/* Perform an inferior function call, for GDB, the GNU debugger.
- Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
- 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
- Free Software Foundation, Inc.
+ Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
+ 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
+ 2008 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "breakpoint.h"
#include "command.h"
#include "gdb_string.h"
#include "infcall.h"
+#include "dummy-frame.h"
+#include "ada-lang.h"
/* NOTE: cagney/2003-04-16: What's the future of this code?
with "set coerce-float-to-double 0". */
static int coerce_float_to_double_p = 1;
+static void
+show_coerce_float_to_double_p (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
+{
+ fprintf_filtered (file, _("\
+Coercion of floats to doubles when calling functions is %s.\n"),
+ value);
+}
/* This boolean tells what gdb should do if a signal is received while
in a function called from gdb (call dummy). If set, gdb unwinds
The default is to stop in the frame where the signal was received. */
int unwind_on_signal_p = 0;
+static void
+show_unwind_on_signal_p (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
+{
+ fprintf_filtered (file, _("\
+Unwinding of stack if a signal is received while in a call dummy is %s.\n"),
+ value);
+}
+
/* Perform the standard coercions that are specified
- for arguments to be passed to C functions.
+ for arguments to be passed to C or Ada functions.
If PARAM_TYPE is non-NULL, it is the expected parameter type.
- IS_PROTOTYPED is non-zero if the function declaration is prototyped. */
+ IS_PROTOTYPED is non-zero if the function declaration is prototyped.
+ SP is the stack pointer were additional data can be pushed (updating
+ its value as needed). */
static struct value *
value_arg_coerce (struct value *arg, struct type *param_type,
- int is_prototyped)
+ int is_prototyped, CORE_ADDR *sp)
{
- struct type *arg_type = check_typedef (VALUE_TYPE (arg));
+ struct type *arg_type = check_typedef (value_type (arg));
struct type *type
= param_type ? check_typedef (param_type) : arg_type;
+ /* Perform any Ada-specific coercion first. */
+ if (current_language->la_language == language_ada)
+ arg = ada_convert_actual (arg, type, sp);
+
+ /* Force the value to the target if we will need its address. At
+ this point, we could allocate arguments on the stack instead of
+ calling malloc if we knew that their addresses would not be
+ saved by the called function. */
+ arg = value_coerce_to_target (arg);
+
switch (TYPE_CODE (type))
{
case TYPE_CODE_REF:
- if (TYPE_CODE (arg_type) != TYPE_CODE_REF
- && TYPE_CODE (arg_type) != TYPE_CODE_PTR)
- {
- arg = value_addr (arg);
- VALUE_TYPE (arg) = param_type;
- return arg;
- }
- break;
+ {
+ struct value *new_value;
+
+ if (TYPE_CODE (arg_type) == TYPE_CODE_REF)
+ return value_cast_pointers (type, arg);
+
+ /* Cast the value to the reference's target type, and then
+ convert it back to a reference. This will issue an error
+ if the value was not previously in memory - in some cases
+ we should clearly be allowing this, but how? */
+ new_value = value_cast (TYPE_TARGET_TYPE (type), arg);
+ new_value = value_ref (new_value);
+ return new_value;
+ }
case TYPE_CODE_INT:
case TYPE_CODE_CHAR:
case TYPE_CODE_BOOL:
case TYPE_CODE_STRING:
case TYPE_CODE_BITSTRING:
case TYPE_CODE_ERROR:
- case TYPE_CODE_MEMBER:
+ case TYPE_CODE_MEMBERPTR:
+ case TYPE_CODE_METHODPTR:
case TYPE_CODE_METHOD:
case TYPE_CODE_COMPLEX:
default:
CORE_ADDR
find_function_addr (struct value *function, struct type **retval_type)
{
- struct type *ftype = check_typedef (VALUE_TYPE (function));
+ struct type *ftype = check_typedef (value_type (function));
enum type_code code = TYPE_CODE (ftype);
struct type *value_type;
CORE_ADDR funaddr;
if (TYPE_LENGTH (ftype) == 1)
funaddr = value_as_address (value_addr (function));
else
- /* Handle integer used as address of a function. */
- funaddr = (CORE_ADDR) value_as_long (function);
+ {
+ /* Handle function descriptors lacking debug info. */
