PR symtab/17391 gdb internal error: assertion fails in regcache.c:178

[deliverable/binutils-gdb.git] / gdb / gdbarch.h

diff --git a/gdb/gdbarch.h b/gdb/gdbarch.h
index 3eb81c152c305cf4d3c3be90cf2ca917f64f92d1..b9b2290c4c63cb6a69cc4415bfee79d207c5912b 100644 (file)
--- a/gdb/gdbarch.h
+++ b/gdb/gdbarch.h
@@ -334,7 +334,8 @@ typedef int (gdbarch_sdb_reg_to_regnum_ftype) (struct gdbarch *gdbarch, int sdb_
 extern int gdbarch_sdb_reg_to_regnum (struct gdbarch *gdbarch, int sdb_regnr);
 extern void set_gdbarch_sdb_reg_to_regnum (struct gdbarch *gdbarch, gdbarch_sdb_reg_to_regnum_ftype *sdb_reg_to_regnum);
 
-/* Provide a default mapping from a DWARF2 register number to a gdb REGNUM. */
+/* Provide a default mapping from a DWARF2 register number to a gdb REGNUM.
+   Return -1 for bad REGNUM.  Note: Several targets get this wrong. */
 
 typedef int (gdbarch_dwarf2_reg_to_regnum_ftype) (struct gdbarch *gdbarch, int dwarf2_regnr);
 extern int gdbarch_dwarf2_reg_to_regnum (struct gdbarch *gdbarch, int dwarf2_regnr);