/* libc.c -- dummy C library simulation
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/* libc.c -- dummy C library simulation
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Copyright (C) 1999 Damjan Lampret, lampret@opencores.org
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Copyright (C) 1999 Damjan Lampret, lampret@opencores.org
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This file is part of OpenRISC 1000 Architectural Simulator.
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This file is part of OpenRISC 1000 Architectural Simulator.
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This program is free software; you can redistribute it and/or modify
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* Debugger LIBC functions. Working, but VERY, VERY ugly written.
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/* Debugger LIBC functions. Working, but VERY, VERY ugly written.
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I wrote following code when basic simulator started to work and I was
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I wrote following code when basic simulator started to work and I was
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desperate to use some printfs in my debugged code. And it was
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desperate to use some printfs in my debugged code. And it was
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also used to get some output from Dhrystone MIPS benchmark. */
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also used to get some output from Dhrystone MIPS benchmark. */
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#include <stdio.h>
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#include <stdio.h>
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#include <string.h>
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#include <string.h>
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#include <errno.h>
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#include <errno.h>
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#include <stdarg.h>
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#include <stdarg.h>
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#include <abstract.h>
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#include <abstract.h>
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#include <arch.h>
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#include <arch.h>
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/* Length of printf format string */
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/* Length of printf format string */
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#define FMTLEN 2000
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#define FMTLEN 2000
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char fmtstr[FMTLEN];
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char fmtstr[FMTLEN];
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char *simgetstr(unsigned long stackaddr, unsigned long regparam)
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char *simgetstr(unsigned long stackaddr, unsigned long regparam)
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{
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{
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unsigned long fmtaddr;
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unsigned long fmtaddr;
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FILE *f;
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FILE *f;
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int i;
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int i;
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int breakpoint = 0;
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int breakpoint = 0;
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fmtaddr = regparam;
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fmtaddr = regparam;
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i = 0;
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i = 0;
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while (eval_mem8(fmtaddr,&breakpoint) != '\0') {
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while (eval_mem8(fmtaddr,&breakpoint) != '\0') {
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fmtstr[i++] = eval_mem8(fmtaddr,&breakpoint);
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fmtstr[i++] = eval_mem8(fmtaddr,&breakpoint);
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fmtaddr++;
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fmtaddr++;
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if (i == FMTLEN - 1)
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if (i == FMTLEN - 1)
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break;
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break;
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}
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}
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fmtstr[i] = '\0';
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fmtstr[i] = '\0';
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return fmtstr;
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return fmtstr;
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}
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}
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void simprintf(unsigned long stackaddr, unsigned long regparam)
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void simprintf(unsigned long stackaddr, unsigned long regparam)
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{
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{
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unsigned long fmtaddr;
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unsigned long fmtaddr;
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FILE *f;
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FILE *f;
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int i = 0;
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int i = 0;
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int breakpoint = 0;
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int breakpoint = 0;
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simgetstr(stackaddr, regparam);
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simgetstr(stackaddr, regparam);
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debug(6, "simprintf: stackaddr: 0x%.8lx\n", stackaddr);
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debug(6, "simprintf: stackaddr: 0x%.8lx\n", stackaddr);
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if ((f = fopen("stdout.txt", "a+"))) {
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if ((f = fopen("stdout.txt", "a+"))) {
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unsigned long arg;
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unsigned long arg;
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unsigned long argaddr;
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unsigned long argaddr;
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unsigned char regstr[5];
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unsigned char regstr[5];
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char *fmtstrend;
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char *fmtstrend;
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char *fmtstrpart = fmtstr;
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char *fmtstrpart = fmtstr;
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#if STACK_ARGS
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#if STACK_ARGS
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argaddr = stackaddr;
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argaddr = stackaddr;
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#else
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#else
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argaddr = 3;
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argaddr = 3;
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#endif
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#endif
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debug(6, "simprintf: %s\n", fmtstrpart);
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debug(6, "simprintf: %s\n", fmtstrpart);
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while(strlen(fmtstrpart)) {
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while(strlen(fmtstrpart)) {
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debug(6, "simprintf(): 1");
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debug(6, "simprintf(): 1");
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if ((fmtstrend = strstr(fmtstrpart + 1, "%")))
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if ((fmtstrend = strstr(fmtstrpart + 1, "%")))
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*fmtstrend = '\0';
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*fmtstrend = '\0';
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debug(6," 2");
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debug(6," 2");
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if (strstr(fmtstrpart, "%")) {
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if (strstr(fmtstrpart, "%")) {
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debug(6, " 3");
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debug(6, " 3");
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#if STACK_ARGS
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#if STACK_ARGS
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arg = eval_mem32(argaddr,&breakpoint);
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arg = eval_mem32(argaddr,&breakpoint);
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argaddr += 4;
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argaddr += 4;
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#else
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#else
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sprintf(regstr, "r%u", ++argaddr);
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sprintf(regstr, "r%u", ++argaddr);
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arg = eval_reg(regstr);
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arg = eval_reg(regstr);
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#endif
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#endif
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debug(6, " 4: fmtstrpart=%p fmtstrpart=%s arg=%p\n", fmtstrpart, fmtstrpart, arg);
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debug(6, " 4: fmtstrpart=%p fmtstrpart=%s arg=%p\n", fmtstrpart, fmtstrpart, arg);
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if (strncmp(fmtstrpart, "%s", 2) == 0) {
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if (strncmp(fmtstrpart, "%s", 2) == 0) {
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int len = 0;
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int len = 0;
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char *str;
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char *str;
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for(; eval_mem8(arg++,&breakpoint); len++);
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for(; eval_mem8(arg++,&breakpoint); len++);
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len++; /* for null char */
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len++; /* for null char */
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arg -= len;
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arg -= len;
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str = (char *)malloc(len);
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str = (char *)malloc(len);
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len = 0;
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len = 0;
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for(; eval_mem8(arg,&breakpoint); len++)
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for(; eval_mem8(arg,&breakpoint); len++)
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*(str+len) = eval_mem8(arg++,&breakpoint);
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*(str+len) = eval_mem8(arg++,&breakpoint);
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*(str+len) = eval_mem8(arg,&breakpoint); /* null ch */
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*(str+len) = eval_mem8(arg,&breakpoint); /* null ch */
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debug(6, "4a: len=%d str=%s\n", len, str);
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debug(6, "4a: len=%d str=%s\n", len, str);
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debug(6, "4b:");
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debug(6, "4b:");
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fprintf(f, fmtstrpart, str);
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fprintf(f, fmtstrpart, str);
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free(str);
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free(str);
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} else
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} else
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fprintf(f, fmtstrpart, arg);
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fprintf(f, fmtstrpart, arg);
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} else {
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} else {
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debug(6, " 5");
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debug(6, " 5");
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fprintf(f, fmtstrpart);
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fprintf(f, fmtstrpart);
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debug(6, fmtstrpart);
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debug(6, fmtstrpart);
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}
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}
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if (!fmtstrend)
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if (!fmtstrend)
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break;
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break;
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debug(6, " 6");
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debug(6, " 6");
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fmtstrpart = fmtstrend;
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fmtstrpart = fmtstrend;
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*fmtstrpart = '%';
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*fmtstrpart = '%';
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debug(6, " 7");
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debug(6, " 7");
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}
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}
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debug(6," 8\n");
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debug(6," 8\n");
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if (fclose(f))
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if (fclose(f))
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perror(strerror(errno));
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perror(strerror(errno));
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}
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}
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else
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else
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perror(strerror(errno));
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perror(strerror(errno));
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}
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}
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