* i386-darwin-tdep.c (darwin_sigtramp_p): New function.
(i386_darwin_sigcontext_addr): Ditto.
(amd64_darwin_sigcontext_addr): Ditto.
(darwin_dwarf_signal_frame_p): Ditto.
(i386_darwin_init_abi): Handle signal frames, use the const for
sc_num_regs.
(x86_darwin_init_abi_64): Ditto.
2009-02-04 Tristan Gingold <gingold@adacore.com>
* machoread.c (macho_symfile_read): Read minsymtab also from
shared libraries.
(macho_symfile_read): Try to read dwarf2 frame info from main
object file, but not from OSO files.
(macho_symfile_offsets): Update section names for latest BFD
changes.
* i386-darwin-tdep.c (i386_darwin_init_abi): Call set_solib_ops.
(x86_darwin_init_abi_64): Ditto.
* solib-darwin.c: New file.
* solib-darwin.h: New file.
* configure.tgt: Add solib.o solib-darwin.o for Darwin.
* machoread.c (macho_symfile_read): Read minsymtab also from
shared libraries.
(macho_symfile_read): Try to read dwarf2 frame info from main
object file, but not from OSO files.
(macho_symfile_offsets): Update section names for latest BFD
changes.
* i386-darwin-tdep.c (i386_darwin_init_abi): Call set_solib_ops.
(x86_darwin_init_abi_64): Ditto.
* solib-darwin.c: New file.
* solib-darwin.h: New file.
* configure.tgt: Add solib.o solib-darwin.o for Darwin.
(SC_PATH_TKCONFIG): Don't exit 0 if tkconfig fails.
(SC_LOAD_TCLCONFIG): Quote all uses of TCL_BIN_DIR, it may contain
"# no Tcl configs found".
(SC_LOAD_TKCONFIG): Similarily for TK_BIN_DIR.
* gdb/configure.ac (gdbkt): Check both no_tcl/no_tk first, before
doing any further tcl/tk configury. Don't configure gdbtk if
tcl or tk check fails.
* gdb/aclocal.m4: Regenerate.
* gdb/configure: Regenerate.
* gdb/gdbtk/plugins/aclocal.m4: Regenerate.
* gdb/gdbtk/plugins/configure: Regenerate.
* target.c (target_waitstatus_to_string): New function. Copied from
debug_to_wait. Add missing entries for TARGET_WAITKIND_SYSCALL_ENTRY,
TARGET_WAITKIND_SYSCALL_RETURN, TARGET_WAITKIND_IGNORE,
TARGET_WAITKIND_NO_HISTORY.
(debug_to_wait): Call it.
* infrun.c (wait_for_inferior): If debug_infrun, print result of
target_wait.
(fetch_inferior_event): Ditto.
(break_command_really, set_breakpoint): New parameter enabled.
(create_breakpoint, break_command_really): Make breakpoint
disabled if so requested.
* breakpoint.h (set_breakpoint): New parameter enabled.
* mi/mi-cmd-break.c (mi_cmd_break_insert): Handle the -d option.
(EAX_REG_NUM,ECX_REG_NUM,EDX_REGNUM,EBX_REG_NUM,ESI_REG_NUM)
(EDI_REG_NUM): New macros.
(MODRM_MOD_FIELD,MODRM_REG_FIELD,MODRM_RM_FIELD): New macros.
(SIB_SCALE_FIELD,SIB_INDEX_FIELD,SIB_BASE_FIELD): New macros.
(REG_PREFIX_P): New macro.
* amd64-tdep.h (amd64_displaced_step_copy_insn): Declare.
(amd64_displaced_step_fixup): Declare.
* amd64-tdep.c: #include opcode/i386.h, dis-asm.h.
(amd64_arch_regmap): Move out of amd64_analyze_stack_align
and make static global.
(amd64_arch_regmap_len): New static global.
(amd64_arch_reg_to_regnum): New function.
(struct amd64_insn): New struct.
(struct displaced_step_closure): New struct.
(onebyte_has_modrm,twobyte_has_modrm): New static globals.
(rex_prefix_p,skip_prefixes)
(amd64_insn_length_fprintf,amd64_insn_length_init_dis)
(amd64_insn_length,amd64_get_unused_input_int_reg)
(amd64_get_insn_details,fixup_riprel,fixup_displaced_copy)
(amd64_displaced_step_copy_insn)
(amd64_absolute_jmp_p,amd64_absolute_call_p,amd64_ret_p)
(amd64_call_p,amd64_breakpoint_p,amd64_syscall_p)
(amd64_displaced_step_fixup): New functions.
