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Diffstat (limited to 'gdb/printcmd.c')
| -rw-r--r-- | gdb/printcmd.c | 2575 |
1 files changed, 2575 insertions, 0 deletions
diff --git a/gdb/printcmd.c b/gdb/printcmd.c new file mode 100644 index 00000000000..0f0b8abd202 --- /dev/null +++ b/gdb/printcmd.c @@ -0,0 +1,2575 @@ +/* Print values for GNU debugger GDB. + Copyright 1986, 87, 88, 89, 90, 91, 93, 94, 95, 1998 + 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 "frame.h" +#include "symtab.h" +#include "gdbtypes.h" +#include "value.h" +#include "language.h" +#include "expression.h" +#include "gdbcore.h" +#include "gdbcmd.h" +#include "target.h" +#include "breakpoint.h" +#include "demangle.h" +#include "valprint.h" +#include "annotate.h" +#include "symfile.h" /* for overlay functions */ +#include "objfiles.h" /* ditto */ + +extern int asm_demangle; /* Whether to demangle syms in asm printouts */ +extern int addressprint; /* Whether to print hex addresses in HLL " */ + +struct format_data +{ + int count; + char format; + char size; +}; + +/* 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; + +/* Default section to examine next. */ + +static asection *next_section; + +/* 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_ptr last_examine_value; + +/* Largest offset between a symbolic value and an address, that will be + printed as `0x1234 <symbol+offset>'. */ + +static unsigned int max_symbolic_offset = UINT_MAX; + +/* Append the source filename and linenumber of the symbol when + printing a symbolic value as `<symbol at filename:linenum>' if set. */ +static int print_symbol_filename = 0; + +/* Number of auto-display expression currently being displayed. + So that we can disable it if we get an error or a signal within it. + -1 when not doing one. */ + +int current_display_number; + +/* Flag to low-level print routines that this value is being printed + in an epoch window. We'd like to pass this as a parameter, but + every routine would need to take it. Perhaps we can encapsulate + this in the I/O stream once we have GNU stdio. */ + +int inspect_it = 0; + +struct display +{ + /* Chain link to next auto-display item. */ + struct display *next; + /* Expression to be evaluated and displayed. */ + struct expression *exp; + /* Item number of this auto-display item. */ + int number; + /* Display format specified. */ + struct format_data format; + /* Innermost block required by this expression when evaluated */ + struct block *block; + /* Status of this display (enabled or disabled) */ + enum enable status; +}; + +/* Chain of expressions whose values should be displayed + automatically each time the program stops. */ + +static struct display *display_chain; + +static int display_number; + +/* Prototypes for exported functions. */ + +void output_command PARAMS ((char *, int)); + +void _initialize_printcmd PARAMS ((void)); + +/* Prototypes for local functions. */ + +static void delete_display PARAMS ((int)); + +static void enable_display PARAMS ((char *, int)); + +static void disable_display_command PARAMS ((char *, int)); + +static void disassemble_command PARAMS ((char *, int)); + +static void printf_command PARAMS ((char *, int)); + +static void print_frame_nameless_args PARAMS ((struct frame_info *, long, + int, int, GDB_FILE *)); + +static void display_info PARAMS ((char *, int)); + +static void do_one_display PARAMS ((struct display *)); + +static void undisplay_command PARAMS ((char *, int)); + +static void free_display PARAMS ((struct display *)); + +static void display_command PARAMS ((char *, int)); + +void x_command PARAMS ((char *, int)); + +static void address_info PARAMS ((char *, int)); + +static void set_command PARAMS ((char *, int)); + +static void call_command PARAMS ((char *, int)); + +static void inspect_command PARAMS ((char *, int)); + +static void print_command PARAMS ((char *, int)); + +static void print_command_1 PARAMS ((char *, int, int)); + +static void validate_format PARAMS ((struct format_data, char *)); + +static void do_examine PARAMS ((struct format_data, CORE_ADDR addr, asection *section)); + +static void print_formatted PARAMS ((value_ptr, int, int)); + +static struct format_data decode_format PARAMS ((char **, int, int)); + +static int print_insn PARAMS ((CORE_ADDR, GDB_FILE *)); + +static void sym_info PARAMS ((char *, int)); + + +/* 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 + user. + 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. */ + +static struct format_data +decode_format (string_ptr, oformat, osize) + char **string_ptr; + int oformat; + int osize; +{ + struct format_data val; + register char *p = *string_ptr; + + val.format = '?'; + val.size = '?'; + val.count = 1; + + if (*p >= '0' && *p <= '9') + val.count = atoi (p); + while (*p >= '0' && *p <= '9') p++; + + /* Now process size or format letters that follow. */ + + while (1) + { + if (*p == 'b' || *p == 'h' || *p == 'w' || *p == 'g') + val.size = *p++; + else if (*p >= 'a' && *p <= 'z') + val.format = *p++; + else + break; + } + + while (*p == ' ' || *p == '\t') p++; + *string_ptr = p; + + /* Set defaults for format and size if not specified. */ + if (val.format == '?') + { + if (val.size == '?') + { + /* Neither has been specified. */ + val.format = oformat; + val.size = osize; + } + else + /* If a size is specified, any format makes a reasonable + default except 'i'. */ + val.format = oformat == 'i' ? 'x' : oformat; + } + else if (val.size == '?') + switch (val.format) + { + case 'a': + case 's': + /* Pick the appropriate size for an address. */ + if (TARGET_PTR_BIT == 64) + val.size = osize ? 'g' : osize; + else if (TARGET_PTR_BIT == 32) + val.size = osize ? 'w' : osize; + else if (TARGET_PTR_BIT == 16) + val.size = osize ? 'h' : osize; + else + /* Bad value for TARGET_PTR_BIT */ + abort (); + break; + case 'f': + /* Floating point has to be word or giantword. */ + if (osize == 'w' || osize == 'g') + val.size = osize; + else + /* Default it to giantword if the last used size is not + appropriate. */ + val.size = osize ? 'g' : osize; + break; + case 'c': + /* Characters default to one byte. */ + val.size = osize ? 'b' : osize; + break; + default: + /* The default is the size most recently specified. */ + val.size = osize; + } + + return val; +} + +/* Print value VAL on gdb_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. */ + +static void +print_formatted (val, format, size) + register value_ptr val; + register int format; + int size; +{ + struct type *type = check_typedef (VALUE_TYPE (val)); + int len = TYPE_LENGTH (type); + + if (VALUE_LVAL (val) == lval_memory) + { + next_address = VALUE_ADDRESS (val) + len; + next_section = VALUE_BFD_SECTION (val); + } + + switch (format) + { + case 's': + /* FIXME: Need to handle wchar_t's here... */ + next_address = VALUE_ADDRESS (val) + + val_print_string (VALUE_ADDRESS (val), -1, 1, gdb_stdout); + next_section = VALUE_BFD_SECTION (val); + break; + + case 'i': + /* The old comment says + "Force output out, print_insn not using _filtered". + I'm not completely sure what that means, I suspect most print_insn + now do use _filtered, so I guess it's obsolete. + --Yes, it does filter now, and so this is obsolete. -JB */ + + /* We often wrap here if there are long symbolic names. */ + wrap_here (" "); + next_address = VALUE_ADDRESS (val) + + print_insn (VALUE_ADDRESS (val), gdb_stdout); + next_section = VALUE_BFD_SECTION (val); + break; + + default: + if (format == 0 + || TYPE_CODE (type) == TYPE_CODE_ARRAY + || TYPE_CODE (type) == TYPE_CODE_STRING + || TYPE_CODE (type) == TYPE_CODE_STRUCT + || TYPE_CODE (type) == TYPE_CODE_UNION) + /* If format is 0, use