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84 lines
2.9 KiB
C++
84 lines
2.9 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <Kernel/Syscall.h>
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#include <errno.h>
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#include <mman.h>
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#include <stdio.h>
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#include <string.h>
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extern "C" {
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void* serenity_mmap(void* addr, size_t size, int prot, int flags, int fd, off_t offset, size_t alignment, const char* name)
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{
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Syscall::SC_mmap_params params { (u32)addr, size, alignment, prot, flags, fd, offset, { name, name ? strlen(name) : 0 } };
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int rc = syscall(SC_mmap, ¶ms);
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if (rc < 0 && -rc < EMAXERRNO) {
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errno = -rc;
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return MAP_FAILED;
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}
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return (void*)rc;
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}
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void* mmap(void* addr, size_t size, int prot, int flags, int fd, off_t offset)
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{
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return serenity_mmap(addr, size, prot, flags, fd, offset, PAGE_SIZE, nullptr);
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}
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void* mmap_with_name(void* addr, size_t size, int prot, int flags, int fd, off_t offset, const char* name)
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{
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return serenity_mmap(addr, size, prot, flags, fd, offset, PAGE_SIZE, name);
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}
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int munmap(void* addr, size_t size)
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{
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int rc = syscall(SC_munmap, addr, size);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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int mprotect(void* addr, size_t size, int prot)
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{
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int rc = syscall(SC_mprotect, addr, size, prot);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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int set_mmap_name(void* addr, size_t size, const char* name)
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{
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if (!name) {
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errno = EFAULT;
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return -1;
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}
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Syscall::SC_set_mmap_name_params params { addr, size, { name, strlen(name) } };
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int rc = syscall(SC_set_mmap_name, ¶ms);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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int madvise(void* address, size_t size, int advice)
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{
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int rc = syscall(SC_madvise, address, size, advice);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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}
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