radare2/libr/core/cmd_section.c

/* radare - LGPL - Copyright 2009-2017 - pancake */

#include "r_cons.h"
#include "r_core.h"
#include "r_types.h"
#include "r_io.h"

static bool dumpSectionsToDisk(RCore *core) {
	char file[512];
	RListIter *iter;
	RIOSection *s;

	r_list_foreach (core->io->sections, iter, s) {
		ut8 *buf = malloc (s->size);
		r_io_read_at (core->io, s->paddr, buf, s->size);
		snprintf (file, sizeof (file),
			"0x%08"PFMT64x"-0x%08"PFMT64x"-%s.dmp",
			s->vaddr, s->vaddr+s->size,
			r_str_rwx_i (s->flags));
		if (!r_file_dump (file, buf, s->size, 0)) {
			eprintf ("Cannot write '%s'\n", file);
			free (buf);
			return false;
		}
		eprintf ("Dumped %d bytes into %s\n", (int)s->size, file);
		free (buf);
	}
	return true;
}

static bool dumpSectionToDisk(RCore *core, char *file) {
	char *heapfile = NULL;
	RListIter *iter;
	RIOSection *s;
	int len = 128;
	if (!core || !file) {
		return false;
	}
	ut64 o = core->offset;
	if (core->io->va || core->io->debug) {
		o = r_io_section_vaddr_to_maddr_try (core->io, o);
	}
	r_list_foreach (core->io->sections, iter, s) {
		if (o >= s->paddr && o < s->paddr + s->size) {
			ut8 *buf = malloc (s->size);
			r_io_read_at (core->io, s->paddr, buf, s->size);
			if (!file) {
				heapfile = (char *)malloc (len);
				if (!heapfile) {
					free (buf);
					return false;
				}
				file = heapfile;
				snprintf (file, len,
					"0x%08"PFMT64x"-0x%08"PFMT64x"-%s.dmp",
					s->vaddr, s->vaddr + s->size,
					r_str_rwx_i (s->flags));
			}
			if (!r_file_dump (file, buf, s->size, 0)) {
				eprintf ("Cannot write '%s'\n", file);
				free (buf);
				free (heapfile);
				return false;
			}
			eprintf ("Dumped %d bytes into %s\n", (int)s->size, file);
			free (buf);
			free (heapfile);
			return true;
		}
	}
	return false;
}

static void update_section_flag_at_with_oldname(RIOSection *s, RFlag *flags, ut64 off, char *oldname) {
	RFlagItem *item = NULL;
	RListIter *iter;
	const RList *list = NULL;
	int len = 0;
	char *secname = NULL;
	list = r_flag_get_list (flags, s->vaddr);
	secname = sdb_fmt (-1, "section.%s", oldname);
	len = strlen (secname);
	r_list_foreach (list, iter, item) {
		if (!item->name)  {
			continue;
		}
		if (!strncmp (item->name, secname, R_MIN (strlen (item->name), len))) {
			free (item->realname);
			item->name = strdup (sdb_fmt (-1, "section.%s", s->name));
			r_str_chop (item->name);
			r_name_filter (item->name, 0);
			item->realname = item->name;
			break;
		}
	}
	list = r_flag_get_list (flags, s->vaddr + s->size);
	secname = sdb_fmt (-1, "section_end.%s", oldname);
	len = strlen (secname);
	r_list_foreach (list, iter, item) {
		if (!item->name)  {
			continue;
		}
		if (!strncmp (item->name, secname, R_MIN (strlen (item->name), len))) {
			free (item->realname);
			item->name = strdup (sdb_fmt (-1, "section_end.%s", s->name));
			r_str_chop (item->name);
			r_name_filter (item->name, 0);
			item->realname = item->name;
			break;
		}
	}
}

