mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 08:19:28 +00:00
2347961b11
It can be useful to the interpreter to know which flags are in use. For instance, knowing if the preserve-argv[0] is in use would allow to skip the pathname argument. This patch uses an unused auxiliary vector, AT_FLAGS, to add a flag to inform interpreter if the preserve-argv[0] is enabled. Note by Helge Deller: The real-world user of this patch is qemu-user, which needs to know if it has to preserve the argv[0]. See Debian bug #970460. Signed-off-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: YunQiang Su <ysu@wavecomp.com> URL: http://bugs.debian.org/970460 Signed-off-by: Helge Deller <deller@gmx.de>
25 lines
791 B
C
25 lines
791 B
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
|
|
#ifndef _UAPI_LINUX_BINFMTS_H
|
|
#define _UAPI_LINUX_BINFMTS_H
|
|
|
|
#include <linux/capability.h>
|
|
|
|
struct pt_regs;
|
|
|
|
/*
|
|
* These are the maximum length and maximum number of strings passed to the
|
|
* execve() system call. MAX_ARG_STRLEN is essentially random but serves to
|
|
* prevent the kernel from being unduly impacted by misaddressed pointers.
|
|
* MAX_ARG_STRINGS is chosen to fit in a signed 32-bit integer.
|
|
*/
|
|
#define MAX_ARG_STRLEN (PAGE_SIZE * 32)
|
|
#define MAX_ARG_STRINGS 0x7FFFFFFF
|
|
|
|
/* sizeof(linux_binprm->buf) */
|
|
#define BINPRM_BUF_SIZE 256
|
|
|
|
/* preserve argv0 for the interpreter */
|
|
#define AT_FLAGS_PRESERVE_ARGV0_BIT 0
|
|
#define AT_FLAGS_PRESERVE_ARGV0 (1 << AT_FLAGS_PRESERVE_ARGV0_BIT)
|
|
|
|
#endif /* _UAPI_LINUX_BINFMTS_H */
|