DEC Alpha disassembly and analysis plugins

librz/arch/isa/alpha/alpha.h

@@ -0,0 +1,19 @@
+// SPDX-FileCopyrightText: 2024 Anton Kochkov <[email protected]>
+// SPDX-License-Identifier: LGPL-3.0-only
+
+#include <rz_types.h>
+#include <capstone.h>
+
+#ifndef RZ_ALPHA_H
+#define RZ_ALPHA_H
+
+typedef struct {
+	csh h;
+	cs_mode mode;
+	cs_insn *insn;
+	ut32 count;
+	ut32 word;
+	RzPVector /*<RzAsmTokenPattern *>*/ *token_patterns;
+} RzAsmAlphaContext;
+
+#endif // RZ_ALPHA_H

librz/arch/isa/alpha/alpha.inc

@@ -0,0 +1,68 @@
+// SPDX-FileCopyrightText: 2023 billow <[email protected]>
+// SPDX-FileCopyrightText: 2024 Anton Kochkov <[email protected]>
+// SPDX-License-Identifier: LGPL-3.0-only
+
+#include <capstone/capstone.h>
+#include <capstone/alpha.h>
+#include "alpha.h"
+
+static inline bool alpha_setup_cs_handle(RzAsmAlphaContext *ctx, const char *cpu, const char *features, bool big_endian) {
+	const cs_mode mode = big_endian ? CS_MODE_BIG_ENDIAN : CS_MODE_LITTLE_ENDIAN;
+	if (mode != ctx->mode) {
+		cs_close(&ctx->h);
+		ctx->h = 0;
+		ctx->mode = mode;
+	}
+
+	if (ctx->h != 0) {
+		return true;
+	}
+	cs_err err = cs_open(CS_ARCH_ALPHA, mode, &ctx->h);
+	if (err) {
+		RZ_LOG_ERROR("Failed on cs_open() with error returned: %u\n", err);
+		return false;
+	}
+	err = cs_option(ctx->h, CS_OPT_DETAIL,
+		RZ_STR_ISNOTEMPTY(features) || features == NULL ? CS_OPT_ON : CS_OPT_OFF);
+	if (err) {
+		RZ_LOG_ERROR("Failed on cs_open() with error returned: %u\n", err);
+		return false;
+	}
+	return true;
+}
+
+static inline ut8 alpha_op_count(cs_insn *insn) {
+	return insn->detail->alpha.op_count;
+}
+
+static inline cs_alpha_op *alpha_op_get(cs_insn *insn, int idx) {
+	if (idx >= alpha_op_count(insn)) {
+		RZ_LOG_WARN("Failed to get operand%d [%d]: \"%s %s\"\n",
+			idx, alpha_op_count(insn), insn->mnemonic, insn->op_str);
+		rz_warn_if_reached();
+		return NULL;
+	}
+	return &insn->detail->alpha.operands[idx];
+}
+
+static inline const char *alpha_op_as_reg(RzAsmAlphaContext *ctx, int idx) {
+	const cs_alpha_op *op = alpha_op_get(ctx->insn, idx);
+	if (op->type != ALPHA_OP_REG) {
+		RZ_LOG_WARN("Failed to get operand%d [%d]: \"%s %s\" [reg]\n",
+			idx, alpha_op_count(ctx->insn), ctx->insn->mnemonic, ctx->insn->op_str);
+		rz_warn_if_reached();
+		return NULL;
+	}
+	return cs_reg_name(ctx->h, op->reg);
+}
+
+static inline st64 alpha_op_as_imm(RzAsmAlphaContext *ctx, int idx) {
+	const cs_alpha_op *op = alpha_op_get(ctx->insn, idx);
+	if (op->type != ALPHA_OP_IMM) {
+		RZ_LOG_WARN("Failed to get operand%d [%d]: \"%s %s\" [imm]\n",
+			idx, alpha_op_count(ctx->insn), ctx->insn->mnemonic, ctx->insn->op_str);
+		rz_warn_if_reached();
+		return 0;
+	}
+	return op->imm;
+}

librz/arch/meson.build

@@ -6,6 +6,7 @@ subdir('platforms')
 arch_plugins_list = [
   '6502',
   '8051',
+  'alpha_cs',
   'amd29k',
   'arm_as',
   'arm_cs',
@@ -63,6 +64,7 @@ arch_plugins_list = [
 arch_plugin_sources = [
   'p/arch_6502.c',
   'p/arch_8051.c',
+  'p/arch_alpha.c',
   'p/arch_amd29k.c',
   'p/arch_arm_as.c',
   'p/arch_arm_cs.c',