static int cmd_section(void *data, const char *input) {
	RCore *core = (RCore *)data;
	const char* help_msg[] = {
		"Usage:","S[?-.*=adlr] [...]","",
		"S","","list sections",
		"S.","","show current section name",
		"S*","","list sections (in radare commands)",
		"S=","","list sections (ascii-art bars) (io.va to display paddr or vaddr)",
		"Sa","[-] [A] [B] [[off]]","Specify arch and bits for given section",
		"Sd[a]"," [file]","dump current (all) section to a file (see dmd)",
		"Sl"," [file]","load contents of file into current section (see dml)",
		"Sf"," [baddr]","Alias for S 0 0 $s $s foo mrwx",
		"Sj","","list sections in JSON (alias for iSj)",
		"Sr"," [name]","rename section on current seek",
		"S"," off va sz vsz name mrwx","add new section (if(!vsz)vsz=sz)",
		"S-[id]","","remove section identified by id",
		"S-.","","remove section at core->offset (can be changed with @)",
		"S.-*","","remove all sections in current offset",
		NULL
	};
	switch (*input) {
	case '?':
		r_core_cmd_help (core, help_msg);
// TODO: add command to resize current section
		break;
	case 'f': // "Sf"
		if (input[1] == ' ') {
			ut64 n = r_num_math (core->num, input + 1);
			r_core_cmdf (core, "S 0x%"PFMT64x" 0x%"PFMT64x" $s $s foo mrwx", n, n);
		} else {
			r_core_cmd0 (core, "S 0 0 $s $s foo mrwx");
		}
		break;
	case 'j': // "Sj"
		r_core_cmd0 (core, "iSj");
		break;
	case 'a': // "Sa"
		switch (input[1]) {
		case '\0':
			{
			int b = 0;
			const char *n = r_io_section_get_archbits (core->io, core->offset, &b);
			if (n) {
				r_cons_printf ("%s %d\n", n, b);
			}
			}
			break;
		case '-':
			r_io_section_set_archbits (core->io, core->offset, NULL, 0);
			break;
		case '?':
		default:
			eprintf ("Usage: Sa[-][arch] [bits] [[off]]\n");
			break;
		case ' ':
			{
				int i;
				char *ptr = strdup (input+2);
				const char *arch = NULL;
				char bits = 0;
				ut64 offset = core->offset;
				i = r_str_word_set0 (ptr);
				if (i < 2) {
					eprintf ("Missing argument\n");
					free (ptr);
					break;
				}
				if (i == 3) {
					offset = r_num_math (core->num, r_str_word_get0 (ptr, 2));
				}
				bits = r_num_math (core->num, r_str_word_get0 (ptr, 1));
				arch = r_str_word_get0 (ptr, 0);
				if (r_io_section_set_archbits (core->io, offset, arch, bits)) {
					core->section = NULL;
					r_core_seek (core, core->offset, 0);
				} else {
					eprintf ("Cannot set arch/bits at 0x%08"PFMT64x"\n",offset);
				}
				free (ptr);
				break;
			}
		}
		break;
	case 'r':
		if (input[1] == ' ') {
			RIOSection *s;
			// int len = 0;
			ut64 vaddr;
			char *p = strchr (input + 2, ' ');
			if (p) {
				*p = 0;
				vaddr = r_num_math (core->num, p + 1);
			//	len = (int)(size_t)(p-input + 2);
			} else {
				vaddr = core->offset;
			}
			s = r_io_section_vget (core->io, vaddr);
			if (s) {
				char *oldname = s->name;
				s->name = strdup (input + 2);
				//update flag space for the given section
				update_section_flag_at_with_oldname (s, core->flags, s->vaddr, oldname);
				free (oldname);
			} else {
				eprintf ("No section found in  0x%08"PFMT64x"\n", core->offset);
			}
		} else {
			eprintf ("Usage: Sr [name] ([offset])\n");
		}
		break;
	case 'd':
		{
		char *file = NULL;
		int len = 128;
		switch (input[1]) {
		case 0:
			(void) dumpSectionToDisk (core, NULL);
			break;
		case ' ':
			if (input[2]) {
				file = (char *)calloc (len, sizeof (char));
				if (file) {
					snprintf (file, len, "%s", input + 2);
				}
			}
			(void) dumpSectionToDisk (core, file);
			free (file);
			break;
		case 'a':
			(void)dumpSectionsToDisk (core);
			break;
		}
		}
		break;
	case 'l':
		{
		ut64 o = core->offset;
		RListIter *iter;
		RIOSection *s;
		if (input[1] != ' ') {
			eprintf ("Usage: Sl [file]\n");
			return false;
		}
		if (core->io->va || core->io->debug) {
			o = r_io_section_vaddr_to_maddr_try (core->io, o);
		}
		r_list_foreach (core->io->sections, iter, s) {
			if (o >= s->paddr && o < s->paddr + s->size) {
				int sz;
