[PATCH 08/14] Make lwp_info.arch_private handling shared
Gary Benson
gbenson@redhat.com
Mon Sep 8 16:03:00 GMT 2014
This commit moves the code to handle lwp_info.arch_private for
Linux x86 into a new shared file, nat/x86-linux.c.
gdb/ChangeLog:
* nat/x86-linux.h: New file.
* nat/x86-linux.c: Likewise.
* Makefile.in (HFILES_NO_SRCDIR): Add nat/x86-linux.h.
(x86-linux.o): New rule.
* config/i386/linux.mh (NATDEPFILES): Add x86-linux.o.
* config/i386/linux64.mh (NATDEPFILES): Likewise.
* nat/linux-nat.h (struct arch_lwp_info): New forward declaration.
(lwp_set_arch_private_info): New declaration.
(lwp_arch_private_info): Likewise.
* linux-nat.c (lwp_set_arch_private_info): New function.
(lwp_arch_private_info): Likewise.
* x86-linux-nat.c: Include nat/x86-linux.h.
(arch_lwp_info): Removed structure.
(update_debug_registers_callback):
Use lwp_set_debug_registers_changed.
(x86_linux_prepare_to_resume): Use lwp_debug_registers_changed
and lwp_set_debug_registers_changed.
(x86_linux_new_thread): Use lwp_set_debug_registers_changed.
gdb/gdbserver/ChangeLog:
* Makefile.in (x86-linux.o): New rule.
* configure.srv: Add x86-linux.o to relevant targets.
* linux-low.c (lwp_set_arch_private_info): New function.
(lwp_arch_private_info): Likewise.
* linux-x86-low.c: Include nat/x86-linux.h.
(arch_lwp_info): Removed structure.
(update_debug_registers_callback):
Use lwp_set_debug_registers_changed.
(x86_linux_prepare_to_resume): Use lwp_debug_registers_changed
and lwp_set_debug_registers_changed.
(x86_linux_new_thread): Use lwp_set_debug_registers_changed.
---
gdb/ChangeLog | 21 +++++++++++++++
gdb/Makefile.in | 6 +++-
gdb/config/i386/linux.mh | 2 +-
gdb/config/i386/linux64.mh | 2 +-
gdb/gdbserver/ChangeLog | 14 ++++++++++
gdb/gdbserver/Makefile.in | 3 ++
gdb/gdbserver/configure.srv | 4 +-
gdb/gdbserver/linux-low.c | 17 ++++++++++++
gdb/gdbserver/linux-x86-low.c | 21 +++-----------
gdb/linux-nat.c | 17 ++++++++++++
gdb/nat/linux-nat.h | 12 ++++++++
gdb/nat/x86-linux.c | 57 +++++++++++++++++++++++++++++++++++++++++
gdb/nat/x86-linux.h | 38 +++++++++++++++++++++++++++
gdb/x86-linux-nat.c | 30 +++------------------
14 files changed, 198 insertions(+), 46 deletions(-)
create mode 100644 gdb/nat/x86-linux.c
create mode 100644 gdb/nat/x86-linux.h
diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index c454503..f2bbf6b 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -940,7 +940,7 @@ common/print-utils.h common/rsp-low.h nat/x86-dregs.h x86-linux-nat.h \