* amd64-linux-tdep.c: #include arch-utils.h.
(amd64_linux_init_abi): Install displaced stepping support.
* gdb.arch/amd64-disp-step.S: New file.
* gdb.arch/amd64-disp-step.exp: New file.
* gdb.arch/i386-disp-step.S: New file.
* gdb.arch/i386-disp-step.exp: New file.
parent to the child.
* inf-ttrace.c (inf_ttrace_follow_fork): Likewise.
* inf-ptrace.c (inf_ptrace_follow_fork): Likewise. Use
remove_breakpoints to remove breakpoints from the parent.
finding its unwinder. Use frame_id_build to build the new frame's
id.
* stack.c (parse_frame_specification_1): Correct setting ``addrs''
array values from the ``args'' array values.
(create_array_type, create_set_type, init_flags_type)
(copy_type_recursive): Replace pairs of calls to XALLOC and memset
with a call to XZALLOC or XCALLOC, and pairs of calls to
obstack_alloc and memset with a call to OBSTACK_ZALLOC.
* cli/cli-decode.c (add_setshow_zuinteger_cmd): New.
* cli/cli-setshow.c (do_setshow_command): Handle it.
* command.h (enum var_types): Add var_zuinteger.
(add_setshow_zuinteger_cmd): Declare.
* valprint.c (_initialize_valprint): Change the set input-radix
and set output-radix commands to zuinteger type.
2009-01-23 Pedro Alves <pedro@codesourcery.com>
* gdb.base/radix.exp: Add tests to ensure that that set
input-radix 0 and set output-radix 0 are really rejected.
PR gdb/9664:
* infrun.c (normal_stop): Tag threads as stopped, and run the
hook-stop before printing the stack frame.
2009-01-23 Pedro Alves <pedro@codesourcery.com>
PR gdb/9664:
* gdb.base/hook-stop-frame.c, gdb.base/hook-stop-frame.exp: New.
* infcmd.c (signal_command): Do not specify a resume PC.
testsuite/
PR gdb/9346
* gdb.base/interrupt.c (sigint_handler): New.
(main): Install a SIGINT handler if SIGNALS is defined. Exit
on error.
* gdb.base/interrupt.exp: Define SIGNALS unless gdb,nosignals.
Test "signal SIGINT".
caller_state.
(dummy_frame_push): Replace caller_regcache arg with caller_state.
All callers updated.
(remove_dummy_frame,pop_dummy_frame,lookup_dummy_frame): New fns.
(dummy_frame_pop): Rewrite. Verify requested frame is in the
dummy frame stack. Restore program state.
(cleanup_dummy_frames): Rewrite.
(dummy_frame_sniffer): Update. Make static.
* dummy-frame.h (regcache,frame_info): Delete forward decls.
(inferior_thread_state): New forward decl.
(dummy_frame_push): Update prototype.
* frame.c (frame_pop): dummy_frame_pop now does all the work for
DUMMY_FRAMEs.
* infcall.c (breakpoint_auto_delete_contents): Delete.
(get_function_name,run_inferior_call): New fns.
(call_function_by_hand): Simplify by moving some code to
get_function_name, run_inferior_call. Inferior function call wrapped
in TRY_CATCH so there's less need for cleanups and all exits from
proceed are handled similarily. Detect program exit.
Detect program stopping in a different thread.
Make error messages more consistent.
* inferior.h (inferior_thread_state): Declare (opaque type).
(save_inferior_thread_state,restore_inferior_thread_state,
make_cleanup_restore_inferior_thread_state,
discard_inferior_thread_state, get_inferior_thread_state_regcache):
Declare.
(save_inferior_status): Update prototype.
* infrun.c: (normal_stop): When stopped for the completion of an
inferior function call, verify the expected stack frame kind.
(inferior_thread_state): New struct.
(save_inferior_thread_state,restore_inferior_thread_state,
do_restore_inferior_thread_state_cleanup,
make_cleanup_restore_inferior_thread_state,
discard_inferior_thread_state,
get_inferior_thread_state_regcache): New functions.
(inferior_status): Move stop_signal, stop_pc, registers to
inferior_thread_state. Remove restore_stack_info.
