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[PATCH] Make inf_ptrace_trad Linux-only, move to separate file
- From: Pedro Alves <palves at redhat dot com>
- To: gdb-patches at sourceware dot org
- Date: Thu, 12 Apr 2018 18:47:22 +0100
- Subject: [PATCH] Make inf_ptrace_trad Linux-only, move to separate file
There are only two inf_ptrace_trad_target users, MIPS GNU/Linux and
Alpha GNU/Linux. They both call it via linux_trad_target.
Move this code out of inf-ptrace.c to a GNU/Linux-specific new file.
Making this code be GNU/Linux-specific simplifies C++ification of
target_ops, because we can make the trad target inherit linux_nat
instead of inheriting inf_ptrace. That'll be visible in a later patch.
Note this makes linux_target_install_ops an extern function, but that
is temporary -- the function will disappear once target_ops is made a
C++ class with virtual methods, later in the series. Also, I did not
rename the functions in the new file for a similar reason. They'll be
renamed again anyway in a couple of patches.
gdb/ChangeLog:
yyyy-mm-dd Pedro Alves <palves@redhat.com>
* alpha-linux-nat.c: Include "linux-nat-trad.h" instead of
"linux-nat.h".
* configure.nat (alpha-linux, linux-mips): Add linux-nat-trad.o.
* inf-ptrace.c (inf_ptrace_register_u_offset)
(inf_ptrace_fetch_register, inf_ptrace_fetch_registers)
(inf_ptrace_store_register, inf_ptrace_store_registers)
(inf_ptrace_trad_target): Move to ...
* linux-nat-trad.c: ... this new file.
* linux-nat-trad.h: New file.
* linux-nat.c (linux_target_install_ops): Make extern.
(linux_trad_target): Delete.
* linux-nat.h (linux_trad_target): Delete declaration.
(linux_target_install_ops): Declare.
* mips-linux-nat.c: Include "linux-nat-trad.h" instead of
"linux-nat.h".
---
gdb/alpha-linux-nat.c | 2 +-
gdb/configure.nat | 6 +-
gdb/inf-ptrace.c | 135 ------------------------------------------
gdb/linux-nat-trad.c | 160 ++++++++++++++++++++++++++++++++++++++++++++++++++
gdb/linux-nat-trad.h | 30 ++++++++++
gdb/linux-nat.c | 13 +---
gdb/linux-nat.h | 7 +--
gdb/mips-linux-nat.c | 2 +-
8 files changed, 199 insertions(+), 156 deletions(-)
create mode 100644 gdb/linux-nat-trad.c
create mode 100644 gdb/linux-nat-trad.h
diff --git a/gdb/alpha-linux-nat.c b/gdb/alpha-linux-nat.c
index 7afce023af..8d46af4176 100644
--- a/gdb/alpha-linux-nat.c
+++ b/gdb/alpha-linux-nat.c
@@ -19,7 +19,7 @@
#include "defs.h"
#include "target.h"
#include "regcache.h"
-#include "linux-nat.h"
+#include "linux-nat-trad.h"
#include "alpha-tdep.h"
diff --git a/gdb/configure.nat b/gdb/configure.nat
index 8e14892722..cefc6692c1 100644
--- a/gdb/configure.nat
+++ b/gdb/configure.nat
@@ -115,7 +115,7 @@ case ${gdb_host} in
case ${gdb_host_cpu} in
alpha)
# Host: Little-endian Alpha running Linux
- NATDEPFILES="${NATDEPFILES} alpha-linux-nat.o"
+ NATDEPFILES="${NATDEPFILES} linux-nat-trad.o alpha-linux-nat.o"
