[PATCH 3/4] Add procfs_find_LDT_entry declaration (procfs.h).

[PATCH 3/4] Add procfs_find_LDT_entry declaration (procfs.h).

[Joel Brobecker]

Add a declaration for procfs_find_LDT_entry in order to prevent
a compiler warning about this function missing one. This also
helps making sure that declaration and definition remain consistent.

gdb/ChangeLog:

        * procfs.h (procfs_find_LDT_entry): Add declaration.
        * sol-thread.c (ps_lgetLDT): Delete local declaration of
        function procfs_find_LDT_entry.
---
 gdb/procfs.h     |    7 +++++++
 gdb/sol-thread.c |    1 -
 2 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/gdb/procfs.h b/gdb/procfs.h
index 8293322..9dbf531 100644
--- a/gdb/procfs.h
+++ b/gdb/procfs.h
@@ -34,3 +34,10 @@ extern void procfs_use_watchpoints (struct target_ops *t);
    'live' procinfo.  */
 
 extern ptid_t procfs_first_available (void);
+
+#if (defined(__i386__) || defined(__x86_64__)) && defined (sun)
+struct ssd;
+
+extern struct ssd *procfs_find_LDT_entry (ptid_t);
+#endif
+
diff --git a/gdb/sol-thread.c b/gdb/sol-thread.c
index 3577b5a..cd37615 100644
--- a/gdb/sol-thread.c
+++ b/gdb/sol-thread.c
@@ -1108,7 +1108,6 @@ ps_lgetLDT (gdb_ps_prochandle_t ph, lwpid_t lwpid,
 	    struct ssd *pldt)
 {
   /* NOTE: only used on Solaris, therefore OK to refer to procfs.c.  */
-  extern struct ssd *procfs_find_LDT_entry (ptid_t);
   struct ssd *ret;
 
   /* FIXME: can't I get the process ID from the prochandle or
-- 
1.6.5.rc2

Various build-related fixes for solaris

[Joel Brobecker]

Hello,

I noticed today that the GDB build on solaris breaks. The first
patch fixes the breakage. But while fixing it, I noticied that
there were still so "unused function" warnings.  Fixes with the
patches that follow.

I will wait a day or two, and then commit if there are no objections.

Thanks,
-- 
Joel

[PATCH 1/4] Fix declaration of proc_find_memory_regions

[Joel Brobecker]

This function is used as a target_ops callback. The function
implemention was recently changed, but the declaration wasn't
updated accordingly.

This fixes a build failure on Solaris.

gdb/ChangeLog:

        * procfs.c (proc_find_memory_regions): Fix declaration.
---
 gdb/procfs.c |    6 +-----
 1 files changed, 1 insertions(+), 5 deletions(-)

diff --git a/gdb/procfs.c b/gdb/procfs.c
index ee2b123..3583e8e 100644
--- a/gdb/procfs.c
+++ b/gdb/procfs.c
@@ -141,11 +141,7 @@ static int procfs_thread_alive (struct target_ops *ops, ptid_t);
 static void procfs_find_new_threads (struct target_ops *ops);
 static char *procfs_pid_to_str (struct target_ops *, ptid_t);
 
-static int proc_find_memory_regions (int (*) (CORE_ADDR,
-					      unsigned long,
-					      int, int, int,
-					      void *),
-				     void *);
+static int proc_find_memory_regions (find_memory_region_ftype, void *);
 
 static char * procfs_make_note_section (bfd *, int *);
 
-- 
1.6.5.rc2

[PATCH 2/4] Make procfs.c:proc_get_LDT_entry static

[Joel Brobecker]

This function is not used outside of procfs.c.

gdb/ChangeLog:

        * procfs.c (proc_get_LDT_entry): Make static.
---
 gdb/procfs.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/gdb/procfs.c b/gdb/procfs.c
index 3583e8e..6ba5bd1 100644
--- a/gdb/procfs.c
+++ b/gdb/procfs.c
@@ -2516,7 +2516,7 @@ proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags)
    register for the LWP that we're interested in.  Returns the
    matching ssh struct (LDT entry).  */
 
-struct ssd *
+static struct ssd *
 proc_get_LDT_entry (procinfo *pi, int key)
 {
   static struct ssd *ldt_entry = NULL;
-- 
1.6.5.rc2

[PATCH 4/4] Delete unused functions in sol-thread.c.