+ int found_descriptor = 0;
+ if (VALUE_LVAL (function) == lval_memory)
+ {
+ CORE_ADDR nfunaddr;
+ funaddr = value_as_address (value_addr (function));
+ nfunaddr = funaddr;
+ funaddr = gdbarch_convert_from_func_ptr_addr (current_gdbarch,
+ funaddr,
+ ¤t_target);
+ if (funaddr != nfunaddr)
+ found_descriptor = 1;
+ }
+ if (!found_descriptor)
+ /* Handle integer used as address of a function. */
+ funaddr = (CORE_ADDR) value_as_long (function);
+ }
value_type = builtin_type_int;
}
else
- error ("Invalid data type for function to be called.");
+ error (_("Invalid data type for function to be called."));
if (retval_type != NULL)
*retval_type = value_type;
- return funaddr + DEPRECATED_FUNCTION_START_OFFSET;
+ return funaddr + gdbarch_deprecated_function_start_offset (current_gdbarch);
}
/* Call breakpoint_auto_delete on the current contents of the bpstat
static CORE_ADDR
generic_push_dummy_code (struct gdbarch *gdbarch,
- CORE_ADDR sp, CORE_ADDR funaddr, int using_gcc,
+ CORE_ADDR sp, CORE_ADDR funaddr,
struct value **args, int nargs,
struct type *value_type,
- CORE_ADDR *real_pc, CORE_ADDR *bp_addr)
+ CORE_ADDR *real_pc, CORE_ADDR *bp_addr,
+ struct regcache *regcache)
{
/* Something here to findout the size of a breakpoint and then
allocate space for it on the stack. */
static CORE_ADDR
push_dummy_code (struct gdbarch *gdbarch,
- CORE_ADDR sp, CORE_ADDR funaddr, int using_gcc,
+ CORE_ADDR sp, CORE_ADDR funaddr,
struct value **args, int nargs,
struct type *value_type,
- CORE_ADDR *real_pc, CORE_ADDR *bp_addr)
+ CORE_ADDR *real_pc, CORE_ADDR *bp_addr,
+ struct regcache *regcache)
{
if (gdbarch_push_dummy_code_p (gdbarch))
- return gdbarch_push_dummy_code (gdbarch, sp, funaddr, using_gcc,
- args, nargs, value_type, real_pc, bp_addr);
+ return gdbarch_push_dummy_code (gdbarch, sp, funaddr,
+ args, nargs, value_type, real_pc, bp_addr,
+ regcache);
else
- return generic_push_dummy_code (gdbarch, sp, funaddr, using_gcc,
- args, nargs, value_type, real_pc, bp_addr);
+ return generic_push_dummy_code (gdbarch, sp, funaddr,
+ args, nargs, value_type, real_pc, bp_addr,
+ regcache);
}
/* All this stuff with a dummy frame may seem unnecessarily complicated
{
CORE_ADDR sp;
CORE_ADDR dummy_addr;
- struct type *value_type;
- unsigned char struct_return;
+ struct type *values_type, *target_values_type;
+ unsigned char struct_return = 0, lang_struct_return = 0;
CORE_ADDR struct_addr = 0;
struct regcache *retbuf;
struct cleanup *retbuf_cleanup;
struct inferior_status *inf_status;
struct cleanup *inf_status_cleanup;
CORE_ADDR funaddr;
- int using_gcc; /* Set to version of gcc in use, or zero if not gcc */
CORE_ADDR real_pc;
- struct type *ftype = check_typedef (SYMBOL_TYPE (function));
+ struct type *ftype = check_typedef (value_type (function));
CORE_ADDR bp_addr;
+ struct regcache *caller_regcache;
+ struct cleanup *caller_regcache_cleanup;
+ struct frame_id dummy_id;
+ struct cleanup *args_cleanup;
+ struct frame_info *frame;
+ struct gdbarch *gdbarch;
+
+ if (TYPE_CODE (ftype) == TYPE_CODE_PTR)
+ ftype = check_typedef (TYPE_TARGET_TYPE (ftype));
if (!target_has_execution)
noprocess ();
+ frame = get_current_frame ();
+ gdbarch = get_frame_arch (frame);
+
+ if (!gdbarch_push_dummy_call_p (gdbarch))
+ error (_("This target does not support function calls"));
+
/* Create a cleanup chain that contains the retbuf (buffer
containing the register values). This chain is create BEFORE the
inf_status chain so that the inferior status can cleaned up
(restored or discarded) without having the retbuf freed. */
- retbuf = regcache_xmalloc (current_gdbarch);
+ retbuf = regcache_xmalloc (gdbarch);
retbuf_cleanup = make_cleanup_regcache_xfree (retbuf);
/* A cleanup for the inferior status. Create this AFTER the retbuf
inf_status = save_inferior_status (1);
inf_status_cleanup = make_cleanup_restore_inferior_status (inf_status);
- /* FIXME: cagney/2003-02-26: Step zero of this little tinker is to
- extract the generic dummy frame code from the architecture
- vector. Hence this direct call.
