diff options
Diffstat (limited to 'gdb/spu-tdep.c')
| -rw-r--r-- | gdb/spu-tdep.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/gdb/spu-tdep.c b/gdb/spu-tdep.c index 5e70521..1cc77ad 100644 --- a/gdb/spu-tdep.c +++ b/gdb/spu-tdep.c @@ -40,11 +40,20 @@ #include "regcache.h" #include "reggroups.h" #include "floatformat.h" +#include "block.h" #include "observer.h" #include "spu-tdep.h" +/* The list of available "set spu " and "show spu " commands. */ +static struct cmd_list_element *setspucmdlist = NULL; +static struct cmd_list_element *showspucmdlist = NULL; + +/* Whether to stop for new SPE contexts. */ +static int spu_stop_on_load_p = 0; + + /* The tdep structure. */ struct gdbarch_tdep { @@ -1752,6 +1761,65 @@ spu_overlay_new_objfile (struct objfile *objfile) } +/* Insert temporary breakpoint on "main" function of newly loaded + SPE context OBJFILE. */ +static void +spu_catch_start (struct objfile *objfile) +{ + struct minimal_symbol *minsym; + struct symtab *symtab; + CORE_ADDR pc; + char buf[32]; + + /* Do this only if requested by "set spu stop-on-load on". */ + if (!spu_stop_on_load_p) + return; + + /* Consider only SPU objfiles. */ + if (!objfile || bfd_get_arch (objfile->obfd) != bfd_arch_spu) + return; + + /* The main objfile is handled differently. */ + if (objfile == symfile_objfile) + return; + + /* There can be multiple symbols named "main". Search for the + "main" in *this* objfile. */ + minsym = lookup_minimal_symbol ("main", NULL, objfile); + if (!minsym) + return; + + /* If we have debugging information, try to use it -- this + will allow us to properly skip the prologue. */ + pc = SYMBOL_VALUE_ADDRESS (minsym); + symtab = find_pc_sect_symtab (pc, SYMBOL_OBJ_SECTION (minsym)); + if (symtab != NULL) + { + struct blockvector *bv = BLOCKVECTOR (symtab); + struct block *block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); + struct symbol *sym; + struct symtab_and_line sal; + + sym = lookup_block_symbol (block, "main", NULL, VAR_DOMAIN); + if (sym) + { + fixup_symbol_section (sym, objfile); + sal = find_function_start_sal (sym, 1); + pc = sal.pc; + } + } + + /* Use a numerical address for the set_breakpoint command to avoid having + the breakpoint re-set incorrectly. */ + xsnprintf (buf, sizeof buf, "*%s", core_addr_to_string (pc)); + set_breakpoint (get_objfile_arch (objfile), + buf, NULL /* condition */, + 0 /* hardwareflag */, 1 /* tempflag */, + -1 /* thread */, 0 /* ignore_count */, + 0 /* pending */, 1 /* enabled */); +} + + /* "info spu" commands. */ static void @@ -2321,6 +2389,29 @@ info_spu_command (char *args, int from_tty) } +/* Root of all "set spu "/"show spu " commands. */ + +static void +show_spu_command (char *args, int from_tty) +{ + help_list (showspucmdlist, "show spu ", all_commands, gdb_stdout); +} + +static void +set_spu_command (char *args, int from_tty) +{ + help_list (setspucmdlist, "set spu ", all_commands, gdb_stdout); +} + +static void +show_spu_stop_on_load (struct ui_file *file, int from_tty, + struct cmd_list_element *c, const char *value) +{ + fprintf_filtered (file, _("Stopping for new SPE threads is %s.\n"), + value); +} + + /* Set up gdbarch struct. */ static struct gdbarch * @@ -2442,6 +2533,32 @@ _initialize_spu_tdep (void) observer_attach_new_objfile (spu_overlay_new_objfile); spu_overlay_data = register_objfile_data (); + /* Install spu stop-on-load handler. */ + observer_attach_new_objfile (spu_catch_start); + + /* Add root prefix command for all "set spu"/"show spu" commands. */ + add_prefix_cmd ("spu", no_class, set_spu_command, + _("Various SPU specific commands."), + &setspucmdlist, "set spu ", 0, &setlist); + add_prefix_cmd ("spu", no_class, show_spu_command, + _("Various SPU specific commands."), + &showspucmdlist, "show spu ", 0, &showlist); + + /* Toggle whether or not to add a temporary breakpoint at the "main" + function of new SPE contexts. */ + add_setshow_boolean_cmd ("stop-on-load", class_support, + &spu_stop_on_load_p, _("\ +Set whether to stop for new SPE threads."), + _("\ +Show whether to stop for new SPE threads."), + _("\ +Use \"on\" to give control to the user when a new SPE thread\n\ +enters its \"main\" function.\n\ +Use \"off\" to disable stopping for new SPE threads."), + NULL, + show_spu_stop_on_load, + &setspucmdlist, &showspucmdlist); + /* Add root prefix command for all "info spu" commands. */ add_prefix_cmd ("spu", class_info, info_spu_command, _("Various SPU specific commands."), |