/****************************************************************************
* apps/examples/elf/elf_main.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <sys/boardctl.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
#include <unistd.h>
#include <string.h>
#include <pthread.h>
#include <debug.h>
#include <errno.h>
#include <nuttx/symtab.h>
#include <nuttx/drivers/ramdisk.h>
#include <nuttx/binfmt/binfmt.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Check configuration. This is not all of the configuration settings that
* are required -- only the more obvious.
*/
#ifdef CONFIG_BINFMT_DISABLE
# error "The binary loader is disabled (CONFIG_BINFMT_DISABLE)!"
#endif
#ifndef CONFIG_ELF
# error "You must select CONFIG_ELF in your configuration file"
#endif
#ifdef CONFIG_DISABLE_MOUNTPOINT
# error "You must not disable mountpoints via CONFIG_DISABLE_MOUNTPOINT in your configuration file"
#endif
#if defined(CONFIG_EXAMPLES_ELF_ROMFS)
/* Describe the ROMFS file system */
# define SECTORSIZE 512
# define NSECTORS(b) (((b) + SECTORSIZE - 1) / SECTORSIZE)
# define MOUNTPT "/mnt/romfs"
# ifndef CONFIG_EXAMPLES_ELF_DEVMINOR
# define CONFIG_EXAMPLES_ELF_DEVMINOR 0
# endif
# ifndef CONFIG_EXAMPLES_ELF_DEVPATH
# define CONFIG_EXAMPLES_ELF_DEVPATH "/dev/ram0"
# endif
#elif defined(CONFIG_EXAMPLES_ELF_CROMFS)
/* Describe the CROMFS file system */
# define MOUNTPT "/mnt/cromfs"
#elif defined(CONFIG_EXAMPLES_ELF_EXTERN) && defined(CONFIG_EXAMPLES_ELF_FSMOUNT)
/* Describe the external file system */
# define MOUNTPT "/mnt/" CONFIG_EXAMPLES_ELF_FSTYPE
#else
# undef MOUNTPT
#endif
/* If CONFIG_DEBUG_FEATURES is enabled, use info/err instead of printf so
* that the output will be synchronous with the debug output.
*/
#ifdef CONFIG_DEBUG_INFO
# define message _info
#else
# define message printf
#endif
#ifdef CONFIG_DEBUG_ERROR
# define errmsg _err
#else
# define errmsg printf
#endif
/****************************************************************************
* Private Data
****************************************************************************/
static unsigned int g_mminitial; /* Initial memory usage */
static unsigned int g_mmstep; /* Memory Usage at beginning of test step */
static const char delimiter[] =
"**************************************"
"**************************************";
#ifndef CONFIG_LIBC_ENVPATH
static char fullpath[128];
#endif
/****************************************************************************
* Symbols from Auto-Generated Code
****************************************************************************/
#if defined(CONFIG_EXAMPLES_ELF_ROMFS) || defined(CONFIG_EXAMPLES_ELF_CROMFS)
extern const unsigned char romfs_img[];
extern const unsigned int romfs_img_len;
#elif !defined(CONFIG_EXAMPLES_ELF_EXTERN)
# error "No file system selected"
#endif
extern const char *dirlist[];
extern const struct symtab_s g_elf_exports[];
extern const int g_elf_nexports;
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: mm_update
****************************************************************************/
static void mm_update(FAR unsigned int *previous, FAR const char *msg)
{
struct mallinfo mmcurrent;
/* Get the current memory usage */
mmcurrent = mallinfo();
/* Show the change from the previous time */
printf("\nMemory Usage %s:\n", msg);
printf(" Before: %8u After: %8u Change: %8d\n",
*previous, mmcurrent.uordblks,
(int)mmcurrent.uordblks - (int)*previous);
/* Set up for the next test */
*previous = mmcurrent.uordblks;
}
/****************************************************************************
* Name: mm_initmonitor
****************************************************************************/
static void mm_initmonitor(void)
{
struct mallinfo mmcurrent;
mmcurrent = mallinfo();
g_mminitial = mmcurrent.uordblks;
g_mmstep = mmcurrent.uordblks;
printf("Initial memory usage: %d\n", mmcurrent.uordblks);
}
/****************************************************************************
* Name: testheader
****************************************************************************/
static inline void testheader(FAR const char *progname)
{
message("\n%s\n* Executing %s\n%s\n\n", delimiter, progname, delimiter);
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: elf_main
****************************************************************************/
int main(int argc, FAR char *argv[])