(save_inferior_status): Remove arg restore_stack_info.
All callers updated. Remove saving of state now saved by
save_inferior_thread_state.
(restore_inferior_status): Remove restoration of state now done by
restore_inferior_thread_state.
(discard_inferior_status): Remove freeing of registers, now done by
discard_inferior_thread_state.
* gdb.base/break.exp: Update expected gdb output.
* gdb.base/sepdebug.exp: Ditto.
* gdb.mi/mi-syn-frame.exp: Ditto.
* gdb.mi/mi2-syn-frame.exp: Ditto.
* gdb.base/call-signal-resume.exp: New file.
* gdb.base/call-signals.c: New file.
* gdb.base/unwindonsignal.exp: New file.
* gdb.base/unwindonsignal.c: New file.
* gdb.threads/interrupted-hand-call.exp: New file.
* gdb.threads/interrupted-hand-call.c: New file.
* gdb.threads/thread-unwindonsignal.exp: New file.
* server.c (handle_search_memory): Back out calls to xmalloc,
result is checked and error is returned to user upon failure.
(handle_query): Ditto. Add more checks for result of malloc.
(handle_v_cont): Check result of malloc, report error back to
user upon failure.
(handle_v_run): Ditto. Call freeargv.
* server.h (freeargv): Declare.
* utils.c (freeargv): New fn.
* gdbthread.h (finish_thread_state, finish_thread_state_cleanup):
Declare.
* thread.c (finish_thread_state, finish_thread_state_cleanup): New.
* infrun.c (wait_for_inferior, fetch_inferior_event): If an error
is thrown while handling an event, finish the thread state.
(normal_stop): Use finish_thread_state cleanup.
* infcmd.c (run_command_1): If an error is thrown while starting
the inferior, finish the thread state.
(solib_find): Add prototype.
(solib_bfd_fopen): Add prototype.
* solib.c (solib_find, solib_bfd_fopen): New functions, extracted
from solib_bfd_open.
(solib_bfd_open): Use ops->bfd_open override if present. Call
solib_find and solib_bfd_open otherwise.
* objfiles.h (OBJF_KEEPBFD): New define.
* objfiles.c (free_objfile): Do not close BFD if OBJF_KEEPBFD
objfile flag is set.
* solib.c (symbol_add_stub): Do not allocate second BFD for
shared library; use OBJF_KEEPBFD flag on solib objfile.
(locate_var_value): Remove prototype.
* findvar.c (read_var_value): Do not attempt to default frame
to selected frame.
(locate_var_value): Remove function.
* valops.c (value_of_variable): Retrieve selected frame for
symbols that require a frame when called with NULL block.
* valops.c (address_of_variable): New function.
* eval.c (evaluate_subexp_for_address): Call address_of_variable
instead of calling locate_var_value.
(evaluate_subexp_with_coercion): Likewise.
Carlos O'Donell <carlos@codesourcery.com>
Fixes for makeinfo --html.
* annotate.texinfo: Use @copying and @insertcopying. Use
@ifnottex in place of @ifinfo.
* gdb.texinfo: Use @copying and @insertcopying. Use @ifnottex in
place of @ifinfo. Use @ifnotinfo for one index entry.
* gdbint.texinfo: Use @copying and @insertcopying. Use @ifnottex
in place of @ifinfo.
* stabs.texinfo: Use @copying and @insertcopying. Use @ifnottex
in place of @ifinfo. Include contents at start unconditionally.
using SYMBOL_VALUE_BYTES instead of SYMBOL_VALUE.
(psymtab_to_symtab_1): Likewise.
(parse_procedure): Declare variable "e" only in the scope
where it is used. Extract the symbol private data using
SYMBOL_VALUE_BYTES.
Abstract out common code for copying value locations.
* value.h (set_value_component_location): New declaration.
* value.c (set_value_component_location): New function.
(value_primitive_field): Use it.
* valarith.c (value_subscript, value_subscripted_rvalue): Same.
* valops.c (search_struct_field, value_slice): Same.
* ada-lang.c (coerce_unspec_val_to_type)
(ada_value_primitive_packed_val): Same.
* i386-cygwin-tdep.c: Ditto.
* i386-windows-nat.c: Ditto.
* windows-nat.h: Ditto.
* windows-tdep.c: Ditto.
* windows-tdep.h: Ditto.
