This is the mail archive of the gdb-patches@sources.redhat.com mailing list for the GDB project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

gdb and gdbserver support for MIPS NPTL


This patch provides ps_get_thread_area for both mips-linux-gdb and
mips-linux gdbserver.  I haven't checked it in yet, because the
corresponding kernel changes and glibc changes are still pending; I'll check
it in when they've been approved.  Just wanted to get it off my hard drive.

-- 
Daniel Jacobowitz
CodeSourcery, LLC

2005-03-17  Daniel Jacobowitz  <dan@codesourcery.com>

	* linux-mips-low.c: Include "gdb_proc_service.h".
	(PTRACE_GET_THREAD_AREA): Define.
	(ps_get_thread_area): New function.
	* Makefile.in: Update dependencies for linux-mips-low.o,
	linux-i386-low.o, and linux-x86-64-low.o.

2005-03-17  Daniel Jacobowitz  <dan@codesourcery.com>

	* linux-mips-low.c: Include "gdb_proc_service.h".
	(PTRACE_GET_THREAD_AREA): Define.
	(ps_get_thread_area): New function.
	* Makefile.in (mips-linux-nat.o): Update dependencies.

Index: gdb/gdb/gdbserver/linux-mips-low.c
===================================================================
--- gdb.orig/gdb/gdbserver/linux-mips-low.c	2002-06-11 13:32:39.000000000 -0400
+++ gdb/gdb/gdbserver/linux-mips-low.c	2005-02-13 21:59:15.000000000 -0500
@@ -22,6 +22,26 @@
 #include "server.h"
 #include "linux-low.h"
 
+#include <sys/ptrace.h>
+
+/* Correct for all GNU/Linux targets (for quite some time).  */
+#define GDB_GREGSET_T elf_gregset_t
+#define GDB_FPREGSET_T elf_fpregset_t
+
+#ifndef HAVE_ELF_FPREGSET_T
+/* Make sure we have said types.  Not all platforms bring in <linux/elf.h>
+   via <sys/procfs.h>.  */
+#ifdef HAVE_LINUX_ELF_H
+#include <linux/elf.h>
+#endif
+#endif
+
+#include "../gdb_proc_service.h"
+
+#ifndef PTRACE_GET_THREAD_AREA
+#define PTRACE_GET_THREAD_AREA 25
+#endif
+
 #ifdef HAVE_SYS_REG_H
 #include <sys/reg.h>
 #endif
@@ -140,6 +160,23 @@ mips_breakpoint_at (CORE_ADDR where)
   return 0;
 }
 
+/* Fetch the thread-local storage pointer for libthread_db.  */
+
+ps_err_e
+ps_get_thread_area (const struct ps_prochandle *ph,
+                    lwpid_t lwpid, int idx, void **base)
+{
+  if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) != 0)
+    return PS_ERR;
+
+  /* IDX is the bias from the thread pointer to the beginning of the
+     thread descriptor.  It has to be subtracted due to implementation
+     quirks in libthread_db.  */
+  *base = (void *) ((char *)*base - idx);
+
+  return PS_OK;
+}
+
 struct linux_target_ops the_low_target = {
   mips_num_regs,
   mips_regmap,
Index: gdb/gdb/gdbserver/Makefile.in
===================================================================
RCS file: /big/fsf/rsync/src-cvs/src/gdb/gdbserver/Makefile.in,v
retrieving revision 1.28
diff -u -p -r1.28 Makefile.in
--- gdb/gdb/gdbserver/Makefile.in	4 Mar 2005 18:16:25 -0000	1.28
+++ gdb/gdb/gdbserver/Makefile.in	17 Mar 2005 15:19:12 -0000
@@ -261,13 +261,16 @@ linux-low.o: linux-low.c $(linux_low_h) 
 	$(CC) -c $(CPPFLAGS) $(INTERNAL_CFLAGS) $< @USE_THREAD_DB@
 
