radare2/libr/core/cmd_flag.c

/* radare - LGPL - Copyright 2009-2014 - pancake */

static void flagbars(RCore *core) {
	int total = 0;
	int cols = r_cons_get_size (NULL);
	RListIter *iter;
	RFlagItem *flag;
	r_list_foreach (core->flags->flags, iter, flag) {
		total += flag->offset;
	}
	if (!total) // avoid a division by zero
		return;
	r_list_foreach (core->flags->flags, iter, flag) {
		ut32 pbar_val = flag->offset>0 ? flag->offset : 1;
		r_cons_printf ("%10s", flag->name);
		r_print_progressbar (core->print,
			(pbar_val*100)/total, cols);
		r_cons_newline ();
	}
}

static int cmd_flag(void *data, const char *input) {
	RCore *core = (RCore *)data;
	ut64 off = core->offset;
	char *ptr, *str = NULL;
	char *name = NULL;
	st64 base;

	// TODO: off+=cursor
	if (*input)
		str = strdup (input+1);
	switch (*input) {
	case '=':
		flagbars (core);
		break;
	case 'a':
		if (input[1]==' '){
			RFlagItem *fi;
			str = strdup (input+2);
			ptr = strchr (str, '=');
			if (!ptr)
				ptr = strchr (str, ' ');
			if (ptr) *ptr++ = 0;
			name = (char *)r_str_chop_ro (str);
			ptr = (char *)r_str_chop_ro (ptr);
			fi = r_flag_get (core->flags, name);
			if (!fi)
				fi = r_flag_set (core->flags, name,
					core->offset, 1, 0);
			if (fi) {
				r_flag_item_set_alias (fi, ptr);
			} else {
				eprintf ("Cannot find flag '%s'\n", name);
			}
		} else {
			eprintf ("Usage: fa flagname flagalias\n");
		}
		break;
	case 'm':
		r_flag_move (core->flags, core->offset, r_num_math (core->num, input+1));
		break;
	case '2':
		r_flag_get_i2 (core->flags, r_num_math (core->num, input+1));
		break;
	case 'R':
		{
		char *p = strchr (str+1, ' ');
		ut64 from, to, mask = 0xffff;
		int ret;
		if (p) {
			char *q = strchr (p+1, ' ');
			*p = 0;
			if (q) {
				*q = 0;
				mask = r_num_math (core->num, q+1);
			}
			from = r_num_math (core->num, str+1);
			to = r_num_math (core->num, p+1);
			ret = r_flag_relocate (core->flags, from, mask, to);
			eprintf ("Relocated %d flags\n", ret);
		} else {
			eprintf ("Usage: fR [from] [to] ([mask])\n");
			eprintf ("Example to relocate PIE flags on debugger:\n"
				" > fR entry0 `dm~:1[1]`\n");
		}
		}
		break;
	case 'b':
		switch (input[1]) {
		case ' ':
			free(str);
			str = strdup (input+2);
			ptr = strchr (str, ' ');
			if (ptr) {
				RListIter *iter;
				RFlagItem *flag;
				RFlag *f = core->flags;
				*ptr = 0;
				base = r_num_math (core->num, str);
				r_list_foreach (f->flags, iter, flag) {
					if (r_str_glob (flag->name, ptr+1))
						flag->offset += base;
				}
			} else core->flags->base = r_num_math (core->num, input+1);
			free (str);
			str = NULL;
			break;
		case '\0':
			r_cons_printf ("%"PFMT64d" 0x%"PFMT64x"\n",
				core->flags->base,
				core->flags->base);
			break;
		default:
			eprintf ("Usage: fb [addr] [[flags*]]\n");
			break;
		}
		break;
	case '+':
	case ' ': {
		char *s = strchr (str, ' '), *s2 = NULL, *eq = strchr (str, '=');
		ut32 bsze = 1; //core->blocksize;
		if (eq) {
			// TODO: add support for '=' char in flag comments
			*eq = 0;
			off = r_num_math (core->num, eq+1);
		}
		s = strchr (str, ' ');
		if (s) {
			*s = '\0';
			s2 = strchr (s+1, ' ');
			if (s2) {
				*s2 = '\0';
				if (s2[1]&&s2[2])
					off = r_num_math (core->num, s2+1);
			}
			bsze = r_num_math (core->num, s+1);
		}
		if (*str == '.') {
			RAnalFunction *fcn = r_anal_fcn_find (core->anal, off, 0);
			if (fcn) r_anal_fcn_var_add (core->anal, fcn->addr, 0, 'v', off, "int", str+1);
			else eprintf ("Cannot find function at 0x%08"PFMT64x"\n", off);
		} else r_flag_set (core->flags, str, off, bsze, (*input=='+'));
		}
		break;
	case '-':
		if (input[1]) {
			const char *flagname = input+1;
			while (*flagname==' ') flagname++;
			if (*flagname=='.') {
				RAnalFunction *fcn = r_anal_fcn_find (core->anal, off, 0);
				if (fcn) eprintf ("TODO: local_del_name has been deprecated\n");
				//;r_anal_fcn_local_del_name (core->anal, fcn, flagname+1);
				else eprintf ("Cannot find function at 0x%08"PFMT64x"\n", off);
