selftests/bpf: Fix tests to use arch-dependent syscall entry points

Some of the tests are using x86_64 ABI-specific syscall entry points
(such as __x64_sys_nanosleep and __x64_sys_getpgid). Update them to use
architecture-dependent syscall entry names.

Also update fexit_sleep test to not use BPF_PROG() so that it is clear
that the syscall parameters aren't being accessed in the bpf prog.

Note that none of the bpf progs in these tests are actually accessing
any of the syscall parameters. The only exception is perfbuf_bench, which
passes on the bpf prog context into bpf_perf_event_output() as a pointer
to pt_regs, but that looks to be mostly ignored.

Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/e35f7051f03e269b623a68b139d8ed131325f7b7.1643973917.git.naveen.n.rao@linux.vnet.ibm.com

11 files changed, 34 insertions, 23 deletions

diff --git a/tools/testing/selftests/bpf/progs/bloom_filter_bench.c b/tools/testing/selftests/bpf/progs/bloom_filter_bench.c
index d9a88dd1ea65..7efcbdbe772d 100644
--- a/tools/testing/selftests/bpf/progs/bloom_filter_bench.c
+++ b/tools/testing/selftests/bpf/progs/bloom_filter_bench.c
@@ -5,6 +5,7 @@
 #include <linux/bpf.h>
 #include <stdbool.h>
 #include <bpf/bpf_helpers.h>
+#include "bpf_misc.h"
 
 char _license[] SEC("license") = "GPL";
 
@@ -87,7 +88,7 @@ bloom_callback(struct bpf_map *map, __u32 *key, void *val,
 	return 0;
 }
 
-SEC("fentry/__x64_sys_getpgid")
+SEC("fentry/" SYS_PREFIX "sys_getpgid")
 int bloom_lookup(void *ctx)
 {
 	struct callback_ctx data;
@@ -100,7 +101,7 @@ int bloom_lookup(void *ctx)
 	return 0;
 }
 
-SEC("fentry/__x64_sys_getpgid")
+SEC("fentry/" SYS_PREFIX "sys_getpgid")
 int bloom_update(void *ctx)
 {
 	struct callback_ctx data;
@@ -113,7 +114,7 @@ int bloom_update(void *ctx)
 	return 0;
 }
 
-SEC("fentry/__x64_sys_getpgid")
+SEC("fentry/" SYS_PREFIX "sys_getpgid")
 int bloom_hashmap_lookup(void *ctx)
 {
 	__u64 *result;
diff --git a/tools/testing/selftests/bpf/progs/bloom_filter_map.c b/tools/testing/selftests/bpf/progs/bloom_filter_map.c
index 1316f3db79d9..f245fcfe0c61 100644
--- a/tools/testing/selftests/bpf/progs/bloom_filter_map.c
+++ b/tools/testing/selftests/bpf/progs/bloom_filter_map.c
@@ -3,6 +3,7 @@
 
 #include <linux/bpf.h>
 #include <bpf/bpf_helpers.h>
+#include "bpf_misc.h"
 
 char _license[] SEC("license") = "GPL";
 
@@ -51,7 +52,7 @@ check_elem(struct bpf_map *map, __u32 *key, __u32 *val,
 	return 0;
 }
 
-SEC("fentry/__x64_sys_getpgid")
+SEC("fentry/" SYS_PREFIX "sys_getpgid")
 int inner_map(void *ctx)
 {
 	struct bpf_map *inner_map;
@@ -70,7 +71,7 @@ int inner_map(void *ctx)
 	return 0;
 }
 
-SEC("fentry/__x64_sys_getpgid")
+SEC("fentry/" SYS_PREFIX "sys_getpgid")
 int check_bloom(void *ctx)
 {
 	struct callback_ctx data;
diff --git a/tools/testing/selftests/bpf/progs/bpf_loop.c b/tools/testing/selftests/bpf/progs/bpf_loop.c
index 12349e4601e8..e08565282759 100644
--- a/tools/testing/selftests/bpf/progs/bpf_loop.c
+++ b/tools/testing/selftests/bpf/progs/bpf_loop.c
@@ -3,6 +3,7 @@
 
 #include "vmlinux.h"
 #include <bpf/bpf_helpers.h>
+#include "bpf_misc.h"
 
 char _license[] SEC("license") = "GPL";
 
@@ -53,7 +54,7 @@ static int nested_callback1(__u32 index, void *data)
 	return 0;
 }
 
-SEC("fentry/__x64_sys_nanosleep")
+SEC("fentry/" SYS_PREFIX "sys_nanosleep")
 int test_prog(void *ctx)
 {
 	struct callback_ctx data = {};
@@ -71,7 +72,7 @@ int test_prog(void *ctx)
 	return 0;
 }
 
-SEC("fentry/__x64_sys_nanosleep")
+SEC("fentry/" SYS_PREFIX "sys_nanosleep")
 int prog_null_ctx(void *ctx)
 {
 	if (bpf_get_current_pid_tgid() >> 32 != pid)
@@ -82,7 +83,7 @@ int prog_null_ctx(void *ctx)
 	return 0;
 }
 
