diff options
Diffstat (limited to 'gdb/arc-tdep.c')
| -rw-r--r-- | gdb/arc-tdep.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/gdb/arc-tdep.c b/gdb/arc-tdep.c index 58de8e9..c848dc2 100644 --- a/gdb/arc-tdep.c +++ b/gdb/arc-tdep.c @@ -557,6 +557,28 @@ arc_store_return_value (struct gdbarch *gdbarch, struct type *type, error (_("arc_store_return_value: type length too large.")); } +/* Implement the "get_longjmp_target" gdbarch method. */ + +static int +arc_get_longjmp_target (struct frame_info *frame, CORE_ADDR *pc) +{ + if (arc_debug) + debug_printf ("arc: get_longjmp_target\n"); + + struct gdbarch *gdbarch = get_frame_arch (frame); + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); + int pc_offset = tdep->jb_pc * ARC_REGISTER_SIZE; + gdb_byte buf[ARC_REGISTER_SIZE]; + CORE_ADDR jb_addr = get_frame_register_unsigned (frame, ARC_FIRST_ARG_REGNUM); + + if (target_read_memory (jb_addr + pc_offset, buf, ARC_REGISTER_SIZE)) + return 0; /* Failed to read from memory. */ + + *pc = extract_unsigned_integer (buf, ARC_REGISTER_SIZE, + gdbarch_byte_order (gdbarch)); + return 1; +} + /* Implement the "return_value" gdbarch method. */ static enum return_value_convention @@ -1162,6 +1184,7 @@ arc_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) /* Allocate the ARC-private target-dependent information structure, and the GDB target-independent information structure. */ struct gdbarch_tdep *tdep = XCNEW (struct gdbarch_tdep); + tdep->jb_pc = -1; /* No longjmp support by default. */ struct gdbarch *gdbarch = gdbarch_alloc (&info, tdep); /* Data types. */ @@ -1246,6 +1269,9 @@ arc_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) It can override functions set earlier. */ gdbarch_init_osabi (info, gdbarch); + if (tdep->jb_pc >= 0) + set_gdbarch_get_longjmp_target (gdbarch, arc_get_longjmp_target); + tdesc_use_registers (gdbarch, tdesc, tdesc_data); return gdbarch; @@ -1256,7 +1282,9 @@ arc_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) static void arc_dump_tdep (struct gdbarch *gdbarch, struct ui_file *file) { - /* Empty for now. */ + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); + + fprintf_unfiltered (file, "arc_dump_tdep: jb_pc = %i\n", tdep->jb_pc); } /* Suppress warning from -Wmissing-prototypes. */ |