[PATCH 0/7] Implement gdbarch_gdb_signal_{to,from}_target

[PATCH 0/7] Implement gdbarch_gdb_signal_{to,from}_target

[Sergio Durigan Junior]

This is the second attempt to implement gdbarch_gdb_signal_to_target,
but this time with the additional implementation of
gdbarch_gdb_signal_from_target (a MIPS-only method so far).

The first attempt is here:

<http://sourceware.org/ml/gdb-patches/2013-07/msg00002.html>

The notable changes are:

- linux-tdep.c now registers the generic converters itself, thus
  eliminating the need for every target to do so.

- Comment about SIGSWI on ARM (discussion here:
  <http://sourceware.org/ml/gdb-patches/2013-07/msg00002.html>).

- Rewrite MIPS implementation of gdbarch_gdb_signal_from_target.
  Remove "enum mips_signals".

Hopefully everything is right now.  If the patch is approved, I intend
to commit it as a whole, instead of each chunk separately.

Thanks.

[PATCH 6/7] Xtensa support

[Sergio Durigan Junior]

Xtensa target support.  It uses a different value for SIGRTMAX,
therefore we have to handle it here.

2013-07-26  Sergio Durigan Junior  <sergiodj@redhat.com>

	* 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.
---
 gdb/xtensa-linux-tdep.c | 74 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)

diff --git a/gdb/xtensa-linux-tdep.c b/gdb/xtensa-linux-tdep.c
index b7f11b9..fb32826 100644
--- a/gdb/xtensa-linux-tdep.c
+++ b/gdb/xtensa-linux-tdep.c
@@ -23,6 +23,75 @@
 #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_from_target', as defined in
+   gdbarch.h.  */
+
+static enum gdb_signal
+xtensa_linux_gdb_signal_from_target (struct gdbarch *gdbarch,
+				   int signal)
+{
+  if (signal >= XTENSA_LINUX_SIGRTMIN && signal <= XTENSA_LINUX_SIGRTMAX)
+    {
+      int offset = signal - XTENSA_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 > XTENSA_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
+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 +101,11 @@ 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_from_target (gdbarch,
+				      xtensa_linux_gdb_signal_from_target);
+  set_gdbarch_gdb_signal_to_target (gdbarch,
+				    xtensa_linux_gdb_signal_to_target);
 }
 
 /* Provide a prototype to silence -Wmissing-prototypes.  */
-- 
1.7.11.7

[PATCH 3/7] Alpha support

[Sergio Durigan Junior]

This patch implements the support for the Alpha architecture.  Since
this arch has some differences from the generic implementation, it
basically defines an enum with those different signals, which is later
used by alpha_linux_gdb_signal_{to,from}_target to return the proper
signal number.

2013-07-26  Sergio Durigan Junior  <sergiodj@redhat.com>

	* 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.
---
 gdb/alpha-linux-tdep.c | 142 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 142 insertions(+)

diff --git a/gdb/alpha-linux-tdep.c b/gdb/alpha-linux-tdep.c
index 9efc5bd..7ba64e2 100644
--- a/gdb/alpha-linux-tdep.c
+++ b/gdb/alpha-linux-tdep.c
@@ -28,6 +28,35 @@
 #include "linux-tdep.h"
 #include "alpha-tdep.h"
 
+/* This enum represents the signals' numbers on the Alpha
+   architecture.  It just contains the signal definitions which are
+   different from x86.
+
+   It is derived from the file <arch/alpha/include/uapi/asm/signal.h>,
+   from the Linux kernel tree.  */
+
+enum
+  {
+    /* SIGABRT is the same as in x86, but is defined here because
+       SIGIOT depends on it.  */
+    ALPHA_LINUX_SIGABRT = 6,
+    ALPHA_LINUX_SIGEMT = 7,
+    ALPHA_LINUX_SIGBUS = 10,
+    ALPHA_LINUX_SIGSYS = 12,
+    ALPHA_LINUX_SIGURG = 16,
+    ALPHA_LINUX_SIGSTOP = 17,
+    ALPHA_LINUX_SIGTSTP = 18,
+    ALPHA_LINUX_SIGCONT = 19,
+    ALPHA_LINUX_SIGCHLD = 20,
+    ALPHA_LINUX_SIGIO = 23,
+    ALPHA_LINUX_SIGINFO = 29,
+    ALPHA_LINUX_SIGUSR1 = 30,
+    ALPHA_LINUX_SIGUSR2 = 31,
+    ALPHA_LINUX_SIGPOLL = ALPHA_LINUX_SIGIO,
+    ALPHA_LINUX_SIGPWR = ALPHA_LINUX_SIGINFO,
+    ALPHA_LINUX_SIGIOT = ALPHA_LINUX_SIGABRT,
+  };
+
 /* Under GNU/Linux, signal handler invocations can be identified by
    the designated code sequence that is used to return from a signal
    handler.  In particular, the return address of a signal handler
@@ -205,6 +234,114 @@ alpha_linux_regset_from_core_section (struct gdbarch *gdbarch,
   return NULL;
 }
 
+/* Implementation of `gdbarch_gdb_signal_from_target', as defined in
+   gdbarch.h.  */
+
+static enum gdb_signal
+alpha_linux_gdb_signal_from_target (struct gdbarch *gdbarch,
+				    int signal)
+{
+  switch (signal)
+    {
+    case ALPHA_LINUX_SIGEMT:
+      return GDB_SIGNAL_EMT;
+
+    case ALPHA_LINUX_SIGBUS:
+      return GDB_SIGNAL_BUS;
+
+    case ALPHA_LINUX_SIGSYS:
+      return GDB_SIGNAL_SYS;
+
+    case ALPHA_LINUX_SIGURG:
+      return GDB_SIGNAL_URG;
+
+    case ALPHA_LINUX_SIGSTOP:
+      return GDB_SIGNAL_STOP;
+
+    case ALPHA_LINUX_SIGTSTP:
+      return GDB_SIGNAL_TSTP;
+
+    case ALPHA_LINUX_SIGCONT:
+      return GDB_SIGNAL_CONT;
+
+    case ALPHA_LINUX_SIGCHLD:
+      return GDB_SIGNAL_CHLD;
+
+    /* No way to differentiate between SIGIO and SIGPOLL.
+       Therefore, we just handle the first one.  */
+    case ALPHA_LINUX_SIGIO:
+      return GDB_SIGNAL_IO;
+
+    /* No way to differentiate between SIGINFO and SIGPWR.
+       Therefore, we just handle the first one.  */
+    case ALPHA_LINUX_SIGINFO:
+      return GDB_SIGNAL_INFO;
+
+    case ALPHA_LINUX_SIGUSR1:
+      return GDB_SIGNAL_USR1;
+
+    case ALPHA_LINUX_SIGUSR2:
+      return GDB_SIGNAL_USR2;
+    }
+
+  return linux_gdb_signal_from_target (gdbarch, signal);
+}
+
+/* Implementation of `gdbarch_gdb_signal_to_target', as defined in
+   gdbarch.h.  */
+
+static int
+alpha_linux_gdb_signal_to_target (struct gdbarch *gdbarch,
+				  enum gdb_signal signal)
+{
+  switch (signal)
+    {
+    case GDB_SIGNAL_EMT:
+      return ALPHA_LINUX_SIGEMT;
+
+    case GDB_SIGNAL_BUS:
+      return ALPHA_LINUX_SIGBUS;
+
+    case GDB_SIGNAL_SYS:
+      return ALPHA_LINUX_SIGSYS;
+
+    case GDB_SIGNAL_URG:
+      return ALPHA_LINUX_SIGURG;
+
+    case GDB_SIGNAL_STOP:
+      return ALPHA_LINUX_SIGSTOP;
+
+    case GDB_SIGNAL_TSTP:
+      return ALPHA_LINUX_SIGTSTP;
+
+    case GDB_SIGNAL_CONT:
+      return ALPHA_LINUX_SIGCONT;
+
+    case GDB_SIGNAL_CHLD:
+      return ALPHA_LINUX_SIGCHLD;
+
+    case GDB_SIGNAL_IO:
+      return ALPHA_LINUX_SIGIO;
+
+    case GDB_SIGNAL_INFO:
+      return ALPHA_LINUX_SIGINFO;
+
+    case GDB_SIGNAL_USR1:
+      return ALPHA_LINUX_SIGUSR1;
+
+    case GDB_SIGNAL_USR2:
+      return ALPHA_LINUX_SIGUSR2;
+
+    case GDB_SIGNAL_POLL:
+      return ALPHA_LINUX_SIGPOLL;
+
+    case GDB_SIGNAL_PWR:
+      return ALPHA_LINUX_SIGPWR;
+    }
+
+  return linux_gdb_signal_to_target (gdbarch, signal);
+}
+
 static void
 alpha_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 {
@@ -236,6 +373,11 @@ alpha_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 
   set_gdbarch_regset_from_core_section
     (gdbarch, alpha_linux_regset_from_core_section);
+
+  set_gdbarch_gdb_signal_from_target (gdbarch,
+				      alpha_linux_gdb_signal_from_target);
+  set_gdbarch_gdb_signal_to_target (gdbarch,
+				    alpha_linux_gdb_signal_to_target);
 }
 
