* This code is derived from software copyrighted by the Free Software
* Modified 1991 by Donn Seeley at UUNET Technologies, Inc.
* Modified 1990 by Van Jacobson at Lawrence Berkeley Laboratory.
static char sccsid
[] = "@(#)printcmd.c 6.5 (Berkeley) 5/8/91";
/* Print values for GNU debugger GDB.
Copyright (C) 1986, 1987, 1988, 1989 Free Software Foundation, Inc.
This file is part of GDB.
GDB 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 1, or (at your option)
GDB is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GDB; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Last specified output format. */
static char last_format
= 'x';
/* Last specified examination size. 'b', 'h', 'w' or `q'. */
static char last_size
= 'w';
/* Default address to examine next. */
static CORE_ADDR next_address
;
/* Last address examined. */
static CORE_ADDR last_examine_address
;
/* Contents of last address examined.
This is not valid past the end of the `x' command! */
static value last_examine_value
;
/* Number of auto-display expression currently being displayed.
So that we can deleted it if we get an error or a signal within it.
-1 when not doing one. */
int current_display_number
;
static void do_one_display ();
void print_scalar_formatted ();
void print_formatted_address ();
/* Decode a format specification. *STRING_PTR should point to it.
OFORMAT and OSIZE are used as defaults for the format and size
if none are given in the format specification.
If OSIZE is zero, then the size field of the returned value
should be set only if a size is explicitly specified by the
The structure returned describes all the data
found in the specification. In addition, *STRING_PTR is advanced
past the specification and past all whitespace following it. */
decode_format (string_ptr
, oformat
, osize
)
register char *p
= *string_ptr
;
if (*p
>= '0' && *p
<= '9')
while (*p
>= '0' && *p
<= '9') p
++;
/* Now process size or format letters that follow. */
if (*p
== 'b' || *p
== 'h' || *p
== 'w' || *p
== 'g')
else if ((*p
>= 'a' && *p
<= 'z') || (*p
>= 'A' && *p
<= 'Z'))
/* Make sure 'g' size is not used on integer types.
Well, actually, we can handle hex. */
if (val
.size
== 'g' && val
.format
!= 'f' && val
.format
!= 'x')
while (*p
== ' ' || *p
== '\t') p
++;
/* Set defaults for format and size if not specified. */
/* Neither has been specified. */
/* If a size is specified, any format makes a reasonable
val
.format
= oformat
== 'i' ? 'x' : oformat
;
else if (val
.size
== '?')
/* Addresses must be words. */
val
.size
= osize
? 'w' : osize
;
/* Floating point has to be word or giantword. */
if (osize
== 'w' || osize
== 'g')
/* Default it to giantword if the last used size is not
val
.size
= osize
? 'g' : osize
;
/* Characters default to one byte. */
val
.size
= osize
? 'b' : osize
;
/* The default is the size most recently specified. */
/* Print value VAL on stdout according to FORMAT, a letter or 0.
Do not end with a newline.
0 means print VAL according to its own type.
SIZE is the letter for the size of datum being printed.
This is used to pad hex numbers so they line up. */
print_formatted (val
, format
, size
)
int len
= TYPE_LENGTH (VALUE_TYPE (val
));
if (VALUE_LVAL (val
) == lval_memory
)
next_address
= VALUE_ADDRESS (val
) + len
;
next_address
= VALUE_ADDRESS (val
)
+ value_print (value_addr (val
), stdout
, 0, Val_pretty_default
);
next_address
= VALUE_ADDRESS (val
)
+ print_insn (VALUE_ADDRESS (val
), stdout
);
|| TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_ARRAY
|| TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_STRUCT
|| TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_UNION
value_print (val
, stdout
, format
, Val_pretty_default
);
print_scalar_formatted (VALUE_CONTENTS (val
), VALUE_TYPE (val
),
/* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
according to letters FORMAT and SIZE on STREAM.
FORMAT may not be zero. Formats s and i are not supported at this level.
