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211f71325a
x86_userspace_thread_exit() is a stub originally placed at the bottom of each thread user stack that ensures any thread invokes exit_thread() upon returning from its main higher level function. Putting anything that is expected to be executed on a stack causes problems when implementing data execution prevention. Code of x86_userspace_thread_exit() is now moved to commpage which seems to be much more appropriate place for it.
25 lines
919 B
C
25 lines
919 B
C
/*
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* Copyright 2007, Travis Geiselbrecht. All rights reserved.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _SYSTEM_ARCH_x86_COMMPAGE_DEFS_H
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#define _SYSTEM_ARCH_x86_COMMPAGE_DEFS_H
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#ifndef _SYSTEM_COMMPAGE_DEFS_H
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# error Must not be included directly. Include <commpage_defs.h> instead!
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#endif
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#define COMMPAGE_ENTRY_X86_SYSCALL (COMMPAGE_ENTRY_FIRST_ARCH_SPECIFIC + 0)
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#define COMMPAGE_ENTRY_X86_MEMCPY (COMMPAGE_ENTRY_FIRST_ARCH_SPECIFIC + 1)
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#define COMMPAGE_ENTRY_X86_MEMSET (COMMPAGE_ENTRY_FIRST_ARCH_SPECIFIC + 2)
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#define COMMPAGE_ENTRY_X86_SIGNAL_HANDLER \
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(COMMPAGE_ENTRY_FIRST_ARCH_SPECIFIC + 3)
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#define COMMPAGE_ENTRY_X86_SIGNAL_HANDLER_BEOS \
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(COMMPAGE_ENTRY_FIRST_ARCH_SPECIFIC + 4)
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#define COMMPAGE_ENTRY_X86_THREAD_EXIT \
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(COMMPAGE_ENTRY_FIRST_ARCH_SPECIFIC + 5)
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#define ARCH_USER_COMMPAGE_ADDR (0xffff0000)
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#endif /* _SYSTEM_ARCH_x86_COMMPAGE_DEFS_H */
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