 /* Provide a prototype to silence -Wmissing-prototypes.  */
-- 
1.7.11.7

Re: [PATCH 3/7] Alpha support

[Pedro Alves]

Very small nit:

On 07/26/2013 09:13 PM, Sergio Durigan Junior wrote:
> +enum
> +  {
> +    /* SIGABRT is the same as in x86, but is defined here because

Stale reference to x86 that should be updated to refer to
the generic signals instead.  There are other instances in the series.

> +       SIGIOT depends on it.  */
> +    ALPHA_LINUX_SIGABRT = 6,

-- 
Pedro Alves

Re: [PATCH 3/7] Alpha support

[Sergio Durigan Junior]

On Monday, July 29 2013, Pedro Alves wrote:

> Very small nit:
>
> On 07/26/2013 09:13 PM, Sergio Durigan Junior wrote:
>> +enum
>> +  {
>> +    /* SIGABRT is the same as in x86, but is defined here because
>
> Stale reference to x86 that should be updated to refer to
> the generic signals instead.  There are other instances in the series.

Thanks, fixed.

I also fixed all nits pointed by Doug, so I guess nothing else stops
this patch to be checked in, right?

-- 
Sergio

Re: [PATCH 3/7] Alpha support

[Pedro Alves]

On 08/07/2013 10:09 PM, Sergio Durigan Junior wrote:
> Thanks, fixed.
> 
> I also fixed all nits pointed by Doug, so I guess nothing else stops
> this patch to be checked in, right?

Yes, I think so.

-- 
Pedro Alves

[PATCH 1/7] Implement the gdbarch.{sh,c,h} bits.

[Sergio Durigan Junior]

This patch basically implements the necessary bits to the new
gdbarch_gdb_signal_to_target function.

2013-07-26  Sergio Durigan Junior  <sergiodj@redhat.com>

	* gdbarch.sh (gdb_signal_to_target): New function.
	* gdbarch.c: Regenerate.
	* gdbarch.h: Regenerate.
---
 gdb/gdbarch.c  | 33 +++++++++++++++++++++++++++++++++
 gdb/gdbarch.h  | 14 ++++++++++++++
 gdb/gdbarch.sh |  9 +++++++++
 3 files changed, 56 insertions(+)

diff --git a/gdb/gdbarch.c b/gdb/gdbarch.c
index db35b40..1f3380e 100644
--- a/gdb/gdbarch.c
+++ b/gdb/gdbarch.c
@@ -261,6 +261,7 @@ struct gdbarch
   gdbarch_process_record_ftype *process_record;
   gdbarch_process_record_signal_ftype *process_record_signal;
   gdbarch_gdb_signal_from_target_ftype *gdb_signal_from_target;
+  gdbarch_gdb_signal_to_target_ftype *gdb_signal_to_target;
   gdbarch_get_siginfo_type_ftype *get_siginfo_type;
   gdbarch_record_special_symbol_ftype *record_special_symbol;
   gdbarch_get_syscall_number_ftype *get_syscall_number;
@@ -433,6 +434,7 @@ struct gdbarch startup_gdbarch =
   0,  /* process_record */
   0,  /* process_record_signal */
   0,  /* gdb_signal_from_target */
+  0,  /* gdb_signal_to_target */
   0,  /* get_siginfo_type */
   0,  /* record_special_symbol */
   0,  /* get_syscall_number */
@@ -738,6 +740,7 @@ verify_gdbarch (struct gdbarch *gdbarch)
   /* Skip verify of process_record, has predicate.  */
   /* Skip verify of process_record_signal, has predicate.  */
   /* Skip verify of gdb_signal_from_target, has predicate.  */
+  /* Skip verify of gdb_signal_to_target, has predicate.  */
   /* Skip verify of get_siginfo_type, has predicate.  */
   /* Skip verify of record_special_symbol, has predicate.  */
   /* Skip verify of get_syscall_number, has predicate.  */
@@ -1033,6 +1036,12 @@ gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file)
                       "gdbarch_dump: gdb_signal_from_target = <%s>\n",
                       host_address_to_string (gdbarch->gdb_signal_from_target));
   fprintf_unfiltered (file,
+                      "gdbarch_dump: gdbarch_gdb_signal_to_target_p() = %d\n",
+                      gdbarch_gdb_signal_to_target_p (gdbarch));
+  fprintf_unfiltered (file,
+                      "gdbarch_dump: gdb_signal_to_target = <%s>\n",
+                      host_address_to_string (gdbarch->gdb_signal_to_target));
+  fprintf_unfiltered (file,
                       "gdbarch_dump: gen_return_address = <%s>\n",
                       host_address_to_string (gdbarch->gen_return_address));
   fprintf_unfiltered (file,
@@ -3900,6 +3909,30 @@ set_gdbarch_gdb_signal_from_target (struct gdbarch *gdbarch,
 }
 
 int
+gdbarch_gdb_signal_to_target_p (struct gdbarch *gdbarch)
+{
+  gdb_assert (gdbarch != NULL);
+  return gdbarch->gdb_signal_to_target != NULL;
+}
+
+int
+gdbarch_gdb_signal_to_target (struct gdbarch *gdbarch, enum gdb_signal signal)
+{
+  gdb_assert (gdbarch != NULL);
+  gdb_assert (gdbarch->gdb_signal_to_target != NULL);
+  if (gdbarch_debug >= 2)
+    fprintf_unfiltered (gdb_stdlog, "gdbarch_gdb_signal_to_target called\n");
+  return gdbarch->gdb_signal_to_target (gdbarch, signal);
+}
+
+void
+set_gdbarch_gdb_signal_to_target (struct gdbarch *gdbarch,
+                                  gdbarch_gdb_signal_to_target_ftype gdb_signal_to_target)
+{
+  gdbarch->gdb_signal_to_target = gdb_signal_to_target;
+}
+
+int
 gdbarch_get_siginfo_type_p (struct gdbarch *gdbarch)
 {
   gdb_assert (gdbarch != NULL);
diff --git a/gdb/gdbarch.h b/gdb/gdbarch.h
index e1959c3..013f071 100644
--- a/gdb/gdbarch.h
+++ b/gdb/gdbarch.h
@@ -993,6 +993,20 @@ typedef enum gdb_signal (gdbarch_gdb_signal_from_target_ftype) (struct gdbarch *
 extern enum gdb_signal gdbarch_gdb_signal_from_target (struct gdbarch *gdbarch, int signo);
 extern void set_gdbarch_gdb_signal_from_target (struct gdbarch *gdbarch, gdbarch_gdb_signal_from_target_ftype *gdb_signal_from_target);
 
+/* Signal translation: translate the GDB's internal signal number into
+   the inferior's signal (target's) representation.  The implementation
+   of this method must be host independent.  IOW, don't rely on symbols
+   of the NAT_FILE header (the nm-*.h files), the host <signal.h>
+   header, or similar headers.
+   Return the target signal number if found, or -1 if the GDB internal
+   signal number is invalid. */
+
+extern int gdbarch_gdb_signal_to_target_p (struct gdbarch *gdbarch);
+
+typedef int (gdbarch_gdb_signal_to_target_ftype) (struct gdbarch *gdbarch, enum gdb_signal signal);
+extern int gdbarch_gdb_signal_to_target (struct gdbarch *gdbarch, enum gdb_signal signal);
+extern void set_gdbarch_gdb_signal_to_target (struct gdbarch *gdbarch, gdbarch_gdb_signal_to_target_ftype *gdb_signal_to_target);
+
 /* Extra signal info inspection.
   
