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[commit] mn10300: Register a dwarf2_reg_to_regnum function
- From: Kevin Buettner <kevinb at redhat dot com>
- To: gdb-patches at sources dot redhat dot com
- Cc: Michael Snyder <msnyder at redhat dot com>
- Date: Fri, 2 Sep 2005 18:09:15 -0700
- Subject: [commit] mn10300: Register a dwarf2_reg_to_regnum function
I've just committed the change below.
This code used to be in the old version of mn10300-tdep.c. It's absence
from the current version of mn10300-tdep.c is an oversight. When I asked
Michael Snyder about it a while back, he asked me to reinstate it. So
here it is...
* mn10300-tdep.c (mn10300_dwarf2_reg_to_regnum): New function.
(mn10300_gdbarch_init): Register mn10300_dwarf2_reg_to_regnum().
Index: mn10300-tdep.c
===================================================================
RCS file: /cvs/src/src/gdb/mn10300-tdep.c,v
retrieving revision 1.128
diff -u -p -r1.128 mn10300-tdep.c
--- mn10300-tdep.c 3 Sep 2005 00:49:06 -0000 1.128
+++ mn10300-tdep.c 3 Sep 2005 01:02:48 -0000
@@ -937,6 +937,37 @@ mn10300_push_dummy_call (struct gdbarch
return sp;
}
+/* If DWARF2 is a register number appearing in Dwarf2 debug info, then
+ mn10300_dwarf2_reg_to_regnum (DWARF2) is the corresponding GDB
+ register number. Why don't Dwarf2 and GDB use the same numbering?
+ Who knows? But since people have object files lying around with
+ the existing Dwarf2 numbering, and other people have written stubs
+ to work with the existing GDB, neither of them can change. So we
+ just have to cope. */
+static int
+mn10300_dwarf2_reg_to_regnum (int dwarf2)
+{
+ /* This table is supposed to be shaped like the REGISTER_NAMES
+ initializer in gcc/config/mn10300/mn10300.h. Registers which
+ appear in GCC's numbering, but have no counterpart in GDB's
+ world, are marked with a -1. */
+ static int dwarf2_to_gdb[] = {
+ 0, 1, 2, 3, 4, 5, 6, 7, -1, 8,
+ 15, 16, 17, 18, 19, 20, 21, 22,
+ 32, 33, 34, 35, 36, 37, 38, 39,
+ 40, 41, 42, 43, 44, 45, 46, 47,
+ 48, 49, 50, 51, 52, 53, 54, 55,
+ 56, 57, 58, 59, 60, 61, 62, 63
+ };
+
+ if (dwarf2 < 0
+ || dwarf2 >= (sizeof (dwarf2_to_gdb) / sizeof (dwarf2_to_gdb[0]))
+ || dwarf2_to_gdb[dwarf2] == -1)
+ internal_error (__FILE__, __LINE__,
+ "bogus register number in debug info: %d", dwarf2);
+
+ return dwarf2_to_gdb[dwarf2];
+}
static struct gdbarch *
mn10300_gdbarch_init (struct gdbarch_info info,
@@ -977,6 +1008,7 @@ mn10300_gdbarch_init (struct gdbarch_inf
set_gdbarch_write_pc (gdbarch, mn10300_write_pc);
set_gdbarch_pc_regnum (gdbarch, E_PC_REGNUM);
set_gdbarch_sp_regnum (gdbarch, E_SP_REGNUM);
+ set_gdbarch_dwarf2_reg_to_regnum (gdbarch, mn10300_dwarf2_reg_to_regnum);
/* Stack unwinding. */
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);