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%{
/**
* Copyright (c) 2012 Red Hat <pmoore@redhat.com>
* Copyright (c) 2020 Red Hat <gscrivan@redhat.com>
* Copyright (c) 2022 Microsoft Corporation. <paulmoore@microsoft.com>
*
* Authors: Paul Moore <paul@paul-moore.com>
* Giuseppe Scrivano <gscrivan@redhat.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>.
*/
#include <seccomp.h>
#include <string.h>
#include "syscalls.h"
%}
struct arch_syscall_table;
%%
@@SYSCALLS_TABLE@@
%%
static int __syscall_offset_value(const struct arch_syscall_table *s,
int offset)
{
return *(int *)((char *)s + offset);
}
static const struct arch_syscall_table *__syscall_lookup_name(const char *name)
{
return in_word_set(name, strlen(name));
}
static const struct arch_syscall_table *__syscall_lookup_num(int num,
int offset_arch)
{
unsigned int i;
for (i = 0; i < sizeof(wordlist)/sizeof(wordlist[0]); i++) {
if (__syscall_offset_value(&wordlist[i], offset_arch) == num)
return &wordlist[i];
}
return NULL;
}
int syscall_resolve_name(const char *name, int offset_arch)
{
const struct arch_syscall_table *entry;
entry = __syscall_lookup_name(name);
if (!entry)
return __NR_SCMP_ERROR;
return __syscall_offset_value(entry, offset_arch);
}
const char *syscall_resolve_num(int num, int offset_arch)
{
const struct arch_syscall_table *entry;
entry = __syscall_lookup_num(num, offset_arch);
if (!entry)
return NULL;
return (stringpool + entry->name);
}
enum scmp_kver syscall_resolve_name_kver(const char *name, int offset_kver)
{
const struct arch_syscall_table *entry;
entry = __syscall_lookup_name(name);
if (!entry)
return __SCMP_KV_NULL;
return __syscall_offset_value(entry, offset_kver);
}
enum scmp_kver syscall_resolve_num_kver(int num,
int offset_arch, int offset_kver)
{
const struct arch_syscall_table *entry;
entry = __syscall_lookup_num(num, offset_arch);
if (!entry)
return __SCMP_KV_NULL;
return __syscall_offset_value(entry, offset_kver);
}
/* DANGER: this is NOT THREAD-SAFE, use only for testing */
const struct arch_syscall_def *syscall_iterate(unsigned int spot, int offset)
{
unsigned int iter;
static struct arch_syscall_def arch_def;
/* DANGER: see the note above, NOT THREAD-SAFE, use only for testing */
arch_def.name = NULL;
arch_def.num = __NR_SCMP_ERROR;
for (iter = 0; iter < sizeof(wordlist)/sizeof(wordlist[0]); iter++) {
if (wordlist[iter].index == spot) {
arch_def.name = stringpool + wordlist[iter].name;
arch_def.num = __syscall_offset_value(&wordlist[iter],
offset);
return &arch_def;
}
}
return &arch_def;
}
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