    Return a type suitable to inspect extra signal information. */
diff --git a/gdb/gdbarch.sh b/gdb/gdbarch.sh
index c92a857..04ca38c 100755
--- a/gdb/gdbarch.sh
+++ b/gdb/gdbarch.sh
@@ -799,6 +799,15 @@ M:int:process_record_signal:struct regcache *regcache, enum gdb_signal signal:re
 # (target_wait, target_resume, etc.).
 M:enum gdb_signal:gdb_signal_from_target:int signo:signo
 
+# Signal translation: translate the GDB's internal signal number into
+# the inferior's signal (target's) representation.  The implementation
+# of this method must be host independent.  IOW, don't rely on symbols
+# of the NAT_FILE header (the nm-*.h files), the host <signal.h>
+# header, or similar headers.
+# Return the target signal number if found, or -1 if the GDB internal
+# signal number is invalid.
+M:int:gdb_signal_to_target:enum gdb_signal signal:signal
+
 # Extra signal info inspection.
 #
 # Return a type suitable to inspect extra signal information.
-- 
1.7.11.7

[PATCH 4/7] AVR support

[Sergio Durigan Junior]

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

Re: [PATCH 4/7] AVR support

[Doug Evans]

Hi.  Just a nit.

On Fri, Jul 26, 2013 at 1:13 PM, Sergio Durigan Junior
<sergiodj@redhat.com> wrote:
> 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_SIGNAL_REALTIME_33 to _63 are continuous.
> +

Nit: Either delete this blank line or move it to after the comment.

> +     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;
> +    }
> [...]

Re: [PATCH 4/7] AVR support

[Sergio Durigan Junior]

On Saturday, July 27 2013, Doug Evans wrote:

> Hi.  Just a nit.
>
> On Fri, Jul 26, 2013 at 1:13 PM, Sergio Durigan Junior
> <sergiodj@redhat.com> wrote:
>> 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_SIGNAL_REALTIME_33 to _63 are continuous.
>> +
>
> Nit: Either delete this blank line or move it to after the comment.

Fixed, thanks.

-- 
Sergio

[PATCH 7/7] MIPS support

[Sergio Durigan Junior]

Support for the MIPS target.  MIPS already had a definition of
gdbarch_gdb_signal_from_target, and also an enum containing all signal
numbers from this target.  So, in order to make things standard, I
removed the previous enum in favor of the new, difference-only enum
declared by this patch series.  And I also redefined the implementation
of gdbarch_gdb_signal_from_target for MIPS in order to take this new
enum into account, and only handle the signals which are different from
the Linux kernel generic ones.

2013-07-26  Sergio Durigan Junior  <sergiodj@redhat.com>

	* 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_gdb_signal_to_target (enum mips_signals): Remove.

mips
---
 gdb/mips-linux-tdep.c | 241 ++++++++++++++++++++++++++++++++++++++------------
 gdb/mips-linux-tdep.h |  42 ---------
 2 files changed, 185 insertions(+), 98 deletions(-)

diff --git a/gdb/mips-linux-tdep.c b/gdb/mips-linux-tdep.c
index 484b39f..816f120 100644
--- a/gdb/mips-linux-tdep.c
+++ b/gdb/mips-linux-tdep.c
@@ -45,6 +45,42 @@
 
 static struct target_so_ops mips_svr4_so_ops;
 
+/* This enum represents the signals' numbers on the MIPS
+   architecture.  It just contains the signal definitions which are
+   different from x86.
+
+   It is derived from the file <arch/mips/include/uapi/asm/signal.h>,
+   from the Linux kernel tree.  */
+
+enum
+  {
+    MIPS_LINUX_SIGEMT = 7,
+    MIPS_LINUX_SIGBUS = 10,
+    MIPS_LINUX_SIGSYS = 12,
+    MIPS_LINUX_SIGUSR1 = 16,
+    MIPS_LINUX_SIGUSR2 = 17,
+    MIPS_LINUX_SIGCHLD = 18,
+    MIPS_LINUX_SIGCLD = MIPS_LINUX_SIGCHLD,
+    MIPS_LINUX_SIGPWR = 19,
+    MIPS_LINUX_SIGWINCH = 20,
+    MIPS_LINUX_SIGURG = 21,
+    MIPS_LINUX_SIGIO = 22,
+    MIPS_LINUX_SIGPOLL = MIPS_LINUX_SIGIO,
+    MIPS_LINUX_SIGSTOP = 23,
+    MIPS_LINUX_SIGTSTP = 24,
+    MIPS_LINUX_SIGCONT = 25,
+    MIPS_LINUX_SIGTTIN = 26,
+    MIPS_LINUX_SIGTTOU = 27,
+    MIPS_LINUX_SIGVTALRM = 28,
+    MIPS_LINUX_SIGPROF = 29,
+    MIPS_LINUX_SIGXCPU = 30,
+    MIPS_LINUX_SIGXFSZ = 31,
+
+    MIPS_LINUX_SIGRTMIN = 32,
+    MIPS_LINUX_SIGRT64 = 64,
+    MIPS_LINUX_SIGRTMAX = 127,
+  };
+
 /* Figure out where the longjmp will land.
    We expect the first arg to be a pointer to the jmp_buf structure
    from which we extract the pc (MIPS_LINUX_JB_PC) that we will land
@@ -1339,94 +1375,184 @@ mips_linux_get_syscall_number (struct gdbarch *gdbarch,
   return ret;
 }
 
+/* Implementation of `gdbarch_gdb_signal_to_target', as defined in
+   gdbarch.h.  */
+
+static int
+mips_gdb_signal_to_target (struct gdbarch *gdbarch,
+			   enum gdb_signal signal)
+{
+  switch (signal)
+    {
+    case GDB_SIGNAL_EMT:
+      return MIPS_LINUX_SIGEMT;
+
+    case GDB_SIGNAL_BUS:
+      return MIPS_LINUX_SIGBUS;
+
+    case GDB_SIGNAL_SYS:
+      return MIPS_LINUX_SIGSYS;
+
+    case GDB_SIGNAL_USR1:
+      return MIPS_LINUX_SIGUSR1;
+
+    case GDB_SIGNAL_USR2:
+      return MIPS_LINUX_SIGUSR2;
+
+    case GDB_SIGNAL_CHLD:
+      return MIPS_LINUX_SIGCHLD;
+
+    case GDB_SIGNAL_PWR:
+      return MIPS_LINUX_SIGPWR;
+
+    case GDB_SIGNAL_WINCH:
+      return MIPS_LINUX_SIGWINCH;
+
+    case GDB_SIGNAL_URG:
+      return MIPS_LINUX_SIGURG;
+
+    case GDB_SIGNAL_IO:
+      return MIPS_LINUX_SIGIO;
+
+    case GDB_SIGNAL_POLL:
+      return MIPS_LINUX_SIGPOLL;
+
+    case GDB_SIGNAL_STOP:
+      return MIPS_LINUX_SIGSTOP;
+
+    case GDB_SIGNAL_TSTP:
+      return MIPS_LINUX_SIGTSTP;
+
+    case GDB_SIGNAL_CONT:
+      return MIPS_LINUX_SIGCONT;
+
+    case GDB_SIGNAL_TTIN:
+      return MIPS_LINUX_SIGTTIN;
+
+    case GDB_SIGNAL_TTOU:
+      return MIPS_LINUX_SIGTTOU;
+
+    case GDB_SIGNAL_VTALRM:
+      return MIPS_LINUX_SIGVTALRM;
+
+    case GDB_SIGNAL_PROF:
+      return MIPS_LINUX_SIGPROF;
+
+    case GDB_SIGNAL_XCPU:
+      return MIPS_LINUX_SIGXCPU;
+
+    case GDB_SIGNAL_XFSZ:
+      return MIPS_LINUX_SIGXFSZ;
+
+    /* GDB_SIGNAL_REALTIME_32 is not continuous in <gdb/signals.def>,
+       therefore we have to handle it here.  */
+    case GDB_SIGNAL_REALTIME_32:
+      return MIPS_LINUX_SIGRTMIN;
+    }
+
+  if (signal >= GDB_SIGNAL_REALTIME_33
+      && signal <= GDB_SIGNAL_REALTIME_63)
+    {
+      int offset = signal - GDB_SIGNAL_REALTIME_33;
+
+      return MIPS_LINUX_SIGRTMIN + 1 + offset;
+    }
+  else if (signal >= GDB_SIGNAL_REALTIME_64
+	   && signal <= GDB_SIGNAL_REALTIME_127)
+    {
+      int offset = signal - GDB_SIGNAL_REALTIME_64;
+
+      return MIPS_LINUX_SIGRT64 + offset;
+    }
+
+  return linux_gdb_signal_to_target (gdbarch, signal);
+}
+
 /* Translate signals based on MIPS signal values.
    Adapted from gdb/common/signals.c.  */
 
