diff options
Diffstat (limited to 'src/shared')
| -rw-r--r-- | src/shared/.gitignore | 4 | ||||
| -rw-r--r-- | src/shared/linux/seccomp-bpf.h | 76 | ||||
| -rw-r--r-- | src/shared/linux/seccomp.h | 47 | ||||
| -rw-r--r-- | src/shared/syscall-list.c | 56 | ||||
| -rw-r--r-- | src/shared/syscall-list.h | 41 |
5 files changed, 0 insertions, 224 deletions
diff --git a/src/shared/.gitignore b/src/shared/.gitignore index 3820d1956b..c9b5f81719 100644 --- a/src/shared/.gitignore +++ b/src/shared/.gitignore @@ -1,7 +1,3 @@ -/syscall-from-name.gperf -/syscall-from-name.h -/syscall-list.txt -/syscall-to-name.h /errno-from-name.gperf /errno-from-name.h /errno-list.txt diff --git a/src/shared/linux/seccomp-bpf.h b/src/shared/linux/seccomp-bpf.h deleted file mode 100644 index 1e3d136739..0000000000 --- a/src/shared/linux/seccomp-bpf.h +++ /dev/null @@ -1,76 +0,0 @@ -/* - * seccomp example for x86 (32-bit and 64-bit) with BPF macros - * - * Copyright (c) 2012 The Chromium OS Authors <chromium-os-dev@chromium.org> - * Authors: - * Will Drewry <wad@chromium.org> - * Kees Cook <keescook@chromium.org> - * - * The code may be used by anyone for any purpose, and can serve as a - * starting point for developing applications using mode 2 seccomp. - */ -#ifndef _SECCOMP_BPF_H_ -#define _SECCOMP_BPF_H_ - -#include <stdio.h> -#include <stddef.h> -#include <stdlib.h> -#include <errno.h> -#include <signal.h> -#include <string.h> -#include <unistd.h> - -#include <sys/prctl.h> - -#include <linux/unistd.h> -#include <linux/audit.h> -#include <linux/filter.h> -#include <linux/seccomp.h> - -#ifndef SECCOMP_MODE_FILTER -# define SECCOMP_MODE_FILTER 2 /* uses user-supplied filter. */ -# define SECCOMP_RET_KILL 0x00000000U /* kill the task immediately */ -# define SECCOMP_RET_TRAP 0x00030000U /* disallow and force a SIGSYS */ -# define SECCOMP_RET_ALLOW 0x7fff0000U /* allow */ -struct seccomp_data { - int nr; - __u32 arch; - __u64 instruction_pointer; - __u64 args[6]; -}; -#endif -#ifndef SYS_SECCOMP -# define SYS_SECCOMP 1 -#endif - -#define syscall_nr (offsetof(struct seccomp_data, nr)) -#define arch_nr (offsetof(struct seccomp_data, arch)) - -#if defined(__i386__) -# define REG_SYSCALL REG_EAX -# define ARCH_NR AUDIT_ARCH_I386 -#elif defined(__x86_64__) -# define REG_SYSCALL REG_RAX -# define ARCH_NR AUDIT_ARCH_X86_64 -#else -# warning "Platform does not support seccomp filter yet" -# define REG_SYSCALL 0 -# define ARCH_NR 0 -#endif - -#define VALIDATE_ARCHITECTURE \ - BPF_STMT(BPF_LD+BPF_W+BPF_ABS, arch_nr), \ - BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, ARCH_NR, 1, 0), \ - BPF_STMT(BPF_RET+BPF_K, SECCOMP_RET_KILL) - -#define EXAMINE_SYSCALL \ - BPF_STMT(BPF_LD+BPF_W+BPF_ABS, syscall_nr) - -#define ALLOW_SYSCALL(name) \ - BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, __NR_##name, 0, 1), \ - BPF_STMT(BPF_RET+BPF_K, SECCOMP_RET_ALLOW) - -#define _KILL_PROCESS \ - BPF_STMT(BPF_RET+BPF_K, SECCOMP_RET_KILL) - -#endif /* _SECCOMP_BPF_H_ */ diff --git a/src/shared/linux/seccomp.h b/src/shared/linux/seccomp.h deleted file mode 100644 index 9c03683fa0..0000000000 --- a/src/shared/linux/seccomp.h +++ /dev/null @@ -1,47 +0,0 @@ -#ifndef _LINUX_SECCOMP_H -#define _LINUX_SECCOMP_H - - -#include <linux/types.h> - - -/* Valid values for seccomp.mode and prctl(PR_SET_SECCOMP, <mode>) */ -#define SECCOMP_MODE_DISABLED 0 /* seccomp is not in use. */ -#define