-
- A follow-on change is to modify this interface so that it takes
- thread OR frame OR ptid as a parameter, and returns a dummy frame
- handle. The handle can then be used further down as a parameter
- to generic_save_dummy_frame_tos(). Hmm, thinking about it, since
- everything is ment to be using generic dummy frames, why not even
- use some of the dummy frame code to here - do a regcache dup and
- then pass the duped regcache, along with all the other stuff, at
- one single point.
-
- In fact, you can even save the structure's return address in the
- dummy frame and fix one of those nasty lost struct return edge
- conditions. */
- generic_push_dummy_frame ();
+ /* Save the caller's registers so that they can be restored once the
+ callee returns. To allow nested calls the registers are (further
+ down) pushed onto a dummy frame stack. Include a cleanup (which
+ is tossed once the regcache has been pushed). */
+ caller_regcache = frame_save_as_regcache (frame);
+ caller_regcache_cleanup = make_cleanup_regcache_xfree (caller_regcache);
/* Ensure that the initial SP is correctly aligned. */
{
- CORE_ADDR old_sp = read_sp ();
- if (gdbarch_frame_align_p (current_gdbarch))
+ CORE_ADDR old_sp = get_frame_sp (frame);
+ if (gdbarch_frame_align_p (gdbarch))
{
- sp = gdbarch_frame_align (current_gdbarch, old_sp);
+ sp = gdbarch_frame_align (gdbarch, old_sp);
/* NOTE: cagney/2003-08-13: Skip the "red zone". For some
ABIs, a function can use memory beyond the inner most stack
address. AMD64 called that region the "red zone". Skip at
least the "red zone" size before allocating any space on
the stack. */
- if (INNER_THAN (1, 2))
- sp -= gdbarch_frame_red_zone_size (current_gdbarch);
+ if (gdbarch_inner_than (gdbarch, 1, 2))
+ sp -= gdbarch_frame_red_zone_size (gdbarch);
else
- sp += gdbarch_frame_red_zone_size (current_gdbarch);
+ sp += gdbarch_frame_red_zone_size (gdbarch);
/* Still aligned? */
- gdb_assert (sp == gdbarch_frame_align (current_gdbarch, sp));
+ gdb_assert (sp == gdbarch_frame_align (gdbarch, sp));
/* NOTE: cagney/2002-09-18:
On a RISC architecture, a void parameterless generic dummy
to pay :-). */
if (sp == old_sp)
{
- if (INNER_THAN (1, 2))
+ if (gdbarch_inner_than (gdbarch, 1, 2))
/* Stack grows down. */
- sp = gdbarch_frame_align (current_gdbarch, old_sp - 1);
+ sp = gdbarch_frame_align (gdbarch, old_sp - 1);
else
/* Stack grows up. */
- sp = gdbarch_frame_align (current_gdbarch, old_sp + 1);
+ sp = gdbarch_frame_align (gdbarch, old_sp + 1);
}
- gdb_assert ((INNER_THAN (1, 2) && sp <= old_sp)
- || (INNER_THAN (2, 1) && sp >= old_sp));
+ gdb_assert ((gdbarch_inner_than (gdbarch, 1, 2)
+ && sp <= old_sp)
+ || (gdbarch_inner_than (gdbarch, 2, 1)
+ && sp >= old_sp));
}
else
/* FIXME: cagney/2002-09-18: Hey, you loose!
