/* radare2 - LGPL - Copyright 2014-2023 - pancake */

#include <r_arch.h>
#include <r_lib.h>
#include <capstone/capstone.h>
#include <capstone/xcore.h>

#if CS_API_MAJOR < 2
#error Old Capstone not supported
#endif

#define INSOP(n) insn->detail->xcore.operands[n]

#define CSINC XCORE
#define CSINC_MODE \
	CS_MODE_BIG_ENDIAN \
	| (as->config->cpu != NULL && ((!strcmp (as->config->cpu, "v9"))) ? CS_MODE_V9 : 0)
#include "../capstone.inc.c"

static void opex(RStrBuf *buf, csh handle, cs_insn *insn) {
	int i;
	PJ *pj = pj_new ();
	if (!pj) {
		return;
	}
	pj_o (pj);
	pj_ka (pj, "operands");
	cs_xcore *x = &insn->detail->xcore;
	for (i = 0; i < x->op_count; i++) {
		cs_xcore_op *op = x->operands + i;
		pj_o (pj);
		switch (op->type) {
		case XCORE_OP_REG:
			pj_ks (pj, "type", "reg");
			pj_ks (pj, "value", cs_reg_name (handle, op->reg));
			break;
		case XCORE_OP_IMM:
			pj_ks (pj, "type", "imm");
			pj_ki (pj, "value", op->imm);
			break;
		case XCORE_OP_MEM:
			pj_ks (pj, "type", "mem");
			if (op->mem.base != XCORE_REG_INVALID) {
				pj_ks (pj, "base", cs_reg_name (handle, op->mem.base));
			}
			pj_ki (pj, "disp", op->mem.disp);
			break;
		default:
			pj_ks (pj, "type", "invalid");
			break;
		}
		pj_end (pj); /* o operand */
	}
	pj_end (pj); /* a operands */
	pj_end (pj);

	r_strbuf_init (buf);
	r_strbuf_append (buf, pj_string (pj));
	pj_free (pj);
}

static csh cs_handle_for_session(RArchSession *as) {
	r_return_val_if_fail (as && as->data, 0);
	CapstonePluginData *pd = as->data;
	return pd->cs_handle;
}

static bool decode(RArchSession *as, RAnalOp *op, RAnalOpMask mask) {
	const ut64 addr = op->addr;
	const ut8 *buf = op->bytes;
	const int len = op->size;

	csh handle = cs_handle_for_session (as);
	if (handle == 0) {
		return false;
	}

	op->size = 2;
	cs_insn *insn;
	int n;
	// capstone-next
	n = cs_disasm (handle, (const ut8*)buf, len, addr, 1, &insn);
	if (n < 1) {
		op->type = R_ANAL_OP_TYPE_ILL;
	} else {
		if (mask & R_ARCH_OP_MASK_OPEX) {
			opex (&op->opex, handle, insn);
		}
		if (mask & R_ARCH_OP_MASK_DISASM) {
			op->mnemonic = r_str_newf ("%s%s%s",
				insn->mnemonic, insn->op_str[0]? " ": "",
				insn->op_str);
		}
		op->size = insn->size;
		op->id = insn->id;
		switch (insn->id) {
		case XCORE_INS_DRET:
		case XCORE_INS_KRET:
		case XCORE_INS_RETSP:
			op->type = R_ANAL_OP_TYPE_RET;
			break;
		case XCORE_INS_DCALL:
		case XCORE_INS_KCALL:
		case XCORE_INS_ECALLF:
		case XCORE_INS_ECALLT:
			op->type = R_ANAL_OP_TYPE_CALL;
			op->jump = INSOP(0).imm;
			break;
		/* ??? */
		case XCORE_INS_BL:
		case XCORE_INS_BLA:
		case XCORE_INS_BLAT:
		case XCORE_INS_BT:
		case XCORE_INS_BF:
		case XCORE_INS_BU:
		case XCORE_INS_BRU:
			op->type = R_ANAL_OP_TYPE_CALL;
			op->jump = INSOP(0).imm;
			break;
		case XCORE_INS_SUB:
		case XCORE_INS_LSUB:
			op->type = R_ANAL_OP_TYPE_SUB;
			break;
		case XCORE_INS_ADD:
		case XCORE_INS_LADD:
			op->type = R_ANAL_OP_TYPE_ADD;
			break;
		}
		cs_free (insn, n);
	}
	return op->size > 0;
}

static int archinfo(RArchSession *as, ut32 q) {
	return 0;
}

static char *mnemonics(RArchSession *as, int id, bool json) {
	CapstonePluginData *cpd = as->data;
	return r_arch_cs_mnemonics (as, cpd->cs_handle, id, json);
}

static bool init(RArchSession *as) {
	r_return_val_if_fail (as, false);
	if (as->data) {
		R_LOG_WARN ("Already initialized");
		return false;
	}
	as->data = R_NEW0 (CapstonePluginData);
	CapstonePluginData *cpd = (CapstonePluginData*)as->data;
	if (!r_arch_cs_init (as, &cpd->cs_handle)) {
		R_LOG_ERROR ("Cannot initialize capstone");
		R_FREE (as->data);
		return false;
	}
	return true;
}

static bool fini(RArchSession *as) {
	r_return_val_if_fail (as, false);
	CapstonePluginData *cpd = as->data;
	cs_close (&cpd->cs_handle);
	R_FREE (as->data);
	return true;
}

RArchPlugin r_arch_plugin_xcore_cs = {
	.name = "xcore",
	.desc = "Capstone XCORE analysis",
	.license = "BSD",
	.arch = "xcore",
	.bits = R_SYS_BITS_PACK1 (32),
	.decode = decode,
	.info = archinfo,
	//.regs = regs,
	.mnemonics = mnemonics,
	.init = init,
	.fini = fini,
};

#ifndef R2_PLUGIN_INCORE
R_API RLibStruct radare_plugin = {
	.type = R_LIB_TYPE_ARCH,
	.data = &r_arch_plugin_xcore_cs,
	.version = R2_VERSION
};
#endif