[Joel Brobecker]

gdb/ChangeLog:

        * sol-thread.c (ps_lgetxregsize, ps_lgetxregs, ps_lsetxregs):
        Delete.
---
 gdb/sol-thread.c |   74 ------------------------------------------------------
 1 files changed, 0 insertions(+), 74 deletions(-)

diff --git a/gdb/sol-thread.c b/gdb/sol-thread.c
index cd37615..585a77f 100644
--- a/gdb/sol-thread.c
+++ b/gdb/sol-thread.c
@@ -959,80 +959,6 @@ ps_plog (const char *fmt, ...)
   vfprintf_filtered (gdb_stderr, fmt, args);
 }
 
-/* Get size of extra register set.  Currently a noop.  */
-
-ps_err_e
-ps_lgetxregsize (gdb_ps_prochandle_t ph, lwpid_t lwpid, int *xregsize)
-{
-#if 0
-  int lwp_fd;
-  int regsize;
-  ps_err_e val;
-
-  val = get_lwp_fd (ph, lwpid, &lwp_fd);
-  if (val != PS_OK)
-    return val;
-
-  if (ioctl (lwp_fd, PIOCGXREGSIZE, &regsize))
-    {
-      if (errno == EINVAL)
-	return PS_NOFREGS;	/* XXX Wrong code, but this is the closest
-				   thing in proc_service.h  */
-
-      print_sys_errmsg ("ps_lgetxregsize (): PIOCGXREGSIZE", errno);
-      return PS_ERR;
-    }
-#endif
-
-  return PS_OK;
-}
-
-/* Get extra register set.  Currently a noop.  */
-
-ps_err_e
-ps_lgetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset)
-{
-#if 0
-  int lwp_fd;
-  ps_err_e val;
-
-  val = get_lwp_fd (ph, lwpid, &lwp_fd);
-  if (val != PS_OK)
-    return val;
-
-  if (ioctl (lwp_fd, PIOCGXREG, xregset))
-    {
-      print_sys_errmsg ("ps_lgetxregs (): PIOCGXREG", errno);
-      return PS_ERR;
-    }
-#endif
-
-  return PS_OK;
-}
-
-/* Set extra register set.  Currently a noop.  */
-
-ps_err_e
-ps_lsetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset)
-{
-#if 0
-  int lwp_fd;
-  ps_err_e val;
-
-  val = get_lwp_fd (ph, lwpid, &lwp_fd);
-  if (val != PS_OK)
-    return val;
-
-  if (ioctl (lwp_fd, PIOCSXREG, xregset))
-    {
-      print_sys_errmsg ("ps_lsetxregs (): PIOCSXREG", errno);
-      return PS_ERR;
-    }
-#endif
-
-  return PS_OK;
-}
-
 /* Get floating-point registers for LWP.  */
 
 ps_err_e
-- 
1.6.5.rc2

Re: [PATCH 4/4] Delete unused functions in sol-thread.c.

[Pedro Alves]

Can you expand on what "unused" means?

The Solaris man page I peeked at says these functions are SPARC only.
Does this mean that current SPARC Solaris libthread_db doesn't call them
after all?  What about older versions?

-- 
Pedro Alves

Re: [PATCH 4/4] Delete unused functions in sol-thread.c.

[Joel Brobecker]

[-- Attachment #1: Type: text/plain, Size: 1409 bytes --]

> Can you expand on what "unused" means?

Good question!

> The Solaris man page I peeked at says these functions are SPARC only.
> Does this mean that current SPARC Solaris libthread_db doesn't call them
> after all?  What about older versions?

It took me a while to investigate this part because our sparc-solaris
machines are just sooooo sloooooowwww. Initially, I thought it might
have been something related to OS versions, but the answer was right
there in front of me, if I had tested the patch on *sparc* solaris
(in addition to *x86* solaris).

Basically, /usr/include/proc_service.h:

    #if defined(__sparc) || defined(__sparcv9)
    extern ps_err_e ps_lgetxregsize(struct ps_prochandle *, lwpid_t, int *);
    extern ps_err_e ps_lgetxregs(struct ps_prochandle *, lwpid_t, caddr_t);
    extern ps_err_e ps_lsetxregs(struct ps_prochandle *, lwpid_t, caddr_t);
    #endif

In other words, these routines are used on sparc-solaris, while they
are not expected on x86-solaris.

I propose we start with the following patch (0001-[...].patch),
and while at it, we remove all the commented out code (0002-[...]).
This is a stop-gap measure to allow the build to work with -Werror
on x86-solaris.

And the next step I propose, to finish the work, is to move these
functions to their own file (sol-sparc-thread.c). We would then
only build that file for sparc-solaris native GDB.

WDYT?

