On 08/22/2014 02:51 AM, Kees Cook wrote:
On Thu, Aug 21, 2014 at 3:56 AM, AKASHI Takahiro takahiro.akashi@linaro.org wrote:
Those values (__NR_seccomp_*) are used solely in secure_computing() to identify mode 1 system calls. If compat system calls have different syscall numbers, asm/seccomp.h may override them.
Acked-by: Arnd Bergmann arnd@arndb.de Signed-off-by: AKASHI Takahiro takahiro.akashi@linaro.org
Reviewed-by: Kees Cook keescook@chromium.org
include/asm-generic/seccomp.h | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 include/asm-generic/seccomp.h
diff --git a/include/asm-generic/seccomp.h b/include/asm-generic/seccomp.h new file mode 100644 index 0000000..5e97022 --- /dev/null +++ b/include/asm-generic/seccomp.h @@ -0,0 +1,28 @@ +/*
- include/asm-generic/seccomp.h
- Copyright (C) 2014 Linaro Limited
- Author: AKASHI Takahiro takahiro.akashi@linaro.org
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License version 2 as
- published by the Free Software Foundation.
- */
+#ifndef _ASM_GENERIC_SECCOMP_H +#define _ASM_GENERIC_SECCOMP_H
+#include <asm-generic/unistd.h>
While this isn't a problem for ARM, this should be linux/unistd.h for other architectures to get the right stuff.
I will fix it.
+#if defined(CONFIG_COMPAT) && !defined(__NR_seccomp_read_32) +#define __NR_seccomp_read_32 __NR_read +#define __NR_seccomp_write_32 __NR_write +#define __NR_seccomp_exit_32 __NR_exit +#define __NR_seccomp_sigreturn_32 __NR_rt_sigreturn +#endif /* CONFIG_COMPAT && ! already defined */
+#define __NR_seccomp_read __NR_read +#define __NR_seccomp_write __NR_write +#define __NR_seccomp_exit __NR_exit +#define __NR_seccomp_sigreturn __NR_rt_sigreturn
Some architectures use __NR_sigreturn, so this will need to be adjusted in the future into:
#ifdef __NR_seccomp_sigreturn #define __NR_seccomp_sigreturn __NR_rt_sigreturn #endif
I will fix it.
After these changes, I was able to port x86 to using this asm-generic/seccomp.h too.
Thanks, -Takahiro AKASHI
-Kees
+#endif /* _ASM_GENERIC_SECCOMP_H */
1.7.9.5