mirror of
https://github.com/radareorg/radare2.git
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408 lines
12 KiB
C
408 lines
12 KiB
C
/* radare - LGPL - Copyright 2009-2012 // pancake<nopcode.org> */
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/* TODO: simplify using r_write */
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static int cmd_write(void *data, const char *input) {
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ut64 off;
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ut8 *buf;
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const char *arg;
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int wseek, i, size, len = strlen (input);
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char *tmp, *str, *ostr;
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RCore *core = (RCore *)data;
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#define WSEEK(x,y) if(wseek)r_core_seek_delta(x,y)
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wseek = r_config_get_i (core->config, "cfg.wseek");
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str = ostr = strdup (input+1);
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switch (*input) {
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case 'p':
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if (input[1]==' ' && input[2]) {
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r_core_patch (core, input+2);
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} else {
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eprintf ("Usage: wp [rapatch-file]\n"
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"TODO: rapatch format documentation here\n");
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}
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break;
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case 'r':
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off = r_num_math (core->num, input+1);
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len = (int)off;
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if (len>0) {
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buf = malloc (len);
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if (buf != NULL) {
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r_num_irand ();
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for (i=0; i<len; i++)
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buf[i] = r_num_rand (256);
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r_core_write_at (core, core->offset, buf, len);
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WSEEK (core, len);
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free (buf);
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} else eprintf ("Cannot allocate %d bytes\n", len);
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}
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break;
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case 'A':
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switch (input[1]) {
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case ' ':
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if (input[2] && input[3]==' ') {
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r_asm_set_pc (core->assembler, core->offset);
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eprintf ("modify (%c)=%s\n", input[2], input+4);
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len = r_asm_modify (core->assembler, core->block, input[2],
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r_num_math (core->num, input+4));
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eprintf ("len=%d\n", len);
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if (len>0) {
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r_core_write_at (core, core->offset, core->block, len);
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WSEEK (core, len);
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} else eprintf ("r_asm_modify = %d\n", len);
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} else eprintf ("Usage: wA [type] [value]\n");
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break;
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case '?':
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default:
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r_cons_printf ("Usage: wA [type] [value]\n"
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"Types:\n"
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" r raw write value\n"
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" v set value (taking care of current address)\n"
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" d destination register\n"
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" 0 1st src register\n"
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" 1 2nd src register\n"
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"Example: wA r 0 # e800000000\n");
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break;
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}
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break;
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case 'c':
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switch (input[1]) {
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case 'i':
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r_io_cache_commit (core->io);
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r_core_block_read (core, 0);
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break;
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case 'r':
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r_io_cache_reset (core->io, R_TRUE);
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/* Before loading the core block we have to make sure that if
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* the cache wrote past the original EOF these changes are no
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* longer displayed. */
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memset (core->block, 0xff, core->blocksize);
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r_core_block_read (core, 0);
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break;
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case '-':
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if (input[2]=='*') {
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r_io_cache_reset (core->io, R_TRUE);
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} else if (input[2]==' ') {
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char *p = strchr (input+3, ' ');
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ut64 to, from = core->offset;
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if (p) {
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*p = 0;
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from = r_num_math (core->num, input+3);
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to = r_num_math (core->num, input+3);
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if (to<from) {
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eprintf ("Invalid range (from>to)\n");
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return 0;
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}
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} else {
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from = r_num_math (core->num, input+3);
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to = from + core->blocksize;
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}
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r_io_cache_invalidate (core->io, from, to);
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} else {
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eprintf ("Invalidate write cache at 0x%08"PFMT64x"\n", core->offset);
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r_io_cache_invalidate (core->io, core->offset, core->offset+core->blocksize);
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}
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/* See 'r' above. */
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memset (core->block, 0xff, core->blocksize);
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r_core_block_read (core, 0);
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break;
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case '?':
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r_cons_printf (
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"Usage: wc[ir*?]\n"
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" wc list all write changes\n"
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" wc- [a] [b] remove write op at curseek or given addr\n"
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" wc* \"\" in radare commands\n"
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" wcr reset all write changes in cache\n"
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" wci commit write cache\n"
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"NOTE: Requires 'e io.cache=true'\n");
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break;
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case '*':
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r_io_cache_list (core->io, R_TRUE);
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break;
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case '\0':
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r_io_cache_list (core->io, R_FALSE);
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break;
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}
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break;
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case ' ':
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/* write string */
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len = r_str_escape (str);
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r_core_write_at (core, core->offset, (const ut8*)str, len);
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#if 0
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r_io_set_fd (core->io, core->file->fd);
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r_io_write_at (core->io, core->offset, (const ut8*)str, len);
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#endif
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WSEEK (core, len);
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r_core_block_read (core, 0);
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break;
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case 't':
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if (*str != ' ') {