This is how the elements of an array or structure are printed
print_scalar_formatted (valaddr
, type
, format
, size
, stream
)
int len
= TYPE_LENGTH (type
);
if (size
== 'g' && sizeof (LONGEST
) < 8
/* ok, we're going to have to get fancy here. Assumption: a
unsigned long v1
, v2
, tmp
;
v1
= unpack_long (builtin_type_long
, valaddr
);
v2
= unpack_long (builtin_type_long
, valaddr
+ 4);
/* Little endian -- swap the two for printing */
fprintf_filtered (stream
, "0x%08x%08x", v1
, v2
);
error ("Output size \"g\" unimplemented for format \"%c\".",
val_long
= unpack_long (type
, valaddr
);
/* If value is unsigned, truncate it in case negative. */
if (len
== sizeof (char))
val_long
&= (1 << 8 * sizeof(char)) - 1;
else if (len
== sizeof (short))
val_long
&= (1 << 8 * sizeof(short)) - 1;
else if (len
== sizeof (long))
val_long
&= (unsigned long) - 1;
size
= (len
< sizeof (long long) ? 'w' : 'g');
fprintf_filtered (stream
, "0x%02llx", val_long
);
fprintf_filtered (stream
, "0x%04llx", val_long
);
case 0: /* no size specified, like in print */
fprintf_filtered (stream
, "0x%08llx", val_long
);
fprintf_filtered (stream
, "0x%016llx", val_long
);
error ("Undefined output size \"%c\".", size
);
fprintf_filtered (stream
, "0x%02x", val_long
);
fprintf_filtered (stream
, "0x%04x", val_long
);
case 0: /* no size specified, like in print */
fprintf_filtered (stream
, "0x%08x", val_long
);
fprintf_filtered (stream
, "0x%o16x", val_long
);
error ("Undefined output size \"%c\".", size
);
#endif /* not LONG_LONG */
fprintf_filtered (stream
, "%lld", val_long
);
fprintf_filtered (stream
, "%d", val_long
);
fprintf_filtered (stream
, "%llu", val_long
);
fprintf_filtered (stream
, "%u", val_long
);
fprintf_filtered (stream
, "0%llo", val_long
);
fprintf_filtered (stream
, "0%o", val_long
);
fprintf_filtered (stream
, "0");
print_address ((CORE_ADDR
) val_long
, stream
);
print_formatted_address ((CORE_ADDR
) val_long
, stream
);
value_print (value_from_long (builtin_type_char
, val_long
), stream
, 0,
if (len
== sizeof (float))
type
= builtin_type_float
;
else if (len
== sizeof (double))
type
= builtin_type_double
;
print_floating(valaddr
, type
, stream
);
error ("Undefined output format \"%c\".", format
);
/* Print a floating point value of type TYPE, pointed to in GDB by VALADDR,
print_floating(valaddr
, type
, stream
)
int len
= TYPE_LENGTH (type
);
doub
= unpack_double (type
, valaddr
, &inv
);
fprintf_filtered (stream
, "Invalid float value");
/* Surely it is an IEEE floating point NaN. */
long low
, high
, *arg
= (long *)valaddr
; /* ASSUMED 32 BITS */
if (len
<= sizeof(float))
/* It's single precision. */
/* It's double precision.
Get the high and low words of the fraction.
Distinguish big and little-endian machines. */
low
= arg
[1], high
= arg
[0];
low
= arg
[0], high
= arg
[1];
fprintf_filtered (stream
, "-NaN(0x%lx%.8lx)" + nonneg
, high
, low
);
fprintf_filtered (stream
, "-NaN(0x%lx)" + nonneg
, low
);
fprintf_filtered (stream
, len
<= sizeof(float) ? "%.6g" : "%.17g", doub
);
/* Specify default address for `x' command.
`info lines' uses this. */
/* Make address available to the user as $_. */
set_internalvar (lookup_internalvar ("_"),
value_from_long (builtin_type_int
, (LONGEST
) addr
));
/* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM. */
print_address_symbolic (addr
, stream
)
register int i
= find_pc_misc_function (addr
);
/* If nothing comes out, don't print anything symbolic. */
name_location
= misc_function_vector
[i
].address
;
if (addr
- name_location
)
fprintf_filtered (stream
, format
,
misc_function_vector
[i
].name
, addr
- name_location
);
/* Print address ADDR symbolically on STREAM.
First print it as a number. Then perhaps print
<SYMBOL + OFFSET> after the number. */
print_address (addr
, stream
)
fprintf_filtered (stream
, "0x%x", addr
);
print_address_symbolic (addr
, stream
);
/* Like print_address but opnly prints symbolically. */
print_formatted_address (addr
, stream
)
register struct symbol
*fs
;
i
= find_pc_partial_function (addr
, &name
, &name_location
);
/* If nothing comes out, don't print anything symbolic. */
fprintf_filtered (stream
, "0x%x", addr
);
else if (addr
- name_location
)
fprintf_filtered (stream
, "%s+%d", name
, addr
- name_location
);
fprintf_filtered (stream
, "%s", name
);
/* Examine data at address ADDR in format FMT.