				char *buf = r_file_slurp (input + 2, &sz);
				// TODO: use mmap here. we need a portable implementation
				if (!buf) {
					eprintf ("Cannot allocate 0x%08"PFMT64x""
						" bytes\n", s->size);
					return false;
				}
				r_io_write_at (core->io, s->vaddr, (const ut8*)buf, sz);
				eprintf ("Loaded %d bytes into the map region "
					" at 0x%08"PFMT64x"\n", sz, s->vaddr);
				free (buf);
				return true;
			}
		}
		eprintf ("No debug region found here\n");
		return false;
		}
		break;
	case '-':
		// remove all sections
		if (input[1] == '*') {
			r_io_section_init (core->io);
		}
		if (input[1] == '.') {
			RIOSection *s = r_io_section_vget (core->io, core->offset);
			if (!s) {
				return 0;
			}
			// use offset
			r_io_section_rm (core->io, s->id);
		}
		if (input[1]) {
			r_io_section_rm (core->io, atoi (input + 1));
		}
		break;
	case ' ':
		switch (input[1]) {
		case '-': // remove
			if (input[2] == '?' || input[2] == '\0') {
				eprintf ("Usage: S -N   # where N is the "
					" section index\n");
			} else {
				r_io_section_rm (core->io, atoi (input + 1));
			}
			break;
		default:
			{
			int i, rwx = 7;
			char *ptr = strdup (input + 1);
			const char *name = NULL;
			char vname[64];
			ut64 vaddr = 0LL;
			ut64 offset = 0LL;
			ut64 size = 0LL;
			ut64 vsize = 0LL;
			int fd = r_core_file_cur_fd(core);
			i = r_str_word_set0 (ptr);
			switch (i) {
			case 6: // get rwx
				rwx = r_str_rwx (r_str_word_get0 (ptr, 5));
			case 5: // get name
				name = r_str_word_get0 (ptr, 4);
			case 4: // get vsize
				vsize = r_num_math (core->num, r_str_word_get0 (ptr, 3));
				if (!vsize) {
					vsize = size;
				}
			case 3: // get size
				size = r_num_math (core->num, r_str_word_get0 (ptr, 2));
			case 2: // get vaddr
				vaddr = r_num_math (core->num, r_str_word_get0 (ptr, 1));
			case 1: // get offset
				offset = r_num_math (core->num, r_str_word_get0 (ptr, 0));
			}
			if (!vsize) {
				vsize = size;
				if (i > 3) {
					name = r_str_word_get0 (ptr, 3);
				}
				if (i > 4) {
					rwx = r_str_rwx (r_str_word_get0 (ptr, 4));
				}
			}
			if (!name || !*name) {
				sprintf (vname, "area%d", r_list_length (core->io->sections));
				name = vname;
			}
			r_io_section_add (core->io, offset, vaddr, size, vsize, rwx, name, 0, fd);
			free (ptr);
			}
			break;
		}
		break;
	case '=': // "S="
		r_io_section_list_visual (core->io, core->offset, core->blocksize,
					r_config_get_i (core->config, "scr.color"),
					r_cons_get_size (NULL));
		break;
	case '.':
		if (input[1] == '-') {
			ut64 o = core->offset;
			RListIter *iter, *iter2;
			RIOSection *s;
			if (core->io->va || core->io->debug) {
				o = r_io_section_vaddr_to_maddr_try (core->io, o);
			}
			r_list_foreach_safe (core->io->sections, iter, iter2, s) {
				if (o >= s->paddr && o < s->paddr + s->size) {
					r_io_section_rm (core->io, s->id);
					if (input[2] != '*') {
						break;
					}
				}
			}
		} else {
			ut64 o = core->offset;
			RListIter *iter;
			RIOSection *s;
			if (core->io->va || core->io->debug) {
				o = r_io_section_vaddr_to_maddr_try (core->io, o);
			}
			if (input[1] == 'j') { // "S.j"
				r_cons_printf ("[");
				r_list_foreach (core->io->sections, iter, s) {
					if (o >= s->paddr && o < s->paddr + s->size) {
						char *name = r_str_escape (s->name);
						r_cons_printf ("{\"start\":%" PFMT64u ",\"end\":%" PFMT64u ",\"name\":\"%s\"}",
							s->paddr + s->vaddr,
							s->paddr + s->vaddr + s->size,
							name);
						free (name);
						break;
					}
				}
				r_cons_printf ("]");
			} else {
				r_list_foreach (core->io->sections, iter, s) {
					if (o >= s->paddr && o < s->paddr + s->size) {
						r_cons_printf ("0x%08"PFMT64x" 0x%08"PFMT64x" %s\n",
							s->paddr + s->vaddr,
							s->paddr + s->vaddr + s->size,
							s->name);
						break;
					}
				}
			}
		}
		break;
	case '\0':
		r_io_section_list (core->io, core->offset, false);
		break;
	case '*':
		r_io_section_list (core->io, core->offset, true);
		break;
	}
	return 0;
}