sp = old_sp;
}
- funaddr = find_function_addr (function, &value_type);
- CHECK_TYPEDEF (value_type);
-
- {
- struct block *b = block_for_pc (funaddr);
- /* If compiled without -g, assume GCC 2. */
- using_gcc = (b == NULL ? 2 : BLOCK_GCC_COMPILED (b));
- }
-
- /* Are we returning a value using a structure return or a normal
- value return? */
+ funaddr = find_function_addr (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. */
+
+ if (language_pass_by_reference (values_type))
+ {
+ lang_struct_return = 1;
- struct_return = using_struct_return (value_type, using_gcc);
+ /* Tell the target specific argument pushing routine not to
+ expect a value. */
+ target_values_type = builtin_type_void;
+ }
+ else
+ {
+ struct_return = using_struct_return (value_type (function), values_type);
+ target_values_type = values_type;
+ }
/* Determine the location of the breakpoint (and possibly other
stuff) that the called function will return to. The SPARC, for a
/* The actual breakpoint (at BP_ADDR) is inserted separatly so there
is no need to write that out. */
- switch (CALL_DUMMY_LOCATION)
+ switch (gdbarch_call_dummy_location (gdbarch))
{
case ON_STACK:
/* "dummy_addr" is here just to keep old targets happy. New
targets return that same information via "sp" and "bp_addr". */
- if (INNER_THAN (1, 2))
+ if (gdbarch_inner_than (gdbarch, 1, 2))
{
- sp = push_dummy_code (current_gdbarch, sp, funaddr,
- using_gcc, args, nargs, value_type,
- &real_pc, &bp_addr);
+ sp = push_dummy_code (gdbarch, sp, funaddr,
+ args, nargs, target_values_type,
+ &real_pc, &bp_addr, get_current_regcache ());
dummy_addr = sp;
}
else
{
dummy_addr = sp;
- sp = push_dummy_code (current_gdbarch, sp, funaddr,
- using_gcc, args, nargs, value_type,
- &real_pc, &bp_addr);
+ sp = push_dummy_code (gdbarch, sp, funaddr,
+ args, nargs, target_values_type,
+ &real_pc, &bp_addr, get_current_regcache ());
}
break;
case AT_ENTRY_POINT:
dummy_addr = entry_point_address ();
/* Make certain that the address points at real code, and not a
function descriptor. */
- dummy_addr = gdbarch_convert_from_func_ptr_addr (current_gdbarch,
+ dummy_addr = gdbarch_convert_from_func_ptr_addr (gdbarch,
dummy_addr,
¤t_target);
/* A call dummy always consists of just a single breakpoint, so
dummy_addr = entry_point_address ();
/* Make certain that the address points at real code, and not
a function descriptor. */
- dummy_addr = gdbarch_convert_from_func_ptr_addr (current_gdbarch,
+ dummy_addr = gdbarch_convert_from_func_ptr_addr (gdbarch,
dummy_addr,
¤t_target);
/* A call dummy always consists of just a single breakpoint,
break;
}
default:
- internal_error (__FILE__, __LINE__, "bad switch");
+ internal_error (__FILE__, __LINE__, _("bad switch"));
}
- /* Save where the breakpoint is going to be inserted so that the
- dummy-frame code is later able to re-identify it. */
- generic_save_call_dummy_addr (bp_addr, bp_addr + 1);
-
if (nargs < TYPE_NFIELDS (ftype))
- error ("too few arguments in function call");
+ error (_("too few arguments in function call"));
{
int i;
param_type = TYPE_FIELD_TYPE (ftype, i);
else
param_type = NULL;
-
- args[i] = value_arg_coerce (args[i], param_type, prototyped);
-
- /* elz: this code is to handle the case in which the function
- to be called has a pointer to function as parameter and the
- corresponding actual argument is the address of a function
- and not a pointer to function variable. In aCC compiled
- code, the calls through pointers to functions (in the body
- of the function called by hand) are made via
- $$dyncall_external which requires some registers setting,
- this is taken care of if we call via a function pointer
- variable, but not via a function address. In cc this is
- not a problem. */
-
- if (using_gcc == 0)
- {
- if (param_type != NULL && TYPE_CODE (ftype) != TYPE_CODE_METHOD)
- {
- /* if this parameter is a pointer to function. */
- if (TYPE_CODE (param_type) == TYPE_CODE_PTR)
- if (TYPE_CODE (TYPE_TARGET_TYPE (param_type)) == TYPE_CODE_FUNC)
- /* elz: FIXME here should go the test about the
- compiler used to compile the target. We want to
- issue the error message only if the compiler
- used was HP's aCC. If we used HP's cc, then
- there is no problem and no need to return at
- this point. */
