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rt-thread/components/lwp/lwp.c

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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2006-03-12 Bernard first version
* 2018-11-02 heyuanjie fix complie error in iar
*/
#include <rtthread.h>
#include <rthw.h>
#include <dfs_posix.h>
#ifndef RT_USING_DFS
#error "lwp need file system(RT_USING_DFS)"
#endif
#include "lwp.h"
#define DBG_TAG "LWP"
#define DBG_LVL DBG_WARNING
#include <rtdbg.h>
extern void lwp_user_entry(void *args, const void *text, void *data);
/**
* RT-Thread light-weight process
*/
void lwp_set_kernel_sp(uint32_t *sp)
{
struct rt_lwp *user_data;
user_data = (struct rt_lwp *)rt_thread_self()->lwp;
user_data->kernel_sp = sp;
}
uint32_t *lwp_get_kernel_sp(void)
{
struct rt_lwp *user_data;
user_data = (struct rt_lwp *)rt_thread_self()->lwp;
return user_data->kernel_sp;
}
static int lwp_argscopy(struct rt_lwp *lwp, int argc, char **argv)
{
int size = sizeof(int)*3; /* store argc, argv, NULL */
int *args;
char *str;
char **new_argv;
int i;
int len;
for (i = 0; i < argc; i ++)
{
size += (rt_strlen(argv[i]) + 1);
}
size += (sizeof(int) * argc);
args = (int*)rt_malloc(size);
if (args == RT_NULL)
return -1;
str = (char*)((int)args + (argc + 3) * sizeof(int));
new_argv = (char**)&args[2];
args[0] = argc;
args[1] = (int)new_argv;
for (i = 0; i < argc; i ++)
{
len = rt_strlen(argv[i]) + 1;
new_argv[i] = str;
rt_memcpy(str, argv[i], len);
str += len;
}
new_argv[i] = 0;
lwp->args = args;
return 0;
}
static int lwp_load(const char *filename, struct rt_lwp *lwp, uint8_t *load_addr, size_t addr_size)
{
int fd;
uint8_t *ptr;
int result = RT_EOK;
int nbytes;
struct lwp_header header;
struct lwp_chunk chunk;
/* check file name */
RT_ASSERT(filename != RT_NULL);
/* check lwp control block */
RT_ASSERT(lwp != RT_NULL);
if (load_addr != RT_NULL)
{
lwp->lwp_type = LWP_TYPE_FIX_ADDR;
ptr = load_addr;
}
else
{
lwp->lwp_type = LWP_TYPE_DYN_ADDR;
ptr = RT_NULL;
}
/* open lwp */
fd = open(filename, 0, O_RDONLY);
if (fd < 0)
{
dbg_log(DBG_ERROR, "open file:%s failed!\n", filename);
result = -RT_ENOSYS;
goto _exit;
}
/* read lwp header */
nbytes = read(fd, &header, sizeof(struct lwp_header));
if (nbytes != sizeof(struct lwp_header))
{
dbg_log(DBG_ERROR, "read lwp header return error size: %d!\n", nbytes);
result = -RT_EIO;
goto _exit;
}
/* check file header */
if (header.magic != LWP_MAGIC)
{
dbg_log(DBG_ERROR, "erro header magic number: 0x%02X\n", header.magic);
result = -RT_EINVAL;
goto _exit;
}
/* read text chunk info */
nbytes = read(fd, &chunk, sizeof(struct lwp_chunk));
if (nbytes != sizeof(struct lwp_chunk))
{
dbg_log(DBG_ERROR, "read text chunk info failed!\n");
result = -RT_EIO;
goto _exit;
}
dbg_log(DBG_LOG, "chunk name: %s, total len %d, data %d, need space %d!\n",
"text", /*chunk.name*/ chunk.total_len, chunk.data_len, chunk.data_len_space);
/* load text */
{
lwp->text_size = RT_ALIGN(chunk.data_len_space, 4);
if (load_addr)
lwp->text_entry = ptr;
else
{
#ifdef RT_USING_CACHE
lwp->text_entry = (rt_uint8_t *)rt_malloc_align(lwp->text_size, RT_CPU_CACHE_LINE_SZ);
#else
lwp->text_entry = (rt_uint8_t *)rt_malloc(lwp->text_size);
#endif
if (lwp->text_entry == RT_NULL)
{
dbg_log(DBG_ERROR, "alloc text memory faild!\n");
result = -RT_ENOMEM;
goto _exit;
}
else
{
dbg_log(DBG_LOG, "lwp text malloc : %p, size: %d!\n", lwp->text_entry, lwp->text_size);
}
}
dbg_log(DBG_INFO, "load text %d => (0x%08x, 0x%08x)\n", lwp->text_size, (uint32_t)lwp->text_entry, (uint32_t)lwp->text_entry + lwp->text_size);
nbytes = read(fd, lwp->text_entry, chunk.data_len);
if (nbytes != chunk.data_len)
{
dbg_log(DBG_ERROR, "read text region from file failed!\n");
result = -RT_EIO;
goto _exit;
}
#ifdef RT_USING_CACHE
else
{
rt_hw_cpu_dcache_ops(RT_HW_CACHE_FLUSH, lwp->text_entry, lwp->text_size);
rt_hw_cpu_icache_ops(RT_HW_CACHE_INVALIDATE, lwp->text_entry, lwp->text_size);
}
#endif
