ("Couldn't get floating point status"); - - supply_fpregset (&fpregs); -#endif - } -} - -/* Store register REGNO back into the inferior. If REGNO is -1, do - this for all registers (including the floating point registers). */ - -void -store_inferior_registers (int regno) -{ - - if (regno == -1 || GETREGS_SUPPLIES (regno)) - { - gregset_t gregs; - - if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) &gregs, 0) == -1) - perror_with_name ("Couldn't get registers"); - - fill_gregset (&gregs, regno); - - if (ptrace (PT_SETREGS, PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) &gregs, 0) == -1) - perror_with_name ("Couldn't write registers"); - - if (regno != -1) - return; - } - - if (regno == -1 || regno >= FP0_REGNUM) - { - fpregset_t fpregs; -#ifdef HAVE_PT_GETXMMREGS - char xmmregs[512]; - - if (have_ptrace_xmmregs != 0 && - ptrace(PT_GETXMMREGS, PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) xmmregs, 0) == 0) - { - have_ptrace_xmmregs = 1; - - i387_fill_fxsave (xmmregs, regno); - - if (ptrace (PT_SETXMMREGS, PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) xmmregs, 0) == -1) - perror_with_name ("Couldn't write XMM registers"); - } - else - { - have_ptrace_xmmregs = 0; -#endif - if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) - perror_with_name ("Couldn't get floating point status"); - - fill_fpregset (&fpregs, regno); - - if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) - perror_with_name ("Couldn't write floating point status"); -#ifdef HAVE_PT_GETXMMREGS - } -#endif - } -} - - -/* Support for debug registers. */ - -#ifdef HAVE_PT_GETDBREGS - -/* Not all versions of FreeBSD/i386 that support the debug registers - have this macro. */ -#ifndef DBREG_DRX -#define DBREG_DRX(d, x) ((&d->dr0)[x]) -#endif - -static void -i386bsd_dr_set (int regnum, unsigned int value) -{ - struct dbreg dbregs; - - if (ptrace (PT_GETDBREGS, PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) &dbregs, 0) == -1) - perror_with_name ("Couldn't get debug registers"); - - /* For some mysterious reason, some of the reserved bits in the - debug control register get set. Mask these off, otherwise the - ptrace call below will fail. */ - dbregs.dr7 &= ~(0x0000fc00); - - DBREG_DRX ((&dbregs), regnum) = value; - - if (ptrace (PT_SETDBREGS, PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) &dbregs, 0) == -1) - perror_with_name ("Couldn't write debug registers"); -} - -void -i386bsd_dr_set_control (unsigned long control) -{ - i386bsd_dr_set (7, control); -} - -void -i386bsd_dr_set_addr (int regnum, CORE_ADDR addr) -{ - gdb_assert (regnum >= 0 && regnum <= 4); - - i386bsd_dr_set (regnum, addr); -} - -void -i386bsd_dr_reset_addr (int regnum) -{ - gdb_assert (regnum >= 0 && regnum <= 4); - - i386bsd_dr_set (regnum, 0); -} - -unsigned long -i386bsd_dr_get_status (void) -{ - struct dbreg dbregs; - - /* FIXME: kettenis/2001-03-31: Calling perror_with_name if the - ptrace call fails breaks debugging remote targets. The correct - way to fix this is to add the hardware breakpoint and watchpoint - stuff to the target vector. For now, just return zero if the - ptrace call fails. */ - if (ptrace (PT_GETDBREGS, PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) & dbregs, 0) == -1) -#if 0 - perror_with_name ("Couldn't read debug registers"); -#else - return 0; -#endif - - return dbregs.dr6; -} - -#endif /* PT_GETDBREGS */ - - -/* Support for the user struct. */ - -/* Return the address register REGNO. BLOCKEND is the value of - u.u_ar0, which should point to the registers. */ - -CORE_ADDR -register_u_addr (CORE_ADDR blockend, int regno) -{ - return (CORE_ADDR) REG_ADDR (blockend, regno); -} - -#include <sys/param.h> -#include <sys/user.h> - -/* Return the size of the user struct. */ - -int -kernel_u_size (void) -{ - return (sizeof (struct user)); -} - -/* See i386bsd-tdep.c. */ -extern int i386bsd_sigcontext_pc_offset; - -void -_initialize_i386bsd_nat (void) -{ - /* To support the recognition of signal handlers, i386bsd-tdep.c - hardcodes some constants. Inclusion of this file means that we - are compiling a native debugger, which means that we can use the - system header files and sysctl(3) to get at the relevant - information. */ - - /* Override the default value for the offset of the program counter - in the sigcontext structure. */ - i386bsd_sigcontext_pc_offset = offsetof (struct sigcontext, sc_pc); -} |