commit a3405d124e1388b613a35af49f19f0cc1b8d959d Author: John Baldwin Date: Mon Jun 27 13:19:09 2016 -0700 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. diff --git gdb/Makefile.in gdb/Makefile.in index 16d5f27..5af6103 100644 --- gdb/Makefile.in +++ gdb/Makefile.in @@ -912,7 +912,7 @@ common/gdb_signals.h nat/gdb_thread_db.h common/gdb_vecs.h \ common/x86-xstate.h nat/linux-ptrace.h nat/mips-linux-watch.h \ proc-utils.h aarch64-tdep.h arm-tdep.h ax-gdb.h ppcfbsd-tdep.h \ ppcnbsd-tdep.h cli-out.h gdb_expat.h breakpoint.h infcall.h obsd-tdep.h \ -exec.h m32r-tdep.h osabi.h gdbcore.h amd64bsd-nat.h \ +exec.h m32r-tdep.h osabi.h gdbcore.h x86bsd-nat.h \ i386bsd-nat.h xml-support.h xml-tdesc.h alphabsd-tdep.h gdb_obstack.h \ ia64-tdep.h ada-lang.h varobj.h varobj-iter.h frv-tdep.h \ nto-tdep.h serial.h \ diff --git gdb/amd64bsd-nat.c gdb/amd64bsd-nat.c index e278a91..b87672a 100644 --- gdb/amd64bsd-nat.c +++ gdb/amd64bsd-nat.c @@ -31,14 +31,10 @@ #include "amd64-tdep.h" #include "amd64-nat.h" -#include "amd64bsd-nat.h" +#include "x86bsd-nat.h" #include "inf-ptrace.h" -#ifdef PT_GETXSTATE_INFO -size_t amd64bsd_xsave_len; -#endif - /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this for all registers (including the floating-point registers). */ @@ -67,9 +63,9 @@ amd64bsd_fetch_inferior_registers (struct target_ops *ops, #ifdef PT_GETXSTATE_INFO void *xstateregs; - if (amd64bsd_xsave_len != 0) + if (x86bsd_xsave_len != 0) { - xstateregs = alloca (amd64bsd_xsave_len); + xstateregs = alloca (x86bsd_xsave_len); if (ptrace (PT_GETXSTATE, get_ptrace_pid (inferior_ptid), (PTRACE_TYPE_ARG3) xstateregs, 0) == -1) perror_with_name (_("Couldn't get extended state status")); @@ -120,9 +116,9 @@ amd64bsd_store_inferior_registers (struct target_ops *ops, #ifdef PT_GETXSTATE_INFO void *xstateregs; - if (amd64bsd_xsave_len != 0) + if (x86bsd_xsave_len != 0) { - xstateregs = alloca (amd64bsd_xsave_len); + xstateregs = alloca (x86bsd_xsave_len); if (ptrace (PT_GETXSTATE, get_ptrace_pid (inferior_ptid), (PTRACE_TYPE_ARG3) xstateregs, 0) == -1) perror_with_name (_("Couldn't get extended state status")); @@ -130,7 +126,7 @@ amd64bsd_store_inferior_registers (struct target_ops *ops, amd64_collect_xsave (regcache, regnum, xstateregs, 0); if (ptrace (PT_SETXSTATE, get_ptrace_pid (inferior_ptid), - (PTRACE_TYPE_ARG3) xstateregs, amd64bsd_xsave_len) == -1) + (PTRACE_TYPE_ARG3) xstateregs, x86bsd_xsave_len) == -1) perror_with_name (_("Couldn't write extended state status")); return; } @@ -156,80 +152,8 @@ amd64bsd_target (void) { struct target_ops *t; - t = inf_ptrace_target (); + t = x86bsd_target (); t->to_fetch_registers = amd64bsd_fetch_inferior_registers; t->to_store_registers = amd64bsd_store_inferior_registers; return t; } - - -/* Support for debug registers. */ - -#ifdef HAVE_PT_GETDBREGS - -static unsigned long -amd64bsd_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 -amd64bsd_dr_set (int regnum, unsigned long