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csky: Add SECCOMP_FILTER supported

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secure_computing() is called first in syscall_trace_enter() so that
a system call will be aborted quickly without doing succeeding syscall
tracing if seccomp rules want to deny that system call.

TODO:
 - Update https://github.com/seccomp/libseccomp csky support

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Cc: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Guo Ren
2020-05-26 08:11:52 +00:00
parent c23dd2405f
commit e95a4f8cb9
6 changed files with 37 additions and 4 deletions
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13
tools/testing/selftests/seccomp/seccomp_bpf.c
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@@ -116,6 +116,8 @@ struct seccomp_data {
# define __NR_seccomp 277
# elif defined(__riscv)
# define __NR_seccomp 277
# elif defined(__csky__)
# define __NR_seccomp 277
# elif defined(__hppa__)
# define __NR_seccomp 338
# elif defined(__powerpc__)
@@ -1603,6 +1605,14 @@ TEST_F(TRACE_poke, getpid_runs_normally)
# define ARCH_REGS struct user_regs_struct
# define SYSCALL_NUM a7
# define SYSCALL_RET a0
#elif defined(__csky__)
# define ARCH_REGS struct pt_regs
#if defined(__CSKYABIV2__)
# define SYSCALL_NUM regs[3]
#else
# define SYSCALL_NUM regs[9]
#endif
# define SYSCALL_RET a0
#elif defined(__hppa__)
# define ARCH_REGS struct user_regs_struct
# define SYSCALL_NUM gr[20]
@@ -1693,7 +1703,8 @@ void change_syscall(struct __test_metadata *_metadata,
EXPECT_EQ(0, ret) {}
#if defined(__x86_64__) || defined(__i386__) || defined(__powerpc__) || \
defined(__s390__) || defined(__hppa__) || defined(__riscv)
defined(__s390__) || defined(__hppa__) || defined(__riscv) || \
defined(__csky__)
{
regs.SYSCALL_NUM = syscall;
}