1 files changed, 122 insertions, 0 deletions
diff --git a/src/arch.h b/src/arch.h
new file mode 100644
index 0000000..9816274
--- /dev/null
+++ b/src/arch.h
@@ -0,0 +1,122 @@
+/**
+ * Enhanced Seccomp Architecture/Machine Specific Code
+ *
+ * Copyright (c) 2012 Red Hat <pmoore@redhat.com>
+ * Author: Paul Moore <paul@paul-moore.com>
+ */
+
+/*
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of version 2.1 of the GNU Lesser General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, see <http://www.gnu.org/licenses>.
+ */
+
+#ifndef _ARCH_H
+#define _ARCH_H
+
+#include <inttypes.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+#include <seccomp.h>
+
+#include "system.h"
+
+struct db_filter;
+struct db_api_arg;
+struct db_api_rule_list;
+
+struct arch_def {
+	/* arch definition */
+	uint32_t token;
+	uint32_t token_bpf;
+	enum {
+		ARCH_SIZE_UNSPEC = 0,
+		ARCH_SIZE_32 = 32,
+		ARCH_SIZE_64 = 64,
+	} size;
+	enum {
+		ARCH_ENDIAN_UNSPEC = 0,
+		ARCH_ENDIAN_LITTLE,
+		ARCH_ENDIAN_BIG,
+	} endian;
+
+	/* arch specific constants */
+	int sys_socketcall;
+	int sys_ipc;
+
+	/* arch specific functions */
+	int (*syscall_resolve_name)(const struct arch_def *arch,
+				    const char *name);
+	int (*syscall_resolve_name_raw)(const char *name);
+	const char *(*syscall_resolve_num)(const struct arch_def *arch,
+					   int num);
+	const char *(*syscall_resolve_num_raw)(int num);
+	int (*syscall_rewrite)(const struct arch_def *arch, int *syscall);
+	int (*rule_add)(struct db_filter *db, struct db_api_rule_list *rule);
+};
+
+/* arch_def for the current architecture */
+extern const struct arch_def *arch_def_native;
+
+/* macro to declare the arch specific structures and functions */
+#define ARCH_DECL(NAME) \
+	extern const struct arch_def arch_def_##NAME; \
+	int NAME##_syscall_resolve_name(const char *name); \
+	const char *NAME##_syscall_resolve_num(int num); \
+	const struct arch_syscall_def *NAME##_syscall_iterate(unsigned int spot);
+
+/* macro to define the arch specific structures and functions */
+#define ARCH_DEF(NAME) \
+	int NAME##_syscall_resolve_name(const char *name) \
+	{ \
+		return syscall_resolve_name(name, OFFSET_ARCH(NAME)); \
+	} \
+	const char *NAME##_syscall_resolve_num(int num) \
+	{ \
+		return syscall_resolve_num(num, OFFSET_ARCH(NAME)); \
+	} \
+	const struct arch_syscall_def *NAME##_syscall_iterate(unsigned int spot) \
+	{ \
+		return syscall_iterate(spot, OFFSET_ARCH(NAME)); \
+	}
+
+/* syscall name/num mapping */
+struct arch_syscall_def {
+	const char *name;
+	unsigned int num;
+};
+
+#define DATUM_MAX	((scmp_datum_t)-1)
+#define D64_LO(x)	((uint32_t)((uint64_t)(x) & 0x00000000ffffffff))
+#define D64_HI(x)	((uint32_t)((uint64_t)(x) >> 32))
+
+#define ARG_COUNT_MAX	6
+
+int arch_valid(uint32_t arch);
+
+const struct arch_def *arch_def_lookup(uint32_t token);
+const struct arch_def *arch_def_lookup_name(const char *arch_name);
+
+int arch_arg_offset_lo(const struct arch_def *arch, unsigned int arg);
+int arch_arg_offset_hi(const struct arch_def *arch, unsigned int arg);
+int arch_arg_offset(const struct arch_def *arch, unsigned int arg);
+
+int arch_syscall_resolve_name(const struct arch_def *arch, const char *name);
+const char *arch_syscall_resolve_num(const struct arch_def *arch, int num);
+
+int arch_syscall_translate(const struct arch_def *arch, int *syscall);
+int arch_syscall_rewrite(const struct arch_def *arch, int *syscall);
+
+int arch_filter_rule_add(struct db_filter *db,
+			 const struct db_api_rule_list *rule);
+
+#endif