Thanks,
-- 
Joel

[-- Attachment #2: 0001-sol-thread.c-conditionalize-some-sparc-specific-libt.patch --]
[-- Type: text/x-diff, Size: 1051 bytes --]

From 01b5ab3a4c11703220543e16e21f140f2eaf33e2 Mon Sep 17 00:00:00 2001
From: Joel Brobecker <brobecker@adacore.com>
Date: Thu, 20 Sep 2012 17:28:01 -0400
Subject: [PATCH 1/2] sol-thread.c: conditionalize some sparc-specific libthread_db functions.

gdb/ChangeLog:

        * sol-thread.c (ps_lgetxregsize, ps_lgetxregs, ps_lsetxregs):
        Enable this code for sparc hosts only.
---
 gdb/sol-thread.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/gdb/sol-thread.c b/gdb/sol-thread.c
index 78dcec3..323a122 100644
--- a/gdb/sol-thread.c
+++ b/gdb/sol-thread.c
@@ -984,6 +984,8 @@ ps_plog (const char *fmt, ...)
   vfprintf_filtered (gdb_stderr, fmt, args);
 }
 
+#if defined(__sparc) || defined(__sparcv9)
+
 /* Get size of extra register set.  Currently a noop.  */
 
 ps_err_e
@@ -1058,6 +1060,8 @@ ps_lsetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset)
   return PS_OK;
 }
 
+#endif /* defined(__sparc) || defined(__sparcv9) */
+
 /* Get floating-point registers for LWP.  */
 
 ps_err_e
-- 
1.7.0.4


[-- Attachment #3: 0002-sol-thread.c-Remove-if-0-ed-code.patch --]
[-- Type: text/x-diff, Size: 2143 bytes --]

From 5ecc0d7df0ea8f2d53304326147a2a82220de2e8 Mon Sep 17 00:00:00 2001
From: Joel Brobecker <brobecker@adacore.com>
Date: Thu, 20 Sep 2012 17:29:35 -0400
Subject: [PATCH 2/2] sol-thread.c: Remove #if 0-ed code.

gdb/ChangeLog:

        * sol-thread.c (ps_lgetxregsize, ps_lgetxregs, ps_lsetxregs):
        Remove commented-out code.
---
 gdb/sol-thread.c |   50 --------------------------------------------------
 1 files changed, 0 insertions(+), 50 deletions(-)

diff --git a/gdb/sol-thread.c b/gdb/sol-thread.c
index 323a122..b86079f 100644
--- a/gdb/sol-thread.c
+++ b/gdb/sol-thread.c
@@ -991,26 +991,6 @@ ps_plog (const char *fmt, ...)
 ps_err_e
 ps_lgetxregsize (gdb_ps_prochandle_t ph, lwpid_t lwpid, int *xregsize)
 {
-#if 0
-  int lwp_fd;
-  int regsize;
-  ps_err_e val;
-
-  val = get_lwp_fd (ph, lwpid, &lwp_fd);
-  if (val != PS_OK)
-    return val;
-
-  if (ioctl (lwp_fd, PIOCGXREGSIZE, &regsize))
-    {
-      if (errno == EINVAL)
-	return PS_NOFREGS;	/* XXX Wrong code, but this is the closest
-				   thing in proc_service.h  */
-
-      print_sys_errmsg ("ps_lgetxregsize (): PIOCGXREGSIZE", errno);
-      return PS_ERR;
-    }
-#endif
-
   return PS_OK;
 }
 
@@ -1019,21 +999,6 @@ ps_lgetxregsize (gdb_ps_prochandle_t ph, lwpid_t lwpid, int *xregsize)
 ps_err_e
 ps_lgetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset)
 {
-#if 0
-  int lwp_fd;
-  ps_err_e val;
-
-  val = get_lwp_fd (ph, lwpid, &lwp_fd);
-  if (val != PS_OK)
-    return val;
-
-  if (ioctl (lwp_fd, PIOCGXREG, xregset))
-    {
-      print_sys_errmsg ("ps_lgetxregs (): PIOCGXREG", errno);
-      return PS_ERR;
-    }
-#endif
-
   return PS_OK;
 }
 
@@ -1042,21 +1007,6 @@ ps_lgetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset)
 ps_err_e
 ps_lsetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset)
 {
-#if 0
-  int lwp_fd;
-  ps_err_e val;
-
-  val = get_lwp_fd (ph, lwpid, &lwp_fd);
-  if (val != PS_OK)
-    return val;
-
-  if (ioctl (lwp_fd, PIOCSXREG, xregset))
-    {
-      print_sys_errmsg ("ps_lsetxregs (): PIOCSXREG", errno);
-      return PS_ERR;
-    }
-#endif
-
   return PS_OK;
 }
 
-- 
1.7.0.4

Re: [PATCH 4/4] Delete unused functions in sol-thread.c.

[Joel Brobecker]

> And the next step I propose, to finish the work, is to move these
> functions to their own file (sol-sparc-thread.c). We would then
> only build that file for sparc-solaris native GDB.

And attached is the final step. I can merge all 3 patches into
a single delete-commented-out-code-and-move-to-sol-sparc-thread
patch. Either way works for me.

Tested on both x86-solaris (2.10) and sparc-solaris (2.9).
How does it look?

