gdbarch_breakpoint_from_pc doesn't return NULL

gdbarch_breakpoint_from_pc doesn't return NULL except for
ia64_breakpoint_from_pc, and we checked its return value in three
places. In microblaze_linux_memory_remove_breakpoint and
ppc_linux_memory_remove_breakpoint, gdbarch_breakpoint_from_pc never
returns NULL, so we can remove the NULL checking.  In
default_memory_insert_breakpoint, gdbarch_breakpoint_from_pc can't
returns NULL too because ia64 defines its own memory_insert_breakpoint.

gdb:

2016-11-03  Yao Qi  <yao.qi@linaro.org>

	* mem-break.c (default_memory_insert_breakpoint): Don't check
	'bp' against NULL.
	* microblaze-linux-tdep.c (microblaze_linux_memory_remove_breakpoint):
	Likewise.
	* ppc-linux-tdep.c (ppc_linux_memory_remove_breakpoint): Likewise.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 8ce6132..92fdd69 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,11 @@
+2016-11-03  Yao Qi  <yao.qi@linaro.org>
+
+       * mem-break.c (default_memory_insert_breakpoint): Don't check
+       'bp' against NULL.
+       * microblaze-linux-tdep.c (microblaze_linux_memory_remove_breakpoint):
+       Likewise.
+       * ppc-linux-tdep.c (ppc_linux_memory_remove_breakpoint): Likewise.
+
 2016-11-02  Tom Tromey  <tom@tromey.com>
 
        * dwarf2loc.c (dwarf_evaluate_loc_desc::get_base_type): Rename

diff --git a/gdb/mem-break.c b/gdb/mem-break.c
index 803f62b..cc8145c 100644 (file)
--- a/gdb/mem-break.c
+++ b/gdb/mem-break.c
@@ -45,8 +45,6 @@ default_memory_insert_breakpoint (struct gdbarch *gdbarch,
 
   /* Determine appropriate breakpoint contents and size for this address.  */
   bp = gdbarch_breakpoint_from_pc (gdbarch, &addr, &bplen);
-  if (bp == NULL)
-    error (_("Software breakpoints not implemented for this target."));
 
   bp_tgt->placed_address = addr;
   bp_tgt->placed_size = bplen;

diff --git a/gdb/microblaze-linux-tdep.c b/gdb/microblaze-linux-tdep.c
index 18ddfea..22e5959 100644 (file)
--- a/gdb/microblaze-linux-tdep.c
+++ b/gdb/microblaze-linux-tdep.c
@@ -49,8 +49,6 @@ microblaze_linux_memory_remove_breakpoint (struct gdbarch *gdbarch,
 
   /* Determine appropriate breakpoint contents and size for this address.  */
   bp = gdbarch_breakpoint_from_pc (gdbarch, &addr, &bplen);
-  if (bp == NULL)
-    error (_("Software breakpoints not implemented for this target."));
 
   val = target_read_memory (addr, old_contents, bplen);
 

diff --git a/gdb/ppc-linux-tdep.c b/gdb/ppc-linux-tdep.c
index ee158e3..9c0b8fc 100644 (file)
--- a/gdb/ppc-linux-tdep.c
+++ b/gdb/ppc-linux-tdep.c
@@ -222,8 +222,6 @@ ppc_linux_memory_remove_breakpoint (struct gdbarch *gdbarch,
 
   /* Determine appropriate breakpoint contents and size for this address.  */
   bp = gdbarch_breakpoint_from_pc (gdbarch, &addr, &bplen);
-  if (bp == NULL)
-    error (_("Software breakpoints not implemented for this target."));
 
   /* Make sure we see the memory breakpoints.  */
   cleanup = make_show_memory_breakpoints_cleanup (1);