Add a new gdbarch method to print a single AUXV entry.

Different platforms have different meanings for auxiliary vector
entries.  The 'print_auxv_entry' gdbarch method allows an architecture
to output a suitable description for platform-specific entries.

A fprint_auxv_entry function is split out of fprint_target_auxv.
This function outputs the description of a single auxiliary vector
entry to the specified file using caller-supplied formatting and
strings to describe the vector type.

The existing switch on auxiliary vector types is moved out of
fprint_target_auxv into a new default_print_auxv_entry function.
default_print_auxv_entry chooses an appropriate format and description
and calls fprint_single_auxv to describe a single vector entry.
This function is used as the default 'print_auxv_entry' gdbarch method.

fprint_target_auxv now invokes the gdbarch 'print_auxv_entry' method
on each vector entry.

gdb/ChangeLog:

	* auxv.c (fprint_auxv_entry): New function.
	(default_print_auxv_entry): New function.
	(fprint_target_auxv): Use gdbarch_print_auxv_entry.
	* auxv.h (enum auxv_format): New enum.
	(fprint_auxv_entry): Declare.
	(default_print_auxv_entry): Declare.
	* gdbarch.sh (print_auxv_entry): New.
	* gdbarch.c, gdbarch.h: Re-generated.

1 files changed, 24 insertions, 0 deletions

diff --git a/gdb/gdbarch.c b/gdb/gdbarch.c
index 313502b..af7359e 100644
--- a/gdb/gdbarch.c
+++ b/gdb/gdbarch.c
@@ -47,6 +47,7 @@
 #include "observer.h"
 #include "regcache.h"
 #include "objfiles.h"
+#include "auxv.h"
 
 /* Static function declarations */
 
@@ -328,6 +329,7 @@ struct gdbarch
   gdbarch_insn_is_ret_ftype *insn_is_ret;
   gdbarch_insn_is_jump_ftype *insn_is_jump;
   gdbarch_auxv_parse_ftype *auxv_parse;
+  gdbarch_print_auxv_entry_ftype *print_auxv_entry;
   gdbarch_vsyscall_range_ftype *vsyscall_range;
   gdbarch_infcall_mmap_ftype *infcall_mmap;
   gdbarch_infcall_munmap_ftype *infcall_munmap;
@@ -432,6 +434,7 @@ gdbarch_alloc (const struct gdbarch_info *info,
   gdbarch->insn_is_call = default_insn_is_call;
   gdbarch->insn_is_ret = default_insn_is_ret;
   gdbarch->insn_is_jump = default_insn_is_jump;
+  gdbarch->print_auxv_entry = default_print_auxv_entry;
   gdbarch->vsyscall_range = default_vsyscall_range;
   gdbarch->infcall_mmap = default_infcall_mmap;
   gdbarch->infcall_munmap = default_infcall_munmap;
@@ -678,6 +681,7 @@ verify_gdbarch (struct gdbarch *gdbarch)
   /* Skip verify of insn_is_ret, invalid_p == 0 */
   /* Skip verify of insn_is_jump, invalid_p == 0 */
   /* Skip verify of auxv_parse, has predicate.  */
+  /* Skip verify of print_auxv_entry, invalid_p == 0 */
   /* Skip verify of vsyscall_range, invalid_p == 0 */
   /* Skip verify of infcall_mmap, invalid_p == 0 */
   /* Skip verify of infcall_munmap, invalid_p == 0 */
@@ -1167,6 +1171,9 @@ gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file)
                       "gdbarch_dump: pointer_to_address = <%s>\n",
                       host_address_to_string (gdbarch->pointer_to_address));
   fprintf_unfiltered (file,
+                      "gdbarch_dump: print_auxv_entry = <%s>\n",
+                      host_address_to_string (gdbarch->print_auxv_entry));
+  fprintf_unfiltered (file,
                       "gdbarch_dump: print_float_info = <%s>\n",
                       host_address_to_string (gdbarch->print_float_info));
   fprintf_unfiltered (file,
@@ -4769,6 +4776,23 @@ set_gdbarch_auxv_parse (struct gdbarch *gdbarch,
   gdbarch->auxv_parse = auxv_parse;
 }
 
+void
+gdbarch_print_auxv_entry (struct gdbarch *gdbarch, struct ui_file *file, CORE_ADDR type, CORE_ADDR val)
+{
+  gdb_assert (gdbarch != NULL);
+  gdb_assert (gdbarch->print_auxv_entry != NULL);
+  if (gdbarch_debug >= 2)
+    fprintf_unfiltered (gdb_stdlog, "gdbarch_print_auxv_entry called\n");
+  gdbarch->print_auxv_entry (gdbarch, file, type, val);
+}
+
+void
+set_gdbarch_print_auxv_entry (struct gdbarch *gdbarch,
+                              gdbarch_print_auxv_entry_ftype print_auxv_entry)
+{
+  gdbarch->print_auxv_entry = print_auxv_entry;
+}
+
 int
 gdbarch_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *range)
 {