{
#ifdef CONFIG_EXAMPLES_ELF_FSREMOVEABLE
struct stat buf;
#endif
#ifdef CONFIG_EXAMPLES_ELF_ROMFS
struct boardioc_romdisk_s desc;
#endif
FAR char *args[2];
int ret;
int i;
/* Initialize the memory monitor */
mm_initmonitor();
#if defined(CONFIG_EXAMPLES_ELF_ROMFS)
/* Create a ROM disk for the ROMFS filesystem */
message("Registering romdisk at /dev/ram%d\n",
CONFIG_EXAMPLES_ELF_DEVMINOR);
desc.minor = CONFIG_EXAMPLES_ELF_DEVMINOR; /* Minor device number of the ROM disk. */
desc.nsectors = NSECTORS(romfs_img_len); /* The number of sectors in the ROM disk */
desc.sectsize = SECTORSIZE; /* The size of one sector in bytes */
desc.image = (FAR uint8_t *)romfs_img; /* File system image */
ret = boardctl(BOARDIOC_ROMDISK, (uintptr_t)&desc);
if (ret < 0)
{
errmsg("ERROR: romdisk_register failed: %s\n", strerror(errno));
exit(1);
}
mm_update(&g_mmstep, "after romdisk_register");
/* Mount the ROMFS file system */
message("Mounting ROMFS filesystem at target=%s with source=%s\n",
MOUNTPT, CONFIG_EXAMPLES_ELF_DEVPATH);
ret = mount(CONFIG_EXAMPLES_ELF_DEVPATH, MOUNTPT, "romfs",
MS_RDONLY, NULL);
if (ret < 0)
{
errmsg("ERROR: mount(%s,%s,romfs) failed: %s\n",
CONFIG_EXAMPLES_ELF_DEVPATH, MOUNTPT, strerror(errno));
}
#elif defined(CONFIG_EXAMPLES_ELF_CROMFS)
/* Mount the CROMFS file system */
message("Mounting CROMFS filesystem at target=%s\n", MOUNTPT);
ret = mount(NULL, MOUNTPT, "cromfs", MS_RDONLY, NULL);
if (ret < 0)
{
errmsg("ERROR: mount(%s, cromfs) failed: %s\n",
MOUNTPT, strerror(errno));
}
#elif defined(CONFIG_EXAMPLES_ELF_EXTERN)
/* An external file system is being used */
#if defined(CONFIG_EXAMPLES_ELF_FSMOUNT)
#if defined(CONFIG_EXAMPLES_ELF_FSREMOVEABLE)
/* The file system is removable, wait until the block driver is available */
do
{
ret = stat(CONFIG_EXAMPLES_ELF_DEVPATH, &buf);
if (ret < 0)
{
int errcode = errno;
if (errcode == ENOENT)
{
printf("%s does not exist. Waiting...\n",
CONFIG_EXAMPLES_ELF_DEVPATH);
sleep(1);
}
else
{
printf("ERROR: stat(%s) failed: %s Aborting...\n",
CONFIG_EXAMPLES_ELF_DEVPATH, strerror(errcode));
exit(EXIT_FAILURE);
}
}
else if (!S_ISBLK(buf.st_mode))
{
printf("ERROR: stat(%s) exists but is not a block driver: %04x\n",
CONFIG_EXAMPLES_ELF_DEVPATH, buf.st_mode);
exit(EXIT_FAILURE);
}
}
while (ret < 0);
#endif
/* Mount the external file system */
message("Mounting %s filesystem at target=%s\n",
CONFIG_EXAMPLES_ELF_FSTYPE, MOUNTPT);
ret = mount(CONFIG_EXAMPLES_ELF_DEVPATH, MOUNTPT,
CONFIG_EXAMPLES_ELF_FSTYPE, MS_RDONLY, NULL);
if (ret < 0)
{
errmsg("ERROR: mount(%s, %s, %s) failed: %s\n",
CONFIG_EXAMPLES_ELF_DEVPATH, CONFIG_EXAMPLES_ELF_FSTYPE,
MOUNTPT, strerror(errno));
}
#endif
#else
# Warning "No file system selected"
#endif
mm_update(&g_mmstep, "after mount");
#if defined(CONFIG_LIBC_ENVPATH) && defined(MOUNTPT)
/* Does the system support the PATH variable?
* If YES, then set the PATH variable to the ROMFS mountpoint.
*/
setenv("PATH", MOUNTPT, 1);
#endif
/* Now exercise every program in the ROMFS file system */
for (i = 0; dirlist[i]; i++)
{
FAR const char *filename;
/* Output a separator so that we can clearly discriminate the output of
* this program from the others.
*/
testheader(dirlist[i]);
/* If the binary loader does not support the PATH variable, then
* create the full path to the executable program. Otherwise,
* use the relative path so that the binary loader will have to
* search the PATH variable to find the executable.
*/
#ifdef CONFIG_LIBC_ENVPATH
filename = dirlist[i];
#else
snprintf(fullpath, sizeof(fullpath), "%s/%s", MOUNTPT, dirlist[i]);
filename = fullpath;
#endif
/* Execute the ELF module.
*
* NOTE: The standard posix_spawn() interface would be more correct.
* The non-standard exec() function is used because it provides a
* simple way to pass the symbol table information needed to load the
* program. posix_spawn(), on the other hand, will assume that symbol
* table information is available within the OS.
*/
args[0] = (FAR char *)dirlist[i];
args[1] = NULL;
ret = exec(filename, args, NULL, g_elf_exports, g_elf_nexports);
mm_update(&g_mmstep, "after exec");
if (ret < 0)
{
errmsg("ERROR: exec(%s) failed: %s\n",
dirlist[i], strerror(errno));
}
else
{
message("Wait a bit for test completion\n");
sleep(4);
}
mm_update(&g_mmstep, "after program execution");
}
mm_update(&g_mmstep, "End-of-Test");
return 0;
}