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[PATCH 16/17] Xtensa 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>
- Date: Mon, 1 Jul 2013 04:42:24 -0300
- Subject: [PATCH 16/17] Xtensa support
- References: <1372664545-3947-1-git-send-email-sergiodj at redhat dot com>
Xtensa target support. It uses a different value for SIGRTMAX,
therefore we have to handle it here.
2013-07-01 Sergio Durigan Junior <sergiodj@redhat.com>
* xtensa-linux-tdep.c: Define enum with differences between
Xtensa and x86.
(xtensa_linux_gdb_signal_to_target): New function.
(xtensa_linux_init_abi): Set gdbarch_gdb_signal_to_target to
xtensa_linux_gdb_signal_to_target.
---
gdb/xtensa-linux-tdep.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 49 insertions(+)
diff --git a/gdb/xtensa-linux-tdep.c b/gdb/xtensa-linux-tdep.c
index b7f11b9..3d1c356 100644
--- a/gdb/xtensa-linux-tdep.c
+++ b/gdb/xtensa-linux-tdep.c
@@ -23,6 +23,52 @@
#include "solib-svr4.h"
#include "symtab.h"
+/* This enum represents the signals' numbers on the Xtensa
+ architecture. It just contains the signal definitions which are
+ different from x86.
+
+ It is derived from the file <arch/xtensa/include/uapi/asm/signal.h>,
+ from the Linux kernel tree. */
+
+enum
+ {
+ XTENSA_LINUX_SIGRTMIN = 32,
+ XTENSA_LINUX_SIGRTMAX = 63,
+ };
+
+/* Implementation of `gdbarch_gdb_signal_to_target', as defined in
+ gdbarch.h. */
+
+static int
+xtensa_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 XTENSA_LINUX_SIGRTMIN;
+
+ /* GDB_SIGNAL_REALTIME_64 is not valid on Xtensa. */
+ case GDB_SIGNAL_REALTIME_64:
+ return -1;
+ }
+
+ /* GDB_SIGNAL_REALTIME_33 to _63 are continuous.
+
+ Xtensa does not have _64. */
+ if (signal >= GDB_SIGNAL_REALTIME_33
+ && signal <= GDB_SIGNAL_REALTIME_63)
+ {
+ int offset = signal - GDB_SIGNAL_REALTIME_33;
+
+ return XTENSA_LINUX_SIGRTMIN + 1 + offset;
+ }
+
+ return linux_gdb_signal_to_target (gdbarch, signal);
+}
+
/* OS specific initialization of gdbarch. */
static void
@@ -32,6 +78,9 @@ xtensa_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
+
+ set_gdbarch_gdb_signal_to_target (gdbarch,
+ xtensa_linux_gdb_signal_to_target);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
--
1.7.11.7