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authorSergio Durigan Junior <sergiodj@redhat.com>2013-08-09 16:54:43 +0000
committerSergio Durigan Junior <sergiodj@redhat.com>2013-08-09 16:54:43 +0000
commiteb14d4068893a301911485d732b4ae961c34e532 (patch)
treef7888fba48ce96b6127e0384d5683c6094ef0999 /gdb/avr-tdep.c
parent156d08c82a586b3424e3f90b86c6a8b69156fef9 (diff)
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This patch implements the new gdbarch method gdbarch_gdb_signal_to_target.
It will be used when one wants to convert between the internal GDB signal representation (enum gdb_signal) and the target's representation. The idea of this patch came from a chat between Pedro and I on IRC, plus the discussion of my patches to add the new $_exitsignal convenience variable: <http://sourceware.org/ml/gdb-patches/2013-06/msg00452.html> <http://sourceware.org/ml/gdb-patches/2013-06/msg00352.html> What I did was to investigate, on the Linux kernel, which targets shared the signal numbers definition with the generic definition, present at <include/uapi/asm-generic/signal.h>. For the record, I used linux-3.10-rc7 as the main source of information, always looking at <arch/<ARCH_NAME>/include/uapi/asm/signal.h>. For SIGRTMAX (which defaults to _NSIG in most cases), I had to look at different signal-related files, but most of them (except MIPS) were defined to 64 anyway. Then, with all the differences in hand, I implemented the bits on each target. 2013-08-09 Sergio Durigan Junior <sergiodj@redhat.com> * linux-tdep.c: Define enum with generic signal numbers. (linux_gdb_signal_from_target): New function. (linux_gdb_signal_to_target): Likewise. (linux_init_abi): Set gdbarch_gdb_signal_{to,from}_target methods to the functions above. * linux-tdep.h (linux_gdb_signal_from_target): New prototype. (linux_gdb_signal_to_target): Likewise. * alpha-linux-tdep.c: Define new enum with signals different from generic Linux kernel. (alpha_linux_gdb_signal_from_target): New function. (alpha_linux_gdb_signal_to_target): Likewise. (alpha_linux_init_abi): Set gdbarch_gdb_signal_{to,from}_target with the functions mentioned above. * 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. * sparc-linux-tdep.c: Define enum with differences between SPARC and generic Linux kernel signal numbers. (sparc32_linux_gdb_signal_from_target): New function. (sparc32_linux_gdb_signal_to_target): Likewise. (sparc32_linux_init_abi): Set gdbarch_gdb_signal_{to,from}_target to the functions defined above. * xtensa-linux-tdep.c: Define enum with differences between Xtensa and Linux kernel generic signals. (xtensa_linux_gdb_signal_from_target): New function. (xtensa_linux_gdb_signal_to_target): Likewise. (xtensa_linux_init_abi): Set gdbarch_gdb_signal_to_target to the functions defined above. * mips-linux-tdep.c: Define enum with differences between signals in MIPS and Linux kernel generic ones. (mips_gdb_signal_to_target): New function. (mips_gdb_signal_from_target): Redefine to use new enum, handle only different signals from the Linux kernel generic. (mips_linux_init_abi): Set gdbarch_gdb_signal_{to,from}_target the functions defined above. * mips-linux-tdep.h (enum mips_signals): Remove.
Diffstat (limited to 'gdb/avr-tdep.c')
-rw-r--r--gdb/avr-tdep.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/gdb/avr-tdep.c b/gdb/avr-tdep.c
index fc4e0f0..6beac3d 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:
@@ -190,6 +191,19 @@ 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 the generic implementation.
+
+ 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 *
@@ -1341,6 +1355,60 @@ 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 *
@@ -1444,6 +1512,11 @@ 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;
}