| /* Print values for GDB, the GNU debugger. |
| |
| Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, |
| 1996, 1997, 1998, 1999, 2000, 2001, 2002 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 |
| (at your option) any later version. |
| |
| This program 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 this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include "defs.h" |
| #include "gdb_string.h" |
| #include "symtab.h" |
| #include "gdbtypes.h" |
| #include "value.h" |
| #include "gdbcore.h" |
| #include "gdbcmd.h" |
| #include "target.h" |
| #include "language.h" |
| #include "annotate.h" |
| #include "valprint.h" |
| #include "floatformat.h" |
| #include "doublest.h" |
| |
| #include <errno.h> |
| |
| /* Prototypes for local functions */ |
| |
| static int partial_memory_read (CORE_ADDR memaddr, char *myaddr, |
| int len, int *errnoptr); |
| |
| static void print_hex_chars (struct ui_file *, unsigned char *, |
| unsigned int); |
| |
| static void show_print (char *, int); |
| |
| static void set_print (char *, int); |
| |
| static void set_radix (char *, int); |
| |
| static void show_radix (char *, int); |
| |
| static void set_input_radix (char *, int, struct cmd_list_element *); |
| |
| static void set_input_radix_1 (int, unsigned); |
| |
| static void set_output_radix (char *, int, struct cmd_list_element *); |
| |
| static void set_output_radix_1 (int, unsigned); |
| |
| void _initialize_valprint (void); |
| |
| /* Maximum number of chars to print for a string pointer value or vector |
| contents, or UINT_MAX for no limit. Note that "set print elements 0" |
| stores UINT_MAX in print_max, which displays in a show command as |
| "unlimited". */ |
| |
| unsigned int print_max; |
| #define PRINT_MAX_DEFAULT 200 /* Start print_max off at this value. */ |
| |
| /* Default input and output radixes, and output format letter. */ |
| |
| unsigned input_radix = 10; |
| unsigned output_radix = 10; |
| int output_format = 0; |
| |
| /* Print repeat counts if there are more than this many repetitions of an |
| element in an array. Referenced by the low level language dependent |
| print routines. */ |
| |
| unsigned int repeat_count_threshold = 10; |
| |
| /* If nonzero, stops printing of char arrays at first null. */ |
| |
| int stop_print_at_null; |
| |
| /* Controls pretty printing of structures. */ |
| |
| int prettyprint_structs; |
| |
| /* Controls pretty printing of arrays. */ |
| |
| int prettyprint_arrays; |
| |
| /* If nonzero, causes unions inside structures or other unions to be |
| printed. */ |
| |
| int unionprint; /* Controls printing of nested unions. */ |
| |
| /* If nonzero, causes machine addresses to be printed in certain contexts. */ |
| |
| int addressprint; /* Controls printing of machine addresses */ |
| |
| |
| /* Print data of type TYPE located at VALADDR (within GDB), which came from |
| the inferior at address ADDRESS, onto stdio stream STREAM according to |
| FORMAT (a letter, or 0 for natural format using TYPE). |
| |
| If DEREF_REF is nonzero, then dereference references, otherwise just print |
| them like pointers. |
| |
| The PRETTY parameter controls prettyprinting. |
| |
| If the data are a string pointer, returns the number of string characters |
| printed. |
| |
| FIXME: The data at VALADDR is in target byte order. If gdb is ever |
| enhanced to be able to debug more than the single target it was compiled |
| for (specific CPU type and thus specific target byte ordering), then |
| either the print routines are going to have to take this into account, |
| or the data is going to have to be passed into here already converted |
| to the host byte ordering, whichever is more convenient. */ |
| |
| |
| int |
| val_print (struct type *type, char *valaddr, int embedded_offset, |
| CORE_ADDR address, struct ui_file *stream, int format, int deref_ref, |
| int recurse, enum val_prettyprint pretty) |
| { |
| struct type *real_type = check_typedef (type); |
| if (pretty == Val_pretty_default) |
| { |
| pretty = prettyprint_structs ? Val_prettyprint : Val_no_prettyprint; |
| } |
| |
| QUIT; |
| |
| /* Ensure that the type is complete and not just a stub. If the type is |
| only a stub and we can't find and substitute its complete type, then |
| print appropriate string and return. */ |
| |
| if (TYPE_STUB (real_type)) |
| { |
| fprintf_filtered (stream, "<incomplete type>"); |
| gdb_flush (stream); |
| return (0); |
| } |
| |
| return (LA_VAL_PRINT (type, valaddr, embedded_offset, address, |
| stream, format, deref_ref, recurse, pretty)); |
| } |
| |
| /* Print the value VAL in C-ish syntax on stream STREAM. |
| FORMAT is a format-letter, or 0 for print in natural format of data type. |
| If the object printed is a string pointer, returns |
| the number of string bytes printed. */ |
| |
| int |
| value_print (struct value *val, struct ui_file *stream, int format, |
| enum val_prettyprint pretty) |
| { |
| if (val == 0) |
| { |
| printf_filtered ("<address of value unknown>"); |
| return 0; |
| } |
| if (VALUE_OPTIMIZED_OUT (val)) |
| { |
| printf_filtered ("<value optimized out>"); |
| return 0; |
| } |
| return LA_VALUE_PRINT (val, stream, format, pretty); |
| } |
| |
| /* Called by various <lang>_val_print routines to print |
