From 81749f1fe87e489c4e2e7408a0fae9370c3810b3 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 15 Apr 2024 19:09:30 +0200 Subject: Adding upstream version 2.5.5. Signed-off-by: Daniel Baumann --- src/arch-arm.c | 95 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 95 insertions(+) create mode 100644 src/arch-arm.c (limited to 'src/arch-arm.c') diff --git a/src/arch-arm.c b/src/arch-arm.c new file mode 100644 index 0000000..c389815 --- /dev/null +++ b/src/arch-arm.c @@ -0,0 +1,95 @@ +/** + * Enhanced Seccomp ARM Specific Code + * + * Copyright (c) 2013 Red Hat + * Author: Paul Moore + */ + +/* + * 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 . + */ + +#include +#include +#include + +#include "arch.h" +#include "arch-arm.h" +#include "syscalls.h" + +#define __SCMP_NR_OABI_SYSCALL_BASE 0x900000 +#define __SCMP_ARM_NR_BASE 0x0f0000 + +/* NOTE: we currently only support the ARM EABI, more info at the URL below: + * -> http://wiki.embeddedarm.com/wiki/EABI_vs_OABI */ +#if 1 +#define __SCMP_NR_BASE 0 +#else +#define __SCMP_NR_BASE __SCMP_NR_OABI_SYSCALL_BASE +#endif + +/** + * Resolve a syscall name to a number + * @param arch the architecture definition + * @param name the syscall name + * + * Resolve the given syscall name to the syscall number using the syscall table. + * Returns the syscall number on success, including negative pseudo syscall + * numbers; returns __NR_SCMP_ERROR on failure. + * + */ +int arm_syscall_resolve_name_munge(const struct arch_def *arch, + const char *name) +{ + int sys; + + /* NOTE: we don't want to modify the pseudo-syscall numbers */ + sys = arch->syscall_resolve_name_raw(name); + if (sys == __NR_SCMP_ERROR || sys < 0) + return sys; + + return (sys | __SCMP_NR_BASE); +} + +/** + * Resolve a syscall number to a name + * @param arch the architecture definition + * @param num the syscall number + * + * Resolve the given syscall number to the syscall name using the syscall table. + * Returns a pointer to the syscall name string on success, including pseudo + * syscall names; returns NULL on failure. + * + */ +const char *arm_syscall_resolve_num_munge(const struct arch_def *arch, int num) +{ + /* NOTE: we don't want to modify the pseudo-syscall numbers */ + if (num >= 0) + num &= ~__SCMP_NR_BASE; + return arch->syscall_resolve_num_raw(num); +} + +ARCH_DEF(arm) + +const struct arch_def arch_def_arm = { + .token = SCMP_ARCH_ARM, + .token_bpf = AUDIT_ARCH_ARM, + .size = ARCH_SIZE_32, + .endian = ARCH_ENDIAN_LITTLE, + .syscall_resolve_name = arm_syscall_resolve_name_munge, + .syscall_resolve_name_raw = arm_syscall_resolve_name, + .syscall_resolve_num = arm_syscall_resolve_num_munge, + .syscall_resolve_num_raw = arm_syscall_resolve_num, + .syscall_rewrite = NULL, + .rule_add = NULL, +}; -- cgit v1.2.3