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-rw-r--r--toolchain/gdb/patches/640-debian_dwarf2-frame-signal-unwinder.patch120
1 files changed, 120 insertions, 0 deletions
diff --git a/toolchain/gdb/patches/640-debian_dwarf2-frame-signal-unwinder.patch b/toolchain/gdb/patches/640-debian_dwarf2-frame-signal-unwinder.patch
new file mode 100644
index 000000000..246427ee6
--- /dev/null
+++ b/toolchain/gdb/patches/640-debian_dwarf2-frame-signal-unwinder.patch
@@ -0,0 +1,120 @@
+Status: Checked in to HEAD after 6.3.
+
+2004-11-07 Daniel Jacobowitz <dan@debian.org>
+
+ * dwarf2-frame.c (struct dwarf2_frame_ops): Add signal_frame_p.
+ (dwarf2_frame_set_signal_frame_p, dwarf2_frame_signal_frame_p)
+ (dwarf2_signal_frame_unwind): New.
+ (dwarf2_frame_sniffer): Use dwarf2_frame_signal_frame_p.
+ * dwarf2-frame.h (dwarf2_frame_set_signal_frame_p): New prototype.
+
+Index: src/gdb/dwarf2-frame.c
+===================================================================
+RCS file: /big/fsf/rsync/src-cvs/src/gdb/dwarf2-frame.c,v
+retrieving revision 1.41
+diff -u -p -r1.41 dwarf2-frame.c
+--- src/gdb/dwarf2-frame.c 4 Nov 2004 21:15:15 -0000 1.41
++++ src/gdb/dwarf2-frame.c 7 Nov 2004 17:41:58 -0000
+@@ -471,6 +471,10 @@ struct dwarf2_frame_ops
+ {
+ /* Pre-initialize the register state REG for register REGNUM. */
+ void (*init_reg) (struct gdbarch *, int, struct dwarf2_frame_state_reg *);
++
++ /* Check whether the frame preceding NEXT_FRAME will be a signal
++ trampoline. */
++ int (*signal_frame_p) (struct gdbarch *, struct frame_info *);
+ };
+
+ /* Default architecture-specific register state initialization
+@@ -547,6 +551,33 @@ dwarf2_frame_init_reg (struct gdbarch *g
+
+ ops->init_reg (gdbarch, regnum, reg);
+ }
++
++/* Set the architecture-specific signal trampoline recognition
++ function for GDBARCH to SIGNAL_FRAME_P. */
++
++void
++dwarf2_frame_set_signal_frame_p (struct gdbarch *gdbarch,
++ int (*signal_frame_p) (struct gdbarch *,
++ struct frame_info *))
++{
++ struct dwarf2_frame_ops *ops = gdbarch_data (gdbarch, dwarf2_frame_data);
++
++ ops->signal_frame_p = signal_frame_p;
++}
++
++/* Query the architecture-specific signal frame recognizer for
++ NEXT_FRAME. */
++
++static int
++dwarf2_frame_signal_frame_p (struct gdbarch *gdbarch,
++ struct frame_info *next_frame)
++{
++ struct dwarf2_frame_ops *ops = gdbarch_data (gdbarch, dwarf2_frame_data);
++
++ if (ops->signal_frame_p == NULL)
++ return 0;
++ return ops->signal_frame_p (gdbarch, next_frame);
++}
+
+
+ struct dwarf2_frame_cache
+@@ -841,6 +872,13 @@ static const struct frame_unwind dwarf2_
+ dwarf2_frame_prev_register
+ };
+
++static const struct frame_unwind dwarf2_signal_frame_unwind =
++{
++ SIGTRAMP_FRAME,
++ dwarf2_frame_this_id,
++ dwarf2_frame_prev_register
++};
++
+ const struct frame_unwind *
+ dwarf2_frame_sniffer (struct frame_info *next_frame)
+ {
+@@ -848,10 +886,18 @@ dwarf2_frame_sniffer (struct frame_info
+ function. frame_pc_unwind(), for a no-return next function, can
+ end up returning something past the end of this function's body. */
+ CORE_ADDR block_addr = frame_unwind_address_in_block (next_frame);
+- if (dwarf2_frame_find_fde (&block_addr))
+- return &dwarf2_frame_unwind;
++ if (!dwarf2_frame_find_fde (&block_addr))
++ return NULL;
+
+- return NULL;
++ /* On some targets, signal trampolines may have unwind information.
++ We need to recognize them so that we set the frame type
++ correctly. */
++
++ if (dwarf2_frame_signal_frame_p (get_frame_arch (next_frame),
++ next_frame))
++ return &dwarf2_signal_frame_unwind;
++
++ return &dwarf2_frame_unwind;
+ }
+
+
+Index: src/gdb/dwarf2-frame.h
+===================================================================
+RCS file: /big/fsf/rsync/src-cvs/src/gdb/dwarf2-frame.h,v
+retrieving revision 1.6
+diff -u -p -r1.6 dwarf2-frame.h
+--- src/gdb/dwarf2-frame.h 28 Feb 2004 16:59:32 -0000 1.6
++++ src/gdb/dwarf2-frame.h 7 Nov 2004 17:40:41 -0000
+@@ -79,6 +79,14 @@ extern void dwarf2_frame_set_init_reg (s
+ void (*init_reg) (struct gdbarch *, int,
+ struct dwarf2_frame_state_reg *));
+
++/* Set the architecture-specific signal trampoline recognition
++ function for GDBARCH to SIGNAL_FRAME_P. */
++
++extern void
++ dwarf2_frame_set_signal_frame_p (struct gdbarch *gdbarch,
++ int (*signal_frame_p) (struct gdbarch *,
++ struct frame_info *));
++
+ /* Return the frame unwind methods for the function that contains PC,
+ or NULL if it can't be handled by DWARF CFI frame unwinder. */
+