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#include "errno.h"
#include "main/inits.h"
#include "fs/fcntl.h"
#include "fs/file.h"
#include "fs/vfs_syscall.h"
#include "util/debug.h"
#include "util/init.h"
#include "util/list.h"
#include "mm/kmalloc.h"
#include "api/binfmt.h"
typedef struct binfmt
{
const char *bf_id;
binfmt_load_func_t bf_load;
list_link_t bf_link;
} binfmt_t;
static list_t binfmt_list = LIST_INITIALIZER(binfmt_list);
long binfmt_add(const char *id, binfmt_load_func_t loadfunc)
{
binfmt_t *fmt;
if (NULL == (fmt = kmalloc(sizeof(*fmt))))
{
return -ENOMEM;
}
dbg(DBG_EXEC, "Registering binary loader %s\n", id);
fmt->bf_id = id;
fmt->bf_load = loadfunc;
list_insert_head(&binfmt_list, &fmt->bf_link);
return 0;
}
long binfmt_load(const char *filename, char *const *argv, char *const *envp,
uint64_t *rip, uint64_t *rsp)
{
long fd = do_open(filename, O_RDONLY);
if (fd < 0)
{
dbg(DBG_EXEC, "ERROR: exec failed to open file %s\n", filename);
return fd;
}
file_t *file = fget((int)fd);
long ret = 0;
if (S_ISDIR(file->f_vnode->vn_mode))
{
ret = -EISDIR;
}
if (!ret && !S_ISREG(file->f_vnode->vn_mode))
{
ret = -EACCES;
}
fput(&file);
if (ret)
{
do_close((int)fd);
return ret;
}
list_iterate(&binfmt_list, fmt, binfmt_t, bf_link)
{
dbg(DBG_EXEC, "Trying to exec %s using binary loader %s\n", filename,
fmt->bf_id);
/* ENOEXE indicates that the given loader is unable to load
* the given file, any other error indicates that the file
* was recognized, but some other error existed which should
* be returned to the user, only if all loaders specify ENOEXEC
* do we actually return ENOEXEC */
ret = fmt->bf_load(filename, (int)fd, argv, envp, rip, rsp);
if (ret != -ENOEXEC)
{
do_close((int)fd);
}
}
do_close((int)fd);
return ret;
}
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