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main_spim.c
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main_spim.c
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/* SPIM S20 MIPS simulator.
Terminal interface for SPIM simulator.
Copyright (c) 1990-2010, James R. Larus.
All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation and/or
other materials provided with the distribution.
Neither the name of the James R. Larus nor the names of its contributors may be
used to endorse or promote products derived from this software without specific
prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef WIN32
#include <unistd.h>
#endif
#include <stdio.h>
#include <ctype.h>
#include <setjmp.h>
#include <signal.h>
#include <arpa/inet.h>
#ifdef RS
/* This is problem on HP Snakes, which define RS in syscall.h */
#undef RS
#endif
#include <sys/types.h>
#include <sys/select.h>
#ifdef _AIX
#ifndef NBBY
#define NBBY 8
#endif
#endif
#ifndef WIN32
#include <sys/time.h>
#ifdef USE_TERMIOS
#include <termios.h>
#else
#include <sys/ioctl.h>
#include <sgtty.h>
#endif
#endif
#include <stdarg.h>
#include "spim.h"
#include "string-stream.h"
#include "spim-utils.h"
#include "inst.h"
#include "reg.h"
#include "mem.h"
#include "parser.h"
#include "sym-tbl.h"
#include "scanner.h"
#include "y.tab.h"
/* Internal functions: */
static void console_to_program ();
static void console_to_spim ();
static void flush_to_newline ();
static int get_opt_int ();
static int parse_spim_command (FILE *file, int redo);
static int print_reg (int reg_no);
static int print_fp_reg (int reg_no);
static int print_reg_from_string (char *reg);
static void print_all_regs (int hex_flag);
static int read_assembly_command ();
static int str_prefix (char *s1, char *s2, int min_match);
static void top_level ();
static int read_token ();
/* Exported Variables: */
/* Not local, but not export so all files don't need setjmp.h */
jmp_buf spim_top_level_env; /* For ^C */
int bare_machine; /* Non-Zero => simulate bare machine */
int delayed_branches; /* Non-Zero => simulate delayed branches */
int delayed_loads; /* Non-Zero => simulate delayed loads */
int accept_pseudo_insts; /* Non-Zero => parse pseudo instructions */
int quiet; /* Non-Zero => no warning messages */
char *exception_file_name = DEFAULT_EXCEPTION_HANDLER;
port message_out, console_out, console_in;
int mapped_io; /* Non-zero => activate memory-mapped IO */
int pipe_out;
int spim_return_value; /* Value returned when spim exits */
/* Local variables: */
/* Non-zero => load standard exception handler */
static int load_exception_handler = 1;
static int console_state_saved;
#ifdef USE_TERMIOS
static struct termios saved_console_state;
#else
static struct sgttyb saved_console_state;
#endif
static int program_argc;
static char** program_argv;
int
main (int argc, char **argv)
{
int i;
int assembly_file_loaded = 0;
int print_usage_msg = 0;
console_out.f = stdout;
message_out.f = stdout;
bare_machine = 0;
delayed_branches = 0;
delayed_loads = 0;
accept_pseudo_insts = 1;
quiet = 0;
spim_return_value = 0;
/* Input comes directly (not through stdio): */
console_in.i = 0;
mapped_io = 0;
write_startup_message ();
if (getenv ("SPIM_EXCEPTION_HANDLER") != NULL)
exception_file_name = getenv ("SPIM_EXCEPTION_HANDLER");
for (i = 1; i < argc; i++)
{
#ifdef WIN32
if (argv [i][0] == '/') { argv [i][0] = '-'; }
#endif
if (streq (argv [i], "-asm")
|| streq (argv [i], "-a"))
{
bare_machine = 0;
delayed_branches = 0;
delayed_loads = 0;
}
else if (streq (argv [i], "-bare")
|| streq (argv [i], "-b"))
{
bare_machine = 1;
delayed_branches = 1;
delayed_loads = 1;
quiet = 1;
}
else if (streq (argv [i], "-delayed_branches")