value) -{ - 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; - - if (ptrace (PT_SETDBREGS, get_ptrace_pid (inferior_ptid), - (PTRACE_TYPE_ARG3) &dbregs, 0) == -1) - perror_with_name (_("Couldn't write debug registers")); -} - -void -amd64bsd_dr_set_control (unsigned long control) -{ - amd64bsd_dr_set (7, control); -} - -void -amd64bsd_dr_set_addr (int regnum, CORE_ADDR addr) -{ - gdb_assert (regnum >= 0 && regnum <= 4); - - amd64bsd_dr_set (regnum, addr); -} - -CORE_ADDR -amd64bsd_dr_get_addr (int regnum) -{ - return amd64bsd_dr_get (inferior_ptid, regnum); -} - -unsigned long -amd64bsd_dr_get_status (void) -{ - return amd64bsd_dr_get (inferior_ptid, 6); -} - -unsigned long -amd64bsd_dr_get_control (void) -{ - return amd64bsd_dr_get (inferior_ptid, 7); -} - -#endif /* PT_GETDBREGS */ diff --git gdb/amd64bsd-nat.h gdb/amd64bsd-nat.h deleted file mode 100644 index f6a4022..0000000 --- gdb/amd64bsd-nat.h +++ /dev/null @@ -1,38 +0,0 @@ -/* Native-dependent code for AMD64 BSD's. - - Copyright (C) 2011-2016 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 . */ - -#ifndef AMD64BSD_NAT_H -#define AMD64BSD_NAT_H - -/* Low level amd64 XSAVE info. */ -extern size_t amd64bsd_xsave_len; - -/* Low level amd64 debug register functions. */ - -extern void amd64bsd_dr_set_control (unsigned long control); - -extern void amd64bsd_dr_set_addr (int regnum, CORE_ADDR addr); - -extern CORE_ADDR amd64bsd_dr_get_addr (int regnum); - -extern unsigned long amd64bsd_dr_get_status (void); - -extern unsigned long amd64bsd_dr_get_control (void); - -#endif /* amd64bsd-nat.h */ diff --git gdb/amd64fbsd-nat.c gdb/amd64fbsd-nat.c index 63a7197..66c374c 100644 --- gdb/amd64fbsd-nat.c +++ gdb/amd64fbsd-nat.c @@ -32,7 +32,7 @@ #include "fbsd-nat.h" #include "amd64-tdep.h" #include "amd64-nat.h" -#include "amd64bsd-nat.h" +#include "x86bsd-nat.h" #include "x86-nat.h" @@ -140,17 +140,6 @@ amd64fbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb) } -static void (*super_mourn_inferior) (struct target_ops *ops); - -static void -amd64fbsd_mourn_inferior (struct target_ops *ops) -{ -#ifdef HAVE_PT_GETDBREGS - x86_cleanup_dregs (); -#endif - super_mourn_inferior (ops); -} - /* Implement the to_read_description method. */ static const struct target_desc * @@ -175,13 +164,13 @@ amd64fbsd_read_description (struct target_ops *ops) if (ptrace (PT_GETXSTATE_INFO, ptid_get_pid (inferior_ptid), (PTRACE_TYPE_ARG3) &info, sizeof (info)) == 0) { - amd64bsd_xsave_len = info.xsave_len; + x86bsd_xsave_len = info.xsave_len; xcr0 = info.xsave_mask; } xsave_probed = 1; } - if (amd64bsd_xsave_len != 0) + if (x86bsd_xsave_len != 0) { if (is64) return amd64_target_description (xcr0); @@ -209,22 +198,6 @@ _initialize_amd64fbsd_nat (void) /* Add some extra features to the common *BSD/i386 target. */ t = amd64bsd_target (); - -#ifdef HAVE_PT_GETDBREGS - - x86_use_watchpoints (t); - - x86_dr_low.set_control = amd64bsd_dr_set_control; - x86_dr_low.set_addr = amd64bsd_dr_set_addr; - x86_dr_low.get_addr = amd64bsd_dr_get_addr; - x86_dr_low.get_status = amd64bsd_dr_get_status; - x86_dr_low.get_control = amd64bsd_dr_get_control; - x86_set_debug_register_length (8); - -#endif /* HAVE_PT_GETDBREGS */ - - super_mourn_inferior = t->to_mourn_inferior; - t->to_mourn_inferior = amd64fbsd_mourn_inferior; t->to_read_description = amd64fbsd_read_description; fbsd_nat_add_target (t); diff --git gdb/config/i386/fbsd.mh gdb/config/i386/fbsd.mh index e5bff3a..1db6660 100644 --- gdb/config/i386/fbsd.mh +++ gdb/config/i386/fbsd.mh @@ -1,7 +1,7 @@ # Host: FreeBSD/i386 NATDEPFILES= fork-child.o inf-ptrace.o \ - fbsd-nat.o x86-nat.o x86-dregs.o i386bsd-nat.o i386fbsd-nat.o \ - bsd-kvm.o + fbsd-nat.o x86-nat.o x86-dregs.o x86bsd-nat.o i386bsd-nat.o \ + i386fbsd-nat.o bsd-kvm.o NAT_FILE= nm-fbsd.h HAVE_NATIVE_GCORE_HOST = 1 diff --git gdb/config/i386/fbsd64.mh gdb/config/i386/fbsd64.mh index 329c526..e196c00 100644 --- gdb/config/i386/fbsd64.mh +++ gdb/config/i386/fbsd64.mh @@ -1,7 +1,7 @@ # Host: FreeBSD/amd64 NATDEPFILES= fork-child.o inf-ptrace.o \ fbsd-nat.o amd64-nat.o amd64bsd-nat.o amd64fbsd-nat.o \ - bsd-kvm.o x86-nat.o x86-dregs.o + bsd-kvm.o x86-nat.o x86-dregs.o x86bsd-nat.o HAVE_NATIVE_GCORE_HOST = 1 LOADLIBES= -lkvm diff --git gdb/config/i386/nbsd64.mh gdb/config/i386/nbsd64.mh index 5de8cf5..5fa369f 100644 --- gdb/config/i386/nbsd64.mh +++ gdb/config/i386/nbsd64.mh @@ -1,3 +1,3 @@ # Host: NetBSD/amd64 NATDEPFILES= fork-child.o inf-ptrace.o \ - nbsd-nat.o amd64-nat.o amd64bsd-nat.o amd64nbsd-nat.o + nbsd-nat.o amd64-nat.o x86bsd-nat.o amd64bsd-nat.o amd64nbsd-nat.o diff --git gdb/config/i386/nbsdelf.mh gdb/config/i386/nbsdelf.mh index d27c842..f8b9d6c 100644 --- gdb/config/i386/nbsdelf.mh +++ gdb/config/i386/nbsdelf.mh @@ -1,5 +1,5 @@ # Host: NetBSD/i386 ELF NATDEPFILES= fork-child.o inf-ptrace.o \ - nbsd-nat.o i386bsd-nat.o i386nbsd-nat.o bsd-kvm.o + nbsd-nat.o x86bsd-nat.o i386bsd-nat.o i386nbsd-nat.o bsd-kvm.o LOADLIBES= -lkvm diff --git gdb/config/i386/obsd.mh gdb/config/i386/obsd.mh index a9041f4..3845d26 100644 --- gdb/config/i386/obsd.mh +++ gdb/config/i386/obsd.mh @@ -1,5 +1,5 @@ # Host: OpenBSD/i386 ELF NATDEPFILES= fork-child.o inf-ptrace.o obsd-nat.o \ - i386bsd-nat.o i386obsd-nat.o bsd-kvm.o + x86bsd-nat.o i386bsd-nat.o i386obsd-nat.o bsd-kvm.o LOADLIBES= -lkvm diff --git gdb/config/i386/obsd64.mh gdb/config/i386/obsd64.mh index 386a582..2a8c42c 100644 --- gdb/config/i386/obsd64.mh +++ gdb/config/i386/obsd64.mh @@ -1,5 +1,5 @@ # Host: OpenBSD/amd64 NATDEPFILES= fork-child.o inf-ptrace.o obsd-nat.o \ - amd64-nat.o amd64bsd-nat.o amd64obsd-nat.o bsd-kvm.o + amd64-nat.o x86bsd-nat.o amd64bsd-nat.o amd64obsd-nat.o bsd-kvm.o LOADLIBES= -lkvm diff --git gdb/i386bsd-nat.c gdb/i386bsd-nat.c index f5f4a0f..b6b143b 100644 --- gdb/i386bsd-nat.c +++ gdb/i386bsd-nat.c @@ -29,6 +29,7 @@ #include "i386-tdep.h" #include "i387-tdep.h" +#include "x86bsd-nat.h" #include "i386bsd-nat.h" #include "inf-ptrace.h" @@ -81,10 +82,6 @@ static int i386bsd_r_reg_offset[] = so that we try PT_GETXMMREGS the first time around. */ static int have_ptrace_xmmregs = -1; #endif - -#ifdef PT_GETXSTATE_INFO -size_t i386bsd_xsave_len; -#endif /* Supply the general-purpose registers in GREGS, to REGCACHE. */ @@ -155,11 +152,11 @@ i386bsd_fetch_inferior_registers (struct target_ops *ops, #endif #ifdef PT_GETXSTATE_INFO - if (i386bsd_xsave_len != 0) + if (x86bsd_xsave_len != 0) { void *xstateregs; - xstateregs = alloca (i386bsd_xsave_len); + xstateregs = alloca (x86bsd_xsave_len); if (ptrace (PT_GETXSTATE, get_ptrace_pid (inferior_ptid), (PTRACE_TYPE_ARG3) xstateregs, 0) == -1) perror_with_name (_("Couldn't get extended state status")); @@ -225,11 +222,11 @@ i386bsd_store_inferior_registers (struct target_ops *ops, #endif #ifdef PT_GETXSTATE_INFO - if (i386bsd_xsave_len != 0) + if (x86bsd_xsave_len != 0) { void *xstateregs; - xstateregs = alloca (i386bsd_xsave_len); + xstateregs = alloca (x86bsd_xsave_len); if (ptrace (PT_GETXSTATE, get_ptrace_pid (inferior_ptid), (PTRACE_TYPE_ARG3) xstateregs, 0) == -1) perror_with_name (_("Couldn't get extended state status")); @@ -237,7 +234,7 @@ i386bsd_store_inferior_registers (struct target_ops *ops, i387_collect_xsave (regcache, -1, xstateregs, 0); if (ptrace (PT_SETXSTATE, get_ptrace_pid (inferior_ptid), - (PTRACE_TYPE_ARG3) xstateregs, i386bsd_xsave_len) == -1) + (PTRACE_TYPE_ARG3) xstateregs, x86bsd_xsave_len) == -1) perror_with_name (_("Couldn't write extended state status")); return; } @@ -283,91 +280,13 @@ i386bsd_target (void) { struct target_ops *t; - t = inf_ptrace_target (); + t = x86bsd_target (); t->to_fetch_registers = i386bsd_fetch_inferior_registers; t->to_store_registers = i386bsd_store_inferior_registers; return t; } -/* 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 unsigned long -i386bsd_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 -i386bsd_dr_set (int regnum, unsigned int value) -{ - 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) &= ~(0x0000fc00); - - DBREG_DRX ((&dbregs), regnum) = value; - - if (ptrace (PT_SETDBREGS, get_ptrace_pid (inferior_ptid), - (PTRACE_TYPE_ARG3) &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); -} - -CORE_ADDR -i386bsd_dr_get_addr (int regnum) -{ - return i386bsd_dr_get (inferior_ptid, regnum); -} - -unsigned long -i386bsd_dr_get_status (void) -{ - return i386bsd_dr_get (inferior_ptid, 6); -} - -unsigned long -i386bsd_dr_get_control (void) -{ - return i386bsd_dr_get (inferior_ptid, 7); -} - -#endif /* PT_GETDBREGS */ - - /* Provide a prototype to silence -Wmissing-prototypes. */ void _initialize_i386bsd_nat (void); diff --git gdb/i386bsd-nat.h gdb/i386bsd-nat.h index 78ea551..1b51d19 100644 --- gdb/i386bsd-nat.h +++ gdb/i386bsd-nat.h @@ -25,19 +25,4 @@ extern struct target_ops *i386bsd_target (void); -/* Low level i386 XSAVE info. */ -extern size_t i386bsd_xsave_len; - -/* low level i386 debug register