- /* Go see if the actual parameter is a variable of
- type pointer to function or just a function. */
- if (args[i]->lval == not_lval)
- {
- char *arg_name;
- if (find_pc_partial_function ((CORE_ADDR) args[i]->aligner.contents[0], &arg_name, NULL, NULL))
- error ("\
-You cannot use function <%s> as argument. \n\
-You must use a pointer to function type variable. Command ignored.", arg_name);
- }
- }
- }
- }
- }
- if (DEPRECATED_REG_STRUCT_HAS_ADDR_P ())
- {
- int i;
- /* This is a machine like the sparc, where we may need to pass a
- pointer to the structure, not the structure itself. */
- for (i = nargs - 1; i >= 0; i--)
- {
- struct type *arg_type = check_typedef (VALUE_TYPE (args[i]));
- if ((TYPE_CODE (arg_type) == TYPE_CODE_STRUCT
- || TYPE_CODE (arg_type) == TYPE_CODE_UNION
- || TYPE_CODE (arg_type) == TYPE_CODE_ARRAY
- || TYPE_CODE (arg_type) == TYPE_CODE_STRING
- || TYPE_CODE (arg_type) == TYPE_CODE_BITSTRING
- || TYPE_CODE (arg_type) == TYPE_CODE_SET
- || (TYPE_CODE (arg_type) == TYPE_CODE_FLT
- && TYPE_LENGTH (arg_type) > 8)
- )
- && DEPRECATED_REG_STRUCT_HAS_ADDR (using_gcc, arg_type))
- {
- CORE_ADDR addr;
- int len; /* = TYPE_LENGTH (arg_type); */
- int aligned_len;
- arg_type = check_typedef (VALUE_ENCLOSING_TYPE (args[i]));
- len = TYPE_LENGTH (arg_type);
-
- if (DEPRECATED_STACK_ALIGN_P ())
- /* MVS 11/22/96: I think at least some of this
- stack_align code is really broken. Better to let
- PUSH_ARGUMENTS adjust the stack in a target-defined
- manner. */
- aligned_len = DEPRECATED_STACK_ALIGN (len);
- else
- aligned_len = len;
- if (INNER_THAN (1, 2))
- {
- /* stack grows downward */
- sp -= aligned_len;
- /* ... so the address of the thing we push is the
- stack pointer after we push it. */
- addr = sp;
- }
- else
- {
- /* The stack grows up, so the address of the thing
- we push is the stack pointer before we push it. */
- addr = sp;
- sp += aligned_len;
- }
- /* Push the structure. */
- write_memory (addr, VALUE_CONTENTS_ALL (args[i]), len);
- /* The value we're going to pass is the address of the
- thing we just pushed. */
- /*args[i] = value_from_longest (lookup_pointer_type (value_type),
- (LONGEST) addr); */
- args[i] = value_from_pointer (lookup_pointer_type (arg_type),
- addr);
- }
- }
- }
+ args[i] = value_arg_coerce (args[i], param_type, prototyped, &sp);
+ if (param_type != NULL && language_pass_by_reference (param_type))
+ args[i] = value_addr (args[i]);
+ }
+ }
/* Reserve space for the return structure to be written on the
stack, if necessary. Make certain that the value is correctly
aligned. */
- if (struct_return)
+ if (struct_return || lang_struct_return)
{
- int len = TYPE_LENGTH (value_type);
- if (DEPRECATED_STACK_ALIGN_P ())
- /* NOTE: cagney/2003-03-22: Should rely on frame align, rather
- than stack align to force the alignment of the stack. */
- len = DEPRECATED_STACK_ALIGN (len);
- if (INNER_THAN (1, 2))
+ int len = TYPE_LENGTH (values_type);
+ if (gdbarch_inner_than (gdbarch, 1, 2))
{
/* Stack grows downward. Align STRUCT_ADDR and SP after
making space for the return value. */
sp -= len;
- if (gdbarch_frame_align_p (current_gdbarch))
- sp = gdbarch_frame_align (current_gdbarch, sp);
+ if (gdbarch_frame_align_p (gdbarch))
+ sp = gdbarch_frame_align (gdbarch, sp);
struct_addr = sp;
}
else
{
/* Stack grows upward. Align the frame, allocate space, and
then again, re-align the frame??? */
- if (gdbarch_frame_align_p (current_gdbarch))
- sp = gdbarch_frame_align (current_gdbarch, sp);
+ if (gdbarch_frame_align_p (gdbarch))
+ sp = gdbarch_frame_align (gdbarch, sp);
struct_addr = sp;
sp += len;
- if (gdbarch_frame_align_p (current_gdbarch))
- sp = gdbarch_frame_align (current_gdbarch, sp);
+ if (gdbarch_frame_align_p (gdbarch))
+ sp = gdbarch_frame_align (gdbarch, sp);
}
}
+ if (lang_struct_return)
+ {
+ struct value **new_args;
+
+ /* Add the new argument to the front of the argument list. */
+ new_args = xmalloc (sizeof (struct value *) * (nargs + 1));
+ new_args[0] = value_from_pointer (lookup_pointer_type (values_type),
+ struct_addr);
+ memcpy (&new_args[1], &args[0], sizeof (struct value *) * nargs);
+ args = new_args;
+ nargs++;
+ args_cleanup = make_cleanup (xfree, args);
+ }
+ else
+ args_cleanup = make_cleanup (null_cleanup, NULL);
+
