ucontext.h 1.3 KB

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  1. /* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
  2. /*
  3. * Copyright (C) 2012 ARM Ltd.
  4. * Copyright (C) 2017 SiFive, Inc.
  5. *
  6. * This file was copied from arch/arm64/include/uapi/asm/ucontext.h
  7. */
  8. #ifndef _UAPI_ASM_RISCV_UCONTEXT_H
  9. #define _UAPI_ASM_RISCV_UCONTEXT_H
  10. #include <linux/types.h>
  11. struct ucontext {
  12. unsigned long uc_flags;
  13. struct ucontext *uc_link;
  14. stack_t uc_stack;
  15. sigset_t uc_sigmask;
  16. /* There's some padding here to allow sigset_t to be expanded in the
  17. * future. Though this is unlikely, other architectures put uc_sigmask
  18. * at the end of this structure and explicitly state it can be
  19. * expanded, so we didn't want to box ourselves in here. */
  20. __u8 __unused[1024 / 8 - sizeof(sigset_t)];
  21. /* We can't put uc_sigmask at the end of this structure because we need
  22. * to be able to expand sigcontext in the future. For example, the
  23. * vector ISA extension will almost certainly add ISA state. We want
  24. * to ensure all user-visible ISA state can be saved and restored via a
  25. * ucontext, so we're putting this at the end in order to allow for
  26. * infinite extensibility. Since we know this will be extended and we
  27. * assume sigset_t won't be extended an extreme amount, we're
  28. * prioritizing this. */
  29. struct sigcontext uc_mcontext;
  30. };
  31. #endif /* _UAPI_ASM_RISCV_UCONTEXT_H */