 static enum gdb_signal
-mips_gdb_signal_from_target (struct gdbarch *gdbarch, int signo)
+mips_gdb_signal_from_target (struct gdbarch *gdbarch, int signal)
 {
-  switch (signo)
+  switch (signal)
     {
-    case 0:
-      return GDB_SIGNAL_0;
-    case MIPS_SIGHUP:
-      return GDB_SIGNAL_HUP;
-    case MIPS_SIGINT:
-      return GDB_SIGNAL_INT;
-    case MIPS_SIGQUIT:
-      return GDB_SIGNAL_QUIT;
-    case MIPS_SIGILL:
-      return GDB_SIGNAL_ILL;
-    case MIPS_SIGTRAP:
-      return GDB_SIGNAL_TRAP;
-    case MIPS_SIGABRT:
-      return GDB_SIGNAL_ABRT;
-    case MIPS_SIGEMT:
+    case MIPS_LINUX_SIGEMT:
       return GDB_SIGNAL_EMT;
-    case MIPS_SIGFPE:
-      return GDB_SIGNAL_FPE;
-    case MIPS_SIGKILL:
-      return GDB_SIGNAL_KILL;
-    case MIPS_SIGBUS:
+
+    case MIPS_LINUX_SIGBUS:
       return GDB_SIGNAL_BUS;
-    case MIPS_SIGSEGV:
-      return GDB_SIGNAL_SEGV;
-    case MIPS_SIGSYS:
+
+    case MIPS_LINUX_SIGSYS:
       return GDB_SIGNAL_SYS;
-    case MIPS_SIGPIPE:
-      return GDB_SIGNAL_PIPE;
-    case MIPS_SIGALRM:
-      return GDB_SIGNAL_ALRM;
-    case MIPS_SIGTERM:
-      return GDB_SIGNAL_TERM;
-    case MIPS_SIGUSR1:
+
+    case MIPS_LINUX_SIGUSR1:
       return GDB_SIGNAL_USR1;
-    case MIPS_SIGUSR2:
+
+    case MIPS_LINUX_SIGUSR2:
       return GDB_SIGNAL_USR2;
-    case MIPS_SIGCHLD:
+
+    case MIPS_LINUX_SIGCHLD:
       return GDB_SIGNAL_CHLD;
-    case MIPS_SIGPWR:
+
+    case MIPS_LINUX_SIGPWR:
       return GDB_SIGNAL_PWR;
-    case MIPS_SIGWINCH:
+
+    case MIPS_LINUX_SIGWINCH:
       return GDB_SIGNAL_WINCH;
-    case MIPS_SIGURG:
+
+    case MIPS_LINUX_SIGURG:
       return GDB_SIGNAL_URG;
-    case MIPS_SIGPOLL:
-      return GDB_SIGNAL_POLL;
-    case MIPS_SIGSTOP:
+
+    /* No way to differentiate between SIGIO and SIGPOLL.
+       Therefore, we just handle the first one.  */
+    case MIPS_LINUX_SIGIO:
+      return GDB_SIGNAL_IO;
+
+    case MIPS_LINUX_SIGSTOP:
       return GDB_SIGNAL_STOP;
-    case MIPS_SIGTSTP:
+
+    case MIPS_LINUX_SIGTSTP:
       return GDB_SIGNAL_TSTP;
-    case MIPS_SIGCONT:
+
+    case MIPS_LINUX_SIGCONT:
       return GDB_SIGNAL_CONT;
-    case MIPS_SIGTTIN:
+
+    case MIPS_LINUX_SIGTTIN:
       return GDB_SIGNAL_TTIN;
-    case MIPS_SIGTTOU:
+
+    case MIPS_LINUX_SIGTTOU:
       return GDB_SIGNAL_TTOU;
-    case MIPS_SIGVTALRM:
+
+    case MIPS_LINUX_SIGVTALRM:
       return GDB_SIGNAL_VTALRM;
-    case MIPS_SIGPROF:
+
+    case MIPS_LINUX_SIGPROF:
       return GDB_SIGNAL_PROF;
-    case MIPS_SIGXCPU:
+
+    case MIPS_LINUX_SIGXCPU:
       return GDB_SIGNAL_XCPU;
-    case MIPS_SIGXFSZ:
+
+    case MIPS_LINUX_SIGXFSZ:
       return GDB_SIGNAL_XFSZ;
-  }
+    }
 
-  if (signo >= MIPS_SIGRTMIN && signo <= MIPS_SIGRTMAX)
+  if (signal >= MIPS_LINUX_SIGRTMIN && signal <= MIPS_LINUX_SIGRTMAX)
     {
       /* GDB_SIGNAL_REALTIME values are not contiguous, map parts of
          the MIPS block to the respective GDB_SIGNAL_REALTIME blocks.  */
-      signo -= MIPS_SIGRTMIN;
-      if (signo == 0)
+      int offset = signal - MIPS_LINUX_SIGRTMIN;
+
+      if (offset == 0)
 	return GDB_SIGNAL_REALTIME_32;
-      else if (signo < 32)
-	return ((enum gdb_signal) (signo - 1 + (int) GDB_SIGNAL_REALTIME_33));
+      else if (offset < 32)
+	return (enum gdb_signal) (offset - 1
+				  + (int) GDB_SIGNAL_REALTIME_33);
       else
-	return ((enum gdb_signal) (signo - 32 + (int) GDB_SIGNAL_REALTIME_64));
+	return (enum gdb_signal) (offset - 32
+				  + (int) GDB_SIGNAL_REALTIME_64);
     }
 
-  return GDB_SIGNAL_UNKNOWN;
+  return linux_gdb_signal_from_target (gdbarch, signal);
 }
 
 /* Initialize one of the GNU/Linux OS ABIs.  */
@@ -1516,6 +1642,9 @@ mips_linux_init_abi (struct gdbarch_info info,
   set_gdbarch_gdb_signal_from_target (gdbarch,
 				      mips_gdb_signal_from_target);
 
+  set_gdbarch_gdb_signal_to_target (gdbarch,
+				    mips_gdb_signal_to_target);
+
   tdep->syscall_next_pc = mips_linux_syscall_next_pc;
 
   if (tdesc_data)
diff --git a/gdb/mips-linux-tdep.h b/gdb/mips-linux-tdep.h
index 09cbc13..482d3c5 100644
--- a/gdb/mips-linux-tdep.h
+++ b/gdb/mips-linux-tdep.h
@@ -105,45 +105,3 @@ enum {
 /* Return 1 if MIPS_RESTART_REGNUM is usable.  */
 
