binutils-gdb/gdb/x86bsd-nat.c

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Consolidate x86 debug register code for BSD native targets. Move the debug register support code from amd64bsd-nat.c and i386bsd-nat.c into a shared x86bsd-nat.c. Instead of setting up x86_dr_low in amd64fbsd-nat.c and i386fbsd-nat.c, add a x86bsd_target function that creates a new target that inherits from inf_ptrace and sets up x86 debug registers if supported. In addition to initializing x86_dr_low, the x86bsd target installs a custom mourn_inferior target operation to clean up the x86 debug register state. Previously this was only done on amd64. Now it will be done for both i386 and amd64. The i386bsd_target and amd64bsd_target functions create targets that inherit from x86bsd rather than inf_ptrace. gdb/ChangeLog: * Makefile.in [HFILES_NO_SRCDIR]: Replace 'amd64bsd-nat.h' with 'x86bsd-nat.h'. * amd64bsd-nat.c: Include 'x86bsd-nat.h' instead of 'amd64bsd-nat.h'. (amd64bsd_xsave_len): Rename and move to x86bsd-nat.c. (amd64bsd_fetch_inferior_registers): Replace 'amd64bsd_xsave_len' with 'x86bsd_xsave_len'. (amd64bsd_store_inferior_registers): Likewise. (amd64bsd_target): Inherit from x86bsd_target. (amd64bsd_dr_get): Rename and move to x86bsd-nat.c. (amd64bsd_dr_set): Likewise. (amd64bsd_dr_set_control): Likewise. (amd64bsd_dr_set_addr): Likewise. (amd64bsd_dr_get_addr): Likewise. (amd64bsd_dr_get_status): Likewise. (amd64bsd_dr_get_control): Likewise. * amd64fbsd-nat.c: Include 'x86bsd-nat.h' instead of 'amd64bsd-nat.h'. (super_mourn_inferior): Move to x86bsd-nat.c. (amd64fbsd_mourn_inferior): Rename and move to x86bsd-nat.c. (amd64fbsd_read_description): Replace 'amd64bsd_xsave_len' with 'x86bsd_xsave_len'. (_initialize_amd64fbsd_nat): Remove x86 watchpoint setup and mourn_inferior' target op. * config/i386/fbsd.mh (NATDEPFILES): Add x86bsd-nat.o. * config/i386/fbsd64.mh: Likewise. * config/i386/nbsd64.mh: Likewise. * config/i386/nbsdelf.mh: Likewise. * config/i386/obsd.mh: Likewise. * config/i386/obsd64.mh: Likewise. * i386bsd-nat.c: Include 'x86bsd-nat.h'. (i386bsd_xsave_len): Rename and move to x86bsd-nat.c. (i386bsd_fetch_inferior_registers): Replace 'i386bsd_xsave_len' with 'x86bsd_xsave_len'. (i386bsd_store_inferior_registers): Likewise. (i386bsd_target): Inherit from x86bsd_target. (i386bsd_dr_get): Rename and move to x86bsd-nat.c. (i386bsd_dr_set): Likewise. (i386bsd_dr_set_control): Likewise. (i386bsd_dr_set_addr): Likewise. (i386bsd_dr_get_addr): Likewise. (i386bsd_dr_get_status): Likewise. (i386bsd_dr_get_control): Likewise. * i386bsd-nat.h (i386bsd_xsave_len): Remove. (i386bsd_dr_set_control): Remove. (i386bsd_dr_set_addr): Remove. (i386bsd_dr_get_addr): Remove. (i386bsd_dr_get_status): Remove. (i386bsd_dr_get_control): Remove. * i386fbsd-nat.c: Include 'x86bsd-nat.h'. (i386fbsd_read_description): Replace 'i386bsd_xsave_len' with 'x86bsd_xsave_len'. (_initialize_i386fbsd_nat): Remove x86 watchpoint setup and mourn_inferior' target op. * x86bsd-nat.c: New file. * x86bsd-nat.h: New file.
