Use bool in pc_in_* functions

I noticed that pc_in_unmapped_range had a weird return type -- it was
returning a CORE_ADDR but intending to return a bool.  This patch
changes all the pc_in_* functions to return bool instead.

gdb/gdbthread.h

@@ -892,7 +892,7 @@ extern void delete_exited_threads (void);
 
 /* Return true if PC is in the stepping range of THREAD.  */
 
-int pc_in_thread_step_range (CORE_ADDR pc, struct thread_info *thread);
+bool pc_in_thread_step_range (CORE_ADDR pc, struct thread_info *thread);
 
 /* Enable storing stack temporaries for thread THR and disable and
    clear the stack temporaries on destruction.  Holds a strong

gdb/objfiles.c

@@ -1208,18 +1208,13 @@ find_pc_section (CORE_ADDR pc)
 
 /* Return non-zero if PC is in a section called NAME.  */
 
-int
+bool
 pc_in_section (CORE_ADDR pc, const char *name)
 {
-  struct obj_section *s;
-  int retval = 0;
-
-  s = find_pc_section (pc);
-
-  retval = (s != NULL
-	    && s->the_bfd_section->name != NULL
-	    && strcmp (s->the_bfd_section->name, name) == 0);
-  return (retval);
+  struct obj_section *s = find_pc_section (pc);
+  return (s != nullptr
+	  && s->the_bfd_section->name != nullptr
+	  && strcmp (s->the_bfd_section->name, name) == 0);
 }
 
 

gdb/objfiles.h

@@ -891,8 +891,8 @@ extern int have_minimal_symbols (void);
 
 extern struct obj_section *find_pc_section (CORE_ADDR pc);
 
-/* Return non-zero if PC is in a section called NAME.  */
-extern int pc_in_section (CORE_ADDR, const char *);
+/* Return true if PC is in a section called NAME.  */
+extern bool pc_in_section (CORE_ADDR, const char *);
 
 /* Return non-zero if PC is in a SVR4-style procedure linkage table
    section.  */

gdb/symfile.c

@@ -3022,7 +3022,7 @@ section_is_mapped (struct obj_section *osect)
 /* Function: pc_in_unmapped_range
    If PC falls into the lma range of SECTION, return true, else false.  */
 
-CORE_ADDR
+bool
 pc_in_unmapped_range (CORE_ADDR pc, struct obj_section *section)
 {
   if (section_is_overlay (section))
@@ -3035,26 +3035,26 @@ pc_in_unmapped_range (CORE_ADDR pc, struct obj_section *section)
 
       if (bfd_section_lma (bfd_section) + offset <= pc
 	  && pc < bfd_section_lma (bfd_section) + offset + size)
-	return 1;
+	return true;
     }
 
-  return 0;
+  return false;
 }
 
 /* Function: pc_in_mapped_range
    If PC falls into the vma range of SECTION, return true, else false.  */
 
-CORE_ADDR
+bool
 pc_in_mapped_range (CORE_ADDR pc, struct obj_section *section)
 {
   if (section_is_overlay (section))
     {
       if (section->addr () <= pc
 	  && pc < section->endaddr ())
-	return 1;
+	return true;
     }
 
-  return 0;
+  return false;
 }
 
 /* Return true if the mapped ranges of sections A and B overlap, false

gdb/symfile.h

@@ -296,10 +296,10 @@ extern int section_is_overlay (struct obj_section *);
 extern int section_is_mapped (struct obj_section *);
 
 /* Return true if pc belongs to section's VMA.  */
-extern CORE_ADDR pc_in_mapped_range (CORE_ADDR, struct obj_section *);
+extern bool pc_in_mapped_range (CORE_ADDR, struct obj_section *);
 
 /* Return true if pc belongs to section's LMA.  */
-extern CORE_ADDR pc_in_unmapped_range (CORE_ADDR, struct obj_section *);
+extern bool pc_in_unmapped_range (CORE_ADDR, struct obj_section *);
 
 /* Map an address from a section's LMA to its VMA.  */
 extern CORE_ADDR overlay_mapped_address (CORE_ADDR, struct obj_section *);

gdb/thread.c

@@ -968,7 +968,7 @@ can_access_registers_thread (thread_info *thread)
   return true;
 }
 
-int
+bool
 pc_in_thread_step_range (CORE_ADDR pc, struct thread_info *thread)
 {
   return (pc >= thread->control.step_range_start