/* Create the dummy stack frame. Pass in the call dummy address as,
presumably, the ABI code knows where, in the call dummy, the
return address should be pointed. */
- if (gdbarch_push_dummy_call_p (current_gdbarch))
- /* When there is no push_dummy_call method, should this code
- simply error out. That would the implementation of this method
- for all ABIs (which is probably a good thing). */
- sp = gdbarch_push_dummy_call (current_gdbarch, function, current_regcache,
- bp_addr, nargs, args, sp, struct_return,
- struct_addr);
- else if (DEPRECATED_PUSH_ARGUMENTS_P ())
- /* Keep old targets working. */
- sp = DEPRECATED_PUSH_ARGUMENTS (nargs, args, sp, struct_return,
- struct_addr);
- else
- error ("This target does not support function calls");
-
- if (DEPRECATED_PUSH_RETURN_ADDRESS_P ())
- /* for targets that use no CALL_DUMMY */
- /* There are a number of targets now which actually don't write
- any CALL_DUMMY instructions into the target, but instead just
- save the machine state, push the arguments, and jump directly
- to the callee function. Since this doesn't actually involve
- executing a JSR/BSR instruction, the return address must be set
- up by hand, either by pushing onto the stack or copying into a
- return-address register as appropriate. Formerly this has been
- done in PUSH_ARGUMENTS, but that's overloading its
- functionality a bit, so I'm making it explicit to do it here. */
- /* NOTE: cagney/2003-04-22: The first parameter ("real_pc") has
- been replaced with zero, it turns out that no implementation
- used that parameter. This occured because the value being
- supplied - the address of the called function's entry point
- instead of the address of the breakpoint that the called
- function should return to - wasn't useful. */
- sp = DEPRECATED_PUSH_RETURN_ADDRESS (0, sp);
-
- /* NOTE: cagney/2003-03-23: Diable this code when there is a
- push_dummy_call() method. Since that method will have already
- handled any alignment issues, the code below is entirely
- redundant. */
- if (!gdbarch_push_dummy_call_p (current_gdbarch)
- && DEPRECATED_STACK_ALIGN_P () && !INNER_THAN (1, 2))
- {
- /* If stack grows up, we must leave a hole at the bottom, note
- that sp already has been advanced for the arguments! */
- sp = DEPRECATED_STACK_ALIGN (sp);
- }
+ sp = gdbarch_push_dummy_call (gdbarch, function, get_current_regcache (),
+ bp_addr, nargs, args,
+ sp, struct_return, struct_addr);
- /* Store the address at which the structure is supposed to be
- written. */
- /* NOTE: 2003-03-24: Since PUSH_ARGUMENTS can (and typically does)
- store the struct return address, this call is entirely redundant. */
- if (struct_return && DEPRECATED_STORE_STRUCT_RETURN_P ())
- DEPRECATED_STORE_STRUCT_RETURN (struct_addr, sp);
-
- /* Write the stack pointer. This is here because the statements
- above might fool with it. On SPARC, this write also stores the
- register window into the right place in the new stack frame,
- which otherwise wouldn't happen (see store_inferior_registers in
- sparc-nat.c). */
- /* NOTE: cagney/2003-03-23: Since the architecture method
- push_dummy_call() should have already stored the stack pointer
- (as part of creating the fake call frame), and none of the code
- following that call adjusts the stack-pointer value, the below
- call is entirely redundant. */
- if (DEPRECATED_DUMMY_WRITE_SP_P ())
- DEPRECATED_DUMMY_WRITE_SP (sp);
-
- if (DEPRECATED_SAVE_DUMMY_FRAME_TOS_P ())
- DEPRECATED_SAVE_DUMMY_FRAME_TOS (sp);
- else
- /* Sanity. The exact same SP value is returned by
- PUSH_DUMMY_CALL, saved as the dummy-frame TOS, and used by
- unwind_dummy_id to form the frame ID's stack address. */
- generic_save_dummy_frame_tos (sp);
+ do_cleanups (args_cleanup);
+
+ /* 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
+ ID so that the breakpoint code can correctly re-identify the
+ dummy breakpoint. */
+ /* Sanity. The exact same SP value is returned by PUSH_DUMMY_CALL,
+ saved as the dummy-frame TOS, and used by unwind_dummy_id to form
+ the frame ID's stack address. */
+ dummy_id = frame_id_build (sp, bp_addr);
- /* Now proceed, having reached the desired place. */
- clear_proceed_status ();
-
/* Create a momentary breakpoint at the return address of the