Fetch it from memory and print on stdout. */
register char format
= 0;
/* String or instruction format implies fetch single bytes
regardless of the specified size. */
if (format
== 's' || format
== 'i')
val_type
= builtin_type_char
;
val_type
= builtin_type_short
;
val_type
= builtin_type_long
;
val_type
= builtin_type_double
;
val_type
= builtin_type_long_long
;
if (format
== 's' || format
== 'i')
/* Print as many objects as specified in COUNT, at most maxelts per line,
with the address of the next one at the start of each line. */
print_address (next_address
, stdout
);
/* Note that print_formatted sets next_address for the next
last_examine_address
= next_address
;
last_examine_value
= value_at (val_type
, next_address
);
print_formatted (last_examine_value
, format
, size
);
validate_format (fmt
, cmdname
)
error ("Size letters are meaningless in \"%s\" command.", cmdname
);
error ("Item count other than 1 is meaningless in \"%s\" command.",
if (fmt
.format
== 'i' || fmt
.format
== 's')
error ("Format letter \"%c\" is meaningless in \"%s\" command.",
register struct cleanup
*old_chain
= 0;
register char format
= 0;
fmt
= decode_format (&exp
, last_format
, 0);
validate_format (fmt
, "print");
last_format
= format
= fmt
.format
;
expr
= parse_c_expression (exp
);
old_chain
= make_cleanup (free_current_contents
, &expr
);
val
= evaluate_expression (expr
);
val
= access_value_history (0);
histindex
= record_latest_value (val
);
if (histindex
>= 0) printf_filtered ("$%d = ", histindex
);
print_formatted (val
, format
, fmt
.size
);
register struct cleanup
*old_chain
;
register char format
= 0;
fmt
= decode_format (&exp
, 0, 0);
validate_format (fmt
, "print");
expr
= parse_c_expression (exp
);
old_chain
= make_cleanup (free_current_contents
, &expr
);
val
= evaluate_expression (expr
);
print_formatted (val
, format
, fmt
.size
);
struct expression
*expr
= parse_c_expression (exp
);
register struct cleanup
*old_chain
= make_cleanup (free_current_contents
, &expr
);
evaluate_expression (expr
);
register struct symbol
*sym
;
int is_a_field_of_this
; /* C++: lookup_symbol sets this to nonzero
if exp is a field of `this'. */
error ("Argument required.");
sym
= lookup_symbol (exp
, get_selected_block (), VAR_NAMESPACE
,
printf ("Symbol \"%s\" is a field of the local class variable `this'\n", exp
);
for (i
= 0; i
< misc_function_count
; i
++)
if (!strcmp (misc_function_vector
[i
].name
, exp
))
if (i
< misc_function_count
)
printf ("Symbol \"%s\" is at 0x%x in a file compiled without -g.\n",
exp
, misc_function_vector
[i
].address
);
error ("No symbol \"%s\" in current context.", exp
);
printf ("Symbol \"%s\" is ", SYMBOL_NAME (sym
));
val
= SYMBOL_VALUE (sym
);
switch (SYMBOL_CLASS (sym
))
printf ("a label at address 0x%x", val
);
printf ("a variable in register %s", reg_names
[val
]);
printf ("static at address 0x%x", val
);
printf ("an argument in register %s", reg_names
[val
]);
printf ("an argument at offset %d", val
);
printf ("a local variable at frame offset %d", val
);
printf ("a reference argument at offset %d", val
);
printf ("a function at address 0x%x",
BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)));
x_command (exp
, from_tty
)
struct cleanup
*old_chain
;
fmt
.format
= last_format
;
fmt
= decode_format (&exp
, last_format
, last_size
);
last_format
= fmt
.format
;
/* If we have an expression, evaluate it and use it as the address. */
if (exp
!= 0 && *exp
!= 0)
expr
= parse_c_expression (exp
);
/* Cause expression not to be there any more
if this command is repeated with Newline.
