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[commit] MIPS/Linux native NPTL support
- From: Daniel Jacobowitz <drow at false dot org>
- To: gdb-patches at sourceware dot org
- Date: Wed, 15 Mar 2006 11:10:22 -0500
- Subject: [commit] MIPS/Linux native NPTL support
This patch adds NPTL libthread_db support to the native mips-linux port.
It should work for all three ABIs, although only a 64-bit GDB can debug
threads on a 64-bit debuggee; the current libthread_db interface does not
permit anything else, since it has pointer-sized variables.
Tested and committed.
--
Daniel Jacobowitz
CodeSourcery
2006-03-15 Daniel Jacobowitz <dan@codesourcery.com>
* mips-linux-nat.c: Include "gdb_proc_service.h".
(PTRACE_GET_THREAD_AREA): Define.
(ps_get_thread_area): New.
* Makefile.in (mips-linux-nat.o): Update.
Index: src/gdb/mips-linux-nat.c
===================================================================
--- src.orig/gdb/mips-linux-nat.c 2006-03-15 09:51:37.000000000 -0500
+++ src/gdb/mips-linux-nat.c 2006-03-15 09:51:51.000000000 -0500
@@ -1,6 +1,7 @@
/* Native-dependent code for GNU/Linux on MIPS processors.
- Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006
+ Free Software Foundation, Inc.
This file is part of GDB.
@@ -24,6 +25,12 @@
#include "target.h"
#include "linux-nat.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
@@ -65,6 +72,23 @@ mips_linux_cannot_store_register (int re
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;
+}
+
void _initialize_mips_linux_nat (void);
void
Index: src/gdb/Makefile.in
===================================================================
--- src.orig/gdb/Makefile.in 2006-03-15 09:51:37.000000000 -0500
+++ src/gdb/Makefile.in 2006-03-15 09:51:37.000000000 -0500
@@ -2295,7 +2295,7 @@ mips64obsd-tdep.o: mips64obsd-tdep.c $(d
$(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) $(target_h) \
- $(linux_nat_h)
+ $(linux_nat_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) \