i386-linux-nat.h common/common-defs.h common/errors.h common/common-types.h \
common/common-debug.h common/cleanups.h common/gdb_setjmp.h \
common/common-exceptions.h target/target.h target/symbol.h \
-common/common-regcache.h common/common-inferior.h
+common/common-regcache.h common/common-inferior.h nat/x86-linux.h
# Header files that already have srcdir in them, or which are in objdir.
@@ -2221,6 +2221,10 @@ mips-linux-watch.o: ${srcdir}/nat/mips-linux-watch.c
$(COMPILE) $(srcdir)/nat/mips-linux-watch.c
$(POSTCOMPILE)
+x86-linux.o: ${srcdir}/nat/x86-linux.c
+ $(COMPILE) $(srcdir)/nat/x86-linux.c
+ $(POSTCOMPILE)
+
#
# gdb/tui/ dependencies
#
diff --git a/gdb/config/i386/linux.mh b/gdb/config/i386/linux.mh
index a4e4842..f409bfe 100644
--- a/gdb/config/i386/linux.mh
+++ b/gdb/config/i386/linux.mh
@@ -5,7 +5,7 @@ NATDEPFILES= inf-ptrace.o fork-child.o \
x86-nat.o x86-dregs.o i386-linux-nat.o x86-linux-nat.o \
proc-service.o linux-thread-db.o \
linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o linux-ptrace.o \
- linux-btrace.o linux-waitpid.o
+ linux-btrace.o linux-waitpid.o x86-linux.o
NAT_CDEPS = $(srcdir)/proc-service.list
# The dynamically loaded libthread_db needs access to symbols in the
diff --git a/gdb/config/i386/linux64.mh b/gdb/config/i386/linux64.mh
index d557202..1d40167 100644
--- a/gdb/config/i386/linux64.mh
+++ b/gdb/config/i386/linux64.mh
@@ -5,7 +5,7 @@ NATDEPFILES= inf-ptrace.o fork-child.o \
linux-nat.o linux-osdata.o \
proc-service.o linux-thread-db.o linux-fork.o \
linux-procfs.o linux-ptrace.o linux-btrace.o \
- linux-waitpid.o
+ linux-waitpid.o x86-linux.o
NAT_FILE= config/nm-linux.h
NAT_CDEPS = $(srcdir)/proc-service.list
diff --git a/gdb/gdbserver/Makefile.in b/gdb/gdbserver/Makefile.in
index 3b1c783..03f4ae4 100644
--- a/gdb/gdbserver/Makefile.in
+++ b/gdb/gdbserver/Makefile.in
@@ -583,6 +583,9 @@ linux-waitpid.o: ../nat/linux-waitpid.c
mips-linux-watch.o: ../nat/mips-linux-watch.c
$(COMPILE) $<
$(POSTCOMPILE)
+x86-linux.o: ../nat/x86-linux.c
+ $(COMPILE) $<
+ $(POSTCOMPILE)
aarch64.c : $(srcdir)/../regformats/aarch64.dat $(regdat_sh)
$(SHELL) $(regdat_sh) $(srcdir)/../regformats/aarch64.dat aarch64.c
diff --git a/gdb/gdbserver/configure.srv b/gdb/gdbserver/configure.srv
index 679fc9f..2c261dc 100644
--- a/gdb/gdbserver/configure.srv
+++ b/gdb/gdbserver/configure.srv
@@ -109,7 +109,7 @@ case "${target}" in
srv_xmlfiles="${srv_xmlfiles} $srv_amd64_linux_xmlfiles"
fi
srv_tgtobj="$srv_linux_obj linux-x86-low.o x86-low.o x86-dregs.o i387-fp.o"
- srv_tgtobj="${srv_tgtobj} linux-btrace.o"
+ srv_tgtobj="${srv_tgtobj} linux-btrace.o x86-linux.o"
srv_linux_usrregs=yes
srv_linux_regsets=yes
srv_linux_thread_db=yes
@@ -316,7 +316,7 @@ case "${target}" in
;;
x86_64-*-linux*) srv_regobj="$srv_amd64_linux_regobj $srv_i386_linux_regobj"
srv_tgtobj="$srv_linux_obj linux-x86-low.o x86-low.o x86-dregs.o i387-fp.o"
- srv_tgtobj="${srv_tgtobj} linux-btrace.o"
+ srv_tgtobj="${srv_tgtobj} linux-btrace.o x86-linux.o"
srv_xmlfiles="$srv_i386_linux_xmlfiles $srv_amd64_linux_xmlfiles"
srv_linux_usrregs=yes # This is for i386 progs.
srv_linux_regsets=yes
diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
index c9a9952..7b9df4c 100644
--- a/gdb/gdbserver/linux-low.c
+++ b/gdb/gdbserver/linux-low.c
@@ -146,6 +146,23 @@ ptid_of_lwp (struct lwp_info *lwp)
/* See nat/linux-nat.h. */
+void
+lwp_set_arch_private_info (struct lwp_info *lwp,
+ struct arch_lwp_info *info)
+{
+ lwp->arch_private = info;
+}
+
+/* See nat/linux-nat.h. */
+
+struct arch_lwp_info *
+lwp_arch_private_info (struct lwp_info *lwp)
+{
+ return lwp->arch_private;
+}
+
+/* See nat/linux-nat.h. */
+
int
lwp_is_stopped (struct lwp_info *lwp)
{