But don't clobber a user-defined command's definition. */
old_chain
= make_cleanup (free_current_contents
, &expr
);
val
= evaluate_expression (expr
);
/* In rvalue contexts, such as this, functions are coerced into
pointers to functions. This makes "x/i main" work. */
if (/* last_format == 'i'
&& */ TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_FUNC
&& VALUE_LVAL (val
) == lval_memory
)
next_address
= VALUE_ADDRESS (val
);
next_address
= (CORE_ADDR
) value_as_long (val
);
do_examine (fmt
, next_address
);
/* Set a couple of internal variables if appropriate. */
/* Make last address examined available to the user as $_. */
set_internalvar (lookup_internalvar ("_"),
value_from_long (builtin_type_int
,
(LONGEST
) last_examine_address
));
/* Make contents of last address examined available to the user as $__.*/
set_internalvar (lookup_internalvar ("__"), last_examine_value
);
/* Commands for printing types of things. */
register struct cleanup
*old_chain
;
expr
= parse_c_expression (exp
);
old_chain
= make_cleanup (free_current_contents
, &expr
);
val
= evaluate_type (expr
);
val
= access_value_history (0);
printf_filtered ("type = ");
/* Most of the time users do not want to see all the fields
in a structure. If they do they can use the "ptype" command.
type_print (VALUE_TYPE (val
), "", stdout
, -1);
register char *p
= typename
;
extern struct block
*get_current_block ();
= (have_inferior_p () || have_core_file_p ()) ? get_current_block () : 0;
register struct type
*type
;
error_no_arg ("type name");
while (*p
&& *p
!= ' ' && *p
!= '\t') p
++;
while (*p
== ' ' || *p
== '\t') p
++;
if (len
== 6 && !strncmp (typename
, "struct", 6))
type
= lookup_struct (p
, b
);
else if (len
== 5 && !strncmp (typename
, "union", 5))
type
= lookup_union (p
, b
);
else if (len
== 4 && !strncmp (typename
, "enum", 4))
type
= lookup_enum (p
, b
);
type
= lookup_typename (typename
, b
, 1);
register struct symbol
*sym
= lookup_symbol (typename
, b
, STRUCT_NAMESPACE
, 0);
error ("No type named %s.", typename
);
printf_filtered ("No type named %s, but there is a ",
switch (TYPE_CODE (SYMBOL_TYPE (sym
)))
printf_filtered ("struct");
printf_filtered ("union");
printf_filtered ("enum");
printf_filtered (" %s. Type \"help ptype\".\n", typename
);
type
= SYMBOL_TYPE (sym
);
type_print (type
, "", stdout
, 1);
enum display_status
{disabled
, enabled
};
/* Chain link to next auto-display item. */
/* Expression to be evaluated and displayed. */
/* Item number of this auto-display item. */
/* Display format specified. */
struct format_data format
;
/* Innermost block required by this expression when evaluated */
/* Status of this display (enabled or disabled) */
enum display_status status
;
/* Chain of expressions whose values should be displayed
automatically each time the program stops. */
static struct display
*display_chain
;
static int display_number
;
/* Add an expression to the auto-display chain.
Specify the expression. */
display_command (exp
, from_tty
)
register struct expression
*expr
;
register struct display
*new;
extern struct block
*innermost_block
;
fmt
= decode_format (&exp
, 0, 0);
if (fmt
.size
&& fmt
.format
== 0)
if (fmt
.format
== 'i' || fmt
.format
== 's')
expr
= parse_c_expression (exp
);
new = (struct display
*) xmalloc (sizeof (struct display
));
new->block
= innermost_block
;
new->next
= display_chain
;
new->number
= ++display_number
;
if (from_tty
&& have_inferior_p ())
/* Clear out the display_chain.
Done when new symtabs are loaded, since this invalidates
the types stored in many expressions. */
register struct display
*d
;
while (d
= display_chain
)
/* Delete the auto-display number NUM. */
register struct display
*d1
, *d
;
error ("No display number %d.", num
);
if (display_chain
->number
== num
)
display_chain
= d1
->next
;
for (d
= display_chain
; ; d
= d
->next
)
error ("No display number %d.", num
);
if (d
->next
->number
== num
)
/* Delete some values from the auto-display chain.
Specify the element numbers. */
register struct display
*d
, *d1
;
if (query ("Delete all auto-display expressions? "))
while (*p1
>= '0' && *p1
<= '9') p1
++;
if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
error ("Arguments must be display numbers.");
while (*p
== ' ' || *p
== '\t') p
++;
/* Display a single auto-display.