|| streq (argv [i], "-db"))
{
delayed_branches = 1;
}
else if (streq (argv [i], "-delayed_loads")
|| streq (argv [i], "-dl"))
{
delayed_loads = 1;
}
else if (streq (argv [i], "-exception")
|| streq (argv [i], "-e"))
{ load_exception_handler = 1; }
else if (streq (argv [i], "-noexception")
|| streq (argv [i], "-ne"))
{ load_exception_handler = 0; }
else if (streq (argv [i], "-exception_file")
|| streq (argv [i], "-ef"))
{
exception_file_name = argv[++i];
load_exception_handler = 1;
}
else if (streq (argv [i], "-mapped_io")
|| streq (argv [i], "-mio"))
{ mapped_io = 1; }
else if (streq (argv [i], "-nomapped_io")
|| streq (argv [i], "-nmio"))
{ mapped_io = 0; }
else if (streq (argv [i], "-pseudo")
|| streq (argv [i], "-p"))
{ accept_pseudo_insts = 1; }
else if (streq (argv [i], "-nopseudo")
|| streq (argv [i], "-np"))
{ accept_pseudo_insts = 0; }
else if (streq (argv [i], "-quiet")
|| streq (argv [i], "-q"))
{ quiet = 1; }
else if (streq (argv [i], "-noquiet")
|| streq (argv [i], "-nq"))
{ quiet = 0; }
else if (streq (argv [i], "-trap")
|| streq (argv [i], "-t"))
{ load_exception_handler = 1; }
else if (streq (argv [i], "-notrap")
|| streq (argv [i], "-nt"))
{ load_exception_handler = 0; }
else if (streq (argv [i], "-trap_file")
|| streq (argv [i], "-tf"))
{
exception_file_name = argv[++i];
load_exception_handler = 1;
}
else if (streq (argv [i], "-stext")
|| streq (argv [i], "-st"))
{ initial_text_size = atoi (argv[++i]); }
else if (streq (argv [i], "-sdata")
|| streq (argv [i], "-sd"))
{ initial_data_size = atoi (argv[++i]); }
else if (streq (argv [i], "-ldata")
|| streq (argv [i], "-ld"))
{ initial_data_limit = atoi (argv[++i]); }
else if (streq (argv [i], "-sstack")
|| streq (argv [i], "-ss"))
{ initial_stack_size = atoi (argv[++i]); }
else if (streq (argv [i], "-lstack")
|| streq (argv [i], "-ls"))
{ initial_stack_limit = atoi (argv[++i]); }
else if (streq (argv [i], "-sktext")
|| streq (argv [i], "-skt"))
{ initial_k_text_size = atoi (argv[++i]); }
else if (streq (argv [i], "-skdata")
|| streq (argv [i], "-skd"))
{ initial_k_data_size = atoi (argv[++i]); }
else if (streq (argv [i], "-lkdata")
|| streq (argv [i], "-lkd"))
{ initial_k_data_limit = atoi (argv[++i]); }
else if (((streq (argv [i], "-file")
|| streq (argv [i], "-f"))
&& (i + 1 < argc))
/* Assume this argument is a file name and everything following are
arguments for program */
|| (argv [i][0] != '-'))
{
program_argc = argc - (i + 1);
program_argv = &argv[i + 1]; /* Everything following is argv */
if (!assembly_file_loaded)
{
initialize_world (load_exception_handler ? exception_file_name : NULL);
initialize_run_stack (program_argc, program_argv);
}
assembly_file_loaded |= !read_assembly_file (argv[++i]);
break;
}
else
{
error ("\nUnknown argument: %s (ignored)\n", argv[i]);
print_usage_msg = 1;
}
}
if (print_usage_msg)
{
error ("Usage: spim\n\
-bare Bare machine (no pseudo-ops, delayed branches and loads)\n\
-asm Extended machine (pseudo-ops, no delayed branches and loads) (default)\n\
-delayed_branches Execute delayed branches\n\
-delayed_loads Execute delayed loads\n\
-exception Load exception handler (default)\n\
-noexception Do not load exception handler\n\
-exception_file <file> Specify exception handler in place of default\n\
-quiet Do not print warnings\n\
-noquiet Print warnings (default)\n\
-mapped_io Enable memory-mapped IO\n\
-nomapped_io Do not enable memory-mapped IO (default)\n\
-file <file> <args> Assembly code file and arguments to program\n");
}
if (!assembly_file_loaded)
{
initialize_world (load_exception_handler ? exception_file_name : NULL);
initialize_run_stack (program_argc, program_argv);
top_level ();
}
else /* assembly_file_loaded */
{
console_to_program ();