-SEC("fentry/__x64_sys_nanosleep")
+SEC("fentry/" SYS_PREFIX "sys_nanosleep")
 int prog_invalid_flags(void *ctx)
 {
 	struct callback_ctx data = {};
@@ -95,7 +96,7 @@ int prog_invalid_flags(void *ctx)
 	return 0;
 }
 
-SEC("fentry/__x64_sys_nanosleep")
+SEC("fentry/" SYS_PREFIX "sys_nanosleep")
 int prog_nested_calls(void *ctx)
 {
 	struct callback_ctx data = {};
diff --git a/tools/testing/selftests/bpf/progs/bpf_loop_bench.c b/tools/testing/selftests/bpf/progs/bpf_loop_bench.c
index 9dafdc244462..4ce76eb064c4 100644
--- a/tools/testing/selftests/bpf/progs/bpf_loop_bench.c
+++ b/tools/testing/selftests/bpf/progs/bpf_loop_bench.c
@@ -3,6 +3,7 @@
 
 #include "vmlinux.h"
 #include <bpf/bpf_helpers.h>
+#include "bpf_misc.h"
 
 char _license[] SEC("license") = "GPL";
 
@@ -14,7 +15,7 @@ static int empty_callback(__u32 index, void *data)
 	return 0;
 }
 
-SEC("fentry/__x64_sys_getpgid")
+SEC("fentry/" SYS_PREFIX "sys_getpgid")
 int benchmark(void *ctx)
 {
 	for (int i = 0; i < 1000; i++) {
diff --git a/tools/testing/selftests/bpf/progs/fexit_sleep.c b/tools/testing/selftests/bpf/progs/fexit_sleep.c
index bca92c9bd29a..106dc75efcc4 100644
--- a/tools/testing/selftests/bpf/progs/fexit_sleep.c
+++ b/tools/testing/selftests/bpf/progs/fexit_sleep.c
@@ -3,6 +3,7 @@
 #include "vmlinux.h"
 #include <bpf/bpf_helpers.h>
 #include <bpf/bpf_tracing.h>
+#include "bpf_misc.h"
 
 char LICENSE[] SEC("license") = "GPL";
 
@@ -10,8 +11,8 @@ int pid = 0;
 int fentry_cnt = 0;
 int fexit_cnt = 0;
 
-SEC("fentry/__x64_sys_nanosleep")
-int BPF_PROG(nanosleep_fentry, const struct pt_regs *regs)
+SEC("fentry/" SYS_PREFIX "sys_nanosleep")
+int nanosleep_fentry(void *ctx)
 {
 	if (bpf_get_current_pid_tgid() >> 32 != pid)
 		return 0;
@@ -20,8 +21,8 @@ int BPF_PROG(nanosleep_fentry, const struct pt_regs *regs)
 	return 0;
 }
 
-SEC("fexit/__x64_sys_nanosleep")
-int BPF_PROG(nanosleep_fexit, const struct pt_regs *regs, int ret)
+SEC("fexit/" SYS_PREFIX "sys_nanosleep")
+int nanosleep_fexit(void *ctx)
 {
 	if (bpf_get_current_pid_tgid() >> 32 != pid)
 		return 0;
diff --git a/tools/testing/selftests/bpf/progs/perfbuf_bench.c b/tools/testing/selftests/bpf/progs/perfbuf_bench.c
index e5ab4836a641..45204fe0c570 100644
--- a/tools/testing/selftests/bpf/progs/perfbuf_bench.c
+++ b/tools/testing/selftests/bpf/progs/perfbuf_bench.c
@@ -4,6 +4,7 @@
 #include <linux/bpf.h>
 #include <stdint.h>
 #include <bpf/bpf_helpers.h>
+#include "bpf_misc.h"
 
 char _license[] SEC("license") = "GPL";
 
@@ -18,7 +19,7 @@ const volatile int batch_cnt = 0;
 long sample_val = 42;
 long dropped __attribute__((aligned(128))) = 0;
 
-SEC("fentry/__x64_sys_getpgid")
+SEC("fentry/" SYS_PREFIX "sys_getpgid")
 int bench_perfbuf(void *ctx)
 {
 	__u64 *sample;
diff --git a/tools/testing/selftests/bpf/progs/ringbuf_bench.c b/tools/testing/selftests/bpf/progs/ringbuf_bench.c
index 123607d314d6..6a468496f539 100644
--- a/tools/testing/selftests/bpf/progs/ringbuf_bench.c
+++ b/tools/testing/selftests/bpf/progs/ringbuf_bench.c
@@ -4,6 +4,7 @@
 #include <linux/bpf.h>
 #include <stdint.h>
 #include <bpf/bpf_helpers.h>
+#include "bpf_misc.h"
 
 char _license[] SEC("license") = "GPL";
 
@@ -30,7 +31,7 @@ static __always_inline long get_flags()
 	return sz >= wakeup_data_size ? BPF_RB_FORCE_WAKEUP : BPF_RB_NO_WAKEUP;
 }
 