if (ptr != RT_NULL) ptr += nbytes;
/* skip text hole */
if ((chunk.total_len - sizeof(struct lwp_chunk) - chunk.data_len))
{
dbg_log(DBG_LOG, "skip text hole %d!\n", (chunk.total_len - sizeof(struct lwp_chunk) - chunk.data_len));
lseek(fd, (chunk.total_len - sizeof(struct lwp_chunk) - chunk.data_len), SEEK_CUR);
}
}
/* load data */
nbytes = read(fd, &chunk, sizeof(struct lwp_chunk));
if (nbytes != sizeof(struct lwp_chunk))
{
dbg_log(DBG_ERROR, "read data chunk info failed!\n");
result = -RT_EIO;
goto _exit;
}
dbg_log(DBG_LOG, "chunk name: %s, total len %d, data %d, need space %d!\n",
chunk.name, chunk.total_len, chunk.data_len, chunk.data_len_space);
{
lwp->data_size = RT_ALIGN(chunk.data_len_space, 4);
if (load_addr)
lwp->data = ptr;
else
{
lwp->data = rt_malloc(lwp->data_size);
if (lwp->data == RT_NULL)
{
dbg_log(DBG_ERROR, "alloc data memory faild!\n");
result = -RT_ENOMEM;
goto _exit;
}
else
{
dbg_log(DBG_LOG, "lwp data malloc : %p, size: %d!\n", lwp->data, lwp->data_size);
rt_memset(lwp->data, 0, lwp->data_size);
}
}
dbg_log(DBG_INFO, "load data %d => (0x%08x, 0x%08x)\n", lwp->data_size, (uint32_t)lwp->data, (uint32_t)lwp->data + lwp->data_size);
nbytes = read(fd, lwp->data, chunk.data_len);
if (nbytes != chunk.data_len)
{
dbg_log(DBG_ERROR, "read data region from file failed!\n");
result = -RT_ERROR;
goto _exit;
}
}
_exit:
if (fd >= 0)
close(fd);
if (result != RT_EOK)
{
if (lwp->lwp_type == LWP_TYPE_DYN_ADDR)
{
dbg_log(DBG_ERROR, "lwp dynamic load faild, %d\n", result);
if (lwp->text_entry)
{
dbg_log(DBG_LOG, "lwp text free: %p\n", lwp->text_entry);
#ifdef RT_USING_CACHE
rt_free_align(lwp->text_entry);
#else
rt_free(lwp->text_entry);
#endif
}
if (lwp->data)
{
dbg_log(DBG_LOG, "lwp data free: %p\n", lwp->data);
rt_free(lwp->data);
}
}
}
return result;
}
static void lwp_cleanup(struct rt_thread *tid)
{
struct rt_lwp *lwp;
dbg_log(DBG_INFO, "thread: %s, stack_addr: %08X\n", tid->name, tid->stack_addr);
lwp = (struct rt_lwp *)tid->lwp;
if (lwp->lwp_type == LWP_TYPE_DYN_ADDR)
{
dbg_log(DBG_INFO, "dynamic lwp\n");
if (lwp->text_entry)
{
dbg_log(DBG_LOG, "lwp text free: %p\n", lwp->text_entry);
#ifdef RT_USING_CACHE
rt_free_align(lwp->text_entry);
#else
rt_free(lwp->text_entry);
#endif
}
if (lwp->data)
{
dbg_log(DBG_LOG, "lwp data free: %p\n", lwp->data);
rt_free(lwp->data);
}
}
dbg_log(DBG_LOG, "lwp free memory pages\n");
rt_lwp_mem_deinit(lwp);
/* cleanup fd table */
rt_free(lwp->fdt.fds);
rt_free(lwp->args);
dbg_log(DBG_LOG, "lwp free: %p\n", lwp);
rt_free(lwp);
/* TODO: cleanup fd table */
}
static void lwp_thread(void *parameter)
{
rt_thread_t tid;
struct rt_lwp *lwp;
lwp = (struct rt_lwp *)parameter;
rt_lwp_mem_init(lwp);
tid = rt_thread_self();
tid->lwp = lwp;
tid->cleanup = lwp_cleanup;
lwp_user_entry(lwp->args, lwp->text_entry, lwp->data);
}
struct rt_lwp *rt_lwp_self(void)
{
return (struct rt_lwp *)rt_thread_self()->lwp;
}
int exec(char *filename, int argc, char **argv)
{
struct rt_lwp *lwp;
int result;
if (filename == RT_NULL)
return -RT_ERROR;
lwp = (struct rt_lwp *)rt_malloc(sizeof(struct rt_lwp));
if (lwp == RT_NULL)
{
dbg_log(DBG_ERROR, "lwp struct out of memory!\n");
return -RT_ENOMEM;
}
dbg_log(DBG_INFO, "lwp malloc : %p, size: %d!\n", lwp, sizeof(struct rt_lwp));
rt_memset(lwp, 0, sizeof(*lwp));
if (lwp_argscopy(lwp, argc, argv) != 0)
{
rt_free(lwp);
return -ENOMEM;
}
result = lwp_load(filename, lwp, RT_NULL, 0);
if (result == RT_EOK)
{
rt_thread_t tid;
tid = rt_thread_create("user", lwp_thread, (void *)lwp,
1024 * 4, 2, 200);
if (tid != RT_NULL)
{
dbg_log(DBG_LOG, "lwp kernel => (0x%08x, 0x%08x)\n", (rt_uint32_t)tid->stack_addr, (rt_uint32_t)tid->stack_addr + tid->stack_size);
rt_thread_startup(tid);
return RT_EOK;
}
else
{
#ifdef RT_USING_CACHE
rt_free_align(lwp->text_entry);
#else
rt_free(lwp->text_entry);
#endif
rt_free(lwp->data);
}
}
rt_free(lwp->args);
rt_free(lwp);
return -RT_ERROR;
}
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