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readme: more info on kernel panics, oops an backtraces.

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myinsmod: use either finit or init
This commit is contained in:
Ciro Santilli
2018-04-14 19:11:13 +01:00
parent 7b0bd10c0b
commit a08a87dc0f
8 changed files with 398 additions and 51 deletions
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45
kernel_module/user/myinsmod.c
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@@ -7,17 +7,19 @@
#include <unistd.h>
#include <stdlib.h>
#define init_module(mod, len, opts) syscall(__NR_init_module, mod, len, opts)
#define init_module(module_image, len, param_values) syscall(__NR_init_module, module_image, len, param_values)
#define finit_module(fd, param_values, flags) syscall(__NR_finit_module, fd, param_values, flags)
int main(int argc, char **argv) {
const char *params;
int fd;
int fd, use_finit;
size_t image_size;
struct stat st;
void *image;
/* CLI handling. */
if (argc < 2) {
puts("Usage ./prog mymodule.ko [args]");
puts("Usage ./prog mymodule.ko [args="" [use_finit=0]");
return EXIT_FAILURE;
}
if (argc < 3) {
@@ -25,16 +27,33 @@ int main(int argc, char **argv) {
} else {
params = argv[2];
}
fd = open(argv[1], O_RDONLY);
fstat(fd, &st);
image_size = st.st_size;
image = malloc(image_size);
read(fd, image, image_size);
close(fd);
if (init_module(image, image_size, params) != 0) {
perror("init_module");
return EXIT_FAILURE;
if (argc < 4) {
use_finit = 0;
} else {
use_finit = (argv[3][0] != '0');
}
/* Action. */
fd = open(argv[1], O_RDONLY);
if (use_finit) {
puts("finit");
if (finit_module(fd, params, 0) != 0) {
perror("finit_module");
return EXIT_FAILURE;
}
close(fd);
} else {
puts("init");
fstat(fd, &st);
image_size = st.st_size;
image = malloc(image_size);
read(fd, image, image_size);
close(fd);
if (init_module(image, image_size, params) != 0) {
perror("init_module");
return EXIT_FAILURE;
}
free(image);
}
free(image);
return EXIT_SUCCESS;
}