diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/test_probe_user.c')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/test_probe_user.c | 43 |
1 files changed, 32 insertions, 11 deletions
diff --git a/tools/testing/selftests/bpf/progs/test_probe_user.c b/tools/testing/selftests/bpf/progs/test_probe_user.c index 89b3532ccc75..a8e501af9604 100644 --- a/tools/testing/selftests/bpf/progs/test_probe_user.c +++ b/tools/testing/selftests/bpf/progs/test_probe_user.c @@ -1,26 +1,47 @@ // SPDX-License-Identifier: GPL-2.0 - -#include <linux/ptrace.h> -#include <linux/bpf.h> - -#include <netinet/in.h> - +#include "vmlinux.h" #include <bpf/bpf_helpers.h> #include <bpf/bpf_tracing.h> +#include <bpf/bpf_core_read.h> +#include "bpf_misc.h" static struct sockaddr_in old; -SEC("kprobe/__sys_connect") -int BPF_KPROBE(handle_sys_connect) +static int handle_sys_connect_common(struct sockaddr_in *uservaddr) { - void *ptr = (void *)PT_REGS_PARM2(ctx); struct sockaddr_in new; - bpf_probe_read_user(&old, sizeof(old), ptr); + bpf_probe_read_user(&old, sizeof(old), uservaddr); __builtin_memset(&new, 0xab, sizeof(new)); - bpf_probe_write_user(ptr, &new, sizeof(new)); + bpf_probe_write_user(uservaddr, &new, sizeof(new)); + + return 0; +} + +SEC("ksyscall/connect") +int BPF_KSYSCALL(handle_sys_connect, int fd, struct sockaddr_in *uservaddr, + int addrlen) +{ + return handle_sys_connect_common(uservaddr); +} + +#if defined(bpf_target_s390) +#ifndef SYS_CONNECT +#define SYS_CONNECT 3 +#endif + +SEC("ksyscall/socketcall") +int BPF_KSYSCALL(handle_sys_socketcall, int call, unsigned long *args) +{ + if (call == SYS_CONNECT) { + struct sockaddr_in *uservaddr; + + bpf_probe_read_user(&uservaddr, sizeof(uservaddr), &args[1]); + return handle_sys_connect_common(uservaddr); + } return 0; } +#endif char _license[] SEC("license") = "GPL"; |