inferior. That way it breaks when it returns. */
{
struct breakpoint *bpt;
struct symtab_and_line sal;
- struct frame_id frame;
init_sal (&sal); /* initialize to zeroes */
sal.pc = bp_addr;
sal.section = find_pc_overlay (sal.pc);
- /* 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 ID so that the breakpoint code can correctly re-identify
- the dummy breakpoint. */
- if (gdbarch_unwind_dummy_id_p (current_gdbarch))
- {
- /* Sanity. The exact same SP value is returned by
- PUSH_DUMMY_CALL, saved as the dummy-frame TOS, and used by
- unwind_dummy_id to form the frame ID's stack address. */
- frame = frame_id_build (sp, sal.pc);
- }
- else
- {
- /* The assumption here is that push_dummy_call() returned the
- stack part of the frame ID. Unfortunately, many older
- architectures were, via a convoluted mess, relying on the
- poorly defined and greatly overloaded
- DEPRECATED_TARGET_READ_FP or DEPRECATED_FP_REGNUM to supply
- the value. */
- if (DEPRECATED_TARGET_READ_FP_P ())
- frame = frame_id_build (DEPRECATED_TARGET_READ_FP (), sal.pc);
- else if (DEPRECATED_FP_REGNUM >= 0)
- frame = frame_id_build (read_register (DEPRECATED_FP_REGNUM), sal.pc);
- else
- frame = frame_id_build (sp, sal.pc);
- }
- bpt = set_momentary_breakpoint (sal, frame, bp_call_dummy);
+ /* Sanity. The exact same SP value is returned by
+ PUSH_DUMMY_CALL, saved as the dummy-frame TOS, and used by
+ unwind_dummy_id to form the frame ID's stack address. */
+ bpt = set_momentary_breakpoint (sal, dummy_id, bp_call_dummy);
bpt->disposition = disp_del;
}
+ /* Everything's ready, push all the info needed to restore the
+ caller (and identify the dummy-frame) onto the dummy-frame
+ stack. */
+ dummy_frame_push (caller_regcache, &dummy_id);
+ discard_cleanups (caller_regcache_cleanup);
+
+ /* - SNIP - SNIP - SNIP - SNIP - SNIP - SNIP - SNIP - SNIP - SNIP -
+ If you're looking to implement asynchronous dummy-frames, then
+ just below is the place to chop this function in two.. */
+
+ /* Now proceed, having reached the desired place. */
+ clear_proceed_status ();
+
/* Execute a "stack dummy", a piece of code stored in the stack by
the debugger to be executed in the inferior.
{
/* Can't use a cleanup here. It is discarded, instead use
an alloca. */
- char *tmp = xstrprintf ("at %s", local_hex_string (funaddr));
+ char *tmp = xstrprintf ("at %s", hex_string (funaddr));
char *a = alloca (strlen (tmp) + 1);
strcpy (a, tmp);
xfree (tmp);
/* FIXME: Insert a bunch of wrap_here; name can be very
long if it's a C++ name with arguments and stuff. */
- error ("\
+ error (_("\
The program being debugged was signaled while in a function called from GDB.\n\
GDB has restored the context to what it was before the call.\n\
To change this behavior use \"set unwindonsignal off\"\n\
-Evaluation of the expression containing the function (%s) will be abandoned.",
+Evaluation of the expression containing the function (%s) will be abandoned."),
name);
}
else
discard_inferior_status (inf_status);
/* FIXME: Insert a bunch of wrap_here; name can be very
long if it's a C++ name with arguments and stuff. */
- error ("\
+ error (_("\
The program being debugged was signaled while in a function called from GDB.\n\
GDB remains in the frame where the signal was received.\n\
To change this behavior use \"set unwindonsignal on\"\n\
-Evaluation of the expression containing the function (%s) will be abandoned.",
+Evaluation of the expression containing the function (%s) will be abandoned."),
name);
}
}
someday this will be implemented (it would not be easy). */
/* FIXME: Insert a bunch of wrap_here; name can be very long if it's
a C++ name with arguments and stuff. */
- error ("\
+ error (_("\
The program being debugged stopped while in a function called from GDB.\n\
When the function (%s) is done executing, GDB will silently\n\
stop (instead of continuing to evaluate the expression containing\n\
-the function call).", name);
+the function call)."), name);
}
/* The above code errors out, so ... */
- internal_error (__FILE__, __LINE__, "... should not be here");
+ internal_error (__FILE__, __LINE__, _("... should not be here"));
}
/* If we get here the called FUNCTION run to completion. */
leave the RETBUF alone. */
do_cleanups (inf_status_cleanup);
