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[PATCH 4/7] AVR support
- From: Sergio Durigan Junior <sergiodj at redhat dot com>
- To: GDB Patches <gdb-patches at sourceware dot org>
- Cc: Sergio Durigan Junior <sergiodj at redhat dot com>, Tom Tromey <tromey at redhat dot com>
- Date: Fri, 26 Jul 2013 17:13:11 -0300
- Subject: [PATCH 4/7] AVR support
- References: <1374869594-16965-1-git-send-email-sergiodj at redhat dot com>
Support for the AVR architecture. More of the same. Defining an enum
containing the differences between Linux kernel generic and AVR signals,
and treat them on avr_linux_gdb_signal_{to,from}_target. In this case,
the only difference is the SIGRTMAX.
2013-07-26 Sergio Durigan Junior <sergiodj@redhat.com>
* avr-tdep.c: Define enum with differences between Linux kernel
and AVR signals.
(avr_linux_gdb_signal_from_target): New function.
(avr_linux_gdb_signal_to_target): Likewise.
(avr_gdbarch_init): Set gdbarch_gdb_signal_{to,from}_target to
the functions mentioned above.
---
gdb/avr-tdep.c | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 74 insertions(+)
diff --git a/gdb/avr-tdep.c b/gdb/avr-tdep.c
index 0bc08a8..f3bf0c9 100644
--- a/gdb/avr-tdep.c
+++ b/gdb/avr-tdep.c
@@ -36,6 +36,7 @@
#include "regcache.h"
#include "gdb_string.h"
#include "dis-asm.h"
+#include "linux-tdep.h"
/* AVR Background:
@@ -193,6 +194,19 @@ struct gdbarch_tdep
struct type *pc_type;
};
+/* This enum represents the signals' numbers on the AVR
+ architecture. It just contains the signal definitions which are
+ different from x86.
+
+ It is derived from the file <arch/avr32/include/uapi/asm/signal.h>,
+ from the Linux kernel tree. */
+
+enum
+ {
+ AVR_LINUX_SIGRTMIN = 32,
+ AVR_LINUX_SIGRTMAX = 63,
+ };
+
/* Lookup the name of a register given it's number. */
static const char *
@@ -1344,6 +1358,61 @@ avr_dwarf_reg_to_regnum (struct gdbarch *gdbarch, int reg)
return -1;
}
+/* Implementation of `gdbarch_gdb_signal_from_target', as defined in
+ gdbarch.h. */
+
+static enum gdb_signal
+avr_linux_gdb_signal_from_target (struct gdbarch *gdbarch, int signal)
+{
+ if (signal >= AVR_LINUX_SIGRTMIN && signal <= AVR_LINUX_SIGRTMAX)
+ {
+ int offset = signal - AVR_LINUX_SIGRTMIN;
+
+ if (offset == 0)
+ return GDB_SIGNAL_REALTIME_32;
+ else
+ return (enum gdb_signal) (offset - 1
+ + (int) GDB_SIGNAL_REALTIME_33);
+ }
+ else if (signal > AVR_LINUX_SIGRTMAX)
+ return GDB_SIGNAL_UNKNOWN;
+
+ return linux_gdb_signal_from_target (gdbarch, signal);
+}
+
+/* Implementation of `gdbarch_gdb_signal_to_target', as defined in
+ gdbarch.h. */
+
+static int
+avr_linux_gdb_signal_to_target (struct gdbarch *gdbarch,
+ enum gdb_signal signal)
+{
+ switch (signal)
+ {
+ /* GDB_SIGNAL_REALTIME_32 is not continuous in <gdb/signals.def>,
+ therefore we have to handle it here. */
+ case GDB_SIGNAL_REALTIME_32:
+ return AVR_LINUX_SIGRTMIN;
+
+ /* GDB_SIGNAL_REALTIME_64 is not valid on AVR. */
+ case GDB_SIGNAL_REALTIME_64:
+ return -1;
+ }
+
+ /* GDB_SIGNAL_REALTIME_33 to _63 are continuous.
+
+ AVR does not have _64. */
+ if (signal >= GDB_SIGNAL_REALTIME_33
+ && signal <= GDB_SIGNAL_REALTIME_63)
+ {
+ int offset = signal - GDB_SIGNAL_REALTIME_33;
+
+ return AVR_LINUX_SIGRTMIN + 1 + offset;
+ }
+
+ return linux_gdb_signal_to_target (gdbarch, signal);
+}
+
/* Initialize the gdbarch structure for the AVR's. */
static struct gdbarch *
@@ -1447,6 +1516,11 @@ avr_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
set_gdbarch_unwind_pc (gdbarch, avr_unwind_pc);
set_gdbarch_unwind_sp (gdbarch, avr_unwind_sp);
+ set_gdbarch_gdb_signal_from_target (gdbarch,
+ avr_linux_gdb_signal_from_target);
+ set_gdbarch_gdb_signal_to_target (gdbarch,
+ avr_linux_gdb_signal_to_target);
+
return gdbarch;
}
--
1.7.11.7