* windows-nat.c: Ditto.
(cygwin_load_start): Redefine as CORE_ADDR.
(cygwin_load_end): Ditto.
(windows_make_so): Coerce result of address arithmetic to to uintptr_t before
coercing to CORE_ADDR to avoid a compiler warning.
(handle_exception): Define addr as CORE_ADDR and coerce ExceptionAddress to
uintptr_t before assigining to avoid a compiler warning.
* config/djgpp/fnchange.lst: Add mappings for recently renamed windows files.
print the address of readbuf and writebuf. Cast the address of
elements inside the myaddr buffer into intptr_t.
(deprecated_debug_xfer_memory): Use paddress to print memaddr.
Cast the address of elements inside the myaddr buffer into
intptr_t.
* config/i386/mingw64.mh, config/i386/nm-cygwin64.h: New files.
* configure.host, configure.tgt: Add handling for x86_64/windows.
* config/djgpp/fnchange.lst: Add entries for amd64-windows-nat.c
and amd64-windows-tdep.c.
* i386-cygwin-tdep.h: Delete.
* i386-cygwin-tdep.c: Include win32-tdep.h instead of
i386-cygwin-tdep.h.
(win32_xfer_shared_library): Delete. Moved to win32-tdep.c.
* win32-nat.c: Likewise.
* configure.tgt: Add win32-tdep.o to the list of target object
files for i386-cygwin and i386-mingw targets.
* win32-nat.c (mappings): Initialize to NULL.
(win32_set_context_register_offsets): New function.
* i386-windows-nat.c: New file.
(mappings): Moved here from win32-nat.c.
(_initialize_i386_windows_nat): New function.
* config/i386/mingw.mh (NATDEPFILES): Add i386-windows-nat.o.
* config/i386/cygwin.mh (NATDEPFILES): Likewise.
due to casting a pointer to a long when printing a function
address. Instead, use host_address_to_string to convert our
address to a string.
* gdbarch.c: Regenerate.
"base_address" to LPVOID. Remove unnecessary cast.
(struct lm_info): Change type of load_addr to LPVOID.
(win32_make_so): Change the type of parameter "load_addr"
to LPVOID. Remove some unnecessary casts.
(handle_unload_dll): Change the type of "lpBaseOfDll" to LPVOID.
(win32_xfer_shared_libraries): Add missing cast.
DebugSetProcessKillOnExit. Update all uses in this file.
(kernel32_DebugActiveProcessStop): Renames DebugActiveProcessStop.
Update all uses in this file.
and use it when pushing the target.
(win32_attach, win32_create_inferior): Update call to
do_initial_win32_stuff.
(win32_detach, win32_mourn_inferior): Use our ops parameter
instead of the global win32_ops to unpush the target.
* varobj.c (varobj_invalidate): Unconditionally free
all_rootvarobj.
* symfile.c (syms_from_objfile): Free local_addr when returning
normally.
* exec.c (exec_file_attach): Do cleanups before returning.
(exec_file_command): Likewise.
* corefile.c (reopen_exec_file): Do cleanups before returning.
* breakpoint.c (insert_breakpoint_locations): Do cleanups before
returning.
(do_vec_free): New function.
(update_global_location_list): Make a cleanup for old_locations.
Do cleanups before returning. Remove unused variable 'e'.
(find_condition_and_thread): Free result of parsing the
expression.
(print_it_typical): Do cleanups before returning.
(breakpoint_re_set_one): Always free sals.sals.
2009-01-07 Pedro Alves <pedro@codesourcery.com>
Delete ONE_PROCESS_WRITETEXT leftovers.
* breakpoint.c (insert_bp_location): Delete process_warning
argument. Adjust.
(insert_breakpoint_locations): Adjust.
(reattach_breakpoints): Adjust.
* infrun.c (normal_stop): Drop "It might be running in another
process" notice.
gdb/doc/
2009-01-07 Pedro Alves <pedro@codesourcery.com>
* gdb.texinfo (Error in Breakpoints): Delete mention of "The same
program may be running in another process" errors.
* gdbint.texinfo (Native Conditionals): Delete
ONE_PROCESS_WRITETEXT description.
* f-typeprint.c (f_type_print_base <TYPE_CODE_STRUCT>): Fix output
spacing, a regression from 2008-04-22.
gdb/testsuite/
* gdb.fortran/derived-type.exp: New variables int4 and real4. Match
now the output exactly, using less wildcards. Expect also the output
of gfortran-4.3. Update for the f-valprint.c modification from
2008-04-22.