Do nothing if the display cannot be printed in the current context,
or if the display is disabled. */
int within_current_scope
;
if (d
->status
== disabled
)
within_current_scope
= contained_in (get_selected_block (), d
->block
);
within_current_scope
= 1;
if (!within_current_scope
)
current_display_number
= d
->number
;
printf_filtered ("%d: ", d
->number
);
if (d
->format
.count
!= 1)
printf_filtered ("%d", d
->format
.count
);
printf_filtered ("%c", d
->format
.format
);
if (d
->format
.format
!= 'i' && d
->format
.format
!= 's')
printf_filtered ("%c", d
->format
.size
);
print_expression (d
->exp
, stdout
);
if (d
->format
.count
!= 1)
(CORE_ADDR
) value_as_long (evaluate_expression (d
->exp
)));
printf_filtered ("/%c ", d
->format
.format
);
print_expression (d
->exp
, stdout
);
print_formatted (evaluate_expression (d
->exp
),
d
->format
.format
, d
->format
.size
);
current_display_number
= -1;
/* Display all of the values on the auto-display chain which can be
evaluated in the current scope. */
register struct display
*d
;
for (d
= display_chain
; d
; d
= d
->next
)
/* Delete the auto-display which we were in the process of displaying.
This is done when there is an error or a signal. */
register struct display
*d
;
for (d
= display_chain
; d
; d
= d
->next
)
printf ("No display number %d.\n", num
);
disable_current_display ()
if (current_display_number
>= 0)
disable_display (current_display_number
);
fprintf (stderr
, "Disabling display %d to avoid infinite recursion.\n",
current_display_number
= -1;
register struct display
*d
;
printf ("There are no auto-display expressions now.\n");
printf_filtered ("Auto-display expressions now in effect:\n\
for (d
= display_chain
; d
; d
= d
->next
)
printf_filtered ("%d: %c ", d
->number
, "ny"[(int)d
->status
]);
printf_filtered ("/%d%c%c ", d
->format
.count
, d
->format
.size
,
else if (d
->format
.format
)
printf_filtered ("/%c ", d
->format
.format
);
print_expression (d
->exp
, stdout
);
if (d
->block
&& !contained_in (get_selected_block (), d
->block
))
printf_filtered (" (cannot be evaluated in the current context)");
register struct display
*d
;
for (d
= display_chain
; d
; d
= d
->next
)
while (*p1
>= '0' && *p1
<= '9')
if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
error ("Arguments must be display numbers.");
for (d
= display_chain
; d
; d
= d
->next
)
printf ("No display number %d.\n", num
);
while (*p
== ' ' || *p
== '\t')
disable_display_command (args
, from_tty
)
register struct display
*d
;
for (d
= display_chain
; d
; d
= d
->next
)
while (*p1
>= '0' && *p1
<= '9')
if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
error ("Arguments must be display numbers.");
disable_display (atoi (p
));
while (*p
== ' ' || *p
== '\t')
/* Print the value in stack frame FRAME of a variable
specified by a struct symbol. */
print_variable_value (var
, frame
, stream
)
value val
= read_var_value (var
, frame
);
value_print (val
, stream
, 0, Val_pretty_default
);
/* Print the arguments of a stack frame, given the function FUNC
running in that frame (as a symbol), the info on the frame,
and the number of args according to the stack frame (or -1 if unknown). */
static void print_frame_nameless_args ();
print_frame_args (func
, fi
, num
, stream
)
register int last_regparm
= 0;
register struct symbol
*lastsym
, *sym
, *nextsym
;
/* Offset of stack argument that is at the highest offset.
