Release 4.11 fs/binfmt_em86.c
/*
* linux/fs/binfmt_em86.c
*
* Based on linux/fs/binfmt_script.c
* Copyright (C) 1996 Martin von Löwis
* original #!-checking implemented by tytso.
*
* em86 changes Copyright (C) 1997 Jim Paradis
*/
#include <linux/module.h>
#include <linux/string.h>
#include <linux/stat.h>
#include <linux/binfmts.h>
#include <linux/elf.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/errno.h>
#define EM86_INTERP "/usr/bin/em86"
#define EM86_I_NAME "em86"
static int load_em86(struct linux_binprm *bprm)
{
const char *i_name, *i_arg;
char *interp;
struct file * file;
int retval;
struct elfhdr elf_ex;
/* Make sure this is a Linux/Intel ELF executable... */
elf_ex = *((struct elfhdr *)bprm->buf);
if (memcmp(elf_ex.e_ident, ELFMAG, SELFMAG) != 0)
return -ENOEXEC;
/* First of all, some simple consistency checks */
if ((elf_ex.e_type != ET_EXEC && elf_ex.e_type != ET_DYN) ||
(!((elf_ex.e_machine == EM_386) || (elf_ex.e_machine == EM_486))) ||
!bprm->file->f_op->mmap) {
return -ENOEXEC;
}
/* Need to be able to load the file after exec */
if (bprm->interp_flags & BINPRM_FLAGS_PATH_INACCESSIBLE)
return -ENOENT;
allow_write_access(bprm->file);
fput(bprm->file);
bprm->file = NULL;
/* Unlike in the script case, we don't have to do any hairy
* parsing to find our interpreter... it's hardcoded!
*/
interp = EM86_INTERP;
i_name = EM86_I_NAME;
i_arg = NULL; /* We reserve the right to add an arg later */
/*
* Splice in (1) the interpreter's name for argv[0]
* (2) (optional) argument to interpreter
* (3) filename of emulated file (replace argv[0])
*
* This is done in reverse order, because of how the
* user environment and arguments are stored.
*/
remove_arg_zero(bprm);
retval = copy_strings_kernel(1, &bprm->filename, bprm);
if (retval < 0) return retval;
bprm->argc++;
if (i_arg) {
retval = copy_strings_kernel(1, &i_arg, bprm);
if (retval < 0) return retval;
bprm->argc++;
}
retval = copy_strings_kernel(1, &i_name, bprm);
if (retval < 0) return retval;
bprm->argc++;
/*
* OK, now restart the process with the interpreter's inode.
* Note that we use open_exec() as the name is now in kernel
* space, and we don't need to copy it.
*/
file = open_exec(interp);
if (IS_ERR(file))
return PTR_ERR(file);
bprm->file = file;
retval = prepare_binprm(bprm);
if (retval < 0)
return retval;
return search_binary_handler(bprm);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 292 | 94.19% | 7 | 77.78% |
| David Drysdale | 13 | 4.19% | 1 | 11.11% |
| Daniel Wagner | 5 | 1.61% | 1 | 11.11% |
| Total | 310 | 100.00% | 9 | 100.00% |
static struct linux_binfmt em86_format = {
.module = THIS_MODULE,
.load_binary = load_em86,
};
static int __init init_em86_binfmt(void)
{
register_binfmt(&em86_format);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 15 | 83.33% | 3 | 75.00% |
| Al Viro | 3 | 16.67% | 1 | 25.00% |
| Total | 18 | 100.00% | 4 | 100.00% |
static void __exit exit_em86_binfmt(void)
{
unregister_binfmt(&em86_format);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 15 | 100.00% | 2 | 100.00% |
| Total | 15 | 100.00% | 2 | 100.00% |
core_initcall(init_em86_binfmt);
module_exit(exit_em86_binfmt);
MODULE_LICENSE("GPL");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 365 | 88.81% | 11 | 52.38% |
| David Drysdale | 13 | 3.16% | 1 | 4.76% |
| Dave Jones | 8 | 1.95% | 2 | 9.52% |
| Jan-Benedict Glaw | 6 | 1.46% | 1 | 4.76% |
| Andrew Morton | 5 | 1.22% | 1 | 4.76% |
| Daniel Wagner | 5 | 1.22% | 1 | 4.76% |
| Art Haas | 4 | 0.97% | 1 | 4.76% |
| Al Viro | 3 | 0.73% | 1 | 4.76% |
| Jan Engelhardt | 1 | 0.24% | 1 | 4.76% |
| Chris Wright | 1 | 0.24% | 1 | 4.76% |
| Total | 411 | 100.00% | 21 | 100.00% |
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