Thanks,
-- 
Joel

Re: [PATCH 4/4] Delete unused functions in sol-thread.c.

[Joel Brobecker]

[-- Attachment #1: Type: text/plain, Size: 74 bytes --]

> > And the next step I propose, to finish the work,

ENOPATCH.

-- 
Joel

[-- Attachment #2: 0003-New-unit-sol-sparc-thread.c-extracted-from-sol-threa.patch --]
[-- Type: text/x-diff, Size: 4865 bytes --]

From 4cb2459b250fa92cfcdcd40e421ac1c8dbea5368 Mon Sep 17 00:00:00 2001
From: Joel Brobecker <brobecker@adacore.com>
Date: Thu, 20 Sep 2012 18:17:22 -0400
Subject: [PATCH 3/3] New unit sol-sparc-thread.c extracted from sol-thread.c

Moving some sparc-specific routines out of sol-thread.c into their
own (new) file.

gdb/ChangeLog:

        * sol-thread.c (ps_lgetxregsize, ps_lgetxregs, ps_lsetxregs):
        Move these functions to sol-sparc-thread.c.
        * sol-sparc-thread.c: New file.
        * configure.ac: Add sol-sparc-thread.o to CONFIG_OBS and
        sol-sparc-thread.c to CONFIG_SRCS for sparc-solaris native
        configurations.
        * configure: Regenerate.
---
 gdb/configure          |    7 +++++++
 gdb/configure.ac       |    7 +++++++
 gdb/sol-sparc-thread.c |   43 +++++++++++++++++++++++++++++++++++++++++++
 gdb/sol-thread.c       |   28 ----------------------------
 4 files changed, 57 insertions(+), 28 deletions(-)
 create mode 100644 gdb/sol-sparc-thread.c

diff --git a/gdb/configure b/gdb/configure
index d9d0aaa..7d14003 100755
--- a/gdb/configure
+++ b/gdb/configure
@@ -12534,6 +12534,13 @@ $as_echo "#define HAVE_THREAD_DB_LIB 1" >>confdefs.h
 
          CONFIG_OBS="${CONFIG_OBS} sol-thread.o"
          CONFIG_SRCS="${CONFIG_SRCS} sol-thread.c"
+         # On SPARC CPUs, we also need to build sol-sparc-thread.
+         case ${host_cpu} in
+           sparc*)
+             CONFIG_OBS="${CONFIG_OBS} sol-sparc-thread.o"
+             CONFIG_SRCS="${CONFIG_SRCS} sol-sparc-thread.c"
+             ;;
+         esac
          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5
 $as_echo_n "checking for dlopen in -ldl... " >&6; }
 if test "${ac_cv_lib_dl_dlopen+set}" = set; then :
diff --git a/gdb/configure.ac b/gdb/configure.ac
index 6069c08..15de347 100644
--- a/gdb/configure.ac
+++ b/gdb/configure.ac
@@ -1781,6 +1781,13 @@ if test ${build} = ${host} -a ${host} = ${target} ; then
          [Define if using Solaris thread debugging.])
          CONFIG_OBS="${CONFIG_OBS} sol-thread.o"
          CONFIG_SRCS="${CONFIG_SRCS} sol-thread.c"
+         # On SPARC CPUs, we also need to build sol-sparc-thread.
+         case ${host_cpu} in
+           sparc*)
+             CONFIG_OBS="${CONFIG_OBS} sol-sparc-thread.o"
+             CONFIG_SRCS="${CONFIG_SRCS} sol-sparc-thread.c"
+             ;;
+         esac
          AC_CHECK_LIB(dl, dlopen)
 	 CONFIG_LDFLAGS="${CONFIG_LDFLAGS} $RDYNAMIC"
 	 # Sun randomly tweaked the prototypes in <proc_service.h>
diff --git a/gdb/sol-sparc-thread.c b/gdb/sol-sparc-thread.c
new file mode 100644
index 0000000..6b7c49d
--- /dev/null
+++ b/gdb/sol-sparc-thread.c
@@ -0,0 +1,43 @@
+/* Copyright (C) 2012 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 <proc_service.h>
+
+/* Get size of extra register set.  Currently a noop.  */
+
+ps_err_e
+ps_lgetxregsize (struct ps_prochandle *ph, lwpid_t lwpid, int *xregsize)
+{
+  return PS_OK;
+}
+
+/* Get extra register set.  Currently a noop.  */
+
+ps_err_e
+ps_lgetxregs (struct ps_prochandle *ph, lwpid_t lwpid, caddr_t xregset)
+{
+  return PS_OK;
+}
+
+/* Set extra register set.  Currently a noop.  */
+
+ps_err_e
+ps_lsetxregs (struct ps_prochandle *ph, lwpid_t lwpid, caddr_t xregset)
+{
+  return PS_OK;
+}
diff --git a/gdb/sol-thread.c b/gdb/sol-thread.c
index b86079f..06a2fb6 100644
--- a/gdb/sol-thread.c
+++ b/gdb/sol-thread.c
@@ -984,34 +984,6 @@ ps_plog (const char *fmt, ...)
   vfprintf_filtered (gdb_stderr, fmt, args);
 }
 
