diff options
| author |   Kees Cook <keescook@chromium.org> | 2020-09-12 04:08:07 -0700 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2020-09-19 00:59:29 -0700 |
| commit | 31c36eb87c85b6de0f341b1184f90137106a9f81 (patch) | |
| tree | 2a7d8732ff23d3875e5ae39e2c2bfb8481090825 /tools/testing/selftests/seccomp | |
| parent | selftests/seccomp: Refactor arch register macros to avoid xtensa special case (diff) | |
| download | wireguard-linux-31c36eb87c85b6de0f341b1184f90137106a9f81.tar.xz wireguard-linux-31c36eb87c85b6de0f341b1184f90137106a9f81.zip | |
selftests/seccomp: Provide generic syscall setting macro
In order to avoid "#ifdef"s in the main function bodies, create a new
macro, SYSCALL_NUM_SET(), where arch-specific logic can live.
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/lkml/20200912110820.597135-3-keescook@chromium.org
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Diffstat (limited to 'tools/testing/selftests/seccomp')
| -rw-r--r-- | tools/testing/selftests/seccomp/seccomp_bpf.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c index a261643db4b8..c44abe7c6a3c 100644 --- a/tools/testing/selftests/seccomp/seccomp_bpf.c +++ b/tools/testing/selftests/seccomp/seccomp_bpf.c @@ -1760,6 +1760,17 @@ TEST_F(TRACE_poke, getpid_runs_normally) # error "Do not know how to find your architecture's registers and syscalls" #endif +/* + * Most architectures can change the syscall by just updating the + * associated register. This is the default if not defined above. + */ +#ifndef SYSCALL_NUM_SET +# define SYSCALL_NUM_SET(_regs, _nr) \ + do { \ + SYSCALL_NUM(_regs) = (_nr); \ + } while (0) +#endif + /* When the syscall return can't be changed, stub out the tests for it. */ #ifdef SYSCALL_NUM_RET_SHARE_REG # define EXPECT_SYSCALL_RETURN(val, action) EXPECT_EQ(-1, action) @@ -1830,14 +1841,14 @@ void change_syscall(struct __test_metadata *_metadata, defined(__s390__) || defined(__hppa__) || defined(__riscv) || \ defined(__xtensa__) || defined(__csky__) || defined(__sh__) { - SYSCALL_NUM(regs) = syscall; + SYSCALL_NUM_SET(regs, syscall); } #elif defined(__mips__) { if (SYSCALL_NUM(regs) == __NR_O32_Linux) regs.SYSCALL_SYSCALL_NUM = syscall; else - SYSCALL_NUM(regs) = syscall; + SYSCALL_NUM_SET(regs, syscall); } #elif defined(__arm__) |