-1 if we haven't come to a stack argument yet. */
CORE_ADDR highest_offset
= (CORE_ADDR
) -1;
register CORE_ADDR addr
= FRAME_ARGS_ADDRESS (fi
);
b
= SYMBOL_BLOCK_VALUE (func
);
for (i
= 0; i
< nsyms
; i
++)
if (SYMBOL_CLASS (sym
) != LOC_REGPARM
&& SYMBOL_CLASS (sym
) != LOC_ARG
&& SYMBOL_CLASS (sym
) != LOC_REF_ARG
)
/* Print the next arg. */
if (SYMBOL_CLASS (sym
) == LOC_REGPARM
)
val
= value_from_register (SYMBOL_TYPE (sym
),
int current_offset
= SYMBOL_VALUE (sym
);
int arg_size
= TYPE_LENGTH (SYMBOL_TYPE (sym
));
if (SYMBOL_CLASS (sym
) == LOC_REF_ARG
)
val
= value_at (SYMBOL_TYPE (sym
),
read_memory_integer (addr
+ current_offset
,
val
= value_at (SYMBOL_TYPE (sym
), addr
+ current_offset
);
/* Round up address of next arg to multiple of size of int. */
= (((current_offset
+ sizeof (int) - 1) / sizeof (int))
/* If this is the highest offset seen yet, set highest_offset. */
if (highest_offset
== (CORE_ADDR
)-1
+ (arg_size
- sizeof (int) + 3) / (sizeof (int)))
highest_offset
= current_offset
;
fprintf_filtered (stream
, ", ");
fputs_filtered (SYMBOL_NAME (sym
), stream
);
fputs_filtered ("=", stream
);
/* Nonzero if a LOC_ARG which is a struct is useless. */
#if !defined (STRUCT_ARG_SYM_GARBAGE)
#define STRUCT_ARG_SYM_GARBAGE(gcc_p) 0
if (STRUCT_ARG_SYM_GARBAGE (b
->gcc_compile_flag
)
&& TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_STRUCT
&& SYMBOL_CLASS (sym
) == LOC_ARG
)
/* Try looking up that name. SunOS4 puts out a usable
symbol as a local variable (in addition to the one
lookup_symbol (SYMBOL_NAME (sym
), b
, VAR_NAMESPACE
, 0);
val
= value_of_variable (sym2
);
fputs_filtered ("?", stream
);
value_print (val
, stream
, 0, Val_no_prettyprint
);
/* Don't print nameless args in situations where we don't know
enough about the stack to find them. */
if (highest_offset
!= (CORE_ADDR
) -1
&& num
* sizeof (int) + FRAME_ARGS_SKIP
> highest_offset
)
print_frame_nameless_args (fi
, addr
,
highest_offset
+ sizeof (int),
num
* sizeof (int) + FRAME_ARGS_SKIP
,
print_frame_nameless_args (fi
, addr
, FRAME_ARGS_SKIP
,
num
* sizeof (int) + FRAME_ARGS_SKIP
,
print_frame_nameless_args (fi
, argsaddr
, start
, end
, stream
)
extern void (*default_scalar_print
)();
for (p
= start
; p
< end
; p
+= sizeof(int)) {
#if defined(NAMELESS_ARG)
v
= NAMELESS_ARG(fi
, (p
- start
) / sizeof(int));
v
= read_memory_integer (argsaddr
+ p
, sizeof (int));
fprintf_filtered (stream
, s
);
(*default_scalar_print
) (stream
, builtin_type_int
, v
);
val_args
= (value
*) xmalloc (allocated_args
* sizeof (value
));
error_no_arg ("format-control string and values to print");
/* Skip white space before format string */
while (*s
== ' ' || *s
== '\t') s
++;
/* A format string should follow, enveloped in double quotes */
error ("Bad format string, missing '\"'.");
/* Parse the format-control string and copy it into the string STRING,
processing some kinds of escape sequence. */
f
= string
= (char *) alloca (strlen (s
) + 1);
error ("Bad format string, non-terminated '\"'.");
/* ??? TODO: handle other escape sequences */
error ("Unrecognized \\ escape character in format string.");
/* Skip over " and following space and comma. */
while (*s
== ' ' || *s
== '\t') s
++;
if (*s
!= ',' && *s
!= 0)
error ("Invalid argument syntax");
while (*s
== ' ' || *s
== '\t') s
++;
/* Now scan the string for %-specs and see what kinds of args they want.
argclass[I] classifies the %-specs so we can give vprintf something
enum argclass
{int_arg
, string_arg
, double_arg
, long_long_arg
};
argclass
= (enum argclass
*) alloca (strlen (s
) * sizeof *argclass
);
while (index ("0123456789.hlL-+ #", *f
))
if (*f
== 'l' || *f
== 'L')
argclass
[nargs_wanted
++] = string_arg
;
else if (*f
== 'e' || *f
== 'f' || *f
== 'g')
argclass
[nargs_wanted
++] = double_arg
;
argclass
[nargs_wanted
++] = long_long_arg
;
argclass
[nargs_wanted
++] = int_arg
;
/* Now, parse all arguments and evaluate them.