* gdb.fortran/subarray.exp: Expect also the output of gfortran-4.3.
Remove gdb_test test names where matching the command.
emacs local variable to be placed at the end of the ChangeLog.
Add server.c and gdbreplay.c to the list of files where the
copyright year needs to be updated.
attribute in GLIBC 2.8.
* cli/cli-cmds.c (pwd_command): Check return value from getcwd.
* inflow.c (check_syscall): New function.
(new_tty): Use check_syscall to check return values from open and dup.
* linux-nat.c (linux_nat_info_proc_cmd): Check return value from fgets.
* main.c (captured_main): Call cwd after setting up gdb_stderr;
check for errors from getcwd.
* mi/mi-cmd-env.c (mi_cmd_env_pwd): Check return value from getcwd.
* ui-file.c (stdio_file_write): Ignore return value from fwrite.
(stdio_file_fputs): Same.
* utils.c (internal_vproblem): abort if last-ditch error message
write fails.
gdb/
* ser-tcp.c: Adjust includes.
(tcp_set_cmdlist, tcp_show_cmdlist): Declare.
(tcp_auto_retry, tcp_retry_limit): Declare.
(TIMEOUT): Remove, in favor of tcp_retry_limit.
(POLL_INTERVAL): Increase to 5, in favor of backoff logic.
(wait_for_connect): New function.
(net_open): Use it. Add auto-retry logic.
(set_tcp_cmd, show_tcp_cmd): New functions.
(_initialize_ser_tcp): Initialize new "set/show tcp auto-retry"
and "set/show tcp connect-timeout" commands.
* NEWS: Document new commands.
gdb/doc/
* gdb.texinfo (Remote Configuration): Document new
"set/show tcp auto-retry" and "set/show tcp connect-timeout"
commands.
PR gdb/8812:
* infrun.c (handle_command): Don't print a header or notify the
target about signal changes if we didn't change any signal.
2008-12-31 Pedro Alves <pedro@codesourcery.com>
PR gdb/8812:
* gdb.base/signal.exp: Change kfail to fail, and update PR number.
PR gdb/7536:
* valprint.c (input_radix_1): New static global.
(set_input_radix): Use it instead of "input_radix".
(set_input_radix_1): Always leave input_radix_1 set to
input_radix.
(output_radix_1): New static global.
(set_output_radix): Use it instead of "output_radix".
(set_output_radix_1): Always leave output_radix_1 set to
output_radix.
(_initialize_valprint): Use "input_radix_1" instead of
"input_radix" with the "input-radix" command. Use
"output_radix_1" instead of "output_radix" with the "output-radix"
command.
2008-12-29 Pedro Alves <pedro@codesourcery.com>
PR gdb/7536:
* gdb.base/radix.exp: Add tests to ensure invalid input radices
and unsupported output radices are really rejected.
* linux-fork.h (linux_fork_detach): Declare.
* linux-nat.c (linux_child_follow_fork): When following the fork
child, add the child inferior before possibly detaching from the
parent. Don't reinstall ourselves.
(linux_nat_detach): Call linux_fork_detach if there are other
forks to debug.
* linux-thread-db.c (thread_db_detach): Don't call
target_mourn_inferior. Instead inline the necessary bits.
* inf-ptrace.c (inf_ptrace_detach): Don't unpush the target if
there are other inferiors to debug.
preparation for supporting DW_AT_byte_stride.
* ada-lang.c (packed_array_type, ada_index_type): Use TYPE_INDEX_TYPE.
(ada_array_bound_from_type): Move `index_type' declaration to the
function start. New variable `retval'. Return the bounds for
TYPE_CODE_RANGE using TYPE_LOW_BOUND and TYPE_HIGH_BOUND. Abort on
invalid index type codes.
* ada-typeprint.c (print_range): Set `upper_bound' for TYPE_CODE_RANGE
now using TYPE_HIGH_BOUND.
* ada-valprint.c (val_print_packed_array_elements): Use `index_type'.
* eval.c (evaluate_subexp_standard): Use TYPE_INDEX_TYPE.
* gdbtypes.c (create_range_type): Use TYPE_LOW_BOUND, TYPE_HIGH_BOUND,
refer to the number of fields only through TYPE_NFIELDS.