- /* Figure out the value returned by the function, return that. */
+ /* Figure out the value returned by the function. */
{
- struct value *retval;
- if (TYPE_CODE (value_type) == TYPE_CODE_VOID)
- /* If the function returns void, don't bother fetching the
- return value. */
- retval = allocate_value (value_type);
- else if (struct_return)
- /* NOTE: cagney/2003-09-27: This assumes that PUSH_DUMMY_CALL
- has correctly stored STRUCT_ADDR in the target. In the past
- that hasn't been the case, the old MIPS PUSH_ARGUMENTS
- (PUSH_DUMMY_CALL precursor) would silently move the location
- of the struct return value making STRUCT_ADDR bogus. If
- you're seeing problems with values being returned using the
- "struct return convention", check that PUSH_DUMMY_CALL isn't
- playing tricks. */
- retval = value_at (value_type, struct_addr, NULL);
+ struct value *retval = NULL;
+
+ if (lang_struct_return)
+ retval = value_at (values_type, struct_addr);
+ else if (TYPE_CODE (target_values_type) == TYPE_CODE_VOID)
+ {
+ /* If the function returns void, don't bother fetching the
+ return value. */
+ retval = allocate_value (values_type);
+ }
else
{
- /* This code only handles "register convention". */
- retval = allocate_value (value_type);
- gdb_assert (gdbarch_return_value (current_gdbarch, value_type,
- NULL, NULL, NULL)
- == RETURN_VALUE_REGISTER_CONVENTION);
- gdbarch_return_value (current_gdbarch, value_type, retbuf,
- VALUE_CONTENTS_RAW (retval) /*read*/,
- NULL /*write*/);
+ switch (gdbarch_return_value (gdbarch, value_type (function),
+ target_values_type, NULL, NULL, NULL))
+ {
+ case RETURN_VALUE_REGISTER_CONVENTION:
+ case RETURN_VALUE_ABI_RETURNS_ADDRESS:
+ case RETURN_VALUE_ABI_PRESERVES_ADDRESS:
+ retval = allocate_value (values_type);
+ gdbarch_return_value (gdbarch, value_type (function), values_type,
+ retbuf, value_contents_raw (retval), NULL);
+ break;
+ case RETURN_VALUE_STRUCT_CONVENTION:
+ retval = value_at (values_type, struct_addr);
+ break;
+ }
}
+
do_cleanups (retbuf_cleanup);
+
+ gdb_assert(retval);
return retval;
}
}
+\f
+/* Provide a prototype to silence -Wmissing-prototypes. */
void _initialize_infcall (void);
void
_initialize_infcall (void)
{
add_setshow_boolean_cmd ("coerce-float-to-double", class_obscure,
- &coerce_float_to_double_p, "\
-Set coercion of floats to doubles when calling functions.", "\
-Show coercion of floats to doubles when calling functions", "\
+ &coerce_float_to_double_p, _("\
+Set coercion of floats to doubles when calling functions."), _("\
+Show coercion of floats to doubles when calling functions"), _("\
Variables of type float should generally be converted to doubles before\n\
calling an unprototyped function, and left alone when calling a prototyped\n\
function. However, some older debug info formats do not provide enough\n\
information to determine that a function is prototyped. If this flag is\n\
set, GDB will perform the conversion for a function it considers\n\
unprototyped.\n\
-The default is to perform the conversion.\n", "\
-Coercion of floats to doubles when calling functions is %s.",
- NULL, NULL, &setlist, &showlist);
+The default is to perform the conversion.\n"),
+ NULL,
+ show_coerce_float_to_double_p,
+ &setlist, &showlist);
add_setshow_boolean_cmd ("unwindonsignal", no_class,
- &unwind_on_signal_p, "\
-Set unwinding of stack if a signal is received while in a call dummy.", "\
-Show unwinding of stack if a signal is received while in a call dummy.", "\
+ &unwind_on_signal_p, _("\
+Set unwinding of stack if a signal is received while in a call dummy."), _("\
+Show unwinding of stack if a signal is received while in a call dummy."), _("\
The unwindonsignal lets the user determine what gdb should do if a signal\n\
is received while in a function called from gdb (call dummy). If set, gdb\n\
unwinds the stack and restore the context to what as it was before the call.\n\
-The default is to stop in the frame where the signal was received.", "\
-Unwinding of stack if a signal is received while in a call dummy is %s.",
- NULL, NULL, &setlist, &showlist);
+The default is to stop in the frame where the signal was received."),
+ NULL,
+ show_unwind_on_signal_p,
+ &setlist, &showlist);
}
projects / deliverable / binutils-gdb.git / blobdiff