0a2d5a4e90
1. elfloader for shared object example: TencentOS-tiny\examples\elfloader_shared_object keil: TencentOS-tiny\board\TencentOS_tiny_EVB_MX_Plus\KEIL\elfloader_shared_object 2. elfloader for relocatable object: example: TencentOS-tiny\examples\elfloader_relocatable_object keil: TencentOS-tiny\board\TencentOS_tiny_EVB_MX_Plus\KEIL\elfloader_relocatable_object 3. TODO: - add icache/dcache flush when module is loaded - support more relocation type in elfloader_arch_relocate
101 lines
1.8 KiB
C
101 lines
1.8 KiB
C
#include "tos_k.h"
|
|
#include "tos_hal.h"
|
|
#include "ff.h"
|
|
#include "tos_vfs.h"
|
|
#include "tos_fatfs_drv.h"
|
|
#include "tos_fatfs_vfs.h"
|
|
|
|
#include "tos_elfloader.h"
|
|
|
|
int d_e_a = 9;
|
|
|
|
int f_e_a(int a)
|
|
{
|
|
/* a = d_e_a + d_g_a = d_e_a + 15 = 24 */
|
|
printf("f_e_a: %d\n", a);
|
|
return 0;
|
|
}
|
|
|
|
const el_symbol_t el_symbols[] = {
|
|
{ "d_e_a", &d_e_a },
|
|
{ "f_e_a", f_e_a },
|
|
{ K_NULL, K_NULL },
|
|
};
|
|
|
|
/*
|
|
step1: create 1.c
|
|
|
|
extern int d_e_a;
|
|
|
|
int d_g_a = 3;
|
|
|
|
static int d_s_a = 5;
|
|
|
|
extern int f_e_a(int);
|
|
|
|
static int f_s_a(void) {
|
|
d_s_a += 7; // d_s_a = 12
|
|
}
|
|
|
|
int f_g_a(void) {
|
|
f_s_a();
|
|
|
|
d_g_a += d_s_a; // d_g_a = 15
|
|
|
|
d_e_a += d_g_a; // + 15
|
|
|
|
f_e_a(d_e_a);
|
|
}
|
|
|
|
step2: compile 1.c to 1.o
|
|
arm-linux-gnueabihf-gcc -fno-builtin -nostdlib -mthumb -mthumb-interwork -mcpu=cortex-m4 -c 1.c -o 1.o
|
|
*/
|
|
|
|
void application_entry(void *arg)
|
|
{
|
|
int fd;
|
|
el_module_t module;
|
|
|
|
extern vfs_blkdev_ops_t sd_dev;
|
|
extern vfs_fs_ops_t fatfs_ops;
|
|
|
|
if (tos_vfs_block_device_register("/dev/sd", &sd_dev) != VFS_ERR_NONE) {
|
|
return;
|
|
}
|
|
|
|
if (tos_vfs_fs_register("fatfs_sd", &fatfs_ops) != VFS_ERR_NONE) {
|
|
return;
|
|
}
|
|
|
|
if (tos_vfs_fs_mount("/dev/sd", "/fs/fatfs_sd", "fatfs_sd") != VFS_ERR_NONE) {
|
|
printf("mount failed!\n");
|
|
return;
|
|
}
|
|
|
|
fd = tos_vfs_open("/fs/fatfs_sd/1.o", VFS_OFLAG_READ | VFS_OFLAG_EXISTING);
|
|
if (fd < 0) {
|
|
return;
|
|
}
|
|
|
|
if (tos_elfloader_load(&module, fd) != ELFLOADER_ERR_NONE) {
|
|
return;
|
|
}
|
|
|
|
void *addr = tos_elfloader_find_symbol(&module, "f_g_a");
|
|
if (!addr) {
|
|
printf("symbol NOT FOUND: %s\n", "f_g_a");
|
|
return;
|
|
}
|
|
|
|
printf("addr: %x\n", addr);
|
|
|
|
typedef int (*fp_t)(void);
|
|
/* call f_g_a in 1.o */
|
|
((fp_t)addr)();
|
|
|
|
tos_elfloader_unload(&module);
|
|
|
|
tos_vfs_close(fd);
|
|
}
|
|
|