the 'natural' format for + * that type of value. If the type is non-scalar, + * we have to use language rules to print it as + * a series of scalars. + */ + value_print (val, gdb_stdout, format, Val_pretty_default); + else + /* User specified format, so don't look to the + * the type to tell us what to do. + */ + print_scalar_formatted (VALUE_CONTENTS (val), type, + format, size, gdb_stdout); + } +} + +/* 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 + with a format. */ + +void +print_scalar_formatted (valaddr, type, format, size, stream) + char *valaddr; + struct type *type; + int format; + int size; + GDB_FILE *stream; +{ + LONGEST val_long; + unsigned int len = TYPE_LENGTH (type); + + if (len > sizeof (LONGEST) + && (format == 't' + || format == 'c' + || format == 'o' + || format == 'u' + || format == 'd' + || format == 'x')) + { + if (! TYPE_UNSIGNED (type) + || ! extract_long_unsigned_integer (valaddr, len, &val_long)) + { + /* We can't print it normally, but we can print it in hex. + Printing it in the wrong radix is more useful than saying + "use /x, you dummy". */ + /* FIXME: we could also do octal or binary if that was the + desired format. */ + /* FIXME: we should be using the size field to give us a + minimum field width to print. */ + + if( format == 'o' ) + print_octal_chars (stream, valaddr, len); + else if( format == 'd' ) + print_decimal_chars (stream, valaddr, len ); + else if( format == 't' ) + print_binary_chars (stream, valaddr, len); + else + + /* replace with call to print_hex_chars? Looks + like val_print_type_code_int is redoing + work. - edie */ + + val_print_type_code_int (type, valaddr, stream); + + return; + } + + /* If we get here, extract_long_unsigned_integer set val_long. */ + } + else if (format != 'f') + val_long = unpack_long (type, valaddr); + + /* If we are printing it as unsigned, truncate it in case it is actually + a negative signed value (e.g. "print/u (short)-1" should print 65535 + (if shorts are 16 bits) instead of 4294967295). */ + if (format != 'd') + { + if (len < sizeof (LONGEST)) + val_long &= ((LONGEST) 1 << HOST_CHAR_BIT * len) - 1; + } + + switch (format) + { + case 'x': + if (!size) + { + /* no size specified, like in print. Print varying # of digits. */ + print_longest (stream, 'x', 1, val_long); + } + else + switch (size) + { + case 'b': + case 'h': + case 'w': + case 'g': + print_longest (stream, size, 1, val_long); + break; + default: + error ("Undefined output size \"%c\".", size); + } + break; + + case 'd': + print_longest (stream, 'd', 1, val_long); + break; + + case 'u': + print_longest (stream, 'u', 0, val_long); + break; + + case 'o': + if (val_long) + print_longest (stream, 'o', 1, val_long); + else + fprintf_filtered (stream, "0"); + break; + + case 'a': + print_address (unpack_pointer (type, valaddr), stream); + break; + + case 'c': + value_print (value_from_longest (builtin_type_char, val_long), stream, 0, + Val_pretty_default); + break; + + case 'f': + if (len == sizeof (float)) + type = builtin_type_float; + else if (len == sizeof (double)) + type = builtin_type_double; + print_floating (valaddr, type, stream); + break; + + case 0: + abort (); + + case 't': + /* Binary; 't' stands for "two". */ + { + char bits[8*(sizeof val_long) + 1]; + char buf[8*(sizeof val_long) + 32]; + char *cp = bits; + int width; + + if (!size) + width = 8*(sizeof val_long); + else + switch (size) + { + case 'b': + width = 8; + break; + case 'h': + width = 16; + break; + case 'w': + width = 32; + break; + case 'g': + width = 64; + break; + default: + error ("Undefined output size \"%c\".", size); + } + + bits[width] = '\0'; + while (width-- > 0) + { + bits[width] = (val_long & 1) ? '1' : '0'; + val_long >>= 1; + } + if (!size) + { + while (*cp && *cp == '0') + cp++; + if (*cp == '\0') + cp--; + } + strcpy (buf, local_binary_format_prefix()); + strcat (buf, cp); + strcat (buf, local_binary_format_suffix()); + fprintf_filtered (stream, buf); + } + break; + + default: + error ("Undefined output format \"%c\".", format); + } +} + +/* Specify default address for `x' command. + `info lines' uses this. */ + +void +set_next_address (addr) + CORE_ADDR addr; +{ + next_address = addr; + + /* Make address available to the user as $_. */ + set_internalvar (lookup_internalvar ("_"), + value_from_longest (lookup_pointer_type (builtin_type_void), + (LONGEST) addr)); +} + +/* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM, + after LEADIN. Print nothing if no symbolic name is found nearby. + Optionally also print source file and line number, if available. + DO_DEMANGLE controls whether to print a symbol in its native "raw" form, + or to interpret it as a possible C++ name and convert it back to source + form. However note that DO_DEMANGLE can be overridden by the specific + settings of the demangle and asm_demangle variables. */ + +void +print_address_symbolic (addr, stream, do_demangle, leadin) + CORE_ADDR addr; + GDB_FILE *stream; + int do_demangle; + char *leadin; +{ + struct minimal_symbol *msymbol; + struct symbol *symbol; + struct symtab *symtab = 0; + CORE_ADDR name_location = 0; + char *name = ""; + asection *section = 0; + int unmapped = 0; + + /* Determine if the address is in an overlay, and whether it is mapped. */ + if (overlay_debugging) + { + section = find_pc_overlay (addr); + if (pc_in_unmapped_range (addr, section)) + { + unmapped = 1; + addr = overlay_mapped_address (addr, section); + } + } + + /* On some targets, add in extra "flag" bits to PC for + disassembly. This should ensure that "rounding errors" in + symbol addresses that are masked for disassembly favour the + the correct symbol. */ + +#ifdef GDB_TARGET_UNMASK_DISAS_PC + addr = GDB_TARGET_UNMASK_DISAS_PC (addr); +#endif + + /* First try to find the address in the symbol table, then + in the minsyms. Take the closest one. */ + + /* This is defective in the sense that it only finds text symbols. So + really this is kind of pointless--we should make sure that the + minimal symbols have everything we need (by changing that we could + save some memory, but for many debug format--ELF/DWARF or + anything/stabs--it would be inconvenient to eliminate those minimal + symbols anyway). */ + msymbol = lookup_minimal_symbol_by_pc_section (addr, section); + symbol = find_pc_sect_function (addr, section); + + if (symbol) + { + name_location = BLOCK_START (SYMBOL_BLOCK_VALUE (symbol)); + if (do_demangle) + name = SYMBOL_SOURCE_NAME (symbol); + else + name = SYMBOL_LINKAGE_NAME (symbol); + } + + if (msymbol != NULL) + { + if (SYMBOL_VALUE_ADDRESS (msymbol) > name_location || symbol == NULL) + { + /* The msymbol is closer to the address than the symbol; + use the msymbol instead. */ + symbol = 0; + symtab = 0; + name_location = SYMBOL_VALUE_ADDRESS (msymbol); + if (do_demangle) + name = SYMBOL_SOURCE_NAME (msymbol); + else + name = SYMBOL_LINKAGE_NAME (msymbol); + } + } + if (symbol == NULL && msymbol == NULL) + return; + + /* On some targets, mask out extra "flag" bits from PC for handsome + disassembly. */ + +#ifdef GDB_TARGET_MASK_DISAS_PC + name_location = GDB_TARGET_MASK_DISAS_PC (name_location); + addr = GDB_TARGET_MASK_DISAS_PC (addr); +#endif + + /* If the nearest symbol is too far away, don't print anything symbolic. */ + + /* For when CORE_ADDR is larger than unsigned int, we do math in + CORE_ADDR. But when we detect unsigned wraparound in the + CORE_ADDR math, we ignore this test and print the offset, + because addr+max_symbolic_offset has wrapped through the end + of the address space back to the beginning, giving bogus comparison. */ + if (addr > name_location + max_symbolic_offset + && name_location + max_symbolic_offset > name_location) + return; + + fputs_filtered (leadin, stream); + if (unmapped) + fputs_filtered ("<*", stream); + else + fputs_filtered ("<", stream); + fputs_filtered (name, stream); + if (addr != name_location) + fprintf_filtered (stream, "+%u", (unsigned int)(addr - name_location)); + + /* Append source filename and line number if desired. Give specific + line # of this addr, if we have it; else line # of the nearest symbol. */ + if (print_symbol_filename) + { + struct symtab_and_line sal; + + sal = find_pc_sect_line (addr, section, 0); + + if (sal.symtab) + fprintf_filtered (stream, " at %s:%d", sal.symtab->filename, sal.line); + else if (symtab && symbol && symbol->line) + fprintf_filtered (stream, " at %s:%d", symtab->filename, symbol->line); + else if (symtab) + fprintf_filtered (stream, " in %s", symtab->filename); + } + if (unmapped) + fputs_filtered ("*>", stream); + else + fputs_filtered (">", stream); +} + + +/* Print address ADDR on STREAM. USE_LOCAL means the same thing as for + print_longest. */ +void +print_address_numeric (addr, use_local, stream) + CORE_ADDR addr; + int use_local; + GDB_FILE *stream; +{ + /* This assumes a CORE_ADDR can fit in a LONGEST. Probably a safe + assumption. */ + print_longest (stream, 'x', use_local, (ULONGEST) addr); +} + +/* Print address ADDR symbolically on STREAM. + First print it as a number. Then perhaps print + <SYMBOL + OFFSET> after the number. */ + +void +print_address (addr, stream) + CORE_ADDR addr; + GDB_FILE *stream; +{ + print_address_numeric (addr, 1, stream); + print_address_symbolic (addr, stream, asm_demangle, " "); +} + +/* Print address ADDR symbolically on STREAM. Parameter DEMANGLE + controls whether to print the symbolic name "raw" or demangled. + Global setting "addressprint" controls whether to print hex address + or not. */ + +void +print_address_demangle (addr, stream, do_demangle) + CORE_ADDR addr; + GDB_FILE *stream; + int do_demangle; +{ + if (addr == 0) + { + fprintf_filtered (stream, "0"); + } + else if (addressprint) + { + print_address_numeric (addr, 1, stream); + print_address_symbolic (addr, stream, do_demangle, " "); + } + else + { + print_address_symbolic (addr, stream, do_demangle, ""); + } +} + + +/* These are the types that $__ will get after an examine command of one + of these sizes. */ + +static struct type *examine_i_type; + +static struct type *examine_b_type; +static struct type *examine_h_type; +static struct type *examine_w_type; +static struct type *examine_g_type; + +/* Examine data at address ADDR in format FMT. + Fetch it from memory and print on gdb_stdout. */ + +static void +do_examine (fmt, addr, sect) + struct format_data fmt; + CORE_ADDR addr; + asection *sect; +{ + register char format = 0; + register char size; + register int count = 1; + struct type *val_type = NULL; + register int i; + register int maxelts; + + format = fmt.format; + size = fmt.size; + count = fmt.count; + next_address = addr; + next_section = sect; + + /* String or instruction format implies fetch single bytes + regardless of the specified size. */ + if (format == 's' || format == 'i') + size = 'b'; + + if (format == 'i') + val_type = examine_i_type; + else if (size == 'b') + val_type = examine_b_type; + else if (size == 'h') + val_type = examine_h_type; + else if (size == 'w') + val_type = examine_w_type; + else if (size == 'g') + val_type = examine_g_type; + + maxelts = 8; + if (size == 'w') + maxelts = 4; + if (size == 'g') + maxelts = 2; + if (format == 's' || format == 'i') + maxelts = 1; + + /* 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. */ + + while (count > 0) + { + QUIT; + print_address (next_address, gdb_stdout); + printf_filtered (":"); + for (i = maxelts; + i > 0 && count > 0; + i--, count--) + { + printf_filtered ("\t"); + /* Note that print_formatted sets next_address for the next + object. */ + last_examine_address = next_address; + + if (last_examine_value) + value_free (last_examine_value); + + /* The value to be displayed is not fetched greedily. + Instead, to avoid the posibility of a fetched value not + being used, its retreval is delayed until the print code + uses it. When examining an instruction stream, the + disassembler will perform its own memory fetch using just + the address stored in LAST_EXAMINE_VALUE. FIXME: Should + the disassembler be modified so that LAST_EXAMINE_VALUE + is left with the byte sequence from the last complete + instruction fetched from memory? */ + last_examine_value = value_at_lazy (val_type, next_address, sect); + + if (last_examine_value) + release_value (last_examine_value); + + print_formatted (last_examine_value, format, size); + } + printf_filtered ("\n"); + gdb_flush (gdb_stdout); + } +} + +static void +validate_format (fmt, cmdname) + struct format_data fmt; + char *cmdname; +{ + if (fmt.size != 0) + error ("Size letters are meaningless in \"%s\" command.", cmdname); + if (fmt.count != 1) + error ("Item count other than 1 is meaningless in \"%s\" command.", + cmdname); + if (fmt.format == 'i' || fmt.format == 's') + error ("Format letter \"%c\" is meaningless in \"%s\" command.", + fmt.format, cmdname); +} + +/* Evaluate string EXP as an expression in the current language and + print the resulting value. EXP may contain a format specifier as the + first argument ("/x myvar" for example, to print myvar in hex). + */ + +static void +print_command_1 (exp, inspect, voidprint) + char *exp; + int inspect; + int voidprint; +{ + struct expression *expr; + register struct cleanup *old_chain = 0; + register char format = 0; + register value_ptr val; + struct format_data fmt; + int cleanup = 0; + + /* Pass inspect flag to the rest of the print routines in a global (sigh). */ + inspect_it = inspect; + + if (exp && *exp == '/') + { + exp++; + fmt = decode_format (&exp, last_format, 0); + validate_format (fmt, "print"); + last_format = format = fmt.format; + } + else + { + fmt.count = 1; + fmt.format = 0; + fmt.size = 0; + } + + if (exp && *exp) + { + extern int objectprint; + struct type *type; + expr = parse_expression (exp); + old_chain = make_cleanup ((make_cleanup_func) free_current_contents, + &expr); + cleanup = 1; + val = evaluate_expression (expr); + + /* C++: figure out what type we actually want to print it as. */ + type = VALUE_TYPE (val); + + if (objectprint + && ( TYPE_CODE (type) == TYPE_CODE_PTR + || TYPE_CODE (type) == TYPE_CODE_REF) + && ( TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRUCT + || TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_UNION)) + { + value_ptr v; + + v = value_from_vtable_info (val, TYPE_TARGET_TYPE (type)); + if (v != 0) + { + val = v; + type = VALUE_TYPE (val); + } + } + } + else + val = access_value_history (0); + + if (voidprint || (val && VALUE_TYPE (val) && + TYPE_CODE (VALUE_TYPE (val)) != TYPE_CODE_VOID)) + { + int histindex = record_latest_value (val); + + if (histindex >= 0) + annotate_value_history_begin (histindex, VALUE_TYPE (val)); + else + annotate_value_begin (VALUE_TYPE (val)); + + if (inspect) + printf_unfiltered ("\031(gdb-makebuffer \"%s\" %d '(\"", exp, histindex); + else + if (histindex >= 0) printf_filtered ("$%d = ", histindex); + + if (histindex >= 0) + annotate_value_history_value (); + + print_formatted (val, format, fmt.size); + printf_filtered ("\n"); + + if (histindex >= 0) + annotate_value_history_end (); + else + annotate_value_end (); + + if (inspect) + printf_unfiltered("\") )\030"); + } + + if (cleanup) + do_cleanups (old_chain); + inspect_it = 0; /* Reset print routines to normal */ +} + +/* ARGSUSED */ +static void +print_command (exp, from_tty) + char *exp; + int from_tty; +{ + print_command_1 (exp, 0, 1); +} + +/* Same as print, except in epoch, it gets its own window */ +/* ARGSUSED */ +static void +inspect_command (exp, from_tty) + char *exp; + int from_tty; +{ + extern int epoch_interface; + + print_command_1 (exp, epoch_interface, 1); +} + +/* Same as print, except it doesn't print void results. */ +/* ARGSUSED */ +static void +call_command (exp, from_tty) + char *exp; + int from_tty; +{ + print_command_1 (exp, 0, 0); +} + +/* ARGSUSED */ +void +output_command (exp, from_tty) + char *exp; + int from_tty; +{ + struct expression *expr; + register struct cleanup *old_chain; + register char format = 0; + register value_ptr val; + struct format_data fmt; + + if (exp && *exp == '/') + { + exp++; + fmt = decode_format (&exp, 0, 0); + validate_format (fmt, "output"); + format = fmt.format; + } + + expr = parse_expression (exp); + old_chain = make_cleanup ((make_cleanup_func) free_current_contents, &expr); + + val = evaluate_expression (expr); + + annotate_value_begin (VALUE_TYPE (val)); + + print_formatted (val, format, fmt.size); + + annotate_value_end (); + + do_cleanups (old_chain); +} + +/* ARGSUSED */ +static void +set_command (exp, from_tty) + char *exp; + int from_tty; +{ + struct expression *expr = parse_expression (exp); + register struct cleanup *old_chain + = make_cleanup ((make_cleanup_func) free_current_contents, &expr); + evaluate_expression (expr); + do_cleanups (old_chain); +} + +/* ARGSUSED */ +static void +sym_info (arg, from_tty) + char *arg; + int from_tty; +{ + struct minimal_symbol *msymbol; + struct objfile *objfile; + struct obj_section *osect; + asection *sect; + CORE_ADDR addr, sect_addr; + int matches = 0; + unsigned int offset; + + if (!arg) + error_no_arg ("address"); + + addr = parse_and_eval_address (arg); + ALL_OBJSECTIONS (objfile, osect) + { + sect = osect->the_bfd_section; + sect_addr = overlay_mapped_address (addr, sect); + + if (osect->addr <= sect_addr && sect_addr < osect->endaddr && + (msymbol = lookup_minimal_symbol_by_pc_section (sect_addr, sect))) + { + matches = 1; + offset = sect_addr - SYMBOL_VALUE_ADDRESS (msymbol); + if (offset) + printf_filtered ("%s + %u in ", + SYMBOL_SOURCE_NAME (msymbol), offset); + else + printf_filtered ("%s in ", + SYMBOL_SOURCE_NAME (msymbol)); + if (pc_in_unmapped_range (addr, sect)) + printf_filtered ("load address range of "); + if (section_is_overlay (sect)) + printf_filtered ("%s overlay ", + section_is_mapped (sect) ? "mapped" : "unmapped"); + printf_filtered ("section %s", sect->name); + printf_filtered ("\n"); + } + } + if (matches == 0) + printf_filtered ("No symbol matches %s.\n", arg); +} + +/* ARGSUSED */ +static void +address_info (exp, from_tty) + char *exp; + int from_tty; +{ + register struct symbol *sym; + register struct minimal_symbol *msymbol; + register long val; + register long basereg; + asection *section; + CORE_ADDR load_addr; + int is_a_field_of_this; /* C++: lookup_symbol sets this to nonzero + if exp is a field of `this'. */ + + if (exp == 0) + error ("Argument required."); + + sym = lookup_symbol (exp, get_selected_block (), VAR_NAMESPACE, + &is_a_field_of_this, (struct symtab **)NULL); + if (sym == NULL) + { + if (is_a_field_of_this) + { + printf_filtered ("Symbol \""); + fprintf_symbol_filtered (gdb_stdout, exp, + current_language->la_language, DMGL_ANSI); + printf_filtered ("\" is a field of the local class variable `this'\n"); + return; + } + + msymbol = lookup_minimal_symbol (exp, NULL, NULL); + + if (msymbol != NULL) + { + load_addr = SYMBOL_VALUE_ADDRESS (msymbol); + + printf_filtered ("Symbol \""); + fprintf_symbol_filtered (gdb_stdout, exp, + current_language->la_language, DMGL_ANSI); + printf_filtered ("\" is at "); + print_address_numeric (load_addr, 1, gdb_stdout); + printf_filtered (" in a file compiled without debugging"); + section = SYMBOL_BFD_SECTION (msymbol); + if (section_is_overlay (section)) + { + load_addr = overlay_unmapped_address (load_addr, section); + printf_filtered (",\n -- loaded at "); + print_address_numeric (load_addr, 1, gdb_stdout); + printf_filtered (" in overlay section %s", section->name); + } + printf_filtered (".\n"); + } + else + error ("No symbol \"%s\" in current context.", exp); + return; + } + + printf_filtered ("Symbol \""); + fprintf_symbol_filtered (gdb_stdout, SYMBOL_NAME (sym), + current_language->la_language, DMGL_ANSI); + printf_filtered ("\" is "); + val = SYMBOL_VALUE (sym); + basereg = SYMBOL_BASEREG (sym); + section = SYMBOL_BFD_SECTION (sym); + + switch (SYMBOL_CLASS (sym)) + { + case LOC_CONST: + case LOC_CONST_BYTES: + printf_filtered ("constant"); + break; + + case LOC_LABEL: + printf_filtered ("a label at address "); + print_address_numeric (load_addr = SYMBOL_VALUE_ADDRESS (sym), + 1, gdb_stdout); + if (section_is_overlay (section)) + { + load_addr = overlay_unmapped_address (load_addr, section); + printf_filtered (",\n -- loaded at "); + print_address_numeric (load_addr, 1, gdb_stdout); + printf_filtered (" in overlay section %s", section->name); + } + break; + + case LOC_REGISTER: + printf_filtered ("a variable in register %s", REGISTER_NAME (val)); + break; + + case LOC_STATIC: + printf_filtered ("static storage at address "); + print_address_numeric (load_addr = SYMBOL_VALUE_ADDRESS (sym), + 1, gdb_stdout); + if (section_is_overlay (section)) + { + load_addr = overlay_unmapped_address (load_addr, section); + printf_filtered (",\n -- loaded at "); + print_address_numeric (load_addr, 1, gdb_stdout); + printf_filtered (" in overlay section %s", section->name); + } + break; + + case LOC_INDIRECT: + printf_filtered ("external global (indirect addressing), at address *("); + print_address_numeric (load_addr = SYMBOL_VALUE_ADDRESS (sym), + 1, gdb_stdout); + printf_filtered (")"); + if (section_is_overlay (section)) + { + load_addr = overlay_unmapped_address (load_addr, section); + printf_filtered (",\n -- loaded at "); + print_address_numeric (load_addr, 1, gdb_stdout); + printf_filtered (" in overlay section %s", section->name); + } + break; + + case LOC_REGPARM: + printf_filtered ("an argument in register %s", REGISTER_NAME (val)); + break; + + case LOC_REGPARM_ADDR: + printf_filtered ("address of an argument in register %s", REGISTER_NAME (val)); + break; + + case LOC_ARG: + printf_filtered ("an argument at offset %ld", val); + break; + + case LOC_LOCAL_ARG: + printf_filtered ("an argument at frame offset %ld", val); + break; + + case LOC_LOCAL: + printf_filtered ("a local variable at frame offset %ld", val); + break; + + case LOC_REF_ARG: + printf_filtered ("a reference argument at offset %ld", val); + break; + + case LOC_BASEREG: + printf_filtered ("a variable at offset %ld from register %s", + val, REGISTER_NAME (basereg)); + break; + + case LOC_BASEREG_ARG: + printf_filtered ("an argument at offset %ld from register %s", + val, REGISTER_NAME (basereg)); + break; + + case LOC_TYPEDEF: + printf_filtered ("a typedef"); + break; + + case LOC_BLOCK: + printf_filtered ("a function at address "); +#ifdef GDB_TARGET_MASK_DISAS_PC + print_address_numeric + (load_addr= GDB_TARGET_MASK_DISAS_PC (BLOCK_START (SYMBOL_BLOCK_VALUE (sym))), + 1, gdb_stdout); +#else + print_address_numeric (load_addr=BLOCK_START (SYMBOL_BLOCK_VALUE (sym)), + 1, gdb_stdout); +#endif + if (section_is_overlay (section)) + { + load_addr = overlay_unmapped_address (load_addr, section); + printf_filtered (",\n -- loaded at "); + print_address_numeric (load_addr, 1, gdb_stdout); + printf_filtered (" in overlay section %s", section->name); + } + break; + + case LOC_UNRESOLVED: + { + struct minimal_symbol *msym; + + msym = lookup_minimal_symbol (SYMBOL_NAME (sym), NULL, NULL); + if (msym == NULL) + printf_filtered ("unresolved"); + else + { + section = SYMBOL_BFD_SECTION (msym); + printf_filtered ("static storage at address "); + print_address_numeric (load_addr = SYMBOL_VALUE_ADDRESS (msym), + 1, gdb_stdout); + if (section_is_overlay (section)) + { + load_addr = overlay_unmapped_address (load_addr, section); + printf_filtered (",\n -- loaded at "); + print_address_numeric (load_addr, 1, gdb_stdout); + printf_filtered (" in overlay section %s", section->name); + } + } + } + break; + + case LOC_THREAD_LOCAL_STATIC: + printf_filtered ( + "a thread-local variable at offset %ld from the thread base register %s", + val, REGISTER_NAME (basereg)); + break; + + case LOC_OPTIMIZED_OUT: + printf_filtered ("optimized out"); + break; + + default: + printf_filtered ("of unknown (botched) type"); + break; + } + printf_filtered (".