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/* Native-dependent code for X86 BSD's.
Copyright (C) 2003-2016 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 3 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, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "inferior.h"
#include "gdbthread.h"
Consolidate x86 debug register code for BSD native targets. Move the debug register support code from amd64bsd-nat.c and i386bsd-nat.c into a shared x86bsd-nat.c. Instead of setting up x86_dr_low in amd64fbsd-nat.c and i386fbsd-nat.c, add a x86bsd_target function that creates a new target that inherits from inf_ptrace and sets up x86 debug registers if supported. In addition to initializing x86_dr_low, the x86bsd target installs a custom mourn_inferior target operation to clean up the x86 debug register state. Previously this was only done on amd64. Now it will be done for both i386 and amd64. The i386bsd_target and amd64bsd_target functions create targets that inherit from x86bsd rather than inf_ptrace. gdb/ChangeLog: * Makefile.in [HFILES_NO_SRCDIR]: Replace 'amd64bsd-nat.h' with 'x86bsd-nat.h'. * amd64bsd-nat.c: Include 'x86bsd-nat.h' instead of 'amd64bsd-nat.h'. (amd64bsd_xsave_len): Rename and move to x86bsd-nat.c. (amd64bsd_fetch_inferior_registers): Replace 'amd64bsd_xsave_len' with 'x86bsd_xsave_len'. (amd64bsd_store_inferior_registers): Likewise. (amd64bsd_target): Inherit from x86bsd_target. (amd64bsd_dr_get): Rename and move to x86bsd-nat.c. (amd64bsd_dr_set): Likewise. (amd64bsd_dr_set_control): Likewise. (amd64bsd_dr_set_addr): Likewise. (amd64bsd_dr_get_addr): Likewise. (amd64bsd_dr_get_status): Likewise. (amd64bsd_dr_get_control): Likewise. * amd64fbsd-nat.c: Include 'x86bsd-nat.h' instead of 'amd64bsd-nat.h'. (super_mourn_inferior): Move to x86bsd-nat.c. (amd64fbsd_mourn_inferior): Rename and move to x86bsd-nat.c. (amd64fbsd_read_description): Replace 'amd64bsd_xsave_len' with 'x86bsd_xsave_len'. (_initialize_amd64fbsd_nat): Remove x86 watchpoint setup and mourn_inferior' target op. * config/i386/fbsd.mh (NATDEPFILES): Add x86bsd-nat.o. * config/i386/fbsd64.mh: Likewise. * config/i386/nbsd64.mh: Likewise. * config/i386/nbsdelf.mh: Likewise. * config/i386/obsd.mh: Likewise. * config/i386/obsd64.mh: Likewise. * i386bsd-nat.c: Include 'x86bsd-nat.h'. (i386bsd_xsave_len): Rename and move to x86bsd-nat.c. (i386bsd_fetch_inferior_registers): Replace 'i386bsd_xsave_len' with 'x86bsd_xsave_len'. (i386bsd_store_inferior_registers): Likewise. (i386bsd_target): Inherit from x86bsd_target. (i386bsd_dr_get): Rename and move to x86bsd-nat.c. (i386bsd_dr_set): Likewise. (i386bsd_dr_set_control): Likewise. (i386bsd_dr_set_addr): Likewise. (i386bsd_dr_get_addr): Likewise. (i386bsd_dr_get_status): Likewise. (i386bsd_dr_get_control): Likewise. * i386bsd-nat.h (i386bsd_xsave_len): Remove. (i386bsd_dr_set_control): Remove. (i386bsd_dr_set_addr): Remove. (i386bsd_dr_get_addr): Remove. (i386bsd_dr_get_status): Remove. (i386bsd_dr_get_control): Remove. * i386fbsd-nat.c: Include 'x86bsd-nat.h'. (i386fbsd_read_description): Replace 'i386bsd_xsave_len' with 'x86bsd_xsave_len'. (_initialize_i386fbsd_nat): Remove x86 watchpoint setup and mourn_inferior' target op. * x86bsd-nat.c: New file. * x86bsd-nat.h: New file.