diff --git a/gdb/gdbserver/linux-x86-low.c b/gdb/gdbserver/linux-x86-low.c
index c8d50a1..e6f9638 100644
--- a/gdb/gdbserver/linux-x86-low.c
+++ b/gdb/gdbserver/linux-x86-low.c
@@ -37,6 +37,7 @@
#include "tdesc.h"
#include "tracepoint.h"
#include "ax.h"
+#include "nat/x86-linux.h"
#ifdef __x86_64__
/* Defined in auto-generated file amd64-linux.c. */
@@ -151,14 +152,6 @@ struct arch_process_info
struct x86_debug_reg_state debug_reg_state;
};
-/* Per-thread arch-specific data we want to keep. */
-
-struct arch_lwp_info
-{
- /* Non-zero if our copy differs from what's recorded in the thread. */
- int debug_registers_changed;
-};
-
#ifdef __x86_64__
/* Mapping between the general-purpose registers in `struct user'
@@ -565,7 +558,7 @@ update_debug_registers_callback (struct lwp_info *lwp, void *arg)
{
/* The actual update is done later just before resuming the lwp,
we just mark that the registers need updating. */
- lwp->arch_private->debug_registers_changed = 1;
+ lwp_set_debug_registers_changed (lwp, 1);
/* If the lwp isn't stopped, force it to momentarily pause, so
we can update its debug registers. */
@@ -746,11 +739,7 @@ x86_linux_new_process (void)
static void
x86_linux_new_thread (struct lwp_info *lwp)
{
- struct arch_lwp_info *info = XCNEW (struct arch_lwp_info);
-
- info->debug_registers_changed = 1;
-
- lwp->arch_private = info;
+ lwp_set_debug_registers_changed (lwp, 1);
}
/* See nat/x86-dregs.h. */
@@ -772,7 +761,7 @@ x86_linux_prepare_to_resume (struct lwp_info *lwp)
ptid_t ptid = ptid_of_lwp (lwp);
int clear_status = 0;
- if (lwp->arch_private->debug_registers_changed)
+ if (lwp_debug_registers_changed (lwp))
{
struct x86_debug_reg_state *state
= x86_debug_reg_state (ptid_get_pid (ptid));
@@ -795,7 +784,7 @@ x86_linux_prepare_to_resume (struct lwp_info *lwp)
if (state->dr_control_mirror != 0)
x86_linux_dr_set (ptid, DR_CONTROL, state->dr_control_mirror);
- lwp->arch_private->debug_registers_changed = 0;
+ lwp_set_debug_registers_changed (lwp, 0);
}
if (clear_status || lwp_is_stopped_by_watchpoint (lwp))
diff --git a/gdb/linux-nat.c b/gdb/linux-nat.c
index f51f7d3..a163d89 100644
--- a/gdb/linux-nat.c
+++ b/gdb/linux-nat.c
@@ -293,6 +293,23 @@ ptid_of_lwp (struct lwp_info *lwp)
/* See nat/linux-nat.h. */
+void
+lwp_set_arch_private_info (struct lwp_info *lwp,
+ struct arch_lwp_info *info)
+{
+ lwp->arch_private = info;
+}
+
+/* See nat/linux-nat.h. */
+
+struct arch_lwp_info *
+lwp_arch_private_info (struct lwp_info *lwp)
+{
+ return lwp->arch_private;
+}
+
+/* See nat/linux-nat.h. */
+
int
lwp_is_stopped (struct lwp_info *lwp)
{
diff --git a/gdb/nat/linux-nat.h b/gdb/nat/linux-nat.h
index 8dada8e..4534f01 100644
--- a/gdb/nat/linux-nat.h
+++ b/gdb/nat/linux-nat.h
@@ -21,6 +21,7 @@
#define LINUX_NAT_H
struct lwp_info;
+struct arch_lwp_info;
/* Unlike other extended result codes, WSTOPSIG (status) on
PTRACE_O_TRACESYSGOOD syscall events doesn't return SIGTRAP, but
@@ -44,6 +45,17 @@ extern struct lwp_info *iterate_over_lwps (ptid_t filter,
extern ptid_t ptid_of_lwp (struct lwp_info *lwp);
+/* Set the architecture-specific data of LWP. This function must be
+ provided by the client. */
+
+extern void lwp_set_arch_private_info (struct lwp_info *lwp,
+ struct arch_lwp_info *info);
+
+/* Return the architecture-specific data of LWP. This function must
+ be provided by the client. */
+
+extern struct arch_lwp_info *lwp_arch_private_info (struct lwp_info *lwp);
+
/* Return nonzero if LWP is stopped, zero otherwise. This function
must be provided by the client. */
diff --git a/gdb/nat/x86-linux.c b/gdb/nat/x86-linux.c
new file mode 100644
index 0000000..efeeab9
--- /dev/null
+++ b/gdb/nat/x86-linux.c
@@ -0,0 +1,57 @@
+/* Native-dependent code for GNU/Linux x86 (i386 and x86-64).