SECCOMP_MODE_STRICT 1 /* uses hard-coded filter. */ -#define SECCOMP_MODE_FILTER 2 /* uses user-supplied filter. */ - -/* - * All BPF programs must return a 32-bit value. - * The bottom 16-bits are for optional return data. - * The upper 16-bits are ordered from least permissive values to most. - * - * The ordering ensures that a min_t() over composed return values always - * selects the least permissive choice. - */ -#define SECCOMP_RET_KILL 0x00000000U /* kill the task immediately */ -#define SECCOMP_RET_TRAP 0x00030000U /* disallow and force a SIGSYS */ -#define SECCOMP_RET_ERRNO 0x00050000U /* returns an errno */ -#define SECCOMP_RET_TRACE 0x7ff00000U /* pass to a tracer or disallow */ -#define SECCOMP_RET_ALLOW 0x7fff0000U /* allow */ - -/* Masks for the return value sections. */ -#define SECCOMP_RET_ACTION 0x7fff0000U -#define SECCOMP_RET_DATA 0x0000ffffU - -/** - * struct seccomp_data - the format the BPF program executes over. - * @nr: the system call number - * @arch: indicates system call convention as an AUDIT_ARCH_* value - * as defined in <linux/audit.h>. - * @instruction_pointer: at the time of the system call. - * @args: up to 6 system call arguments always stored as 64-bit values - * regardless of the architecture. - */ -struct seccomp_data { - int nr; - __u32 arch; - __u64 instruction_pointer; - __u64 args[6]; -}; - -#endif /* _LINUX_SECCOMP_H */ diff --git a/src/shared/syscall-list.c b/src/shared/syscall-list.c deleted file mode 100644 index dc84dca8fe..0000000000 --- a/src/shared/syscall-list.c +++ /dev/null @@ -1,56 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -/*** - This file is part of systemd. - - Copyright 2012 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <sys/syscall.h> -#include <string.h> - -#include "util.h" -#include "syscall-list.h" - -static const struct syscall_name* lookup_syscall(register const char *str, - register unsigned int len); - -#include "syscall-to-name.h" -#include "syscall-from-name.h" - -const char *syscall_to_name(int id) { - id = SYSCALL_TO_INDEX(id); - if (id < 0 || id >= (int) ELEMENTSOF(syscall_names)) - return NULL; - - return syscall_names[id]; -} - -int syscall_from_name(const char *name) { - const struct syscall_name *sc; - - assert(name); - - sc = lookup_syscall(name, strlen(name)); - if (!sc) - return -1; - - return sc->id; -} - -int syscall_max(void) { - return ELEMENTSOF(syscall_names); -} diff --git a/src/shared/syscall-list.h b/src/shared/syscall-list.h deleted file mode 100644 index 37efc5681d..0000000000 --- a/src/shared/syscall-list.h +++ /dev/null @@ -1,41 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -#pragma once - -/*** - This file is part of systemd. - - Copyright 2012 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#if defined __x86_64__ && defined __ILP32__ -/* The x32 ABI defines all of its syscalls with bit 30 set, which causes - issues when attempting to use syscalls as simple indices into an array. - Instead, use the syscall id & ~SYSCALL_MASK as the index, and | the - internal id with the syscall mask as needed. -*/ -#include <asm/unistd.h> -#define SYSCALL_TO_INDEX(x) ((x) & ~__X32_SYSCALL_BIT) -#define INDEX_TO_SYSCALL(x) ((x) | __X32_SYSCALL_BIT) -#else -#define SYSCALL_TO_INDEX(x) (x) -#define INDEX_TO_SYSCALL(x) (x) -#endif - -const char *syscall_to_name(int id); -int syscall_from_name(const char *name); - -int syscall_max(void); |