\n"); +} + +void +x_command (exp, from_tty) + char *exp; + int from_tty; +{ + struct expression *expr; + struct format_data fmt; + struct cleanup *old_chain; + struct value *val; + + fmt.format = last_format; + fmt.size = last_size; + fmt.count = 1; + + if (exp && *exp == '/') + { + exp++; + fmt = decode_format (&exp, last_format, last_size); + } + + /* If we have an expression, evaluate it and use it as the address. */ + + if (exp != 0 && *exp != 0) + { + expr = parse_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. */ + if (from_tty) + *exp = 0; + old_chain = make_cleanup ((make_cleanup_func) free_current_contents, + &expr); + val = evaluate_expression (expr); + if (TYPE_CODE (VALUE_TYPE (val)) == TYPE_CODE_REF) + val = value_ind (val); + /* 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); + else + next_address = value_as_pointer (val); + if (VALUE_BFD_SECTION (val)) + next_section = VALUE_BFD_SECTION (val); + do_cleanups (old_chain); + } + + do_examine (fmt, next_address, next_section); + + /* If the examine succeeds, we remember its size and format for next time. */ + last_size = fmt.size; + last_format = fmt.format; + + /* Set a couple of internal variables if appropriate. */ + if (last_examine_value) + { + /* Make last address examined available to the user as $_. Use + the correct pointer type. */ + set_internalvar (lookup_internalvar ("_"), + value_from_longest ( + lookup_pointer_type (VALUE_TYPE (last_examine_value)), + (LONGEST) last_examine_address)); + + /* Make contents of last address examined available to the user as $__.*/ + /* If the last value has not been fetched from memory then don't + fetch it now - instead mark it by voiding the $__ variable. */ + if (VALUE_LAZY (last_examine_value)) + set_internalvar (lookup_internalvar ("__"), + allocate_value (builtin_type_void)); + else + set_internalvar (lookup_internalvar ("__"), last_examine_value); + } +} + + +/* Add an expression to the auto-display chain. + Specify the expression. */ + +static void +display_command (exp, from_tty) + char *exp; + int from_tty; +{ + struct format_data fmt; + register struct expression *expr; + register struct display *new; + int display_it = 1; + +#if defined(TUI) + if (tui_version && *exp == '$') + display_it = ((TuiStatus)tuiDo( + (TuiOpaqueFuncPtr)tui_vSetLayoutTo, exp) == TUI_FAILURE); +#endif + + if (display_it) + { + if (exp == 0) + { + do_displays (); + return; + } + + if (*exp == '/') + { + exp++; + fmt = decode_format (&exp, 0, 0); + if (fmt.size && fmt.format == 0) + fmt.format = 'x'; + if (fmt.format == 'i' || fmt.format == 's') + fmt.size = 'b'; + } + else + { + fmt.format = 0; + fmt.size = 0; + fmt.count = 0; + } + + innermost_block = 0; + expr = parse_expression (exp); + + new = (struct display *) xmalloc (sizeof (struct display)); + + new->exp = expr; + new->block = innermost_block; + new->next = display_chain; + new->number = ++display_number; + new->format = fmt; + new->status = enabled; + display_chain = new; + + if (from_tty && target_has_execution) + do_one_display (new); + + dont_repeat (); + } +} + +static void +free_display (d) + struct display *d; +{ + free ((PTR)d->exp); + free ((PTR)d); +} + +/* Clear out the display_chain. + Done when new symtabs are loaded, since this invalidates + the types stored in many expressions. */ + +void +clear_displays () +{ + register struct display *d; + + while ((d = display_chain) != NULL) + { + free ((PTR)d->exp); + display_chain = d->next; + free ((PTR)d); + } +} + +/* Delete the auto-display number NUM. */ + +static void +delete_display (num) + int num; +{ + register struct display *d1, *d; + + if (!display_chain) + error ("No display number %d.", num); + + if (display_chain->number == num) + { + d1 = display_chain; + display_chain = d1->next; + free_display (d1); + } + else + for (d = display_chain; ; d = d->next) + { + if (d->next == 0) + error ("No display number %d.", num); + if (d->next->number == num) + { + d1 = d->next; + d->next = d1->next; + free_display (d1); + break; + } + } +} + +/* Delete some values from the auto-display chain. + Specify the element numbers. */ + +static void +undisplay_command (args, from_tty) + char *args; + int from_tty; +{ + register char *p = args; + register char *p1; + register int num; + + if (args == 0) + { + if (query ("Delete all auto-display expressions? ")) + clear_displays (); + dont_repeat (); + return; + } + + while (*p) + { + p1 = p; + while (*p1 >= '0' && *p1 <= '9') p1++; + if (*p1 && *p1 != ' ' && *p1 != '\t') + error ("Arguments must be display numbers."); + + num = atoi (p); + + delete_display (num); + + p = p1; + while (*p == ' ' || *p == '\t') p++; + } + dont_repeat (); +} + +/* Display a single auto-display. + Do nothing if the display cannot be printed in the current context, + or if the display is disabled. */ + +static void +do_one_display (d) + struct display *d; +{ + int within_current_scope; + + if (d->status == disabled) + return; + + if (d->block) + within_current_scope = contained_in (get_selected_block (), d->block); + else + within_current_scope = 1; + if (!within_current_scope) + return; + + current_display_number = d->number; + + annotate_display_begin (); + printf_filtered ("%d", d->number); + annotate_display_number_end (); + printf_filtered (": "); + if (d->format.size) + { + CORE_ADDR addr; + value_ptr val; + + annotate_display_format (); + + printf_filtered ("x/"); + 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); + printf_filtered (" "); + + annotate_display_expression (); + + print_expression (d->exp, gdb_stdout); + annotate_display_expression_end (); + + if (d->format.count != 1) + printf_filtered ("\n"); + else + printf_filtered (" "); + + val = evaluate_expression (d->exp); + addr = value_as_pointer (val); + if (d->format.format == 'i') + addr = ADDR_BITS_REMOVE (addr); + + annotate_display_value (); + + do_examine (d->format, addr, VALUE_BFD_SECTION (val)); + } + else + { + annotate_display_format (); + + if (d->format.format) + printf_filtered ("/%c ", d->format.format); + + annotate_display_expression (); + + print_expression (d->exp, gdb_stdout); + annotate_display_expression_end (); + + printf_filtered (" = "); + + annotate_display_expression (); + + print_formatted (evaluate_expression (d->exp), + d->format.format, d->format.size); + printf_filtered ("\n"); + } + + annotate_display_end (); + + gdb_flush (gdb_stdout); + current_display_number = -1; +} + +/* Display all of the values on the auto-display chain which can be + evaluated in the current scope. */ + +void +do_displays () +{ + register struct display *d; + + for (d = display_chain; d; d = d->next) + do_one_display (d); +} + +/* Delete the auto-display which we were in the process of displaying. + This is done when there is an error or a signal. */ + +void +disable_display (num) + int num; +{ + register struct display *d; + + for (d = display_chain; d; d = d->next) + if (d->number == num) + { + d->status = disabled; + return; + } + printf_unfiltered ("No display number %d.