# doublest.c currently assumes some properties of FP arithmetic
# on the host which require this.
MH_CFLAGS='-mieee'
@@ -255,8 +255,8 @@ case ${gdb_host} in
;;
mips)
# Host: Linux/MIPS
- NATDEPFILES="${NATDEPFILES} mips-linux-nat.o \
- mips-linux-watch.o"
+ NATDEPFILES="${NATDEPFILES} linux-nat-trad.o \
+ mips-linux-nat.o mips-linux-watch.o"
;;
pa)
# Host: Hewlett-Packard PA-RISC machine, running Linux
diff --git a/gdb/inf-ptrace.c b/gdb/inf-ptrace.c
index e20388658f..7c4d597be9 100644
--- a/gdb/inf-ptrace.c
+++ b/gdb/inf-ptrace.c
@@ -699,138 +699,3 @@ inf_ptrace_target (void)
return t;
}
-
-/* Pointer to a function that returns the offset within the user area
- where a particular register is stored. */
-static CORE_ADDR (*inf_ptrace_register_u_offset)(struct gdbarch *, int, int);
-
-/* Fetch register REGNUM from the inferior. */
-
-static void
-inf_ptrace_fetch_register (struct regcache *regcache, int regnum)
-{
- struct gdbarch *gdbarch = regcache->arch ();
- CORE_ADDR addr;
- size_t size;
- PTRACE_TYPE_RET *buf;
- pid_t pid;
- int i;
-
- /* This isn't really an address, but ptrace thinks of it as one. */
- addr = inf_ptrace_register_u_offset (gdbarch, regnum, 0);
- if (addr == (CORE_ADDR)-1
- || gdbarch_cannot_fetch_register (gdbarch, regnum))
- {
- regcache_raw_supply (regcache, regnum, NULL);
- return;
- }
-
- pid = get_ptrace_pid (regcache_get_ptid (regcache));
-
- size = register_size (gdbarch, regnum);
- gdb_assert ((size % sizeof (PTRACE_TYPE_RET)) == 0);
- buf = (PTRACE_TYPE_RET *) alloca (size);
-
- /* Read the register contents from the inferior a chunk at a time. */
- for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
- {
- errno = 0;
- buf[i] = ptrace (PT_READ_U, pid, (PTRACE_TYPE_ARG3)(uintptr_t)addr, 0);
- if (errno != 0)
- error (_("Couldn't read register %s (#%d): %s."),
- gdbarch_register_name (gdbarch, regnum),
- regnum, safe_strerror (errno));
-
- addr += sizeof (PTRACE_TYPE_RET);
- }
- regcache_raw_supply (regcache, regnum, buf);
-}
-
-/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
- for all registers. */
-
-static void
-inf_ptrace_fetch_registers (struct target_ops *ops,
- struct regcache *regcache, int regnum)
-{
- if (regnum == -1)
- for (regnum = 0;
- regnum < gdbarch_num_regs (regcache->arch ());
- regnum++)
- inf_ptrace_fetch_register (regcache, regnum);
- else
- inf_ptrace_fetch_register (regcache, regnum);
-}
-
-/* Store register REGNUM into the inferior. */
-
-static void
-inf_ptrace_store_register (const struct regcache *regcache, int regnum)
-{
- struct gdbarch *gdbarch = regcache->arch ();
- CORE_ADDR addr;
- size_t size;
- PTRACE_TYPE_RET *buf;
- pid_t pid;
- int i;
-
- /* This isn't really an address, but ptrace thinks of it as one. */
- addr = inf_ptrace_register_u_offset (gdbarch, regnum, 1);
- if (addr == (CORE_ADDR)-1
- || gdbarch_cannot_store_register (gdbarch, regnum))
- return;
-
- pid = get_ptrace_pid (regcache_get_ptid (regcache));
-
- size = register_size (gdbarch, regnum);
- gdb_assert ((size % sizeof (PTRACE_TYPE_RET)) == 0);
- buf = (PTRACE_TYPE_RET *) alloca (size);
-
- /* Write the register contents into the inferior a chunk at a time. */
- regcache_raw_collect (regcache, regnum, buf);
- for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
- {
- errno = 0;
- ptrace (PT_WRITE_U, pid, (PTRACE_TYPE_ARG3)(uintptr_t)addr, buf[i]);
- if (errno != 0)
- error (_("Couldn't write register %s (#%d): %s."),
- gdbarch_register_name (gdbarch, regnum),
- regnum, safe_strerror (errno));
-
- addr += sizeof (PTRACE_TYPE_RET);
- }
-}
-
-/* Store register REGNUM back into the inferior. If REGNUM is -1, do
- this for all registers. */
-
-static void
-inf_ptrace_store_registers (struct target_ops *ops,
- struct regcache *regcache, int regnum)
-{
- if (regnum == -1)
- for (regnum = 0;
- regnum < gdbarch_num_regs (regcache->arch ());
- regnum++)
- inf_ptrace_store_register (regcache, regnum);
- else
- inf_ptrace_store_register (regcache, regnum);
-}
-
-/* Create a "traditional" ptrace target. REGISTER_U_OFFSET should be
- a function returning the offset within the user area where a
- particular register is stored. */
-
-struct target_ops *
-inf_ptrace_trad_target (CORE_ADDR (*register_u_offset)
- (struct gdbarch *, int, int))
-{
- struct target_ops *t = inf_ptrace_target();
-
- gdb_assert (register_u_offset);
- inf_ptrace_register_u_offset = register_u_offset;
- t->to_fetch_registers = inf_ptrace_fetch_registers;
- t->to_store_registers = inf_ptrace_store_registers;
-
- return t;
-}
diff --git a/gdb/linux-nat-trad.c b/gdb/linux-nat-trad.c
new file mode 100644
index 0000000000..75130be0f4
--- /dev/null
+++ b/gdb/linux-nat-trad.c
@@ -0,0 +1,160 @@
+/* Generic GNU/Linux target using traditional ptrace register access.
