240 lines
7.0 KiB
C
240 lines
7.0 KiB
C
/*
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* Copyright (c) 2006-2020, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2019-10-28 Jesven first version
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* 2021-02-12 lizhirui add 64-bit support for lwp_brk
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* 2023-09-19 Shell add lwp_user_memory_remap_to_kernel
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*/
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#ifndef __LWP_USER_MM_H__
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#define __LWP_USER_MM_H__
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#include <rthw.h>
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#include <rtthread.h>
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#ifdef ARCH_MM_MMU
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#include <lwp.h>
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#include <mmu.h>
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#include <mm_aspace.h>
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#include <mm_fault.h>
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#include <mm_page.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define LWP_MAP_FLAG_NONE 0x0000
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#define LWP_MAP_FLAG_NOCACHE 0x0001
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#define LWP_MAP_FLAG_MAP_FIXED 0x00010000ul
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#define LWP_MAP_FLAG_PREFETCH 0x00020000ul
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/**
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* @brief Map files or devices into memory
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* It will create a new mapping in the virtual address space of the target lwp
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*
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* @param lwp target process
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* @param addr address from user space
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* @param length length in bytes of mapping
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* @param prot protect attribution of mapping
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* @param flags flags of control
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* @param fd file descriptor
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* @param pgoffset offset to fd in 4096 bytes unit
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* @return void* the address is successful, otherwise return MAP_FAILED
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*/
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void* lwp_mmap2(struct rt_lwp *lwp, void *addr, size_t length, int prot, int flags, int fd, off_t pgoffset);
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/**
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* @brief Unmap memory region in user space
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*
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* @param lwp target process
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* @param addr address to unmap
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* @param length length in bytes of unmapping
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* @return int errno
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*/
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int lwp_munmap(struct rt_lwp *lwp, void *addr, size_t length);
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void *lwp_mremap(struct rt_lwp *lwp, void *old_address, size_t old_size,
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size_t new_size, int flags, void *new_address);
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/**
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* @brief Test if address from user is accessible address by user
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*
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* @param lwp target process
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* @param addr address from user space
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* @param size the bytes to access
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* @return int RT_FALSE/RT_TRUE
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*/
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int lwp_user_accessible_ext(struct rt_lwp *lwp, void *addr, size_t size);
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/**
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* @brief Test if address from user is accessible address by user
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* Same as lwp_user_accessible_ext except that lwp is current lwp
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*
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* @param addr address from user space
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* @param size the bytes to access
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* @return int RT_FALSE/RT_TRUE
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*/
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int lwp_user_accessable(void *addr, size_t size);
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/**
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* @brief Copy n bytes data from src to dst.
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* Same as std libc memcpy, except that both src and dst may come from
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* user space. lwp_memcpy will test and select the implementation based
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* on the memory attribution on run-time
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*
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* @param dst where the data writes to
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* @param src where the data comes from
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* @param size the bytes to copy
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* @return void* the destination address
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*/
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void *lwp_memcpy(void * __restrict dst, const void * __restrict src, size_t size);
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/**
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* @brief memcpy from address in user address space to kernel space buffer
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*
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* @param lwp target process
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* @param dst kernel space address where the data writes to
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* @param src user space address where the data comes from
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* @param size the bytes to copy
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* @return size_t the bytes copied
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*/
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size_t lwp_data_get(struct rt_lwp *lwp, void *dst, void *src, size_t size);
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/**
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* @brief lwp_data_get except that lwp is current lwp
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*
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* @param dst kernel space address where the data writes to
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* @param src user space address where the data comes from
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* @param size the bytes to copy
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* @return size_t the bytes copied
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*/
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size_t lwp_get_from_user(void *dst, void *src, size_t size);
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/**
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* @brief memcpy from kernel space buffer to address in user address space
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*
