diff options
Diffstat (limited to 'gdb')
| -rw-r--r-- | gdb/ChangeLog | 6 | ||||
| -rw-r--r-- | gdb/gdbarch.h | 23 | ||||
| -rwxr-xr-x | gdb/gdbarch.sh | 23 | ||||
| -rw-r--r-- | gdb/infcall.c | 29 |
4 files changed, 63 insertions, 18 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index b432114..6b19374 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,9 @@ +2018-11-16 Alan Hayward <alan.hayward@arm.com> + + * gdbarch.sh (enum function_call_return_method): Add enum. + * gdbarch.h: Regenerate. + * infcall.c (call_function_by_hand_dummy): Replace vars with enum. + 2018-11-15 Joel Brobecker <brobecker@adacore.com> * unittests/copy_bitwise-selftests.c: New file. diff --git a/gdb/gdbarch.h b/gdb/gdbarch.h index 2cb6961..e8e35fb 100644 --- a/gdb/gdbarch.h +++ b/gdb/gdbarch.h @@ -102,6 +102,29 @@ typedef void (iterate_over_regset_sections_cb) (const char *sect_name, int supply_size, int collect_size, const struct regset *regset, const char *human_name, void *cb_data); +/* For a function call, does the function return a value using a + normal value return or a structure return - passing a hidden + argument pointing to storage. For the latter, there are two + cases: language-mandated structure return and target ABI + structure return. */ + +enum function_call_return_method +{ + /* Standard value return. */ + return_method_normal = 0, + + /* Language ABI structure return. This is handled + by passing the return location as the first parameter to + the function, even preceding "this". */ + return_method_hidden_param, + + /* Target ABI struct return. This is target-specific; for instance, + on ia64 the first argument is passed in out0 but the hidden + structure return pointer would normally be passed in r8. */ + return_method_struct, +}; + + /* The following are pre-initialized by GDBARCH. */ diff --git a/gdb/gdbarch.sh b/gdb/gdbarch.sh index bbfa8d2..1e895c3 100755 --- a/gdb/gdbarch.sh +++ b/gdb/gdbarch.sh @@ -1327,6 +1327,29 @@ typedef int (iterate_over_objfiles_in_search_order_cb_ftype) typedef void (iterate_over_regset_sections_cb) (const char *sect_name, int supply_size, int collect_size, const struct regset *regset, const char *human_name, void *cb_data); + +/* For a function call, does the function return a value using a + normal value return or a structure return - passing a hidden + argument pointing to storage. For the latter, there are two + cases: language-mandated structure return and target ABI + structure return. */ + +enum function_call_return_method +{ + /* Standard value return. */ + return_method_normal = 0, + + /* Language ABI structure return. This is handled + by passing the return location as the first parameter to + the function, even preceding "this". */ + return_method_hidden_param, + + /* Target ABI struct return. This is target-specific; for instance, + on ia64 the first argument is passed in out0 but the hidden + structure return pointer would normally be passed in r8. */ + return_method_struct, +}; + EOF # function typedef's diff --git a/gdb/infcall.c b/gdb/infcall.c index 96d4370..0c875ea 100644 --- a/gdb/infcall.c +++ b/gdb/infcall.c @@ -719,7 +719,7 @@ call_function_by_hand_dummy (struct value *function, { CORE_ADDR sp; struct type *target_values_type; - unsigned char struct_return = 0, hidden_first_param_p = 0; + function_call_return_method return_method = return_method_normal; CORE_ADDR struct_addr = 0; CORE_ADDR real_pc; CORE_ADDR bp_addr; @@ -876,20 +876,11 @@ call_function_by_hand_dummy (struct value *function, values_type = check_typedef (values_type); - /* Are we returning a value using a structure return (passing a - hidden argument pointing to storage) or a normal value return? - There are two cases: language-mandated structure return and - target ABI structure return. The variable STRUCT_RETURN only - describes the latter. The language version is handled by passing - the return location as the first parameter to the function, - even preceding "this". This is different from the target - ABI version, which is target-specific; for instance, on ia64 - the first argument is passed in out0 but the hidden structure - return pointer would normally be passed in r8. */ + /* Are we returning a value using a structure return? */ if (gdbarch_return_in_first_hidden_param_p (gdbarch, values_type)) { - hidden_first_param_p = 1; + return_method = return_method_hidden_param; /* Tell the target specific argument pushing routine not to expect a value. */ @@ -897,7 +888,8 @@ call_function_by_hand_dummy (struct value *function, } else { - struct_return = using_struct_return (gdbarch, function, values_type); + if (using_struct_return (gdbarch, function, values_type)) + return_method = return_method_struct; target_values_type = values_type; } @@ -1020,7 +1012,7 @@ call_function_by_hand_dummy (struct value *function, is being evaluated is OK because the thread is stopped until the expression is completely evaluated. */ - if (struct_return || hidden_first_param_p + if (return_method != return_method_normal || (stack_temporaries && class_or_union_p (values_type))) { if (gdbarch_inner_than (gdbarch, 1, 2)) @@ -1046,7 +1038,7 @@ call_function_by_hand_dummy (struct value *function, } std::vector<struct value *> new_args; - if (hidden_first_param_p) + if (return_method == return_method_hidden_param) { /* Add the new argument to the front of the argument list. */ new_args.push_back @@ -1060,8 +1052,9 @@ call_function_by_hand_dummy (struct value *function, presumably, the ABI code knows where, in the call dummy, the return address should be pointed. */ sp = gdbarch_push_dummy_call (gdbarch, function, get_current_regcache (), - bp_addr, nargs, args, - sp, struct_return, struct_addr); + bp_addr, nargs, args, sp, + (return_method == return_method_struct), + struct_addr); /* Set up a frame ID for the dummy frame so we can pass it to set_momentary_breakpoint. We need to give the breakpoint a frame @@ -1157,7 +1150,7 @@ call_function_by_hand_dummy (struct value *function, sm = new_call_thread_fsm (current_ui, command_interp (), gdbarch, function, values_type, - struct_return || hidden_first_param_p, + return_method != return_method_normal, struct_addr); e = run_inferior_call (sm, call_thread.get (), real_pc); |