X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;ds=sidebyside;f=src%2Fshared%2Flinux%2Fseccomp.h;fp=src%2Fshared%2Flinux%2Fseccomp.h;h=9c03683fa006826db964adbfa08fab21e41b0ac3;hb=8351ceaea9480d9c2979aa2ff0f4982cfdfef58d;hp=0000000000000000000000000000000000000000;hpb=cd96b3b86abb4a88cac2722bdfb6e5d4413f6831;p=elogind.git diff --git a/src/shared/linux/seccomp.h b/src/shared/linux/seccomp.h new file mode 100644 index 000000000..9c03683fa --- /dev/null +++ b/src/shared/linux/seccomp.h @@ -0,0 +1,47 @@ +#ifndef _LINUX_SECCOMP_H +#define _LINUX_SECCOMP_H + + +#include + + +/* Valid values for seccomp.mode and prctl(PR_SET_SECCOMP, ) */ +#define SECCOMP_MODE_DISABLED 0 /* seccomp is not in use. */ +#define SECCOMP_MODE_STRICT 1 /* uses hard-coded filter. */ +#define SECCOMP_MODE_FILTER 2 /* uses user-supplied filter. */ + +/* + * All BPF programs must return a 32-bit value. + * The bottom 16-bits are for optional return data. + * The upper 16-bits are ordered from least permissive values to most. + * + * The ordering ensures that a min_t() over composed return values always + * selects the least permissive choice. + */ +#define SECCOMP_RET_KILL 0x00000000U /* kill the task immediately */ +#define SECCOMP_RET_TRAP 0x00030000U /* disallow and force a SIGSYS */ +#define SECCOMP_RET_ERRNO 0x00050000U /* returns an errno */ +#define SECCOMP_RET_TRACE 0x7ff00000U /* pass to a tracer or disallow */ +#define SECCOMP_RET_ALLOW 0x7fff0000U /* allow */ + +/* Masks for the return value sections. */ +#define SECCOMP_RET_ACTION 0x7fff0000U +#define SECCOMP_RET_DATA 0x0000ffffU + +/** + * struct seccomp_data - the format the BPF program executes over. + * @nr: the system call number + * @arch: indicates system call convention as an AUDIT_ARCH_* value + * as defined in . + * @instruction_pointer: at the time of the system call. + * @args: up to 6 system call arguments always stored as 64-bit values + * regardless of the architecture. + */ +struct seccomp_data { + int nr; + __u32 arch; + __u64 instruction_pointer; + __u64 args[6]; +}; + +#endif /* _LINUX_SECCOMP_H */