 int mips_linux_restart_reg_p (struct gdbarch *gdbarch);
-
-/* MIPS Signals -- adapted from linux/arch/mips/include/asm/signal.h.  */
-
-enum mips_signals 
-  {
-    MIPS_SIGHUP    =  1,	/* Hangup (POSIX).  */
-    MIPS_SIGINT    =  2,	/* Interrupt (ANSI).  */
-    MIPS_SIGQUIT   =  3,	/* Quit (POSIX).  */
-    MIPS_SIGILL    =  4,	/* Illegal instruction (ANSI).  */
-    MIPS_SIGTRAP   =  5,	/* Trace trap (POSIX).  */
-    MIPS_SIGIOT    =  6,	/* IOT trap (4.2 BSD).  */
-    MIPS_SIGABRT   =  MIPS_SIGIOT, /* Abort (ANSI).  */
-    MIPS_SIGEMT    =  7,
-    MIPS_SIGFPE    =  8,	/* Floating-point exception (ANSI).  */
-    MIPS_SIGKILL   =  9,	/* Kill, unblockable (POSIX).  */
-    MIPS_SIGBUS    = 10,	/* BUS error (4.2 BSD).  */
-    MIPS_SIGSEGV   = 11,	/* Segmentation violation (ANSI).  */
-    MIPS_SIGSYS    = 12,
-    MIPS_SIGPIPE   = 13,	/* Broken pipe (POSIX).  */
-    MIPS_SIGALRM   = 14,	/* Alarm clock (POSIX).  */
-    MIPS_SIGTERM   = 15,	/* Termination (ANSI).  */
-    MIPS_SIGUSR1   = 16,	/* User-defined signal 1 (POSIX).  */
-    MIPS_SIGUSR2   = 17,	/* User-defined signal 2 (POSIX).  */
-    MIPS_SIGCHLD   = 18,	/* Child status has changed (POSIX).  */
-    MIPS_SIGCLD    = MIPS_SIGCHLD, /* Same as SIGCHLD (System V).  */
-    MIPS_SIGPWR    = 19,	/* Power failure restart (System V).  */
-    MIPS_SIGWINCH  = 20,	/* Window size change (4.3 BSD, Sun).  */
-    MIPS_SIGURG    = 21,	/* Urgent condition on socket (4.2 BSD).  */
-    MIPS_SIGIO     = 22,	/* I/O now possible (4.2 BSD).  */
-    MIPS_SIGPOLL   = MIPS_SIGIO, /* Pollable event occurred (System V).  */
-    MIPS_SIGSTOP   = 23,	/* Stop, unblockable (POSIX).  */
-    MIPS_SIGTSTP   = 24,	/* Keyboard stop (POSIX).  */
-    MIPS_SIGCONT   = 25,	/* Continue (POSIX).  */
-    MIPS_SIGTTIN   = 26,	/* Background read from tty (POSIX).  */
-    MIPS_SIGTTOU   = 27,	/* Background write to tty (POSIX).  */
-    MIPS_SIGVTALRM = 28,	/* Virtual alarm clock (4.2 BSD).  */
-    MIPS_SIGPROF   = 29,	/* Profiling alarm clock (4.2 BSD).  */
-    MIPS_SIGXCPU   = 30,	/* CPU limit exceeded (4.2 BSD).  */
-    MIPS_SIGXFSZ   = 31,	/* File size limit exceeded (4.2 BSD).  */
-    MIPS_SIGRTMIN  = 32,	/* Minimum RT signal.  */
-    MIPS_SIGRTMAX  = 128 - 1	/* Maximum RT signal.  */
-  };
-- 
1.7.11.7

Re: [PATCH 7/7] MIPS support

[Doug Evans]

Hi.  Just a nit.

On Fri, Jul 26, 2013 at 1:13 PM, Sergio Durigan Junior
<sergiodj@redhat.com> wrote:
> Support for the MIPS target.  MIPS already had a definition of
> gdbarch_gdb_signal_from_target, and also an enum containing all signal
> numbers from this target.  So, in order to make things standard, I
> removed the previous enum in favor of the new, difference-only enum
> declared by this patch series.  And I also redefined the implementation
> of gdbarch_gdb_signal_from_target for MIPS in order to take this new
> enum into account, and only handle the signals which are different from
> the Linux kernel generic ones.
>
> 2013-07-26  Sergio Durigan Junior  <sergiodj@redhat.com>
>
>         * 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_gdb_signal_to_target (enum mips_signals): Remove.

Nit: Fix changelog entry for mips-linux-tdep.h.

Re: [PATCH 7/7] MIPS support

[Sergio Durigan Junior]

On Saturday, July 27 2013, Doug Evans wrote:

> Hi.  Just a nit.
>
> On Fri, Jul 26, 2013 at 1:13 PM, Sergio Durigan Junior
> <sergiodj@redhat.com> wrote:
>> Support for the MIPS target.  MIPS already had a definition of
>> gdbarch_gdb_signal_from_target, and also an enum containing all signal
>> numbers from this target.  So, in order to make things standard, I
>> removed the previous enum in favor of the new, difference-only enum
>> declared by this patch series.  And I also redefined the implementation
>> of gdbarch_gdb_signal_from_target for MIPS in order to take this new
>> enum into account, and only handle the signals which are different from
>> the Linux kernel generic ones.
>>
>> 2013-07-26  Sergio Durigan Junior  <sergiodj@redhat.com>
>>
>>         * 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_gdb_signal_to_target (enum mips_signals): Remove.
>
> Nit: Fix changelog entry for mips-linux-tdep.h.

Done, thanks.

-- 
Sergio

[PATCH 2/7] Linux kernel generic support

[Sergio Durigan Junior]

This is, along with the gdbarch changes, the main patch of this series.
It implements the generic converter between GDB's internal signals and
Linux kernel generic ones, and also the converter for the other way
around (i.e., converting from Linux kernel generic signal to GDB's
internal representation).

It defines the full enum containing all Linux kernel generic signals (as
defined in <include/uapi/asm-generic/signal.h>). Then, it defines
the generics linux_gdb_signal_{to,from}_target, and export them to some
-tdep files.  These functions will be used by other targets when they
want to re-define some non-generic signals of their own, but want to use
the rest of the generic signals as-is.

For the specific case of linux_gdb_signal_from_target, it is actually
the natural extension of a previous MIPS-only implementation, which can
be seen at:

<http://sourceware.org/ml/gdb-patches/2012-06/msg00048.html>

Now every target that uses the Linux kernel supports this function.

This patch also includes a comment about SIGSWI for ARM target, which
can be seen at:

<http://sourceware.org/ml/gdb-patches/2013-07/msg00595.html>

OK to apply?

2013-07-26  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.
---
 gdb/linux-tdep.c | 320 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 gdb/linux-tdep.h |   6 ++
 2 files changed, 326 insertions(+)

diff --git a/gdb/linux-tdep.c b/gdb/linux-tdep.c
index bfb6404..fbdca46 100644
--- a/gdb/linux-tdep.c
+++ b/gdb/linux-tdep.c
@@ -36,6 +36,71 @@
 
 #include <ctype.h>
 
+/* This enum represents the signals' numbers on a generic architecture
+   running the Linux kernel.  The definition of "generic" comes from
+   the file <include/uapi/asm-generic/signal.h>, from the Linux kernel
+   tree, which is the "de facto" implementation of signal numbers to
+   be used by new architecture ports.
+
+   For those architectures which have differences between the generic
+   standard (e.g., Alpha), we define the different signals (and *only*
+   those) in the specific target-dependent file (e.g.,
+   alpha-linux-tdep.c, for Alpha).  Please refer to the architecture's
+   tdep file for more information.
+
+   ARM deserves a special mention here.  On the file
+   <arch/arm/include/uapi/asm/signal.h>, it defines only one different
+   (and ARM-only) signal, which is SIGSWI, with the same number as
+   SIGRTMIN.  This signal is used only for a very specific target,
+   called ArthurOS (from RISCOS).  Therefore, we do not handle it on
+   the ARM-tdep file, and we can safely use the generic signal handler
+   here for ARM targets.
+
+   As stated above, this enum is derived from
+   <include/uapi/asm-generic/signal.h>, from the Linux kernel
+   tree.  */
+
+enum
+  {
+    LINUX_SIGHUP = 1,
+    LINUX_SIGINT = 2,
+    LINUX_SIGQUIT = 3,
+    LINUX_SIGILL = 4,
+    LINUX_SIGTRAP = 5,
+    LINUX_SIGABRT = 6,
+    LINUX_SIGIOT = 6,
+    LINUX_SIGBUS = 7,
+    LINUX_SIGFPE = 8,
+    LINUX_SIGKILL = 9,
+    LINUX_SIGUSR1 = 10,
+    LINUX_SIGSEGV = 11,
+    LINUX_SIGUSR2 = 12,
+    LINUX_SIGPIPE = 13,
+    LINUX_SIGALRM = 14,
+    LINUX_SIGTERM = 15,
+    LINUX_SIGSTKFLT = 16,
+    LINUX_SIGCHLD = 17,
+    LINUX_SIGCONT = 18,
+    LINUX_SIGSTOP = 19,
+    LINUX_SIGTSTP = 20,
+    LINUX_SIGTTIN = 21,
+    LINUX_SIGTTOU = 22,
+    LINUX_SIGURG = 23,
+    LINUX_SIGXCPU = 24,
+    LINUX_SIGXFSZ = 25,
+    LINUX_SIGVTALRM = 26,
+    LINUX_SIGPROF = 27,
+    LINUX_SIGWINCH = 28,
+    LINUX_SIGIO = 29,
+    LINUX_SIGPOLL = LINUX_SIGIO,
+    LINUX_SIGPWR = 30,
+    LINUX_SIGSYS = 31,
+    LINUX_SIGUNUSED = 31,
+
+    LINUX_SIGRTMIN = 32,
+    LINUX_SIGRTMAX = 64,
+  };
+
 static struct gdbarch_data *linux_gdbarch_data_handle;
 
 struct linux_gdbarch_data
@@ -1447,6 +1512,257 @@ linux_make_corefile_notes_1 (struct gdbarch *gdbarch, bfd *obfd, int *note_size)
 				      linux_collect_thread_registers);
 }
 
