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[PATCH, M68K] Handle TLS
- From: Maxim Kuvyrkov <maxim at codesourcery dot com>
- To: gdb-patches at sourceware dot org
- Cc: Andreas Schwab <schwab at redhat dot com>
- Date: Tue, 03 Nov 2009 19:12:09 +0300
- Subject: [PATCH, M68K] Handle TLS
Hi,
The following simple patch adds handling of TLS to m68k gdbserver.
A corresponding kernel patch is being reviewed here
<http://marc.info/?l=linux-m68k&m=125447760017098&w=2>.
Tested on coldfire-linux.
OK to apply?
Thanks!
--
Maxim Kuvyrkov
CodeSourcery
maxim@codesourcery.com
(650) 331-3385 x724
2009-11-03 Maxim Kuvyrkov <maxim@codesourcery.com>
* linux-m68k-low.c: Include <asm/ptrace.h>
(ps_get_thread_area): Implement.
Index: gdb/gdbserver/linux-m68k-low.c
===================================================================
RCS file: /cvs/src/src/gdb/gdbserver/linux-m68k-low.c,v
retrieving revision 1.13
diff -u -p -r1.13 linux-m68k-low.c
--- gdb/gdbserver/linux-m68k-low.c 3 Jan 2009 05:57:57 -0000 1.13
+++ gdb/gdbserver/linux-m68k-low.c 3 Nov 2009 15:47:25 -0000
@@ -154,6 +154,25 @@ m68k_breakpoint_at (CORE_ADDR pc)
return 0;
}
+#include <asm/ptrace.h>
+
+/* 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 = {
init_registers_m68k,
m68k_num_regs,