			} else {
				if (strchr (flagname, '*'))
					r_flag_unset_glob (core->flags, flagname);
				else r_flag_unset (core->flags, flagname, NULL);
			}
		} else r_flag_unset_i (core->flags, off, NULL);
		break;
	case '.':
		if (input[1]) {
			if (input[1] == '*') {
				if (input[2] == '*') {
					r_core_anal_fcn_local_list (core, NULL, 1);
				} else {
					RAnalFunction *fcn = r_anal_fcn_find (core->anal, off, 0);
					if (fcn) r_core_anal_fcn_local_list (core, fcn, 1);
					else eprintf ("Cannot find function at 0x%08"PFMT64x"\n", off);
				}
			} else {
				const char *name = input+((input[2]==' ')? 2:1);
				RAnalFunction *fcn = r_anal_fcn_find (core->anal, off, 0);
				if (fcn) {
					if (*name=='-') {
						//r_anal_fcn_local_del_name (core->anal, fcn, name+1);
						r_anal_fcn_var_del_bydelta (core->anal, fcn->addr,
							0, R_ANAL_FCN_VARKIND_LOCAL, r_num_math (NULL, name+1));
					} else {
						r_anal_fcn_var_add (core->anal, fcn->addr,
							0, R_ANAL_FCN_VARKIND_LOCAL, off, "int", name);
					}
				} else eprintf ("Cannot find function at 0x%08"PFMT64x"\n", off);
			}
		} else {
			RAnalFunction *fcn = r_anal_fcn_find (core->anal, off, 0);
			if (fcn) r_core_anal_fcn_local_list (core, fcn, 0);
			else eprintf ("Cannot find function at 0x%08"PFMT64x"\n", off);
		}
		break;
	case 'l':
		if (input[1] == ' ') {
			RFlagItem *item = r_flag_get_i (core->flags,
				r_num_math (core->num, input+2));
			if (item)
				r_cons_printf ("0x%08"PFMT64x"\n", item->offset);
		} else eprintf ("Missing arguments\n");
		break;
#if 0
	case 'd':
		if (input[1] == ' ') {
			char cmd[128];
			RFlagItem *item = r_flag_get_i (core->flags,
				r_num_math (core->num, input+2));
			if (item) {
				r_cons_printf ("0x%08"PFMT64x"\n", item->offset);
				snprintf (cmd, sizeof (cmd), "pD@%"PFMT64d":%"PFMT64d,
					 item->offset, item->size);
				r_core_cmd0 (core, cmd);
			}
		} else eprintf ("Missing arguments\n");
		break;
#endif
	case 'x':
		if (input[1] == ' ') {
			char cmd[128];
			RFlagItem *item = r_flag_get_i (core->flags,
				r_num_math (core->num, input+2));
			if (item) {
				r_cons_printf ("0x%08"PFMT64x"\n", item->offset);
				snprintf (cmd, sizeof (cmd), "px@%"PFMT64d":%"PFMT64d,
					 item->offset, item->size);
				r_core_cmd0 (core, cmd);
			}
		} else eprintf ("Missing arguments\n");
		break;
	case 'S':
		r_flag_sort (core->flags, (input[1]=='n'));
		break;
	case 's':
		switch (input[1]) {
		case 'r':
			if (input[2]==' ')
				r_flag_space_rename (core->flags, NULL, input+2);
			else eprintf ("Usage: fsr [newname]\n");
			break;
		case 'j':
		case '\0':
		case '*':
			r_flag_space_list (core->flags, input[1]);
			break;
		case ' ':
			r_flag_space_set (core->flags, input+2);
			break;
		case 'm':
			{ RFlagItem *f;
			ut64 off = core->offset;
			if (input[2] == ' ')
				off = r_num_math (core->num, input+2);
			f = r_flag_get_i (core->flags, off);
			if (f) {
				f->space = core->flags->space_idx;
			} else eprintf ("Cannot find any flag at 0x%"PFMT64x".\n", off);
			}
			break;
		default: {
			int i, j = 0;
			for (i=0; i<R_FLAG_SPACES_MAX; i++) {
				if (core->flags->spaces[i])
					r_cons_printf ("%02d %c %s\n", j++,
					(i==core->flags->space_idx)?'*':' ',
					core->flags->spaces[i]);
			}
			} break;
		}
		break;
	case 'g':
		r_core_cmd0 (core, "V");
		break;
	case 'c':
		if (input[1]=='?') {
			const char *help_msg[] = {
			"Usage: fc", "<flagname> [color]", " # List colors with 'ecs'",
			"fc", " flagname", "Get current color for given flagname",
			"fc", " flagname color", "Set color to a flag",
			NULL
			};
			r_core_cmd_help (core, help_msg);
		} else {
			RFlagItem *fi;
			const char *ret;
			char *arg = r_str_chop (strdup (input+2));
			char *color = strchr (arg, ' ');
			if (color && color[1])
				*color++ = 0;
			fi = r_flag_get (core->flags, arg);
			if (fi) {
				ret = r_flag_color (core->flags, fi, color);
				if (!color && ret)
					r_cons_printf ("%s\n", ret);