+
+ Copyright (C) 1999-2014 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 "common-defs.h"
+#include "x86-linux.h"
+
+/* Per-thread arch-specific data we want to keep. */
+
+struct arch_lwp_info
+{
+ /* Non-zero if our copy differs from what's recorded in the
+ thread. */
+ int debug_registers_changed;
+};
+
+/* See nat/x86-linux.h. */
+
+void
+lwp_set_debug_registers_changed (struct lwp_info *lwp, int value)
+{
+ if (lwp_arch_private_info (lwp) == NULL)
+ lwp_set_arch_private_info (lwp, XCNEW (struct arch_lwp_info));
+
+ lwp_arch_private_info (lwp)->debug_registers_changed = value;
+}
+
+/* See nat/x86-linux.h. */
+
+int
+lwp_debug_registers_changed (struct lwp_info *lwp)
+{
+ struct arch_lwp_info *info = lwp_arch_private_info (lwp);
+
+ /* NULL means either that this is the main thread still going
+ through the shell, or that no watchpoint has been set yet.
+ The debug registers are unchanged in either case. */
+ if (info == NULL)
+ return 0;
+
+ return info->debug_registers_changed;
+}
diff --git a/gdb/nat/x86-linux.h b/gdb/nat/x86-linux.h
new file mode 100644
index 0000000..6409898
--- /dev/null
+++ b/gdb/nat/x86-linux.h
@@ -0,0 +1,38 @@
+/* Native-dependent code for GNU/Linux x86 (i386 and x86-64).
+
+ Copyright (C) 1999-2014 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/>. */
+
+#ifndef X86_LINUX_H
+#define X86_LINUX_H
+
+#include "nat/linux-nat.h"
+
+/* Set whether our local mirror of LWP's debug registers has been
+ changed since the values were last written to the thread. Nonzero
+ indicates that a change has been made, zero indicates no change. */
+
+extern void lwp_set_debug_registers_changed (struct lwp_info *lwp,
+ int value);
+
+/* Return nonzero if our local mirror of LWP's debug registers has
+ been changed since the values were last written to the thread,
+ zero otherwise. */
+
+extern int lwp_debug_registers_changed (struct lwp_info *lwp);
+
+#endif /* X86_LINUX_H */
diff --git a/gdb/x86-linux-nat.c b/gdb/x86-linux-nat.c
index 3c96740..237f4e4 100644
--- a/gdb/x86-linux-nat.c
+++ b/gdb/x86-linux-nat.c
@@ -37,14 +37,7 @@
#endif
#include "x86-xstate.h"
#include "nat/linux-btrace.h"
-
-/* Per-thread arch-specific data we want to keep. */
-
-struct arch_lwp_info
-{
- /* Non-zero if our copy differs from what's recorded in the thread. */
- int debug_registers_changed;
-};
+#include "nat/x86-linux.h"
/* Does the current host support PTRACE_GETREGSET? */
int have_ptrace_getregset = -1;
@@ -122,12 +115,9 @@ x86_linux_dr_get_status (void)
static int
update_debug_registers_callback (struct lwp_info *lwp, void *arg)
{
- if (lwp->arch_private == NULL)
- lwp->arch_private = XCNEW (struct arch_lwp_info);
-
/* The actual update is done later just before resuming the lwp, we
just mark that the registers need updating. */
- lwp->arch_private->debug_registers_changed = 1;
+ lwp_set_debug_registers_changed (lwp, 1);
/* If the lwp isn't stopped, force it to momentarily pause, so we
can update its debug registers. */
@@ -170,13 +160,7 @@ x86_linux_prepare_to_resume (struct lwp_info *lwp)
ptid_t ptid = ptid_of_lwp (lwp);
int clear_status = 0;
- /* NULL means this is the main thread still going through the shell,
- or, no watchpoint has been set yet. In that case, there's
- nothing to do. */
- if (lwp->arch_private == NULL)
- return;
-
- if (lwp->arch_private->debug_registers_changed)
+ if (lwp_debug_registers_changed (lwp))
{
struct x86_debug_reg_state *state
= x86_debug_reg_state (ptid_get_pid (ptid));
@@ -211,7 +195,7 @@ x86_linux_prepare_to_resume (struct lwp_info *lwp)
if (state->dr_control_mirror != 0)
x86_linux_dr_set (ptid, DR_CONTROL, state->dr_control_mirror);
- lwp->arch_private->debug_registers_changed = 0;
+ lwp_set_debug_registers_changed (lwp, 0);
}
if (clear_status || lwp_is_stopped_by_watchpoint (lwp))
@@ -221,11 +205,7 @@ x86_linux_prepare_to_resume (struct lwp_info *lwp)
static void
x86_linux_new_thread (struct lwp_info *lp)
{
- struct arch_lwp_info *info = XCNEW (struct arch_lwp_info);
-
- info->debug_registers_changed = 1;
-
- lp->arch_private = info;
+ lwp_set_debug_registers_changed (lp, 1);
}
--
1.7.1
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