Implementing a new format
To enable virtual addressing
In info
add et->has_va = 1;
and ptr->srwx
with the R_BIN_SCN_MAP;
attribute
Create a folder with file format name in libr/bin/format
Makefile:
NAME=bin_nes
R2_PLUGIN_PATH=$(shell r2 -hh|grep LIBR_PLUGINS|awk '{print $$2}')
CFLAGS=-g -fPIC $(shell pkg-config --cflags r_bin)
LDFLAGS=-shared $(shell pkg-config --libs r_bin)
OBJS=$(NAME).o
SO_EXT=$(shell uname|grep -q Darwin && echo dylib || echo so)
LIB=$(NAME).$(SO_EXT)
all: $(LIB)
clean:
rm -f $(LIB) $(OBJS)
$(LIB): $(OBJS)
$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) -o $(LIB)
install:
cp -f $(NAME).$(SO_EXT) $(R2_PLUGIN_PATH)
uninstall:
rm -f $(R2_PLUGIN_PATH)/$(NAME).$(SO_EXT)
bin_nes.c:
#include <r_bin.h>
static int check(RBinFile *arch);
static int check_bytes(const ut8 *buf, ut64 length);
static void * load_bytes(RBinFile *arch, const ut8 *buf, ut64 sz, ut64 loadaddr, Sdb *sdb){
check_bytes (buf, sz);
return R_NOTNULL;
}
static int check(RBinFile *arch) {
const ut8 \*bytes = arch ? r_buf_buffer (arch->buf) : NULL;
ut64 sz = arch ? r_buf_size (arch->buf): 0;
return check_bytes (bytes, sz);
}
static int check_bytes(const ut8 *buf, ut64 length) {
if (!buf || length < 4) return false;
return (!memcmp (buf, "\x4E\x45\x53\x1A", 4));
}
static RBinInfo* info(RBinFile *arch) {
RBinInfo \*ret = R_NEW0 (RBinInfo);
if (!ret) return NULL;
if (!arch || !arch->buf) {
free (ret);
return NULL;
}
ret->file = strdup (arch->file);
ret->type = strdup ("ROM");
ret->machine = strdup ("Nintendo NES");
ret->os = strdup ("nes");
ret->arch = strdup ("6502");
ret->bits = 8;
return ret;
}
struct r_bin_plugin_t r_bin_plugin_nes = {
.name = "nes",
.desc = "NES",
.license = "BSD",
.init = NULL,
.fini = NULL,
.get_sdb = NULL,
.load = NULL,
.load_bytes = &load_bytes,
.check = &check,
.baddr = NULL,
.check_bytes = &check_bytes,
.entries = NULL,
.sections = NULL,
.info = &info,
};
#ifndef CORELIB
struct r_lib_struct_t radare_plugin = {
.type = R_LIB_TYPE_BIN,
.data = &r_bin_plugin_nes,
.version = R2_VERSION
};
#endif
Some Examples
- XBE - https://github.com/radare/radare2/pull/972
- COFF - https://github.com/radare/radare2/pull/645
- TE - https://github.com/radare/radare2/pull/61
- Zimgz - https://github.com/radare/radare2/commit/d1351cf836df3e2e63043a6dc728e880316f00eb
- OMF - https://github.com/radare/radare2/commit/44fd8b2555a0446ea759901a94c06f20566bbc40