| TYPE_CODE_INT's. TYPE is the type. VALADDR is the address of the |
| value. STREAM is where to print the value. */ |
| |
| void |
| val_print_type_code_int (struct type *type, char *valaddr, |
| struct ui_file *stream) |
| { |
| if (TYPE_LENGTH (type) > sizeof (LONGEST)) |
| { |
| LONGEST val; |
| |
| if (TYPE_UNSIGNED (type) |
| && extract_long_unsigned_integer (valaddr, TYPE_LENGTH (type), |
| &val)) |
| { |
| print_longest (stream, 'u', 0, val); |
| } |
| else |
| { |
| /* Signed, or we couldn't turn an unsigned value into a |
| LONGEST. For signed values, one could assume two's |
| complement (a reasonable assumption, I think) and do |
| better than this. */ |
| print_hex_chars (stream, (unsigned char *) valaddr, |
| TYPE_LENGTH (type)); |
| } |
| } |
| else |
| { |
| print_longest (stream, TYPE_UNSIGNED (type) ? 'u' : 'd', 0, |
| unpack_long (type, valaddr)); |
| } |
| } |
| |
| /* Print a number according to FORMAT which is one of d,u,x,o,b,h,w,g. |
| The raison d'etre of this function is to consolidate printing of |
| LONG_LONG's into this one function. Some platforms have long longs but |
| don't have a printf() that supports "ll" in the format string. We handle |
| these by seeing if the number is representable as either a signed or |
| unsigned long, depending upon what format is desired, and if not we just |
| bail out and print the number in hex. |
| |
| The format chars b,h,w,g are from print_scalar_formatted(). If USE_LOCAL, |
| format it according to the current language (this should be used for most |
| integers which GDB prints, the exception is things like protocols where |
| the format of the integer is a protocol thing, not a user-visible thing). |
| */ |
| |
| #if defined (CC_HAS_LONG_LONG) && !defined (PRINTF_HAS_LONG_LONG) |
| static void print_decimal (struct ui_file * stream, char *sign, |
| int use_local, ULONGEST val_ulong); |
| static void |
| print_decimal (struct ui_file *stream, char *sign, int use_local, |
| ULONGEST val_ulong) |
| { |
| unsigned long temp[3]; |
| int i = 0; |
| do |
| { |
| temp[i] = val_ulong % (1000 * 1000 * 1000); |
| val_ulong /= (1000 * 1000 * 1000); |
| i++; |
| } |
| while (val_ulong != 0 && i < (sizeof (temp) / sizeof (temp[0]))); |
| switch (i) |
| { |
| case 1: |
| fprintf_filtered (stream, "%s%lu", |
| sign, temp[0]); |
| break; |
| case 2: |
| fprintf_filtered (stream, "%s%lu%09lu", |
| sign, temp[1], temp[0]); |
| break; |
| case 3: |
| fprintf_filtered (stream, "%s%lu%09lu%09lu", |
| sign, temp[2], temp[1], temp[0]); |
| break; |
| default: |
| internal_error (__FILE__, __LINE__, "failed internal consistency check"); |
| } |
| return; |
| } |
| #endif |
| |
| void |
| print_longest (struct ui_file *stream, int format, int use_local, |
| LONGEST val_long) |
| { |
| #if defined (CC_HAS_LONG_LONG) && !defined (PRINTF_HAS_LONG_LONG) |
| if (sizeof (long) < sizeof (LONGEST)) |
| { |
| switch (format) |
| { |
| case 'd': |
| { |
| /* Print a signed value, that doesn't fit in a long */ |
| if ((long) val_long != val_long) |
| { |
| if (val_long < 0) |
| print_decimal (stream, "-", use_local, -val_long); |
| else |
| print_decimal (stream, "", use_local, val_long); |
| return; |
| } |
| break; |
| } |
| case 'u': |
| { |
| /* Print an unsigned value, that doesn't fit in a long */ |
| if ((unsigned long) val_long != (ULONGEST) val_long) |
| { |
| print_decimal (stream, "", use_local, val_long); |
| return; |
| } |
| break; |
| } |
| case 'x': |
| case 'o': |
| case 'b': |
| case 'h': |
| case 'w': |
| case 'g': |
| /* Print as unsigned value, must fit completely in unsigned long */ |
| { |
| unsigned long temp = val_long; |
| if (temp != val_long) |
| { |
| /* Urk, can't represent value in long so print in hex. |
| Do shift in two operations so that if sizeof (long) |
| == sizeof (LONGEST) we can avoid warnings from |
| picky compilers about shifts >= the size of the |
| shiftee in bits */ |
| unsigned long vbot = (unsigned long) val_long; |
| LONGEST temp = (val_long >> (sizeof (long) * HOST_CHAR_BIT - 1)); |
| unsigned long vtop = temp >> 1; |
| fprintf_filtered (stream, "0x%lx%08lx", vtop, vbot); |
| return; |
| } |
| break; |
| } |
| } |
| } |
| #endif |
| |
| #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG) |
| switch (format) |
| { |
| case 'd': |
| fprintf_filtered (stream, |
| use_local ? local_decimal_format_custom ("ll") |
| : "%lld", |
| (long long) val_long); |
| break; |
| case 'u': |
| fprintf_filtered (stream, "%llu", (long long) val_long); |
| break; |
| case 'x': |
| fprintf_filtered (stream, |
| use_local ? local_hex_format_custom ("ll") |
| : "%llx", |
| (unsigned long long) val_long); |
| break; |
| case 'o': |
| fprintf_filtered (stream, |
| use_local ? local_octal_format_custom ("ll") |
| : "%llo", |
| (unsigned long long) val_long); |
| break; |
| case 'b': |
| fprintf_filtered (stream, local_hex_format_custom ("02ll"), val_long); |
| break; |
| case 'h': |
| fprintf_filtered (stream, local_hex_format_custom ("04ll"), val_long); |
| break; |
| case 'w': |
| fprintf_filtered (stream, local_hex_format_custom ("08ll"), val_long); |
| break; |
| case 'g': |
| fprintf_filtered (stream, local_hex_format_custom ("016ll"), val_long); |
| break; |
| default: |
| internal_error (__FILE__, __LINE__, "failed internal consistency check"); |