			} else {
				eprintf ("Unknown flag '%s'\n", arg);
			}
			free (arg);
		}
		break;
	case 'C':
		if (input[1]==' ') {
			RFlagItem *item;
			char *q, *p = strdup (input+2);
			q = strchr (p, ' ');
			if (q) {
				*q = 0;
				item = r_flag_get (core->flags, p);
				if (item) {
					r_flag_item_set_comment (item, q+1);
				} else eprintf ("Cannot find flag with name '%s'\n", p);
			} else {
				item = r_flag_get_i (core->flags, r_num_math (core->num, p));
				if (item && item->comment) {
					r_cons_printf ("%s\n", item->comment);
				} else eprintf ("Cannot find item\n");
			}
			free (p);
		} else eprintf ("Usage: fC [name] [comment]\n");
		break;
	case 'o':
		{ // TODO: use file.fortunes // can be dangerous in sandbox mode
			char *file = R2_PREFIX"/share/doc/radare2/fortunes";
			char *line = r_file_slurp_random_line (file);
			if (line) {
				r_cons_printf (" -- %s\n", line);
				free (line);
			}
		}
		break;
	case 'r':
		if (input[1]==' ' && input[2]) {
			char *old, *new;
			RFlagItem *item;
			old = str+1;
			new = strchr (old, ' ');
			if (new) {
				*new = 0;
				new++;
				item = r_flag_get (core->flags, old);
			} else {
				new = old;
				item = r_flag_get_i (core->flags, core->offset);
			}
			if (item) {
				if (!r_flag_rename (core->flags, item, new))
					eprintf ("Invalid name\n");
			} else eprintf ("Cannot find flag\n");
		}
		break;
	case '*':
	case '\0':
	case 'j':
		r_flag_list (core->flags, *input);
		break;
	case 'd':
		{
			ut64 addr = 0;
			RFlagItem *f = NULL;
			switch (input[1]) {
			case '?':
				eprintf ("Usage: fd [offset|flag|expression]\n");
				if (str)
					free (str);
				return R_FALSE;
			case '\0':
				addr = core->offset;
				break;
			default:
				addr = r_num_math (core->num, input+2);
				break;
			}
			f = r_flag_get_at (core->flags, addr);
			if (f) {
				if (f->offset != addr) {
					r_cons_printf ("%s + %d\n", f->name, (int)(addr-f->offset));
				} else r_cons_printf ("%s\n", f->name);
			}
		}
		break;
	case '?':
{
		const char *help_msg[] = {
		"Usage: f","[?] [flagname]", " # Manage offset-name flags",
		"f","","list flags",
		"f."," [*[*]]","list local per-function flags (*) as r2 commands",
		"f.","blah=$$+12","set local function label named 'blah'",
		"f*","","list flags in r commands",
		"f"," name 12 @ 33","set flag 'name' with length 12 at offset 33",
		"f"," name = 33","alias for 'f name @ 33' or 'f name 1 33'",
		"f"," name 12 33 [cmt]","same as above + optional comment",
		"f-",".blah@fcn.foo","delete local label from function at current seek (also f.-)",
		"f+","name 12 @ 33","like above but creates new one if doesnt exist",
		"f-","name","remove flag 'name'",
		"f-","@addr","remove flag at address expression",
		"f."," fname","list all local labels for the given function",
		"fa"," [name] [alias]","alias a flag to evaluate an expression",
		"fb"," [addr]","set base address for new flags",
		"fb"," [addr] [flag*]","move flags matching 'flag' to relative addr",
		"fC"," [name] [cmt]","set comment for given flag",
		"fd"," addr","return flag+delta",
		"fj","","list flags in JSON format",
		"fl"," [flagname]","show flag length (size)",
		"fm"," addr","move flag at current offset to new address",
		"fo","","show fortunes",
		//" fc [name] [cmt]  ; set execution command for a specific flag"
		"fr"," [old] [[new]]","rename flag (if no new flag current seek one is used)",
		"fR"," [f] [t] [m]","relocate all flags matching f&~m 'f'rom, 't'o, 'm'ask",
		"fs","","display flagspaces",
		"fs"," *","set all flagspace",
		"fs"," sections","set flagspace (f will only list flags from selected ones)",
		"fsr"," newname","set flagspace (f will only list flags from selected ones)",
		"fsm"," [addr]","move flags at given address to the current flagspace",
		"fS","[on]","sort flags by offset or name",
		"fx","[d]","show hexdump (or disasm) of flag:flagsize",
		NULL};
		r_core_cmd_help (core, help_msg);
}
		break;
	}
	if (str)
		free (str);
	return 0;
}