arch: Add 64-bit LoongArch support

Signed-off-by: Xiaotian Wu <wuxiaotian@loongson.cn>
Signed-off-by: WANG Xuerui <git@xen0n.name>
Acked-by: Tom Hromatka <tom.hromatka@oracle.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

17 files changed, 176 insertions, 0 deletions

diff --git a/include/seccomp.h.in b/include/seccomp.h.in
index dfbb267..4ab10d9 100644
--- a/include/seccomp.h.in
+++ b/include/seccomp.h.in
@@ -153,6 +153,18 @@ struct scmp_arg_cmp {
 #define SCMP_ARCH_AARCH64	AUDIT_ARCH_AARCH64
 
 /**
+ * The LoongArch architecture tokens
+ */
+/* 64-bit LoongArch audit support is upstream as of 5.19-rc1 */
+#ifndef AUDIT_ARCH_LOONGARCH64
+#ifndef EM_LOONGARCH
+#define EM_LOONGARCH		258
+#endif /* EM_LOONGARCH */
+#define AUDIT_ARCH_LOONGARCH64	(EM_LOONGARCH|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
+#endif /* AUDIT_ARCH_LOONGARCH64 */
+#define SCMP_ARCH_LOONGARCH64	AUDIT_ARCH_LOONGARCH64
+
+/**
  * The MIPS architecture tokens
  */
 #ifndef __AUDIT_ARCH_CONVENTION_MIPS64_N32
diff --git a/src/Makefile.am b/src/Makefile.am
index 1ff0ee7..8c39d9e 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -32,6 +32,7 @@ SOURCES_ALL = \
 	arch-x32.h arch-x32.c \
 	arch-arm.h arch-arm.c \
 	arch-aarch64.h arch-aarch64.c \
+	arch-loongarch64.h arch-loongarch64.c \
 	arch-mips.h arch-mips.c \
 	arch-mips64.h arch-mips64.c \
 	arch-mips64n32.h arch-mips64n32.c \
diff --git a/src/arch-loongarch64.c b/src/arch-loongarch64.c
new file mode 100644
index 0000000..8268204
--- /dev/null
+++ b/src/arch-loongarch64.c
@@ -0,0 +1,42 @@
+/**
+ * Enhanced Seccomp 64-bit LoongArch Syscall Table
+ *
+ * Copyright (c) 2021 Xiaotian Wu <wuxiaotian@loongson.cn>
+ */
+
+/*
+ * 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>.
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+#include <linux/audit.h>
+
+#include "arch.h"
+#include "arch-loongarch64.h"
+#include "syscalls.h"
+
+ARCH_DEF(loongarch64)
+
+const struct arch_def arch_def_loongarch64 = {
+	.token = SCMP_ARCH_LOONGARCH64,
+	.token_bpf = AUDIT_ARCH_LOONGARCH64,
+	.size = ARCH_SIZE_64,
+	.endian = ARCH_ENDIAN_LITTLE,
+	.syscall_resolve_name_raw = loongarch64_syscall_resolve_name,
+	.syscall_resolve_num_raw = loongarch64_syscall_resolve_num,
+	.syscall_rewrite = NULL,
+	.rule_add = NULL,
+	.syscall_name_kver = loongarch64_syscall_name_kver,
+	.syscall_num_kver = loongarch64_syscall_num_kver,
+};
diff --git a/src/arch-loongarch64.h b/src/arch-loongarch64.h
new file mode 100644
index 0000000..c3c06af
--- /dev/null
+++ b/src/arch-loongarch64.h
@@ -0,0 +1,28 @@
+/**
+ * Enhanced Seccomp 64-bit LoongArch Syscall Table
+ *
+ * Copyright (c) 2021 Xiaotian Wu <wuxiaotian@loongson.cn>
+ */
+
+/*
+ * 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_LOONGARCH64_H
+#define _ARCH_LOONGARCH64_H
+
+#include "arch.h"
+
+ARCH_DECL(loongarch64)
+
+#endif
diff --git a/src/arch-syscall-dump.c b/src/arch-syscall-dump.c
index 843483b..abc1680 100644
--- a/src/arch-syscall-dump.c
+++ b/src/arch-syscall-dump.c
@@ -34,6 +34,7 @@
 #include "arch-x86_64.h"
 #include "arch-x32.h"
 #include "arch-arm.h"
+#include "arch-loongarch64.h"
 #include "arch-mips.h"
 #include "arch-mips64.h"
 #include "arch-mips64n32.h"
@@ -107,6 +108,9 @@ int main(int argc, char *argv[])
 		case SCMP_ARCH_AARCH64:
 			sys = aarch64_syscall_iterate(iter);
 			break;
+		case SCMP_ARCH_LOONGARCH64:
+			sys = loongarch64_syscall_iterate(iter);
+			break;
 		case SCMP_ARCH_MIPS:
 		case SCMP_ARCH_MIPSEL:
 			sys = mips_syscall_iterate(iter);
diff --git a/src/arch-syscall-validate b/src/arch-syscall-validate
index 0cb4d8f..b2f62c6 100755
--- a/src/arch-syscall-validate
+++ b/src/arch-syscall-validate
@@ -307,6 +307,48 @@ function dump_lib_aarch64() {
 }
 
