94309df7aa
This allows gdb to fetch per-thread registers for multi-threaded FreeBSD processes. Export get_ptrace_pid() from inf-ptrace.c and use it to determine the PID to pass to ptrace in pan-BSD native targets. NetBSD and OpenBSD also accept LWP IDs for ptrace requests to fetch per-thread state. gdb/ChangeLog: * amd64bsd-nat.c (amd64bsd_fetch_inferior_registers): Use get_ptrace_pid. (amd64bsd_store_inferior_registers): Use get_ptrace_pid. (amd64bsd_dr_get): Use get_ptrace_pid. (amd64bsd_dr_set): Use get_ptrace_pid. * i386bsd-nat.c (i386bsd_fetch_inferior_registers): Use get_ptrace_pid. (i386bsd_store_inferior_registers): Use get_ptrace_pid. (i386bsd_dr_get): Use get_ptrace_pid. (i386bsd_dr_set): Use get_ptrace_pid. * inf-ptrace.c (get_ptrace_pid): Export. * inf-ptrace.h (get_ptrace_pid): Declare. * ppcfbsd-nat.c (ppcfbsd_fetch_inferior_registers): Use lwp id. (ppcfbsd_store_inferior_registers): Use lwp id.
235 lines
6.4 KiB
C
235 lines
6.4 KiB
C
/* Native-dependent code for AMD64 BSD's.
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Copyright (C) 2003-2016 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 "inferior.h"
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#include "regcache.h"
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#include "target.h"
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/* We include <signal.h> to make sure `struct fxsave64' is defined on
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NetBSD, since NetBSD's <machine/reg.h> needs it. */
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#include <signal.h>
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#include <sys/types.h>
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#include <sys/ptrace.h>
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#include <machine/reg.h>
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#include "amd64-tdep.h"
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#include "amd64-nat.h"
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#include "amd64bsd-nat.h"
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#include "inf-ptrace.h"
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#ifdef PT_GETXSTATE_INFO
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size_t amd64bsd_xsave_len;
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#endif
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/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
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for all registers (including the floating-point registers). */
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static void
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amd64bsd_fetch_inferior_registers (struct target_ops *ops,
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struct regcache *regcache, int regnum)
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{
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struct gdbarch *gdbarch = get_regcache_arch (regcache);
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if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum))
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{
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struct reg regs;
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if (ptrace (PT_GETREGS, get_ptrace_pid (inferior_ptid),
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(PTRACE_TYPE_ARG3) ®s, 0) == -1)
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perror_with_name (_("Couldn't get registers"));
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amd64_supply_native_gregset (regcache, ®s, -1);
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if (regnum != -1)
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return;
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}
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if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum))
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{
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struct fpreg fpregs;
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#ifdef PT_GETXSTATE_INFO
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char *xstateregs;
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if (amd64bsd_xsave_len != 0)
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{
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xstateregs = alloca (amd64bsd_xsave_len);
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if (ptrace (PT_GETXSTATE, get_ptrace_pid (inferior_ptid),
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(PTRACE_TYPE_ARG3) xstateregs, 0) == -1)
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perror_with_name (_("Couldn't get extended state status"));
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amd64_supply_xsave (regcache, -1, xstateregs);
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return;
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}
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#endif
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if (ptrace (PT_GETFPREGS, get_ptrace_pid (inferior_ptid),
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(PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
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perror_with_name (_("Couldn't get floating point status"));
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amd64_supply_fxsave (regcache, -1, &fpregs);
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}
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}
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/* Store register REGNUM back into the inferior. If REGNUM is -1, do
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this for all registers (including the floating-point registers). */
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static void
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amd64bsd_store_inferior_registers (struct target_ops *ops,
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struct regcache *regcache, int regnum)
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{
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struct gdbarch *gdbarch = get_regcache_arch (regcache);
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if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum))
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{
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struct reg regs;
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if (ptrace (PT_GETREGS, get_ptrace_pid (inferior_ptid),
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(PTRACE_TYPE_ARG3) ®s, 0) == -1)
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perror_with_name (_("Couldn't get registers"));
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amd64_collect_native_gregset (regcache, ®s, regnum);
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if (ptrace (PT_SETREGS, get_ptrace_pid (inferior_ptid),
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(PTRACE_TYPE_ARG3) ®s, 0) == -1)
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perror_with_name (_("Couldn't write registers"));
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if (regnum != -1)
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return;
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}
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if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum))
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{
