Convert fatal to gdb_assert in both i386_dr_low_set_addr

This commit converts if..fatal checks in both i386_dr_low_set_addr
implementations to gdb_asserts.  It's not obvious from the context,
but the conditional in both cases is changed to match the equivalent
conditional in the i386_dr_low_get_addr implementations.  Nothing
fundamental has changed because DR_FIRSTADDR is zero.  This commit
also removes a vague comment in Linux i386_dr_low_get_addr.  I could
have reworded the comment (and replicated it three times for the other
identical assertions) but I think the existence of specific functions
for the status and control registers makes it fairly obvious what is
going on.

gdb/gdbserver/ChangeLog:

	* linux-x86-low.c (i386_dr_low_set_addr): Replace check with
	gdb_assert.
	(i386_dr_low_get_addr): Remove vague comment.
	* win32-i386-low.c (i386_dr_low_set_addr): Replace check with
	gdb_assert.

1 files changed, 1 insertions, 3 deletions

diff --git a/gdb/gdbserver/linux-x86-low.c b/gdb/gdbserver/linux-x86-low.c
index a47fcbe..5175019 100644
--- a/gdb/gdbserver/linux-x86-low.c
+++ b/gdb/gdbserver/linux-x86-low.c
@@ -592,8 +592,7 @@ i386_dr_low_set_addr (int regnum, CORE_ADDR addr)
   /* Only update the threads of this process.  */
   int pid = pid_of (current_inferior);
 
-  if (! (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR))
-    fatal ("Invalid debug register %d", regnum);
+  gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);
 
   find_inferior (&all_threads, update_debug_registers_callback, &pid);
 }
@@ -605,7 +604,6 @@ i386_dr_low_get_addr (int regnum)
 {
   ptid_t ptid = ptid_of (current_inferior);
 
-  /* DR6 and DR7 are retrieved with some other way.  */
   gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);
 
   return x86_linux_dr_get (ptid, regnum);