| } |
| #else /* !CC_HAS_LONG_LONG || !PRINTF_HAS_LONG_LONG */ |
| /* In the following it is important to coerce (val_long) to a long. It does |
| nothing if !LONG_LONG, but it will chop off the top half (which we know |
| we can ignore) if the host supports long longs. */ |
| |
| switch (format) |
| { |
| case 'd': |
| fprintf_filtered (stream, |
| use_local ? local_decimal_format_custom ("l") |
| : "%ld", |
| (long) val_long); |
| break; |
| case 'u': |
| fprintf_filtered (stream, "%lu", (unsigned long) val_long); |
| break; |
| case 'x': |
| fprintf_filtered (stream, |
| use_local ? local_hex_format_custom ("l") |
| : "%lx", |
| (unsigned long) val_long); |
| break; |
| case 'o': |
| fprintf_filtered (stream, |
| use_local ? local_octal_format_custom ("l") |
| : "%lo", |
| (unsigned long) val_long); |
| break; |
| case 'b': |
| fprintf_filtered (stream, local_hex_format_custom ("02l"), |
| (unsigned long) val_long); |
| break; |
| case 'h': |
| fprintf_filtered (stream, local_hex_format_custom ("04l"), |
| (unsigned long) val_long); |
| break; |
| case 'w': |
| fprintf_filtered (stream, local_hex_format_custom ("08l"), |
| (unsigned long) val_long); |
| break; |
| case 'g': |
| fprintf_filtered (stream, local_hex_format_custom ("016l"), |
| (unsigned long) val_long); |
| break; |
| default: |
| internal_error (__FILE__, __LINE__, "failed internal consistency check"); |
| } |
| #endif /* CC_HAS_LONG_LONG || PRINTF_HAS_LONG_LONG */ |
| } |
| |
| /* This used to be a macro, but I don't think it is called often enough |
| to merit such treatment. */ |
| /* Convert a LONGEST to an int. This is used in contexts (e.g. number of |
| arguments to a function, number in a value history, register number, etc.) |
| where the value must not be larger than can fit in an int. */ |
| |
| int |
| longest_to_int (LONGEST arg) |
| { |
| /* Let the compiler do the work */ |
| int rtnval = (int) arg; |
| |
| /* Check for overflows or underflows */ |
| if (sizeof (LONGEST) > sizeof (int)) |
| { |
| if (rtnval != arg) |
| { |
| error ("Value out of range."); |
| } |
| } |
| return (rtnval); |
| } |
| |
| /* Print a floating point value of type TYPE (not always a |
| TYPE_CODE_FLT), pointed to in GDB by VALADDR, on STREAM. */ |
| |
| void |
| print_floating (char *valaddr, struct type *type, struct ui_file *stream) |
| { |
| DOUBLEST doub; |
| int inv; |
| const struct floatformat *fmt = NULL; |
| unsigned len = TYPE_LENGTH (type); |
| |
| /* If it is a floating-point, check for obvious problems. */ |
| if (TYPE_CODE (type) == TYPE_CODE_FLT) |
| fmt = floatformat_from_type (type); |
| if (fmt != NULL && floatformat_is_nan (fmt, valaddr)) |
| { |
| if (floatformat_is_negative (fmt, valaddr)) |
| fprintf_filtered (stream, "-"); |
| fprintf_filtered (stream, "nan("); |
| fputs_filtered (local_hex_format_prefix (), stream); |
| fputs_filtered (floatformat_mantissa (fmt, valaddr), stream); |
| fputs_filtered (local_hex_format_suffix (), stream); |
| fprintf_filtered (stream, ")"); |
| return; |
| } |
| |
| /* NOTE: cagney/2002-01-15: The TYPE passed into print_floating() |
| isn't necessarily a TYPE_CODE_FLT. Consequently, unpack_double |
| needs to be used as that takes care of any necessary type |
| conversions. Such conversions are of course direct to DOUBLEST |
| and disregard any possible target floating point limitations. |
| For instance, a u64 would be converted and displayed exactly on a |
| host with 80 bit DOUBLEST but with loss of information on a host |
| with 64 bit DOUBLEST. */ |
| |
| doub = unpack_double (type, valaddr, &inv); |
| if (inv) |
| { |
| fprintf_filtered (stream, "<invalid float value>"); |
| return; |
| } |
| |
| /* FIXME: kettenis/2001-01-20: The following code makes too much |
| assumptions about the host and target floating point format. */ |
| |
| /* NOTE: cagney/2002-02-03: Since the TYPE of what was passed in may |
| not necessarially be a TYPE_CODE_FLT, the below ignores that and |
| instead uses the type's length to determine the precision of the |
| floating-point value being printed. */ |
| |
| if (len < sizeof (double)) |
| fprintf_filtered (stream, "%.9g", (double) doub); |
| else if (len == sizeof (double)) |
| fprintf_filtered (stream, "%.17g", (double) doub); |
| else |
| #ifdef PRINTF_HAS_LONG_DOUBLE |
| fprintf_filtered (stream, "%.35Lg", doub); |
| #else |
| /* This at least wins with values that are representable as |
| doubles. */ |
| fprintf_filtered (stream, "%.17g", (double) doub); |
| #endif |
| } |
| |
| void |
| print_binary_chars (struct ui_file *stream, unsigned char *valaddr, |
| unsigned len) |
| { |
| |
| #define BITS_IN_BYTES 8 |
| |
| unsigned char *p; |
| unsigned int i; |
| int b; |
| |
| /* Declared "int" so it will be signed. |
| * This ensures that right shift will shift in zeros. |
| */ |
| const int mask = 0x080; |
| |
| /* FIXME: We should be not printing leading zeroes in most cases. */ |
| |
| fputs_filtered (local_binary_format_prefix (), stream); |
| if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) |
| { |
| for (p = valaddr; |
| p < valaddr + len; |
| p++) |
| { |
| /* Every byte has 8 binary characters; peel off |
| * and print from the MSB end. |
| */ |
| for (i = 0; i < (BITS_IN_BYTES * sizeof (*p)); i++) |
