ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/tools/perf/examples/bpf/augmented_syscalls.c b/marvell/linux/tools/perf/examples/bpf/augmented_syscalls.c
new file mode 100644
index 0000000..524fdb8
--- /dev/null
+++ b/marvell/linux/tools/perf/examples/bpf/augmented_syscalls.c
@@ -0,0 +1,169 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Augment syscalls with the contents of the pointer arguments.
+ *
+ * Test it with:
+ *
+ * perf trace -e tools/perf/examples/bpf/augmented_syscalls.c cat /etc/passwd > /dev/null
+ *
+ * It'll catch some openat syscalls related to the dynamic linked and
+ * the last one should be the one for '/etc/passwd'.
+ *
+ * This matches what is marshalled into the raw_syscall:sys_enter payload
+ * expected by the 'perf trace' beautifiers, and can be used by them, that will
+ * check if perf_sample->raw_data is more than what is expected for each
+ * syscalls:sys_{enter,exit}_SYSCALL tracepoint, uing the extra data as the
+ * contents of pointer arguments.
+ */
+
+#include <stdio.h>
+#include <linux/socket.h>
+
+/* bpf-output associated map */
+bpf_map(__augmented_syscalls__, PERF_EVENT_ARRAY, int, u32, __NR_CPUS__);
+
+struct syscall_exit_args {
+ unsigned long long common_tp_fields;
+ long syscall_nr;
+ long ret;
+};
+
+struct augmented_filename {
+ unsigned int size;
+ int reserved;
+ char value[256];
+};
+
+#define augmented_filename_syscall(syscall) \
+struct augmented_enter_##syscall##_args { \
+ struct syscall_enter_##syscall##_args args; \
+ struct augmented_filename filename; \
+}; \
+int syscall_enter(syscall)(struct syscall_enter_##syscall##_args *args) \
+{ \
+ struct augmented_enter_##syscall##_args augmented_args = { .filename.reserved = 0, }; \
+ unsigned int len = sizeof(augmented_args); \
+ probe_read(&augmented_args.args, sizeof(augmented_args.args), args); \
+ augmented_args.filename.size = probe_read_str(&augmented_args.filename.value, \
+ sizeof(augmented_args.filename.value), \
+ args->filename_ptr); \
+ if (augmented_args.filename.size < sizeof(augmented_args.filename.value)) { \
+ len -= sizeof(augmented_args.filename.value) - augmented_args.filename.size; \
+ len &= sizeof(augmented_args.filename.value) - 1; \
+ } \
+ /* If perf_event_output fails, return non-zero so that it gets recorded unaugmented */ \
+ return perf_event_output(args, &__augmented_syscalls__, BPF_F_CURRENT_CPU, \
+ &augmented_args, len); \
+} \
+int syscall_exit(syscall)(struct syscall_exit_args *args) \
+{ \
+ return 1; /* 0 as soon as we start copying data returned by the kernel, e.g. 'read' */ \
+}
+
+struct syscall_enter_openat_args {
+ unsigned long long common_tp_fields;
+ long syscall_nr;
+ long dfd;
+ char *filename_ptr;
+ long flags;
+ long mode;
+};
+
+augmented_filename_syscall(openat);
+
+struct syscall_enter_open_args {
+ unsigned long long common_tp_fields;
+ long syscall_nr;
+ char *filename_ptr;
+ long flags;
+ long mode;
+};
+
+augmented_filename_syscall(open);
+
+struct syscall_enter_inotify_add_watch_args {
+ unsigned long long common_tp_fields;
+ long syscall_nr;
+ long fd;
+ char *filename_ptr;
+ long mask;
+};
+
+augmented_filename_syscall(inotify_add_watch);
+
+struct statbuf;
+
+struct syscall_enter_newstat_args {
+ unsigned long long common_tp_fields;
+ long syscall_nr;
+ char *filename_ptr;
+ struct stat *statbuf;
+};
+
+augmented_filename_syscall(newstat);
+
+#ifndef _K_SS_MAXSIZE
+#define _K_SS_MAXSIZE 128
+#endif
+
+#define augmented_sockaddr_syscall(syscall) \
+struct augmented_enter_##syscall##_args { \
+ struct syscall_enter_##syscall##_args args; \
+ struct sockaddr_storage addr; \
+}; \
+int syscall_enter(syscall)(struct syscall_enter_##syscall##_args *args) \
+{ \
+ struct augmented_enter_##syscall##_args augmented_args; \
+ unsigned long addrlen = sizeof(augmented_args.addr); \
+ probe_read(&augmented_args.args, sizeof(augmented_args.args), args); \
+/* FIXME_CLANG_OPTIMIZATION_THAT_ACCESSES_USER_CONTROLLED_ADDRLEN_DESPITE_THIS_CHECK */ \
+/* if (addrlen > augmented_args.args.addrlen) */ \
+/* addrlen = augmented_args.args.addrlen; */ \
+/* */ \
+ probe_read(&augmented_args.addr, addrlen, args->addr_ptr); \
+ /* If perf_event_output fails, return non-zero so that it gets recorded unaugmented */ \
+ return perf_event_output(args, &__augmented_syscalls__, BPF_F_CURRENT_CPU, \
+ &augmented_args, \
+ sizeof(augmented_args) - sizeof(augmented_args.addr) + addrlen);\
+} \
+int syscall_exit(syscall)(struct syscall_exit_args *args) \
+{ \
+ return 1; /* 0 as soon as we start copying data returned by the kernel, e.g. 'read' */ \
+}
+
+struct sockaddr;
+
+struct syscall_enter_bind_args {
+ unsigned long long common_tp_fields;
+ long syscall_nr;
+ long fd;
+ struct sockaddr *addr_ptr;
+ unsigned long addrlen;
+};
+
+augmented_sockaddr_syscall(bind);
+
+struct syscall_enter_connect_args {
+ unsigned long long common_tp_fields;
+ long syscall_nr;
+ long fd;
+ struct sockaddr *addr_ptr;
+ unsigned long addrlen;
+};
+
+augmented_sockaddr_syscall(connect);
+
+struct syscall_enter_sendto_args {
+ unsigned long long common_tp_fields;
+ long syscall_nr;
+ long fd;
+ void *buff;
+ long len;
+ unsigned long flags;
+ struct sockaddr *addr_ptr;
+ long addr_len;
+};
+
+augmented_sockaddr_syscall(sendto);
+
+license(GPL);