initialize_run_stack (program_argc, program_argv);
if (!setjmp (spim_top_level_env))
{
char *undefs = undefined_symbol_string ();
if (undefs != NULL)
{
write_output (message_out, "The following symbols are undefined:\n");
write_output (message_out, undefs);
write_output (message_out, "\n");
free (undefs);
}
run_program (find_symbol_address (DEFAULT_RUN_LOCATION),
DEFAULT_RUN_STEPS, 0, 0);
}
console_to_spim ();
}
return (spim_return_value);
}
/* Top-level read-eval-print loop for SPIM. */
static void
top_level ()
{
int redo = 0; /* Non-zero means reexecute last command */
(void)signal (SIGINT, control_c_seen);
while (1)
{
if (!redo)
write_output (message_out, "(spim) ");
if (!setjmp (spim_top_level_env))
redo = parse_spim_command (stdin, redo);
else
redo = 0;
fflush (stdout);
fflush (stderr);
}
}
void
control_c_seen (int arg)
{
console_to_spim ();
write_output (message_out, "\nExecution interrupted\n");
longjmp (spim_top_level_env, 1);
}
/* SPIM commands */
enum {
UNKNOWN_CMD = 0,
EXIT_CMD,
READ_CMD,
RUN_CMD,
STEP_CMD,
PRINT_CMD,
PRINT_SYM_CMD,
PRINT_ALL_REGS_CMD,
REINITIALIZE_CMD,
ASM_CMD,
REDO_CMD,
NOP_CMD,
HELP_CMD,
CONTINUE_CMD,
SET_BKPT_CMD,
DELETE_BKPT_CMD,
LIST_BKPT_CMD,
DUMPNATIVE_TEXT_CMD,
DUMP_TEXT_CMD
};
/* Parse a SPIM command from the FILE and execute it. If REDO is non-zero,
don't read a new command; just rexecute the previous one.
Return non-zero if the command was to redo the previous command. */
static int
parse_spim_command (FILE *file, int redo)
{
static int prev_cmd = NOP_CMD; /* Default redo */
static int prev_token;
int cmd;
initialize_scanner (file);
initialize_parser ("<standard input>");
switch (cmd = (redo ? prev_cmd : read_assembly_command ()))
{
case EXIT_CMD:
console_to_spim ();
exit (0);
case READ_CMD:
{
int token = (redo ? prev_token : read_token ());
if (!redo) flush_to_newline ();
if (token == Y_STR)
{
read_assembly_file ((char *) yylval.p);
initialize_scanner (file); /* Reinitialize! */
}
else
error ("Must supply a filename to read\n");
prev_cmd = READ_CMD;
return (0);
}
case RUN_CMD:
{
static mem_addr addr;
addr = (redo ? addr : get_opt_int ());
if (addr == 0)
addr = starting_address ();
initialize_run_stack (program_argc, program_argv);
console_to_program ();
if (addr != 0)
{
char *undefs = undefined_symbol_string ();
if (undefs != NULL)
{
write_output (message_out, "The following symbols are undefined:\n");
write_output (message_out, undefs);
write_output (message_out, "\n");
free (undefs);
}
if (run_program (addr, DEFAULT_RUN_STEPS, 0, 0))
write_output (message_out, "Breakpoint encountered at 0x%08x\n", PC);
}
console_to_spim ();
prev_cmd = RUN_CMD;
return (0);
}
case CONTINUE_CMD:
{
if (PC != 0)
{
console_to_program ();
if (run_program (PC, DEFAULT_RUN_STEPS, 0, 1))
write_output (message_out, "Breakpoint encountered at 0x%08x\n",
PC);
console_to_spim ();
}
prev_cmd = CONTINUE_CMD;
return (0);
}
case STEP_CMD:
{
static int steps;
mem_addr addr;
steps = (redo ? steps : get_opt_int ());
addr = starting_address ();
if (steps == 0)
steps = 1;
if (addr != 0)
{
console_to_program ();
if (run_program (addr, steps, 1, 1))
write_output (message_out, "Breakpoint encountered at 0x%08x\n",
PC);
console_to_spim ();
}
prev_cmd = STEP_CMD;
return (0);
}
case PRINT_CMD:
{
int token = (redo ? prev_token : read_token ());
static int loc;
if (token == Y_REG)
{
if (redo) loc += 1;
else loc = yylval.i;
print_reg (loc);
}
else if (token == Y_FP_REG)
{
if (redo) loc += 2;
else loc = yylval.i;
print_fp_reg (loc);
}
else if (token == Y_INT)
{
if (redo) loc += 4;
else loc = yylval.i;
print_mem (loc);
}
else if (token == Y_ID)
{
if (!print_reg_from_string ((char *) yylval.p))
{
if (redo) loc += 4;