| { |
| if (*p & (mask >> i)) |
| b = 1; |
| else |
| b = 0; |
| |
| fprintf_filtered (stream, "%1d", b); |
| } |
| } |
| } |
| else |
| { |
| for (p = valaddr + len - 1; |
| p >= valaddr; |
| p--) |
| { |
| for (i = 0; i < (BITS_IN_BYTES * sizeof (*p)); i++) |
| { |
| if (*p & (mask >> i)) |
| b = 1; |
| else |
| b = 0; |
| |
| fprintf_filtered (stream, "%1d", b); |
| } |
| } |
| } |
| fputs_filtered (local_binary_format_suffix (), stream); |
| } |
| |
| /* VALADDR points to an integer of LEN bytes. |
| * Print it in octal on stream or format it in buf. |
| */ |
| void |
| print_octal_chars (struct ui_file *stream, unsigned char *valaddr, unsigned len) |
| { |
| unsigned char *p; |
| unsigned char octa1, octa2, octa3, carry; |
| int cycle; |
| |
| /* FIXME: We should be not printing leading zeroes in most cases. */ |
| |
| |
| /* Octal is 3 bits, which doesn't fit. Yuk. So we have to track |
| * the extra bits, which cycle every three bytes: |
| * |
| * Byte side: 0 1 2 3 |
| * | | | | |
| * bit number 123 456 78 | 9 012 345 6 | 78 901 234 | 567 890 12 | |
| * |
| * Octal side: 0 1 carry 3 4 carry ... |
| * |
| * Cycle number: 0 1 2 |
| * |
| * But of course we are printing from the high side, so we have to |
| * figure out where in the cycle we are so that we end up with no |
| * left over bits at the end. |
| */ |
| #define BITS_IN_OCTAL 3 |
| #define HIGH_ZERO 0340 |
| #define LOW_ZERO 0016 |
| #define CARRY_ZERO 0003 |
| #define HIGH_ONE 0200 |
| #define MID_ONE 0160 |
| #define LOW_ONE 0016 |
| #define CARRY_ONE 0001 |
| #define HIGH_TWO 0300 |
| #define MID_TWO 0070 |
| #define LOW_TWO 0007 |
| |
| /* For 32 we start in cycle 2, with two bits and one bit carry; |
| * for 64 in cycle in cycle 1, with one bit and a two bit carry. |
| */ |
| cycle = (len * BITS_IN_BYTES) % BITS_IN_OCTAL; |
| carry = 0; |
| |
| fputs_filtered (local_octal_format_prefix (), stream); |
| if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) |
| { |
| for (p = valaddr; |
| p < valaddr + len; |
| p++) |
| { |
| switch (cycle) |
| { |
| case 0: |
| /* No carry in, carry out two bits. |
| */ |
| octa1 = (HIGH_ZERO & *p) >> 5; |
| octa2 = (LOW_ZERO & *p) >> 2; |
| carry = (CARRY_ZERO & *p); |
| fprintf_filtered (stream, "%o", octa1); |
| fprintf_filtered (stream, "%o", octa2); |
| break; |
| |
| case 1: |
| /* Carry in two bits, carry out one bit. |
| */ |
| octa1 = (carry << 1) | ((HIGH_ONE & *p) >> 7); |
| octa2 = (MID_ONE & *p) >> 4; |
| octa3 = (LOW_ONE & *p) >> 1; |
| carry = (CARRY_ONE & *p); |
| fprintf_filtered (stream, "%o", octa1); |
| fprintf_filtered (stream, "%o", octa2); |
| fprintf_filtered (stream, "%o", octa3); |
| break; |
| |
| case 2: |
| /* Carry in one bit, no carry out. |
| */ |
| octa1 = (carry << 2) | ((HIGH_TWO & *p) >> 6); |
| octa2 = (MID_TWO & *p) >> 3; |
| octa3 = (LOW_TWO & *p); |
| carry = 0; |
| fprintf_filtered (stream, "%o", octa1); |
| fprintf_filtered (stream, "%o", octa2); |
| fprintf_filtered (stream, "%o", octa3); |
| break; |
| |
| default: |
| error ("Internal error in octal conversion;"); |
| } |
| |
| cycle++; |
| cycle = cycle % BITS_IN_OCTAL; |
| } |
| } |
| else |
| { |
| for (p = valaddr + len - 1; |
| p >= valaddr; |
| p--) |
| { |
| switch (cycle) |
| { |
| case 0: |
| /* Carry out, no carry in */ |
| octa1 = (HIGH_ZERO & *p) >> 5; |
| octa2 = (LOW_ZERO & *p) >> 2; |
| carry = (CARRY_ZERO & *p); |
| fprintf_filtered (stream, "%o", octa1); |
| fprintf_filtered (stream, "%o", octa2); |
| break; |
| |
| case 1: |
| /* Carry in, carry out */ |
| octa1 = (carry << 1) | ((HIGH_ONE & *p) >> 7); |
| octa2 = (MID_ONE & *p) >> 4; |
| octa3 = (LOW_ONE & *p) >> 1; |
| carry = (CARRY_ONE & *p); |
| fprintf_filtered (stream, "%o", octa1); |
| fprintf_filtered (stream, "%o", octa2); |
| fprintf_filtered (stream, "%o", octa3); |
| break; |
| |
| case 2: |
| /* Carry in, no carry out */ |
| octa1 = (carry << 2) | ((HIGH_TWO & *p) >> 6); |
| octa2 = (MID_TWO & *p) >> 3; |
| octa3 = (LOW_TWO & *p); |
| carry = 0; |
| fprintf_filtered (stream, "%o", octa1); |
| fprintf_filtered (stream, "%o", octa2); |
| fprintf_filtered (stream, "%o", octa3); |
| break; |
| |
| default: |
| error ("Internal error in octal conversion;"); |
| } |
| |
| cycle++; |
| cycle = cycle % BITS_IN_OCTAL; |
| } |
| } |
| |
| fputs_filtered (local_octal_format_suffix (), stream); |
| } |
| |
| /* VALADDR points to an integer of LEN bytes. |
| * Print it in decimal on stream or format it in buf. |
| */ |
| void |
| print_decimal_chars (struct ui_file *stream, unsigned char *valaddr, |
| unsigned len) |
| { |
| #define TEN 10 |
| #define TWO_TO_FOURTH 16 |
| #define CARRY_OUT( x ) ((x) / TEN) /* extend char to int */ |
| #define CARRY_LEFT( x ) ((x) % TEN) |
| #define SHIFT( x ) ((x) << 4) |
| #define START_P \ |
| ((TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) ? valaddr : valaddr + len - 1) |
| #define NOT_END_P \ |
| ((TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) ? (p < valaddr + len) : (p >= valaddr)) |
| #define NEXT_P \ |
| ((TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) ? p++ : p-- ) |
| #define LOW_NIBBLE( x ) ( (x) & 0x00F) |
| #define HIGH_NIBBLE( x ) (((x) & 0x0F0) >> 4) |
| |
| unsigned char *p; |
| unsigned char *digits; |
| int carry; |
| int decimal_len; |