\n", num); +} + +void +disable_current_display () +{ + if (current_display_number >= 0) + { + disable_display (current_display_number); + fprintf_unfiltered (gdb_stderr, "Disabling display %d to avoid infinite recursion.\n", + current_display_number); + } + current_display_number = -1; +} + +static void +display_info (ignore, from_tty) + char *ignore; + int from_tty; +{ + register struct display *d; + + if (!display_chain) + printf_unfiltered ("There are no auto-display expressions now.\n"); + else + printf_filtered ("Auto-display expressions now in effect:\n\ +Num Enb Expression\n"); + + for (d = display_chain; d; d = d->next) + { + printf_filtered ("%d: %c ", d->number, "ny"[(int)d->status]); + if (d->format.size) + printf_filtered ("/%d%c%c ", d->format.count, d->format.size, + d->format.format); + else if (d->format.format) + printf_filtered ("/%c ", d->format.format); + print_expression (d->exp, gdb_stdout); + if (d->block && !contained_in (get_selected_block (), d->block)) + printf_filtered (" (cannot be evaluated in the current context)"); + printf_filtered ("\n"); + gdb_flush (gdb_stdout); + } +} + +static void +enable_display (args, from_tty) + char *args; + int from_tty; +{ + register char *p = args; + register char *p1; + register int num; + register struct display *d; + + if (p == 0) + { + for (d = display_chain; d; d = d->next) + d->status = enabled; + } + else + while (*p) + { + p1 = p; + while (*p1 >= '0' && *p1 <= '9') + p1++; + if (*p1 && *p1 != ' ' && *p1 != '\t') + error ("Arguments must be display numbers."); + + num = atoi (p); + + for (d = display_chain; d; d = d->next) + if (d->number == num) + { + d->status = enabled; + goto win; + } + printf_unfiltered ("No display number %d.\n", num); + win: + p = p1; + while (*p == ' ' || *p == '\t') + p++; + } +} + +/* ARGSUSED */ +static void +disable_display_command (args, from_tty) + char *args; + int from_tty; +{ + register char *p = args; + register char *p1; + register struct display *d; + + if (p == 0) + { + for (d = display_chain; d; d = d->next) + d->status = disabled; + } + else + while (*p) + { + p1 = p; + while (*p1 >= '0' && *p1 <= '9') + p1++; + if (*p1 && *p1 != ' ' && *p1 != '\t') + error ("Arguments must be display numbers."); + + disable_display (atoi (p)); + + p = p1; + while (*p == ' ' || *p == '\t') + p++; + } +} + + +/* Print the value in stack frame FRAME of a variable + specified by a struct symbol. */ + +void +print_variable_value (var, frame, stream) + struct symbol *var; + struct frame_info *frame; + GDB_FILE *stream; +{ + value_ptr 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). */ + +/* References here and elsewhere to "number of args according to the + stack frame" appear in all cases to refer to "number of ints of args + according to the stack frame". At least for VAX, i386, isi. */ + +void +print_frame_args (func, fi, num, stream) + struct symbol *func; + struct frame_info *fi; + int num; + GDB_FILE *stream; +{ + struct block *b = NULL; + int nsyms = 0; + int first = 1; + register int i; + register struct symbol *sym; + register value_ptr val; + /* Offset of next stack argument beyond the one we have seen that is + at the highest offset. + -1 if we haven't come to a stack argument yet. */ + long highest_offset = -1; + int arg_size; + /* Number of ints of arguments that we have printed so far. */ + int args_printed = 0; + + if (func) + { + b = SYMBOL_BLOCK_VALUE (func); + nsyms = BLOCK_NSYMS (b); + } + + for (i = 0; i < nsyms; i++) + { + QUIT; + sym = BLOCK_SYM (b, i); + + /* Keep track of the highest stack argument offset seen, and + skip over any kinds of symbols we don't care about. */ + + switch (SYMBOL_CLASS (sym)) { + case LOC_ARG: + case LOC_REF_ARG: + { + long current_offset = SYMBOL_VALUE (sym); + arg_size = TYPE_LENGTH (SYMBOL_TYPE (sym)); + + /* Compute address of next argument by adding the size of + this argument and rounding to an int boundary. */ + current_offset + = ((current_offset + arg_size + sizeof (int) - 1) + & ~(sizeof (int) - 1)); + + /* If this is the highest offset seen yet, set highest_offset. */ + if (highest_offset == -1 + || (current_offset > highest_offset)) + highest_offset = current_offset; + + /* Add the number of ints we're about to print to args_printed. */ + args_printed += (arg_size + sizeof (int) - 1) / sizeof (int); + } + + /* We care about types of symbols, but don't need to keep track of + stack offsets in them. */ + case LOC_REGPARM: + case LOC_REGPARM_ADDR: + case LOC_LOCAL_ARG: + case LOC_BASEREG_ARG: + break; + + /* Other types of symbols we just skip over. */ + default: + continue; + } + + /* We have to look up the symbol because arguments can have + two entries (one a parameter, one a local) and the one we + want is the local, which lookup_symbol will find for us. + This includes gcc1 (not gcc2) on the sparc when passing a + small structure and gcc2 when the argument type is float + and it is passed as a double and converted to float by + the prologue (in the latter case the type of the LOC_ARG + symbol is double and the type of the LOC_LOCAL symbol is + float). */ + /* But if the parameter name is null, don't try it. + Null parameter names occur on the RS/6000, for traceback tables. + FIXME, should we even print them? */ + + if (*SYMBOL_NAME (sym)) + { + struct symbol *nsym; + nsym = lookup_symbol + (SYMBOL_NAME (sym), + b, VAR_NAMESPACE, (int *)NULL, (struct symtab **)NULL); + if (SYMBOL_CLASS (nsym) == LOC_REGISTER) + { + /* There is a LOC_ARG/LOC_REGISTER pair. This means that + it was passed on the stack and loaded into a register, + or passed in a register and stored in a stack slot. + GDB 3.x used the LOC_ARG; GDB 4.0-4.11 used the LOC_REGISTER. + + Reasons for using the LOC_ARG: + (1) because find_saved_registers may be slow for remote + debugging, + (2) because registers are often re-used and stack slots + rarely (never?) are. Therefore using the stack slot is + much less likely to print garbage. + + Reasons why we might want to use the LOC_REGISTER: + (1) So that the backtrace prints the same value as + "print foo". I see no compelling reason why this needs + to be the case; having the backtrace print the value which + was passed in, and "print foo" print the value as modified + within the called function, makes perfect sense to me. + + Additional note: It might be nice if "info args" displayed + both values. + One more note: There is a case with sparc structure passing + where we need to use the LOC_REGISTER, but this is dealt with + by creating a single LOC_REGPARM in symbol reading. */ + + /* Leave sym (the LOC_ARG) alone. */ + ; + } + else + sym = nsym; + } + + /* Print the current arg. */ + if (! first) + fprintf_filtered (stream, ", "); + wrap_here (" "); + + annotate_arg_begin (); + + fprintf_symbol_filtered (stream, SYMBOL_SOURCE_NAME (sym), + SYMBOL_LANGUAGE (sym), DMGL_PARAMS | DMGL_ANSI); + annotate_arg_name_end (); + fputs_filtered ("=", stream); + + /* Avoid value_print because it will deref ref parameters. We just + want to print their addresses. Print ??? for args whose address + we do not know. We pass 2 as "recurse" to val_print because our + standard indentation here is 4 spaces, and val_print indents + 2 for each recurse. */ + val = read_var_value (sym, fi); + + annotate_arg_value (val == NULL ? NULL : VALUE_TYPE (val)); + + if (val) + { +#ifdef GDB_TARGET_IS_D10V + if (SYMBOL_CLASS(sym) == LOC_REGPARM && TYPE_CODE(VALUE_TYPE(val)) == TYPE_CODE_PTR) + TYPE_LENGTH(VALUE_TYPE(val)) = 2; +#endif + val_print (VALUE_TYPE (val), VALUE_CONTENTS (val), 0, + VALUE_ADDRESS (val), + stream, 0, 0, 2, Val_no_prettyprint); + } + else + fputs_filtered ("???", stream); + + annotate_arg_end (); + + first = 0; + } + + /* Don't print nameless args in situations where we don't know + enough about the stack to find them. */ + if (num != -1) + { + long start; + + if (highest_offset == -1) + start = FRAME_ARGS_SKIP; + else + start = highest_offset; + + print_frame_nameless_args (fi, start, num - args_printed, + first, stream); + } +} + +/* Print nameless args on STREAM. + FI is the frameinfo for this frame, START is the offset + of the first nameless arg, and NUM is the number of nameless args to + print. FIRST is nonzero if this is the first argument (not just + the first nameless arg). */ + +static void +print_frame_nameless_args (fi, start, num, first, stream) + struct frame_info *fi; + long start; + int num; + int first; + GDB_FILE *stream; +{ + int i; + CORE_ADDR argsaddr; + long arg_value; + + for (i = 0; i < num; i++) + { + QUIT; +#ifdef NAMELESS_ARG_VALUE + NAMELESS_ARG_VALUE (fi, start, &arg_value); +#else + argsaddr = FRAME_ARGS_ADDRESS (fi); + if (!argsaddr) + return; + + arg_value = read_memory_integer (argsaddr + start, sizeof (int)); +#endif + + if (!first) + fprintf_filtered (stream, ", "); + +#ifdef PRINT_NAMELESS_INTEGER + PRINT_NAMELESS_INTEGER (stream, arg_value); +#else +#ifdef PRINT_TYPELESS_INTEGER + PRINT_TYPELESS_INTEGER (stream, builtin_type_int, (LONGEST) arg_value); +#else + fprintf_filtered (stream, "%ld", arg_value); +#endif /* PRINT_TYPELESS_INTEGER */ +#endif /* PRINT_NAMELESS_INTEGER */ + first = 0; + start += sizeof (int); + } +} + +/* ARGSUSED */ +static void +printf_command (arg, from_tty) + char *arg; + int from_tty; +{ + register char *f = NULL; + register char *s = arg; + char *string = NULL; + value_ptr *val_args; + char *substrings; + char *current_substring; + int nargs = 0; + int allocated_args = 20; + struct cleanup *old_cleanups; + + val_args = (value_ptr *) xmalloc (allocated_args * sizeof (value_ptr)); + old_cleanups = make_cleanup ((make_cleanup_func) free_current_contents, + &val_args); + + if (s == 0) + 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 */ + if (*s++ != '"') + 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); + + while (*s != '"') + { + int c = *s++; + switch (c) + { + case '\0': + error ("Bad format string, non-terminated '\"'."); + + case '\\': + switch (c = *s++) + { + case '\\': + *f++ = '\\'; + break; + case 'a': +#ifdef __STDC__ + *f++ = '\a'; +#else + *f++ = '\007'; /* Bell */ +#endif + break; + case 'b': + *f++ = '\b'; + break; + case 'f': + *f++ = '\f'; + break; + case 'n': + *f++ = '\n'; + break; + case 'r': + *f++ = '\r'; + break; + case 't': + *f++ = '\t'; + break; + case 'v': + *f++ = '\v'; + break; + case '"': + *f++ = '"'; + break; + default: + /* ??? TODO: handle other escape sequences */ + error ("Unrecognized escape character \\%c in format string.", + c); + } + break; + + default: + *f++ = c; + } + } + + /* Skip over " and following space and comma. */ + s++; + *f++ = '\0'; + while (*s == ' ' || *s == '\t') s++; + + if (*s != ',' && *s != 0) + error ("Invalid argument syntax"); + + if (*s == ',') s++; + while (*s == ' ' || *s == '\t') s++; + + /* Need extra space for the '\0's. Doubling the size is sufficient. */ + substrings = alloca (strlen (string) * 2); + current_substring = substrings; + + { + /* Now scan the string for %-specs and see what kinds of args they want. + argclass[I] classifies the %-specs so we can give printf_filtered + something of the right size. */ + + enum argclass {no_arg, int_arg, string_arg, double_arg, long_long_arg}; + enum argclass *argclass; + enum argclass this_argclass; + char *last_arg; + int nargs_wanted; + int lcount; + int i; + + argclass = (enum argclass *) alloca (strlen (s) * sizeof *argclass); + nargs_wanted = 0; + f = string; + last_arg = string; + while (*f) + if (*f++ == '%') + { + lcount = 0; + while (strchr ("0123456789.hlL-+ #", *f)) + { + if (*f == 'l' || *f == 'L') + lcount++; + f++; + } + switch (*f) + { + case 's': + this_argclass = string_arg; + break; + + case 'e': + case 'f': + case 'g': + this_argclass = double_arg; + break; + + case '*': + error ("`*' not supported for precision or width in printf"); + + case 'n': + error ("Format specifier `n' not supported in printf"); + + case '%': + this_argclass = no_arg; + break; + + default: + if (lcount > 1) + this_argclass = long_long_arg; + else + this_argclass = int_arg; + break; + } + f++; + if (this_argclass != no_arg) + { + strncpy (current_substring, last_arg, f - last_arg); + current_substring += f - last_arg; + *current_substring++ = '\0'; + last_arg = f; + argclass[nargs_wanted++] = this_argclass; + } + } + + /* Now, parse all arguments and evaluate them. + Store the VALUEs in VAL_ARGS. */ + + while (*s != '\0') + { + char *s1; + if (nargs == allocated_args) + val_args = (value_ptr *) xrealloc ((char *) val_args, + (allocated_args *= 2) + * sizeof (value_ptr)); + s1 = s; + 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) + { + struct type *type = VALUE_TYPE (val_args[nargs]); + if (TYPE_LENGTH (type) == sizeof (float)) + VALUE_TYPE (val_args[nargs]) = builtin_type_float; + if (TYPE_LENGTH (type) == sizeof (double)) + VALUE_TYPE (val_args[nargs]) = builtin_type_double; + } + nargs++; + s = s1; + if (*s == ',') + s++; + } + + if (nargs != nargs_wanted) + error ("Wrong number of arguments for specified format-string"); + + /* Now actually print them. */ + current_substring = substrings; + for (i = 0; i < nargs; i++) + { + switch (argclass[i]) + { + case string_arg: + { + char *str; + CORE_ADDR tem; + int j; + tem = value_as_pointer (val_args[i]); + + /* This is a %s argument. Find the length of the string. */ + for (j = 0; ; j++) + { + char c; + QUIT; + read_memory_section (tem + j, &c, 1, + VALUE_BFD_SECTION (val_args[i])); + if (c == 0) + break; + } + + /* Copy the string contents into a string inside GDB. */ + str = (char *) alloca (j + 1); + read_memory_section (tem, str, j, VALUE_BFD_SECTION (val_args[i])); + str[j] = 0; + + printf_filtered (current_substring, str); + } + break; + case double_arg: + { + double val = value_as_double (val_args[i]); + printf_filtered (current_substring, val); + break; + } + case long_long_arg: +#if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG) + { + long long val = value_as_long (val_args[i]); + printf_filtered (current_substring, val); + break; + } +#else + error ("long long not supported in printf"); +#endif + case int_arg: + { + /* FIXME: there should be separate int_arg and long_arg. */ + long val = value_as_long (val_args[i]); + printf_filtered (current_substring, val); + break; + } + default: /* purecov: deadcode */ + error ("internal error in printf_command"); /* purecov: deadcode */ + } + /* Skip to the next substring. */ + current_substring += strlen (current_substring) + 1; + } + /* Print the portion of the format string after the last argument. */ + printf_filtered (last_arg); + } + do_cleanups (old_cleanups); +} + +/* 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 + assembly. */ + +/* ARGSUSED */ +static void +disassemble_command (arg, from_tty) + char *arg; + int from_tty; +{ + CORE_ADDR low, high; + char *name; + CORE_ADDR pc, pc_masked; + char *space_index; +#if 0 + asection *section; +#endif + + name = NULL; + if (!arg) + { + if (!selected_frame) + error ("No frame selected.\n"); + + pc = get_frame_pc (selected_frame); + if (find_pc_partial_function (pc, &name, &low, &high) == 0) + error ("No function contains program counter for selected frame.