+
+ Copyright (C) 1988-2018 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 "linux-nat-trad.h"
+
+#include "nat/gdb_ptrace.h"
+#include "inf-ptrace.h"
+
+/* Pointer to a function that returns the offset within the user area
+ where a particular register is stored. */
+static CORE_ADDR (*inf_ptrace_register_u_offset)(struct gdbarch *, int, int);
+
+/* Fetch register REGNUM from the inferior. */
+
+static void
+inf_ptrace_fetch_register (struct regcache *regcache, int regnum)
+{
+ struct gdbarch *gdbarch = regcache->arch ();
+ CORE_ADDR addr;
+ size_t size;
+ PTRACE_TYPE_RET *buf;
+ pid_t pid;
+ int i;
+
+ /* This isn't really an address, but ptrace thinks of it as one. */
+ addr = inf_ptrace_register_u_offset (gdbarch, regnum, 0);
+ if (addr == (CORE_ADDR)-1
+ || gdbarch_cannot_fetch_register (gdbarch, regnum))
+ {
+ regcache_raw_supply (regcache, regnum, NULL);
+ return;
+ }
+
+ pid = get_ptrace_pid (regcache_get_ptid (regcache));
+
+ size = register_size (gdbarch, regnum);
+ gdb_assert ((size % sizeof (PTRACE_TYPE_RET)) == 0);
+ buf = (PTRACE_TYPE_RET *) alloca (size);
+
+ /* Read the register contents from the inferior a chunk at a time. */
+ for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
+ {
+ errno = 0;
+ buf[i] = ptrace (PT_READ_U, pid, (PTRACE_TYPE_ARG3)(uintptr_t)addr, 0);
+ if (errno != 0)
+ error (_("Couldn't read register %s (#%d): %s."),
+ gdbarch_register_name (gdbarch, regnum),
+ regnum, safe_strerror (errno));
+
+ addr += sizeof (PTRACE_TYPE_RET);
+ }
+ regcache_raw_supply (regcache, regnum, buf);
+}
+
+/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
+ for all registers. */
+
+static void
+inf_ptrace_fetch_registers (struct target_ops *ops,
+ struct regcache *regcache, int regnum)
+{
+ if (regnum == -1)
+ for (regnum = 0;
+ regnum < gdbarch_num_regs (regcache->arch ());
+ regnum++)
+ inf_ptrace_fetch_register (regcache, regnum);
+ else
+ inf_ptrace_fetch_register (regcache, regnum);
+}
+
+/* Store register REGNUM into the inferior. */
+
+static void
+inf_ptrace_store_register (const struct regcache *regcache, int regnum)
+{
+ struct gdbarch *gdbarch = regcache->arch ();
+ CORE_ADDR addr;
+ size_t size;
+ PTRACE_TYPE_RET *buf;
+ pid_t pid;
+ int i;
+
+ /* This isn't really an address, but ptrace thinks of it as one. */
+ addr = inf_ptrace_register_u_offset (gdbarch, regnum, 1);
+ if (addr == (CORE_ADDR)-1
+ || gdbarch_cannot_store_register (gdbarch, regnum))
+ return;
+
+ pid = get_ptrace_pid (regcache_get_ptid (regcache));
+
+ size = register_size (gdbarch, regnum);
+ gdb_assert ((size % sizeof (PTRACE_TYPE_RET)) == 0);
+ buf = (PTRACE_TYPE_RET *) alloca (size);
+
+ /* Write the register contents into the inferior a chunk at a time. */
+ regcache_raw_collect (regcache, regnum, buf);
+ for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
+ {
+ errno = 0;
+ ptrace (PT_WRITE_U, pid, (PTRACE_TYPE_ARG3)(uintptr_t)addr, buf[i]);
+ if (errno != 0)
+ error (_("Couldn't write register %s (#%d): %s."),
+ gdbarch_register_name (gdbarch, regnum),
+ regnum, safe_strerror (errno));
+
+ addr += sizeof (PTRACE_TYPE_RET);
+ }
+}
+
+/* Store register REGNUM back into the inferior. If REGNUM is -1, do
+ this for all registers. */
+
+static void
+inf_ptrace_store_registers (struct target_ops *ops,