| int i, j, decimal_digits; |
| int dummy; |
| int flip; |
| |
| /* Base-ten number is less than twice as many digits |
| * as the base 16 number, which is 2 digits per byte. |
| */ |
| decimal_len = len * 2 * 2; |
| digits = xmalloc (decimal_len); |
| |
| for (i = 0; i < decimal_len; i++) |
| { |
| digits[i] = 0; |
| } |
| |
| fputs_filtered (local_decimal_format_prefix (), stream); |
| |
| /* Ok, we have an unknown number of bytes of data to be printed in |
| * decimal. |
| * |
| * Given a hex number (in nibbles) as XYZ, we start by taking X and |
| * decemalizing it as "x1 x2" in two decimal nibbles. Then we multiply |
| * the nibbles by 16, add Y and re-decimalize. Repeat with Z. |
| * |
| * The trick is that "digits" holds a base-10 number, but sometimes |
| * the individual digits are > 10. |
| * |
| * Outer loop is per nibble (hex digit) of input, from MSD end to |
| * LSD end. |
| */ |
| decimal_digits = 0; /* Number of decimal digits so far */ |
| p = START_P; |
| flip = 0; |
| while (NOT_END_P) |
| { |
| /* |
| * Multiply current base-ten number by 16 in place. |
| * Each digit was between 0 and 9, now is between |
| * 0 and 144. |
| */ |
| for (j = 0; j < decimal_digits; j++) |
| { |
| digits[j] = SHIFT (digits[j]); |
| } |
| |
| /* Take the next nibble off the input and add it to what |
| * we've got in the LSB position. Bottom 'digit' is now |
| * between 0 and 159. |
| * |
| * "flip" is used to run this loop twice for each byte. |
| */ |
| if (flip == 0) |
| { |
| /* Take top nibble. |
| */ |
| digits[0] += HIGH_NIBBLE (*p); |
| flip = 1; |
| } |
| else |
| { |
| /* Take low nibble and bump our pointer "p". |
| */ |
| digits[0] += LOW_NIBBLE (*p); |
| NEXT_P; |
| flip = 0; |
| } |
| |
| /* Re-decimalize. We have to do this often enough |
| * that we don't overflow, but once per nibble is |
| * overkill. Easier this way, though. Note that the |
| * carry is often larger than 10 (e.g. max initial |
| * carry out of lowest nibble is 15, could bubble all |
| * the way up greater than 10). So we have to do |
| * the carrying beyond the last current digit. |
| */ |
| carry = 0; |
| for (j = 0; j < decimal_len - 1; j++) |
| { |
| digits[j] += carry; |
| |
| /* "/" won't handle an unsigned char with |
| * a value that if signed would be negative. |
| * So extend to longword int via "dummy". |
| */ |
| dummy = digits[j]; |
| carry = CARRY_OUT (dummy); |
| digits[j] = CARRY_LEFT (dummy); |
| |
| if (j >= decimal_digits && carry == 0) |
| { |
| /* |
| * All higher digits are 0 and we |
| * no longer have a carry. |
| * |
| * Note: "j" is 0-based, "decimal_digits" is |
| * 1-based. |
| */ |
| decimal_digits = j + 1; |
| break; |
| } |
| } |
| } |
| |
| /* Ok, now "digits" is the decimal representation, with |
| * the "decimal_digits" actual digits. Print! |
| */ |
| for (i = decimal_digits - 1; i >= 0; i--) |
| { |
| fprintf_filtered (stream, "%1d", digits[i]); |
| } |
| xfree (digits); |
| |
| fputs_filtered (local_decimal_format_suffix (), stream); |
| } |
| |
| /* VALADDR points to an integer of LEN bytes. Print it in hex on stream. */ |
| |
| static void |
| print_hex_chars (struct ui_file *stream, unsigned char *valaddr, unsigned len) |
| { |
| unsigned char *p; |
| |
| /* FIXME: We should be not printing leading zeroes in most cases. */ |
| |
| fputs_filtered (local_hex_format_prefix (), stream); |
| if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) |
| { |
| for (p = valaddr; |
| p < valaddr + len; |
| p++) |
| { |
| fprintf_filtered (stream, "%02x", *p); |
| } |
| } |
| else |
| { |
| for (p = valaddr + len - 1; |
| p >= valaddr; |
| p--) |
| { |
| fprintf_filtered (stream, "%02x", *p); |
| } |
| } |
| fputs_filtered (local_hex_format_suffix (), stream); |
| } |
| |
| /* Called by various <lang>_val_print routines to print elements of an |
| array in the form "<elem1>, <elem2>, <elem3>, ...". |
| |
| (FIXME?) Assumes array element separator is a comma, which is correct |
| for all languages currently handled. |
| (FIXME?) Some languages have a notation for repeated array elements, |
| perhaps we should try to use that notation when appropriate. |
| */ |
| |
| void |
| val_print_array_elements (struct type *type, char *valaddr, CORE_ADDR address, |
| struct ui_file *stream, int format, int deref_ref, |
| int recurse, enum val_prettyprint pretty, |
| unsigned int i) |
| { |
| unsigned int things_printed = 0; |
| unsigned len; |
| struct type *elttype; |
| unsigned eltlen; |
| /* Position of the array element we are examining to see |
| whether it is repeated. */ |
| unsigned int rep1; |
| /* Number of repetitions we have detected so far. */ |
| unsigned int reps; |
| |
| elttype = TYPE_TARGET_TYPE (type); |
| eltlen = TYPE_LENGTH (check_typedef (elttype)); |
| len = TYPE_LENGTH (type) / eltlen; |
| |
| annotate_array_section_begin (i, elttype); |
| |
| for (; i < len && things_printed < print_max; i++) |
| { |
| if (i != 0) |
| { |
| if (prettyprint_arrays) |
| { |
| fprintf_filtered (stream, ",\n"); |
| print_spaces_filtered (2 + 2 * recurse, stream); |
| } |
| else |
| { |
| fprintf_filtered (stream, ", "); |
| } |
| } |
| wrap_here (n_spaces (2 + 2 * recurse)); |
| |
| rep1 = i + 1; |
| reps = 1; |
| while ((rep1 < len) && |