Store the VALUEs in VAL_ARGS. */
if (nargs
== allocated_args
)
val_args
= (value
*) xrealloc (val_args
,
val_args
[nargs
] = parse_to_comma_and_eval (&s1
);
/* If format string wants a float, unchecked-convert the value to
floating point of the same size */
if (argclass
[nargs
] == double_arg
)
if (TYPE_LENGTH (VALUE_TYPE (val_args
[nargs
])) == sizeof (float))
VALUE_TYPE (val_args
[nargs
]) = builtin_type_float
;
if (TYPE_LENGTH (VALUE_TYPE (val_args
[nargs
])) == sizeof (double))
VALUE_TYPE (val_args
[nargs
]) = builtin_type_double
;
if (nargs
!= nargs_wanted
)
error ("Wrong number of arguments for specified format-string");
/* Now lay out an argument-list containing the arguments
as doubles, integers and C pointers. */
arg_bytes
= (char *) alloca (sizeof (double) * nargs
);
for (i
= 0; i
< nargs
; i
++)
if (argclass
[i
] == string_arg
)
tem
= value_as_long (val_args
[i
]);
/* This is a %s argument. Find the length of the string. */
read_memory (tem
+ j
, &c
, 1);
/* Copy the string contents into a string inside GDB. */
str
= (char *) alloca (j
+ 1);
read_memory (tem
, str
, j
);
/* Pass address of internal copy as the arg to vprintf. */
*((int *) &arg_bytes
[argindex
]) = (int) str
;
argindex
+= sizeof (int);
else if (VALUE_TYPE (val_args
[i
])->code
== TYPE_CODE_FLT
)
*((double *) &arg_bytes
[argindex
]) = value_as_double (val_args
[i
]);
argindex
+= sizeof (double);
if (argclass
[i
] == long_long_arg
)
*(long long *) &arg_bytes
[argindex
] = value_as_long (val_args
[i
]);
argindex
+= sizeof (long long);
*((int *) &arg_bytes
[argindex
]) = value_as_long (val_args
[i
]);
argindex
+= sizeof (int);
vprintf (string
, arg_bytes
);
/* Helper function for asdump_command. Finds the bounds of a function
for a specified section of text. PC is an address within the
function which you want bounds for; *LOW and *HIGH are set to the
beginning (inclusive) and end (exclusive) of the function. This
function returns 1 on success and 0 on failure. */
containing_function_bounds (pc
, low
, high
)
CORE_ADDR pc
, *low
, *high
;
if (!find_pc_partial_function (pc
, 0, low
))
if (!find_pc_partial_function (scan
, 0, high
))
/* Dump a specified section of assembly code. With no command line
arguments, this command will dump the assembly code for the
function surrounding the pc value in the selected frame. With one
argument, it will dump the assembly code surrounding that pc value.
Two arguments are interpeted as bounds within which to dump
disassemble_command (arg
, from_tty
)
error ("No frame selected.\n");
pc
= get_frame_pc (selected_frame
);
if (!containing_function_bounds (pc
, &low
, &high
))
error ("No function contains pc specified by selected frame.\n");
else if (!(space_index
= (char *) index (arg
, ' ')))
pc
= parse_and_eval_address (arg
);
if (!containing_function_bounds (pc
, &low
, &high
))
error ("No function contains specified pc.\n");
low
= parse_and_eval_address (arg
);
high
= parse_and_eval_address (space_index
+ 1);
printf_filtered ("Dump of assembler code ");
find_pc_partial_function (pc
, &name
, 0);
printf_filtered ("for function %s:\n", name
);
printf_filtered ("from 0x%x to 0x%x:\n", low
, high
);
/* Dump the specified range. */
for (pc
= low
; pc
< high
; )
print_address (pc
, stdout
);
pc
+= print_insn (pc
, stdout
);
printf_filtered ("End of assembler dump.\n");
extern struct cmd_list_element
*enablelist
, *disablelist
, *deletelist
;
extern struct cmd_list_element
*cmdlist
, *setlist
;
current_display_number
= -1;
add_info ("address", address_info
,
"Describe where variable VAR is stored.");
add_com ("x", class_vars
, x_command
,
"Examine memory: x/FMT ADDRESS.\n\
ADDRESS is an expression for the memory address to examine.\n\
FMT is a repeat count followed by a format letter and a size letter.\n\
Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
f(float), a(address), i(instruction), c(char) and s(string).\n\
Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
g is meaningful only with f, for type double.\n\
The specified number of objects of the specified size are printed\n\
according to the format.\n\n\
Defaults for format and size letters are those previously used.\n\
Default count is 1. Default address is following last thing printed\n\
with this command or \"print\".");
add_com ("disassemble", class_vars
, disassemble_command
,
"Disassemble a specified section of memory.\n\
Default is the function surrounding the pc of the selected frame.\n\
With a single argument, the function surrounding that address is dumped.\n\
Two arguments are taken as a range of memory to dump.");
add_com ("ptype", class_vars
, ptype_command
,
"Print definition of type TYPE.\n\
