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authorWaldemar Brodkorb <wbx@openadk.org>2024-03-03 05:15:14 +0100
committerWaldemar Brodkorb <wbx@openadk.org>2024-03-03 05:15:50 +0100
commit1be78c337c45d8a090ae9c658a9146b5ada620b1 (patch)
treec2057ff3b5fd25856e39916a64acd4cb642926d7 /libc/sysdeps/linux/riscv32/sys/ucontext.h
parent5e99f71185dc0ef42d4e8c9972cf57f76df5df04 (diff)
riscv32: decouple from riscv64
Diffstat (limited to 'libc/sysdeps/linux/riscv32/sys/ucontext.h')
-rw-r--r--libc/sysdeps/linux/riscv32/sys/ucontext.h108
1 files changed, 108 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/riscv32/sys/ucontext.h b/libc/sysdeps/linux/riscv32/sys/ucontext.h
new file mode 100644
index 000000000..2893ff359
--- /dev/null
+++ b/libc/sysdeps/linux/riscv32/sys/ucontext.h
@@ -0,0 +1,108 @@
+/* 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
+ <http://www.gnu.org/licenses/>. */
+
+/* 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 <features.h>
+#include <signal.h>
+#include <bits/sigcontext.h>
+
+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 */