| !memcmp (valaddr + i * eltlen, valaddr + rep1 * eltlen, eltlen)) |
| { |
| ++reps; |
| ++rep1; |
| } |
| |
| if (reps > repeat_count_threshold) |
| { |
| val_print (elttype, valaddr + i * eltlen, 0, 0, stream, format, |
| deref_ref, recurse + 1, pretty); |
| annotate_elt_rep (reps); |
| fprintf_filtered (stream, " <repeats %u times>", reps); |
| annotate_elt_rep_end (); |
| |
| i = rep1 - 1; |
| things_printed += repeat_count_threshold; |
| } |
| else |
| { |
| val_print (elttype, valaddr + i * eltlen, 0, 0, stream, format, |
| deref_ref, recurse + 1, pretty); |
| annotate_elt (); |
| things_printed++; |
| } |
| } |
| annotate_array_section_end (); |
| if (i < len) |
| { |
| fprintf_filtered (stream, "..."); |
| } |
| } |
| |
| /* Read LEN bytes of target memory at address MEMADDR, placing the |
| results in GDB's memory at MYADDR. Returns a count of the bytes |
| actually read, and optionally an errno value in the location |
| pointed to by ERRNOPTR if ERRNOPTR is non-null. */ |
| |
| /* FIXME: cagney/1999-10-14: Only used by val_print_string. Can this |
| function be eliminated. */ |
| |
| static int |
| partial_memory_read (CORE_ADDR memaddr, char *myaddr, int len, int *errnoptr) |
| { |
| int nread; /* Number of bytes actually read. */ |
| int errcode; /* Error from last read. */ |
| |
| /* First try a complete read. */ |
| errcode = target_read_memory (memaddr, myaddr, len); |
| if (errcode == 0) |
| { |
| /* Got it all. */ |
| nread = len; |
| } |
| else |
| { |
| /* Loop, reading one byte at a time until we get as much as we can. */ |
| for (errcode = 0, nread = 0; len > 0 && errcode == 0; nread++, len--) |
| { |
| errcode = target_read_memory (memaddr++, myaddr++, 1); |
| } |
| /* If an error, the last read was unsuccessful, so adjust count. */ |
| if (errcode != 0) |
| { |
| nread--; |
| } |
| } |
| if (errnoptr != NULL) |
| { |
| *errnoptr = errcode; |
| } |
| return (nread); |
| } |
| |
| /* Print a string from the inferior, starting at ADDR and printing up to LEN |
| characters, of WIDTH bytes a piece, to STREAM. If LEN is -1, printing |
| stops at the first null byte, otherwise printing proceeds (including null |
| bytes) until either print_max or LEN characters have been printed, |
| whichever is smaller. */ |
| |
| /* FIXME: Use target_read_string. */ |
| |
| int |
| val_print_string (CORE_ADDR addr, int len, int width, struct ui_file *stream) |
| { |
| int force_ellipsis = 0; /* Force ellipsis to be printed if nonzero. */ |
| int errcode; /* Errno returned from bad reads. */ |
| unsigned int fetchlimit; /* Maximum number of chars to print. */ |
| unsigned int nfetch; /* Chars to fetch / chars fetched. */ |
| unsigned int chunksize; /* Size of each fetch, in chars. */ |
| char *buffer = NULL; /* Dynamically growable fetch buffer. */ |
| char *bufptr; /* Pointer to next available byte in buffer. */ |
| char *limit; /* First location past end of fetch buffer. */ |
| struct cleanup *old_chain = NULL; /* Top of the old cleanup chain. */ |
| int found_nul; /* Non-zero if we found the nul char */ |
| |
| /* First we need to figure out the limit on the number of characters we are |
| going to attempt to fetch and print. This is actually pretty simple. If |
| LEN >= zero, then the limit is the minimum of LEN and print_max. If |
| LEN is -1, then the limit is print_max. This is true regardless of |
| whether print_max is zero, UINT_MAX (unlimited), or something in between, |
| because finding the null byte (or available memory) is what actually |
| limits the fetch. */ |
| |
| fetchlimit = (len == -1 ? print_max : min (len, print_max)); |
| |
| /* Now decide how large of chunks to try to read in one operation. This |
| is also pretty simple. If LEN >= zero, then we want fetchlimit chars, |
| so we might as well read them all in one operation. If LEN is -1, we |
| are looking for a null terminator to end the fetching, so we might as |
| well read in blocks that are large enough to be efficient, but not so |
| large as to be slow if fetchlimit happens to be large. So we choose the |
| minimum of 8 and fetchlimit. We used to use 200 instead of 8 but |
| 200 is way too big for remote debugging over a serial line. */ |
| |
| chunksize = (len == -1 ? min (8, fetchlimit) : fetchlimit); |
| |
| /* Loop until we either have all the characters to print, or we encounter |
| some error, such as bumping into the end of the address space. */ |
| |
| found_nul = 0; |
| old_chain = make_cleanup (null_cleanup, 0); |
| |
| if (len > 0) |
| { |
| buffer = (char *) xmalloc (len * width); |
| bufptr = buffer; |
| old_chain = make_cleanup (xfree, buffer); |
| |
| nfetch = partial_memory_read (addr, bufptr, len * width, &errcode) |
| / width; |
| addr += nfetch * width; |
| bufptr += nfetch * width; |
| } |
| else if (len == -1) |
| { |
| unsigned long bufsize = 0; |
| do |
| { |
| QUIT; |
| nfetch = min (chunksize, fetchlimit - bufsize); |
| |
| if (buffer == NULL) |
| buffer = (char *) xmalloc (nfetch * width); |
| else |
| { |
| discard_cleanups (old_chain); |
| buffer = (char *) xrealloc (buffer, (nfetch + bufsize) * width); |
| } |
| |
| old_chain = make_cleanup (xfree, buffer); |
| bufptr = buffer + bufsize * width; |
| bufsize += nfetch; |
| |
| /* Read as much as we can. */ |
| nfetch = partial_memory_read (addr, bufptr, nfetch * width, &errcode) |