-#if defined(__sparc) || defined(__sparcv9)
-
-/* Get size of extra register set.  Currently a noop.  */
-
-ps_err_e
-ps_lgetxregsize (gdb_ps_prochandle_t ph, lwpid_t lwpid, int *xregsize)
-{
-  return PS_OK;
-}
-
-/* Get extra register set.  Currently a noop.  */
-
-ps_err_e
-ps_lgetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset)
-{
-  return PS_OK;
-}
-
-/* Set extra register set.  Currently a noop.  */
-
-ps_err_e
-ps_lsetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset)
-{
-  return PS_OK;
-}
-
-#endif /* defined(__sparc) || defined(__sparcv9) */
-
 /* Get floating-point registers for LWP.  */
 
 ps_err_e
-- 
1.7.0.4

Re: [PATCH 3/4] Add procfs_find_LDT_entry declaration (procfs.h).

[Jan Kratochvil]

On Thu, 20 Sep 2012 18:34:00 +0200, Joel Brobecker wrote:
> --- a/gdb/procfs.h
> +++ b/gdb/procfs.h
> @@ -34,3 +34,10 @@ extern void procfs_use_watchpoints (struct target_ops *t);
>     'live' procinfo.  */
>  
>  extern ptid_t procfs_first_available (void);
> +
> +#if (defined(__i386__) || defined(__x86_64__)) && defined (sun)

The first two defined keywords should have a white space.


Jan

Re: [PATCH 4/4] Delete unused functions in sol-thread.c.

[Pedro Alves]

On 09/20/2012 10:43 PM, Joel Brobecker wrote:

> gdb/ChangeLog:
> 
>         * sol-thread.c (ps_lgetxregsize, ps_lgetxregs, ps_lsetxregs):
>         Enable this code for sparc hosts only.

Looks good to me, with

> +#if defined(__sparc) || defined(__sparcv9)

space before parens.

> gdb/ChangeLog:
> 
>         * sol-thread.c (ps_lgetxregsize, ps_lgetxregs, ps_lsetxregs):
>         Remove commented-out code.

There's more '#if 0'-related code in the file.  I think that if we're
removing these, we should get rid of all of it.

I found it curious that
http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/lib/libc_db/common/thread_db.c
says "Currently unused by dbx"...

-- 
Pedro Alves

Re: [PATCH 4/4] Delete unused functions in sol-thread.c.

[Pedro Alves]

On 09/20/2012 10:43 PM, Joel Brobecker wrote:
> And the next step I propose, to finish the work, is to move these
> functions to their own file (sol-sparc-thread.c). We would then
> only build that file for sparc-solaris native GDB.

Fine with me either way.

> 
> gdb/ChangeLog:
> 
>         * sol-thread.c (ps_lgetxregsize, ps_lgetxregs, ps_lsetxregs):
>         Move these functions to sol-sparc-thread.c.
>         * sol-sparc-thread.c: New file.

Following gdb naming de facto convention this new file would be named
sparc-sol-thread.c though (as e.g., amd64-linux-nat.c, etc.).

-- 
Pedro Alves

Re: [PATCH 4/4] Delete unused functions in sol-thread.c.

[Joel Brobecker]

> Fine with me either way.

OK - I will fix the formatting issue, and commit separately.

> > gdb/ChangeLog:
> > 
> >         * sol-thread.c (ps_lgetxregsize, ps_lgetxregs, ps_lsetxregs):
> >         Move these functions to sol-sparc-thread.c.
> >         * sol-sparc-thread.c: New file.
> 
> Following gdb naming de facto convention this new file would be named
> sparc-sol-thread.c though (as e.g., amd64-linux-nat.c, etc.).

But we already have ravenscar-sparc-thread.c :). I guess we should fix
that too. Global consistency is probably better than per-topic
consistency...

Thanks for the review. I'll work on the last few details as soon as
I have a moment.

-- 
Joel

Re: [PATCH 4/4] Delete unused functions in sol-thread.c.

[Joel Brobecker]

> There's more '#if 0'-related code in the file.  I think that if we're
> removing these, we should get rid of all of it.

I'll take care of those too...

> I found it curious that
> http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/lib/libc_db/common/thread_db.c
> says "Currently unused by dbx"...

That might explain why it's OK to do nothing inside these routines...

