From 9595fb8cd595028bece5174e7eddf660ae3dcc10 Mon Sep 17 00:00:00 2001 From: Waldemar Brodkorb Date: Thu, 31 May 2018 01:04:17 +0200 Subject: risc-v: initial 64 bit port, static only (no TLS/NPTL) Only a simple hello world is tested in qemu system emulation. --- libc/sysdeps/linux/riscv64/sys/ucontext.h | 106 ++++++++++++++++++++++++++++++ 1 file changed, 106 insertions(+) create mode 100644 libc/sysdeps/linux/riscv64/sys/ucontext.h (limited to 'libc/sysdeps/linux/riscv64/sys/ucontext.h') diff --git a/libc/sysdeps/linux/riscv64/sys/ucontext.h b/libc/sysdeps/linux/riscv64/sys/ucontext.h new file mode 100644 index 000000000..2a80a853c --- /dev/null +++ b/libc/sysdeps/linux/riscv64/sys/ucontext.h @@ -0,0 +1,106 @@ +/* struct ucontext definition, RISC-V version. + Copyright (C) 1997-2018 Free Software Foundation, Inc. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + . */ + +/* Don't rely on this, the interface is currently messed up and may need to + be broken to be fixed. */ +#ifndef _SYS_UCONTEXT_H +#define _SYS_UCONTEXT_H 1 + +#include + +typedef unsigned long int __riscv_mc_gp_state[32]; + +#ifdef __USE_MISC +# define NGREG 32 + +# define REG_PC 0 +# define REG_RA 1 +# define REG_SP 2 +# define REG_TP 4 +# define REG_S0 8 +# define REG_S1 9 +# define REG_A0 10 +# define REG_S2 18 +# define REG_NARGS 8 + +typedef unsigned long int greg_t; + +/* Container for all general registers. */ +typedef __riscv_mc_gp_state gregset_t; + +/* Container for floating-point state. */ +typedef union __riscv_mc_fp_state fpregset_t; +#endif + +struct __riscv_mc_f_ext_state + { + unsigned int __f[32]; + unsigned int __fcsr; + }; + +struct __riscv_mc_d_ext_state + { + unsigned long long int __f[32]; + unsigned int __fcsr; + }; + +struct __riscv_mc_q_ext_state + { + unsigned long long int __f[64] __attribute__ ((__aligned__ (16))); + unsigned int __fcsr; + /* Reserved for expansion of sigcontext structure. Currently zeroed + upon signal, and must be zero upon sigreturn. */ + unsigned int __glibc_reserved[3]; + }; + +union __riscv_mc_fp_state + { + struct __riscv_mc_f_ext_state __f; + struct __riscv_mc_d_ext_state __d; + struct __riscv_mc_q_ext_state __q; + }; + +typedef struct mcontext_t + { + __riscv_mc_gp_state __gregs; + union __riscv_mc_fp_state __fpregs; + } mcontext_t; + +/* Userlevel context. */ +typedef struct ucontext_t + { + unsigned long int __uc_flags; + struct ucontext_t *uc_link; + stack_t uc_stack; + sigset_t uc_sigmask; + /* There's some padding here to allow sigset_t to be expanded in the + future. Though this is unlikely, other architectures put uc_sigmask + at the end of this structure and explicitly state it can be + expanded, so we didn't want to box ourselves in here. */ + char __glibc_reserved[1024 / 8 - sizeof (sigset_t)]; + /* We can't put uc_sigmask at the end of this structure because we need + to be able to expand sigcontext in the future. For example, the + vector ISA extension will almost certainly add ISA state. We want + to ensure all user-visible ISA state can be saved and restored via a + ucontext, so we're putting this at the end in order to allow for + infinite extensibility. Since we know this will be extended and we + assume sigset_t won't be extended an extreme amount, we're + prioritizing this. */ + mcontext_t uc_mcontext; + } ucontext_t; + +#endif /* sys/ucontext.h */ -- cgit v1.2.3