From b74baf4ad05b5ebe3152592fb2fa80d51681392a Mon Sep 17 00:00:00 2001 From: Huacai Chen Date: Tue, 31 May 2022 18:04:11 +0800 Subject: LoongArch: Add signal handling support Add ucontext/sigcontext definition and signal handling support for LoongArch. Cc: Eric Biederman Cc: Al Viro Reviewed-by: WANG Xuerui Reviewed-by: Jiaxun Yang Signed-off-by: Huacai Chen --- arch/loongarch/include/uapi/asm/sigcontext.h | 44 ++++++++++++++++++++++++++++ arch/loongarch/include/uapi/asm/signal.h | 13 ++++++++ arch/loongarch/include/uapi/asm/ucontext.h | 35 ++++++++++++++++++++++ 3 files changed, 92 insertions(+) create mode 100644 arch/loongarch/include/uapi/asm/sigcontext.h create mode 100644 arch/loongarch/include/uapi/asm/signal.h create mode 100644 arch/loongarch/include/uapi/asm/ucontext.h (limited to 'arch/loongarch/include') diff --git a/arch/loongarch/include/uapi/asm/sigcontext.h b/arch/loongarch/include/uapi/asm/sigcontext.h new file mode 100644 index 000000000000..52e49b8bf4be --- /dev/null +++ b/arch/loongarch/include/uapi/asm/sigcontext.h @@ -0,0 +1,44 @@ +/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ +/* + * Author: Hanlu Li + * Huacai Chen + * + * Copyright (C) 2020-2022 Loongson Technology Corporation Limited + */ +#ifndef _UAPI_ASM_SIGCONTEXT_H +#define _UAPI_ASM_SIGCONTEXT_H + +#include +#include + +/* FP context was used */ +#define SC_USED_FP (1 << 0) +/* Address error was due to memory load */ +#define SC_ADDRERR_RD (1 << 30) +/* Address error was due to memory store */ +#define SC_ADDRERR_WR (1 << 31) + +struct sigcontext { + __u64 sc_pc; + __u64 sc_regs[32]; + __u32 sc_flags; + __u64 sc_extcontext[0] __attribute__((__aligned__(16))); +}; + +#define CONTEXT_INFO_ALIGN 16 +struct sctx_info { + __u32 magic; + __u32 size; + __u64 padding; /* padding to 16 bytes */ +}; + +/* FPU context */ +#define FPU_CTX_MAGIC 0x46505501 +#define FPU_CTX_ALIGN 8 +struct fpu_context { + __u64 regs[32]; + __u64 fcc; + __u32 fcsr; +}; + +#endif /* _UAPI_ASM_SIGCONTEXT_H */ diff --git a/arch/loongarch/include/uapi/asm/signal.h b/arch/loongarch/include/uapi/asm/signal.h new file mode 100644 index 000000000000..992d965aa13f --- /dev/null +++ b/arch/loongarch/include/uapi/asm/signal.h @@ -0,0 +1,13 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +/* + * Copyright (C) 2020-2022 Loongson Technology Corporation Limited + */ +#ifndef _UAPI_ASM_SIGNAL_H +#define _UAPI_ASM_SIGNAL_H + +#define MINSIGSTKSZ 4096 +#define SIGSTKSZ 16384 + +#include + +#endif diff --git a/arch/loongarch/include/uapi/asm/ucontext.h b/arch/loongarch/include/uapi/asm/ucontext.h new file mode 100644 index 000000000000..12577e22b1c7 --- /dev/null +++ b/arch/loongarch/include/uapi/asm/ucontext.h @@ -0,0 +1,35 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +#ifndef __LOONGARCH_UAPI_ASM_UCONTEXT_H +#define __LOONGARCH_UAPI_ASM_UCONTEXT_H + +/** + * struct ucontext - user context structure + * @uc_flags: + * @uc_link: + * @uc_stack: + * @uc_mcontext: holds basic processor state + * @uc_sigmask: + * @uc_extcontext: holds extended processor state + */ +struct ucontext { + unsigned long uc_flags; + struct ucontext *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. */ + __u8 __unused[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. */ + struct sigcontext uc_mcontext; +}; + +#endif /* __LOONGARCH_UAPI_ASM_UCONTEXT_H */ -- cgit v1.2.3