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a5d2cfe749
The kernel flushes the memory ranges anyway for CoW and does not assume that the userspace process has anything set up already. So, start with a fresh process for the new mm context. Signed-off-by: Benjamin Berg <benjamin.berg@intel.com> Link: https://patch.msgid.link/20240703134536.1161108-8-benjamin@sipsolutions.net Signed-off-by: Johannes Berg <johannes.berg@intel.com>
50 lines
1.0 KiB
C
50 lines
1.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
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* Copyright (C) 2005 Jeff Dike (jdike@karaya.com)
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*/
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#ifndef __STUB_DATA_H
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#define __STUB_DATA_H
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#include <linux/compiler_types.h>
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#include <as-layout.h>
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#include <sysdep/tls.h>
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#define STUB_NEXT_SYSCALL(s) \
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((struct stub_syscall *) (((unsigned long) s) + (s)->cmd_len))
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enum stub_syscall_type {
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STUB_SYSCALL_UNSET = 0,
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STUB_SYSCALL_MMAP,
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STUB_SYSCALL_MUNMAP,
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STUB_SYSCALL_MPROTECT,
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};
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struct stub_syscall {
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struct {
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unsigned long addr;
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unsigned long length;
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unsigned long offset;
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int fd;
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int prot;
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} mem;
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enum stub_syscall_type syscall;
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};
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struct stub_data {
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unsigned long offset;
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long err, child_err;
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int syscall_data_len;
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/* 128 leaves enough room for additional fields in the struct */
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struct stub_syscall syscall_data[(UM_KERN_PAGE_SIZE - 128) / sizeof(struct stub_syscall)] __aligned(16);
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/* Stack for our signal handlers and for calling into . */
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unsigned char sigstack[UM_KERN_PAGE_SIZE] __aligned(UM_KERN_PAGE_SIZE);
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};
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#endif
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