Argument may be a type name defined by typedef, or \"struct STRUCTNAME\"\n\
or \"union UNIONNAME\" or \"enum ENUMNAME\".\n\
The selected stack frame's lexical context is used to look up the name.");
add_com ("whatis", class_vars
, whatis_command
,
"Print data type of expression EXP.");
add_info ("display", display_info
,
"Expressions to display when program stops, with code numbers.");
add_cmd ("undisplay", class_vars
, undisplay_command
,
"Cancel some expressions to be displayed when program stops.\n\
Arguments are the code numbers of the expressions to stop displaying.\n\
No argument means cancel all automatic-display expressions.\n\
\"delete display\" has the same effect as this command.\n\
Do \"info display\" to see current list of code numbers.",
add_com ("display", class_vars
, display_command
,
"Print value of expression EXP each time the program stops.\n\
/FMT may be used before EXP as in the \"print\" command.\n\
/FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
as in the \"x\" command, and then EXP is used to get the address to examine\n\
and examining is done as in the \"x\" command.\n\n\
With no argument, display all currently requested auto-display expressions.\n\
Use \"undisplay\" to cancel display requests previously made.");
add_cmd ("display", class_vars
, enable_display
,
"Enable some expressions to be displayed when program stops.\n\
Arguments are the code numbers of the expressions to resume displaying.\n\
No argument means enable all automatic-display expressions.\n\
Do \"info display\" to see current list of code numbers.", &enablelist
);
add_cmd ("display", class_vars
, disable_display_command
,
"Disable some expressions to be displayed when program stops.\n\
Arguments are the code numbers of the expressions to stop displaying.\n\
No argument means disable all automatic-display expressions.\n\
Do \"info display\" to see current list of code numbers.", &disablelist
);
add_cmd ("display", class_vars
, undisplay_command
,
"Cancel some expressions to be displayed when program stops.\n\
Arguments are the code numbers of the expressions to stop displaying.\n\
No argument means cancel all automatic-display expressions.\n\
Do \"info display\" to see current list of code numbers.", &deletelist
);
add_com ("printf", class_vars
, printf_command
,
"printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
This is useful for formatted output in user-defined commands.");
add_com ("output", class_vars
, output_command
,
"Like \"print\" but don't put in value history and don't print newline.\n\
This is useful in user-defined commands.");
add_prefix_cmd ("set", class_vars
, set_command
,
"Perform an assignment VAR = EXP.\n\
You must type the \"=\". VAR may be a debugger \"convenience\" variable\n\
(names starting with $), a register (a few standard names starting with $),\n\
or an actual variable in the program being debugged. EXP is any expression.\n\
Use \"set variable\" for variables with names identical to set subcommands.\n\
\nWith a subcommand, this command modifies parts of the gdb environment",
&setlist
, "set ", 1, &cmdlist
);
add_cmd ("variable", class_vars
, set_command
,
"Perform an assignment VAR = EXP.\n\
You must type the \"=\". VAR may be a debugger \"convenience\" variable\n\
(names starting with $), a register (a few standard names starting with $),\n\
or an actual variable in the program being debugged. EXP is any expression.\n\
This may usually be abbreviated to simply \"set\".",
add_com ("print", class_vars
, print_command
,
concat ("Print value of expression EXP.\n\
Variables accessible are those of the lexical environment of the selected\n\
stack frame, plus all those whose scope is global or an entire file.\n\
$NUM gets previous value number NUM. $ and $$ are the last two values.\n\
$$NUM refers to NUM'th value back from the last one.\n\
Names starting with $ refer to registers (with the values they would have\n\
if the program were to return to the stack frame now selected, restoring\n\
all registers saved by frames farther in) or else to debugger\n\
\"convenience\" variables (any such name not a known register).\n\
Use assignment expressions to give values to convenience variables.\n",
\{TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
@ is a binary operator for treating consecutive data objects\n\
anywhere in memory as an array. FOO@NUM gives an array whose first\n\
element is FOO, whose second element is stored in the space following\n\
where FOO is stored, etc. FOO must be an expression whose value\n\
EXP may be preceded with /FMT, where FMT is a format letter\n\
but no count or size letter (see \"x\" command)."));
add_com_alias ("p", "print", class_vars
, 1);