+/* Implementation of `gdbarch_gdb_signal_from_target', as defined in
+   gdbarch.h.  This function is not static because it is exported to
+   other -tdep files.  */
+
+enum gdb_signal
+linux_gdb_signal_from_target (struct gdbarch *gdbarch, int signal)
+{
+  switch (signal)
+    {
+    case 0:
+      return GDB_SIGNAL_0;
+
+    case LINUX_SIGHUP:
+      return GDB_SIGNAL_HUP;
+
+    case LINUX_SIGINT:
+      return GDB_SIGNAL_INT;
+
+    case LINUX_SIGQUIT:
+      return GDB_SIGNAL_QUIT;
+
+    case LINUX_SIGILL:
+      return GDB_SIGNAL_ILL;
+
+    case LINUX_SIGTRAP:
+      return GDB_SIGNAL_TRAP;
+
+    case LINUX_SIGABRT:
+      return GDB_SIGNAL_ABRT;
+
+    case LINUX_SIGBUS:
+      return GDB_SIGNAL_BUS;
+
+    case LINUX_SIGFPE:
+      return GDB_SIGNAL_FPE;
+
+    case LINUX_SIGKILL:
+      return GDB_SIGNAL_KILL;
+
+    case LINUX_SIGUSR1:
+      return GDB_SIGNAL_USR1;
+
+    case LINUX_SIGSEGV:
+      return GDB_SIGNAL_SEGV;
+
+    case LINUX_SIGUSR2:
+      return GDB_SIGNAL_USR2;
+
+    case LINUX_SIGPIPE:
+      return GDB_SIGNAL_PIPE;
+
+    case LINUX_SIGALRM:
+      return GDB_SIGNAL_ALRM;
+
+    case LINUX_SIGTERM:
+      return GDB_SIGNAL_TERM;
+
+    case LINUX_SIGCHLD:
+      return GDB_SIGNAL_CHLD;
+
+    case LINUX_SIGCONT:
+      return GDB_SIGNAL_CONT;
+
+    case LINUX_SIGSTOP:
+      return GDB_SIGNAL_STOP;
+
+    case LINUX_SIGTSTP:
+      return GDB_SIGNAL_TSTP;
+
+    case LINUX_SIGTTIN:
+      return GDB_SIGNAL_TTIN;
+
+    case LINUX_SIGTTOU:
+      return GDB_SIGNAL_TTOU;
+
+    case LINUX_SIGURG:
+      return GDB_SIGNAL_URG;
+
+    case LINUX_SIGXCPU:
+      return GDB_SIGNAL_XCPU;
+
+    case LINUX_SIGXFSZ:
+      return GDB_SIGNAL_XFSZ;
+
+    case LINUX_SIGVTALRM:
+      return GDB_SIGNAL_VTALRM;
+
+    case LINUX_SIGPROF:
+      return GDB_SIGNAL_PROF;
+
+    case LINUX_SIGWINCH:
+      return GDB_SIGNAL_WINCH;
+
+    /* No way to differentiate between SIGIO and SIGPOLL.
+       Therefore, we just handle the first one.  */
+    case LINUX_SIGIO:
+      return GDB_SIGNAL_IO;
+
+    case LINUX_SIGPWR:
+      return GDB_SIGNAL_PWR;
+
+    case LINUX_SIGSYS:
+      return GDB_SIGNAL_SYS;
+
+    /* SIGRTMIN and SIGRTMAX are not continuous in <gdb/signals.def>,
+       therefore we have to handle them here.  */
+    case LINUX_SIGRTMIN:
+      return GDB_SIGNAL_REALTIME_32;
+
+    case LINUX_SIGRTMAX:
+      return GDB_SIGNAL_REALTIME_64;
+    }
+
+  if (signal >= LINUX_SIGRTMIN + 1 && signal <= LINUX_SIGRTMAX - 1)
+    {
+      int offset = signal - LINUX_SIGRTMIN + 1;
+
+      return (enum gdb_signal) ((int) GDB_SIGNAL_REALTIME_33 + offset);
+    }
+
+  return GDB_SIGNAL_UNKNOWN;
+}
+
+/* Implementation of `gdbarch_gdb_signal_to_target', as defined in
+   gdbarch.h.  This function is not static because it is exported to
+   other -tdep files.  */
+
+int
+linux_gdb_signal_to_target (struct gdbarch *gdbarch,
+			    enum gdb_signal signal)
+{
+  switch (signal)
+    {
+    case GDB_SIGNAL_0:
+      return 0;
+
+    case GDB_SIGNAL_HUP:
+      return LINUX_SIGHUP;
+
+    case GDB_SIGNAL_INT:
+      return LINUX_SIGINT;
+
+    case GDB_SIGNAL_QUIT:
+      return LINUX_SIGQUIT;
+
+    case GDB_SIGNAL_ILL:
+      return LINUX_SIGILL;
+
+    case GDB_SIGNAL_TRAP:
+      return LINUX_SIGTRAP;
+
+    case GDB_SIGNAL_ABRT:
+      return LINUX_SIGABRT;
+
+    case GDB_SIGNAL_FPE:
+      return LINUX_SIGFPE;
+
+    case GDB_SIGNAL_KILL:
+      return LINUX_SIGKILL;
+
+    case GDB_SIGNAL_BUS:
+      return LINUX_SIGBUS;
+
+    case GDB_SIGNAL_SEGV:
+      return LINUX_SIGSEGV;
+
+    case GDB_SIGNAL_SYS:
+      return LINUX_SIGSYS;
+
+    case GDB_SIGNAL_PIPE:
+      return LINUX_SIGPIPE;
+
+    case GDB_SIGNAL_ALRM:
+      return LINUX_SIGALRM;
+
+    case GDB_SIGNAL_TERM:
+      return LINUX_SIGTERM;
+
+    case GDB_SIGNAL_URG:
+      return LINUX_SIGURG;
+
+    case GDB_SIGNAL_STOP:
+      return LINUX_SIGSTOP;
+
+    case GDB_SIGNAL_TSTP:
+      return LINUX_SIGTSTP;
+
+    case GDB_SIGNAL_CONT:
+      return LINUX_SIGCONT;
+
+    case GDB_SIGNAL_CHLD:
+      return LINUX_SIGCHLD;
+
+    case GDB_SIGNAL_TTIN:
+      return LINUX_SIGTTIN;
+
+    case GDB_SIGNAL_TTOU:
+      return LINUX_SIGTTOU;
+
+    case GDB_SIGNAL_IO:
+      return LINUX_SIGIO;
+
+    case GDB_SIGNAL_XCPU:
+      return LINUX_SIGXCPU;
+
+    case GDB_SIGNAL_XFSZ:
+      return LINUX_SIGXFSZ;
+
+    case GDB_SIGNAL_VTALRM:
+      return LINUX_SIGVTALRM;
+
+    case GDB_SIGNAL_PROF:
+      return LINUX_SIGPROF;
+
+    case GDB_SIGNAL_WINCH:
+      return LINUX_SIGWINCH;
+
+    case GDB_SIGNAL_USR1:
+      return LINUX_SIGUSR1;
+
+    case GDB_SIGNAL_USR2:
+      return LINUX_SIGUSR2;
+
+    case GDB_SIGNAL_PWR:
+      return LINUX_SIGPWR;
+
+    case GDB_SIGNAL_POLL:
+      return LINUX_SIGPOLL;
+
+    /* GDB_SIGNAL_REALTIME_32 is not continuous in <gdb/signals.def>,
+       therefore we have to handle it here.  */
+    case GDB_SIGNAL_REALTIME_32:
+      return LINUX_SIGRTMIN;
+
+    /* Same comment applies to _64.  */
+    case GDB_SIGNAL_REALTIME_64:
+      return LINUX_SIGRTMAX;
+    }
+
+  /* GDB_SIGNAL_REALTIME_33 to _64 are continuous.  */
+  if (signal >= GDB_SIGNAL_REALTIME_33
+      && signal <= GDB_SIGNAL_REALTIME_63)
+    {
+      int offset = signal - GDB_SIGNAL_REALTIME_33;
+
+      return LINUX_SIGRTMIN + 1 + offset;
+    }
+
+  return -1;
+}
+
 /* To be called from the various GDB_OSABI_LINUX handlers for the
    various GNU/Linux architectures and machine types.  */
 
