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2ffbe7aaca
* define compat_flock, compat_timespec, compat_stat, compat_attr_info, compat_fs_info, compat_fd_info to be used for respective 32-bit types of syscalls in compatibility mode. * handle 32-bit types in common_fcntl(), _user_read_stat(), _user_stat_attr(), _user_read_index_stat, _user_read_fs_info, _user_write_fs_info, _user_get_next_fd_info, other syscalls are compatible as is. Change-Id: I5b372169fe142f67b81fd6c27e0627d5119ba687
75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
/*
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* Copyright 2018, Haiku Inc. All rights reserved.
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*
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _KERNEL_COMPAT_FCNTL_H
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#define _KERNEL_COMPAT_FCNTL_H
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#include <fcntl.h>
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struct compat_flock {
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short l_type;
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short l_whence;
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off_t l_start;
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off_t l_len;
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pid_t l_pid;
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} _PACKED;
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static_assert(sizeof(struct compat_flock) == 24,
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"size of compat_flock mismatch");
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inline status_t
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copy_ref_var_from_user(struct flock* userFlock, struct flock &flock)
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{
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if (!IS_USER_ADDRESS(userFlock))
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return B_BAD_ADDRESS;
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Thread* thread = thread_get_current_thread();
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bool compatMode = (thread->flags & THREAD_FLAGS_COMPAT_MODE) != 0;
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if (compatMode) {
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compat_flock compat_flock;
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if (user_memcpy(&compat_flock, userFlock, sizeof(compat_flock)) < B_OK)
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return B_BAD_ADDRESS;
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flock.l_type = compat_flock.l_type;
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flock.l_whence = compat_flock.l_whence;
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flock.l_start = compat_flock.l_start;
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flock.l_len = compat_flock.l_len;
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flock.l_pid = compat_flock.l_pid;
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} else {
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if (user_memcpy(&flock, userFlock, sizeof(struct flock)) < B_OK)
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return B_BAD_ADDRESS;
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}
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return B_OK;
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}
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inline status_t
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copy_ref_var_to_user(struct flock &flock, struct flock* userFlock)
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{
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if (!IS_USER_ADDRESS(userFlock))
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return B_BAD_ADDRESS;
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Thread* thread = thread_get_current_thread();
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bool compatMode = (thread->flags & THREAD_FLAGS_COMPAT_MODE) != 0;
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if (compatMode) {
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compat_flock compat_flock;
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compat_flock.l_type = flock.l_type;
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compat_flock.l_whence = flock.l_whence;
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compat_flock.l_start = flock.l_start;
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compat_flock.l_len = flock.l_len;
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compat_flock.l_pid = flock.l_pid;
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if (user_memcpy(userFlock, &compat_flock, sizeof(compat_flock)) < B_OK)
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return B_BAD_ADDRESS;
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} else {
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if (user_memcpy(userFlock, &flock, sizeof(flock)) < B_OK)
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return B_BAD_ADDRESS;
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}
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return B_OK;
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}
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#endif // _KERNEL_COMPAT_FCNTL_H
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