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/* We include <signal.h> to make sure `struct fxsave64' is defined on
NetBSD, since NetBSD's <machine/reg.h> needs it. */
#include <signal.h>
#include <sys/types.h>
#include <sys/ptrace.h>
#include <machine/reg.h>
#include "x86-nat.h"
#include "x86bsd-nat.h"
#include "inf-ptrace.h"
#ifdef PT_GETXSTATE_INFO
size_t x86bsd_xsave_len;
#endif
/* Support for debug registers. */
#ifdef HAVE_PT_GETDBREGS
static void (*super_mourn_inferior) (struct target_ops *ops);
/* Implement the "to_mourn_inferior" target_ops method. */
static void
x86bsd_mourn_inferior (struct target_ops *ops)
{
x86_cleanup_dregs ();
super_mourn_inferior (ops);
}
/* 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 unsigned long
x86bsd_dr_get (ptid_t ptid, int regnum)
{
struct dbreg dbregs;
if (ptrace (PT_GETDBREGS, get_ptrace_pid (inferior_ptid),
(PTRACE_TYPE_ARG3) &dbregs, 0) == -1)
perror_with_name (_("Couldn't read debug registers"));
return DBREG_DRX ((&dbregs), regnum);
}
static void
x86bsd_dr_set (int regnum, unsigned long value)
{
struct thread_info *thread;
Consolidate x86 debug register code for BSD native targets. Move the debug register support code from amd64bsd-nat.c and i386bsd-nat.c into a shared x86bsd-nat.c. Instead of setting up x86_dr_low in amd64fbsd-nat.c and i386fbsd-nat.c, add a x86bsd_target function that creates a new target that inherits from inf_ptrace and sets up x86 debug registers if supported. In addition to initializing x86_dr_low, the x86bsd target installs a custom mourn_inferior target operation to clean up the x86 debug register state. Previously this was only done on amd64. Now it will be done for both i386 and amd64. The i386bsd_target and amd64bsd_target functions create targets that inherit from x86bsd rather than inf_ptrace. gdb/ChangeLog: * Makefile.in [HFILES_NO_SRCDIR]: Replace 'amd64bsd-nat.h' with 'x86bsd-nat.h'. * amd64bsd-nat.c: Include 'x86bsd-nat.h' instead of 'amd64bsd-nat.h'. (amd64bsd_xsave_len): Rename and move to x86bsd-nat.c. (amd64bsd_fetch_inferior_registers): Replace 'amd64bsd_xsave_len' with 'x86bsd_xsave_len'. (amd64bsd_store_inferior_registers): Likewise. (amd64bsd_target): Inherit from x86bsd_target. (amd64bsd_dr_get): Rename and move to x86bsd-nat.c. (amd64bsd_dr_set): Likewise. (amd64bsd_dr_set_control): Likewise. (amd64bsd_dr_set_addr): Likewise. (amd64bsd_dr_get_addr): Likewise. (amd64bsd_dr_get_status): Likewise. (amd64bsd_dr_get_control): Likewise. * amd64fbsd-nat.c: Include 'x86bsd-nat.h' instead of 'amd64bsd-nat.h'. (super_mourn_inferior): Move to x86bsd-nat.c. (amd64fbsd_mourn_inferior): Rename and move to x86bsd-nat.c. (amd64fbsd_read_description): Replace 'amd64bsd_xsave_len' with 'x86bsd_xsave_len'. (_initialize_amd64fbsd_nat): Remove x86 watchpoint setup and mourn_inferior' target op. * config/i386/fbsd.mh (NATDEPFILES): Add x86bsd-nat.o. * config/i386/fbsd64.mh: Likewise. * config/i386/nbsd64.mh: Likewise. * config/i386/nbsdelf.mh: Likewise. * config/i386/obsd.mh: Likewise. * config/i386/obsd64.mh: Likewise. * i386bsd-nat.c: Include 'x86bsd-nat.h'. (i386bsd_xsave_len): Rename and move to x86bsd-nat.c. (i386bsd_fetch_inferior_registers): Replace 'i386bsd_xsave_len' with 'x86bsd_xsave_len'. (i386bsd_store_inferior_registers): Likewise. (i386bsd_target): Inherit from x86bsd_target. (i386bsd_dr_get): Rename and move to x86bsd-nat.c. (i386bsd_dr_set): Likewise. (i386bsd_dr_set_control): Likewise. (i386bsd_dr_set_addr): Likewise. (i386bsd_dr_get_addr): Likewise. (i386bsd_dr_get_status): Likewise. (i386bsd_dr_get_control): Likewise. * i386bsd-nat.h (i386bsd_xsave_len): Remove. (i386bsd_dr_set_control): Remove. (i386bsd_dr_set_addr): Remove. (i386bsd_dr_get_addr): Remove. (i386bsd_dr_get_status): Remove. (i386bsd_dr_get_control): Remove. * i386fbsd-nat.c: Include 'x86bsd-nat.h'. (i386fbsd_read_description): Replace 'i386bsd_xsave_len' with 'x86bsd_xsave_len'. (_initialize_i386fbsd_nat): Remove x86 watchpoint setup and mourn_inferior' target op. * x86bsd-nat.c: New file. * x86bsd-nat.h: New file.
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struct dbreg dbregs;
if (ptrace (PT_GETDBREGS, get_ptrace_pid (inferior_ptid),
(PTRACE_TYPE_ARG3) &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. */
DBREG_DRX ((&dbregs), 7) &= ~(0xffffffff0000fc00);
DBREG_DRX ((&dbregs), regnum) = value;
ALL_NON_EXITED_THREADS (thread)
if (thread->inf == current_inferior ())
{
if (ptrace (PT_SETDBREGS, get_ptrace_pid (thread->ptid),
(PTRACE_TYPE_ARG3) &dbregs, 0) == -1)
perror_with_name (_("Couldn't write debug registers"));
}
Consolidate x86 debug register code for BSD native targets. Move the debug register support code from amd64bsd-nat.c and i386bsd-nat.c into a shared x86bsd-nat.c. Instead of setting up x86_dr_low in amd64fbsd-nat.c and i386fbsd-nat.c, add a x86bsd_target function that creates a new target that inherits from inf_ptrace and sets up x86 debug registers if supported. In addition to initializing x86_dr_low, the x86bsd target installs a custom mourn_inferior target operation to clean up the x86 debug register state. Previously this was only done on amd64. Now it will be done for both i386 and amd64. The i386bsd_target and amd64bsd_target functions create targets that inherit from x86bsd rather than inf_ptrace. gdb/ChangeLog: * Makefile.in [HFILES_NO_SRCDIR]: Replace 'amd64bsd-nat.h' with 'x86bsd-nat.h'. * amd64bsd-nat.c: Include 'x86bsd-nat.h' instead of 'amd64bsd-nat.h'. (amd64bsd_xsave_len): Rename and move to x86bsd-nat.c. (amd64bsd_fetch_inferior_registers): Replace 'amd64bsd_xsave_len' with 'x86bsd_xsave_len'. (amd64bsd_store_inferior_registers): Likewise. (amd64bsd_target): Inherit from x86bsd_target. (amd64bsd_dr_get): Rename and move to