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* @param lwp target process
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* @param dst user space address where the data writes to
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* @param src kernel space address where the data comes from
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* @param size the bytes to copy
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* @return size_t the bytes copied
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*/
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size_t lwp_data_put(struct rt_lwp *lwp, void *dst, void *src, size_t size);
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/**
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* @brief lwp_data_put except that lwp is current lwp
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*
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* @param dst user space address where the data writes to
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* @param src kernel space address where the data comes from
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* @param size the bytes to copy
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* @return size_t the bytes copied
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*/
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size_t lwp_put_to_user(void *dst, void *src, size_t size);
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/**
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* @brief memset to address in user address space
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*
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* @param lwp target process
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* @param dst user space address where the data writes to
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* @param c the value to write
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* @param size the bytes to copy
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* @return size_t the bytes written
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*/
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size_t lwp_data_set(struct rt_lwp *lwp, void *dst, int c, size_t size);
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int lwp_user_space_init(struct rt_lwp *lwp, rt_bool_t is_fork);
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void lwp_unmap_user_space(struct rt_lwp *lwp);
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int lwp_unmap_user(struct rt_lwp *lwp, void *va);
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void *lwp_map_user(struct rt_lwp *lwp, void *map_va, size_t map_size, rt_bool_t text);
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void lwp_free_command_line_args(char** argv);
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char** lwp_get_command_line_args(struct rt_lwp *lwp);
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rt_varea_t lwp_map_user_varea(struct rt_lwp *lwp, void *map_va, size_t map_size);
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/* check LWP_MAP_FLAG_* */
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rt_varea_t lwp_map_user_varea_ext(struct rt_lwp *lwp, void *map_va, size_t map_size, size_t flags);
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void *lwp_map_user_phy(struct rt_lwp *lwp, void *map_va, void *map_pa, size_t map_size, rt_bool_t cached);
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int lwp_unmap_user_phy(struct rt_lwp *lwp, void *va);
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rt_base_t lwp_brk(void *addr);
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size_t lwp_user_strlen(const char *s);
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size_t lwp_user_strlen_ext(struct rt_lwp *lwp, const char *s);
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size_t lwp_strlen(struct rt_lwp *lwp, const char *s);
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int lwp_fork_aspace(struct rt_lwp *dest_lwp, struct rt_lwp *src_lwp);
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void lwp_data_cache_flush(struct rt_lwp *lwp, void *vaddr, size_t size);
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static inline void *_lwp_v2p(struct rt_lwp *lwp, void *vaddr)
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{
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return rt_hw_mmu_v2p(lwp->aspace, vaddr);
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}
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static inline void *lwp_v2p(struct rt_lwp *lwp, void *vaddr)
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{
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RD_LOCK(lwp->aspace);
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void *paddr = _lwp_v2p(lwp, vaddr);
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RD_UNLOCK(lwp->aspace);
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return paddr;
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}
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/**
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* @brief Remapping user space memory region to kernel
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*
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* @warning the remapped region in kernel should be unmapped after usage
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*
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* @param lwp target process
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* @param uaddr user space address where the data writes to
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* @param length the bytes to redirect
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* @return void * the redirection address in kernel space
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*/
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void *lwp_user_memory_remap_to_kernel(rt_lwp_t lwp, void *uaddr, size_t length);
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rt_inline rt_size_t lwp_user_mm_flag_to_kernel(int flags)
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{
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rt_size_t k_flags = 0;
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if (flags & MAP_FIXED)
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k_flags |= MMF_MAP_FIXED;
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if (flags & (MAP_PRIVATE | MAP_ANON | MAP_ANONYMOUS))
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k_flags |= MMF_MAP_PRIVATE;
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if (flags & MAP_SHARED)
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k_flags |= MMF_MAP_SHARED;
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return k_flags;
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}
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rt_inline rt_size_t lwp_user_mm_attr_to_kernel(int prot)
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{
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RT_UNUSED(prot);
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rt_size_t k_attr = 0;
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#ifdef IMPL_MPROTECT
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if ((prot & PROT_EXEC) || (prot & PROT_WRITE) ||
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((prot & PROT_READ) && (prot & PROT_WRITE)))
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k_attr = MMU_MAP_U_RWCB;
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else if (prot == PROT_NONE)
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k_attr = MMU_MAP_K_RWCB;
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else
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k_attr = MMU_MAP_U_ROCB;
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#else
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k_attr = MMU_MAP_U_RWCB;
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#endif /* IMPL_MPROTECT */
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return k_attr;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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#endif /*__LWP_USER_MM_H__*/
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