@@ -1460,6 +1776,10 @@ linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   set_gdbarch_make_corefile_notes (gdbarch, linux_make_corefile_notes_1);
   set_gdbarch_has_shared_address_space (gdbarch,
 					linux_has_shared_address_space);
+  set_gdbarch_gdb_signal_from_target (gdbarch,
+				      linux_gdb_signal_from_target);
+  set_gdbarch_gdb_signal_to_target (gdbarch,
+				    linux_gdb_signal_to_target);
 }
 
 /* Provide a prototype to silence -Wmissing-prototypes.  */
diff --git a/gdb/linux-tdep.h b/gdb/linux-tdep.h
index 380507e..5841f29 100644
--- a/gdb/linux-tdep.h
+++ b/gdb/linux-tdep.h
@@ -34,6 +34,12 @@ char *linux_make_corefile_notes (struct gdbarch *, bfd *, int *,
 
 struct type *linux_get_siginfo_type (struct gdbarch *);
 
+extern enum gdb_signal linux_gdb_signal_from_target (struct gdbarch *gdbarch,
+						     int signal);
+
+extern int linux_gdb_signal_to_target (struct gdbarch *gdbarch,
+				       enum gdb_signal signal);
+
 extern void linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch);
 
 #endif /* linux-tdep.h */
-- 
1.7.11.7

[PATCH 5/7] SPARC support

[Sergio Durigan Junior]

Support for SPARC.  It does not share some signal numbers, therefore
there is the target-specific implementation for them.

2013-07-26  Sergio Durigan Junior  <sergiodj@redhat.com>

	* sparc-linux-tdep.c: Define enum with differences between SPARC
	and x86 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.
---
 gdb/sparc-linux-tdep.c | 137 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 137 insertions(+)

diff --git a/gdb/sparc-linux-tdep.c b/gdb/sparc-linux-tdep.c
index 02c4137..80fafab 100644
--- a/gdb/sparc-linux-tdep.c
+++ b/gdb/sparc-linux-tdep.c
@@ -90,6 +90,31 @@ static const struct tramp_frame sparc32_linux_rt_sigframe =
   sparc32_linux_sigframe_init
 };
 
+/* This enum represents the signals' numbers on the SPARC
+   architecture.  It just contains the signal definitions which are
+   different from x86.
+
+   It is derived from the file <arch/sparc/include/uapi/asm/signal.h>,
+   from the Linux kernel tree.  */
+
+enum
+  {
+    SPARC_LINUX_SIGEMT = 7,
+    SPARC_LINUX_SIGBUS = 10,
+    SPARC_LINUX_SIGSYS = 12,
+    SPARC_LINUX_SIGURG = 16,
+    SPARC_LINUX_SIGSTOP = 17,
+    SPARC_LINUX_SIGTSTP = 18,
+    SPARC_LINUX_SIGCONT = 19,
+    SPARC_LINUX_SIGCHLD = 20,
+    SPARC_LINUX_SIGIO = 23,
+    SPARC_LINUX_SIGPOLL = SPARC_LINUX_SIGIO,
+    SPARC_LINUX_SIGLOST = 29,
+    SPARC_LINUX_SIGPWR = SPARC_LINUX_SIGLOST,
+    SPARC_LINUX_SIGUSR1 = 30,
+    SPARC_LINUX_SIGUSR2 = 31,
+  };
+
 static void
 sparc32_linux_sigframe_init (const struct tramp_frame *self,
 			     struct frame_info *this_frame,
@@ -267,6 +292,113 @@ sparc32_linux_get_syscall_number (struct gdbarch *gdbarch,
 
   return ret;
 }
+/* Implementation of `gdbarch_gdb_signal_from_target', as defined in
+   gdbarch.h.  */
+
+static enum gdb_signal
+sparc32_linux_gdb_signal_from_target (struct gdbarch *gdbarch,
+				      int signal)
+{
+  switch (signal)
+    {
+    case SPARC_LINUX_SIGEMT:
+      return GDB_SIGNAL_EMT;
+
+    case SPARC_LINUX_SIGBUS:
+      return GDB_SIGNAL_BUS;
+
+    case SPARC_LINUX_SIGSYS:
+      return GDB_SIGNAL_SYS;
+
+    case SPARC_LINUX_SIGURG:
+      return GDB_SIGNAL_URG;
+
+    case SPARC_LINUX_SIGSTOP:
+      return GDB_SIGNAL_STOP;
+
+    case SPARC_LINUX_SIGTSTP:
+      return GDB_SIGNAL_TSTP;
+
+    case SPARC_LINUX_SIGCONT:
+      return GDB_SIGNAL_CONT;
+
+    case SPARC_LINUX_SIGCHLD:
+      return GDB_SIGNAL_CHLD;
+
+    /* No way to differentiate between SIGIO and SIGPOLL.
+       Therefore, we just handle the first one.  */
+    case SPARC_LINUX_SIGIO:
+      return GDB_SIGNAL_IO;
+
+    /* No way to differentiate between SIGLOST and SIGPWR.
+       Therefore, we just handle the first one.  */
+    case SPARC_LINUX_SIGLOST:
+      return GDB_SIGNAL_LOST;
+
+    case SPARC_LINUX_SIGUSR1:
+      return GDB_SIGNAL_USR1;
+
+    case SPARC_LINUX_SIGUSR2:
+      return GDB_SIGNAL_USR2;
+    }
+
+  return linux_gdb_signal_from_target (gdbarch, signal);
+}
+
+/* Implementation of `gdbarch_gdb_signal_to_target', as defined in
+   gdbarch.h.  */
+
+static int
+sparc32_linux_gdb_signal_to_target (struct gdbarch *gdbarch,
+				    enum gdb_signal signal)
+{
+  switch (signal)
+    {
+    case GDB_SIGNAL_EMT:
+      return SPARC_LINUX_SIGEMT;
+
+    case GDB_SIGNAL_BUS:
+      return SPARC_LINUX_SIGBUS;
+
+    case GDB_SIGNAL_SYS:
+      return SPARC_LINUX_SIGSYS;
+
+    case GDB_SIGNAL_URG:
+      return SPARC_LINUX_SIGURG;
+
+    case GDB_SIGNAL_STOP:
+      return SPARC_LINUX_SIGSTOP;
+
+    case GDB_SIGNAL_TSTP:
+      return SPARC_LINUX_SIGTSTP;
+
+    case GDB_SIGNAL_CONT:
+      return SPARC_LINUX_SIGCONT;
+
+    case GDB_SIGNAL_CHLD:
+      return SPARC_LINUX_SIGCHLD;
+
+    case GDB_SIGNAL_IO:
+      return SPARC_LINUX_SIGIO;
+
+    case GDB_SIGNAL_POLL:
+      return SPARC_LINUX_SIGPOLL;
+
+    case GDB_SIGNAL_LOST:
+      return SPARC_LINUX_SIGLOST;
+
+    case GDB_SIGNAL_PWR:
+      return SPARC_LINUX_SIGPWR;
+
+    case GDB_SIGNAL_USR1:
+      return SPARC_LINUX_SIGUSR1;
+
+    case GDB_SIGNAL_USR2:
+      return SPARC_LINUX_SIGUSR2;
+    }
+
+  return linux_gdb_signal_to_target (gdbarch, signal);
+}
 
 \f
 
@@ -313,6 +445,11 @@ sparc32_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   set_xml_syscall_file_name (XML_SYSCALL_FILENAME_SPARC32);
   set_gdbarch_get_syscall_number (gdbarch,
                                   sparc32_linux_get_syscall_number);
+
+  set_gdbarch_gdb_signal_from_target (gdbarch,
+				      sparc32_linux_gdb_signal_from_target);
+  set_gdbarch_gdb_signal_to_target (gdbarch,
+				    sparc32_linux_gdb_signal_to_target);
 }
 
 /* Provide a prototype to silence -Wmissing-prototypes.  */
-- 
1.7.11.7

Re: [PATCH 5/7] SPARC support

[Doug Evans]

Hi.  Just a nit.