 #
+# Dump the loongarch64 syscall table
+#
+# Arguments:
+#     1    path to the kernel source
+#
+#  Dump the architecture's syscall table to stdout.
+#
+function dump_sys_loongarch64() {
+	local sed_filter=""
+
+	sed_filter+='s/__NR3264_fadvise64/223/;'
+	sed_filter+='s/__NR3264_fcntl/25/;'
+	sed_filter+='s/__NR3264_fstatfs/44/;'
+	sed_filter+='s/__NR3264_ftruncate/46/;'
+	sed_filter+='s/__NR3264_lseek/62/;'
+	sed_filter+='s/__NR3264_mmap/222/;'
+	sed_filter+='s/__NR3264_sendfile/71/;'
+	sed_filter+='s/__NR3264_statfs/43/;'
+	sed_filter+='s/__NR3264_truncate/45/;'
+
+	gcc -E -dM -I$1/include/uapi \
+		-D__BITS_PER_LONG=64 \
+		-D__ARCH_WANT_SYS_CLONE \
+		-D__ARCH_WANT_SYS_CLONE3 \
+		$1/arch/loongarch/include/uapi/asm/unistd.h | \
+		grep "^#define __NR_" | \
+		sed '/__NR_syscalls/d' | \
+		sed '/__NR_arch_specific_syscall/d' | \
+		sed 's/#define[ \t]\+__NR_\([^ \t]\+\)[ \t]\+\(.*\)/\1,\2/' | \
+		sed $sed_filter | sort
+}
+
+#
+# Dump the loongarch64 library syscall table
+#
+#  Dump the library's syscall table to stdout.
+#
+function dump_lib_loongarch64() {
+	dump_lib_arch loongarch64 | mangle_lib_syscall loongarch64
+}
+
+#
 # Dump the mips system syscall table
 #
 # Arguments:
@@ -619,6 +661,9 @@ function dump_sys() {
 	aarch64)
 		dump_sys_aarch64 "$2"
 		;;
+	loongarch64)
+		dump_sys_loongarch64 "$2"
+		;;
 	mips)
 		dump_sys_mips "$2"
 		;;
@@ -686,6 +731,9 @@ function dump_lib() {
 	aarch64)
 		dump_lib_aarch64
 		;;
+	loongarch64)
+		dump_lib_loongarch64
+		;;
 	mips)
 		dump_lib_mips
 		;;
@@ -750,6 +798,7 @@ function gen_csv() {
 	abi_list=""
 	abi_list+=" x86 x86_64 x32"
 	abi_list+=" arm aarch64"
+	abi_list+=" loongarch64"
 	abi_list+=" mips mips64 mips64n32"
 	abi_list+=" parisc parisc64"
 	abi_list+=" ppc ppc64"
@@ -861,6 +910,7 @@ if [[ $opt_arches == "" ]]; then
 	opt_arches=" \
 		x86 x86_64 x32 \
 		arm aarch64 \
+		loongarch64 \
 		mips mips64 mips64n32 \
 		parisc parisc64 \
 		ppc ppc64 \
diff --git a/src/arch.c b/src/arch.c
index 921e455..8c45fa3 100644
--- a/src/arch.c
+++ b/src/arch.c
@@ -35,6 +35,7 @@
 #include "arch-x32.h"
 #include "arch-arm.h"
 #include "arch-aarch64.h"
+#include "arch-loongarch64.h"
 #include "arch-mips.h"
 #include "arch-mips64.h"
 #include "arch-mips64n32.h"
@@ -63,6 +64,8 @@ const struct arch_def *arch_def_native = &arch_def_x86_64;
 const struct arch_def *arch_def_native = &arch_def_arm;
 #elif __aarch64__
 const struct arch_def *arch_def_native = &arch_def_aarch64;
+#elif __loongarch64
+const struct arch_def *arch_def_native = &arch_def_loongarch64;
 #elif __mips__ && _MIPS_SIM == _MIPS_SIM_ABI32
 #if __MIPSEB__
 const struct arch_def *arch_def_native = &arch_def_mips;
@@ -141,6 +144,8 @@ const struct arch_def *arch_def_lookup(uint32_t token)
 		return &arch_def_arm;
 	case SCMP_ARCH_AARCH64:
 		return &arch_def_aarch64;
+	case SCMP_ARCH_LOONGARCH64:
+		return &arch_def_loongarch64;
 	case SCMP_ARCH_MIPS:
 		return &arch_def_mips;
 	case SCMP_ARCH_MIPSEL:
@@ -197,6 +202,8 @@ const struct arch_def *arch_def_lookup_name(const char *arch_name)
 		return &arch_def_arm;
 	else if (strcmp(arch_name, "aarch64") == 0)
 		return &arch_def_aarch64;
+	else if (strcmp(arch_name, "loongarch64") == 0)
+		return &arch_def_loongarch64;
 	else if (strcmp(arch_name, "mips") == 0)
 		return &arch_def_mips;
 	else if (strcmp(arch_name, "mipsel") == 0)
diff --git a/src/gen_pfc.c b/src/gen_pfc.c
index 4916055..bb217c8 100644
--- a/src/gen_pfc.c
+++ b/src/gen_pfc.c
@@ -61,6 +61,8 @@ static const char *_pfc_arch(const struct arch_def *arch)
 		return "arm";
 	case SCMP_ARCH_AARCH64:
 		return "aarch64";
+	case SCMP_ARCH_LOONGARCH64:
+		return "loongarch64";
 	case SCMP_ARCH_MIPS:
 		return "mips";
 	case SCMP_ARCH_MIPSEL:
diff --git a/src/python/libseccomp.pxd b/src/python/libseccomp.pxd
index 55f8207..a6bd0b4 100644
--- a/src/python/libseccomp.pxd
+++ b/src/python/libseccomp.pxd
@@ -38,6 +38,7 @@ cdef extern from "seccomp.h":
         SCMP_ARCH_X32
         SCMP_ARCH_ARM
         SCMP_ARCH_AARCH64
+        SCMP_ARCH_LOONGARCH64
         SCMP_ARCH_MIPS
         SCMP_ARCH_MIPS64
         SCMP_ARCH_MIPS64N32
diff --git a/src/python/seccomp.pyx b/src/python/seccomp.pyx
index 5657577..9891d76 100644
--- a/src/python/seccomp.pyx
+++ b/src/python/seccomp.pyx
@@ -206,6 +206,7 @@ cdef class Arch:
     X32 - 64-bit x86 using the x32 ABI
     ARM - ARM
     AARCH64 - 64-bit ARM
+    LOONGARCH64 - 64-bit LoongArch
     MIPS - MIPS O32 ABI
     MIPS64 - MIPS 64-bit ABI
     MIPS64N32 - MIPS N32 ABI
@@ -227,6 +228,7 @@ cdef class Arch:
     X32 = libseccomp.SCMP_ARCH_X32
     ARM = libseccomp.SCMP_ARCH_ARM
     AARCH64 = libseccomp.SCMP_ARCH_AARCH64
+    LOONGARCH64 = libseccomp.SCMP_ARCH_LOONGARCH64
     MIPS = libseccomp.SCMP_ARCH_MIPS
     MIPS64 = libseccomp.SCMP_ARCH_MIPS64
     MIPS64N32 = libseccomp.SCMP_ARCH_MIPS64N32
@@ -264,6 +266,8 @@ cdef class Arch:
                 self._token = libseccomp.SCMP_ARCH_ARM
             elif arch == libseccomp.SCMP_ARCH_AARCH64:
                 self._token = libseccomp.SCMP_ARCH_AARCH64
+            elif arch == libseccomp.SCMP_ARCH_LOONGARCH64:
+                self._token = libseccomp.SCMP_ARCH_LOONGARCH64
             elif arch == libseccomp.SCMP_ARCH_MIPS:
                 self._token = libseccomp.SCMP_ARCH_MIPS
             elif arch == libseccomp.SCMP_ARCH_MIPS64:
diff --git a/src/syscalls.h b/src/syscalls.h
index 3a9e0cb..10b2b7a 100644
--- a/src/syscalls.h
+++ b/src/syscalls.h
@@ -15,6 +15,7 @@
 #include "arch-aarch64.h"
 #include "arch-arm.h"
 #include "arch.h"
+#include "arch-loongarch64.h"
 #include "arch-mips64.h"
 #include "arch-mips64n32.h"
 #include "arch-mips.h"
@@ -51,6 +52,9 @@ struct arch_syscall_table {
 	int aarch64;
 	enum scmp_kver aarch64_kver;
 