-- 
Joel

checked in: [PATCH 1/4] Fix declaration of proc_find_memory_regions

[Joel Brobecker]

> gdb/ChangeLog:
> 
>         * procfs.c (proc_find_memory_regions): Fix declaration.

Checked in.

-- 
Joel

checked in: [PATCH 2/4] Make procfs.c:proc_get_LDT_entry static

[Joel Brobecker]

> gdb/ChangeLog:
> 
>         * procfs.c (proc_get_LDT_entry): Make static.

Checked in.

-- 
Joel

checked in: [PATCH 3/4] Add procfs_find_LDT_entry declaration (procfs.h).

[Joel Brobecker]

> gdb/ChangeLog:
> 
>         * procfs.h (procfs_find_LDT_entry): Add declaration.
>         * sol-thread.c (ps_lgetLDT): Delete local declaration of
>         function procfs_find_LDT_entry.

Checked in after fixing the formatting issue that Jan pointed out
(thank you!).

-- 
Joel

checked in: [PATCH 4/4] Delete unused functions in sol-thread.c.

[Joel Brobecker]

> gdb/ChangeLog:
> 
>         * sol-thread.c (ps_lgetxregsize, ps_lgetxregs, ps_lsetxregs):
>         Enable this code for sparc hosts only.

Checked in, after having fixed the formatting issue.

> gdb/ChangeLog:
> 
>         * sol-thread.c (ps_lgetxregsize, ps_lgetxregs, ps_lsetxregs):
>         Remove commented-out code.

Checked in.

-- 
Joel

checked in: New unit sparc-sol-thread.c extracted from sol-thread.c

[Joel Brobecker]

[-- Attachment #1: Type: text/plain, Size: 493 bytes --]

> gdb/ChangeLog:
> 
>         * sol-thread.c (ps_lgetxregsize, ps_lgetxregs, ps_lsetxregs):
>         Move these functions to sol-sparc-thread.c.
>         * sol-sparc-thread.c: New file.
>         * configure.ac: Add sol-sparc-thread.o to CONFIG_OBS and
>         sol-sparc-thread.c to CONFIG_SRCS for sparc-solaris native
>         configurations.
>         * configure: Regenerate.

Here is the patch that I checked in. It only renamed sol-sparc-thread.c
into sparc-sol-thread.c.

-- 
Joel

[-- Attachment #2: 0003-New-unit-sparc-sol-thread.c-extracted-from-sol-threa.patch --]
[-- Type: text/x-diff, Size: 5610 bytes --]

From 331eba3bb8038a13df707e5bd4194f1e4f178688 Mon Sep 17 00:00:00 2001
From: Joel Brobecker <brobecker@adacore.com>
Date: Thu, 20 Sep 2012 18:17:22 -0400
Subject: [PATCH 1/2] New unit sparc-sol-thread.c extracted from sol-thread.c

Moving some sparc-specific routines out of sol-thread.c into their
own (new) file.

gdb/ChangeLog:

        * sol-thread.c (ps_lgetxregsize, ps_lgetxregs, ps_lsetxregs):
        Move these functions to sparc-sol-thread.c.
        * sparc-sol-thread.c: New file.
        * configure.ac: Add sparc-sol-thread.o to CONFIG_OBS and
        sparc-sol-thread.c to CONFIG_SRCS for sparc-solaris native
        configurations.
        * configure: Regenerate.
---
 gdb/ChangeLog          |   10 ++++++++++
 gdb/configure          |    7 +++++++
 gdb/configure.ac       |    7 +++++++
 gdb/sol-thread.c       |   28 ----------------------------
 gdb/sparc-sol-thread.c |   43 +++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 67 insertions(+), 28 deletions(-)
 create mode 100644 gdb/sparc-sol-thread.c

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index fe6bc60..aba3e0f 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,6 +1,16 @@
 2012-09-27  Joel Brobecker  <brobecker@adacore.com>
 
 	* sol-thread.c (ps_lgetxregsize, ps_lgetxregs, ps_lsetxregs):
+	Move these functions to sparc-sol-thread.c.
+	* sparc-sol-thread.c: New file.
+	* configure.ac: Add sparc-sol-thread.o to CONFIG_OBS and
+	sparc-sol-thread.c to CONFIG_SRCS for sparc-solaris native
+	configurations.
+	* configure: Regenerate.
+
+2012-09-27  Joel Brobecker  <brobecker@adacore.com>
+
+	* sol-thread.c (ps_lgetxregsize, ps_lgetxregs, ps_lsetxregs):
 	Remove commented-out code.
 