| / width; |
| |
| /* Scan this chunk for the null byte that terminates the string |
| to print. If found, we don't need to fetch any more. Note |
| that bufptr is explicitly left pointing at the next character |
| after the null byte, or at the next character after the end of |
| the buffer. */ |
| |
| limit = bufptr + nfetch * width; |
| while (bufptr < limit) |
| { |
| unsigned long c; |
| |
| c = extract_unsigned_integer (bufptr, width); |
| addr += width; |
| bufptr += width; |
| if (c == 0) |
| { |
| /* We don't care about any error which happened after |
| the NULL terminator. */ |
| errcode = 0; |
| found_nul = 1; |
| break; |
| } |
| } |
| } |
| while (errcode == 0 /* no error */ |
| && bufptr - buffer < fetchlimit * width /* no overrun */ |
| && !found_nul); /* haven't found nul yet */ |
| } |
| else |
| { /* length of string is really 0! */ |
| buffer = bufptr = NULL; |
| errcode = 0; |
| } |
| |
| /* bufptr and addr now point immediately beyond the last byte which we |
| consider part of the string (including a '\0' which ends the string). */ |
| |
| /* We now have either successfully filled the buffer to fetchlimit, or |
| terminated early due to an error or finding a null char when LEN is -1. */ |
| |
| if (len == -1 && !found_nul) |
| { |
| char *peekbuf; |
| |
| /* We didn't find a null terminator we were looking for. Attempt |
| to peek at the next character. If not successful, or it is not |
| a null byte, then force ellipsis to be printed. */ |
| |
| peekbuf = (char *) alloca (width); |
| |
| if (target_read_memory (addr, peekbuf, width) == 0 |
| && extract_unsigned_integer (peekbuf, width) != 0) |
| force_ellipsis = 1; |
| } |
| else if ((len >= 0 && errcode != 0) || (len > (bufptr - buffer) / width)) |
| { |
| /* Getting an error when we have a requested length, or fetching less |
| than the number of characters actually requested, always make us |
| print ellipsis. */ |
| force_ellipsis = 1; |
| } |
| |
| QUIT; |
| |
| /* If we get an error before fetching anything, don't print a string. |
| But if we fetch something and then get an error, print the string |
| and then the error message. */ |
| if (errcode == 0 || bufptr > buffer) |
| { |
| if (addressprint) |
| { |
| fputs_filtered (" ", stream); |
| } |
| LA_PRINT_STRING (stream, buffer, (bufptr - buffer) / width, width, force_ellipsis); |
| } |
| |
| if (errcode != 0) |
| { |
| if (errcode == EIO) |
| { |
| fprintf_filtered (stream, " <Address "); |
| print_address_numeric (addr, 1, stream); |
| fprintf_filtered (stream, " out of bounds>"); |
| } |
| else |
| { |
| fprintf_filtered (stream, " <Error reading address "); |
| print_address_numeric (addr, 1, stream); |
| fprintf_filtered (stream, ": %s>", safe_strerror (errcode)); |
| } |
| } |
| gdb_flush (stream); |
| do_cleanups (old_chain); |
| return ((bufptr - buffer) / width); |
| } |
| |
| |
| /* Validate an input or output radix setting, and make sure the user |
| knows what they really did here. Radix setting is confusing, e.g. |
| setting the input radix to "10" never changes it! */ |
| |
| /* ARGSUSED */ |
| static void |
| set_input_radix (char *args, int from_tty, struct cmd_list_element *c) |
| { |
| set_input_radix_1 (from_tty, input_radix); |
| } |
| |
| /* ARGSUSED */ |
| static void |
| set_input_radix_1 (int from_tty, unsigned radix) |
| { |
| /* We don't currently disallow any input radix except 0 or 1, which don't |
| make any mathematical sense. In theory, we can deal with any input |
| radix greater than 1, even if we don't have unique digits for every |
| value from 0 to radix-1, but in practice we lose on large radix values. |
| We should either fix the lossage or restrict the radix range more. |
| (FIXME). */ |
| |
| if (radix < 2) |
| { |
| /* FIXME: cagney/2002-03-17: This needs to revert the bad radix |
| value. */ |
| error ("Nonsense input radix ``decimal %u''; input radix unchanged.", |
| radix); |
| } |
| input_radix = radix; |
| if (from_tty) |
| { |
| printf_filtered ("Input radix now set to decimal %u, hex %x, octal %o.\n", |
| radix, radix, radix); |
| } |
| } |
| |
| /* ARGSUSED */ |
| static void |
| set_output_radix (char *args, int from_tty, struct cmd_list_element *c) |
| { |
| set_output_radix_1 (from_tty, output_radix); |
| } |
| |
| static void |
| set_output_radix_1 (int from_tty, unsigned radix) |
| { |
| /* Validate the radix and disallow ones that we aren't prepared to |
| handle correctly, leaving the radix unchanged. */ |
| switch (radix) |
| { |
| case 16: |
| output_format = 'x'; /* hex */ |
| break; |
| case 10: |
| output_format = 0; /* decimal */ |
| break; |
| case 8: |
| output_format = 'o'; /* octal */ |
| break; |
| default: |
| /* FIXME: cagney/2002-03-17: This needs to revert the bad radix |
| value. */ |
| error ("Unsupported output radix ``decimal %u''; output radix unchanged.", |
| radix); |
| } |
| output_radix = radix; |
| if (from_tty) |
| { |
| printf_filtered ("Output radix now set to decimal %u, hex %x, octal %o.\n", |
| radix, radix, radix); |
| } |
| } |
| |
| /* Set both the input and output radix at once. Try to set the output radix |
| first, since it has the most restrictive range. An radix that is valid as |
| an output radix is also valid as an input radix. |
