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avoid embedding directives in macro arguments

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doing so is undefined behavior
This commit is contained in:
xfnw 2024-05-02 11:39:10 -04:00
parent be4ea168b7
commit 59dd92d738
1 changed files with 29 additions and 29 deletions
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34
fbflut.c
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@ -26,29 +26,29 @@
BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, SYS_##syscall, 0, 1), \
BPF_STMT(BPF_RET + BPF_K, SECCOMP_RET_ALLOW)
#if defined(__x86_64__)
#define MY_AUDIT_ARCH AUDIT_ARCH_X86_64
#elif defined(__i386__)
#define MY_AUDIT_ARCH AUDIT_ARCH_I386
#elif defined(__riscv) && __riscv_xlen == 64
#define MY_AUDIT_ARCH AUDIT_ARCH_RISCV64
#elif defined(__riscv) && __riscv_xlen == 32
#define MY_AUDIT_ARCH AUDIT_ARCH_RISCV32
#elif defined(__arm__)
#define MY_AUDIT_ARCH AUDIT_ARCH_ARM
#elif defined(__aarch64__)
#define MY_AUDIT_ARCH AUDIT_ARCH_AARCH64
#else
#error unknown architecture, file a bug or turn off seccomp
#endif
static int setup_seccomp() {
struct sock_filter filter[] = {
/* check if architecture is the same as what we
* were compiled with */
BPF_STMT(BPF_LD + BPF_W + BPF_ABS,
offsetof(struct seccomp_data, arch)),
BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K,
#if defined(__x86_64__)
AUDIT_ARCH_X86_64,
#elif defined(__i386__)
AUDIT_ARCH_I386,
#elif defined(__riscv) && __riscv_xlen == 64
AUDIT_ARCH_RISCV64,
#elif defined(__riscv) && __riscv_xlen == 32
AUDIT_ARCH_RISCV32,
#elif defined(__arm__)
AUDIT_ARCH_ARM,
#elif defined(__aarch64__)
AUDIT_ARCH_AARCH64,
#else
#error unknown architecture, file a bug or turn off seccomp
#endif
1, 0),
BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, MY_AUDIT_ARCH, 1, 0),
BPF_STMT(BPF_RET + BPF_K, SECCOMP_RET_KILL_PROCESS),
/* check syscalls */
BPF_STMT(BPF_LD + BPF_W + BPF_ABS,