 2012-09-27  Joel Brobecker  <brobecker@adacore.com>
diff --git a/gdb/configure b/gdb/configure
index f1a8f0f..d913de6 100755
--- a/gdb/configure
+++ b/gdb/configure
@@ -11969,6 +11969,13 @@ $as_echo "#define HAVE_THREAD_DB_LIB 1" >>confdefs.h
 
          CONFIG_OBS="${CONFIG_OBS} sol-thread.o"
          CONFIG_SRCS="${CONFIG_SRCS} sol-thread.c"
+         # On SPARC CPUs, we also need to build sparc-sol-thread.
+         case ${host_cpu} in
+           sparc*)
+             CONFIG_OBS="${CONFIG_OBS} sparc-sol-thread.o"
+             CONFIG_SRCS="${CONFIG_SRCS} sparc-sol-thread.c"
+             ;;
+         esac
          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5
 $as_echo_n "checking for dlopen in -ldl... " >&6; }
 if test "${ac_cv_lib_dl_dlopen+set}" = set; then :
diff --git a/gdb/configure.ac b/gdb/configure.ac
index 0c62b46..c0fd0e1 100644
--- a/gdb/configure.ac
+++ b/gdb/configure.ac
@@ -1719,6 +1719,13 @@ if test ${build} = ${host} -a ${host} = ${target} ; then
          [Define if using Solaris thread debugging.])
          CONFIG_OBS="${CONFIG_OBS} sol-thread.o"
          CONFIG_SRCS="${CONFIG_SRCS} sol-thread.c"
+         # On SPARC CPUs, we also need to build sparc-sol-thread.
+         case ${host_cpu} in
+           sparc*)
+             CONFIG_OBS="${CONFIG_OBS} sparc-sol-thread.o"
+             CONFIG_SRCS="${CONFIG_SRCS} sparc-sol-thread.c"
+             ;;
+         esac
          AC_CHECK_LIB(dl, dlopen)
 	 CONFIG_LDFLAGS="${CONFIG_LDFLAGS} $RDYNAMIC"
 	 # Sun randomly tweaked the prototypes in <proc_service.h>
diff --git a/gdb/sol-thread.c b/gdb/sol-thread.c
index d948e9c..585a77f 100644
--- a/gdb/sol-thread.c
+++ b/gdb/sol-thread.c
@@ -959,34 +959,6 @@ ps_plog (const char *fmt, ...)
   vfprintf_filtered (gdb_stderr, fmt, args);
 }
 
-#if defined (__sparc) || defined (__sparcv9)
-
-/* Get size of extra register set.  Currently a noop.  */
-
-ps_err_e
-ps_lgetxregsize (gdb_ps_prochandle_t ph, lwpid_t lwpid, int *xregsize)
-{
-  return PS_OK;
-}
-
-/* Get extra register set.  Currently a noop.  */
-
-ps_err_e
-ps_lgetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset)
-{
-  return PS_OK;
-}
-
-/* Set extra register set.  Currently a noop.  */
-
-ps_err_e
-ps_lsetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset)
-{
-  return PS_OK;
-}
-
-#endif /* defined (__sparc) || defined (__sparcv9) */
-
 /* Get floating-point registers for LWP.  */
 
 ps_err_e
diff --git a/gdb/sparc-sol-thread.c b/gdb/sparc-sol-thread.c
new file mode 100644
index 0000000..6b7c49d
--- /dev/null
+++ b/gdb/sparc-sol-thread.c
@@ -0,0 +1,43 @@
+/* Copyright (C) 2012 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 <proc_service.h>
+
+/* Get size of extra register set.  Currently a noop.  */
+
+ps_err_e
+ps_lgetxregsize (struct ps_prochandle *ph, lwpid_t lwpid, int *xregsize)
+{
+  return PS_OK;
+}
+
+/* Get extra register set.  Currently a noop.  */
+
+ps_err_e
+ps_lgetxregs (struct ps_prochandle *ph, lwpid_t lwpid, caddr_t xregset)
+{
+  return PS_OK;
+}
+
+/* Set extra register set.  Currently a noop.  */
+
+ps_err_e
+ps_lsetxregs (struct ps_prochandle *ph, lwpid_t lwpid, caddr_t xregset)
+{
+  return PS_OK;
+}
-- 
1.7.9.5

checked in: sol-thread.c: Remove commented-out code

[Joel Brobecker]

[-- Attachment #1: Type: text/plain, Size: 401 bytes --]

> There's more '#if 0'-related code in the file.  I think that if we're
> removing these, we should get rid of all of it.

Attached is the patch I checked in, removing all thise #if 0's.
The code inside them has been there since start of CVS...

gdb/ChangeLog:

        * sol-thread.c (sol_thread_fetch_registers)
        (sol_thread_store_registers): Delete commented out code.