x86bsd-nat.c. (amd64bsd_dr_set): Likewise. (amd64bsd_dr_set_control): Likewise. (amd64bsd_dr_set_addr): Likewise. (amd64bsd_dr_get_addr): Likewise. (amd64bsd_dr_get_status): Likewise. (amd64bsd_dr_get_control): Likewise. * amd64fbsd-nat.c: Include 'x86bsd-nat.h' instead of 'amd64bsd-nat.h'. (super_mourn_inferior): Move to x86bsd-nat.c. (amd64fbsd_mourn_inferior): Rename and move to x86bsd-nat.c. (amd64fbsd_read_description): Replace 'amd64bsd_xsave_len' with 'x86bsd_xsave_len'. (_initialize_amd64fbsd_nat): Remove x86 watchpoint setup and mourn_inferior' target op. * config/i386/fbsd.mh (NATDEPFILES): Add x86bsd-nat.o. * config/i386/fbsd64.mh: Likewise. * config/i386/nbsd64.mh: Likewise. * config/i386/nbsdelf.mh: Likewise. * config/i386/obsd.mh: Likewise. * config/i386/obsd64.mh: Likewise. * i386bsd-nat.c: Include 'x86bsd-nat.h'. (i386bsd_xsave_len): Rename and move to x86bsd-nat.c. (i386bsd_fetch_inferior_registers): Replace 'i386bsd_xsave_len' with 'x86bsd_xsave_len'. (i386bsd_store_inferior_registers): Likewise. (i386bsd_target): Inherit from x86bsd_target. (i386bsd_dr_get): Rename and move to x86bsd-nat.c. (i386bsd_dr_set): Likewise. (i386bsd_dr_set_control): Likewise. (i386bsd_dr_set_addr): Likewise. (i386bsd_dr_get_addr): Likewise. (i386bsd_dr_get_status): Likewise. (i386bsd_dr_get_control): Likewise. * i386bsd-nat.h (i386bsd_xsave_len): Remove. (i386bsd_dr_set_control): Remove. (i386bsd_dr_set_addr): Remove. (i386bsd_dr_get_addr): Remove. (i386bsd_dr_get_status): Remove. (i386bsd_dr_get_control): Remove. * i386fbsd-nat.c: Include 'x86bsd-nat.h'. (i386fbsd_read_description): Replace 'i386bsd_xsave_len' with 'x86bsd_xsave_len'. (_initialize_i386fbsd_nat): Remove x86 watchpoint setup and mourn_inferior' target op. * x86bsd-nat.c: New file. * x86bsd-nat.h: New file.
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}
static void
x86bsd_dr_set_control (unsigned long control)
{
x86bsd_dr_set (7, control);
}
static void
x86bsd_dr_set_addr (int regnum, CORE_ADDR addr)
{
gdb_assert (regnum >= 0 && regnum <= 4);
x86bsd_dr_set (regnum, addr);
}
static CORE_ADDR
x86bsd_dr_get_addr (int regnum)
{
return x86bsd_dr_get (inferior_ptid, regnum);
}
static unsigned long
x86bsd_dr_get_status (void)
{
return x86bsd_dr_get (inferior_ptid, 6);
}
static unsigned long
x86bsd_dr_get_control (void)
{
return x86bsd_dr_get (inferior_ptid, 7);
}
#endif /* PT_GETDBREGS */
/* Create a prototype *BSD/x86 target. The client can override it
with local methods. */
struct target_ops *
x86bsd_target (void)
{
struct target_ops *t;
t = inf_ptrace_target ();
#ifdef HAVE_PT_GETDBREGS
x86_use_watchpoints (t);
x86_dr_low.set_control = x86bsd_dr_set_control;
x86_dr_low.set_addr = x86bsd_dr_set_addr;
x86_dr_low.get_addr = x86bsd_dr_get_addr;
x86_dr_low.get_status = x86bsd_dr_get_status;
x86_dr_low.get_control = x86bsd_dr_get_control;
x86_set_debug_register_length (sizeof (void *));
super_mourn_inferior = t->to_mourn_inferior;
t->to_mourn_inferior = x86bsd_mourn_inferior;
#endif /* HAVE_PT_GETDBREGS */
return t;
}