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struct fpreg fpregs;
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#ifdef PT_GETXSTATE_INFO
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char *xstateregs;
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if (amd64bsd_xsave_len != 0)
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{
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xstateregs = alloca (amd64bsd_xsave_len);
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if (ptrace (PT_GETXSTATE, get_ptrace_pid (inferior_ptid),
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(PTRACE_TYPE_ARG3) xstateregs, 0) == -1)
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perror_with_name (_("Couldn't get extended state status"));
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amd64_collect_xsave (regcache, regnum, xstateregs, 0);
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if (ptrace (PT_SETXSTATE, get_ptrace_pid (inferior_ptid),
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(PTRACE_TYPE_ARG3) xstateregs, amd64bsd_xsave_len) == -1)
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perror_with_name (_("Couldn't write extended state status"));
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return;
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}
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#endif
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if (ptrace (PT_GETFPREGS, get_ptrace_pid (inferior_ptid),
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(PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
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perror_with_name (_("Couldn't get floating point status"));
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amd64_collect_fxsave (regcache, regnum, &fpregs);
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if (ptrace (PT_SETFPREGS, get_ptrace_pid (inferior_ptid),
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(PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
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perror_with_name (_("Couldn't write floating point status"));
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}
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}
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/* Create a prototype *BSD/amd64 target. The client can override it
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with local methods. */
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struct target_ops *
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amd64bsd_target (void)
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{
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struct target_ops *t;
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t = inf_ptrace_target ();
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t->to_fetch_registers = amd64bsd_fetch_inferior_registers;
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t->to_store_registers = amd64bsd_store_inferior_registers;
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return t;
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}
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/* Support for debug registers. */
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#ifdef HAVE_PT_GETDBREGS
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static unsigned long
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amd64bsd_dr_get (ptid_t ptid, int regnum)
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{
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struct dbreg dbregs;
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if (ptrace (PT_GETDBREGS, get_ptrace_pid (inferior_ptid),
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(PTRACE_TYPE_ARG3) &dbregs, 0) == -1)
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perror_with_name (_("Couldn't read debug registers"));
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return DBREG_DRX ((&dbregs), regnum);
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}
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static void
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amd64bsd_dr_set (int regnum, unsigned long value)
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{
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struct dbreg dbregs;
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if (ptrace (PT_GETDBREGS, get_ptrace_pid (inferior_ptid),
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(PTRACE_TYPE_ARG3) &dbregs, 0) == -1)
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perror_with_name (_("Couldn't get debug registers"));
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/* For some mysterious reason, some of the reserved bits in the
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debug control register get set. Mask these off, otherwise the
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ptrace call below will fail. */
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DBREG_DRX ((&dbregs), 7) &= ~(0xffffffff0000fc00);
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DBREG_DRX ((&dbregs), regnum) = value;
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if (ptrace (PT_SETDBREGS, get_ptrace_pid (inferior_ptid),
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(PTRACE_TYPE_ARG3) &dbregs, 0) == -1)
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perror_with_name (_("Couldn't write debug registers"));
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}
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void
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amd64bsd_dr_set_control (unsigned long control)
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{
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amd64bsd_dr_set (7, control);
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}
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void
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amd64bsd_dr_set_addr (int regnum, CORE_ADDR addr)
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{
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gdb_assert (regnum >= 0 && regnum <= 4);
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amd64bsd_dr_set (regnum, addr);
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}
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CORE_ADDR
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amd64bsd_dr_get_addr (int regnum)
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{
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return amd64bsd_dr_get (inferior_ptid, regnum);
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}
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unsigned long
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amd64bsd_dr_get_status (void)
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{
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return amd64bsd_dr_get (inferior_ptid, 6);
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}
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unsigned long
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amd64bsd_dr_get_control (void)
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{
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return amd64bsd_dr_get (inferior_ptid, 7);
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}
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#endif /* PT_GETDBREGS */
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