* gdbarch.sh (GET_LONGJMP_TARGET): Add rule.

* gdbarch.c gdbarch.h: Regenerate.
* breakpoint.c (create_longjmp_breakpoint): Always compile this
function.
(breakpoint_reset): Test GET_LONGJMP_TARGET_P().
* infrun.c (GET_LONGJMP_TARGET): Delete default definition.
(handle_inferior_event): Test GET_LONGJMP_TARGET_P().

* arm-tdep.h (struct gdbarch_tdep): Add jb_pc and jb_elt_size fields.
* arm-tdep.c (arm_get_longjmp_target): New function.
(arm_gdbarch_init): Initialize jb_pc to -1.  If ABI handler changes
this to a positive value register arm_get_longjmp_target as the
longjmp handler.
* arm-linux-tdep.c (arm_get_longjmp_target): Delete.
(arm_linux_init_abi): Set up longjmp description in tdep.
* armnbsd-nat.c (get_longjmp_target): Delete.
* armnbsd-tdep.c (arm_netbsd_init_abi_common): Set up longjmp
description in tdep.
* config/arm/tm-nbsd.h (JB_ELEMENT_SIZE, JB_PC): Delete.
(get_longjmp_target): Delete declaration.
(GET_LONGJMP_TARGET): Delete.
* config/arm/tm-linux.h (arm_get_longjmp_target): Delete declaration.
(GET_LONGJMP_TARGET): Delete.

1 files changed, 22 insertions, 0 deletions

diff --git a/gdb/arm-tdep.c b/gdb/arm-tdep.c
index a60f497..7f20267 100644
--- a/gdb/arm-tdep.c
+++ b/gdb/arm-tdep.c
@@ -2272,6 +2272,23 @@ arm_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
   write_register (ARM_A1_REGNUM, addr);
 }
 
+static int
+arm_get_longjmp_target (CORE_ADDR *pc)
+{
+  CORE_ADDR jb_addr;
+  char buf[INT_REGISTER_RAW_SIZE];
+  struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+  
+  jb_addr = read_register (ARM_A1_REGNUM);
+
+  if (target_read_memory (jb_addr + tdep->jb_pc * tdep->jb_elt_size, buf,
+			  INT_REGISTER_RAW_SIZE))
+    return 0;
+
+  *pc = extract_address (buf, INT_REGISTER_RAW_SIZE);
+  return 1;
+}
+
 /* Return non-zero if the PC is inside a thumb call thunk.  */
 
 int
@@ -2775,7 +2792,9 @@ arm_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
 		      "arm_gdbarch_init: bad byte order for float format");
     }
 
+  /* This should be low enough for everything.  */
   tdep->lowest_pc = 0x20;
+  tdep->jb_pc = -1; /* Longjump support not enabled by default.  */
 
   set_gdbarch_use_generic_dummy_frames (gdbarch, 0);
 
@@ -2904,6 +2923,9 @@ arm_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
   /* Now we have tuned the configuration, set a few final things,
      based on what the OS ABI has told us.  */
 
+  if (tdep->jb_pc >= 0)
+    set_gdbarch_get_longjmp_target (gdbarch, arm_get_longjmp_target);
+
   /* We can't use SIZEOF_FRAME_SAVED_REGS here, since that still
      references the old architecture vector, not the one we are
      building here.  */