else loc = find_symbol_address ((char *) yylval.p);
if (loc != 0)
print_mem (loc);
else
error ("Unknown label: %s\n", yylval.p);
}
}
else
error ("Print what?\n");
if (!redo) flush_to_newline ();
prev_cmd = PRINT_CMD;
prev_token = token;
return (0);
}
case PRINT_SYM_CMD:
print_symbols ();
if (!redo) flush_to_newline ();
prev_cmd = NOP_CMD;
return (0);
case PRINT_ALL_REGS_CMD:
{
int hex_flag = 0;
int token = (redo ? prev_token : read_token ());
if (token == Y_ID && streq(yylval.p, "hex"))
hex_flag = 1;
print_all_regs (hex_flag);
if (!redo) flush_to_newline ();
prev_cmd = NOP_CMD;
return (0);
}
case REINITIALIZE_CMD:
flush_to_newline ();
initialize_world (load_exception_handler ? exception_file_name : NULL);
initialize_run_stack (program_argc, program_argv);
write_startup_message ();
prev_cmd = NOP_CMD;
return (0);
case ASM_CMD:
yyparse ();
prev_cmd = ASM_CMD;
return (0);
case REDO_CMD:
return (1);
case NOP_CMD:
prev_cmd = NOP_CMD;
return (0);
case HELP_CMD:
if (!redo) flush_to_newline ();
write_output (message_out, "\nSPIM is a MIPS R2000 simulator.\n");
write_output (message_out, "Its top-level commands are:\n");
write_output (message_out, "exit -- Exit the simulator\n");
write_output (message_out, "quit -- Exit the simulator\n");
write_output (message_out,
"read \"FILE\" -- Read FILE of assembly code into memory\n");
write_output (message_out,
"load \"FILE\" -- Same as read\n");
write_output (message_out,
"run <ADDR> -- Start the program at optional ADDRESS\n");
write_output (message_out,
"step <N> -- Step the program for N instructions\n");
write_output (message_out,
"continue -- Continue program execution without stepping\n");
write_output (message_out, "print $N -- Print register N\n");
write_output (message_out,
"print $fN -- Print floating point register N\n");
write_output (message_out,
"print ADDR -- Print contents of memory at ADDRESS\n");
write_output (message_out,
"print_symbols -- Print all global symbols\n");
write_output (message_out,
"print_all_regs -- Print all MIPS registers\n");
write_output (message_out,
"print_all_regs hex -- Print all MIPS registers in hex\n");
write_output (message_out,
"reinitialize -- Clear the memory and registers\n");
write_output (message_out,
"breakpoint <ADDR> -- Set a breakpoint at address\n");
write_output (message_out,
"delete <ADDR> -- Delete all breakpoints at address\n");
write_output (message_out, "list -- List all breakpoints\n");
write_output (message_out, "dump [ \"FILE\" ] -- Dump binary code to spim.dump or FILE in network byte order\n");
write_output (message_out, "dumpnative [ \"FILE\" ] -- Dump binary code to spim.dump or FILE in host byte order\n");
write_output (message_out,
". -- Rest of line is assembly instruction to put in memory\n");
write_output (message_out, "<cr> -- Newline reexecutes previous command\n");
write_output (message_out, "? -- Print this message\n");
write_output (message_out,
"\nMost commands can be abbreviated to their unique prefix\n");
write_output (message_out, "e.g., ex(it), re(ad), l(oad), ru(n), s(tep), p(rint)\n\n");
prev_cmd = HELP_CMD;
return (0);
case SET_BKPT_CMD:
case DELETE_BKPT_CMD:
{
int token = (redo ? prev_token : read_token ());
static mem_addr addr;
if (!redo) flush_to_newline ();
if (token == Y_INT)
addr = redo ? addr + 4 : (mem_addr)yylval.i;
else if (token == Y_ID)
addr = redo ? addr + 4 : find_symbol_address ((char *) yylval.p);
else
error ("Must supply an address for breakpoint\n");
if (cmd == SET_BKPT_CMD)
add_breakpoint (addr);
else
delete_breakpoint (addr);
prev_cmd = cmd;
return (0);
}
case LIST_BKPT_CMD:
if (!redo) flush_to_newline ();
list_breakpoints ();
prev_cmd = LIST_BKPT_CMD;
return (0);
case DUMPNATIVE_TEXT_CMD:
case DUMP_TEXT_CMD:
{
FILE *fp = NULL;
char *filename = NULL;
int token = (redo ? prev_token : read_token ());
int i;
int words = 0;
int dump_start;
int dump_limit;
if (token == Y_STR)
filename = (char *) yylval.p;
else if (token == Y_NL)
filename = "spim.dump";
else
{
fprintf (stderr, "usage: %s [ \"filename\" ]\n",
(cmd == DUMP_TEXT_CMD ? "dump" : "dumpnative"));
return (0);
}
fp = fopen (filename, "wb");
if (fp == NULL)
{
perror (filename);
return (0);
}
dump_start = find_symbol_address (END_OF_TRAP_HANDLER_SYMBOL);
if (dump_start != 0)
dump_start -= TEXT_BOT;
dump_start = dump_start >> 2;
user_kernel_text_segment (0);
dump_limit = (current_text_pc() - TEXT_BOT) >> 2;
for (i = dump_start; i < dump_limit; i++)
{
int32 code = inst_encode (text_seg[i]);
if (cmd == DUMP_TEXT_CMD)
code = (int32)htonl ((unsigned long)code); /* dump in network byte order */
(void)fwrite (&code, 1, sizeof(code), fp);
words++;
}
fclose (fp);
fprintf (stderr, "Dumped %d words starting at 0x%08x to file %s\n",
words, (unsigned int)((dump_start << 2) + TEXT_BOT), filename);
}
prev_cmd = cmd;
return (0);
default:
while (read_token () != Y_NL) ;
error ("Unknown spim command\n");
return (0);
}
}
/* Read a SPIM command with the scanner and return its ennuemerated
value. */
static int
read_assembly_command ()
{
int token = read_token ();
if (token == Y_NL) /* Blank line means redo */
return (REDO_CMD);
else if (token != Y_ID) /* Better be a string */
return (UNKNOWN_CMD);
else if (str_prefix ((char *) yylval.p, "exit", 2))
return (EXIT_CMD);
else if (str_prefix ((char *) yylval.p, "quit", 2))
return (EXIT_CMD);
else if (str_prefix ((char *) yylval.p, "print", 1))
return (PRINT_CMD);
else if (str_prefix ((char *) yylval.p, "print_symbols", 7))
return (PRINT_SYM_CMD);
else if (str_prefix ((char *) yylval.p, "print_all_regs", 7))
return (PRINT_ALL_REGS_CMD);
else if (str_prefix ((char *) yylval.p, "run", 2))
return (RUN_CMD);
else if (str_prefix ((char *) yylval.p, "read", 2))
return (READ_CMD);
else if (str_prefix ((char *) yylval.p, "load", 2))
return (READ_CMD);
else if (str_prefix ((char *) yylval.p, "reinitialize", 6))
return (REINITIALIZE_CMD);
else if (str_prefix ((char *) yylval.p, "step", 1))
return (STEP_CMD);
else if (str_prefix ((char *) yylval.p, "help", 1))
return (HELP_CMD);
else if (str_prefix ((char *) yylval.p, "continue", 1))
return (CONTINUE_CMD);
else if (str_prefix ((char *) yylval.p, "breakpoint", 2))
return (SET_BKPT_CMD);
else if (str_prefix ((char *) yylval.p, "delete", 1))
return (DELETE_BKPT_CMD);
else if (str_prefix ((char *) yylval.p, "list", 2))
return (LIST_BKPT_CMD);
else if (str_prefix ((char *) yylval.p, "dumpnative", 5))
return (DUMPNATIVE_TEXT_CMD);
else if (str_prefix ((char *) yylval.p, "dump", 4))
return (DUMP_TEXT_CMD);
else if (*(char *) yylval.p == '?')
return (HELP_CMD);
else if (*(char *) yylval.p == '.')
return (ASM_CMD);
else
return (UNKNOWN_CMD);
}
/* Return non-nil if STRING1 is a (proper) prefix of STRING2. */
static int
str_prefix (char *s1, char *s2, int min_match)
{
for ( ; *s1 == *s2 && *s1 != '\0'; s1 ++, s2 ++) min_match --;
return (*s1 == '\0' && min_match <= 0);
}
/* Read and return an integer from the current line of input. If the
line doesn't contain an integer, return 0. In either case, flush the
rest of the line, including the newline. */
static int
get_opt_int ()
{
int token;
if ((token = read_token ()) == Y_INT)
{
flush_to_newline ();
return (yylval.i);
}
else if (token == Y_NL)
return (0);
else
{
flush_to_newline ();
return (0);
}
}
/* Flush the rest of the input line up to and including the next newline. */
static void
flush_to_newline ()
{
while (read_token () != Y_NL) ;
}
/* Print register number N.