(create_array_type): Use TYPE_INDEX_TYPE.
(check_typedef): Use TYPE_INDEX_TYPE, TYPE_LOW_BOUND, TYPE_HIGH_BOUND.
* gdbtypes.h (TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED)
(TYPE_ARRAY_LOWER_BOUND_IS_UNDEFINED): Use TYPE_INDEX_TYPE.
(TYPE_ARRAY_UPPER_BOUND_VALUE, TYPE_ARRAY_LOWER_BOUND_VALUE): Use
TYPE_INDEX_TYPE, TYPE_LOW_BOUND, TYPE_HIGH_BOUND,
* hppa-tdep.c (hppa_alignof <TYPE_CODE_ARRAY>): Use TYPE_INDEX_TYPE.
* mdebugread.c (parse_type): Use TYPE_LOW_BOUND, TYPE_HIGH_BOUND,
* valarith.c (value_bit_index): Use TYPE_INDEX_TYPE.
Update for call to print_variable_and_value.
(print_frame_arg_vars): Update.
* value.h (print_variable_and_value): Rename from
print_variable_value. Add 'name' and 'indent' parameters.
* printcmd.c (print_variable_and_value): Rename from
print_variable_value. Add 'name' and 'indent' parameters. Use
common_val_print.
* f-valprint.c (info_common_command): Update.
Fix memory double-free.
* completer.c (line_completion_function): Clear LIST after called xfree.
gdb/testsuite/
* gdb.base/completion.exp (Completing non-existing component): New test.
Fix hw watchpoints created before the inferior was started.
* breakpoint.c (update_watchpoint): Convert the bp_watchpoint and
bp_hardware_watchpoint types according to the current runtime state.
gdb/testsuite/
* gdb.base/watchpoint-hw.exp, gdb.base/watchpoint-hw.c: New.
and not detaching the parent, also add the child fork to the fork
list.
* linux-fork.c (linux_fork_context): Remove dead error call.
Assert that the incoming newfp argument is not null. Do not add a
new fork for inferior_ptid. Assert that there is one already.
(ada_value_slice_from_ptr): ... this. Return a lazy value instead
of a reference. Update comment.
(ada_value_struct_elt): Ditto if arg is a pointer or a reference.
Update comment as well.
(ada_evaluate_subexp): Update use of ada_value_slice_ptr.
PR cli/2563:
* cli/cli-decode.c (delete_cmd): Add hook-related out parameters.
(add_cmd): Update. Install hooks into new command.
(add_alias_cmd): Update.
gdb/testsuite
* gdb.base/commands.exp (redefine_hook_test): New proc.
Call it.
TARGET_WAITKIND_SIGNALLED, switch inferior_ptid to the event ptid.
* linux_thread_db.c (thread_db_wait): On a TARGET_WAITKIND_EXITED
or TARGET_WAITKIND_SIGNALLED, return the ptid the beneath target
returned.
* inf-ptrace.c (inf_ptrace_wait): Return inferior_ptid instead of
minus_one_ptid if the inferior disappeared.
* rs6000-nat.c (rs6000_wait): Likewise.
* spu-linux-nat.c (spu_child_wait): Likewise.
PR gdb/1815:
* cli/cli-decode.c (delete_cmd): Forward declare.
(delete_cmd): Now static. Change return type. Remove command
from alias chain. Rewrite.
(add_cmd): Initialize new fields. Update cmd_pointer on all
aliases.
(add_alias_cmd): Put command on alias chain.
* command.h (delete_cmd): Don't declare.
* cli/cli-decode.h (delete_cmd): Don't declare.
(struct cmd_list_element) <aliases, alias_chain>: New fields.
gdb/testsuite
* gdb.base/commands.exp (redefine_backtrace_test): New proc.
Call it.
* breakpoint.c (allocate_bp_location): Remove the bp_type parameter.
Replace bp_type by bpt->type. Update prototype. All callers updated.
(add_location_to_breakpoint): Remove the bp_type parameter.
Replace bp_type by b->type. All callers updated.
(set_breakpoint_location_function): Replace bptype by b->type.
* i386-darwin-nat.c (i386_darwin_sstep_at_sigreturn): New function.
(amd64_darwin_sstep_at_sigreturn): New function.
(darwin_set_sstep): The sigreturn is a special case: the trace flag
must be set in the mcontext structure.