+	int loongarch64;
+	enum scmp_kver loongarch64_kver;
+
 	int mips;
 	enum scmp_kver mips_kver;
 	int mips64;
diff --git a/src/system.c b/src/system.c
index 3d10e21..e205de7 100644
--- a/src/system.c
+++ b/src/system.c
@@ -128,6 +128,7 @@ int sys_chk_seccomp_syscall(void)
 	case SCMP_ARCH_X86_64:
 	case SCMP_ARCH_ARM:
 	case SCMP_ARCH_AARCH64:
+	case SCMP_ARCH_LOONGARCH64:
 	case SCMP_ARCH_PPC64:
 	case SCMP_ARCH_PPC64LE:
 	case SCMP_ARCH_S390:
diff --git a/tools/scmp_arch_detect.c b/tools/scmp_arch_detect.c
index b6bd2bb..c23cf7f 100644
--- a/tools/scmp_arch_detect.c
+++ b/tools/scmp_arch_detect.c
@@ -81,6 +81,9 @@ int main(int argc, char *argv[])
 		case SCMP_ARCH_AARCH64:
 			printf("aarch64\n");
 			break;
+		case SCMP_ARCH_LOONGARCH64:
+			printf("loongarch64\n");
+			break;
 		case SCMP_ARCH_MIPS:
 			printf("mips\n");
 			break;
diff --git a/tools/scmp_bpf_disasm.c b/tools/scmp_bpf_disasm.c
index b682de7..4572659 100644
--- a/tools/scmp_bpf_disasm.c
+++ b/tools/scmp_bpf_disasm.c
@@ -484,6 +484,8 @@ int main(int argc, char *argv[])
 				arch = AUDIT_ARCH_ARM;
 			else if (strcmp(optarg, "aarch64") == 0)
 				arch = AUDIT_ARCH_AARCH64;
+			else if (strcmp(optarg, "loongarch64") == 0)
+				arch = AUDIT_ARCH_LOONGARCH64;
 			else if (strcmp(optarg, "mips") == 0)
 				arch = AUDIT_ARCH_MIPS;
 			else if (strcmp(optarg, "mipsel") == 0)
diff --git a/tools/scmp_bpf_sim.c b/tools/scmp_bpf_sim.c
index 04edfbc..7d31d79 100644
--- a/tools/scmp_bpf_sim.c
+++ b/tools/scmp_bpf_sim.c
@@ -259,6 +259,8 @@ int main(int argc, char *argv[])
 				arch = AUDIT_ARCH_ARM;
 			else if (strcmp(optarg, "aarch64") == 0)
 				arch = AUDIT_ARCH_AARCH64;
+			else if (strcmp(optarg, "loongarch64") == 0)
+				arch = AUDIT_ARCH_LOONGARCH64;
 			else if (strcmp(optarg, "mips") == 0)
 				arch = AUDIT_ARCH_MIPS;
 			else if (strcmp(optarg, "mipsel") == 0)
diff --git a/tools/util.c b/tools/util.c
index afea6c9..327fc14 100644
--- a/tools/util.c
+++ b/tools/util.c
@@ -44,6 +44,8 @@
 #define ARCH_NATIVE		AUDIT_ARCH_ARM
 #elif __aarch64__
 #define ARCH_NATIVE		AUDIT_ARCH_AARCH64
+#elif __loongarch64
+#define ARCH_NATIVE		AUDIT_ARCH_LOONGARCH64
 #elif __mips__ && _MIPS_SIM == _MIPS_SIM_ABI32
 #if __MIPSEB__
 #define ARCH_NATIVE		AUDIT_ARCH_MIPS
diff --git a/tools/util.h b/tools/util.h
index 6c2ca33..24b9ed6 100644
--- a/tools/util.h
+++ b/tools/util.h
@@ -38,6 +38,17 @@
 #endif /* AUDIT_ARCH_AARCH64 */
 
 /**
+ * The 64-bit LoongArch architecture tokens
+ */
+/* 64-bit LoongArch audit support is upstream as of 5.19-rc1 */
+#ifndef AUDIT_ARCH_LOONGARCH64
+#ifndef EM_LOONGARCH
+#define EM_LOONGARCH		258
+#endif /* EM_LOONGARCH */
+#define AUDIT_ARCH_LOONGARCH64	(EM_LOONGARCH|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
+#endif /* AUDIT_ARCH_LOONGARCH64 */
+
+/**
  * The MIPS architecture tokens
  */
 #ifndef __AUDIT_ARCH_CONVENTION_MIPS64_N32