 linux-arm-low.o: linux-arm-low.c $(linux_low_h) $(server_h)
-linux-i386-low.o: linux-i386-low.c $(linux_low_h) $(server_h)
+linux-i386-low.o: linux-i386-low.c $(linux_low_h) $(server_h) \
+	$(gdb_proc_service_h)
 linux-ia64-low.o: linux-ia64-low.c $(linux_low_h) $(server_h)
-linux-mips-low.o: linux-mips-low.c $(linux_low_h) $(server_h)
+linux-mips-low.o: linux-mips-low.c $(linux_low_h) $(server_h) \
+	$(gdb_proc_service_h)
 linux-ppc-low.o: linux-ppc-low.c $(linux_low_h) $(server_h)
 linux-s390-low.o: linux-s390-low.c $(linux_low_h) $(server_h)
 linux-sh-low.o: linux-sh-low.c $(linux_low_h) $(server_h)
-linux-x86-64-low.o: linux-x86-64-low.c $(linux_low_h) $(server_h)
+linux-x86-64-low.o: linux-x86-64-low.c $(linux_low_h) $(server_h) \
+	$(gdb_proc_service_h)
 
 reg-arm.o : reg-arm.c $(regdef_h)
 reg-arm.c : $(srcdir)/../regformats/reg-arm.dat $(regdat_sh)
Index: gdb/gdb/mips-linux-nat.c
===================================================================
--- gdb.orig/gdb/mips-linux-nat.c	2004-10-30 18:54:40.000000000 -0400
+++ gdb/gdb/mips-linux-nat.c	2005-02-13 22:01:48.087685946 -0500
@@ -22,6 +22,12 @@
 #include "defs.h"
 #include "mips-tdep.h"
 
+#include "gdb_proc_service.h"
+
+#ifndef PTRACE_GET_THREAD_AREA
+#define PTRACE_GET_THREAD_AREA 25
+#endif
+
 /* Pseudo registers can not be read.  ptrace does not provide a way to
    read (or set) MIPS_PS_REGNUM, and there's no point in reading or
    setting MIPS_ZERO_REGNUM.  We also can not set BADVADDR, CAUSE, or
@@ -62,3 +68,20 @@ mips_linux_cannot_store_register (int re
   else
     return 1;
 }
+
+/* Fetch the thread-local storage pointer for libthread_db.  */
+
+ps_err_e
+ps_get_thread_area (const struct ps_prochandle *ph,
+                    lwpid_t lwpid, int idx, void **base)
+{
+  if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) != 0)
+    return PS_ERR;
+
+  /* IDX is the bias from the thread pointer to the beginning of the
+     thread descriptor.  It has to be subtracted due to implementation
+     quirks in libthread_db.  */
+  *base = (void *) ((char *)*base - idx);
+
+  return PS_OK;
+}
Index: gdb/gdb/Makefile.in
===================================================================
--- gdb.orig/gdb/Makefile.in	2005-01-28 01:40:24.000000000 -0500
+++ gdb/gdb/Makefile.in	2005-02-13 21:59:15.000000000 -0500
@@ -2247,7 +2247,7 @@ mips64obsd-tdep.o: mips64obsd-tdep.c $(d
 	$(regset_h) $(trad_frame_h) $(tramp_frame_h) $(gdb_assert_h) \
 	$(gdb_string_h) $(mips_tdep_h) $(solib_svr4_h)
 mips-irix-tdep.o: mips-irix-tdep.c $(defs_h) $(osabi_h) $(elf_bfd_h)
-mips-linux-nat.o: mips-linux-nat.c $(defs_h) $(mips_tdep_h)
+mips-linux-nat.o: mips-linux-nat.c $(defs_h) $(mips_tdep_h) $(gdb_proc_service_h)
 mips-linux-tdep.o: mips-linux-tdep.c $(defs_h) $(gdbcore_h) $(target_h) \
 	$(solib_svr4_h) $(osabi_h) $(mips_tdep_h) $(gdb_string_h) \
 	$(gdb_assert_h) $(frame_h) $(regcache_h) $(trad_frame_h) \


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]