Checked in.
-- 
Joel

[-- Attachment #2: 0004-sol-thread.c-Remove-commented-out-code.patch --]
[-- Type: text/x-diff, Size: 3855 bytes --]

From 6c52bb3ac607244001e00fed5fc489fbabdaf53b Mon Sep 17 00:00:00 2001
From: Joel Brobecker <brobecker@adacore.com>
Date: Thu, 27 Sep 2012 12:40:38 +0200
Subject: [PATCH 2/2] sol-thread.c: Remove commented-out code.

gdb/ChangeLog:

        * sol-thread.c (sol_thread_fetch_registers)
        (sol_thread_store_registers): Delete commented out code.
---
 gdb/ChangeLog    |    5 +++++
 gdb/sol-thread.c |   54 ------------------------------------------------------
 2 files changed, 5 insertions(+), 54 deletions(-)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index aba3e0f..8faa029 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,10 @@
 2012-09-27  Joel Brobecker  <brobecker@adacore.com>
 
+	* sol-thread.c (sol_thread_fetch_registers)
+	(sol_thread_store_registers): Delete commented out code.
+
+2012-09-27  Joel Brobecker  <brobecker@adacore.com>
+
 	* sol-thread.c (ps_lgetxregsize, ps_lgetxregs, ps_lsetxregs):
 	Move these functions to sparc-sol-thread.c.
 	* sparc-sol-thread.c: New file.
diff --git a/gdb/sol-thread.c b/gdb/sol-thread.c
index 585a77f..bd31f4f 100644
--- a/gdb/sol-thread.c
+++ b/gdb/sol-thread.c
@@ -443,11 +443,6 @@ sol_thread_fetch_registers (struct target_ops *ops,
   gdb_fpregset_t *fpregset_p = &fpregset;
   struct target_ops *beneath = find_target_beneath (ops);
 
-#if 0
-  int xregsize;
-  caddr_t xregset;
-#endif
-
   if (!is_thread (inferior_ptid))
     {
       /* It's an LWP; pass the request on to the layer beneath.  */
@@ -488,23 +483,6 @@ sol_thread_fetch_registers (struct target_ops *ops,
 
   supply_gregset (regcache, (const gdb_gregset_t *) gregset_p);
   supply_fpregset (regcache, (const gdb_fpregset_t *) fpregset_p);
-
-#if 0
-  /* FIXME: libthread_db doesn't seem to handle this right.  */
-  val = td_thr_getxregsize (&thandle, &xregsize);
-  if (val != TD_OK && val != TD_NOXREGS)
-    error (_("sol_thread_fetch_registers: td_thr_getxregsize %s"),
-	   td_err_string (val));
-
-  if (val == TD_OK)
-    {
-      xregset = alloca (xregsize);
-      val = td_thr_getxregs (&thandle, xregset);
-      if (val != TD_OK)
-	error (_("sol_thread_fetch_registers: td_thr_getxregs %s"),
-	       td_err_string (val));
-    }
-#endif
 }
 
 static void
@@ -516,10 +494,6 @@ sol_thread_store_registers (struct target_ops *ops,
   td_err_e val;
   prgregset_t gregset;
   prfpregset_t fpregset;
-#if 0
-  int xregsize;
-  caddr_t xregset;
-#endif
 
   if (!is_thread (inferior_ptid))
     {
@@ -557,23 +531,6 @@ sol_thread_store_registers (struct target_ops *ops,
 
       /* Restore new register value.  */
       regcache_raw_supply (regcache, regnum, old_value);
-
-#if 0
-      /* FIXME: libthread_db doesn't seem to handle this right.  */
-      val = td_thr_getxregsize (&thandle, &xregsize);
-      if (val != TD_OK && val != TD_NOXREGS)
-	error (_("sol_thread_store_registers: td_thr_getxregsize %s"),
-	       td_err_string (val));
-
-      if (val == TD_OK)
-	{
-	  xregset = alloca (xregsize);
-	  val = td_thr_getxregs (&thandle, xregset);
-	  if (val != TD_OK)
-	    error (_("sol_thread_store_registers: td_thr_getxregs %s"),
-		   td_err_string (val));
-	}
-#endif
     }
 
   fill_gregset (regcache, (gdb_gregset_t *) &gregset, regnum);
@@ -587,17 +544,6 @@ sol_thread_store_registers (struct target_ops *ops,
   if (val != TD_OK)
     error (_("sol_thread_store_registers: td_thr_setfpregs %s"),
 	   td_err_string (val));
-
-#if 0
-  /* FIXME: libthread_db doesn't seem to handle this right.  */
-  val = td_thr_getxregsize (&thandle, &xregsize);
-  if (val != TD_OK && val != TD_NOXREGS)
-    error (_("sol_thread_store_registers: td_thr_getxregsize %s"),
-	   td_err_string (val));
-
-  /* ??? Should probably do something about writing the xregs here,
-     but what are they?  */
-#endif
 }
 
 /* Perform partial transfers on OBJECT.  See target_read_partial and
-- 
1.7.9.5