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John Baldwin
4f876cec30
Similar to arm64, riscv's pcb embeds a copy of the floating point registers and is too large to store directly in struct mdthread as is done on amd64. Instead, use a separate UMA zone for pcbs. riscv's floating point state is not as large as arm64's, so its pcb is also somewhat smaller and a single 4k page can hold 6 pcbs. Reviewed by: kib, jrtc27 Sponsored by: AFRL, DARPA Pull Request: https://ron-dev.freebsd.org/FreeBSD/src/pulls/23
67 lines
2.5 KiB
C
67 lines
2.5 KiB
C
/*-
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* Copyright (c) 2016 Ruslan Bukin <[email protected]>
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* All rights reserved.
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*
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* Portions of this software were developed by SRI International and the
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* University of Cambridge Computer Laboratory under DARPA/AFRL contract
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* FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
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*
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* Portions of this software were developed by the University of Cambridge
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* Computer Laboratory as part of the CTSRD Project, with support from the
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* UK Higher Education Innovation Fund (HEIF).
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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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* 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
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR 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
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _MACHINE_STACK_H_
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#define _MACHINE_STACK_H_
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#define INKERNEL(va) ((va) >= VM_MIN_KERNEL_ADDRESS && \
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(va) <= VM_MAX_KERNEL_ADDRESS)
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struct unwind_state {
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uintptr_t fp;
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uintptr_t sp;
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uintptr_t pc;
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};
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bool unwind_frame(struct thread *, struct unwind_state *);
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#ifdef _SYS_PROC_H_
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/* Get the current kernel thread stack usage. */
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#define GET_STACK_USAGE(total, used) do { \
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struct thread *td = curthread; \
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(total) = ptoa(td->td_kstack_pages); \
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(used) = td->td_kstack + (total) - (char *)&td; \
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} while (0)
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static __inline bool
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kstack_contains(struct thread *td, vm_offset_t va, size_t len)
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{
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return (va >= (vm_offset_t)td->td_kstack && va + len >= va &&
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va + len <= (vm_offset_t)td_kstack_top(td));
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}
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#endif /* _SYS_PROC_H_ */
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#endif /* !_MACHINE_STACK_H_ */
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