78 lines
1.5 KiB
C
78 lines
1.5 KiB
C
/*
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* Copyright 2002-2011, The Haiku Team. All rights reserved.
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* Distributed under the terms of the MIT License.
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*
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* Copyright 2002, Travis Geiselbrecht. All rights reserved.
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* Distributed under the terms of the NewOS License.
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*/
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#ifndef _KERNEL_ARCH_x86_THREAD_H
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#define _KERNEL_ARCH_x86_THREAD_H
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#include <arch/cpu.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct sigaction;
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struct iframe* x86_get_user_iframe(void);
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struct iframe* x86_get_current_iframe(void);
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struct iframe* x86_get_thread_user_iframe(Thread* thread);
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phys_addr_t x86_next_page_directory(Thread* from, Thread* to);
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void x86_initial_return_to_userland(Thread* thread, struct iframe* iframe);
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void x86_restart_syscall(struct iframe* frame);
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void x86_set_tls_context(Thread* thread);
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static inline Thread*
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arch_thread_get_current_thread(void)
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{
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addr_t addr;
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__asm__("mov %%gs:0, %0" : "=r"(addr));
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return (Thread*)addr;
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}
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#ifdef __x86_64__
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static inline void
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arch_thread_set_current_thread(Thread* t)
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{
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// Point GS segment base at thread architecture data.
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t->arch_info.thread = t;
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x86_write_msr(IA32_MSR_GS_BASE, (addr_t)&t->arch_info);
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}
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#else // __x86_64__
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// override empty macro
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#undef arch_syscall_64_bit_return_value
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void arch_syscall_64_bit_return_value(void);
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static inline void
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arch_thread_set_current_thread(Thread* t)
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{
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asm volatile("mov %0, %%gs:0" : : "r" (t) : "memory");
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}
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#endif // __x86_64__
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#ifdef __cplusplus
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}
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#endif
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#endif /* _KERNEL_ARCH_x86_THREAD_H */
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