| |
| It may be useful to have an unusual input radix. If the user wishes to |
| set an input radix that is not valid as an output radix, he needs to use |
| the 'set input-radix' command. */ |
| |
| static void |
| set_radix (char *arg, int from_tty) |
| { |
| unsigned radix; |
| |
| radix = (arg == NULL) ? 10 : parse_and_eval_long (arg); |
| set_output_radix_1 (0, radix); |
| set_input_radix_1 (0, radix); |
| if (from_tty) |
| { |
| printf_filtered ("Input and output radices now set to decimal %u, hex %x, octal %o.\n", |
| radix, radix, radix); |
| } |
| } |
| |
| /* Show both the input and output radices. */ |
| |
| /*ARGSUSED */ |
| static void |
| show_radix (char *arg, int from_tty) |
| { |
| if (from_tty) |
| { |
| if (input_radix == output_radix) |
| { |
| printf_filtered ("Input and output radices set to decimal %u, hex %x, octal %o.\n", |
| input_radix, input_radix, input_radix); |
| } |
| else |
| { |
| printf_filtered ("Input radix set to decimal %u, hex %x, octal %o.\n", |
| input_radix, input_radix, input_radix); |
| printf_filtered ("Output radix set to decimal %u, hex %x, octal %o.\n", |
| output_radix, output_radix, output_radix); |
| } |
| } |
| } |
| |
| |
| /*ARGSUSED */ |
| static void |
| set_print (char *arg, int from_tty) |
| { |
| printf_unfiltered ( |
| "\"set print\" must be followed by the name of a print subcommand.\n"); |
| help_list (setprintlist, "set print ", -1, gdb_stdout); |
| } |
| |
| /*ARGSUSED */ |
| static void |
| show_print (char *args, int from_tty) |
| { |
| cmd_show_list (showprintlist, from_tty, ""); |
| } |
| |
| void |
| _initialize_valprint (void) |
| { |
| struct cmd_list_element *c; |
| |
| add_prefix_cmd ("print", no_class, set_print, |
| "Generic command for setting how things print.", |
| &setprintlist, "set print ", 0, &setlist); |
| add_alias_cmd ("p", "print", no_class, 1, &setlist); |
| /* prefer set print to set prompt */ |
| add_alias_cmd ("pr", "print", no_class, 1, &setlist); |
| |
| add_prefix_cmd ("print", no_class, show_print, |
| "Generic command for showing print settings.", |
| &showprintlist, "show print ", 0, &showlist); |
| add_alias_cmd ("p", "print", no_class, 1, &showlist); |
| add_alias_cmd ("pr", "print", no_class, 1, &showlist); |
| |
| add_show_from_set |
| (add_set_cmd ("elements", no_class, var_uinteger, (char *) &print_max, |
| "Set limit on string chars or array elements to print.\n\ |
| \"set print elements 0\" causes there to be no limit.", |
| &setprintlist), |
| &showprintlist); |
| |
| add_show_from_set |
| (add_set_cmd ("null-stop", no_class, var_boolean, |
| (char *) &stop_print_at_null, |
| "Set printing of char arrays to stop at first null char.", |
| &setprintlist), |
| &showprintlist); |
| |
| add_show_from_set |
| (add_set_cmd ("repeats", no_class, var_uinteger, |
| (char *) &repeat_count_threshold, |
| "Set threshold for repeated print elements.\n\ |
| \"set print repeats 0\" causes all elements to be individually printed.", |
| &setprintlist), |
| &showprintlist); |
| |
| add_show_from_set |
| (add_set_cmd ("pretty", class_support, var_boolean, |
| (char *) &prettyprint_structs, |
| "Set prettyprinting of structures.", |
| &setprintlist), |
| &showprintlist); |
| |
| add_show_from_set |
| (add_set_cmd ("union", class_support, var_boolean, (char *) &unionprint, |
| "Set printing of unions interior to structures.", |
| &setprintlist), |
| &showprintlist); |
| |
| add_show_from_set |
| (add_set_cmd ("array", class_support, var_boolean, |
| (char *) &prettyprint_arrays, |
| "Set prettyprinting of arrays.", |
| &setprintlist), |
| &showprintlist); |
| |
| add_show_from_set |
| (add_set_cmd ("address", class_support, var_boolean, (char *) &addressprint, |
| "Set printing of addresses.", |
| &setprintlist), |
| &showprintlist); |
| |
| c = add_set_cmd ("input-radix", class_support, var_uinteger, |
| (char *) &input_radix, |
| "Set default input radix for entering numbers.", |
| &setlist); |
| add_show_from_set (c, &showlist); |
| set_cmd_sfunc (c, set_input_radix); |
| |
| c = add_set_cmd ("output-radix", class_support, var_uinteger, |
| (char *) &output_radix, |
| "Set default output radix for printing of values.", |
| &setlist); |
| add_show_from_set (c, &showlist); |
| set_cmd_sfunc (c, set_output_radix); |
| |
| /* The "set radix" and "show radix" commands are special in that they are |
| like normal set and show commands but allow two normally independent |
| variables to be either set or shown with a single command. So the |
| usual add_set_cmd() and add_show_from_set() commands aren't really |
| appropriate. */ |
| add_cmd ("radix", class_support, set_radix, |
| "Set default input and output number radices.\n\ |
| Use 'set input-radix' or 'set output-radix' to independently set each.\n\ |
| Without an argument, sets both radices back to the default value of 10.", |
| &setlist); |
| add_cmd ("radix", class_support, show_radix, |
| "Show the default input and output number radices.\n\ |
| Use 'show input-radix' or 'show output-radix' to independently show each.", |
| &showlist); |
| |
| /* Give people the defaults which they are used to. */ |
| prettyprint_structs = 0; |
| prettyprint_arrays = 0; |
| unionprint = 1; |
| addressprint = 1; |
| print_max = PRINT_MAX_DEFAULT; |
| } |