/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
/*
 * Copyright (C) 2012 Regents of the University of California
 */

#ifndef _UAPI_ASM_RISCV_PTRACE_H
#define _UAPI_ASM_RISCV_PTRACE_H

#ifndef __ASSEMBLER__

#include <linux/types.h>
#include <linux/const.h>

#define PTRACE_GETFDPIC         33

#define PTRACE_GETFDPIC_EXEC    0
#define PTRACE_GETFDPIC_INTERP  1

/*
 * User-mode register state for core dumps, ptrace, sigcontext
 *
 * This decouples struct pt_regs from the userspace ABI.
 * struct user_regs_struct must form a prefix of struct pt_regs.
 */
struct user_regs_struct {
        unsigned long pc;
        unsigned long ra;
        unsigned long sp;
        unsigned long gp;
        unsigned long tp;
        unsigned long t0;
        unsigned long t1;
        unsigned long t2;
        unsigned long s0;
        unsigned long s1;
        unsigned long a0;
        unsigned long a1;
        unsigned long a2;
        unsigned long a3;
        unsigned long a4;
        unsigned long a5;
        unsigned long a6;
        unsigned long a7;
        unsigned long s2;
        unsigned long s3;
        unsigned long s4;
        unsigned long s5;
        unsigned long s6;
        unsigned long s7;
        unsigned long s8;
        unsigned long s9;
        unsigned long s10;
        unsigned long s11;
        unsigned long t3;
        unsigned long t4;
        unsigned long t5;
        unsigned long t6;
};

struct __riscv_f_ext_state {
        __u32 f[32];
        __u32 fcsr;
};

struct __riscv_d_ext_state {
        __u64 f[32];
        __u32 fcsr;
};

struct __riscv_q_ext_state {
        __u64 f[64] __attribute__((aligned(16)));
        __u32 fcsr;
        /*
         * Reserved for expansion of sigcontext structure.  Currently zeroed
         * upon signal, and must be zero upon sigreturn.
         */
        __u32 reserved[3];
};

struct __riscv_ctx_hdr {
        __u32 magic;
        __u32 size;
};

struct __riscv_extra_ext_header {
        __u32 __padding[129] __attribute__((aligned(16)));
        /*
         * Reserved for expansion of sigcontext structure.  Currently zeroed
         * upon signal, and must be zero upon sigreturn.
         */
        __u32 reserved;
        struct __riscv_ctx_hdr hdr;
};

union __riscv_fp_state {
        struct __riscv_f_ext_state f;
        struct __riscv_d_ext_state d;
        struct __riscv_q_ext_state q;
};

struct __riscv_v_ext_state {
        unsigned long vstart;
        unsigned long vl;
        unsigned long vtype;
        unsigned long vcsr;
        unsigned long vlenb;
        void *datap;
        /*
         * In signal handler, datap will be set a correct user stack offset
         * and vector registers will be copied to the address of datap
         * pointer.
         */
};

struct __riscv_v_regset_state {
        unsigned long vstart;
        unsigned long vl;
        unsigned long vtype;
        unsigned long vcsr;
        unsigned long vlenb;
        char vreg[];
};

/*
 * According to spec: The number of bits in a single vector register,
 * VLEN >= ELEN, which must be a power of 2, and must be no greater than
 * 2^16 = 65536bits = 8192bytes
 */
#define RISCV_MAX_VLENB (8192)

struct __sc_riscv_cfi_state {
        unsigned long ss_ptr;   /* shadow stack pointer */
};

#define PTRACE_CFI_LP_EN_BIT    0
#define PTRACE_CFI_LP_LOCK_BIT  1
#define PTRACE_CFI_ELP_BIT      2
#define PTRACE_CFI_SS_EN_BIT    3
#define PTRACE_CFI_SS_LOCK_BIT  4
#define PTRACE_CFI_SS_PTR_BIT   5

#define PTRACE_CFI_LP_EN_STATE          _BITUL(PTRACE_CFI_LP_EN_BIT)
#define PTRACE_CFI_LP_LOCK_STATE        _BITUL(PTRACE_CFI_LP_LOCK_BIT)
#define PTRACE_CFI_ELP_STATE            _BITUL(PTRACE_CFI_ELP_BIT)
#define PTRACE_CFI_SS_EN_STATE          _BITUL(PTRACE_CFI_SS_EN_BIT)
#define PTRACE_CFI_SS_LOCK_STATE        _BITUL(PTRACE_CFI_SS_LOCK_BIT)
#define PTRACE_CFI_SS_PTR_STATE         _BITUL(PTRACE_CFI_SS_PTR_BIT)

#define PRACE_CFI_STATE_INVALID_MASK    ~(PTRACE_CFI_LP_EN_STATE | \
                                          PTRACE_CFI_LP_LOCK_STATE | \
                                          PTRACE_CFI_ELP_STATE | \
                                          PTRACE_CFI_SS_EN_STATE | \
                                          PTRACE_CFI_SS_LOCK_STATE | \
                                          PTRACE_CFI_SS_PTR_STATE)

struct __cfi_status {
        __u64 cfi_state;
};

struct user_cfi_state {
        struct __cfi_status     cfi_status;
        __u64 shstk_ptr;
};

#endif /* __ASSEMBLER__ */

#endif /* _UAPI_ASM_RISCV_PTRACE_H */