On Fri, Jul 26, 2013 at 1:13 PM, Sergio Durigan Junior
<sergiodj@redhat.com> wrote:
> Support for SPARC.  It does not share some signal numbers, therefore
> there is the target-specific implementation for them.
>
> 2013-07-26  Sergio Durigan Junior  <sergiodj@redhat.com>
>
>         * sparc-linux-tdep.c: Define enum with differences between SPARC
>         and x86 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.
> [...]
> @@ -267,6 +292,113 @@ sparc32_linux_get_syscall_number (struct gdbarch *gdbarch,
>
>    return ret;
>  }

Nit: Missing blank line here.

> +/* Implementation of `gdbarch_gdb_signal_from_target', as defined in
> +   gdbarch.h.  */
> +
> +static enum gdb_signal
> +sparc32_linux_gdb_signal_from_target (struct gdbarch *gdbarch,
> +                                     int signal)
> +{
> [...]

Re: [PATCH 5/7] SPARC support

[Sergio Durigan Junior]

On Saturday, July 27 2013, Doug Evans wrote:

> Hi.  Just a nit.
>
> On Fri, Jul 26, 2013 at 1:13 PM, Sergio Durigan Junior
> <sergiodj@redhat.com> wrote:
>> Support for SPARC.  It does not share some signal numbers, therefore
>> there is the target-specific implementation for them.
>>
>> 2013-07-26  Sergio Durigan Junior  <sergiodj@redhat.com>
>>
>>         * sparc-linux-tdep.c: Define enum with differences between SPARC
>>         and x86 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.
>> [...]
>> @@ -267,6 +292,113 @@ sparc32_linux_get_syscall_number (struct gdbarch *gdbarch,
>>
>>    return ret;
>>  }
>
> Nit: Missing blank line here.

Fixed, thanks.

-- 
Sergio

Re: [PATCH 0/7] Implement gdbarch_gdb_signal_{to,from}_target

[Doug Evans]

On Fri, Jul 26, 2013 at 1:13 PM, Sergio Durigan Junior
<sergiodj@redhat.com> wrote:
> This is the second attempt to implement gdbarch_gdb_signal_to_target,
> but this time with the additional implementation of
> gdbarch_gdb_signal_from_target (a MIPS-only method so far).
>
> The first attempt is here:
>
> <http://sourceware.org/ml/gdb-patches/2013-07/msg00002.html>
>
> The notable changes are:
>
> - linux-tdep.c now registers the generic converters itself, thus
>   eliminating the need for every target to do so.
>
> - Comment about SIGSWI on ARM (discussion here:
>   <http://sourceware.org/ml/gdb-patches/2013-07/msg00002.html>).
>
> - Rewrite MIPS implementation of gdbarch_gdb_signal_from_target.
>   Remove "enum mips_signals".
>
> Hopefully everything is right now.  If the patch is approved, I intend
> to commit it as a whole, instead of each chunk separately.
>
> Thanks.

Hi.

I reviewed all the patches.
Except for a few nits pointed out in some of the patches, the set is ok with me.
As a sanity check, did you do an enable-targets=all build?
[modulo I didn't audit the signal lists and values]
Also, you may wish to leave it a few days in case others wish to comment.

I gather there is a use for gdbarch_gdb_signal_to_target coming, so no
worries there.

In older times one couldn't use "signal" as a variable name to avoid a
possible collision with a system header defining a macro signal.  I
see record-full.c uses "signal" so perhaps we no longer have to deal
with that, but heads up.

[fwiw, and this is just a side discussion, not meant to block the
patch or anything ...
This is an example of the kind of thing that I wish existed in a
library anyone could use.
Yeah, we're converting to/from GDB_FOO, but I can imagine it being
useful to multiple tools.]

Re: [PATCH 0/7] Implement gdbarch_gdb_signal_{to,from}_target

[Sergio Durigan Junior]

On Saturday, July 27 2013, Doug Evans wrote:

> Hi.

Hi.  Sorry for the delay.

> I reviewed all the patches.
> Except for a few nits pointed out in some of the patches, the set is
> ok with me.

Thanks.

> As a sanity check, did you do an enable-targets=all build?

Yes, I always build my patches this way :-).

> I gather there is a use for gdbarch_gdb_signal_to_target coming, so no
> worries there.

Yep.

> In older times one couldn't use "signal" as a variable name to avoid a
> possible collision with a system header defining a macro signal.  I
> see record-full.c uses "signal" so perhaps we no longer have to deal
> with that, but heads up.

Hm, I wasn't aware of such constraint.  Anyway, since there is a
precedence, then I won't bother changing.

> [fwiw, and this is just a side discussion, not meant to block the
> patch or anything ...
> This is an example of the kind of thing that I wish existed in a
> library anyone could use.
> Yeah, we're converting to/from GDB_FOO, but I can imagine it being
> useful to multiple tools.]

Sounds nice, indeed.  Weekend project, maybe?  :-).

-- 
Sergio

Re: [PATCH 0/7] Implement gdbarch_gdb_signal_{to,from}_target

[Pedro Alves]

On 07/26/2013 09:13 PM, Sergio Durigan Junior wrote:
> This is the second attempt to implement gdbarch_gdb_signal_to_target,
> but this time with the additional implementation of
> gdbarch_gdb_signal_from_target (a MIPS-only method so far).
> 
> The first attempt is here:
> 
> <http://sourceware.org/ml/gdb-patches/2013-07/msg00002.html>
> 
> The notable changes are:
> 
> - linux-tdep.c now registers the generic converters itself, thus
>   eliminating the need for every target to do so.
> 
> - Comment about SIGSWI on ARM (discussion here:
>   <http://sourceware.org/ml/gdb-patches/2013-07/msg00002.html>).
> 
> - Rewrite MIPS implementation of gdbarch_gdb_signal_from_target.
>   Remove "enum mips_signals".
> 
> Hopefully everything is right now.  If the patch is approved, I intend
> to commit it as a whole, instead of each chunk separately.

Thanks.  FAOD, this looks good to me.

-- 
Pedro Alves

Re: [PATCH 0/7] Implement gdbarch_gdb_signal_{to,from}_target

[Sergio Durigan Junior]

On Friday, July 26 2013, I wrote:

> This is the second attempt to implement gdbarch_gdb_signal_to_target,
> but this time with the additional implementation of
> gdbarch_gdb_signal_from_target (a MIPS-only method so far).
>
> The first attempt is here:
>
> <http://sourceware.org/ml/gdb-patches/2013-07/msg00002.html>
>
> The notable changes are:
>
> - linux-tdep.c now registers the generic converters itself, thus
>   eliminating the need for every target to do so.
>
> - Comment about SIGSWI on ARM (discussion here:
>   <http://sourceware.org/ml/gdb-patches/2013-07/msg00002.html>).
>
> - Rewrite MIPS implementation of gdbarch_gdb_signal_from_target.
>   Remove "enum mips_signals".
>
> Hopefully everything is right now.  If the patch is approved, I intend
> to commit it as a whole, instead of each chunk separately.
>
> Thanks.

I have checked-in the patch.

  http://sourceware.org/ml/gdb-cvs/2013-08/msg00042.html

Thanks,

-- 
Sergio