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[RFA] Testing REGISTER_NAME in mips-linux-nat.c
- From: fnf at intrinsity dot com (Fred Fish)
- To: gdb-patches at sources dot redhat dot com
- Cc: fnf at intrinsity dot com (Fred Fish)
- Date: Fri, 27 Jun 2003 12:20:13 -0500 (CDT)
- Subject: [RFA] Testing REGISTER_NAME in mips-linux-nat.c
- Reply-to: fnf at intrinsity dot com (Fred Fish)
A recent change to mips_register_name to return a empty string for
register numbers < NUM_REGS is causing problems with the native mips
linux port. The change in mips_register_name is:
+ /* Map [NUM_REGS .. 2*NUM_REGS) onto the raw registers, but then
+ don't make the raw register names visible. */
+ int rawnum = regno % NUM_REGS;
+ if (regno < NUM_REGS)
+ return "";
Now for example when mips_linux_cannot_fetch_register() is called with
regno == PC_REGNUM, it will return 1 and reading of the PC will return
zero as the PC value.
I think this is the correct patch, but I'm not 100% sure. Perhaps we
can just eliminate the REGISTER_NAME check completely.
-Fred
============================================================================
2003-06-27 Fred Fish <fnf@intrinsity.com>
* mips-linux-nat.c (mips_linux_cannot_fetch_register): Only test
register name if it is a pseudo register.
Index: mips-linux-nat.c
===================================================================
RCS file: /mips/newtools/fsf/gdb/gdb/mips-linux-nat.c,v
retrieving revision 1.2
diff -c -p -r1.2 mips-linux-nat.c
*** mips-linux-nat.c 2003/02/18 21:36:24 1.2
--- mips-linux-nat.c 2003/06/27 17:11:38
***************
*** 29,35 ****
int
mips_linux_cannot_fetch_register (int regno)
{
! if (REGISTER_NAME (regno)[0] == 0)
return 1;
if (regno == PS_REGNUM)
return 1;
--- 29,35 ----
int
mips_linux_cannot_fetch_register (int regno)
{
! if (regno >= NUM_REGS && REGISTER_NAME (regno)[0] == 0)
return 1;
if (regno == PS_REGNUM)
return 1;
*************** mips_linux_cannot_fetch_register (int re
*** 42,48 ****
int
mips_linux_cannot_store_register (int regno)
{
! if (REGISTER_NAME (regno)[0] == 0)
return 1;
if (regno == PS_REGNUM)
return 1;
--- 42,48 ----
int
mips_linux_cannot_store_register (int regno)
{
! if (regno >= NUM_REGS && REGISTER_NAME (regno)[0] == 0)
return 1;
if (regno == PS_REGNUM)
return 1;