diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/test_attach_probe.c')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/test_attach_probe.c | 73 |
1 files changed, 66 insertions, 7 deletions
diff --git a/tools/testing/selftests/bpf/progs/test_attach_probe.c b/tools/testing/selftests/bpf/progs/test_attach_probe.c index ce9acf4db8d2..a1e45fec8938 100644 --- a/tools/testing/selftests/bpf/progs/test_attach_probe.c +++ b/tools/testing/selftests/bpf/progs/test_attach_probe.c @@ -1,10 +1,10 @@ // SPDX-License-Identifier: GPL-2.0 // Copyright (c) 2017 Facebook -#include <linux/ptrace.h> -#include <linux/bpf.h> +#include "vmlinux.h" #include <bpf/bpf_helpers.h> #include <bpf/bpf_tracing.h> +#include <bpf/bpf_core_read.h> #include "bpf_misc.h" int kprobe_res = 0; @@ -17,6 +17,11 @@ int uprobe_byname_res = 0; int uretprobe_byname_res = 0; int uprobe_byname2_res = 0; int uretprobe_byname2_res = 0; +int uprobe_byname3_sleepable_res = 0; +int uprobe_byname3_res = 0; +int uretprobe_byname3_sleepable_res = 0; +int uretprobe_byname3_res = 0; +void *user_ptr = 0; SEC("kprobe") int handle_kprobe(struct pt_regs *ctx) @@ -25,13 +30,24 @@ int handle_kprobe(struct pt_regs *ctx) return 0; } -SEC("kprobe/" SYS_PREFIX "sys_nanosleep") -int BPF_KPROBE(handle_kprobe_auto) +SEC("ksyscall/nanosleep") +int BPF_KSYSCALL(handle_kprobe_auto, struct __kernel_timespec *req, struct __kernel_timespec *rem) { kprobe2_res = 11; return 0; } +/** + * This program will be manually made sleepable on the userspace side + * and should thus be unattachable. + */ +SEC("kprobe/" SYS_PREFIX "sys_nanosleep") +int handle_kprobe_sleepable(struct pt_regs *ctx) +{ + kprobe_res = 2; + return 0; +} + SEC("kretprobe") int handle_kretprobe(struct pt_regs *ctx) { @@ -39,11 +55,11 @@ int handle_kretprobe(struct pt_regs *ctx) return 0; } -SEC("kretprobe/" SYS_PREFIX "sys_nanosleep") -int BPF_KRETPROBE(handle_kretprobe_auto) +SEC("kretsyscall/nanosleep") +int BPF_KRETPROBE(handle_kretprobe_auto, int ret) { kretprobe2_res = 22; - return 0; + return ret; } SEC("uprobe") @@ -93,4 +109,47 @@ int handle_uretprobe_byname2(struct pt_regs *ctx) return 0; } +static __always_inline bool verify_sleepable_user_copy(void) +{ + char data[9]; + + bpf_copy_from_user(data, sizeof(data), user_ptr); + return bpf_strncmp(data, sizeof(data), "test_data") == 0; +} + +SEC("uprobe.s//proc/self/exe:trigger_func3") +int handle_uprobe_byname3_sleepable(struct pt_regs *ctx) +{ + if (verify_sleepable_user_copy()) + uprobe_byname3_sleepable_res = 9; + return 0; +} + +/** + * same target as the uprobe.s above to force sleepable and non-sleepable + * programs in the same bpf_prog_array + */ +SEC("uprobe//proc/self/exe:trigger_func3") +int handle_uprobe_byname3(struct pt_regs *ctx) +{ + uprobe_byname3_res = 10; + return 0; +} + +SEC("uretprobe.s//proc/self/exe:trigger_func3") +int handle_uretprobe_byname3_sleepable(struct pt_regs *ctx) +{ + if (verify_sleepable_user_copy()) + uretprobe_byname3_sleepable_res = 11; + return 0; +} + +SEC("uretprobe//proc/self/exe:trigger_func3") +int handle_uretprobe_byname3(struct pt_regs *ctx) +{ + uretprobe_byname3_res = 12; + return 0; +} + + char _license[] SEC("license") = "GPL"; |