-SEC("fentry/__x64_sys_getpgid")
+SEC("fentry/" SYS_PREFIX "sys_getpgid")
 int bench_ringbuf(void *ctx)
 {
 	long *sample, flags;
diff --git a/tools/testing/selftests/bpf/progs/test_ringbuf.c b/tools/testing/selftests/bpf/progs/test_ringbuf.c
index eaa7d9dba0be..5bdc0d38efc0 100644
--- a/tools/testing/selftests/bpf/progs/test_ringbuf.c
+++ b/tools/testing/selftests/bpf/progs/test_ringbuf.c
@@ -3,6 +3,7 @@
 
 #include <linux/bpf.h>
 #include <bpf/bpf_helpers.h>
+#include "bpf_misc.h"
 
 char _license[] SEC("license") = "GPL";
 
@@ -35,7 +36,7 @@ long prod_pos = 0;
 /* inner state */
 long seq = 0;
 
-SEC("fentry/__x64_sys_getpgid")
+SEC("fentry/" SYS_PREFIX "sys_getpgid")
 int test_ringbuf(void *ctx)
 {
 	int cur_pid = bpf_get_current_pid_tgid() >> 32;
diff --git a/tools/testing/selftests/bpf/progs/trace_printk.c b/tools/testing/selftests/bpf/progs/trace_printk.c
index 119582aa105a..6695478c2b25 100644
--- a/tools/testing/selftests/bpf/progs/trace_printk.c
+++ b/tools/testing/selftests/bpf/progs/trace_printk.c
@@ -4,6 +4,7 @@
 #include "vmlinux.h"
 #include <bpf/bpf_helpers.h>
 #include <bpf/bpf_tracing.h>
+#include "bpf_misc.h"
 
 char _license[] SEC("license") = "GPL";
 
@@ -12,7 +13,7 @@ int trace_printk_ran = 0;
 
 const char fmt[] = "Testing,testing %d\n";
 
-SEC("fentry/__x64_sys_nanosleep")
+SEC("fentry/" SYS_PREFIX "sys_nanosleep")
 int sys_enter(void *ctx)
 {
 	trace_printk_ret = bpf_trace_printk(fmt, sizeof(fmt),
diff --git a/tools/testing/selftests/bpf/progs/trace_vprintk.c b/tools/testing/selftests/bpf/progs/trace_vprintk.c
index d327241ba047..969306cd4f33 100644
--- a/tools/testing/selftests/bpf/progs/trace_vprintk.c
+++ b/tools/testing/selftests/bpf/progs/trace_vprintk.c
@@ -4,6 +4,7 @@
 #include "vmlinux.h"
 #include <bpf/bpf_helpers.h>
 #include <bpf/bpf_tracing.h>
+#include "bpf_misc.h"
 
 char _license[] SEC("license") = "GPL";
 
@@ -11,7 +12,7 @@ int null_data_vprintk_ret = 0;
 int trace_vprintk_ret = 0;
 int trace_vprintk_ran = 0;
 
-SEC("fentry/__x64_sys_nanosleep")
+SEC("fentry/" SYS_PREFIX "sys_nanosleep")
 int sys_enter(void *ctx)
 {
 	static const char one[] = "1";
diff --git a/tools/testing/selftests/bpf/progs/trigger_bench.c b/tools/testing/selftests/bpf/progs/trigger_bench.c
index 2098f3f27f18..2ab049b54d6c 100644
--- a/tools/testing/selftests/bpf/progs/trigger_bench.c
+++ b/tools/testing/selftests/bpf/progs/trigger_bench.c
@@ -5,6 +5,7 @@
 #include <asm/unistd.h>
 #include <bpf/bpf_helpers.h>
 #include <bpf/bpf_tracing.h>
+#include "bpf_misc.h"
 
 char _license[] SEC("license") = "GPL";
 
@@ -25,28 +26,28 @@ int BPF_PROG(bench_trigger_raw_tp, struct pt_regs *regs, long id)
 	return 0;
 }
 
-SEC("kprobe/__x64_sys_getpgid")
+SEC("kprobe/" SYS_PREFIX "sys_getpgid")
 int bench_trigger_kprobe(void *ctx)
 {
 	__sync_add_and_fetch(&hits, 1);
 	return 0;
 }
 
-SEC("fentry/__x64_sys_getpgid")
+SEC("fentry/" SYS_PREFIX "sys_getpgid")
 int bench_trigger_fentry(void *ctx)
 {
 	__sync_add_and_fetch(&hits, 1);
 	return 0;
 }
 
-SEC("fentry.s/__x64_sys_getpgid")
+SEC("fentry.s/" SYS_PREFIX "sys_getpgid")
 int bench_trigger_fentry_sleep(void *ctx)
 {
 	__sync_add_and_fetch(&hits, 1);
 	return 0;
 }
 
-SEC("fmod_ret/__x64_sys_getpgid")
+SEC("fmod_ret/" SYS_PREFIX "sys_getpgid")
 int bench_trigger_fmodret(void *ctx)
 {
 	__sync_add_and_fetch(&hits, 1);