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eprintf ("Usage: wt file [off]\n");
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} else {
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tmp = strchr (str+1, ' ');
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if (tmp) {
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st64 sz = (st64) r_num_math (core->num, tmp+1);
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*tmp = 0;
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if (sz<1) eprintf ("Invalid length\n");
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else r_core_dump (core, str+1, core->offset, (ut64)sz);
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} else r_file_dump (str+1, core->block, core->blocksize);
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}
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break;
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case 'T':
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eprintf ("TODO: wT // why?\n");
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break;
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case 'f':
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arg = (const char *)(input+((input[1]==' ')?2:1));
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if ((buf = (ut8*) r_file_slurp (arg, &size))) {
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r_io_set_fd (core->io, core->file->fd);
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r_io_write_at (core->io, core->offset, buf, size);
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WSEEK (core, size);
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free(buf);
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r_core_block_read (core, 0);
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} else eprintf ("Cannot open file '%s'\n", arg);
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break;
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case 'F':
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arg = (const char *)(input+((input[1]==' ')?2:1));
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if ((buf = r_file_slurp_hexpairs (arg, &size))) {
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r_io_set_fd (core->io, core->file->fd);
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r_io_write_at (core->io, core->offset, buf, size);
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WSEEK (core, size);
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free (buf);
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r_core_block_read (core, 0);
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} else eprintf ("Cannot open file '%s'\n", arg);
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break;
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case 'w':
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str++;
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len = (len-1)<<1;
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if (len>0) tmp = malloc (len+1);
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else tmp = NULL;
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if (tmp) {
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for (i=0; i<len; i++) {
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if (i%2) tmp[i] = 0;
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else tmp[i] = str[i>>1];
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}
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str = tmp;
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r_io_set_fd (core->io, core->file->fd);
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r_io_write_at (core->io, core->offset, (const ut8*)str, len);
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WSEEK (core, len);
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r_core_block_read (core, 0);
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free (tmp);
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} else eprintf ("Cannot malloc %d\n", len);
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break;
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case 'x':
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{
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int len = strlen (input);
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ut8 *buf = malloc (len+1);
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len = r_hex_str2bin (input+1, buf);
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if (len != -1) {
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r_core_write_at (core, core->offset, buf, len);
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WSEEK (core, len);
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r_core_block_read (core, 0);
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} else eprintf ("Error: invalid hexpair string\n");
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free (buf);
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}
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break;
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case 'a':
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switch (input[1]) {
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case 'o':
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if (input[2] == ' ')
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r_core_hack (core, input+3);
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else r_core_hack_help (core);
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break;
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case ' ':
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case '*':
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{ const char *file = input[1]=='*'? input+2: input+1;
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RAsmCode *acode;
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r_asm_set_pc (core->assembler, core->offset);
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acode = r_asm_massemble (core->assembler, file);
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if (acode) {
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if (input[1]=='*') {
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r_cons_printf ("wx %s\n", acode->buf_hex);
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} else {
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if (r_config_get_i (core->config, "scr.prompt"))
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eprintf ("Written %d bytes (%s)=wx %s\n", acode->len, input+1, acode->buf_hex);
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r_core_write_at (core, core->offset, acode->buf, acode->len);
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WSEEK (core, acode->len);
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r_core_block_read (core, 0);
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}
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r_asm_code_free (acode);
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}
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} break;
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case 'f':
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if ((input[2]==' '||input[2]=='*')) {
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const char *file = input[2]=='*'? input+4: input+3;
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RAsmCode *acode;
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r_asm_set_pc (core->assembler, core->offset);
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acode = r_asm_assemble_file (core->assembler, file);
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if (acode) {
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if (input[2]=='*') {
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r_cons_printf ("wx %s\n", acode->buf_hex);
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} else {
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if (r_config_get_i (core->config, "scr.prompt"))
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eprintf ("Written %d bytes (%s)=wx %s\n", acode->len, input+1, acode->buf_hex);
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r_core_write_at (core, core->offset, acode->buf, acode->len);
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WSEEK (core, acode->len);
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r_core_block_read (core, 0);
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}
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r_asm_code_free (acode);
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} else eprintf ("Cannot assemble file\n");
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} else eprintf ("Wrong argument\n");
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break;
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default:
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eprintf ("Usage: wa[of*] [arg]\n"
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" wa nop : write nopcode using asm.arch and asm.bits\n"
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" wa* mov eax, 33 : show 'wx' op with hexpair bytes of sassembled opcode\n"
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" \"wa nop;nop\" : assemble more than one instruction (note the quotes)\n"
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" waf foo.asm : assemble file and write bytes\n"
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" wao nop : convert current opcode into nops\n"
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" wao? : show help for assembler operation on current opcode (hack)\n");
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break;
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}
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break;
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case 'b':
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{
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int len = strlen (input);
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ut8 *buf = malloc (len+1);
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if (buf) {
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len = r_hex_str2bin (input+1, buf);
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if (len > 0) {
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r_mem_copyloop (core->block, buf, core->blocksize, len);
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r_core_write_at (core, core->offset, core->block, core->blocksize);
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WSEEK (core, core->blocksize);
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r_core_block_read (core, 0);