functions used in i386fbsd-nat.c. */ - -extern void i386bsd_dr_set_control (unsigned long control); - -extern void i386bsd_dr_set_addr (int regnum, CORE_ADDR addr); - -extern CORE_ADDR i386bsd_dr_get_addr (int regnum); - -extern unsigned long i386bsd_dr_get_status (void); - -extern unsigned long i386bsd_dr_get_control (void); - #endif /* i386bsd-nat.h */ diff --git gdb/i386fbsd-nat.c gdb/i386fbsd-nat.c index 7d371a6..716b513 100644 --- gdb/i386fbsd-nat.c +++ gdb/i386fbsd-nat.c @@ -30,6 +30,7 @@ #include "fbsd-nat.h" #include "i386-tdep.h" #include "x86-nat.h" +#include "x86bsd-nat.h" #include "i386bsd-nat.h" /* Resume execution of the inferior process. If STEP is nonzero, @@ -132,13 +133,13 @@ i386fbsd_read_description (struct target_ops *ops) if (ptrace (PT_GETXSTATE_INFO, ptid_get_pid (inferior_ptid), (PTRACE_TYPE_ARG3) &info, sizeof (info)) == 0) { - i386bsd_xsave_len = info.xsave_len; + x86bsd_xsave_len = info.xsave_len; xcr0 = info.xsave_mask; } xsave_probed = 1; } - if (i386bsd_xsave_len != 0) + if (x86bsd_xsave_len != 0) { return i386_target_description (xcr0); } @@ -158,19 +159,6 @@ _initialize_i386fbsd_nat (void) /* Add some extra features to the common *BSD/i386 target. */ t = i386bsd_target (); -#ifdef HAVE_PT_GETDBREGS - - x86_use_watchpoints (t); - - x86_dr_low.set_control = i386bsd_dr_set_control; - x86_dr_low.set_addr = i386bsd_dr_set_addr; - x86_dr_low.get_addr = i386bsd_dr_get_addr; - x86_dr_low.get_status = i386bsd_dr_get_status; - x86_dr_low.get_control = i386bsd_dr_get_control; - x86_set_debug_register_length (4); - -#endif /* HAVE_PT_GETDBREGS */ - #ifdef PT_GETXSTATE_INFO t->to_read_description = i386fbsd_read_description; #endif diff --git gdb/x86bsd-nat.c gdb/x86bsd-nat.c new file mode 100644 index 0000000..0c56848 --- /dev/null +++ gdb/x86bsd-nat.c @@ -0,0 +1,150 @@ +/* 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 . */ + +#include "defs.h" +#include "inferior.h" + +/* We include to make sure `struct fxsave64' is defined on + NetBSD, since NetBSD's needs it. */ +#include +#include +#include +#include + +#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 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; + + if (ptrace (PT_SETDBREGS, get_ptrace_pid (inferior_ptid), + (PTRACE_TYPE_ARG3) &dbregs, 0) == -1) + perror_with_name (_("Couldn't write debug registers")); +} + +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; +} diff --git gdb/x86bsd-nat.h gdb/x86bsd-nat.h new file mode 100644 index 0000000..6d39697 --- /dev/null +++ gdb/x86bsd-nat.h @@ -0,0 +1,31 @@ +/* Native-dependent code for x86 BSD's. + + Copyright (C) 2011-2016 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 . */ + +#ifndef X86BSD_NAT_H +#define X86BSD_NAT_H + +/* Low level x86 XSAVE info. */ +extern size_t x86bsd_xsave_len; + +/* Create a prototype *BSD/x86 target. The client can override it + with local methods. */ + +extern struct target_ops *x86bsd_target (void); + +#endif /* x86bsd-nat.h */