\n"); +#if defined(TUI) + else if (tui_version) + low = (CORE_ADDR)tuiDo((TuiOpaqueFuncPtr)tui_vGetLowDisassemblyAddress, + (Opaque)low, + (Opaque)pc); +#endif + low += FUNCTION_START_OFFSET; + } + else if (!(space_index = (char *) strchr (arg, ' '))) + { + /* One argument. */ + pc = parse_and_eval_address (arg); + if (find_pc_partial_function (pc, &name, &low, &high) == 0) + error ("No function contains specified address.\n"); +#if defined(TUI) + else if (tui_version) + low = (CORE_ADDR)tuiDo((TuiOpaqueFuncPtr)tui_vGetLowDisassemblyAddress, + (Opaque)low, + (Opaque)pc); +#endif +#if 0 + if (overlay_debugging) + { + section = find_pc_overlay (pc); + if (pc_in_unmapped_range (pc, section)) + { + /* find_pc_partial_function will have returned low and high + relative to the symbolic (mapped) address range. Need to + translate them back to the unmapped range where PC is. */ + low = overlay_unmapped_address (low, section); + high = overlay_unmapped_address (high, section); + } + } +#endif + low += FUNCTION_START_OFFSET; + } + else + { + /* Two arguments. */ + *space_index = '\0'; + low = parse_and_eval_address (arg); + high = parse_and_eval_address (space_index + 1); + } + +#if defined(TUI) + if (!tui_version || + m_winPtrIsNull(disassemWin) || !disassemWin->generic.isVisible) +#endif + { + printf_filtered ("Dump of assembler code "); + if (name != NULL) + { + printf_filtered ("for function %s:\n", name); + } + else + { + printf_filtered ("from "); + print_address_numeric (low, 1, gdb_stdout); + printf_filtered (" to "); + print_address_numeric (high, 1, gdb_stdout); + printf_filtered (":\n"); + } + + /* Dump the specified range. */ + pc = low; + +#ifdef GDB_TARGET_MASK_DISAS_PC + pc_masked = GDB_TARGET_MASK_DISAS_PC (pc); +#else + pc_masked = pc; +#endif + + while (pc_masked < high) + { + QUIT; + print_address (pc_masked, gdb_stdout); + printf_filtered (":\t"); + /* We often wrap here if there are long symbolic names. */ + wrap_here (" "); + pc += print_insn (pc, gdb_stdout); + printf_filtered ("\n"); + +#ifdef GDB_TARGET_MASK_DISAS_PC + pc_masked = GDB_TARGET_MASK_DISAS_PC (pc); +#else + pc_masked = pc; +#endif + } + printf_filtered ("End of assembler dump.\n"); + gdb_flush (gdb_stdout); + } +#if defined(TUI) + else + { + tuiDo((TuiOpaqueFuncPtr)tui_vAddWinToLayout, DISASSEM_WIN); + tuiDo((TuiOpaqueFuncPtr)tui_vUpdateSourceWindowsWithAddr, low); + } +#endif +} + +/* Print the instruction at address MEMADDR in debugged memory, + on STREAM. Returns length of the instruction, in bytes. */ + +static int +print_insn (memaddr, stream) + CORE_ADDR memaddr; + GDB_FILE *stream; +{ + if (TARGET_BYTE_ORDER == BIG_ENDIAN) + TARGET_PRINT_INSN_INFO->endian = BFD_ENDIAN_BIG; + else + TARGET_PRINT_INSN_INFO->endian = BFD_ENDIAN_LITTLE; + + if (TARGET_ARCHITECTURE != NULL) + TARGET_PRINT_INSN_INFO->mach = TARGET_ARCHITECTURE->mach; + /* else: should set .mach=0 but some disassemblers don't grok this */ + + return TARGET_PRINT_INSN (memaddr, TARGET_PRINT_INSN_INFO); +} + + +void +_initialize_printcmd () +{ + current_display_number = -1; + + add_info ("address", address_info, + "Describe where symbol SYM is stored."); + + add_info ("symbol", sym_info, + "Describe what symbol is at location ADDR.\n\ +Only for symbols with fixed locations (global or static scope)."); + + add_com ("x", class_vars, x_command, + concat ("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\ + t(binary), 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\ +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\".", NULL)); + + 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."); + if (xdb_commands) + add_com_alias ("va", "disassemble", class_xdb, 0); + +#if 0 + add_com ("whereis", class_vars, whereis_command, + "Print line number and file of definition of variable."); +#endif + + 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.", + &cmdlist); + + 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, +concat ("Evaluate expression EXP and assign result to variable VAR, using assignment\n\ +syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\ +example). VAR may be a debugger \"convenience\" variable (names starting\n\ +with $), a register (a few standard names starting with $), or an actual\n\ +variable in the program being debugged. EXP is any valid 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.\n\ +You can see these environment settings with the \"show\" command.", NULL), + &setlist, "set ", 1, &cmdlist); + if (dbx_commands) + add_com("assign", class_vars, set_command, concat ("Evaluate expression \ +EXP and assign result to variable VAR, using assignment\n\ +syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\ +example). VAR may be a debugger \"convenience\" variable (names starting\n\ +with $), a register (a few standard names starting with $), or an actual\n\ +variable in the program being debugged. EXP is any valid 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.\n\ +You can see these environment settings with the \"show\" command.", NULL)); + + /* "call" is the same as "set", but handy for dbx users to call fns. */ + add_com ("call", class_vars, call_command, + "Call a function in the program.\n\ +The argument is the function name and arguments, in the notation of the\n\ +current working language. The result is printed and saved in the value\n\ +history, if it is not void."); + + add_cmd ("variable", class_vars, set_command, +"Evaluate expression EXP and assign result to variable VAR, using assignment\n\ +syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\ +example). VAR may be a debugger \"convenience\" variable (names starting\n\ +with $), a register (a few standard names starting with $), or an actual\n\ +variable in the program being debugged. EXP is any valid expression.\n\ +This may usually be abbreviated to simply \"set\".", + &setlist); + + add_com ("print", class_vars, print_command, + concat ("Print value of expression EXP.\n\ +Variables accessible are those of the lexical environment of the selected\n\ +stack frame, plus all those whose scope is global or an entire file.\n\ +\n\ +$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", + "\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\ +resides in memory.\n", + "\n\ +EXP may be preceded with /FMT, where FMT is a format letter\n\ +but no count or size letter (see \"x\" command).", NULL)); + add_com_alias ("p", "print", class_vars, 1); + + add_com ("inspect", class_vars, inspect_command, +"Same as \"print\" command, except that if you are running in the epoch\n\ +environment, the value is printed in its own window."); + + add_show_from_set ( + add_set_cmd ("max-symbolic-offset", no_class, var_uinteger, + (char *)&max_symbolic_offset, + "Set the largest offset that will be printed in <symbol+1234> form.", + &setprintlist), + &showprintlist); + add_show_from_set ( + add_set_cmd ("symbol-filename", no_class, var_boolean, + (char *)&print_symbol_filename, + "Set printing of source filename and line number with <symbol>.", + &setprintlist), + &showprintlist); + + /* For examine/instruction a single byte quantity is specified as + the data. This avoids problems with value_at_lazy() requiring a + valid data type (and rejecting VOID). */ + examine_i_type = init_type (TYPE_CODE_INT, 1, 0, "examine_i_type", NULL); + + examine_b_type = init_type (TYPE_CODE_INT, 1, 0, "examine_b_type", NULL); + examine_h_type = init_type (TYPE_CODE_INT, 2, 0, "examine_h_type", NULL); + examine_w_type = init_type (TYPE_CODE_INT, 4, 0, "examine_w_type", NULL); + examine_g_type = init_type (TYPE_CODE_INT, 8, 0, "examine_g_type", NULL); + +} |