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} else eprintf ("Wrong argument\n");
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} else eprintf ("Cannot malloc %d\n", len+1);
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}
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break;
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case 'm':
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size = r_hex_str2bin (input+1, (ut8*)str);
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switch (input[1]) {
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case '\0':
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eprintf ("Current write mask: TODO\n");
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// TODO
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break;
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case '?':
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break;
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case '-':
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r_io_set_write_mask(core->io, 0, 0);
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eprintf ("Write mask disabled\n");
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break;
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case ' ':
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if (size>0) {
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r_io_set_fd (core->io, core->file->fd);
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r_io_set_write_mask (core->io, (const ut8*)str, size);
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WSEEK (core, size);
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eprintf ("Write mask set to '");
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for (i=0; i<size; i++)
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eprintf ("%02x", str[i]);
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eprintf ("'\n");
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} else eprintf ("Invalid string\n");
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break;
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}
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break;
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case 'v':
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off = r_num_math (core->num, input+1);
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r_io_set_fd (core->io, core->file->fd);
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r_io_seek (core->io, core->offset, R_IO_SEEK_SET);
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if (off&UT64_32U) {
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/* 8 byte addr */
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ut64 addr8;
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memcpy((ut8*)&addr8, (ut8*)&off, 8); // XXX needs endian here
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// endian_memcpy((ut8*)&addr8, (ut8*)&off, 8);
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r_io_write(core->io, (const ut8 *)&addr8, 8);
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WSEEK (core, 8);
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} else {
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/* 4 byte addr */
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ut32 addr4, addr4_ = (ut32)off;
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//drop_endian((ut8*)&addr4_, (ut8*)&addr4, 4); /* addr4_ = addr4 */
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//endian_memcpy((ut8*)&addr4, (ut8*)&addr4_, 4); /* addr4 = addr4_ */
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memcpy ((ut8*)&addr4, (ut8*)&addr4_, 4); // XXX needs endian here too
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r_io_write (core->io, (const ut8 *)&addr4, 4);
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WSEEK (core, 4);
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}
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r_core_block_read (core, 0);
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break;
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case 'o':
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switch (input[1]) {
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case 'a':
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case 's':
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case 'A':
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case 'x':
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case 'r':
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case 'l':
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case 'm':
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case 'd':
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case 'o':
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if (input[2]!=' ') {
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r_cons_printf ("Usage: 'wo%c 00 11 22'\n", input[1]);
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return 0;
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}
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case '2':
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case '4':
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r_core_write_op (core, input+3, input[1]);
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r_core_block_read (core, 0);
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break;
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case 'n':
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r_core_write_op (core, "ff", 'x');
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r_core_block_read (core, 0);
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break;
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case '\0':
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case '?':
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default:
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r_cons_printf (
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"Usage: wo[asmdxoArl24] [hexpairs] @ addr[:bsize]\n"
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"Example:\n"
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" wox 0x90 ; xor cur block with 0x90\n"
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" wox 90 ; xor cur block with 0x90\n"
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" wox 0x0203 ; xor cur block with 0203\n"
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" woa 02 03 ; add [0203][0203][...] to curblk\n"
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"Supported operations:\n"
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" woa += addition\n"
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" wos -= substraction\n"
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" wom *= multiply\n"
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" wod /= divide\n"
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" wox ^= xor\n"
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" woo |= or\n"
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" woA &= and\n"
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" wor >>= shift right\n"
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" wol <<= shift left\n"
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" wo2 2= 2 byte endian swap\n"
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" wo4 4= 4 byte endian swap\n"
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);
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break;
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}
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break;
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default:
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case '?':
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if (core->oobi) {
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eprintf ("Writing oobi buffer!\n");
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r_io_set_fd (core->io, core->file->fd);
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r_io_write (core->io, core->oobi, core->oobi_len);
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WSEEK (core, core->oobi_len);
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r_core_block_read (core, 0);
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} else r_cons_printf (
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"Usage: w[x] [str] [<file] [<<EOF] [@addr]\n"
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" w foobar write string 'foobar'\n"
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" wr 10 write 10 random bytes\n"
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" ww foobar write wide string 'f\\x00o\\x00o\\x00b\\x00a\\x00r\\x00'\n"
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" wa push ebp write opcode, separated by ';' (use '\"' around the command)\n"
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" waf file assemble file and write bytes\n"
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" wA r 0 alter/modify opcode at current seek (see wA?)\n"
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" wb 010203 fill current block with cyclic hexpairs\n"
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" wc[ir*?] write cache commit/reset/list\n"
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" wx 9090 write two intel nops\n"
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" wv eip+34 write 32-64 bit value\n"
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" wo? hex write in block with operation. 'wo?' fmi\n"
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" wm f0ff set binary mask hexpair to be used as cyclic write mask\n"
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" wf file write contents of file at current offset\n"
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" wF file write contents of hexpairs file here\n"
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" wt file write current block to file\n"
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" wp file apply radare patch file. See wp? fmi\n");
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//TODO: add support for offset+seek
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// " wf file o s ; write contents of file from optional offset 'o' and size 's'.\n"
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break;
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}
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free (ostr);
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return 0;
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}
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