Add regcache_map_supplies helper routine.

This helper can be used in the fetch_registers and store_registers
target methods to determine if a register set includes a specific
register.

1 files changed, 9 insertions, 0 deletions

diff --git a/gdb/regcache.h b/gdb/regcache.h
index ee254f3..cd2e441 100644
--- a/gdb/regcache.h
+++ b/gdb/regcache.h
@@ -150,6 +150,15 @@ extern void regcache_collect_regset (const struct regset *regset,
 				     int regnum, void *buf, size_t size);
 
 
+/* Return true if a set of registers contains the value of the
+   register numbered REGNUM.  The size of the set of registers is
+   given in SIZE, and the layout of the set of registers is described
+   by MAP.  */
+
+extern bool regcache_map_supplies (const struct regcache_map_entry *map,
+				   int regnum, struct gdbarch *gdbarch,
+				   size_t size);
+
 /* The type of a register.  This function is slightly more efficient
    then its gdbarch vector counterpart since it returns a precomputed
    value stored in a table.  */