+ struct regcache *regcache, int regnum)
+{
+ if (regnum == -1)
+ for (regnum = 0;
+ regnum < gdbarch_num_regs (regcache->arch ());
+ regnum++)
+ inf_ptrace_store_register (regcache, regnum);
+ else
+ inf_ptrace_store_register (regcache, regnum);
+}
+
+/* Create a "traditional" Linux/ptrace target. REGISTER_U_OFFSET
+ should be a function returning the offset within the user area
+ where a particular register is stored. */
+
+struct target_ops *
+linux_trad_target (CORE_ADDR (*register_u_offset)(struct gdbarch *, int, int))
+{
+ struct target_ops *t = inf_ptrace_target();
+
+ gdb_assert (register_u_offset);
+ inf_ptrace_register_u_offset = register_u_offset;
+ t->to_fetch_registers = inf_ptrace_fetch_registers;
+ t->to_store_registers = inf_ptrace_store_registers;
+
+ linux_target_install_ops (t);
+
+ return t;
+}
diff --git a/gdb/linux-nat-trad.h b/gdb/linux-nat-trad.h
new file mode 100644
index 0000000000..3b4a6c8595
--- /dev/null
+++ b/gdb/linux-nat-trad.h
@@ -0,0 +1,30 @@
+/* Generic GNU/Linux target using traditional ptrace register access.
+
+ Copyright (C) 2000-2018 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 LINUX_NAT_TRAD_H
+#define LINUX_NAT_TRAD_H
+
+#include "linux-nat.h"
+
+/* Create a generic GNU/Linux target using traditional
+ ptrace register access. */
+struct target_ops *linux_trad_target
+ (CORE_ADDR (*register_u_offset)(struct gdbarch *, int, int));
+
+#endif /* LINUX_NAT_TRAD_H */
diff --git a/gdb/linux-nat.c b/gdb/linux-nat.c
index 5a4abb1834..c23f83e057 100644
--- a/gdb/linux-nat.c
+++ b/gdb/linux-nat.c
@@ -4338,7 +4338,7 @@ linux_child_static_tracepoint_markers_by_strid (struct target_ops *self,
/* Create a prototype generic GNU/Linux target. The client can override
it with local methods. */
-static void
+void
linux_target_install_ops (struct target_ops *t)
{
t->to_insert_fork_catchpoint = linux_child_insert_fork_catchpoint;
@@ -4371,17 +4371,6 @@ linux_target (void)
return t;
}
-struct target_ops *
-linux_trad_target (CORE_ADDR (*register_u_offset)(struct gdbarch *, int, int))
-{
- struct target_ops *t;
-
- t = inf_ptrace_trad_target (register_u_offset);
- linux_target_install_ops (t);
-
- return t;
-}
-
/* target_is_async_p implementation. */
static int
diff --git a/gdb/linux-nat.h b/gdb/linux-nat.h
index 9df3548c6b..03c2021911 100644
--- a/gdb/linux-nat.h
+++ b/gdb/linux-nat.h
@@ -153,10 +153,9 @@ extern void linux_unstop_all_lwps (void);
override it with local methods. */
struct target_ops * linux_target (void);
-/* Create a generic GNU/Linux target using traditional
- ptrace register access. */
-struct target_ops *
-linux_trad_target (CORE_ADDR (*register_u_offset)(struct gdbarch *, int, int));
+/* Make a prototype generic GNU/Linux target. The client can override
+ it with local methods. */
+void linux_target_install_ops (struct target_ops *t);
/* Register the customized GNU/Linux target. This should be used
instead of calling add_target directly. */
diff --git a/gdb/mips-linux-nat.c b/gdb/mips-linux-nat.c
index 68fd1f83c3..17e70b603b 100644
--- a/gdb/mips-linux-nat.c
+++ b/gdb/mips-linux-nat.c
@@ -24,7 +24,7 @@
#include "mips-tdep.h"
#include "target.h"
#include "regcache.h"
-#include "linux-nat.h"
+#include "linux-nat-trad.h"
#include "mips-linux-tdep.h"
#include "target-descriptions.h"
--
2.14.3