Return non-zero if register N was valid register string. */
static int
print_reg (int reg_no)
{
write_output (message_out, "Reg %d = 0x%08x (%d)\n", reg_no, R[reg_no], R[reg_no]);
return (1);
}
static int
print_fp_reg (int reg_no)
{
if ((reg_no & 1) == 0)
write_output (message_out, "FP reg %d = %g (double)\n", reg_no, FPR_D (reg_no));
write_output (message_out, "FP reg %d = %g (single)\n", reg_no, FPR_S (reg_no));
return (1);
}
static int
print_reg_from_string (char* reg_num)
{
char s[100];
char *s1 = s;
/* Conver to lower case */
while (*reg_num != '\0' && s1 - s < 100)
*s1++ = tolower (*reg_num++);
*s1 = '\0';
/* Drop leading $ */
if (s[0] == '$')
s1 = s + 1;
else
s1 = s;
if (streq (s1, "pc"))
write_output (message_out, "PC = 0x%08x (%d)\n", PC, PC);
else if (streq (s1, "hi"))
write_output (message_out, "HI = 0x%08x (%d)\n", HI, HI);
else if (streq (s1, "lo"))
write_output (message_out, "LO = 0x%08x (%d)\n", LO, LO);
else if (streq (s1, "fpcond"))
write_output (message_out, "FCSR = 0x%08x (%d)\n", FCSR, FCSR);
else if (streq (s1, "cause"))
write_output (message_out, "Cause = 0x%08x (%d)\n", CP0_Cause, CP0_Cause);
else if (streq (s1, "epc"))
write_output (message_out, "EPC = 0x%08x (%d)\n", CP0_EPC, CP0_EPC);
else if (streq (s1, "status"))
write_output (message_out, "Status = 0x%08x (%d)\n", CP0_Status, CP0_Status);
else if (streq (s1, "badvaddr"))
write_output (message_out, "BadVAddr = 0x%08x (%d)\n", CP0_BadVAddr, CP0_BadVAddr);
else
return (0);
return (1);
}
static void
print_all_regs (int hex_flag)
{
static str_stream ss;
ss_clear (&ss);
format_registers (&ss, hex_flag, hex_flag);
write_output (message_out, "%s\n", ss_to_string (&ss));
}
/* Print an error message. */
void
error (char *fmt, ...)
{
va_list args;
va_start (args, fmt);
#ifdef NO_VFPRINTF
_doprnt (fmt, args, stderr);
#else
vfprintf (stderr, fmt, args);
#endif
va_end (args);
}
/* Print the error message then exit. */
void
fatal_error (char *fmt, ...)
{
va_list args;
va_start (args, fmt);
fmt = va_arg (args, char *);
#ifdef NO_VFPRINTF
_doprnt (fmt, args, stderr);
#else
vfprintf (stderr, fmt, args);
#endif
exit (-1);
}
/* Print an error message and return to top level. */
void
run_error (char *fmt, ...)
{
va_list args;
va_start (args, fmt);
console_to_spim ();
#ifdef NO_VFPRINTF
_doprnt (fmt, args, stderr);
#else
vfprintf (stderr, fmt, args);
#endif
va_end (args);
longjmp (spim_top_level_env, 1);
}
/* IO facilities: */
void
write_output (port fp, char *fmt, ...)
{
va_list args;
FILE *f;
int restore_console_to_program = 0;
va_start (args, fmt);
f = fp.f;
if (console_state_saved)
{
restore_console_to_program = 1;
console_to_spim ();
}
if (f != 0)
{
#ifdef NO_VFPRINTF
_doprnt (fmt, args, f);
#else
vfprintf (f, fmt, args);
#endif
fflush (f);
}
else
{
#ifdef NO_VFPRINTF
_doprnt (fmt, args, stdout);
#else
vfprintf (stdout, fmt, args);
#endif
fflush (stdout);
}
va_end (args);
if (restore_console_to_program)
console_to_program ();
}
/* Simulate the semantics of fgets (not gets) on Unix file. */
void
read_input (char *str, int str_size)
{
char *ptr;
int restore_console_to_program = 0;
if (console_state_saved)
{
restore_console_to_program = 1;
console_to_spim ();
}
ptr = str;
while (1 < str_size) /* Reserve space for null */
{
char buf[1];
if (read ((int) console_in.i, buf, 1) <= 0) /* Not in raw mode! */
break;
*ptr ++ = buf[0];
str_size -= 1;
if (buf[0] == '\n')
break;
}