rt-thread/components/lwp/lwp.h

/*
 * Copyright (c) 2006-2021, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2018-06-29     heyuanjie    first version
 * 2019-10-12     Jesven       Add MMU and userspace support
 * 2020-10-08     Bernard      Architecture and code cleanup
 * 2021-08-26     linzhenxing  add lwp_setcwd\lwp_getcwd
 */

/*
 * RT-Thread light-weight process
 */
#ifndef __LWP_H__
#define __LWP_H__

#include <stdint.h>

#include <rthw.h>
#include <rtthread.h>
#include <dfs.h>

#include "lwp_pid.h"
#include "lwp_ipc.h"
#include "lwp_signal.h"
#include "lwp_syscall.h"
#include "lwp_avl.h"

#ifdef RT_USING_USERSPACE
#include "lwp_shm.h"

#include "mmu.h"
#include "page.h"
#else
#include "lwp_mpu.h"
#endif
#include "lwp_arch.h"

#ifdef RT_USING_MUSL
#include <locale.h>
typedef int32_t pid_t;
#endif

#ifdef __cplusplus
extern "C" {
#endif

#define LWP_MAGIC           0x5A

#define LWP_TYPE_FIX_ADDR   0x01
#define LWP_TYPE_DYN_ADDR   0x02

#define LWP_ARG_MAX         8

struct rt_lwp
{
#ifdef RT_USING_USERSPACE
    rt_mmu_info mmu_info;
    struct lwp_avl_struct *map_area;
    size_t end_heap;
#else
#ifdef ARCH_MM_MPU
    struct rt_mpu_info mpu_info;
#endif /* ARCH_MM_MPU */
#endif
    uint8_t lwp_type;
    uint8_t reserv[3];

    struct rt_lwp *parent;
    struct rt_lwp *first_child;
    struct rt_lwp *sibling;

    rt_list_t wait_list;
    int32_t  finish;
    int  lwp_ret;

    void *text_entry;
    uint32_t text_size;
    void *data_entry;
    uint32_t data_size;

    int ref;
    void *args;
    uint32_t args_length;
    pid_t pid;
    rt_list_t t_grp;
    struct dfs_fdtable fdt;
    char cmd[RT_NAME_MAX];

    int sa_flags;
    lwp_sigset_t signal;
    lwp_sigset_t signal_mask;
    int signal_mask_bak;
    rt_uint32_t signal_in_process;
    lwp_sighandler_t signal_handler[_LWP_NSIG];

    struct lwp_avl_struct *object_root;
    struct rt_mutex object_mutex;
    struct rt_user_context user_ctx;

    struct rt_wqueue wait_queue; /*for console */

    struct lwp_avl_struct *address_search_head; /* for addressed object fast rearch */
    char working_directory[DFS_PATH_MAX];
#ifdef RT_USING_GDBSERVER
    int debug;
    uint32_t bak_first_ins;
#endif
};

struct rt_lwp *lwp_self(void);

enum lwp_exit_request_type
{
    LWP_EXIT_REQUEST_NONE = 0,
    LWP_EXIT_REQUEST_TRIGGERED,
    LWP_EXIT_REQUEST_IN_PROCESS,
};
void lwp_setcwd(char *buf);
char *lwp_getcwd(void);
void lwp_request_thread_exit(rt_thread_t thread_to_exit);
int  lwp_check_exit_request(void);
void lwp_terminate(struct rt_lwp *lwp);
void lwp_wait_subthread_exit(void);

void lwp_set_thread_area(void *p);
void* rt_cpu_get_thread_idr(void);
void rt_cpu_set_thread_idr(void *p);

int lwp_tid_get(void);
void lwp_tid_put(int tid);
rt_thread_t lwp_tid_get_thread(int tid);
void lwp_tid_set_thread(int tid, rt_thread_t thread);

size_t lwp_user_strlen(const char *s, int *err);

#ifdef RT_USING_USERSPACE
void lwp_mmu_switch(struct rt_thread *thread);
#endif
void lwp_user_setting_save(rt_thread_t thread);
void lwp_user_setting_restore(rt_thread_t thread);

#ifdef RT_USING_USERSPACE
struct __pthread {
    /* Part 1 -- these fields may be external or
     *      * internal (accessed via asm) ABI. Do not change. */
    struct pthread *self;
    uintptr_t *dtv;
    struct pthread *prev, *next; /* non-ABI */
    uintptr_t sysinfo;
    uintptr_t canary, canary2;

    /* Part 2 -- implementation details, non-ABI. */
    int tid;
    int errno_val;
    volatile int detach_state;
    volatile int cancel;
    volatile unsigned char canceldisable, cancelasync;
    unsigned char tsd_used:1;
    unsigned char dlerror_flag:1;
    unsigned char *map_base;
    size_t map_size;
    void *stack;
    size_t stack_size;
    size_t guard_size;
    void *result;
    struct __ptcb *cancelbuf;
    void **tsd;
    struct {
        volatile void *volatile head;
        long off;
        volatile void *volatile pending;
    } robust_list;
    volatile int timer_id;
    locale_t locale;
    volatile int killlock[1];
    char *dlerror_buf;
    void *stdio_locks;

    /* Part 3 -- the positions of these fields relative to
     *      * the end of the structure is external and internal ABI. */
    uintptr_t canary_at_end;
    uintptr_t *dtv_copy;
};
#endif

/* for futex op */
#define FUTEX_WAIT  0
#define FUTEX_WAKE  1

/* for pmutex op */
#define PMUTEX_INIT    0
#define PMUTEX_LOCK    1
#define PMUTEX_UNLOCK  2
#define PMUTEX_DESTROY 3

#ifdef __cplusplus
}
#endif

#define AUX_ARRAY_ITEMS_NR 6

/* aux key */
#define AT_NULL 0
#define AT_IGNORE 1
#define AT_EXECFD 2
#define AT_PHDR 3
#define AT_PHENT 4
#define AT_PHNUM 5
#define AT_PAGESZ 6
#define AT_BASE 7
#define AT_FLAGS 8
#define AT_ENTRY 9
#define AT_NOTELF 10
#define AT_UID 11
#define AT_EUID 12
#define AT_GID 13
#define AT_EGID 14
#define AT_CLKTCK 17
#define AT_PLATFORM 15
#define AT_HWCAP 16
#define AT_FPUCW 18
#define AT_DCACHEBSIZE 19
#define AT_ICACHEBSIZE 20
#define AT_UCACHEBSIZE 21
#define AT_IGNOREPPC 22
#define AT_SECURE 23
#define AT_BASE_PLATFORM 24
#define AT_RANDOM 25
#define AT_HWCAP2 26
#define AT_EXECFN 31

struct process_aux_item
{
    size_t key;
    size_t value;
};

struct process_aux
{
    struct process_aux_item item[AUX_ARRAY_ITEMS_NR];
};

struct lwp_args_info
{
    char **argv;
    char **envp;
    int argc;
    int envc;
    int size;
};

#endif