asm_x86_nasm.c

Go to the documentation of this file.

// SPDX-FileCopyrightText: 2009-2020 pancake <pancake@nopcode.org>
// SPDX-License-Identifier: LGPL-3.0-only
 
#include <rz_lib.h>
#include <rz_asm.h>
 
static int assemble(RzAsm *a, RzAsmOp *op, const char *buf) {
    char *ipath, *opath;
    if (a->syntax != RZ_ASM_SYNTAX_INTEL) {
        RZ_LOG_ERROR("assembler: x86.nasm: the assembler does not support non-intel syntax\n");
        return -1;
    }
 
    int ifd = rz_file_mkstemp("rz_nasm", &ipath);
    if (ifd == -1) {
        return -1;
    }
 
    int ofd = rz_file_mkstemp("rz_nasm", &opath);
    if (ofd == -1) {
        free(ipath);
        return -1;
    }
 
    char *asm_buf = rz_str_newf("[BITS %i]\nORG 0x%" PFMT64x "\n%s\n", a->bits, a->pc, buf);
    if (asm_buf) {
        rz_xwrite(ifd, asm_buf, strlen(asm_buf));
        free(asm_buf);
    }
 
    close(ifd);
 
    if (!rz_sys_cmdf("nasm %s -o %s", ipath, opath)) {
        ut8 buf[512]; // TODO: remove limits
        op->size = read(ofd, buf, sizeof(buf));
        rz_asm_op_set_buf(op, buf, op->size);
    } else {
        RZ_LOG_ERROR("assembler: x86.nasm: failed to run command 'nasm %s -o %s'\n", ipath, opath);
    }
 
    close(ofd);
    unlink(ipath);
    unlink(opath);
    free(ipath);
    free(opath);
 
    return op->size;
}
 
RzAsmPlugin rz_asm_plugin_x86_nasm = {
    .name = "x86.nasm",
    .desc = "X86 nasm assembler",
    .license = "LGPL3",
    .arch = "x86",
    // NOTE: 64bits is not supported on OSX's nasm :(
    .bits = 16 | 32 | 64,
    .endian = RZ_SYS_ENDIAN_LITTLE,
    .assemble = &assemble
};
 
#ifndef RZ_PLUGIN_INCORE
RZ_API RzLibStruct rizin_plugin = {
    .type = RZ_LIB_TYPE_ASM,
    .data = &rz_asm_plugin_x86_nasm,
    .version = RZ_VERSION
};
#endif