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111 lines
3.4 KiB
C
111 lines
3.4 KiB
C
/* struct ucontext definition, RISC-V version.
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Copyright (C) 1997-2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<https://www.gnu.org/licenses/>. */
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/* Don't rely on this, the interface is currently messed up and may need to
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be broken to be fixed. */
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#ifndef _SYS_UCONTEXT_H
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#define _SYS_UCONTEXT_H 1
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#include <features.h>
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#include <bits/types/sigset_t.h>
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#include <bits/types/stack_t.h>
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typedef unsigned long int __riscv_mc_gp_state[32];
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#ifdef __USE_MISC
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# define NGREG 32
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# define REG_PC 0
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# define REG_RA 1
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# define REG_SP 2
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# define REG_TP 4
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# define REG_S0 8
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# define REG_S1 9
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# define REG_A0 10
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# define REG_S2 18
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# define REG_NARGS 8
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typedef unsigned long int greg_t;
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/* Container for all general registers. */
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typedef __riscv_mc_gp_state gregset_t;
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/* Container for floating-point state. */
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typedef union __riscv_mc_fp_state fpregset_t;
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#endif
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struct __riscv_mc_f_ext_state
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{
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unsigned int __f[32];
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unsigned int __fcsr;
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};
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struct __riscv_mc_d_ext_state
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{
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unsigned long long int __f[32];
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unsigned int __fcsr;
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};
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struct __riscv_mc_q_ext_state
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{
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unsigned long long int __f[64] __attribute__ ((__aligned__ (16)));
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unsigned int __fcsr;
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/* Reserved for expansion of sigcontext structure. Currently zeroed
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upon signal, and must be zero upon sigreturn. */
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unsigned int __glibc_reserved[3];
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};
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union __riscv_mc_fp_state
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{
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struct __riscv_mc_f_ext_state __f;
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struct __riscv_mc_d_ext_state __d;
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struct __riscv_mc_q_ext_state __q;
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};
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typedef struct mcontext_t
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{
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__riscv_mc_gp_state __gregs;
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union __riscv_mc_fp_state __fpregs;
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} mcontext_t;
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/* Userlevel context. */
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typedef struct ucontext_t
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{
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unsigned long int __uc_flags;
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struct ucontext_t *uc_link;
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stack_t uc_stack;
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sigset_t uc_sigmask;
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/* There's some padding here to allow sigset_t to be expanded in the
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future. Though this is unlikely, other architectures put uc_sigmask
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at the end of this structure and explicitly state it can be
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expanded, so we didn't want to box ourselves in here. */
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char __glibc_reserved[1024 / 8 - sizeof (sigset_t)];
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/* We can't put uc_sigmask at the end of this structure because we need
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to be able to expand sigcontext in the future. For example, the
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vector ISA extension will almost certainly add ISA state. We want
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to ensure all user-visible ISA state can be saved and restored via a
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ucontext, so we're putting this at the end in order to allow for
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infinite extensibility. Since we know this will be extended and we
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assume sigset_t won't be extended an extreme amount, we're
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prioritizing this. */
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mcontext_t uc_mcontext;
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} ucontext_t;
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#endif /* sys/ucontext.h */
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